KR102645375B1 - Steel fuel tank for vehicle - Google Patents

Abstract

The plastic baffle located inside the steel fuel tank of the vehicle, the fixing part installed on the inner side of the steel fuel tank of the vehicle, the assembly part provided on the baffle and formed with a through hole into which the fixing part is inserted, and the fixing part with the fixing part inserted into the through hole. A steel fuel tank for a vehicle that includes a fastening part that is fastened to the government and integrates the plastic baffle and the steel fuel tank is introduced.

Description

Steel fuel tank of vehicle {STEEL FUEL TANK FOR VEHICLE}

The present invention relates to a steel fuel tank for a vehicle, and more specifically, to a steel fuel tank for a vehicle that has a structure in which a baffle made of plastic rather than steel can be stably assembled to the steel fuel tank.

Typically, automobiles are equipped with tanks to store fluids, such as a fuel tank that stores fuel including gasoline or diesel fuel supplied to the cylinder of the engine, and a urea solution tank that stores urea solution.

Since the tank that stores the fluid is a rectangular shape made of thin steel plates and has a cylindrical shape with a predetermined volume, when the vehicle suddenly brakes or starts suddenly, the fluid stored inside tends to spill.

In particular, in the case of fuel tanks, the slushing phenomenon of fuel caused by the above fluid concentration is becoming a problem. This slushing refers to a non-linear flow phenomenon that occurs due to vibration while the vehicle is running.

Slushing in the fuel tank is known to occur most often when the fuel amount is 50 to 70%, and due to slushing, the fluid stored in the fuel tank shakes and hits the inner wall of the tank, generating noise due to impact.

In other words, when shock is applied to the inner wall of the fuel tank due to the slushing phenomenon, deformation of the fuel tank, noise, and vibration occur. Therefore, various methods are needed to reduce noise by alleviating the impact of fuel flow on the inner wall of the fuel tank. This is the situation.

The slushing noise of fuel tanks has been pointed out as a problem for a long time, and the most commonly used method to solve this problem is to install a baffle with multiple holes in the fuel tank.

In the case of a fuel tank made of steel, multiple baffles with through holes are installed vertically or horizontally within the fuel tank to prevent the fuel stored inside from being tilted to one side. At this time, the baffle is made of the same steel material as the fuel tank, and then fixed to the inner side of the fuel tank by spot welding, as shown in Figures 1 and 2.

However, this method has problems in that the degree of freedom in the design shape of the baffle is reduced due to the limitations of the steel material, and the manufacturing cost and weight increase excessively. Additionally, since spot welding is used to fix the baffle, there is a problem of fuel leakage due to corrosion at the welding point.

The matters described as background technology above are only for the purpose of improving understanding of the background of the present invention, and should not be taken as acknowledgment that they correspond to prior art already known to those skilled in the art.

KR 10-0581795 B1

The present invention was proposed to solve this problem. By providing an assembly part, a fixing part, and a fastening part that can stably assemble a baffle made of plastic to a steel fuel tank, the cost of the steel fuel tank of the vehicle is reduced and fuel efficiency is reduced. The goal is to provide a steel fuel tank for a vehicle that not only reduces the weight of the tank, but also improves the degree of freedom in the design shape of the baffle.

The steel fuel tank of a vehicle according to the present invention for achieving the above object is provided on a plastic baffle located inside the steel fuel tank of the vehicle, a fixing part installed on the inner side of the steel fuel tank of the vehicle, and the baffle, and the fixing part is inserted. It includes an assembly part in which a through hole is formed and a fastening part that is fastened to the fixing part while the fixing part is inserted into the through hole to integrate the plastic baffle and the steel fuel tank.

In the steel fuel tank of a vehicle according to the present invention, a predetermined gap may be formed between the lower surface of the assembly portion and the inner surface of the steel fuel tank of the vehicle.

The assembly part of the steel fuel tank of the vehicle according to the present invention may be provided with a step portion so that a step is formed in the fastening direction of the fastening portion along the shape of the through hole.

The baffle of the steel fuel tank of a vehicle according to the present invention further includes a baffle body formed in a direction perpendicular to the assembly portion to form a partition in the vertical direction, and the step portion is formed along the shape of the through hole, with one side facing the baffle body. It may be extended to form an open portion at the end of the extension portion.

The fastening part of the steel fuel tank of the vehicle according to the present invention has a flange part formed so that the lower surface of the flange part and the upper surface of the step part are in surface contact and can be fastened to the fixing part.

The baffle of the steel fuel tank of a vehicle according to the present invention further includes a baffle body formed in a direction perpendicular to the assembly unit to form a partition extending vertically, and a plurality of baffle bodies are formed on the outer surface of the baffle body in the vertical or horizontal direction. Ribs may be formed.

The baffle of the steel fuel tank of a vehicle according to the present invention further includes a baffle body formed in a direction perpendicular to the assembly part to form a partition extending in the vertical direction, and the assembly part is formed in plural pieces, and the baffle body is formed with the baffle body as the reference. It may be formed to protrude to one side or the other side.

The baffle body of the steel fuel tank of a vehicle according to the present invention is composed of a plurality of assembly bodies each connected to a plurality of assembly parts and a connection body connecting each assembly body, and the thickness of the connection body may be formed to be thinner than the thickness of the assembly body. You can.

The baffle body of the steel fuel tank of a vehicle according to the present invention is composed of a plurality of assembly bodies each connected to a plurality of assembly parts and a connection body connecting each assembly body, and the connection body has a bent portion formed at the connection point with the assembly body. It can be.

In the steel fuel tank of a vehicle according to the present invention, a plurality of ribs are formed in the horizontal direction on the outer surface of the baffle body, and the ribs at the points where the bent portions are formed may be thicker than the ribs at the points where the bent portions are not formed.

According to the steel fuel tank of the vehicle of the present invention, the following effects are achieved.

First, since a plastic baffle is used instead of a conventional steel baffle, manufacturing cost and weight can be reduced.

Second, due to the characteristics of the plastic material, the degree of freedom in the design shape of the baffle can be improved.

Third, by forming a step in the assembly part, additional rigidity is secured through friction with the fastening part, allowing the plastic baffle to be stably assembled to the steel fuel tank.

Fourth, there is an advantage that injection molding is easy by forming an opening in the assembly part.

Figure 1 is a diagram showing a steel baffle applied to a steel fuel tank of a conventional vehicle.
Figure 2 is an enlarged view of area A in Figure 1.
Figure 3 is a view showing a plastic baffle applied to the inside of a steel fuel tank of a vehicle according to an embodiment of the present invention.
Figure 4 is a view showing a plastic baffle according to an embodiment of the present invention.
Figure 5 is a diagram showing an assembly unit according to an embodiment of the present invention.
Figure 6 is a diagram showing a fixing part according to an embodiment of the present invention.
Figure 7 is a diagram showing the process of combining the fixing part, the assembly part, and the fastening part according to an embodiment of the present invention.
Figure 8 is a side view showing a state in which the fixing part, the assembly part, and the fastening part are combined according to an embodiment of the present invention.
Figure 9 is a view showing the shape of the step part of the assembly part.
Figure 10 is a top view of a plastic baffle according to an embodiment of the present invention.

Throughout this specification, when a part “includes” a certain component, this means that it may further include other components rather than excluding other components, unless specifically stated to the contrary.

In addition, terms such as first and/or second may be used to describe various components, but these terms are only used to distinguish the component from other components, for example, from the scope of rights according to the concept of the present invention. Without exception, the first component may be referred to as the second component, and similarly the second component may also be referred to as the first component.

Hereinafter, the configuration and operating principles of various embodiments of the disclosed invention will be described in detail with reference to the attached drawings.

Figure 1 is a diagram showing a steel baffle applied to a steel fuel tank 1 of a conventional vehicle, Figure 2 is an enlarged view of area A in Figure 1, and Figure 3 is a steel baffle of a vehicle according to an embodiment of the present invention. This is a diagram showing the plastic baffle (2) applied to the inside of the fuel tank (1), Figure 4 is a diagram showing the plastic baffle (2) according to an embodiment of the present invention, and Figure 5 is an embodiment of the present invention. It is a drawing showing the assembly part 200 according to , Figure 6 is a drawing showing the fixing part 100 according to an embodiment of the present invention, and Figure 7 is a drawing showing the fixing part 100 according to an embodiment of the present invention. It is a diagram showing the process of combining the assembly part 200 and the fastening part 300, and Figure 8 shows the fastening part 100, the assembly part 200, and the fastening part 300 according to an embodiment of the present invention. It is a side view showing the assembled state, and FIG. 9 is a diagram showing the shape of the step portion 210 of the assembly portion 200, and FIG. 10 is a plan view of the plastic baffle 2 according to an embodiment of the present invention.

In order to facilitate understanding of the present invention, a chronic problem in the field of a vehicle's fuel tank 1 will first be presented, and key features of the present invention to solve the problem will be sequentially explained.

In general, a vehicle engine is a device that converts heat energy into mechanical rotational force by rotating the crankshaft using explosive power generated by burning fuel in the combustion chamber. An engine requires a continuous supply of fuel to be burned in the combustion chamber, and for continuous supply of fuel, the vehicle is equipped with a fuel tank (1) that can store a certain amount of fuel.

This fuel tank 1 is generally formed by welding an upper plate and a lower plate made of thin steel plates to form an exterior, and an internal space in which fuel is stored is formed between the upper plate and the lower plate.

The fuel stored in the internal space of the fuel tank (1) is drawn in an unspecified direction within the fuel tank (1) when the vehicle is running, which causes slushing, a non-linear flow phenomenon of fuel, to become a problem.

In other words, due to the slushing phenomenon, the fuel in the fuel tank (1) flows, and when an impact is applied to the inner wall of the fuel tank (1), the steel plate of the fuel tank (1) is deformed or noise is generated due to the impact. There is a problem that needs to be addressed.

Such slushing noise of the fuel tank (1) has long been pointed out as a problem in the field of vehicle fuel tanks (1), and the most commonly used method to solve this problem is to create multiple slushing noises in the fuel tank (1). A baffle (2) with two through holes is installed.

That is, the baffle 2 with a plurality of through holes is installed vertically or horizontally in the fuel tank 1 to prevent the fuel stored inside from being tilted to one side. At this time, the baffle is made of the same steel material as the fuel tank 1, and then spot welded and fixed to the inner surface 11 of the fuel tank 1, as shown in FIGS. 1 and 2.

Here, spot welding refers to a welding method in which two or more metal plates to be welded are overlapped, pressure is applied, and then electricity is passed to melt and join the metals using heat generated by the contact resistance between the metal plates and the specific resistance of the metal plates.

However, this method has the problem that if the welding point is corroded, the baffle (2) is not properly fixed in the fuel tank (1) or fuel leaks.

In addition, the degree of freedom in the design shape of the baffle is reduced due to the limitations of the steel material, there is a problem of weight increase due to the weight of the steel material itself, and if other metal materials are used to secure rigidity while reducing weight, the cost increases. there is a problem.

Accordingly, the steel fuel tank 1 of a vehicle according to the present invention uses a baffle 2 made of plastic instead of the conventional baffle made of steel, thereby improving the freedom of design shape of the baffle 2 and reducing manufacturing cost and weight. A structure in which the baffle (2) can be stably assembled to the fuel tank (1) without using a spot welding method by forming a separate assembly part (200), a fixing part (100), and a fastening part (300). The intention is to present .

Hereinafter, with reference to the attached drawings, we will look at the key features of each component of the present invention in more detail.

Figure 4 is a diagram showing a plastic baffle 2 according to an embodiment of the present invention, Figure 5 is a diagram showing an assembly unit 200 according to an embodiment of the present invention, and Figure 6 is an embodiment of the present invention. This is a diagram showing the fixing part 100 according to an example, and Figure 7 is a diagram showing the process of combining the fixing part 100, the assembly part 200, and the fastening part 300 according to an embodiment of the present invention. Figure 8 is a side view showing a state in which the fixing part 100, the assembly part 200, and the fastening part 300 according to an embodiment of the present invention are combined.

4 to 8, the steel fuel tank 1 of a vehicle according to the present invention includes a plastic baffle 2 located inside the steel fuel tank 1 of the vehicle, and a steel fuel tank 1 of the vehicle. The fixing part 100 installed on the side 11, the assembly part 200 provided on the baffle 2 and formed with a through hole 201 into which the fixing part 100 is inserted, and the fixing part in the through hole 201 ( It includes a fastening part 300 that is fastened to the fixing part 100 in the inserted state to integrate the plastic baffle 2 and the steel fuel tank 1.

As the fixing part 100, stud bolts may be used as shown in FIG. 6. A stud bolt is a bolt in which the entire bolt is made of threads. One end is coupled to the main body, and the other end is fastened with a nut to connect and secure the main body and another component.

That is, as shown in FIG. 7, one end of the fixing part 100 is installed on the inner surface 11 of the steel fuel tank 1 of the vehicle, and the fastening part 300 is tightened at the other end to form a fixing part ( The assembly part 200 located between 100 and the fastening part 300 is fixed. At this time, the assembly part 200 is provided on the plastic baffle 2, and by fastening the fastening part 300 to the fixing part 100, the plastic baffle 2 and the steel fuel tank 1 are combined and integrated.

A through hole 201 into which the fixing part 100 is inserted is formed in the assembly part 200, and with the fixing part 100 inserted through the lower part of the through hole 201, the fixing part 100 is inserted into the upper part of the through hole 201. The fastening part 300 is fastened to the exposed fixing part 100.

Ultimately, the steel fuel tank 1 of the vehicle according to the present invention has a combined structure of the assembly part 200, the fixing part 100, and the fastening part 300 as described above, without using the existing spot welding method. There is an advantage in that the baffle (2) can be stably fixed inside the fuel tank (1).

In addition, since spot welding is not used, a baffle (2) made of plastic can be used, thereby reducing weight and cost compared to existing baffles made of steel. In addition, as the degree of freedom in the design shape of the baffle (2) increases by using plastic material, it is possible to utilize the baffle (2) of a more complex shape than before.

In addition, compared to the welding process, which requires a high level of concentration due to concerns about safety issues during work, a relatively convenient assembly method can be used, which improves the worker's work efficiency and fundamentally prevents corrosion problems at the welding point. There are advantages to this.

Figure 8 is a side view showing a state in which the fixing part 100, the assembly part 200, and the fastening part 300 according to an embodiment of the present invention are combined.

Referring to FIG. 8, there is a predetermined gap 400 between the lower surface of the assembly part 200 in the steel fuel tank 1 of the vehicle according to the present invention and the inner surface 11 of the steel fuel tank 1 of the vehicle. can be formed.

This can be understood as being intended to ensure that the plastic baffle (2) is stably installed inside the fuel tank (1) without tilting and to increase the degree of freedom of shape of the inner surface (11) of the steel fuel tank (1).

Looking at this in detail, if the entire lower surface of the assembly part 200 is formed to directly contact the inner surface 11 of the steel fuel tank 1 of the vehicle, the following two problems may occur.

First, when the lower surface of the assembly unit 200 and the inner surface 11 of the steel fuel tank 1 are not exactly parallel to each other, when installing the assembly unit 200, the lower surface of the assembly unit 200 and the steel fuel tank 1 are not exactly parallel to each other. A floating section is formed between the inner surface (11) of the fuel tank (1), and the plastic baffle (2) is tilted and combined or combined with the steel fuel tank (1), and flow occurs, causing the plastic baffle (2) and The bonding strength of the steel fuel tank (1) may be weakened.

Second, if there is a bent or curved shape (i.e., curved) on the inner surface (11) of the steel fuel tank (1), the combination of the plastic baffle (2) and the steel fuel tank (1) cannot be properly performed. Problems may arise that make it impossible to do so.

Therefore, the steel fuel tank 1 of the vehicle according to the present invention has a predetermined gap 400 between the lower surface of the assembly part 200 and the inner surface 11 of the steel fuel tank 1, as shown in FIG. 8. The goal is to overcome the two problems above by forming a

That is, only a part of the lower surface of the assembly part 200, including the area where the through hole 201 into which the fixing part 100 is inserted, is formed, is brought into direct surface contact with the inner surface 11 of the steel fuel tank 1, The other area (meaning the area in which the through hole 201 is not formed) forms a predetermined gap 400 with the inner surface 11 of the steel fuel tank 1.

Accordingly, while promoting stable installation of the plastic baffle 2 inside the steel fuel tank 1, there is an effect of increasing the degree of freedom in the shape of the inner surface 11 of the steel fuel tank 1.

Figure 5 is a diagram showing the assembly part 200 according to an embodiment of the present invention, and Figure 7 is a diagram showing the fixing part 100, the assembly part 200, and the fastening part 300 according to an embodiment of the present invention. It is a drawing showing the joining process, and Figure 8 is a side view showing a state in which the fixing part 100, the assembly part 200, and the fastening part 300 according to an embodiment of the present invention are combined, and Figure 9 is a drawing showing the assembly part. This is a diagram showing the shape of the step portion 210 of (200).

5 and 7 to 9, the assembly portion 200 of the steel fuel tank 1 of the vehicle according to the present invention has a step in the fastening direction of the fastening portion 300 along the shape of the through hole 201. A step portion 210 may be provided to form.

The step portion 210 is preferably formed to include an area in the assembly portion 200 where the through hole 201 into which the fixing portion 100 is inserted is formed. The fixing part 100 is inserted through the lower part of the through hole 201, and a portion is exposed to the upper part of the through hole 201, and the fastening part 300 is fastened to the exposed part of the fixing part 100 to be assembled for the first time. It performs the function of fixing the unit 200.

At this time, the cross-sectional area of the fixing part 100 is formed to be somewhat smaller than the cross-sectional area of the through hole 201, so that the fastening part 300 is formed in the space between the outer surface of the fixing part 100 and the inner surface 11 of the through hole 201. ) is fastened by insertion.

Therefore, when flow occurs inside the fuel tank 1 as the vehicle drives in a state in which the assembly part 200, the fixing part 100, and the fastening part 300 are completed, the 'fixing part 100-assembly A load concentration phenomenon due to flow occurs at the point where the part 200 and the fastening part 300 are connected in the order.

Accordingly, one or more of the assembly part 200, the fixing part 100, and the fastening part 300 may be damaged, thereby weakening the bonding force between the plastic baffle 2 and the steel fuel tank 1.

Accordingly, the assembly portion 200 of the steel fuel tank 1 of the vehicle according to the present invention is formed along the shape of the through hole 201 as shown in FIG. 9, and has a fastening portion (as shown in FIG. 8). By providing a step portion 210 that is provided to form a step in the fastening direction of 300), there is an effect of securing additional rigidity in preparation for the occurrence of the load concentration phenomenon as described above.

In addition, as will be seen later, a flange portion 310 may be formed on the fastening portion 300 of the steel fuel tank 1 of the vehicle according to the present invention. At this time, the step portion 210 is in surface contact with the flange portion 310 of the fastening portion 300, thereby making it possible to further maximize the coupling force between the plastic baffle 2 and the steel fuel tank 1.

Figure 5 is a diagram showing the assembly part 200 according to an embodiment of the present invention, and Figure 8 is a diagram showing the fixing part 100, the assembly part 200, and the fastening part 300 according to an embodiment of the present invention. This is a side view showing the assembled state, and Figure 9 is a diagram showing the shape of the step portion 210 of the assembly portion 200.

Referring to FIGS. 5, 8, and 9, the baffle 2 of the steel fuel tank 1 of the vehicle according to the present invention is a baffle body formed in a direction perpendicular to the assembly part 200 and forming a partition in the vertical direction. It further includes (220), and the step portion 210 is formed along the shape of the through hole 201, with one side extending toward the baffle body 220 to form an open portion 211 at the end of the extension portion. You can.

Here, the opening 211 is a configuration that allows the plastic baffle 2 according to the present invention to be easily manufactured by injection molding and ultimately simplifies the manufacturing process.

Injection molding is one of the parts molding methods using a mold. More specifically, it is a method of manufacturing parts of the desired shape by heating and melting a plastic or metal material (hereinafter referred to as 'base material'), then injecting it into the mold and cooling it. it means.

Injection molding can rapidly and continuously manufacture parts of various shapes, and is generally classified as a processing technology suitable for mass production of parts with complex shapes.

When using injection molding, after cooling the base material injected into the mold, the mold and base material are separated by extracting the mold in a direction opposite to the injection direction. At this time, depending on the design conditions of the part, additional shapes may be formed in the part in a direction perpendicular to or oblique to the injection direction. In this case, there is a problem in that it is difficult to separate the mold after cooling the base material, which is called undercut.

As a solution to this undercut, it is common to use a slide core that moves perpendicular to the injection direction or an angular core that moves in an inclined direction.

In the case of the present invention, the baffle 2 includes an assembly unit 200 and a baffle body 220 formed in a direction perpendicular to the assembly unit 200, and a step portion 210 is formed in the assembly unit 200. Therefore, in order to form the step portion 210, a slide core that moves perpendicular to the injection direction for forming the baffle body 220 is required.

However, as shown in FIGS. 5 and 9, when one side of the step portion 210 extends toward the baffle body 220 to form an open portion 211 at the end of the extension portion, through the open portion 211 A mold manufactured in a shape for forming the step portion 210 can be inserted or extracted.

Therefore, molding can be done in the same direction as the injection direction for forming the baffle body 220, so there is no need to provide a separate slide core for forming the step portion 210.

Accordingly, when manufacturing the plastic baffle 2 according to the present invention, injection molding is possible in a simpler method, which has the effect of simplifying the manufacturing process.

Figure 7 is a diagram showing a process in which the fixing part 100, the assembly part 200, and the fastening part 300 are combined according to an embodiment of the present invention.

Referring to FIG. 7, the fastening portion 300 of the steel fuel tank 1 of the vehicle according to the present invention is formed with a flange portion 310, so that the lower surface of the flange portion 310 and the upper surface of the step portion 210 It can be fastened to the fixing part 100 while making contact with this surface.

As discussed above, this can be understood as an attempt to further maximize the bonding force between the plastic baffle (2) and the steel fuel tank (1).

That is, the fastening part 300 of the present invention may use a flange nut on which the flange part 310 is formed. Here, the flange nut is a nut that is wide and flat on one side, and when the nut is fastened to the bolt, the holding force of the nut is evenly distributed over the surface of the flange portion 310 to ensure a stable fixing force.

Therefore, the fastening part 300 of the present invention is formed with a flange part 310 and is fastened to the fixing part 100 while the lower surface of the flange part 310 is in surface contact with the upper surface of the stepped part 210. Additional bonding force is secured through the friction between the upper and lower surfaces of 210, and the holding force of the fastening portion 300 is evenly distributed on the surface of the flange portion 310, thereby securing a more stable fixing force.

Figure 4 is a diagram showing a plastic baffle 2 according to an embodiment of the present invention.

Referring to FIG. 4, the baffle 2 of the steel fuel tank 1 of the vehicle according to the present invention includes a baffle body 220 that is formed in a direction perpendicular to the assembly part 200 and forms a partition extending in the vertical direction. Additionally, a plurality of ribs 224 may be formed on the outer surface of the baffle body 220 in the vertical or horizontal direction.

The baffle (2) installed inside the steel fuel tank (1) acts as a kind of partition and provides resistance to the movement of the fuel flowing inside the fuel tank (1), thus suppressing the sloshing of the fuel as much as possible, thereby preventing fuel flow. It is designed to reduce floating noise.

Therefore, the baffle 2 of the present invention further includes a baffle body 220 that is formed in a direction perpendicular to the assembly portion 200 and forms a partition extending in the vertical direction, thereby reducing the sound of the fuel flowing inside the fuel tank 1. It can be reduced.

As shown in FIG. 4, a plurality of through holes may be formed in such a partition wall, and when such a large number of through holes are formed by injection molding, a problem occurs in which the baffle 2 is distorted or its shape is deformed.

Accordingly, the present invention seeks to minimize the degree of deformation during molding of the baffle 2 by forming a plurality of ribs 224 in the vertical or horizontal direction on the outer surface of the baffle body 220.

Here, the rib 224 can be understood to mean a reinforcing area to support and distribute the load or prevent deformation during molding of the product.

That is, when forming a plurality of through holes in the baffle body 220, the baffle 2 that conforms to the design shape can be secured by reinforcing the peripheral portion of each through hole through the ribs 224 formed in the vertical or horizontal direction. There is an effect.

FIG. 4 is a diagram showing a plastic baffle 2 according to an embodiment of the present invention, and FIG. 10 is a plan view of the plastic baffle 2 according to an embodiment of the present invention.

Referring to Figures 4 and 10, the baffle 2 of the steel fuel tank 1 of the vehicle according to the present invention is formed in a direction perpendicular to the assembly part 200 and forms a baffle body extending in the vertical direction. It further includes 220, and the assembly portion 200 is formed in plural pieces, and may be formed to protrude from one side or the other side of the baffle body 220 with respect to the baffle body 220.

As seen above, the baffle 2 of the present invention further includes a baffle body 220 that is formed in a direction perpendicular to the assembly part 200 and forms a partition extending in the vertical direction to maintain the fuel inside the fuel tank 1. The floating noise can be reduced.

Additionally, a plurality of assembly parts 200 may be formed depending on the design conditions of the plastic baffle 2. At this time, each assembly part 200 may be formed to protrude from one side or the other side of the baffle body 220 with respect to the baffle body 220 .

This will be described in more detail with reference to FIG. 10. Based on the baffle body 220 shown in FIG. 10, the upper side is expressed as one side and the lower side is expressed as the other side. That is, in FIG. 10, two of the three assembly parts 200 are formed to protrude to one side of the baffle body 220, and the remaining assembly part 200 is formed to protrude from the other side of the baffle body 220. It is formed protruding to the side.

As the plurality of assembly parts 200 are formed on one side or the other side of the baffle body 220, pressure is applied to either one side or the other side of the baffle body 220 according to the flow of fuel in the fuel tank 1. Even if pressure is applied, the baffle (2) has a rigidity that can be maintained stably within the fuel tank (1). Accordingly, there is an advantage in that the plastic baffle 2 can stably perform the function of reducing fuel flow noise.

Figure 10 is a plan view of the plastic baffle 2 according to an embodiment of the present invention.

Referring to FIG. 10, the baffle body 220 of the steel fuel tank 1 of the vehicle according to the present invention includes a plurality of assembled bodies 221 each connected to a plurality of assembly parts 200 and each assembled body 221. It consists of a connecting body 222, and the thickness of the connecting body 222 may be thinner than the thickness of the assembled body 221.

Here, names such as assembly body 221 or connection body 222 are merely defined according to the characteristics of each section while dividing the baffle body 220 into some regions or sections to facilitate understanding of the present invention, and these names are This should not be construed as limiting the content of the present invention or interpreting it differently.

Specifically, the area of the baffle body 220 that is directly coupled to the assembly portion 200 corresponds to the assembly body 221, and the region that is not directly coupled to the assembly portion 200 corresponds to the connection body 222. do. And the connection body 222 is located between the two assembly bodies 221 to connect each assembly body 221.

At this time, the thickness of the connection body 222 may be formed to be thinner than the thickness of the assembly body 221, which can be understood as reflecting the degree of freedom in the design shape of the plastic baffle 2.

In other words, if some deformation occurs during injection molding of the plastic baffle 2, or in the process of combining the assembly part 200, the fixing part 100, and the fastening part 300, the position of the assembly part 200 and the fixing part If a predetermined error occurs in the position of (100) and post-deformation of the plastic baffle (2) occurs, the assembly part (200) that has not yet been combined is bent or deformed in a direction to correct this error. This allows the and the fixing part 100 to be combined with their positions exactly aligned.

That is, by forming the thickness of the connection body 222 to be thinner than the thickness of the assembly body 221, the connection body 222 is designed to correct the error that occurs when combining the plastic baffle 2 and the steel fuel tank 1. can be bent or deformed. Accordingly, the assembly part 200, the fixing part 100, and the fastening part 300 can be combined at the correct position, which has the effect of allowing the plastic baffle (2) to be more stably installed in the steel fuel tank (1). .

For reference, since post-deformation of the plastic baffle 2 usually occurs mainly when the assembly portion 200 formed at the lateral end of the baffle 2 is joined, the thickness of all connection bodies 222 must be adjusted to the assembly body ( There is no need to form it thinner than the thickness of 221). More specifically, it will be described with reference to FIG. 10. As shown in FIG. 10, the assembly portion 200 formed on the left side of the baffle 2 and the assembly portion 200 formed in the center of the baffle 2 are first combined, and then the assembly portion formed on the right side of the baffle 2 ( When installing 200), between the assembly body 221 connected to the assembly portion 200 formed in the center of the baffle 2 and the assembly body 221 connected to the assembly portion 200 formed on the right side of the baffle 2. It is sufficient to form only the connecting body 222 to be thin.

However, the shapes in these drawings are merely illustrative shapes to aid understanding of the present invention, and the content of the present invention should not be viewed as limited by these illustrative shapes.

Meanwhile, the baffle body 220 of the steel fuel tank 1 of the vehicle according to the present invention includes a plurality of assembly bodies 221 each connected to a plurality of assembly parts 200 and a connection body connecting each assembly body 221. It is composed of (222), and a bent portion 223 may be formed at the connection point of the connection body 222 with the assembly body 221.

Depending on the internal structure of the steel fuel tank 1, there may be cases where a bent portion 223 must be formed in the baffle body 220. In other words, if a step exists on the inner surface 11 of the steel fuel tank 1 or if a separate support is installed using a reinforced pipe, etc. to secure the rigidity of the steel fuel tank 1 itself, the step Since the baffle 2 must be installed while avoiding the support, a bent portion 223 needs to be formed in the baffle body 220.

And it is preferable that this bent portion 223 is formed on the connecting body 222. If the bent portion 223 is formed in the assembly body 221 on which the assembly portion 200 is formed, the shape of the assembly portion 200 formed by being connected to the assembly body 221 is determined by the shape of the bent portion 223. may be limited. Accordingly, a problem may occur in which the function of the assembly part 200, which is located at the connection point between the plastic baffle 2 and the steel fuel tank 1 and supports external force due to fuel flow, is deteriorated.

Therefore, in the case of the present invention, not only is the above problem prevented by forming a bent portion 223 in the connection body 222, but also the plastic baffle 2 is required regardless of the steel fuel tank 1 having any internal structure. It has the effect of being able to be installed in the designed shape and desired location.

Meanwhile, in the steel fuel tank 1 of the vehicle according to the present invention, a plurality of ribs 224 are formed in the horizontal direction on the outer surface of the baffle body 220, and the rib 224 at the point where the bent portion 223 is formed may be formed to be thicker than the rib 224 at the point where the bent portion 223 is not formed.

Unlike the assembly body 221, which is directly supported by the assembly section 200, the connection body 222 is located a certain distance away from the assembly section 200, so it is necessary to secure additional rigidity.

In particular, as seen above, when the bent portion 223 is formed in the baffle body 220, there is a problem of external force being concentrated on the bent portion 223, so the baffle 2 installed inside the fuel tank 1 In design, securing additional rigidity at the point where the bent portion 223 is formed is a more important consideration.

Accordingly, the steel fuel tank 1 of the vehicle according to the present invention forms a plurality of ribs 224 in the horizontal direction on the outer surface of the baffle body 220 to support the load applied to the baffle body 220 and To prevent deformation of (2), the thickness of the rib 224 at the point where the bent part 223 is formed in the connection body 222 is smaller than the thickness of the rib 224 at the point where the bent part 223 is not formed. By forming it thickly, it is intended to secure additional rigidity at the point where the bent portion 223 is formed.

Accordingly, even if the bent portion 223 is formed in the plastic baffle 2 as shown in FIG. 10, there is an effect of securing the baffle 2 with a stable structure.

Therefore, as described above, according to the steel fuel tank 1 of the vehicle according to the present invention, manufacturing cost and weight can be reduced by using the baffle 2 made of plastic instead of the conventional baffle made of steel, and due to the characteristics of the plastic material, the baffle The degree of freedom of design shape in (2) can be improved. In addition, by forming the step portion 210 in the assembly portion 200, additional rigidity is secured through friction with the fastening portion 300, so that the plastic baffle 2 can be stably assembled to the steel fuel tank 1. Furthermore, there is an advantage that injection molding is easy by forming an open portion 211 in the assembly portion 200.

Although the invention has been shown and described in relation to specific embodiments, it is commonly known in the art that the present invention can be modified and changed in various ways without departing from the technical spirit of the invention as provided by the following claims. It will be self-evident to those with knowledge.

1: Steel fuel tank
2: Plastic baffle
11: Inner side of fuel tank
100: fixing part
200: assembly part
201: Through hole
210: step part
211: opening part
220: Baffle body
221: Assembly body
222: connection body
223: bending part
224: rib
300: fastening part
310: Flange part
400: gap

Claims (10)

A plastic baffle located inside the vehicle's steel fuel tank;
A fixing part installed on the inner side of a steel fuel tank of a vehicle;
An assembly part provided on the baffle and having a through hole into which the fixing part is inserted;
A fastening part that is fastened to the fixing part while the fixing part is inserted into the through hole to integrate the plastic baffle and the steel fuel tank; and
The baffle includes a baffle body formed in a direction perpendicular to the assembly unit to form a partition wall in the vertical direction,
The assembly part is provided with a step portion so that a step is formed in the fastening direction of the fastening portion according to the shape of the through hole.
A steel fuel tank for a vehicle, wherein the stepped portion is formed along the shape of a through hole, with one side extending toward the baffle body and an open portion formed at the end of the extension portion.
In claim 1,
A steel fuel tank for a vehicle, characterized in that a predetermined gap is formed between the lower surface of the assembly portion and the inner surface of the steel fuel tank of the vehicle.
delete delete In claim 1,
A steel fuel tank for a vehicle, wherein the fastening part is formed with a flange part and is fastened to the fixing part while the lower surface of the flange part and the upper surface of the step part are in surface contact.
In claim 1,
The baffle further includes a baffle body formed in a direction perpendicular to the assembly unit to form a partition extending in the vertical direction,
A steel fuel tank for a vehicle, characterized in that a plurality of ribs are formed on the outer surface of the baffle body in the vertical or horizontal direction.
In claim 1,
The baffle further includes a baffle body formed in a direction perpendicular to the assembly unit to form a partition extending in the vertical direction,
A steel fuel tank for a vehicle, characterized in that the assembly portion is formed in a plurality, and is formed by protruding to one side or the other side of the baffle body with respect to the baffle body.
In claim 7,
The baffle body is composed of a plurality of assembly bodies each connected to a plurality of assembly parts and a connection body connecting each assembly body, and the thickness of the connection body is formed to be thinner than the thickness of the assembly body.
In claim 7,
The baffle body is comprised of a plurality of assembled bodies each connected to a plurality of assembly parts, and a connection body connecting each assembly body, and the connection body is a steel fuel tank for a vehicle, characterized in that a bent portion is formed at the connection point with the assembly body.
In claim 9,
A steel fuel tank for a vehicle, wherein a plurality of ribs are formed in the horizontal direction on the outer surface of the baffle body, and the ribs at the points where the bent portions are formed are thicker than the ribs at the points where the bent portions are not formed.