CN211364257U

CN211364257U - Noise reduction component and motor vehicle fuel tank equipped with same

Info

Publication number: CN211364257U
Application number: CN201921975173.XU
Authority: CN
Inventors: 张俊; 徐义坤
Original assignee: Wuhan Plastic Omnium Auto Inergy Co Ltd
Current assignee: Wuhan Plastic Omnium Auto Inergy Co Ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-08-28
Anticipated expiration: 2029-11-15

Abstract

The utility model provides a motor vehicle fuel tank that is used for motor vehicle fuel tank to fall parts of making an uproar (20) and should fall parts of making an uproar of installation. The noise reduction component comprises a supporting column (22) fixed in the fuel tank and a noise reduction grid (24) slidably mounted on the supporting column, the noise reduction grid comprises rod pieces extending along at least two different directions, and the density of the whole noise reduction grid is smaller than or equal to that of fuel in the fuel tank, so that the noise reduction grid can float on the liquid level of the fuel. Therefore, the fuel liquid level is divided into a plurality of small liquid levels through the grating, so that the fuel is prevented from generating large shaking on a large area and noise caused by the shaking. In addition, fuel evaporation and emission are reduced by covering a part of the area of the fuel level with a noise reduction grid.

Description

Noise reduction component and motor vehicle fuel tank equipped with same

Technical Field

The utility model relates to a part of making an uproar falls for motor vehicle's fuel tank, especially is used for motor vehicle fuel tank.

Background

When the vehicle starts, accelerates, brakes, turns, and the like, fuel in the fuel tank can shake accordingly, and noise is generated. In recent years, in order to meet the use requirements of users, baffles (English basffles) for reducing noise are installed in fuel tanks of some motor vehicles.

In the prior art, these baffles are generally in the form of flat plates welded to the fuel tank body by means of welded studs, the baffles being mounted parallel to the side walls of the fuel tank, i.e. parallel to the vertical direction Z of the motor vehicle. These noise reduction baffles are large in size, usually adopt plastic part injection moulding, and size and appearance are not easy to control. Meanwhile, in order to achieve a good noise reduction effect, the distance between the noise reduction baffle and the wall of the fuel tank needs to be small enough after the noise reduction baffle is installed in the fuel tank. In the process of blow molding the fuel tank, the noise reduction baffle is easy to deform or adhere to the fuel tank, and a barrier layer of the plastic fuel tank can be damaged seriously, so that the emission of the fuel tank is easy to exceed the standard.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve above-mentioned technical problem, provide a part of making an uproar falls convenient to production and installation.

Therefore, the utility model provides a part of making an uproar falls for motor vehicle fuel tank which characterized in that, its including be used for fixing at inside rest post of fuel tank and slidable install in the grid of making an uproar falls of rest post, fall the grid of making an uproar including respectively along the member that extends two at least not equidirectional, the whole density that falls the grid of making an uproar is slightly less than or equal to fuel density in the fuel tank for it can float on the fuel liquid level.

It can be understood that the noise reduction grid is arranged along the horizontal direction of the fuel tank after being installed in the fuel tank, and the size of the noise reduction grid in the height direction is small, so that the noise reduction grid is not adhered to the fuel tank in the blow molding process of the fuel tank, and the difficulty of process control of blow molding of the fuel tank can be obviously reduced. In addition, compare the jumbo size plate among the prior art, according to the utility model discloses a grid of making an uproar falls is latticed, can reduce the requirement in the aspect of the size precision to a certain extent, also can save material moreover, reduce the dead weight.

According to the utility model discloses a part of making an uproar falls, the adoption will fall the mode that the grid of making an uproar floats in fuel level surface, cuts apart into a plurality of little liquid levels with the fuel liquid level through the grid to prevent the fuel to produce the big noise of rocking and bringing from this on the large tracts of land. And because the noise reduction grating is slidably mounted on the supporting column and the density of the noise reduction grating is set to be capable of floating on the liquid level of the fuel, the position of the noise reduction grating can be changed along with the change of the liquid level, and the noise reduction requirements of different liquid levels can be met.

In addition, the area of the fuel level covered by the noise reduction grill can be set by adjusting the width, number, or overall length of the rods. In the area covered by the noise reduction grid, the fuel is not contacted with the air in the fuel tank, so that the surface area of the free liquid level of the fuel is reduced, and the evaporation of the fuel is reduced. And the oil gas content in the fuel tank is reduced, so that the whole discharge capacity of the fuel tank can be reduced, and the fuel tank is favorable for meeting the environmental protection requirement.

The noise reduction features described above may also include one or more of the following features, used alone or in combination:

the noise reduction grid comprises two sets of bars, each set of bars being parallel to each other, the extension directions of the two sets of bars being perpendicular to each other. Thus, each cell of the noise reduction grid is rectangular, which is an arrangement that is relatively easy to machine. The noise reduction grid may however also comprise only two bars crossing each other or more than two sets of bars, each set being parallel to each other and crossing the bars of the other sets. The included angles of the different groups of rod pieces are not necessarily right angles, and can be arranged according to the needs.

-said support post is provided with a sliding groove, said noise reducing grid being provided with a sliding block adapted to be mounted in and slide along the sliding groove. In a simple embodiment, only one support column can be provided, with which the noise reduction grid is fitted centrally. For example, the support columns are cylindrical and are distributed uniformly along the circumference with 2 to 4 sliding grooves, and the center of the grid is provided with a corresponding number of sliding blocks and is respectively installed in the sliding grooves. In another embodiment, there are 2 to 4 support columns, for example at two opposite corners, or three to four corners of the noise reduction grid. In this arrangement, each support post is provided with only one sliding groove, and the noise-reducing grille is provided with sliding blocks at the corners facing the sliding grooves. Of course, the relative positions of the support columns and the noise reduction grids, and the number of the sliding grooves and the sliding blocks can be designed according to actual requirements and according to factors such as the shapes of the fuel tank and the noise reduction grids.

-the chute comprises a slideway and a neck, the slider being deformable to deform through the neck into the slideway under an external force and to recover within the slideway. The sliding block-sliding way matching mode is simple and easy to implement.

The noise reduction grid is made of oil-resistant plastic, i.e. has a high resistance to fuel swelling, for example made of High Density Polyethylene (HDPE) or Polytetrafluoroethylene (PTFE).

-the support columns are welded to the upper and lower inner walls of the fuel tank. Other fixing means such as bonding or riveting may be employed, but welding is preferred for the plastic fuel tank, that is, fixing the components to be welded to each other in a molten state by heating. The support columns are therefore preferably made of a plastic compatible with the plastic of the fuel tank, in order to facilitate welding. The support column can also be fixed to the fuel tank only at one end, the other end being a free end, if the strength permits. Alternatively, one end of the support column is not fixed to the wall of the fuel tank, but to other functional accessories provided in the fuel tank.

-the noise reduction grid further comprises at least one barrier mounted to the bars. The main function of the blocking piece is to block the fuel from contacting with the air in the fuel tank, namely, the surface area of the free liquid level of the fuel is reduced, and therefore the evaporation of the fuel can be reduced. And the oil gas content in the fuel tank is reduced, so that the emission of the fuel tank can be reduced. It will be understood that when the noise reduction grid includes baffles, the aforementioned "overall density" of the grid refers to the overall density of the noise reduction grid including the baffles. The overall density is approximately equal to the fuel density so that the grill with the baffle floats on the fuel level as a whole. Therefore, the blocking piece can block the fuel from contacting with the air, and can further divide the liquid level of the fuel into small liquid levels, so that the noise reduction effect is enhanced.

At least one of said barriers is snapped onto the rod and can rotate about the rod. Thus, the barrier member can be conveniently mounted with the bar member of the grille. And, the fuel hits the baffle and causes it to rotate when shaking, therefore the baffle can absorb some fuel and shake the kinetic energy that produces, and therefore reduce its noise.

For example, the barrier is spherical. The barrier may also be in the shape of other revolution, such as an ellipsoid, a spindle, etc., but a spherical barrier is convenient to manufacture.

Furthermore, the utility model discloses still relate to a motor vehicle fuel tank, its inside installation as before fall the part of making an uproar.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings. It is to be understood by those skilled in the art that these drawings are solely for purposes of illustration and are not intended as a definition of the limits of the invention. The same reference numbers in the drawings identify the same or similar elements. For purposes of illustration, the figures are not drawn to scale.

Fig. 1 is a schematic view of a noise reduction member according to an embodiment of the present invention installed in a fuel tank.

Figure 2 is a schematic top view of a noise reduction feature according to an embodiment of the present invention.

FIG. 3 is a schematic view of a sliding fit of a noise reduction grill with a support post according to one embodiment.

FIG. 4 is a schematic cross-sectional view of the noise reduction grill of FIG. 3 in sliding engagement with the support post.

Detailed Description

FIG. 1 is a schematic view of a noise reduction component 20 according to an embodiment of the present invention installed in a fuel tank 10. Fig. 1 shows a side view of a fuel tank 10, i.e. a view in the XZ plane. The fuel tank 10 is, for example, a plastic tank, and includes an upper wall 12, a lower wall 14, and side walls connecting the upper and lower walls.

The noise reduction feature 20 includes a support post 22, a noise reduction grid 24 slidably mounted to the support post 22, and a plurality of baffles 26 mounted on the noise reduction grid 24. In the illustrated embodiment, the support post 22 extends in the vertical direction, i.e., the Z-direction, and is secured at its upper and lower ends to the upper and

lower walls

12 and 14, respectively, of the fuel tank by welds, as best seen in fig. 3. It will be appreciated by those skilled in the art that the support post 22 may be secured to the interior of the fuel tank 10 in other ways, or to other components within the fuel tank 10 other than the upper and lower walls thereof.

As shown in FIG. 1, after the noise reduction module 20 is installed in the fuel tank 10, the noise reduction grill 24 is disposed along the horizontal direction (i.e., XY direction) of the fuel tank 10. Moreover, the noise reduction grill 24 has a small height in the Z direction, which does not interfere with the blow molding of the fuel tank 10.

Fig. 2 is a top view of a noise reduction grid 24 according to a preferred embodiment of the present invention, i.e. a view thereof in the XY plane. In this embodiment, the noise reduction grid 24 comprises a set of first bars 241 parallel to each other and extending in the X-direction and a set of second bars 242 parallel to each other and extending in the Y-direction. The first bars 241 and the second bars 242 cross each other, thereby forming the noise reduction grill 24. It can be understood that the noise reduction grill 24 divides the XY plane into a plurality of smaller areas by the intersection of the first bars 241 and the second bars 242, thereby preventing the fuel from generating large sloshing and thus noise over a large area. On the other hand, the area of the fuel level covered by the noise reduction grill can be set by adjusting the width, number, or overall length of the rod members. In the area covered by the noise reduction grid, the fuel is not contacted with the air in the fuel tank, so that the surface area of the free liquid level of the fuel is reduced, and the evaporation of the fuel is reduced.

It is also conceivable that the noise reduction grid comprises only two bars crossing each other, or three and more sets of bars, each set of bars being parallel to each other, the bars of the different sets crossing each other. Any way of dividing the plane into smaller areas is contemplated and determined according to the actual requirements. The support columns 22 are respectively disposed at four corners of the substantially square noise reduction grill 24, and both ends of the outermost two first bar members 241 are respectively slidably mounted to the corresponding support members 22. The manner of installation will be described in connection with fig. 3 and 4. It will be appreciated by the person skilled in the art that the position and number of the support columns relative to the noise reduction grid may be designed according to the actual requirements.

In addition, noise reduction grill 24 also includes a plurality of baffles 26 mounted on second bars 242. In this embodiment, the blocking member 26 is spherical, and they are snap-fitted to the second lever 242 and can rotate around the lever 242. However, other shapes of revolution such as ellipsoid or spindle are also conceivable by the person skilled in the art.

The noise reduction grill 24, including the first bar 241, the second bar 242 and the baffle 26, is made of an oil resistant plastic, such as HDPE, and has an overall density slightly less than or equal to the density of the fuel in the fuel tank so that it floats on the fuel level. Thus, the noise reduction grill 24 divides the fuel level into a plurality of small levels, and prevents the fuel from generating large sloshing over a large area and the resulting noise. In addition, as shown in fig. 2, the barrier 26 also further divides the fuel level into smaller levels, thereby enhancing the noise reduction effect. Moreover, the fuel hits the blocking member 26 during the shaking and rotates around the second rod 242, so that the blocking member 26 can absorb a part of the kinetic energy generated by the shaking of the fuel, thereby reducing the noise.

Meanwhile, the barrier 26 can prevent the fuel from contacting with air in the fuel tank, so that the surface area of the free liquid level of the fuel is reduced, and the evaporation of the fuel can be reduced. And the oil gas content in the fuel tank is reduced, so that the emission of the fuel tank can be reduced.

In order to enable the noise reduction grill 24 to always float on the fuel surface, even if its position can vary with the fuel level, thereby meeting the noise reduction requirements at different levels, the noise reduction grill 24 is slidably mounted on the support column. As shown in fig. 3, in one embodiment, the support column 22 comprises a slide groove 32 extending in its longitudinal direction, i.e. Z-direction, while the end of the first bar 241 of the noise reduction grid 24 is provided with a slider 34 adapted to be mounted in the slide groove 32 and to slide along the slide groove 32. As shown in fig. 4, the chute 32 includes a slide 321 and a neck 322, the neck 322 being smaller in size than the slide 321 so that the slider 34 cannot be easily removed once it is forced into the slide 321. For this purpose, the slider 34 is larger than the neck 322 and has a certain deformability, so as to be deformed by an external force to pass through the neck 322 and to be restored after entering the slide 321, so as to remain stuck in the slide groove 32 and to be able to move along the slide 321 in the Z direction. The matching of the sliding groove and the sliding block is simple and easy, but the person skilled in the art can select other matching modes capable of realizing sliding installation according to the requirement.

The drawings and the foregoing description depict non-limiting specific embodiments of the invention. For the purpose of teaching inventive principles, some conventional aspects have been simplified or omitted. Those skilled in the art will appreciate variations from these embodiments that fall within the scope of the invention. Those skilled in the art will appreciate that the above-described features can be combined in various ways to form multiple variations of the invention. Accordingly, the present invention is not limited to the specific embodiments described above, but is only limited by the claims and their equivalents.

Claims

1. A noise reduction component (20) for a motor vehicle fuel tank (10), characterized in that it comprises a support pillar (22) fixed inside the fuel tank (10) and a noise reduction grid (24) slidably mounted to said support pillar (22), said noise reduction grid (24) comprising bars extending in at least two different directions, respectively, said noise reduction grid (24) having an overall density less than or equal to the density of the fuel in said fuel tank (10) so that it can float on the fuel level.

2. Noise reduction component (20) according to claim 1, wherein said noise reduction grid (24) comprises two sets of bars, each set of bars being parallel to each other and the extension directions of the two sets of bars being perpendicular to each other.

3. Noise reduction element (20) according to claim 1, wherein said support posts (22) are provided with sliding slots (32), and the ends of said noise reduction grid (24) are provided with sliding blocks (34) adapted to be mounted in said sliding slots (32) and to slide along said sliding slots (32).

4. A noise reduction feature (20) according to claim 3 wherein the runner (32) comprises a slideway (321) and a neck (322), the slider (34) being deformable to deform under external force through the neck (322) into the slideway (321) and to recover within the slideway (321).

5. The noise reduction feature (20) of claim 1, wherein the noise reduction grid (24) is made of high density polyethylene or polytetrafluoroethylene.

6. The noise reduction component (20) of claim 1, wherein said support posts (22) are welded to upper and lower interior walls (12, 14) of said fuel tank (10).

7. A noise reduction feature (20) according to any of claims 1-6, wherein said noise reduction grid (24) further comprises at least one barrier (26) mounted to the bars (242).

8. Noise reduction part (20) according to claim 7, characterized in that at least one of said blocking members (26) is snap-fitted on the rod member (242) and can be pivoted about the rod member (242).

9. The noise reduction feature (20) of claim 7 wherein the barrier (26) is spherically shaped.

10. A motor vehicle fuel tank (10), characterized in that it internally houses a noise reduction component (20) according to any one of claims 1 to 9.