CN215285021U

CN215285021U - Floor silencer

Info

Publication number: CN215285021U
Application number: CN202120752752.9U
Authority: CN
Inventors: 菅仁志
Original assignee: Toyota Motor Corp
Current assignee: Toyota Motor Corp
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2021-12-24
Anticipated expiration: 2031-04-13

Abstract

The utility model provides a floor silencer. The floor silencer is provided between a floor panel of a vehicle and a floor carpet covering an upper surface of the floor panel, and includes a main body portion and a vibration damping portion, wherein the main body portion has a panel facing surface facing the floor panel and a carpet facing surface facing the floor carpet, the vibration damping portion is provided on at least one of the panel facing surface and the carpet facing surface, the vibration damping portion has a plurality of vibration absorbing layers stacked in an up-down direction, and each vibration absorbing layer has a plurality of convex portions made of elastic members arranged at intervals from each other. Based on the above structure of the utility model, can absorb the vibration that transmits floor carpet from floor panel effectively to simple structure, cost are low.

Description

Floor silencer

Technical Field

The utility model relates to a floor silencer that vehicle was used.

Background

In general, a floor of a vehicle includes a floor panel composed of a steel plate or the like, and a floor carpet laid on the floor panel, the floor carpet having a fiber layer. In many vehicles, a floor muffler made of urethane foam or the like is disposed between a floor panel and a floor carpet to absorb vibration transmitted from the floor panel into the vehicle compartment, thereby improving the sound-deadening performance in the vehicle compartment.

However, the floor silencer using polyurethane foam or the like in the prior art is not only high in cost and complex in structure, but also limited in silencing effect.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a floor silencer which can reduce the cost and simplify the structure, and can absorb the vibration from the floor panel more effectively.

As a technical scheme who solves above-mentioned technical problem, the utility model provides a floor silencer, this floor silencer setting possess main part and damping portion, its characterized in that between the floor panel of vehicle and the floor carpet with the upper surface covering of this floor panel: the main body portion has a face-facing surface facing the floor panel and a carpet-facing surface facing the floor carpet, the vibration damping portion is provided on at least one of the face-facing surface and the carpet-facing surface, the vibration damping portion has a plurality of vibration absorbing layers stacked in a vertical direction, and each of the vibration absorbing layers has a plurality of convex portions made of an elastic member arranged at intervals from each other.

In addition, in the above-mentioned floor silencer of the present invention, preferably, the convex portion has a quadrangular pyramid shape. In this case, the side surfaces of the four sides of the convex portion may be respectively formed by a plurality of inclined surfaces which are continuous in the vertical direction, and the plurality of inclined surfaces may be formed such that the inclination angle with respect to the bottom surface of the convex portion is larger as the inclined surfaces are located more upward.

In the above floor muffler of the present invention, the convex portion may include a quadrangular frustum-shaped mounting portion and a rectangular parallelepiped-shaped contact portion formed on a top surface of the mounting portion.

In the floor muffler according to the present invention, it is preferable that the plurality of vibration absorbing layers are formed such that the arrangement density of the convex portions in each layer is different from each other.

Drawings

Fig. 1 is a schematic cross-sectional view showing a structure of a vehicle floor provided with a floor muffler according to a first embodiment of the present invention.

Fig. 2 is a schematic perspective view showing an external appearance of the floor muffler of the first embodiment.

Fig. 3 is a partially enlarged sectional view showing a vibration reduction portion of the floor muffler in fig. 2 in an enlarged manner.

Fig. 4(a) is a perspective view showing a convex portion in a floor muffler according to a second embodiment of the present invention.

Fig. 4(b) is a longitudinal sectional view of a convex portion in a floor muffler according to a second embodiment of the present invention.

Fig. 5 is a schematic perspective view showing a convex portion in a floor muffler according to a third embodiment of the present invention.

Detailed Description

Hereinafter, a floor silencer according to each embodiment of the present invention will be described with reference to the drawings.

< first embodiment >

First, the structure of the floor muffler of the present embodiment will be explained. Fig. 1 is a schematic cross-sectional view showing a structure of a vehicle floor F provided with a floor muffler S of the present embodiment. As shown in fig. 1, the vehicle floor F includes a floor panel 2, a floor carpet 3, and a floor muffler S.

The floor panel 2 is a floor member constituting a part of the vehicle floor F, and is produced by press working or the like a metal plate material such as a plated steel sheet or a laminated steel sheet. As shown in fig. 1, the floor panel 2 is provided with a first tunnel portion 4, a part of which is raised upward, and the first tunnel portion 4 is provided to avoid an exhaust pipe or the like, not shown.

The floor carpet 3 is produced by pressing a nonwoven fabric made of synthetic fibers such as polyester, nylon, and polypropylene. As shown in fig. 1, a second tunnel part 5 which is raised upward and overlaps the first tunnel part 4 is formed in a portion of the floor carpet 3 corresponding to the first tunnel part 4 of the floor panel 2.

The floor muffler S is manufactured by molding RSPP (recycled Sound absorbing Pr oofing Products) and the like containing polyurethane foam and fibers recovered from crushed dust of a waste vehicle. Fig. 2 is a schematic perspective view showing an external appearance of the floor muffler S according to the present embodiment. As shown in fig. 2, the floor muffler S includes a main body 1 and a vibration damping part 8. The upper surface of the main body 1 faces the floor carpet 3, referred to herein as the carpet facing surface 6; the lower surface of the main body 1 faces the floor panel 2, referred to herein as the panel facing surface 7. The vibration damping portion 8 is provided on the carpet facing surface 6.

The floor muffler S is disposed between the floor panel 2 and the floor carpet 3, and the main body 1 thereof has a third tunnel part 9 that bulges upward and overlaps the first tunnel part 4 and the second tunnel part 5.

The vibration damping portion 8 plays a role of reducing vibration transmitted from the floor panel 2 to the floor carpet 3. Fig. 3 is a partially enlarged sectional view showing the vibration attenuating portion 8 in an enlarged manner. As shown in fig. 3, the vibration damping section 8 includes a first absorbing layer 10 provided on the carpet-facing surface 6, a second absorbing layer 11 laminated on the first absorbing layer 10, and a separator 12 disposed between the first absorbing layer 10 and the second absorbing layer 11.

The first absorption layer 10 is configured by disposing a plurality of projections 13 made of an elastic member on the carpet facing surface 6 at predetermined intervals. Each of the convex portions 13 has a quadrangular pyramid shape (see fig. 2), and has a bottom surface 14 joined to the carpet-facing surface 6 and a vertex 15 abutting against the partition plate 12.

The second absorbent layer 11 is formed by disposing a plurality of projections 13 made of an elastic member on the separator 12 at predetermined intervals (at a predetermined density). Each of the protrusions 13 has a quadrangular pyramid shape, and has a bottom face 14 joined to the partition plate 12 and a vertex 15 abutting against the floor carpet 3. Here, the second absorption layer 11 is configured such that the shape and size of the projections 13 are the same as those of the first absorption layer 10, but the arrangement density of the projections 13 is lower than that of the first absorption layer 10 (see fig. 3).

Next, the operation and effect of the floor muffler S of the present embodiment will be described. According to the floor muffler S of the present embodiment, when the floor panel 2 vibrates due to the traveling of the vehicle or the like, the convex portion 13 of the first absorption layer 10 is compressed and deformed in the vertical direction by the action of the force from the floor panel 2; when the force from the floor panel 2 disappears, the convex portion 13 of the first absorption layer 10 is restored to its original shape. In this way, by the deformation of the convex portion 13, a part of the vibration of the floor panel 2 is absorbed, and the vibration transmitted from the floor panel 2 to the floor carpet 3 can be reduced.

Meanwhile, the second absorption layer 11 is laminated on the first absorption layer 10 via the separator 12. Thus, when the convex portions 13 of the second absorption layer 11 are subjected to the acting force through the partition plate 12, they are compressively deformed in the up-down direction; when the force from the separator 12 disappears, the convex portions 13 of the second absorption layer 11 return to their original shape. In this way, by the deformation of the convex portion 13, a part of the vibration of the floor panel 2 is absorbed, and the vibration transmitted from the floor panel 2 to the floor carpet 3 can be further reduced.

Further, since the convex portions 13 of the first and second

absorbent layers

10 and 11 have a quadrangular pyramid shape, each convex portion 13 abuts only the apex 15 thereof against the partition plate 12 or the floor carpet 3. Therefore, the contact area of each convex portion 13 with the partition plate 12 and the floor carpet 3 is small, and the force is concentrated on the apex 15 of each convex portion 13. This makes the convex portion 13 easily deformed, and the first absorption layer 10 and the second absorption layer 11 can effectively absorb the vibration of the floor panel 2.

Since the arrangement density of the projections 13 of the second absorbent layer 11 is lower than the arrangement density of the projections 13 of the first absorbent layer 10, the ratio of the acting force received by each projection 13 on the second absorbent layer 11 is larger than that on the first absorbent layer 10. In this way, even if the force transmitted to the second absorption layer 11 through the partition plate 12 is reduced, the convex portions 13 on the second absorption layer 11 can be deformed, and the second absorption layer 11 can sufficiently exhibit the function of absorbing vibration.

The technical scope of the present invention is not limited to the description of the embodiment, and various modifications can be made within the scope described in the claims. For example, the following modifications can be made to the present embodiment.

In the present embodiment, the vibration damping portion 8 is provided to protrude upward from the carpet facing surface 6 of the floor muffler S. However, the vibration damping portion 8 may be provided on at least one of the face plate facing surface 7 and the carpet facing surface 6. That is, the vibration damping portions 8 may be provided only on the panel facing surface 7, or the vibration damping portions 8 may be provided on both the panel facing surface 7 and the carpet facing surface 6, and in this case, the vibration transmitted from the floor panel 2 to the floor carpet 3 can be more effectively reduced because the number of the vibration damping portions 8 is increased.

In the present embodiment, the vibration damping portions 8 are provided only in regions on both right and left sides of the third tunnel portion 9 in the carpet facing surface 6 of the floor muffler S. However, the term "carpet facing surface" in the present invention means the entire upper surface of the main body 1 of the floor silencer S facing the floor carpet 3. Therefore, the vibration attenuating portion 8 may be provided at the ceiling portion of the third tunnel portion 9.

In the present embodiment, the arrangement density of the projections 13 of the first absorption layer 10 is higher than the arrangement density of the projections 13 of the second absorption layer 11. However, the arrangement density of the projections 13 of the first absorption layer 10 may be lower than the arrangement density of the projections 13 of the second absorption layer 11. However, increasing the arrangement density of the convex portions 13 of the first absorption layer 10 located on the lower side is advantageous in improving the stability of the entire structure of the vibration damping portion 8 and the vibration absorption effect.

In the present embodiment, the vibration damping portion 8 is configured such that the first absorption layer 10 and the second absorption layer 11 are stacked in the vertical direction. However, the vibration damping section 8 is not limited to the two-layer structure, and may be a structure in which three or more absorption layers are stacked in the vertical direction. In this case, for example, a third absorption layer may be stacked on the second absorption layer 11, and the arrangement density of the projections 13 of the third absorption layer may be made lower than that of the second absorption layer 11.

In the present embodiment, the convex portions 13 of the first and second absorption layers 10 and 11 have a quadrangular pyramid shape. However, the shape of the convex portion 13 is not limited and may be arbitrarily modified, and for example, the convex portion 13 may be formed in a shape of a truncated cone, a cylinder, a tower, a pyramid, a prism, a hemisphere, or the like.

In the present embodiment, the floor muffler S is configured as a separate component from the floor carpet 3. However, the floor muffler S may be formed integrally with the floor carpet 3.

The modification of the first embodiment described above is also applicable to other embodiments described below.

< second embodiment >

Next, the structure of a floor muffler according to a second embodiment of the present invention will be described. The floor muffler of the present embodiment differs from the floor muffler S of the first embodiment only in the shape of the convex portion 16, and the structure of the other portions is the same as that of the first embodiment, and therefore, the description thereof is omitted here and the same reference numerals as those of the first embodiment are used.

Fig. 4(a) is a schematic perspective view showing the convex portion 16 of the floor muffler according to the second embodiment. Fig. 4(b) is a longitudinal sectional view of the convex portion 16 of the floor muffler. As shown in fig. 4(a), the convex portion 16 of the present embodiment has a substantially quadrangular pyramid-shaped outer shape, but, unlike the convex portion 13 of the first embodiment, the convex portion 16 has four side surfaces on the periphery thereof, that is, four side surfaces 18 surrounding the quadrangular bottom surface 17, each having a bent portion 19. That is, as shown in fig. 4(b), the side surface 18 is configured such that a first inclined surface 20 inclined at an inclination angle θ 1 with respect to the bottom surface 17 and a second inclined surface 21 inclined at an inclination angle θ 2 with respect to the bottom surface 17 are connected at the bent portion 19. The tilt angle θ 1 and the tilt angle θ 2 are set so that θ 1 < θ 2. That is, the side surface 18 is constituted by the second inclined surface 21 and the first inclined surface 20 which are vertically continuous with each other at the bent portion 19.

The floor muffler according to the present embodiment can obtain the following effects in addition to the same effects as those of the floor muffler S according to the first embodiment.

In the convex portion 16 of the present embodiment, since the four side surfaces 18 are each formed with the bent portion 19, stress is easily concentrated on the bent portion 19. Further, since the first inclined surface 20 having the small inclination angle θ 1 and the second inclined surface 21 having the large inclination angle θ 2 are connected to each other at the bent portion 19, the bent portion 19 is formed as a concave portion that is concave inward at the side surface 18. Therefore, when the convex portion 16 receives a force from the floor panel 2, it is relatively easily compressed and deformed in the vertical direction.

In the present embodiment, the side surface 18 of the convex portion 16 is formed by the first inclined surface 20 and the second inclined surface 21, but the number of inclined surfaces forming the side surface 18 is not limited to two, and the side surface 18 may be formed by connecting three or more inclined surfaces up and down. In this case, it is preferable that the inclination angle of the inclined surface is larger as the inclined surface is closer to the apex 22 (located more upward) of the convex portion 16, so that the convex portion 16 can be easily deformed.

< third embodiment >

Next, the structure of a floor muffler according to a third embodiment of the present invention will be described. The floor muffler of the present embodiment differs from the floor muffler S of the first embodiment only in the shape of the convex portion 23, and the configuration of the other portions is the same as that of the first embodiment.

Fig. 5 is a schematic perspective view showing a convex portion 23 of a floor muffler according to a third embodiment. As shown in fig. 5, the convex portion 23 of the present embodiment includes a quadrangular frustum-shaped mounting portion 24 and a rectangular parallelepiped contact portion 25 formed on the top surface of the mounting portion 24. In the convex portion 23 configured as described above, when the attachment portion 24 is attached to the carpet facing surface 6, the panel facing surface 7, or the partition plate 12, the abutting portion 25 abuts against the floor carpet 3, the floor panel 2, or the partition plate 12 facing thereto.

Since the rectangular parallelepiped contact portion 25 is formed in the upper half of the convex portion 23 of the present embodiment, the contact area with the floor carpet 3, the floor panel 2, or the partition plate 12 can be increased as compared with the convex portion 13 of the first embodiment. Therefore, the convex portion 23 can stably support the floor carpet 3 and the like, and the convex portion 23 and the floor carpet 3 and the like are not easily displaced from each other.

Claims

1. A floor muffler is provided between a floor panel of a vehicle and a floor carpet covering an upper surface of the floor panel, and includes a main body portion and a vibration damping portion, and is characterized in that:

the main body portion has a panel-facing surface facing the floor panel and a carpet-facing surface facing the floor carpet,

the vibration damping portion is provided on at least one of the face plate facing surface and the carpet facing surface,

the vibration damping section has a plurality of vibration absorbing layers stacked in the vertical direction,

each of the vibration absorbing layers has a plurality of projections made of an elastic member arranged at intervals from each other.

2. The floor muffler of claim 1, wherein:

the convex part is in a shape of a quadrangular pyramid.

3. The floor muffler of claim 2, wherein:

the side surfaces of the periphery of the convex part are respectively composed of a plurality of inclined surfaces which are connected in the vertical direction,

the plurality of inclined surfaces are configured such that the inclination angle with respect to the bottom surface of the convex portion increases as the inclined surfaces are located more upward.

4. The floor muffler of claim 1, wherein:

the convex portion includes a quadrangular frustum-shaped mounting portion and a rectangular parallelepiped-shaped contact portion formed on a top surface of the mounting portion.

5. The floor muffler of any one of claims 1 to 4, wherein:

the plurality of vibration absorbing layers are configured such that the arrangement density of the convex portions of each layer is different from each other.