Silencer mounting structure

Abstract

To provide a mounting structure of a silencer capable of reducing cost.SOLUTION: The mounting structure of the silencer 40 includes a dash panel 30 which is a partition wall for partitioning a vehicle cabin 14 and a power unit chamber 12, and a sheet-like silencer 40 mounted on a surface 31 of the dash panel 30 on the vehicle cabin 14 side, the dash panel 30 has a mounting claw 32 protruding to the vehicle cabin 14 side, the silencer 40 has a mounting slit 42 into which the mounting claw 32 is inserted, and the mounting claw 32 has a locking part 36 hooked on a peripheral edge of the mounting slit 42 after being inserted into the mounting slit 42.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This specification discloses a structure for attaching a silencer to a dash panel that separates a vehicle interior from a power unit compartment. [Background technology]

[0002] The underside of the hood of a vehicle functions as a power unit compartment. A power source (e.g., a motor and / or an engine) is usually located in the power unit compartment. The power unit compartment and the passenger compartment are separated by a partition called a dash panel. To ensure quietness within the passenger compartment, a silencer may be attached to the dash panel. A silencer is a sheet member that has sound-absorbing or sound-insulating properties, or both.

[0003] For example, Patent Document 1 discloses a technique for attaching a silencer to a body using a specially shaped fastener. In Patent Document 1, a plurality of stud bolts are formed on the body. Then, with the silencer pressed against the body by the fastener, a part of the fastener is fitted onto the stud bolt, thereby fixing the silencer to the body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-082456 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the case of the technology of Patent Document 1, stud bolts and fasteners are required to attach the silencer, which increases the cost required to attach the silencer.

[0006] Therefore, this specification discloses a silencer mounting structure that can further reduce costs. [Means for solving the problem]

[0007] The silencer mounting structure disclosed in this specification comprises a dash panel, which is a partition separating the vehicle's passenger compartment from the power unit compartment, and a sheet-shaped silencer mounted on the passenger compartment side surface of the dash panel, wherein the dash panel has mounting claws that protrude toward the passenger compartment, the silencer has mounting slits into which the mounting claws are inserted, and the mounting claws have locking portions that hook onto the periphery of the mounting slits after being inserted into the mounting slits.

[0008] In this case, the mounting slit is a linear cut that extends from the starting end to the terminal end in a detour, and the silencer has a tongue-shaped portion surrounded by the mounting slit, and the tongue-shaped portion has a base end connected to the silencer and a tip end separated from the silencer, and may be capable of swinging around the base end as a fulcrum.

[0009] The mounting slit may also be shaped like the letter "Π" and have a horizontal line and a pair of vertical lines extending from both ends of the horizontal line.

[0010] In addition, the dash panel may have a plurality of mounting claws, the silencer may have a plurality of mounting slits corresponding to the plurality of mounting claws, the plurality of mounting claws may be arranged symmetrically on the left and right, and the plurality of mounting claws may have one or more first mounting claws whose engaging portions protrude above the base of the mounting claws, and one or more second mounting claws whose engaging portions protrude in the vehicle width direction from the base of the mounting claws.

[0011] Furthermore, the vehicle may further include a cast product in which a pair of left and right side panels and a connecting panel that connects the pair of side panels are integrally molded, and the dash panel and the mounting claws are integrally molded from resin, and the dash panel may be fixed to the connecting panel. [Effects of the Invention]

[0012] According to the technology disclosed in this specification, the silencer can be attached to the dash panel 30 without using any dedicated fastening members. As a result, the cost required for attaching the silencer can be further reduced. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 4 is a perspective view showing how the silencer is attached to the dash panel. [Figure 2] FIG. [Figure 3] FIG. 4 is a cross-sectional view of a mounting claw and a mounting slit. [Figure 4] 10A and 10B are diagrams showing another example of the silencer mounting structure. [Figure 5] 10A and 10B are diagrams showing other forms of mounting slits. [Figure 6] 10A and 10B are diagrams showing other forms of mounting claws. DETAILED DESCRIPTION OF THE INVENTION

[0014] The mounting structure of the silencer 40 will be described below with reference to the drawings. Fig. 1 is a perspective view showing how the silencer 40 is mounted to the dash panel 30. In each drawing, Fr, Up, and Rh indicate the front, top, and right side of the vehicle.

[0015] The dash panel 30 is attached to, for example, a connecting panel 22 of the cast product 10. The cast product 10 is a cast molded product made of a light metal such as aluminum. In the example of FIG. 1, the cast product 10 is a large cast molded product called a gigacast or megacast. The cast product 10 has a pair of left and right wheel arches 18, a pair of left and right side panels 16, and a connecting panel 22. A portion of the wheel arches 18 bulges inward in the vehicle width direction to form a suspension tower 20. The side panel 16 is a panel portion extending from the suspension tower 20 toward the rear of the vehicle. The side panel 16 forms a part of the side wall of the passenger compartment. The connecting panel 22 connects the pair of left and right side panels 16. The dash panel 30 is joined to this connecting panel 22.

[0016] The dash panel 30 is a partition wall that separates the power unit compartment 12 from the passenger compartment 14. The space in front of the dash panel 30 is the power unit compartment 12, and the space in rear of the dash panel 30 is the passenger compartment 14. In the power unit compartment 12, on-board components such as a power unit (e.g., a motor or an engine) and a heat exchanger are disposed. In other words, various on-board components are disposed in the power unit compartment 12. Therefore, in the power unit compartment 12, loud noises are generated as these on-board components are driven.

[0017] As described above, the dash panel 30 is joined to the connecting panel 22 to separate the power unit compartment 12 from the passenger compartment 14. The dash panel 30 is a molded product made of resin. In FIG. 1, the dash panel 30 is illustrated as a flat rectangle with no irregularities other than the mounting claws 32. However, in reality, the surface of the dash panel 30 has multiple irregularities, and the outer shape of the dash panel 30 is changed as appropriate depending on the shape of the cast product 10, etc.

[0018] As shown in FIG. 1, a plurality of mounting claws 32 are formed on the surface of dash panel 30 facing the passenger compartment 14 (hereinafter referred to as "first surface 31"). Mounting claws 32 are portions that protrude from first surface 31 toward the passenger compartment 14. These mounting claws 32 are molded integrally with dash panel 30. Details of these mounting claws 32 will be described later.

[0019] A silencer 40 is placed on and fixed to the first surface 31 of the dash panel 30. The silencer 40 is attached to the dash panel 30 to improve the quietness of the passenger compartment 14. That is, as described above, when the vehicle is driven, a large noise is generated in the power unit compartment 12. If this noise is transmitted to the passenger compartment 14, the quietness of the passenger compartment 14 will be impaired. Therefore, the silencer 40 is attached to the dash panel 30.

[0020] Silencer 40 is sheet-shaped and made of sound-absorbing material, sound-insulating material, or a combination of these. The sound-absorbing material is made of a porous material such as glass wool, rock wool, or urethane foam. The sound-insulating material is made of a high-specific-gravity material such as synthetic resin, rubber, iron powder, or barium sulfate. By attaching such silencer 40 to dash panel 30, noise generated in power unit compartment 12 is effectively prevented from being transmitted to passenger compartment 14, thereby improving the quietness of passenger compartment 14. Such silencer 40 has a thickness of, for example, about 3 mm to 30 mm, and is flexible enough to be easily bent by hand.

[0021] Additionally, a plurality of mounting slits 42 are formed in the silencer 40. The mounting claws 32 of the dash panel 30 are inserted into these mounting slits 42, thereby mounting the silencer 40 to the dash panel 30. The configuration of these mounting slits 42 and mounting claws 32 will now be described with reference to Figures 2 and 3. Figure 2 is a perspective view of the mounting claws 32 and mounting slits 42. Figure 3 is a cross-sectional view of the mounting claws 32 and mounting slits 42.

[0022] As shown in FIG. 2, the mounting claw 32 is broadly divided into an arm portion 34 and a locking portion 36. The arm portion 34 extends horizontally from the first surface 31. The locking portion 36 extends upward from the end of the arm portion 34. Therefore, the cross-sectional shape of the mounting claw 32 resembles an "L" lying on its side. The locking portion 36 is approximately rectangular in front view. The upper corners of the locking portion 36 are rounded. The length of the arm portion 34, in other words, the distance from the first surface 31 to the locking portion 36, is approximately the same as the thickness of the silencer 40.

[0023] An attachment slit 42 is formed in the silencer 40 at a position facing the attachment claw 32. The attachment slit 42 is a linear cut formed in the silencer 40. In this example, the attachment slit 42 is composed of a horizontal line La extending in the vehicle width direction and vertical lines Lb extending downward from both ends of the horizontal line La. In other words, the attachment slit 42 is shaped like the letter "Π" that opens downward. In other words, the attachment slit 42 is a linear cut that runs from a starting point 44 to a terminal point 46 in a detour. In this case, the area surrounded by the attachment slit 42 becomes a tongue-shaped portion 50. Only the lower end of the tongue-shaped portion 50 is connected to the silencer 40, and the tongue-shaped portion 50 can swing around the lower end as a fulcrum.

[0024] As described above, the mounting slit 42 is a linear cut. Therefore, when the tongue-shaped portion 50 is positioned on the same plane as the silencer 40, as shown in the upper part of Fig. 2 and the upper part of Fig. 3, the "line" that constitutes the mounting slit 42 exists, but the "hole" does not exist. On the other hand, the mounting slit 42 is shaped like the letter "Π" that is wide in both the vertical direction, and therefore forms a swingable tongue-shaped portion 50. Then, by swinging the tongue-shaped portion 50, the hole 52 that is wide in both the vertical direction is formed.

[0025] When attaching the silencer 40 to the dash panel 30, the tongue-shaped portion 50 is pressed against the mounting claw 32. This causes the tongue-shaped portion 50 to bend toward the front of the vehicle, forming a hole 52 in the silencer 40 through which the mounting claw 32 can pass. The lower half of FIG. 2 and the lower half of FIG. 3 show the state in which the locking portion 36 of the mounting claw 32 has passed through this hole 52. As shown in the figures, in this state, the silencer 40 is sandwiched between the first surface 31 and the locking portion 36. In other words, the locking portion 36 is caught on the periphery of the mounting slit 42. This prevents the silencer 40 from separating from the dash panel 30. At this time, an elastic restoring force acts on the tongue-shaped portion 50 in an obliquely upward direction. This causes the tongue-shaped portion 50 to come into contact with the lower end of the mounting claw 32. As a result, when viewed from the passenger compartment side, the hole 52 formed in the silencer 40 is almost completely hidden by the engaging portion 36 and the tongue-shaped portion 50. This reduces noise transmitted from the power unit compartment 12 to the passenger compartment 14, improving the quietness of the passenger compartment 14.

[0026] Furthermore, as is clear from the above description, according to this example, when attaching the silencer 40 to the dash panel 30, the worker simply aligns the attachment slits 42 with the attachment claws 32 and presses the silencer 40 against the dash panel 30. In other words, no special tools or fastening members are required to attach the silencer 40. This simplifies the installation work of the silencer 40.

[0027] Furthermore, the mounting claws 32 are molded integrally with the resin dash panel 30. In other words, in this example, no stud bolts or clips are required to mount the silencer 40. This reduces the number of parts required to mount the silencer 40, thereby reducing costs.

[0028] 1, the multiple mounting claws 32 have the same configuration. Also, the multiple mounting slits 42 have the same configuration. However, if necessary, some of the mounting claws 32 or some of the mounting slits 42 may have a different configuration from the other mounting claws 32 or other mounting slits 42.

[0029] Fig. 4 is a diagram showing another example of the mounting structure of the silencer 40. The upper part of Fig. 4 is a diagram showing the dash panel 30 as viewed from the passenger compartment 14, and the lower part of Fig. 4 is a diagram showing the silencer 40 as viewed from the passenger compartment 14. As shown in Fig. 4, the dash panel 30 may have a second mounting claw 32s as viewed from the side in addition to the upward-facing first mounting claw 32f. In this case, both the first mounting claw 32f and the second mounting claw 32s have an arm portion 34 and a locking portion 36. However, the first mounting claw 32f and the second mounting claw 32s are mounted in different directions.

[0030] That is, the thickness direction of the arm portion 34 of the first mounting claw 32f is parallel to the up-down direction, and the locking portion 36 extends upward from the end of the arm portion 34. On the other hand, the thickness direction of the arm portion 34 of the second mounting claw 32s is parallel to the vehicle width direction, and the locking portion 36 extends outward in the vehicle width direction from the end of the arm portion 34.

[0031] The silencer 40 has a first mounting slit 42f and a second mounting slit 42s. The first mounting slit 42f is formed in a position facing the first mounting claw 32f. The first mounting slit 42f is a "Π"-shaped cut that opens downward. The second mounting slit 42s is formed in a position facing the second mounting claw 32s. The second mounting slit 42s is a linear cut that extends in the vertical direction.

[0032] In this way, by providing the sideways second mounting claws 32s in addition to the upward first mounting claws 32f, movement of the silencer 40 in the left-right direction is restricted, and the silencer 40 can be more stably fixed to the dash panel 30. Furthermore, by forming the second mounting slits 42s as linear cuts, movement of the silencer 40 in the left-right direction is more reliably prevented. Note that, as shown in FIG. 4, the multiple mounting claws 32f, 32s may be arranged symmetrically. By arranging them symmetrically, rattling of the silencer 40 can be more reliably prevented.

[0033] Next, other configurations of the mounting slit 42 will be described with reference to FIG. 5. The shapes of the mounting slit 42 described so far are all examples. The mounting slit 42 may be modified as appropriate as long as the mounting claw 32 can be inserted therein. For example, as shown in the first row of FIG. 5, the mounting slit 42 may be a substantially V-shaped cut. Furthermore, the lines that make up the cut may be curved, and for example, as shown in the second row of FIG. 5, the mounting slit 42 may be an arc-shaped cut.

[0034] Furthermore, the mounting slit 42 is not limited to a cut, and may be an elongated hole as shown in the third row of FIG. 5. In this case, the width of the hole is the same as or slightly larger than the thickness of the arm portion 34 of the mounting claw 32. Furthermore, if the mounting slit 42 has a tongue-shaped portion 50, pulling the tongue-shaped portion 50 strongly may cause a cut to progress at the start end 44 and end end 46 of the mounting slit 42. Therefore, as shown in the fourth row of FIG. 5, the lines of the start end 44 and end end 46 of the mounting slit 42 may be U-turned. With this configuration, the cut will not progress even if the tongue-shaped portion 50 is pulled strongly.

[0035] In the above description, the locking portion 36 is a flat plate with a constant thickness. However, the locking portion 36 may have other shapes as long as it can hook onto the periphery of the mounting slit 42. For example, the locking portion 36 may be hook-shaped as shown in FIG. 6 . That is, the locking portion 36 may have an inclined surface 37 that inclines away from the first surface 31 as it approaches the downstream side in the insertion direction. Providing such an inclined surface 37 can reduce resistance when inserting the mounting claw 32 into the mounting slit 42. As a result, the silencer 40 can be more easily attached to the dash panel 30.

[0036] Furthermore, the materials of the dash panel 30 and the silencer 40 are not limited to those described above. Therefore, for example, the dash panel 30 is not limited to resin, and may be made of other materials, such as light metal. Furthermore, the mounting claws 32 may be separate components that can be separated from the dash panel 30. In the above description, the dash panel 30 is joined to the connecting panel 22 of the cast product 10. However, the dash panel 30 may be fixed to another member as long as it stands at the boundary between the power unit compartment 12 and the passenger compartment 14. [Explanation of symbols]

[0037] 10 Cast product, 12 Power unit compartment, 14 Vehicle compartment, 16 Side panel, 18 Wheel arch, 20 Suspension tower, 22 Connecting panel, 30 Dash panel, 31 First surface, 32 Mounting claw, 34 Arm portion, 36 Locking portion, 37 Inclined surface, 40 Silencer, 42 Mounting slit, 44 Starting end, 46 Ending end, 50 Tongue-shaped portion, 52 Hole, La Horizontal line, Lb Vertical line.

Claims

1. a dash panel which is a partition separating a passenger compartment and a power unit compartment of the vehicle; a sheet-shaped silencer attached to a surface of the dash panel facing the passenger compartment; Equipped with The dash panel has mounting claws that protrude toward the passenger compartment, The silencer has an attachment slit into which the attachment claw is inserted, The mounting claw has a locking portion that is hooked onto the periphery of the mounting slit after being inserted into the mounting slit. A silencer mounting structure characterized by:

2. The silencer mounting structure according to claim 1, The mounting slit is a linear cut that extends from a starting end to a terminal end in a roundabout manner, The silencer has a tongue-shaped portion surrounded by the mounting slit, The tongue-shaped portion has a base end connected to the silencer and a tip end separated from the silencer, and is swingable around the base end as a fulcrum. A silencer mounting structure characterized by:

3. The silencer mounting structure according to claim 2, The mounting slit is shaped like the letter "Π" and has a horizontal line and a pair of vertical lines extending from both ends of the horizontal line. A silencer mounting structure characterized by:

4. The silencer mounting structure according to claim 1, The dash panel has a plurality of the mounting claws, the silencer has a plurality of mounting slits corresponding to the plurality of mounting claws, The plurality of mounting claws are arranged symmetrically, The plurality of mounting claws are one or more first attachment claws, each having a locking portion projecting upward from a base of the attachment claw; one or more second mounting claws, the engaging portions of which protrude in the vehicle width direction from the bases of the mounting claws; It has A silencer mounting structure characterized by:

5. The silencer mounting structure according to claim 1, Furthermore, the present invention includes a cast product in which a pair of left and right side panels and a connecting panel that connects the pair of side panels are integrally molded, The dash panel and the mounting claws are integrally molded from resin, The dash panel is fixed to the connecting panel. A silencer mounting structure characterized by:

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