Sound insulation and heat dissipation cover

Abstract

A sound-insulating heat-dissipating cover (1) that covers an object (2) is provided with: sound-absorbing heat-dissipating fins (3) that have a covering surface (10) that covers the surface of the object (2), and a heat-dissipating surface (11) on the side facing the covering surface (10); and a reinforcing member (4) that covers the sound-absorbing heat-dissipating fins (3) from the heat-dissipating surface (11) side of the sound-absorbing heat-dissipating fins (3), the sound-absorbing heat-dissipating fins (3) further comprising: a pair of first attachment parts (13); and a heat dissipation region formed between the pair of first attachment parts (13), a plurality of ridges (15) arranged at intervals are formed on the heat dissipation surface (11) of the heat dissipation region (14) of the sound-absorbing heat dissipation sheet (3), and the reinforcing member (4) is provided with: a pair of second attachment parts (21) attached to the pair of first attachment parts (13), respectively; and a bridge section (22) that bridges the pair of second attachment sections (21) and that has a plurality of through-holes (31), the plurality of ridges (15) of the sound-absorbing heat-dissipating sheet (3) being in contact with the bridge section (22) of the reinforcing member (42).

Description

Technical Field

[0001] The invention relates to a sound insulation and heat dissipation cover. Background Art

[0002] As described in Patent Document 1, it is known to install a soundproof cover on a driving source of a vehicle. Patent Document 1 describes a soundproof cover that covers an object. The soundproof cover includes: a sound absorbing sheet formed into a planar shape from a sound absorbing material and covering the surface of the object; and a reinforcing member that positions the sound absorbing sheet relative to the object.

[0003] The reinforcing member positions the sound absorbing sheet on the object in a state where at least a portion of the sound absorbing sheet is exposed. Thus, when the object generates heat, the heat generated from the object is transferred to the sound absorbing sheet and further diffused to the outside from the portion of the sound absorbing sheet exposed to the outside. Thus, the heat dissipation of the object can be improved.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: International Publication No. 2022 / 124113 Summary of the invention

[0007] Problems to be solved by the invention

[0008] According to the above technology, for example, when the soundproof cover is mounted on a large object from below, depending on the usage conditions, the portion of the sound absorbing sheet exposed from the reinforcing member hangs downward due to gravity, and there is a risk of a gap being formed between the object and the sound absorbing sheet. As a result, the air layer formed in the gap between the object and the sound absorbing sheet fills the object with heat, and there is a risk of reducing the heat dissipation of the object.

[0009] The present invention has been made in view of the above background, and an object of the present invention is to provide a sound-insulating heat-dissipating cover having improved heat-dissipating performance.

[0010] Means used to solve problems

[0011] One aspect of the present disclosure is a sound insulation and heat dissipation cover that covers an object, wherein the sound insulation and heat dissipation cover comprises:

[0012] a sound absorbing heat sink formed of a first sound absorbing material into a planar shape and having a covering surface for covering the surface of the object and a heat dissipation surface on the side opposite to the covering surface; and

[0013] a reinforcing member, which is formed of a material having a greater hardness than the first sound absorbing material, and covers the sound absorbing fin from the heat dissipation surface side of the sound absorbing fin,

[0014] The sound absorbing heat sink also has:

[0015] a pair of first mounting portions formed at positions along the cover surface close to both ends in the first direction; and

[0016] a heat dissipation region formed between the pair of first mounting portions,

[0017] A plurality of protrusions arranged at intervals are formed on the heat dissipation surface of the heat dissipation area of ​​the sound absorbing heat sink.

[0018] The reinforcing member comprises:

[0019] a pair of second mounting portions, which are formed at positions close to both ends in the first direction and are respectively mounted on the pair of first mounting portions; and

[0020] a bridging portion that bridges the pair of second mounting portions and has a plurality of through holes,

[0021] In a state where the pair of second mounting portions of the reinforcing member are mounted to the pair of first mounting portions of the sound absorbing fin, the plurality of protrusions of the sound absorbing fin abut against the bridge portion of the reinforcing member.

[0022] Effects of the Invention

[0023] According to one embodiment of the present disclosure, a plurality of protrusions of the sound-absorbing heat sink abut against the bridging portion of the reinforcing member, whereby the plurality of protrusions of the sound-absorbing heat sink are supported by the bridging portion of the reinforcing member. Thus, the sound-absorbing heat sink is prevented from deforming into a convex shape in the direction from the covering surface toward the heat dissipation surface. As a result, the covering surface of the sound-absorbing heat sink can be prevented from being flexed and deformed in a manner away from the object, thereby preventing a gap from being formed between the object and the covering surface of the sound-absorbing heat sink. Thus, the heat generated from the object is quickly conducted to the sound-absorbing heat sink, thereby improving the heat dissipation performance of the sound insulation heat dissipation cover.

[0024] In addition, the reference numerals in parentheses described in the claims indicate the corresponding relationship with the specific means described in the embodiments described later, and do not limit the technical scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a side view showing a state where the sound insulation and heat dissipation cover according to the first embodiment is attached to an object.

[0026] Figure 2 2 is a diagram showing a sound insulation and heat dissipation cover according to a first embodiment. Figure 2 (a) is a top view. Figure 2 (b) is the main view. Figure 2 (c) in the figure is the right side view.

[0027] Figure 3 FIG. 1 is a diagram showing a sound absorbing heat sink according to a first embodiment. Figure 3 (a) is a top view. Figure 3 (b) in the figure is the front view.

[0028] Figure 4 1 is a diagram showing a reinforcing member according to a first embodiment. Figure 4 (a) is a top view. Figure 4 (b) in the figure is the front view.

[0029] Figure 5 Yes means Figure 2 A partial enlarged front view of area R.

[0030] Figure 6 This is a partially enlarged cross-sectional view showing a state before a reinforcement member is attached to the sound absorbing fin of the first embodiment.

[0031] Figure 7 This is a partially enlarged cross-sectional view showing a state where a reinforcement member is attached to the sound absorbing fin of the first embodiment.

[0032] Figure 8 It is a partially enlarged cross-sectional view showing a state where the sound insulation and heat dissipation cover according to the first embodiment is attached to an object.

[0033] Fig. 9 This is a partially enlarged cross-sectional view showing a state before a reinforcement member is attached to the sound absorbing fin of the second embodiment.

[0034] Fig.10 This is a partially enlarged cross-sectional view showing a state where a reinforcement member is attached to the sound absorbing fin according to the second embodiment.

[0035] Fig.11 This is a partially enlarged cross-sectional view showing a state before a reinforcement member is attached to the sound absorbing fin of the third embodiment.

[0036] Fig.12 It is a partially enlarged cross-sectional view showing a state where the sound insulation and heat dissipation cover according to the third embodiment is attached to an object.

[0037] Fig.13 This is a partially enlarged cross-sectional view showing a state where a reinforcing member is attached to the sound absorbing fin of the fourth embodiment.

[0038] Fig.14 The fifth embodiment of the sound insulation and heat dissipation cover is shown. Figure 2 A partial enlarged front view of the area corresponding to area R.

[0039] Fig.15 The sixth embodiment of the sound insulation and heat dissipation cover is shown. Figure 2A partial enlarged front view of the area corresponding to area R.

[0040] Fig.16 A sound insulation heat dissipation cover showing a modified example of the sixth embodiment Figure 2 A partial enlarged front view of the area corresponding to area R. DETAILED DESCRIPTION

[0041] (First Embodiment)

[0042] 1. Basic structure of the sound insulation heat dissipation cover 1

[0043] Reference Figure 1 , Figure 3 as well as Figure 4 The basic structure of the sound insulation and heat dissipation cover 1 is described. The sound insulation and heat dissipation cover 1 covers the object 2, and has the function of suppressing the transmission of the sound generated by the object 2 to the outside, and the function of dissipating the heat of the object 2 to the outside. The object 2 is, for example, a power source of a vehicle. As the power source, there are a vehicle drive motor, a vehicle drive engine, etc.

[0044] Here, in Figure 1 In FIG. 1 , the case where the object 2 is a driving motor of a vehicle is shown. Figure 1 The driving motor has a cylindrical outer peripheral surface. However, the outer peripheral surface of the driving motor is not limited to a cylindrical surface, and may be appropriately formed into a concave-convex shape.

[0045] In the present embodiment, the drive motor is arranged so that the rotation axis of the drive motor coincides with the left-right direction of the vehicle. Figure 1 The left side is the front of the vehicle, and the right side is the rear of the vehicle. The front surface of the driving motor becomes a region that can directly receive air flow when the vehicle is running. In addition, the upper and lower side surfaces of the driving motor can also receive air flow flowing from the front to the rear when the vehicle is running. In addition, the rear surface of the driving motor becomes a region that does not directly receive air flow when the vehicle is running.

[0046] On the other hand, when the vehicle is stopped, air circulates in the up-down direction by natural convection. Therefore, the lower surface of the driving motor becomes a surface that can directly receive the air flow generated by natural convection. In addition, the front and rear side surfaces of the driving motor can also receive the air flow generated by natural convection that circulates from the bottom to the top. In addition, the upper surface of the driving motor becomes an area that does not directly receive the air flow generated by natural convection.

[0047] As described above, in any state of the vehicle being driven or being stopped, at least one of the side surfaces in the circumferential direction of the drive motor serves as a surface capable of receiving an air flow.

[0048] However, the drive motor may be configured so that the rotation axis of the drive motor is consistent with the front-rear direction of the vehicle. In this case, air flows along the axial direction of the drive motor, so the upper and lower sides and the left and right sides of the drive motor become areas that can directly receive air flow when the vehicle travels.

[0049] The sound insulation and heat dissipation cover 1 covers the surface of the object 2, for example Figure 1 As shown, when the object 2 is a driving motor, the outer peripheral surface of the driving motor is covered. The sound insulation and heat dissipation cover 1 covers the outer peripheral surface of the object 2 all around, but may also have a partially uncovered portion. In the present embodiment, four sound insulation and heat dissipation covers 1 cover the outer peripheral surface of the object 2. In the present embodiment, four sound insulation and heat dissipation covers 1 cover the upper surface, the lower surface, the front surface, and the rear surface of the object 2. However, the number of the sound insulation and heat dissipation covers 1 may also be one to three, or five or more.

[0050] The sound-insulating heat-dissipating cover 1 includes a sound-absorbing heat sink 3 and a reinforcing member 4. The sound-absorbing heat sink 3 is formed into a planar shape by a first sound-absorbing material having a sound-absorbing property, and covers the surface of the object 2. Therefore, a sound-insulating effect can be obtained by the sound-absorbing heat sink 3. The sound-absorbing heat sink 3 can also be pre-formed into a shape corresponding to the surface shape of the object 2. In addition, the sound-absorbing heat sink 3 can also be formed into a planar shape by a deformable material, and installed on the surface of the object 2 while deforming it. In addition to the sound-absorbing property, the sound-absorbing heat sink 3 also has a heat dissipation property. The sound-absorbing heat sink 3 includes a covering surface 10 covering the surface of the object 2, and a heat dissipation surface 11 on the side opposite to the covering surface 10.

[0051] As the first sound absorbing material constituting the sound absorbing heat sink 3, it is preferably formed of a material with excellent sound absorption performance, such as a foamed resin. As examples of foamed resins, polyurethane foam, acrylic foam, silicone foam, styrene foam, foamed olefin (foamed PP, foamed PE), foamed PVC, foamed EVA, foamed PA, etc. are used. Moreover, the Asker C hardness of the foamed resin of the sound absorbing heat sink 3 is 1 to 60 degrees. In addition, the sound absorbing heat sink 3 can be formed of a non-foamed resin with sound absorption performance, or it can be formed of a metal. As examples of non-foamed resins, polyamide resins, olefin resins, styrene resins, polyurethane resins, silicone resins, acrylic resins, polyvinyl chloride resins, polyethylene resins, polyethylene terephthalate resins, polycarbonate resins, polypropylene resins, ABS resins, EVA resins, carbon fiber plastics (FRP, CFRP), etc. are used. In addition, as examples of metals, iron, aluminum, SUS, copper and alloys thereof are used. However, as a sound absorption performance, a foamed resin with excellent performance is preferred.

[0052] Furthermore, in order to make the sound-absorbing heat sink 3 have heat dissipation performance, the sound-absorbing heat sink 3 can be formed of a foamed resin containing a heat-conductive material. The heat-conductive material can extend from the cover surface 10 of the sound-absorbing heat sink 3 toward the heat dissipation surface 11. For example, in the case where the heat-conductive material is a heat-conductive filler, the heat-conductive filler is arranged from the cover surface 10 of the sound-absorbing heat sink 3 toward the heat dissipation surface 11. Furthermore, the filling amount of the heat-conductive material can also be different depending on the position of the sound-absorbing heat sink 3. For example, since the rear surface of the vehicle is more difficult to be cooled than the front surface of the vehicle, the filling amount of the heat-conductive material on the rear surface of the vehicle can be made larger than that on the front surface of the vehicle. In addition, the filling amount here refers to the filling amount per unit area in the surface direction of the sound-absorbing heat sink 3. In addition, in the case where the heat-conductive material is a metal plate, it is preferably embedded and molded in a manner extending from the cover surface 10 of the sound-absorbing heat sink 3 toward the heat dissipation surface 11.

[0053] The reinforcing member 4 covers the sound absorbing fin 3 from the heat dissipation surface 11 side, and positions the sound absorbing fin 3 relative to the object 2. The reinforcing member 4 is formed separately from the sound absorbing fin 3, and is arranged on the heat dissipation surface 11 side of the sound absorbing fin 3, so that the sound absorbing fin 3 is sandwiched between the reinforcing member 4 and the object 2.

[0054] In addition, as a method of fixing to the object 2, the reinforcing member 4 may be, for example, Figure 1 As shown, the sound absorbing fin 3 is fixed to the object 2 by bolts 5. The sound absorbing fin 3 has a first insertion hole 12 (see FIG. 1 ) through which the bolts 5 are inserted. Figure 3 ), in the reinforcing member 4, a second insertion hole 20 is formed through the reinforcing member 4 for inserting the bolt 5 (refer to Figure 4 However, the method of fixing the reinforcing member 4 and the object 2 is not limited to bolt fastening, and for example, the reinforcing member 4 may be locked to a locking claw provided on the object 2. When the reinforcing member 4 and the object 2 are not fastened by bolts, the first insertion hole 12 and the second insertion hole 20 are omitted.

[0055] The reinforcing member 4 is formed of a material having a greater hardness than the sound absorbing fin 3. In this embodiment, the sound absorbing fin 3 is formed into a planar shape by, for example, a foamed resin. The Asker C hardness of the foamed resin of the reinforcing member 4 is 60 to 99 degrees. In this way, when the sound absorbing fin 3 is formed of a first sound absorbing material that does not have sufficient rigidity, the positioning effect of the sound absorbing fin 3 to the object 2 is low. Even in such a case, the sound absorbing fin 3 can be reliably positioned relative to the object 2 by the reinforcing member 4.

[0056] Furthermore, the reinforcing member 4 is formed of a material having a mass per unit volume (hereinafter referred to as "unit mass") greater than that of the sound absorbing fin 3. As described above, in order for the reinforcing member 4 to perform a reinforcing function, the reinforcing member 4 is formed of a material having a unit mass greater than that of the sound absorbing fin 3.

[0057] The reinforcing member 4 may also be configured to be formed of a second sound-absorbing material having sound-absorbing properties. As the second sound-absorbing material, it may be formed of a material having excellent sound-absorbing properties, such as a foamed resin. However, the foamed resin applied to the reinforcing member 4 is different from the foamed resin applied to the sound-absorbing heat sink 3. For example, as examples of foamed resins applied to the reinforcing member 4, polyurethane foam, acrylic foam, silicone foam, styrene foam, foamed olefin (foamed PP, foamed PE), foamed PVC, foamed EVA, foamed PA, etc. are applied. In addition, even if polyurethane foam is applied to the sound-absorbing heat sink 3 and the reinforcing member 4, the polyurethane foams of the two are of different types. By forming the reinforcing member 4 from the second sound-absorbing material, the sound insulation of the sound insulation heat sink 1 can be improved.

[0058] In addition, the reinforcing member 4 can also be made of a material different from the second sound-absorbing material, such as foamed rubber, non-foamed resin or metal. As examples of foamed rubber, foamed EPDM, foamed CR, foamed NBR / PVC, foamed ACM, etc. are used. In addition, as examples of non-foamed resins, polyamide resins, olefin resins, styrene resins, polyurethane resins, silicone resins, acrylic resins, polyvinyl chloride resins, polyethylene resins, polyethylene terephthalate resins, polycarbonate resins, polypropylene resins, ABS resins, EVA resins, carbon fiber plastics (FRP, CFRP), etc. are used. In addition, as examples of metals, iron, aluminum, SUS, copper and alloys thereof are used. The reinforcing members in these cases are formed of rubber, resin or metal having a higher hardness than the foamed resin. However, from the viewpoint of lightweight, foamed resins are preferred.

[0059] In addition, the reinforcing member 4 is not arranged to cover the entire surface of the sound absorbing fin 3, but is arranged to expose at least a portion of the sound absorbing fin 3. As described above, the sound absorbing fin 3 has heat dissipation performance in addition to sound absorption performance. Therefore, by exposing the sound absorbing fin 3, the heat dissipation performance of the sound absorbing fin 3 can be effectively exerted.

[0060] When the reinforcing member 4 has flexibility to the extent that it can bend and deform, the reinforcing member 4 can be deformed to fit the shape of the outer peripheral surface of the object 2 and attached to the outer peripheral surface of the object 2. In addition, when the reinforcing member 4 is difficult to bend and deform due to its high hardness, it is sufficient to form the reinforcing member 4 in advance into a shape that fits the outer peripheral surface of the object 2. Thus, the reinforcing member 4 can be easily attached to the outer peripheral surface of the object 2.

[0061] 2. Detailed structure of the sound insulation heat dissipation cover 1

[0062] Reference Figures 1 to 8 The detailed structure of the sound insulation and heat dissipation cover 1 is described. Figure 1 As shown in FIG. 1 , the sound insulation and heat dissipation cover 1 is formed into a shape corresponding to the surface shape of the object 2. However, for ease of explanation, Figure 2 to Figure 8 The figure shows a state where the sound insulation and heat dissipation cover 1 is developed in a planar shape, and the following description will be given using this figure.

[0063] like Figure 2 (a) and Figure 2 As shown in (c) in the figure, the sound insulation heat dissipation cover 1 includes a sound absorbing heat sink 3 and a reinforcing member 4. The sound absorbing heat sink 3 and the reinforcing member 4 are described in detail below. The sound absorbing heat sink 3 is composed of only one sheet in this example. In addition, the sound absorbing heat sink 3 can also be composed of a plurality of split bodies formed separately. The sound insulation heat dissipation cover 1 is formed into a substantially rectangular shape when viewed from above. However, the shape of the sound insulation heat dissipation cover 1 is not particularly limited and can be formed into any shape.

[0064] like Figure 3 (a) and Figure 3 As shown in (b) in the figure, the sound absorbing heat sink 3 is not particularly limited, and in this embodiment, it is formed into a substantially rectangular shape when viewed from above. The sound absorbing heat sink 3 is formed in a planar shape as a whole. The sound absorbing heat sink 3 has a pair of first mounting portions 13 formed at positions close to both ends of the object 2 in the axial direction (an example of the first direction) when mounted on the object 2, and a heat dissipation area 14 formed between the pair of first mounting portions 13. At the four corners of the sound absorbing heat sink 3 and at the portion where the pair of first mounting portions 13 are formed, there are formed first insertion holes 12 that penetrate the sound absorbing heat sink 3. As described above, the bolt 5 is inserted into the first insertion hole 12. The covering surface 10 of the sound absorbing heat sink 3 covers a portion of the surface of the object 2 and contacts it.

[0065] A plurality of protrusions 15 are formed protruding outward on the heat dissipation surface 11 of the heat dissipation area 14. The plurality of protrusions 15 are formed in a manner extending in the surface direction of the sound-absorbing heat sink 3. In detail, the plurality of protrusions 15 are formed so as to extend linearly along the circumferential direction of the outer peripheral surface of the object 2 when the sound-absorbing heat sink 3 is mounted on the object 2. The plurality of protrusions 15 are arranged at intervals along the axial direction of the object 2 in the heat dissipation surface 11 of the heat dissipation area 14. In this embodiment, the plurality of protrusions 15 are arranged at equal intervals. However, the shape of the plurality of protrusions 15 may also be wavy when viewed from above. In addition, the plurality of protrusions 15 may be formed to extend in the axial direction of the outer peripheral surface of the object 2, or may be formed to extend in a direction inclined relative to the circumferential direction and the axial direction of the outer peripheral surface of the object 2.

[0066] For example, when the sound absorbing heat sink 3 is formed of a foamed resin containing a heat conductive material, the heat conductive material of the sound absorbing heat sink 3 may extend continuously from the cover surface 10 of the sound absorbing heat sink 3 to the front end of the protrusion 15 along the surface normal direction of the sound absorbing heat sink 3. Thus, by continuously arranging the heat conductive material in the range from the surface of the object 2 to the front end of the protrusion 15, a high heat dissipation performance can be exhibited. In this case, the heat conductive material is preferably a conductive filler.

[0067] For example, in the case of being formed of a foamed resin containing a heat-conductive material, the heat-conductive material of the sound-absorbing heat sink 3 may extend continuously in the extension direction of the protrusion 15 at the front end side of the protrusion 15. Thus, by continuously arranging the heat-conductive material in the range from one end side to the other end side in the extension direction of the protrusion 15, high heat dissipation performance can be exerted also in the surface direction. In this case, the heat-conductive material can be made of metal foil such as copper, stainless steel, steel, aluminum, metal films such as aluminum vapor-deposited films, conductive fillers, thermally conductive resin films, etc. In addition, the metal foil or metal film may be laminated with the resin film. In addition, the heat-conductive material may be provided only in a specific area or a specific protrusion 15 among the plurality of protrusions 15, or may be arranged on the outer surface of the front end side or side surface of the protrusion 15.

[0068] In addition, when the sound-absorbing heat sink 3 is formed of a foamed resin, the following can be done. The heat dissipation surface 11 side of the sound-absorbing heat sink 3 is in a closed-cell state in which the pores of the foamed resin are closed, and the cover surface 10 side is in an open-cell state in which the pores of the foamed resin are opened. By setting the heat dissipation surface 11 side in a closed-cell state, the pressure loss when a fluid such as air flows can be suppressed, thereby improving the heat dissipation performance. On the other hand, by setting the cover surface 10 side in an open-cell state, the sound absorption performance can be improved. That is, through the above structure, the sound absorption performance and the heat dissipation performance can be improved.

[0069] like Figure 4 (a) and Figure 4 As shown in (b) in FIG. 1 , in this embodiment, the reinforcing member 4 is composed of only one member. Alternatively, the reinforcing member 4 may be composed of a plurality of divided bodies.

[0070] The reinforcing member 4 is formed in a substantially rectangular shape in a plan view. The reinforcing member 4 is formed in a substantially same size as the sound absorbing heat sink 3 in a plan view. The reinforcing member 4 includes: a pair of second mounting portions 21 formed at positions close to both ends of the object 2 in the axial direction when mounted on the object 2; and a bridging portion 22 bridging the pair of second mounting portions 21.

[0071] The pair of second mounting portions 21 is configured as a pair of first mounting portions 13 respectively mounted on the sound absorbing heat sink 3. The pair of second mounting portions 21 is opposite to the pair of first mounting portions 13, and has a mounting surface 24 mounted on the pair of first mounting portions 13 by known means such as an adhesive and a double-sided tape 23. In this embodiment, the second mounting portions 21 are mounted on the first mounting portions 13 by the double-sided tape 23. In the axial direction of the object 2, the width dimension of the pair of second mounting portions 21 is smaller than the width dimension of the pair of first mounting portions 13. The pair of second mounting portions 21 is formed with a second insertion hole 20 that passes through the second mounting portions 21. As described above, the bolt 5 is inserted into the second insertion hole 20.

[0072] The bridge portion 22 has a storage recess 25 formed in a concave shape in a direction away from the sound absorbing fin 3 on the surface on the side facing the sound absorbing fin 3. In a state where the second mounting portion 21 of the reinforcing member is mounted on the first mounting portion 13 of the sound absorbing fin 3, the storage recess 25 of the reinforcing member is configured as a heat dissipation area 14 for storing the sound absorbing fin 3. The second mounting portion 21 and the bottom wall 26 of the storage recess 25 are connected by an inclined wall 27 that expands toward the second mounting portion 21. The bottom wall 26 of the storage recess 25 has an inner surface 28 facing the sound absorbing fin 3 and an outer surface 29 on a side opposite to the inner surface 28.

[0073] like Figure 2 As shown in (a) of the figure, in a state where the sound absorbing heat sink 3 is attached to the reinforcement member 4, a vent 30 through which air can flow is formed between the heat dissipation area 14 of the sound absorbing heat sink 3 on both side surfaces of the bridge portion 22 intersecting the circumferential direction of the object 2. As described above, since the air can flow along the circumferential direction of the object 2, the air can flow into the interior of the reinforcement member 4 from the vent 30 and can flow out to the outside. The plurality of protrusions 15 of the sound absorbing heat sink 3 are exposed at the vent 30. Thus, the air that flows into the interior of the reinforcement member 4 from the vent 30 and flows out to the outside can contact the plurality of protrusions 15. As a result, the heat dissipation performance of the sound insulation heat sink 1 is improved. Furthermore, as described above, since the plurality of protrusions 15 are formed to extend in a straight line, the air circulation is not hindered. Thus, the heat dissipation performance of the sound insulation heat sink 1 can be improved. However, as described above, in the case where the air flows along the axial direction of the driving motor, by setting the structure in which the plurality of protrusions 15 extend along the axial direction, the air circulation can be prevented from being hindered.

[0074] like Figure 2 (b) and Figure 4As shown in (b) of the figure, the bridge portion 22 has a plurality of through holes 31 penetrating the bridge portion 22. In this embodiment, the plurality of through holes 31 are formed in the shape of slits extending elongatedly along the arrangement direction of the plurality of protrusions 15 of the sound absorbing heat sink 3. The plurality of through holes 31 are arranged at intervals in the extension direction of the plurality of protrusions 15. In this embodiment, the extension direction of the plurality of through holes 31 is orthogonal to the extension direction of the plurality of protrusions 15. However, it is also possible to configure the extension direction of the plurality of through holes 31 to obliquely intersect the extension direction of the plurality of protrusions 15.

[0075] Furthermore, the shapes of the plurality of through holes 31 will be described in relation to the object 2 . The plurality of through holes 31 are formed in the shape of slits extending elongated in the axial direction of the object 2 and are arranged at intervals in the circumferential direction of the outer surface 29 of the object 2 .

[0076] In this embodiment, the plurality of through holes 31 are of the same shape and size. In addition, the plurality of through holes 31 are arranged at equal intervals. However, the shapes and sizes of the plurality of through holes 31 may be different from each other, and the intervals between the plurality of through holes 31 may be different from each other.

[0077] like Figure 2 (b) and Figure 5 As shown in FIG. 1 , when the sound absorbing heat sink 3 is installed with the reinforcement member 4, at least one protrusion 15 is exposed to the outside from at least one through hole 31. As a result, the heat generated from the object 2 is diffused from the protrusion 15 of the sound absorbing heat sink 3 to the outside through the through hole 31, thereby improving the heat dissipation performance of the sound insulation heat sink 1. Figure 5 , it is described that the bridge portion 22 and the through-hole 31 can be easily distinguished by changing the color tone of the bridge portion 22 .

[0078] like Figure 6 As shown, in this embodiment, in a state before the reinforcement member 4 is attached to the sound absorbing fin 3, the protruding height dimension T1 of the protruding strip 15 protruding from the heat dissipation surface 11 of the sound absorbing fin 3 is set to be larger than the height dimension T2 between the mounting surface 24 of the second mounting portion 21 of the reinforcement member 4 and the inner surface 28 of the bridge portion 22. However, the protruding height dimension T1 of the protruding strip 15 protruding from the heat dissipation surface 11 of the sound absorbing fin 3 may be set to be the same as the height dimension T2 between the mounting surface 24 of the second mounting portion 21 of the reinforcement member 4 and the inner surface 28 of the bridge portion 22.

[0079] In addition, in the present embodiment, the state in which the sound absorbing fin 3 is supported by the reinforcing member 4 from below is described, but the relative positional relationship between the sound absorbing fin 3 and the reinforcing member 4 is not particularly limited.

[0080] like Figure 7As shown in the figure, in the state where the reinforcement member 4 is mounted on the sound absorbing fin 3, the front end portion of the protrusion 15 of the sound absorbing fin 3 abuts against the inner surface 28 of the bridge portion 22 of the reinforcement member 4. Further, as described above, in this embodiment, the protruding height dimension T1 of the protrusion 15 in the state before the reinforcement member 4 is mounted on the sound absorbing fin 3 is set to be larger than the height dimension T2 between the mounting surface 24 of the second mounting portion 21 of the reinforcement member 4 and the inner surface 28 of the bridge portion 22. Therefore, in the state where the reinforcement member 4 is mounted on the sound absorbing fin 3, the protrusion 15 is compressed by the bridge portion 22 of the reinforcement member in the protruding direction of the protrusion 15.

[0081] The plurality of protrusions 15 of the sound absorbing fin 3 abut against the bridge portion 22 of the reinforcing member 4, so that the plurality of protrusions 15 of the sound absorbing fin 3 are supported by the bridge portion 22 of the reinforcing member 4. Thus, the sound absorbing fin 3 can be prevented from deforming into a convex shape in the direction from the cover surface 10 toward the heat dissipation surface 11. As a result, the cover surface 10 of the sound absorbing fin 3 can be prevented from being flexed and deformed so as to be separated from the object 2, and thus the formation of a gap between the object 2 and the cover surface 10 of the sound absorbing fin 3 can be prevented. Thus, the heat generated from the object 2 is quickly conducted to the sound absorbing fin 3, so that the heat dissipation performance of the sound insulation heat dissipation cover 1 is improved.

[0082] Furthermore, the plurality of protrusions 15 are compressed by the pressure from the reinforcing member 4, whereby the sound absorbing fin 3 is pressed against the object 2. This improves the close contact between the sound absorbing fin 3 and the object 2. As a result, the heat dissipation performance of the sound insulation heat dissipation cover 1 is further improved.

[0083] like Figure 7 As shown in the figure, the ridges 15 are compressed by the bridge portions 22 of the reinforcing member 4, so that at least a portion of the cover surface 10 of the sound absorbing heat sink 3 has a bulging portion 16 bulging toward the side opposite to the reinforcing member 4. In this embodiment, the entire cover surface 10 of the heat dissipation region 14 of the sound absorbing heat sink 3 is the bulging portion 16. In this embodiment, the bulging portion 16 contains the above-mentioned heat conductive material. However, a structure in which a portion of the cover surface 10 of the sound absorbing heat sink 3 is bulged may also be adopted, and a structure in which the cover surface 10 of the sound absorbing heat sink 3 does not have the bulging portion 16 may also be adopted.

[0084] like Figure 8As shown, in a state where the sound insulation heat dissipation cover 1 is attached to the object 2, the cover surface 10 of the sound absorbing heat dissipation sheet 3 covers the surface of the object. Therefore, the bulging portion 16 bulging in the cover surface 10 of the sound absorbing heat dissipation sheet 3 reliably contacts the object 2 and is compressed by the object 2. As a result, the closeness between the sound absorbing heat dissipation sheet 3 and the object 2 is improved, so the heat dissipation performance of the sound insulation heat dissipation cover 1 is improved. In addition, in this embodiment, the state where the sound insulation heat dissipation cover 1 is attached to the lower surface of the object 2 is described as an example, but there is no limitation on which part of the object 2 the sound insulation heat dissipation cover 1 is attached to.

[0085] Furthermore, by forming the bulging portion 16 over the entire cover surface 10 of the heat dissipation region 14 , the adhesion between the sound absorbing heat sink 3 and the object 2 is improved over the entire cover surface 10 of the heat dissipation region 14 , thereby improving the heat dissipation performance of the sound insulation heat dissipation cover 1 .

[0086] Furthermore, since the heat conductive material is included in the bulged portion 16 , the heat generated by the object 2 can be quickly transferred to the sound absorbing heat sink 3 , and thus the heat dissipation performance of the sound insulating heat sink 1 is improved.

[0087] (Second Embodiment)

[0088] Next, refer to Figure 9-10 The sound insulation and heat dissipation cover 41 of the second embodiment will be described. Fig. 9 As shown, the reinforcement member 42 of the sound insulation heat dissipation cover 41 of this embodiment has an insertion recess 43 on the inner surface 28 of the bridge portion 22. The insertion recess 43 is formed in a recessed manner at a position opposite to the front end portions of the plurality of protrusions 15 of the sound absorbing heat dissipation sheet 3 in a state where the reinforcement member 42 is attached to the sound absorbing heat dissipation sheet 3. The insertion recess 43 is formed to extend along the circumferential direction of the object 2 in the same manner as the plurality of protrusions 15. The opening of the insertion recess 43 is formed to be sized so that the front end portions of the protrusions 15 can be inserted.

[0089] like Fig.10 As shown in the figure, in the state where the sound absorbing heat sink 3 is attached with the reinforcement member 42, the front end of the protrusion 15 is embedded in the embedding recess 43. Thus, the protrusion 15 is prevented from being bent and deformed due to gravity or heat from the object 2. As a result, it is possible to prevent a gap from being formed between the protrusion 15 of the sound absorbing heat sink 3 and the bridge portion 22 of the reinforcement member 42, thereby improving the heat dissipation performance of the sound insulation heat sink 41.

[0090] In addition, among the reference numerals used in the second embodiment and thereafter, unless otherwise indicated, the same reference numerals as those used in the already described embodiments represent the same components as those in the already described embodiments.

[0091] (Third Embodiment)

[0092] Next, refer to Figure 11-12 The sound insulation and heat dissipation cover 51 of the third embodiment will be described. Fig.11 As shown, the first mounting portion 53 provided in the sound absorbing heat sink 52 of this embodiment is formed to protrude in the protruding direction of the protrusion 15. The protruding height dimension T3 of the first mounting portion 53 is set to be larger than the protruding height dimension T1 of the protrusion 15. Thus, a step is formed between the first mounting portion 53 and the heat dissipation area 14 in the protruding direction of the protrusion 15.

[0093] The reinforcing member 54 of this embodiment is formed in a flat plate shape. No step is formed between the pair of second mounting portions 55 and a portion different from the pair of second mounting portions 55 in the inner surface 28 of the reinforcing member 54 .

[0094] like Fig.12 As shown in the figure, in a state where the second mounting portion 55 of the reinforcing member 54 is mounted on the first mounting portion 53 of the sound absorbing fin 52, a space is formed between the heat dissipation region 14 of the sound absorbing fin 52 and the bridge portion 56 of the reinforcing member 54 by the protruding height dimension T3 of the first mounting portion 53. The heat dissipation region 14 of the sound absorbing fin 52 and the plurality of protrusions 15 are accommodated in the space. In addition, the protruding height dimension T3 of the first mounting portion 53 can also be set to be smaller than the protruding height dimension T1 of the protrusion 15. In this case, the plurality of protrusions 15 are accommodated in the space in a compressed state.

[0095] (Fourth Embodiment)

[0096] Next, refer to Fig.13 A fourth embodiment of the sound insulation heat dissipation cover 61 is described. A compression protrusion 63 is formed on the inner surface 28 of the bridge portion 22 of the reinforcement member 62 of the sound insulation heat dissipation cover 61 of this embodiment, and the compression protrusion 63 protrudes toward the sound absorbing heat dissipation fin 3 when the second mounting portion 21 of the reinforcement member 62 is mounted on the first mounting portion 13 of the sound absorbing heat dissipation fin 3.

[0097] The compression protrusion 63 only needs to be formed on at least a portion of the inner surface 28 of the bridge portion 22. However, the entire inner surface 28 of the bridge portion 22 may protrude toward the sound absorbing heat sink 3, so that the entire inner surface 28 of the bridge portion 22 becomes the compression protrusion 63. Since the plurality of protrusions 15 of the sound absorbing heat sink 3 are compressed by the compression protrusion 63, the heat dissipation of the sound insulation heat sink 61 is further improved.

[0098] As described above, the plurality of protrusions 15 are compressed by the bridge portion 22, thereby forming the bulging portion 16 on the cover surface 10 of the sound absorbing fin 3. Furthermore, the protrusions 15 are compressed by the compression protrusions 63, thereby forming an additional bulging portion 64 that further bulges from the bulging portion 16 on the cover surface 10 of the sound absorbing fin 3. The additional bulging portion 64 is formed at a position overlapping with the compression protrusion 63 of the bridge portion 22 in the protruding direction of the protrusion 15.

[0099] When the sound insulation heat dissipation cover 61 is attached to the object 2, the portion where the additional bulge 64 is formed is strongly compressed by the object 2. This can suppress the formation of a gap between the sound absorbing heat dissipation sheet 3 and the object, so that the heat dissipation performance of the sound insulation heat dissipation cover 61 is further improved. This is particularly effective when the object 2 has a portion where the temperature is locally high.

[0100] (Fifth Embodiment)

[0101] Next, refer to Fig.14 The sound insulation and heat dissipation cover 71 of the fifth embodiment will be described. Fig.14 As shown, in the bridge portion 22 of the present embodiment, a plurality of through holes 72 having a circular internal shape are arranged at intervals along the extension direction of the plurality of protrusions 15, and are arranged at intervals along the arrangement direction of the plurality of protrusions 15. A portion of the protrusion 15 is exposed from each through hole 72. Thus, the heat generated in the object 2 is transferred to the sound absorbing heat sink 3, and then heat is conducted to the protrusion 15, and diffused from the protrusion 15 to the outside through the through hole 72. Thus, the heat dissipation of the sound insulation heat sink 71 can be improved.

[0102] In addition, the portion of the bridge portion 22 where the through hole 72 is not formed abuts against the front ends of the plurality of protrusions 15. This can prevent the sound absorbing fin 3 from deforming so as to be separated from the surface of the object 2. As a result, it is possible to prevent a gap from being formed between the sound absorbing fin 3 and the object 2, thereby improving the heat dissipation performance of the sound insulation heat dissipation cover 71.

[0103] However, the plurality of through holes 72 may be arranged along only one of the extension direction of the protrusion 15 and the arrangement direction of the protrusion 15 but not along the other direction, or may be randomly arranged along neither the extension direction of the protrusion 15 nor the arrangement direction of the protrusion 15 .

[0104] (Sixth Embodiment)

[0105] Next, refer to Fig.15 A sound insulation and heat dissipation cover 81 according to the sixth embodiment will be described. In the bridge portion 22 of this embodiment, a plurality of through holes 72 having a circular inner shape are arranged in a staggered pattern.

[0106] The portion of the bridge portion 22 where the plurality of through holes 72 arranged in a staggered manner are not formed is formed into a shape in which the elongated strip-shaped portion obliquely crosses both the extending direction of the plurality of protrusions 15 and the arrangement direction of the plurality of protrusions 15. Thus, the plurality of protrusions 15 can be held evenly without being biased, and thus the sound absorbing heat sink 3 can be further suppressed from deforming in the direction away from the object 2. As a result, the heat dissipation performance of the sound insulation heat sink 81 can be improved.

[0107] (Variation of Sixth Embodiment)

[0108] exist Fig.16 , a modification of the sixth embodiment is described. The internal shape of the plurality of through holes 82a in this embodiment is formed into a hexagon. The internal shape of the plurality of through holes 82a is not limited to a circle or a hexagon, but may be a polygon such as a triangle, a quadrilateral, a pentagon, or an ellipse, and any shape may be appropriately selected.

[0109] Furthermore, the sizes of the plurality of through holes 82a may also be different from each other. For example, when there is a portion of the object 2 that is prone to high temperature, the heat dissipation of the sound insulation heat dissipation cover 81 can be improved by making the size of the through hole 82a corresponding to the portion that is prone to high temperature larger than that of other portions.

[0110] The present disclosure is not limited to the above-described embodiments, and can be applied to various embodiments within the scope not departing from the gist of the present disclosure.

Claims

1. A sound-insulating heat-dissipating cover (1, 41, 61, 71, 81), which covers an object (2), wherein: The sound insulation and heat dissipation cover has: A sound absorbing heat sink (3) formed into a planar shape by a first sound absorbing material and having a covering surface (10) covering the surface of the object and a heat dissipation surface (11) on a side opposite to the covering surface; and a reinforcing member (4, 42, 62) formed of a material having a greater hardness than the first sound absorbing material, and covering the sound absorbing fin from the heat dissipation surface side of the sound absorbing fin, The sound absorbing heat sink also has: a pair of first mounting portions (13, 53) formed at positions along the cover surface close to both ends in the first direction; and a heat dissipation region formed between the pair of first mounting portions, A plurality of protrusions (15) arranged at intervals are formed on the heat dissipation surface of the heat dissipation area of ​​the sound-absorbing heat sink. The reinforcing member comprises: a pair of second mounting portions (21, 55) formed at positions close to both ends in the first direction and respectively mounted on the pair of first mounting portions; and a bridging portion (22, 56) which bridges the pair of second mounting portions and has a plurality of through holes (31, 72, 82a), In a state where the pair of second mounting portions of the reinforcing member are mounted to the pair of first mounting portions of the sound absorbing fin, the plurality of protrusions of the sound absorbing fin abut against the bridge portion of the reinforcing member.

2. The sound insulation and heat dissipation cover according to claim 1, wherein: The reinforcing member is formed of a second sound absorbing material having sound absorbing properties.

3. The sound insulation and heat dissipation cover according to claim 1, wherein: The bridge portion includes a housing recess (25) formed on a surface on a side facing the sound absorbing fin, formed in a concave shape in a direction away from the sound absorbing fin, and housing the heat dissipation area of ​​the sound absorbing fin.

4. The sound insulation and heat dissipation cover according to claim 1, wherein: In a state where the second mounting portion of the reinforcing member is mounted on the first mounting portion of the sound absorbing fin, the plurality of protrusions are compressed by the bridging portion of the reinforcing member in the direction in which the plurality of protrusions protrude.

5. The sound insulation and heat dissipation cover according to claim 4, wherein: When the second mounting portion of the reinforcing member is mounted on the first mounting portion of the sound absorbing fin, at least a portion of the cover surface of the heat dissipation region includes a bulging portion (16) bulging toward a side opposite to the reinforcing member.

6. The sound insulation and heat dissipation cover according to claim 5, wherein: The entire covering surface of the heat dissipation region is the bulging portion.

7. The sound insulation and heat dissipation cover according to claim 1, wherein: The bridge portion includes a receiving recessed portion, which is formed on a surface on a side opposite to the sound absorbing fin, is formed in a concave shape in a direction away from the sound absorbing fin, and receives the heat dissipation area of ​​the sound absorbing fin. In a state before the second mounting portion of the reinforcing member is mounted on the first mounting portion of the sound absorbing fin, a protruding height dimension of at least a portion of the plurality of protrusions protruding from the heat dissipation surface of the sound absorbing fin is formed to be larger than a depth dimension of the housing recessed portion from the second mounting portion. When the second mounting portion of the reinforcing member is mounted on the first mounting portion of the sound absorbing fin, at least a portion of the plurality of protrusions is compressed by the bridging portion of the reinforcing member in a height direction in which the plurality of protrusions protrude.

8. The sound insulation and heat dissipation cover according to claim 1, wherein: When the second mounting portion of the reinforcing member is mounted on the first mounting portion of the sound absorbing fin, an embedding recess (43) is provided on the bridging portion of the reinforcing member for embedding the front end portions of at least a portion of the plurality of protrusions of the sound absorbing fin.

9. The sound insulation and heat dissipation cover according to claim 1, wherein: When the second mounting portion of the reinforcing member is mounted on the first mounting portion of the sound absorbing fin, a compression protrusion (63) protruding toward the sound absorbing fin is formed on at least a portion of the bridging portion of the reinforcing member.

10. The sound insulation and heat dissipation cover according to claim 1, wherein: When the second mounting portion of the reinforcing member is mounted on the first mounting portion of the sound absorbing fin, at least two of the plurality of through holes are arranged at intervals along the extending direction of the plurality of protrusions.

11. The sound insulation and heat dissipation cover according to claim 10, wherein: At least two of the plurality of through holes are formed in a slit shape that is elongated in the arrangement direction of the plurality of protrusions, and are arranged at intervals in the extending direction of the plurality of protrusions.

12. The sound insulation and heat dissipation cover according to claim 11, wherein: The plurality of protrusions are formed to extend in a straight line. At least two of the plurality of through holes are formed in a slit shape that is elongated in a direction orthogonal to an extending direction of the plurality of protrusions.

13. The sound insulation and heat dissipation cover according to claim 10, wherein: In the bridge portion of the reinforcing member, at least two of the plurality of through holes are arranged at intervals along an arrangement direction of the plurality of protrusions.

14. The sound insulation and heat dissipation cover according to claim 10, wherein: The plurality of through holes are arranged in a staggered manner.

15. The sound insulation and heat dissipation cover according to claim 1, wherein: The plurality of through holes have through holes of different sizes.

16. The sound insulation and heat dissipation cover according to claim 1, wherein: At least a portion of the heat dissipation region comprises a heat conductive material, The heat conductive material extends along a surface normal direction of the sound absorbing heat sink.

17. The sound insulation and heat dissipation cover according to claim 16, wherein: The heat conductive material extends on the front end side of the plurality of protrusions of the sound absorbing heat sink along the extending direction of the plurality of protrusions.

18. The sound insulation and heat dissipation cover according to claim 16 or 17, wherein: In a state where the second mounting portion of the reinforcing member is mounted on the first mounting portion of the sound absorbing fin, at least a portion of the cover surface of the heat dissipation region includes a bulging portion bulging toward a side opposite to the reinforcing member. The heat conductive material is included in the bulging portion.

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