Sound-absorbing cotton fixing structure and vehicle

Abstract

The utility model belongs to the technical field of vehicles, and particularly relates to a sound-absorbing cotton fixing structure and a vehicle. The sound-absorbing cotton fixing structure is used for fixing sound-absorbing cotton, the sound-absorbing cotton fixing structure comprises a base body and a body, the body is arranged on the base body and comprises a fixing part, and the fixing part and the base body are arranged at an interval; a hole is formed in the base body, and the projection of the fixing part on the base body is located in the hole in the thickness direction of the base body. According to the sound-absorbing cotton fixing structure, the holes are formed in the base body, when the sound-absorbing cotton fixing structure is formed, only the upper mold and the lower mold are needed, the upper mold is used for forming the upper surface of the base body and the upper surface of the fixing part, the lower mold is used for forming the lower surface of the base body and the lower surface of the fixing part, and after forming is completed, the upper mold can be demolded upwards; the lower mold can be demolded downwards and cannot be blocked due to the existence of the holes, so that the structure of the mold of the sound-absorbing cotton fixing structure is simplified, the development cost of the mold is reduced, the sound-absorbing cotton fixing structure is simple to form, and the forming process is easy to control.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially, relates to a kind of sound-absorbing cotton fixing structure and vehicle. BACKGROUND

[0002] In the whole vehicle design process, acoustic package materials such as sound-absorbing and sound-insulating are often used to reduce interior noise and improve NVH performance. Sound-absorbing cotton plays an irreplaceable role in sound absorption and noise reduction of the whole vehicle. The fixing of sound-absorbing cotton is generally achieved by adhesion, welding and clamping. Specifically, adhesion is used, and the adhesion material will lose its adhesion after long-term use, causing the sound-absorbing cotton to fall off. In high-temperature environments, it is also easy to emit irritating odors. Welding is used, which has problems such as insufficient welding strength, falling off, and welding through and burning the sound-absorbing cotton, causing the sound-absorbing cotton to lose its sound absorption and noise reduction effect. Clamping is used, which requires pre-drilling holes in the sound-absorbing cotton. The holes and gaps will affect the acoustic effect, and the product surface needs to be designed with a clamping structure, greatly increasing the cost of product development.

[0003] Therefore, a sound-absorbing cotton fixing structure has appeared in the prior art, which includes a positioning part arranged on a base and a fixing part arranged on the positioning part. The sound-absorbing cotton surrounds the positioning part and is clamped between the fixing part and the base. However, the forming mold of the existing sound-absorbing cotton fixing structure includes an upper mold, a lower mold and a slider. During injection molding, if the slider is not set, the upper mold will not be able to be demolded due to the obstruction of the fixing part. Therefore, it can be seen that the forming mold structure of the sound-absorbing cotton fixing structure in the prior art is complex, the forming steps are many, and the process is not easy to control. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a sound-absorbing cotton fixing structure and vehicle, which is not easy to fall off and simplifies the mold structure, making the forming process simple and easy to control.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The sound-absorbing cotton fixing structure is used to fix sound-absorbing cotton, and includes:

[0007] a base;

[0008] a body arranged on the base, the body including a fixing part, the fixing part being arranged apart from the base along the thickness direction of the base;

[0009] The sound-absorbing cotton fixing structure is integrally formed, and the base is provided with a hole. Along the thickness direction of the base, the projection of the fixing part on the base is located in the hole.

[0010] As an optional technical solution of the sound-absorbing cotton fixing structure, the sound-absorbing cotton fixing structure further includes an anti-falling part arranged on the side of the fixing part facing the base to prevent the sound-absorbing cotton from falling off.

[0011] As an optional technical scheme of the sound-absorbing cotton fixing structure, the anti-dropping part comprises one or more barbs.

[0012] As an optional technical scheme of the sound-absorbing cotton fixing structure, the sound-absorbing cotton fixing structure comprises a plurality of the anti-dropping parts, a plurality of the fixing parts are arranged on the body in a circumferential direction of the body, and the plurality of the anti-dropping parts are arranged on the plurality of the fixing parts one by one; a plurality of the holes are arranged on the base body, the plurality of the holes correspond to the plurality of the anti-dropping parts one by one, and the projection of each of the anti-dropping parts and the corresponding fixing part on the base body is located in the corresponding hole in the thickness direction of the base body.

[0013] As an optional technical scheme of the sound-absorbing cotton fixing structure, the hole is provided with a reinforcing structure on the circumferential side.

[0014] As an optional technical scheme of the sound-absorbing cotton fixing structure, the reinforcing structure is a convex rib.

[0015] As an optional technical scheme of the sound-absorbing cotton fixing structure, the body further comprises a positioning part, the positioning part is arranged on the base body, the fixing part is arranged on the positioning part, the sound-absorbing cotton sleeve is arranged on the positioning part and is clamped between the fixing part and the base body.

[0016] As an optional technical scheme of the sound-absorbing cotton fixing structure, the end face of the fixing part facing the base body is parallel to the end face of the base body facing the fixing part.

[0017] As an optional technical scheme of the sound-absorbing cotton fixing structure, the body is formed with a hollow cavity.

[0018] As an optional technical scheme of the sound-absorbing cotton fixing structure, one end of the hollow cavity away from the base body has an opening, and the width of the hollow cavity gradually increases from the closed end to the opening end.

[0019] A vehicle, characterized in comprising a vehicle body, sound-absorbing cotton and the sound-absorbing cotton fixing structure according to any one of the preceding schemes, and the sound-absorbing cotton fixing structure is used for fixing the sound-absorbing cotton on the vehicle body.

[0020] The beneficial effects of the utility model are as follows:

[0021] The utility model provides a sound absorbing cotton fixing structure for fixing sound absorbing cotton, and the sound absorbing cotton fixing structure comprises a base body and a main body, the main body is arranged on the base body, and the main body comprises a fixing part, and the fixing part is arranged at intervals from the base body; a hole is arranged on the base body, along the thickness direction of the base body, and the projection of the fixing part on the base body is located in the hole. When the sound absorbing cotton fixing structure is formed, only an upper die and a lower die are needed, the upper surface of the base body and the upper surface of the fixing part are formed by using the upper die, the lower surface of the base body and the lower surface of the fixing part are formed by using the lower die, the upper die can be demoulded upwards after forming, the lower die can be demoulded downwards, the lower die is not blocked due to the existence of the hole, therefore, the structure of the die of the sound absorbing cotton fixing structure is simplified, the development cost of the die is reduced, the sound absorbing cotton fixing structure is simple to form, and the forming process is easy to control. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structure schematic view of the sound absorbing cotton fixing structure provided by the utility model embodiment;

[0023] Figure 2 is a structure schematic view of the sound absorbing cotton fixing structure fixing sound absorbing cotton provided by the utility model embodiment;

[0024] Figure 3 is a principle schematic view of the sound absorbing cotton fixing structure fixing sound absorbing cotton provided by the utility model embodiment Figure 1 ;

[0025] Figure 4 is a principle schematic view of the sound absorbing cotton fixing structure fixing sound absorbing cotton provided by the utility model embodiment Figure 2 ;

[0026] Figure 5 is a demoulding direction schematic view of the die of the sound absorbing cotton fixing structure provided by the utility model embodiment.

[0027] In the drawings:

[0028] 10, base body; 101, hole; 20, main body; 201, hollow cavity; 21, positioning part; 22, fixing part; 30, barb; 40, reinforcing structure;

[0029] 100, sound absorbing cotton. DETAILED DESCRIPTION

[0030] The utility model will be further explained in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings, not all structures.

[0031] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two element's mutual action relation.For the ordinary skill in the art, the above-mentioned term can be understood in the utility model according to the specific meaning of the specific situation.

[0032] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional feature between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0033] In the description of the embodiment, the terms "on", "under", "right", etc.Orientation or positional relationship based on the orientation or positional relationship shown in the drawing, just for the convenience of description and simplification operation, and not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are just used to distinguish in the description, and have no special meaning.

[0034] As Figures 1 to 5 As shown in the utility model provides a kind of sound-absorbing cotton fixing structure, for fixing sound-absorbing cotton 100, the sound-absorbing cotton fixing structure includes base body 10, body 20 and anti-drop part, body 20 is set on base body 10, body 20 includes fixed part 22, fixed part 22 is spaced apart from base body 10, anti-drop part is set on the side of fixed part 22 towards base body 10, and anti-drop part is used to prevent sound-absorbing cotton 100 from loosening.

[0035] Specifically, anti-drop part 30 includes one or more barbs 30, and the barb 30 can be pierced into the sound-absorbing cotton 100 to prevent the sound-absorbing cotton 100 from loosening.Alternatively, the barb 30 and the fixed part 22 are arranged at an obtuse angle, i.e., the free end of the barb 30 is inclined away from the body 20, so that the barb 30 can be easily pierced into the sound-absorbing cotton 100.

[0036] Specifically, the body 20 comprises a positioning part 21 and a fixing part 22, the positioning part 21 is arranged on the base body 10, the fixing part 22 is arranged on the positioning part 21, and the anti-disengagement part is arranged on the side of the fixing part 22 facing the base body 10. The sound-absorbing cotton 100 has a positioning hole, and when assembled, the sound-absorbing cotton 100 is sleeved on the positioning part 21 through the positioning hole and clamped between the fixing part 22 and the base body 10. Optionally, the lower end surface of the fixing part 22 is parallel to the upper end surface of the base body 10, so as to increase the contact area with the sound-absorbing cotton 100 when the sound-absorbing cotton 100 is clamped, and make the assembly of the sound-absorbing cotton 100 more stable. After the sound-absorbing cotton 100 is assembled in place, the barb 30 penetrates into the sound-absorbing cotton 100 to prevent the sound-absorbing cotton 100 from disengaging. Optionally, a recess part surrounding the positioning hole is formed on the sound-absorbing cotton 100, and when assembled, the recess part is clamped between the fixing part 22 and the base body 10, and the barb 30 penetrates into the recess part. By arranging the recess part, the sound-absorbing cotton fixing structure is more convenient and labor-saving when fixing the sound-absorbing cotton 100, and does not affect the thickness of the sound-absorbing cotton 100 in other places, ensuring the sound-absorbing effect of the sound-absorbing cotton 100.

[0037] In the embodiment, the sound-absorbing cotton fixing structure is integrally injection molded, that is, a mold is used to integrally injection mold the sound-absorbing cotton fixing structure.

[0038] In the embodiment, the base body 10 is provided with a hole 101, and the projections of the fixing part 22 and the anti-disengagement part on the base body 10 are located in the hole 101 along the thickness direction of the base body 10. By arranging the hole 101 on the base body 10, the structure of the mold of the sound-absorbing cotton fixing structure can be simplified, and the development cost of the mold can be reduced. Specifically, referring to Figure 5 , the mold only needs an upper mold and a lower mold, the upper mold is used to form the faces A1-A6, the lower mold is used to form the faces B1-B4, the barb 30 and the hole 101, that is, the lower mold can cooperate with the upper mold to form the sound-absorbing cotton fixing structure; and after the forming is completed, the upper mold can be demolded upward according to the upward arrow, and the lower mold can be demolded downward through the hole 101 according to the downward arrow. Due to the existence of the hole 101, the lower mold will not be blocked by the barb 30, the forming is simple, and the process is easy to control.

[0039] Further, the sound-absorbing cotton fixing structure comprises a plurality of anti-disengagement parts, the body 20 is provided with a plurality of fixing parts 22 distributed at intervals along the circumference of the body 20, and a plurality of anti-disengagement parts are arranged one by one on the plurality of fixing parts 22; the base body 10 is provided with a plurality of holes 101, and the plurality of holes 101 correspond to the plurality of anti-disengagement parts one by one, and along the thickness direction of the base body 10, the projections of each anti-disengagement part and the corresponding fixing part 22 on the base body 10 are respectively located in the corresponding hole 101. By arranging a plurality of anti-disengagement parts, the sound-absorbing cotton 100 can be fixed and prevented from disengaging in each direction, further strengthening the fixation of the sound-absorbing cotton 100.

[0040] In the embodiment, two anti-disengagement portions are arranged, and two holes 101 are arranged correspondingly, but the number of the anti-disengagement portions is not limited to this, and the number of the anti-disengagement portions is determined according to the size of the fixing portion 22, because the size of the fixing portion 22 determines the size of the hole 101, and the size of the hole 101 determines the interval between the adjacent holes 101, and the setting principle of the specific number of the anti-disengagement portions is to ensure that the interval between the adjacent holes 101 cannot be too small (that is, cannot be less than a set threshold value), so as to ensure the strength of the base body 10 at the support sound-absorbing cotton fixing structure.

[0041] In the embodiment, the cross section of the positioning portion 21 is quadrangular, and two anti-disengagement portions are arranged on the opposite sides of the positioning portion 21 respectively, and optionally, the opposite sides of the positioning portion 21 are both provided with the fixing portion 22, and the two anti-disengagement portions are arranged on the two fixing portions 22 one by one.

[0042] Optionally, the hole 101 is provided with a reinforcing structure 40 on the periphery, which is used for reinforcing the strength of the base body 10 on the periphery of the hole 101. It can be understood that the arrangement of the hole 101 on the base body 10 will weaken the strength of the base body 10 on the periphery of the hole 101 to some extent, and the arrangement of the reinforcing structure 40 on the periphery of the hole 101 can compensate for the weakening of the strength of the base body 10 caused by the hole 101. Optionally, the reinforcing structure 40 is a convex rib continuously distributed along the periphery of the hole 101. Optionally, the reinforcing structure 40 can also be a convex point distributed at intervals along the periphery of the hole 101. Specifically, the reinforcing structure 40 is formed when the base body 10 and the sound-absorbing cotton fixing structure are injection molded.

[0043] Further, the sound-absorbing cotton fixing structure needs to be cooled after injection molding, and if the body 20 is a solid structure, the inside of the body 20 can not be cooled completely, and therefore the hollow cavity 201 is formed on the body 20, which is helpful for the cooling of the sound-absorbing cotton fixing structure after injection molding, and can also reduce the weight of the sound-absorbing cotton fixing structure and save materials. Specifically, the hollow cavity 201 is formed when the base body 10 and the sound-absorbing cotton fixing structure are injection molded. Optionally, the end of the hollow cavity 201 away from the base body 10 has an opening, and the cross-sectional area of the hollow cavity 201 gradually increases from the closed end to the opening end, so as to facilitate the demolding of the mold after the base body 10 and the sound-absorbing cotton fixing structure are molded.

[0044] The utility model also provides a kind of vehicle, including vehicle body, sound-absorbing cotton 100 and the sound-absorbing cotton fixing structure as described above, and the sound-absorbing cotton fixing structure is used to fix sound-absorbing cotton 100 on vehicle body. By using the above sound-absorbing cotton fixing structure, it can prevent sound-absorbing cotton 100 from loosening, and can simplify mold and molding process.

[0045] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A sound absorbing cotton fixing structure for fixing a sound absorbing cotton (100), characterized in that, The sound-absorbing cotton fixing structure comprises: a base body (10); a body (20) arranged on the base body (10), wherein the body (20) comprises a fixing part (22) arranged along a thickness direction of the base body (10); a hole (101) is arranged on the base body (10), and a projection of the fixing part (22) on the base body (10) is located in the hole (101) along the thickness direction of the base body (10).

2. The sound absorbing cotton fixing structure according to claim 1, characterized by, The sound-absorbing cotton fixing structure further comprises an anti-loosening part arranged on the fixing part (22), wherein the anti-loosening part extends towards the base body (10) to prevent the sound-absorbing cotton (100) from loosening, and a projection of the anti-loosening part on the base body (10) is located in the hole (101).

3. The sound absorbing cotton fixing structure according to claim 2, characterized by The anti-loosening part comprises at least one barb (30).

4. The sound absorbing cotton fixing structure according to claim 2, characterized by The sound-absorbing cotton fixing structure comprises a plurality of anti-loosening parts, a plurality of fixing parts (22) are arranged on the body (20) and spaced along a circumferential direction of the body (20), and a plurality of anti-loosening parts are arranged one-to-one on the plurality of fixing parts (22); a plurality of holes (101) are arranged on the base body (10), the plurality of holes (101) correspond one-to-one to the plurality of anti-loosening parts, and projections of each anti-loosening part and the corresponding fixing part (22) on the base body (10) are located in the corresponding hole (101) along the thickness direction of the base body (10).

5. The sound absorbing cotton fixing structure according to claim 1, wherein A reinforcing structure (40) is arranged on a circumferential side of the hole (101).

6. The sound absorbing cotton fixing structure according to claim 5, wherein The reinforcing structure (40) is a convex rib.

7. The sound absorbing cotton fixing structure according to claim 1, wherein The body (20) further comprises a positioning part (21) arranged on the base body (10), and the fixing part (22) is arranged on the positioning part (21); the sound-absorbing cotton (100) is sleeved on the positioning part (21) and clamped between the fixing part (22) and the base body (10).

8. The sound absorbing cotton fixing structure according to claim 1, wherein An end surface of the fixing part (22) facing the base body (10) is parallel to an end surface of the base body (10) facing the fixing part (22).

9. The sound absorbing cotton fixing structure according to any one of claims 1-8, characterized in that, The body (20) is formed with a hollow cavity (201).

10. The sound absorbing cotton fixing structure according to claim 9, wherein An end of the hollow cavity (201) away from the base body (10) has an opening, and a cross-sectional area of the hollow cavity (201) gradually increases from a closed end to the opening end.

11. Vehicle, characterized in that A vehicle body, sound-absorbing cotton (100), and the sound-absorbing cotton fixing structure according to any one of claims 1-10 are provided, and the sound-absorbing cotton fixing structure is used to fix the sound-absorbing cotton (100) on the vehicle body.

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