Connecting device of double-layer polyurethane sound insulation part

Abstract

The utility model discloses a connecting device of a double-layer polyurethane sound insulation piece, the double-layer polyurethane sound insulation piece comprises an upper cover, a lower cover and a blind rivet, the upper cover is provided with an upper clamping block, the lower cover is provided with a lower clamping block, and the blind rivet is fixedly connected with the upper clamping block and the lower clamping block. The upper cover and the lower cover of the double-layer polyurethane sound insulation piece are fixedly installed through the blind rivets, operation is easy and convenient, the installation efficiency of the upper cover and the lower cover is effectively improved, the upper clamping block and the upper cover are integrally formed, the lower clamping block and the lower cover are integrally formed, and the installation efficiency of the upper cover and the lower cover is improved. The upper clamping block and the lower clamping block are one part of the double-layer polyurethane sound insulation part, the PU foam is synchronously formed when being formed into a product, operation is easy, and the service life of the double-layer polyurethane sound insulation part is effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of automobile accessories and relates to a connecting device for a double-layer polyurethane sound insulation piece. Background Art

[0002] As the popularity of new energy vehicles becomes more and more widespread, the requirements for lightweight soundproof covers are relatively high. The lightweight soundproof covers on the market currently include double-layer polyurethane soundproof covers, but there is a problem that needs to be solved urgently. How to efficiently and reliably install the double-layer polyurethane soundproof cover on the car? The traditional connection structure is no longer applicable. The traditional connection structure includes industrial staples or parent-child buckles or Velcro. The problem with industrial staples is that industrial staples are destructive connections. Industrial staples need to be nailed into the polyurethane material, and the internal material of the polyurethane material is loose, which can easily cause the material to tear and the fixation is not firm. If Velcro is used, the polyurethane surface needs to be specially treated before the Velcro can be attached to its surface, which will reduce the installation efficiency and the cost is high. Summary of the invention

[0003] In order to overcome at least one deficiency of the prior art, the utility model provides a connecting device for a double-layer polyurethane sound insulation piece.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a connecting device for a double-layer polyurethane sound insulation piece, the double-layer polyurethane sound insulation piece includes an upper cover and a lower cover, including rivets, the upper cover is provided with an upper clamping block, the lower cover is provided with a lower clamping block, and the rivets fix the upper clamping block and the lower clamping block.

[0005] Furthermore, the upper clamping block is integrally formed with the upper cover, and the lower clamping block is integrally formed with the lower cover.

[0006] Furthermore, the rivet includes an end, a straight rod and a stop block, the end and the stop block are fixed on the straight rod, the straight rod connects the upper clamping block and the lower clamping block, and the end and the stop block fix the upper clamping block and the lower clamping block.

[0007] Furthermore, the upper clamping block is provided with a first clamping hole, and the lower clamping block is provided with a second clamping hole. The straight rod is inserted into the first clamping hole and the second clamping hole. The end portion and the stop block are located on both sides of the straight rod. The end portion is in contact with the inlet end face of the first clamping hole, and the stop block is in contact with the outlet end face of the second clamping hole.

[0008] Furthermore, the end portion is smoothly connected to the straight rod via an inclined surface, and the outlet end surface of the first clamping hole is provided with a tapered hole matching the inclined surface.

[0009] Furthermore, a pull rod is provided at the end of the straight rod, and the stop block is located between the straight rod and the pull rod.

[0010] Furthermore, the rivets are made of soft material.

[0011] Furthermore, the rivet includes an end and a straight rod, a second stop block is provided at the end of the straight rod, the end and the second stop block are located on both sides of the straight rod, the second stop block is provided with a plurality of through grooves, the straight rod connects the upper clamping block and the lower clamping block, and the end and the second stop block fix the upper clamping block and the lower clamping block.

[0012] Furthermore, the rivet includes an end portion, a straight rod and a buckle block, the end portion and the buckle block are fixed on the straight rod, the straight rod connects the upper clamping block and the lower clamping block, the end portion and the buckle block fix the upper clamping block and the lower clamping block, and there are two groups of buckle blocks, the two groups of buckle blocks are distributed on both sides of the circumference of the straight rod, the upper clamping block and the lower clamping block are respectively provided with a first clamping hole and a second clamping hole, the straight rod moves along the first clamping hole and the second clamping hole, the first clamping hole and the second clamping hole are respectively provided with limiting holes, and the two groups of buckle blocks move along the limiting holes.

[0013] Furthermore, the connecting device also includes a fastening structure, which fixedly connects the rivet to the lower clamping block.

[0014] In summary, the utility model is beneficial in that:

[0015] 1) The utility model fixes and installs the upper cover and the lower cover of the double-layer polyurethane sound insulation member by means of rivets, which is simple and convenient to operate and effectively improves the installation efficiency of the upper cover and the lower cover.

[0016] 2) The upper clamping block of the utility model is integrally formed with the upper cover, and the lower clamping block is integrally formed with the lower cover. The upper clamping block and the lower clamping block are part of the double-layer polyurethane sound insulation component and are formed synchronously when the PU foam is molded into the product. Compared with the existing method of adding additional processing, the present application is simple to operate, and the outer layer material is generally harder and stronger. The upper clamping block and the lower clamping block are respectively fixed to the outer sound insulation layer. Compared with the existing industrial staples that are directly nailed into the loose polyurethane material for connection, the present application avoids the rivets from directly damaging the double-layer polyurethane sound insulation component, and effectively improves the service life of the double-layer polyurethane sound insulation component. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the assembly of the double-layer polyurethane sound insulation component and the connecting device of the utility model.

[0018] Figure 2 for Figure 1 A is an enlarged schematic diagram.

[0019] Figure 3 for Figure 1 A magnified schematic diagram of B.

[0020] Figure 4 This is a schematic diagram of a pull nail according to the first embodiment of the utility model.

[0021] Figure 5 This is a cross-sectional view of the pull nail, the upper clamping block and the lower clamping block in the first embodiment of the utility model.

[0022] Figure 6 This is a schematic diagram of a pull nail according to the second embodiment of the utility model.

[0023] Figure 7 This is a cross-sectional view of the pull nail, the upper clamping block and the lower clamping block in the second embodiment of the utility model.

[0024] Figure 8 This is a schematic diagram of a pull nail according to the third embodiment of the utility model.

[0025] Fig. 9 This is a cross-sectional view of the pull nail, the upper clamping block and the lower clamping block in the third embodiment of the utility model.

[0026] Markings in the figure: upper cover 11, lower cover 12, rivet 3, upper clamping block 21, lower clamping block 22, first clamping hole 211, second clamping hole 221, end 31, straight rod 32, stop block 33, pull rod 321, second stop block 34, through groove 341, buckle block 35. DETAILED DESCRIPTION

[0027] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0028] Example:

[0029] like Figure 1-Figure 5 As shown, a connecting device of a double-layer polyurethane sound insulation piece, the double-layer polyurethane sound insulation piece includes an upper cover 11 and a lower cover 12, the connecting device includes a rivet 3, the upper cover 11 is provided with an upper clamping block 21, the lower cover 12 is provided with a lower clamping block 22, and the rivet 3 is fixedly connected to the upper clamping block 21 and the lower clamping block 22.

[0030] The double-layer polyurethane sound insulation component is composed of two layers of materials. Specifically, the upper cover 11 and the lower cover 12 are respectively composed of an outer sound insulation layer and an inner sound absorption layer. In order to ensure good sound insulation performance, the outer layer material is generally hard and strong. The upper clamping block 21 and the lower clamping block 22 are respectively fixed to the outer sound insulation layer. The upper clamping block 21 and the lower clamping block 22 are fixedly connected by the rivet 3, thereby realizing the fixed installation of the upper cover 11 and the lower cover 12.

[0031] In this embodiment, the upper clamping block 21 is integrally formed with the upper cover 11, and the lower clamping block 22 is integrally formed with the lower cover 12. The upper clamping block 21 and the lower clamping block 22 are part of the double-layer polyurethane sound insulation component and are formed simultaneously when the PU foam is molded into the product. Compared with the existing method of adding additional processing, the present application is simple to operate, and the outer material is generally hard and strong. The upper clamping block 21 and the lower clamping block 22 are respectively fixed to the outer sound insulation layer. Compared with the existing industrial staples that are directly nailed into the loose polyurethane material for connection, the present application avoids the rivet 3 from directly damaging the double-layer polyurethane sound insulation component, thereby effectively improving the service life of the double-layer polyurethane sound insulation component.

[0032] The upper clamping block 21 is provided with a first clamping hole 211 , and the lower clamping block 22 is provided with a second clamping hole 221 . The first clamping hole 211 and the second clamping hole 221 are opposite to each other. The rivet 3 passes through the first clamping hole 211 and the second clamping hole 221 and is connected to the upper clamping block 21 and the lower clamping block 22 .

[0033] The rivet 3 is made of soft material, such as silicone, rubber, soft PVC, etc. The soft rivet 3 can effectively avoid wear between the rivet 3 and the upper and lower clamping blocks 21 and 22 during the process of connecting the upper and lower clamping blocks 21 and 22.

[0034] In this embodiment, the rivet 3 includes an end 31, a straight rod 32 and a stop block 33. The end 31 and the stop block 33 are fixed on the straight rod 32. The straight rod 32 connects the upper clamping block 21 and the lower clamping block 22. The end 31 and the stop block 33 fix the upper clamping block 21 and the lower clamping block 22.

[0035] Specifically, the straight rod 32 is inserted into the first clamping hole 211 and the second clamping hole 221 in sequence to preliminarily connect the upper clamping block 21 and the lower clamping block 22. The end 31 and the stop block 33 are located on both sides of the straight rod 32. The distance between the end 31 and the stop block 33 is the same as the distance between the first clamping hole 211 and the second clamping hole 221. The end 31 fits and abuts against the inlet end face of the first clamping hole 211, and the stop block 33 fits and abuts against the outlet end face of the second clamping hole 221. The upper clamping block 21 and the lower clamping block 22 are restricted in the vertical direction by the end 31 and the stop block 33 to achieve a fixed connection between the two.

[0036] The outer diameter of the straight rod 32 is slightly smaller than the inner diameter of the first clamping hole 211 and the second clamping hole 221, so that the straight rod 32 can move in the first clamping hole 211 and the second clamping hole 221 while preventing the upper clamping block 21 and the lower clamping block 22 from shaking in the horizontal direction, thereby effectively realizing the initial connection between the upper clamping block 21 and the lower clamping block 22.

[0037] The size of the end portion 31 is larger than that of the straight rod 32. The end portion 31 and the straight rod 32 are smoothly connected via an inclined surface. The outlet end face of the first clamping hole 211 is provided with a tapered hole matching the inclined surface. The inclined surface fits the tapered hole, and the tapered hole can facilitate the insertion of the straight rod 32.

[0038] The abutment block 33 is configured as a cone block, which is also made of soft material, so that the cone block can move with the straight rod 32 in the first clamping hole 211 and the second clamping hole 221 and penetrate the second clamping hole 221 until the cone block fits and abuts against the outlet end surface of the second clamping hole 221.

[0039] In this embodiment, a pull rod 321 is also provided at the end of the straight rod 32, and the stop block 33 is located between the straight rod 32 and the pull rod 321. The pull rod 321 is used to assist the pull nail 3 in fixing the upper clamping block 21 and the lower clamping block 22. Specifically, during the movement of the straight rod 32 between the first clamping hole 211 and the second clamping hole 221, when the pull rod 321 passes through the second clamping hole 221, the pull rod 321 is pulled downward to accelerate the movement of the straight rod 32, thereby accelerating the speed at which the pull nail 3 fixes the upper clamping block 21 and the lower clamping block 22.

[0040] In the present application, the upper cover 11 and the lower cover 12 of the double-layer polyurethane sound insulation are fixedly installed by using the rivets 3 , which is simple and convenient to operate and effectively improves the installation efficiency of the upper cover 11 and the lower cover 12 .

[0041] Generally speaking, after a double-layer polyurethane sound insulation is installed on a car for noise reduction, that is, after the upper cover 11 and the lower cover 12 are fixedly connected, they will not be disassembled unless necessary. However, after the rivet 3 of this embodiment is disassembled, the corresponding upper clamping block 21 and the lower clamping block 22 will be damaged, so it is not suitable for a double-layer polyurethane sound insulation that is reused after disassembly.

[0042] However, the technical solution of the present application can solve the problem of reusing the double-layer polyurethane sound insulation after disassembly by setting multiple groups of upper clamping blocks 21 and lower clamping blocks 22. Specifically, multiple groups of upper clamping blocks 21 and lower clamping blocks 22 are respectively set, which are divided into a connecting part and a part to be connected. The connecting part is fixedly connected by a rivet 3, and the part to be connected is used for fixing the double-layer polyurethane sound insulation again by the rivet 3 after disassembly.

[0043] Embodiment 2:

[0044] like Figure 6-Figure 7As shown, the difference between this embodiment and the first embodiment is that in the first embodiment, the stop block 33 is set as a cone block, and the end of the straight rod 32 is also provided with a pull rod 321, and the pull rod 321 is used to assist the rivet 3 to fix the upper clamping block 21 and the lower clamping block 22. In this embodiment, a second stop block 34 is provided at the end of the straight rod 32, and the end 31 and the second stop block 34 are located on both sides of the straight rod 32. The second stop block 34 is preferably made of soft material, and the second stop block 34 is provided with a plurality of through grooves 341. When the second stop block 34 is squeezed circumferentially by the upper clamping block 21 and the lower clamping block 22, the second stop block 34 moves inward and the overall size is reduced, thereby facilitating the movement of the rivet 3 in the upper clamping block 21 and the lower clamping block 22. However, after the second stop block 34 passes through the second clamping hole 221, the circumferential force of the second stop block 34 disappears, and the second stop block 34 is reset, thereby abutting against the lower clamping block 22.

[0045] The distance between the end 31 and the second stop block 34 is the same as the distance between the first clamping hole 211 and the second clamping hole 221. The end 31 is fitted and abutted against the inlet end face of the first clamping hole 211, and the second stop block 34 is fitted and abutted against the outlet end face of the second clamping hole 221. The upper clamping block 21 and the lower clamping block 22 are restricted in the vertical direction by the end 31 and the second stop block 34 to achieve a fixed connection between the two.

[0046] Embodiment 3

[0047] like Figure 8-Figure 9 As shown, the difference between this embodiment and the above embodiment is that the rivet 3 of the above embodiment 1 is used for installation but cannot be disassembled without loss, but in this embodiment, the rivet 3 can be disassembled without loss.

[0048] The rivet 3 includes an end 31, a straight rod 32 and a buckle block 35. The end 31 and the buckle block 35 are fixed on the straight rod 32. The straight rod 32 connects the upper clamping block 21 and the lower clamping block 22. The end 31 and the buckle block 35 fix the upper clamping block 21 and the lower clamping block 22.

[0049] There are two groups of buckle blocks 35, which are distributed on both sides of the straight rod 32 in the circumferential direction. The first clamping hole 211 and the second clamping hole 221 are respectively provided with limiting holes 23. The two groups of buckle blocks 35 correspond to the limiting holes 23 and can move along the limiting holes 23.

[0050] When the rivet 35 is in the closed position, the rivet 35 is in the closed position, and the rivet 35 is in the closed position, so that ...

[0051] In order to control the rotation angle of the pull nail 3, preferably, a rotation direction mark and a rotation target position mark can be set on the upper clamping block 21.

[0052] During use of the sound insulation component, the rivet 3 may change under the action of external forces such as vibration, and there is a risk of the rivet 3 falling off. To avoid this risk, the connecting device also includes a fastening structure, which fixes the rivet 3 to the lower clamping block 22.

[0053] The fastening structure can adopt a fastening connection of screws and nuts. Specifically, the straight rod 32 of the rivet 3 is provided with a first threaded hole (not shown in the figure), and the lower clamping block 22 is provided with a second threaded hole (not shown in the figure). When the rivet 3 is rotated to the target position, the first threaded hole and the second threaded hole are relative to each other, and the screw passes through the first threaded hole and the second threaded hole and is tightened by the nut, thereby realizing a fixed connection between the rivet 3 and the lower clamping block 22. When disassembly is required, the nut is loosened, the screw is pulled out, the rivet 3 is rotated so that the buckle block 35 is relative to the limiting hole 23, and the rivet 3 is pulled outward, so that the upper cover 11 and the lower cover 12 can be disconnected and disassembled.

[0054] Preferably, the two groups of buckle blocks 35 are distributed in a mirror image with the axis of the straight rod 32 as the center.

[0055] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A connecting device for a double-layer polyurethane sound insulation member, the double-layer polyurethane sound insulation member comprising an upper cover and a lower cover, characterized in that: It includes a pull nail, an upper cover is provided with an upper clamping block, a lower cover is provided with a lower clamping block, and the pull nail is fixedly connected with the upper clamping block and the lower clamping block.

2. A connection device for a double-layer polyurethane sound insulation member according to claim 1, characterized in that: The upper clamping block is integrally formed with the upper cover, and the lower clamping block is integrally formed with the lower cover.

3. A connection device for a double-layer polyurethane sound insulation member according to claim 1, characterized in that: The rivet comprises an end, a straight rod and a stop block, wherein the end and the stop block are fixed on the straight rod, the straight rod connects the upper clamping block and the lower clamping block, and the end and the stop block fix the upper clamping block and the lower clamping block.

4. A connection device for a double-layer polyurethane sound insulation member according to claim 1, characterized in that: The upper clamping block is provided with a first clamping hole, and the lower clamping block is provided with a second clamping hole. The straight rod is inserted into the first clamping hole and the second clamping hole. The end portion and the stop block are located on both sides of the straight rod. The end portion is in contact with the inlet end face of the first clamping hole, and the stop block is in contact with the outlet end face of the second clamping hole.

5. A connection device for a double-layer polyurethane sound insulation member according to claim 3, characterized in that: The end portion is smoothly connected to the straight rod via an inclined surface, and the outlet end surface of the first clamping hole is provided with a tapered hole matching the inclined surface.

6. A connection device for a double-layer polyurethane sound insulation member according to claim 3, characterized in that: A pull rod is also provided at the end of the straight rod, and the stop block is located between the straight rod and the pull rod.

7. A connection device for a double-layer polyurethane sound insulation member according to claim 1, characterized in that: The rivet is made of soft material.

8. The connecting device of a double-layer polyurethane sound insulation member according to claim 1, characterized in that: The rivet includes an end portion and a straight rod. A second stop block is provided at the end of the straight rod. The end portion and the second stop block are located on both sides of the straight rod. The second stop block is provided with a plurality of through grooves. The straight rod connects the upper clamping block and the lower clamping block. The end portion and the second stop block fix the upper clamping block and the lower clamping block.

9. A connection device for a double-layer polyurethane sound insulation member according to claim 1, characterized in that: The rivet includes an end, a straight rod and a buckle block, the end and the buckle block are fixed on the straight rod, the straight rod connects the upper clamping block and the lower clamping block, the end and the buckle block fix the upper clamping block and the lower clamping block, two groups of buckle blocks are provided, the two groups of buckle blocks are distributed on both sides of the circumference of the straight rod, the upper clamping block and the lower clamping block are respectively provided with a first clamping hole and a second clamping hole, the straight rod moves along the first clamping hole and the second clamping hole, the first clamping hole and the second clamping hole are respectively provided with limiting holes, and the two groups of buckle blocks move along the limiting holes.

10. A connection device for a double-layer polyurethane sound insulation member according to claim 9, characterized in that: The connecting device also includes a fastening structure, which fixedly connects the rivet to the lower clamping block.

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