Hidden type composite top bolt embedded structure

Abstract

The utility model relates to a hidden type composite top bolt pre-embedded structure, which belongs to the technical field of passenger car composite top covers and comprises a composite top cover and a bolt, the composite top cover comprises a section bar and a composite material, the composite material is coated on the periphery of the section bar, the side wall of the section bar and the composite material are adhered through structural adhesive, and the bolt is embedded in the composite top cover. A wedge block is fixedly connected in the section bar, a tapping hole is formed in the wedge block, a mounting hole communicated with the tapping hole in position is formed in the top of the section bar, a process hole is formed in the bottom of the section bar, the bolt is matched with threads of the tapping hole, and the bolt penetrates through the wedge block and the top of the section bar from bottom to top through the tapping hole and the mounting hole. The aluminum profile is embedded in the composite top cover, the wedge block is arranged in the aluminum profile, the wedge block is provided with the tapping hole, the bolt is installed in the tapping hole of the wedge block from the interior of the profile, and therefore the purpose of reserving the bolt is achieved, strength is high, bolt installation is reliable, machining and forming are simple, and batch production is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of passenger car composite roof covers, in particular to a hidden composite roof bolt embedded structure. Background Art

[0002] Lightweighting technology has always been a key component in promoting automotive energy conservation and emission reduction. In recent years, with the advancement of China's "dual carbon" goals, the demand for lightweighting has become even more urgent. The body, as the most crucial component of vehicle mass, is considered a breakthrough point in bus lightweighting. With the application of new materials and breakthroughs in new technologies, the lightweight design of bus composite roofs has rapidly developed.

[0003] Despite the rapid development of composite bus roofs, some challenges remain. Because the batteries are located on top of buses, the number of embedded bolts on the roof is enormous. Ensuring the strength of these bolts while also ensuring adequate mounting conditions for other components has long been a challenge. Because the composite roof's core is foam, welding bolts like traditional frame-skinned roofs with brackets is impossible.

[0004] At present, the early top mounting bolts are mostly welded on the embedded plates, and the embedded plates are directly glued to the upper surface of the top cover. This method is mostly used to install components with small stress and low requirements on the installation plane. The stress strength is weak and the embedded plates are exposed, making it difficult to install high-strength components such as air conditioners and batteries. Therefore, a hidden composite top bolt embedded structure is urgently needed to solve the current status of composite top embedded bolts. Utility Model Content

[0005] The purpose of the utility model is to provide a hidden composite top bolt embedded structure, that is, embedded bolts on the composite top cover, which ensures the strength of the bolts while preventing the embedded brackets and bolt heads from leaking out, so as to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A hidden composite top bolt embedded structure includes a composite top cover and a bolt. The composite top cover includes a profile and a composite material. The composite material is coated around the profile. The side wall of the profile and the composite material are bonded by structural adhesive. A wedge is fixedly connected to the inside of the profile. A tapped hole is provided on the wedge. A mounting hole communicating with the position of the tapped hole is provided on the top of the profile. A process hole is provided at the bottom of the profile. The bolt matches the thread of the tapped hole. The bolt passes through the tapped hole and the mounting hole from bottom to top through the wedge and the top of the profile.

[0008] Preferably, the wedge block is fixedly connected to the top of the profile, and the tapped hole is connected to the mounting hole.

[0009] Preferably, the profile is an aluminum profile.

[0010] Preferably, the composite material is foam material.

[0011] Preferably, the wedge is made of high-strength steel by wire cutting. Wire cutting is flexible and controllable and can adapt to various curvatures of the composite roof to ensure that the bolts can be installed vertically.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model adopts an aluminum profile embedded in the composite top cover, the aluminum profile is provided with a wedge block inside, the wedge block has a tapped hole, and the bolts are installed in the tapped holes of the wedge block from the inside of the profile to achieve the purpose of reserving bolts, the profile, wedge block and bolt head are all hidden inside the composite top cover to achieve the purpose of hiding and not leaking out, and at the same time ensure the installation strength of the bolt, which can meet the requirement of flatness of the top and bottom surfaces and does not affect the installation of other components; the wedge block is cut from high-strength steel wire, has high overall strength, and can install larger loads; the hidden composite top bolt embedded structure of the utility model has high strength, reliable bolt installation, simple processing and forming, and is easy to mass produce. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a side sectional view of the utility model.

[0016] Reference numerals

[0017] 1. Composite material, 2. Aluminum profile, 201. Mounting hole, 202. Process hole, 3. Wedge, 301. Tapped hole, 4. Bolt. DETAILED DESCRIPTION

[0018] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0019] like Figure 1-2 As shown, taking the embedded bolt 4 in one of the composite top cover as an example for partial description, a hidden composite top bolt 4 embedded structure includes a composite top cover and a bolt 4, the composite top cover includes an aluminum profile 2 and a composite material 1, and the composite material 1 is a foam material; in this embodiment, the profile adopts an aluminum profile 2 and the composite material 1 adopts a foam material, but the utility model is not limited to aluminum profiles and foam materials.

[0020] The composite material 1 is wrapped around the aluminum profile 2, and the side wall of the aluminum profile 2 and the composite material 1 are bonded by structural adhesive. A wedge block 3 is fixedly connected to the top of the aluminum profile 2. The wedge block 3 is made of high-strength steel through wire cutting. The wire cutting is flexible and controllable and can adapt to various curvatures of the composite top cover to ensure that the bolt 4 can be installed vertically; a tapping hole 301 is provided on the wedge block 3, and a mounting hole 201 connected to the position of the tapping hole 301 is provided on the top of the aluminum profile 2. A process hole 202 is provided at the bottom of the profile. The bolt 4 matches the thread of the tapping hole 301. The bolt 4 passes through the tapping hole 301 and the mounting hole 201 from bottom to top through the wedge block 3 and the top of the profile, and then is tightened through the process hole 202 opened at the bottom of the profile. The overall manufacturing method is simple and easy to operate.

[0021] The utility model is not limited to the application of pre-embedding bolts 4 on composite roofs. The wedge block 3 is cut from thick steel and can be symmetrically formed in two pieces at a time, which has high processing efficiency. The wedge block 3 is made of high-strength steel with thick walls. After composite, the overall strength is high, so it can meet the strength requirements of various pre-embedded bolts on the composite roof.

[0022] The utility model adopts an embedded aluminum profile 2 in the composite top cover, the aluminum profile 2 has a wedge block 3 inside, the wedge block 3 has a tapped hole 301, and the bolt 4 is installed in the tapped hole 301 of the wedge block 3 from the inside of the profile, thereby achieving the purpose of reserving the bolt 4, the aluminum profile 2, the wedge block 3 and the bolt 4 head are all hidden inside the composite top cover to achieve the purpose of hiding and not leaking out, and at the same time ensure the installation strength of the bolt 4, which can meet the requirement of flatness of the top and bottom surfaces and does not affect the installation of other components; the wedge block 3 is cut from high-strength steel wire, has high overall strength, and can install a larger load; the hidden composite top bolt 4 embedded structure of the utility model has high strength, reliable installation of the bolt 4, simple processing and forming, and is easy to mass produce.

[0023] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A hidden composite top bolt embedded structure, characterized by: It includes a composite top cover and bolts. The composite top cover includes a profile and a composite material. The composite material is coated around the profile. The side wall of the profile and the composite material are bonded by structural adhesive. A wedge is fixedly connected to the inside of the profile. A tapped hole is provided on the wedge. A mounting hole communicating with the tapped hole is provided on the top of the profile. A process hole is provided at the bottom of the profile. The bolt matches the thread of the tapped hole. The bolt passes through the tapped hole and the mounting hole from bottom to top through the wedge and the top of the profile.

2. The hidden composite top bolt embedded structure according to claim 1, characterized in that: The wedge block is fixedly connected to the top of the profile, and the tapping hole is connected to the mounting hole.

3. The hidden composite top bolt embedded structure according to claim 1, characterized in that: The profile is an aluminum profile.

4. The hidden composite top bolt embedded structure according to claim 1, characterized in that: The composite material is made of foam.

5. The hidden composite top bolt embedded structure according to claim 1, characterized in that: The wedge block is made of high-strength steel through wire cutting.

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