Composite metal connecting structure of carbon fiber electric scooter

Abstract

A composite material metal connecting structure of a carbon fiber electric scooter comprises a carbon fiber composite material piece and a metal piece which are used for being connected and matched with each other, the carbon fiber composite material piece is provided with an inner threaded hole used for being matched with the metal piece, and the metal piece is provided with an outer thread used for being matched with the inner threaded hole. The metal piece is screwed in the inner threaded hole, and the metal piece and the inner part of the inner threaded hole are coated with structural adhesive; the metal piece is further provided with an inner hole which is conveniently connected with an external structural piece; the depth of the inner threaded hole is larger than the length of the metal piece. The connection strength between the carbon fiber composite material and the metal piece can be effectively improved, the overall reliability and bearing capacity are improved, meanwhile, the requirement for light weight is met, and good popularization significance is achieved.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber electric scooter manufacturing technology, and in particular to a composite metal connection structure for carbon fiber electric scooters. Background Technology

[0002] With increasing awareness of energy conservation and environmental protection, people have more choices for travel. Lightweight and portable electric scooters have become a popular choice among young people, and their light weight and high strength are also effective means to enhance their competitiveness. Carbon fiber composite materials, due to their high strength, light weight, and strong design flexibility, have been applied to electric scooters. However, carbon fiber composite materials inevitably need to be connected to metal parts. In such cases, the connection area is often a weak point under load. Currently, the connection between the metal parts and carbon fiber in carbon fiber scooters is usually achieved through gluing. This can lead to the metal parts easily detaching during riding, affecting safety, and it makes it impossible to accurately test the connection strength after gluing.

[0003] Therefore, in order to solve this problem, the present invention designs a connection structure between carbon fiber composite material and metal parts. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a composite metal connection structure for carbon fiber electric scooters that can effectively improve the connection strength between carbon fiber composite materials and metal parts, enhance overall reliability and load-bearing capacity, and meet the requirements of lightweighting.

[0005] The technical problem to be solved by this utility model is achieved through the following technical solution. This utility model is a composite metal connection structure for a carbon fiber electric scooter. The structure includes a carbon fiber composite material part and a metal part for mutual connection and mating. The carbon fiber composite material part is provided with an internal threaded hole for mating with the metal part, and the metal part is provided with an external thread for mating with the internal threaded hole. The metal part is screwed into the internal threaded hole, and both the metal part and the internal threaded hole are coated with structural adhesive. The metal part is also provided with an internal hole to facilitate connection with external structural components.

[0006] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the composite metal connection structure of the carbon fiber electric scooter described above, the depth of the internal threaded hole is greater than the length of the metal part.

[0007] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the composite metal connection structure of the carbon fiber electric scooter described above, the internal threaded hole is an M10 to M15 threaded hole.

[0008] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the composite metal connection structure of the carbon fiber electric scooter described above, the internal thread of the internal thread hole has the same shape as the external thread.

[0009] The technical problem to be solved by this utility model can also be further achieved through the following technical solutions: for the composite metal connection structure of the carbon fiber electric scooter described above, the shape of the external thread is trapezoidal, triangular, rectangular or arc-shaped.

[0010] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the composite metal connection structure of the carbon fiber electric scooter described above, the outer diameter, inner diameter, pitch diameter, lead, number of threads, helix angle, and tooth angle of the internal thread hole are all the same as those of the external thread.

[0011] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the composite metal connection structure of the carbon fiber electric scooter described above, the inner hole is a threaded inner hole or a smooth inner hole without threads.

[0012] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the composite metal connection structure of the carbon fiber electric scooter described above, the inner hole is a circular hole or a square hole.

[0013] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the composite metal connection structure of the carbon fiber electric scooter described above, the structural adhesive is a high-temperature structural adhesive of epoxy resin or a low-temperature structural adhesive of epoxy resin.

[0014] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the composite metal connection structure of the carbon fiber electric scooter described above, the material of the metal part is stainless steel, aluminum alloy or titanium alloy.

[0015] Compared with the prior art, this utility model sets an external thread on the metal part and an internal thread hole in the carbon fiber composite material part. The external thread of the metal part and the internal thread of the composite material are connected together by applying adhesive. After the connection is made together, the external thread of the metal part and the internal thread hole of the carbon fiber composite material part form a threaded pair, thereby forming a connection between the metal part and the carbon fiber composite material. This utility model has a simple structure, higher strength, and strong design flexibility during manufacturing. It can not only improve production efficiency but also reduce production costs, and has good promotional significance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the carbon fiber composite material part of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the metal part of this utility model. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Reference Figure 1-4 A composite metal connection structure for a carbon fiber electric scooter is disclosed. This structure includes a carbon fiber composite component 1 and a metal component 2 for mutual connection and mating. The two components achieve a high-strength connection through a precise fit design. The carbon fiber composite component 1, with its lightweight, high strength, and corrosion resistance, provides excellent structural support for the electric scooter. The metal component 2, with its good machinability and mechanical properties, meets the requirements for connecting and fixing external structural components. Specifically…

[0022] The carbon fiber composite material part 1 is provided with an internal threaded hole 3 for mating with the metal part 2, and the metal part 2 is provided with an external thread 4 for mating with the internal threaded hole 3. The depth of the internal threaded hole 3 is greater than the length of the metal part 2 to ensure that the metal part 2 can be completely screwed into the hole to form a stable mechanical connection. The internal threaded hole 3 has a wide range of specifications, from M10 to M15, and can be flexibly selected according to actual needs.

[0023] Secondly, the internal thread of the internal threaded hole 3 has the same shape as the external thread 4, ensuring a tight fit between the two. The external thread 4 has various shapes, such as trapezoidal, triangular, rectangular, or arc-shaped, and the choice of these shapes depends on the required connection strength, sealing performance, and ease of processing.

[0024] More importantly, the internal thread of the internal thread hole 3 and the external thread 4 are consistent in key parameters such as outer diameter, inner diameter, pitch diameter, pitch, lead, number of threads, helix angle, and tooth angle, which further ensures the accuracy and reliability of the connection.

[0025] To further enhance the connection strength, the metal part 2 is screwed into the internal threaded hole 3, and both the metal part 2 and the internal threaded hole 3 are coated with structural adhesive. The structural adhesive is an epoxy resin-based adhesive, which features high strength, good chemical resistance, good heat resistance, good adhesion, and good water resistance, enabling it to be used in harsh environments such as high temperature and high humidity. In practical applications, either a high-temperature epoxy resin-based structural adhesive or a low-temperature epoxy resin-based structural adhesive can be selected as needed.

[0026] Epoxy resin-based high-temperature structural adhesives are high-temperature curing adhesives. They have excellent bonding performance and strength and can be used in high-temperature and highly corrosive environments. However, high-temperature curing adhesives require high-temperature conditions to cure, which places high demands on the usage conditions.

[0027] Epoxy resin-based low-temperature structural adhesives are low-temperature curing adhesives with short curing time, good flexibility and impact resistance. They can be cured at normal temperatures, but their high-temperature resistance and corrosion resistance are relatively poor.

[0028] Based on the characteristics of epoxy resin adhesives mentioned above, different adhesives can be selected according to different environments.

[0029] In actual use, the metal part 2 is also provided with inner holes 5 to facilitate connection with external structural parts. These inner holes 5 can be threaded or smooth without threads. The shape of the inner holes 5 can be round or square to adapt to different connection methods and structural requirements.

[0030] In this structure, the metal component 2 is made of stainless steel, aluminum alloy, or titanium alloy. Stainless steel is known for its excellent corrosion resistance and mechanical properties; aluminum alloy has the advantages of being lightweight, high-strength, and easy to process; titanium alloy is the preferred material for high-end applications due to its high strength, low density, and good corrosion resistance. The appropriate material for the metal component 2 can be selected according to different application scenarios and requirements.

[0031] The actual use process of the composite metal connection structure for the carbon fiber electric scooter provided by this utility model is as follows:

[0032] 1. Preparation of metal parts 2:

[0033] Prepare the corresponding metal part 2 as needed. This metal part 2 is round and has external threads 4. Sandblast the metal part 2 and clean it.

[0034] 2. Fabrication of carbon fiber composite part 1:

[0035] Drill the required hole diameter according to the required thread size, then tap the required internal thread hole 3, and clean it for later use;

[0036] 3. Apply adhesive:

[0037] Apply adhesive to the threaded surface of the external thread 4 connecting the internal threaded hole 3 of the carbon fiber composite part 1 and the metal part 2.

[0038] 4. Solidify the connection;

[0039] Under the action of external force, the metal part 2 with external thread 4 is gradually screwed into the internal thread hole 3 of the carbon fiber composite part 1, so that the external thread 4 of the metal part 2 and the internal thread of the internal thread hole 3 are integrated to form a threaded pair. After the adhesive is cured, the connection between the carbon fiber composite part 1 and the metal part 2 can be completed.

[0040] In summary, the connection structure of this application is simple in structure, can be applied to products with a large number of metal parts 2 in carbon fiber composite materials, and can improve the stability of the connection, with strong controllability of strength and strong detectability, thus perfectly solving the drawbacks of connecting composite materials and metal parts 2.

Claims

1. A composite metal connection structure of a carbon fiber electric kick scooter, characterized by: The structure comprises carbon fiber composite pieces and metal pieces for mutual connection and cooperation, the carbon fiber composite pieces are provided with internally threaded holes for cooperation with the metal pieces, the metal pieces are provided with external threads for cooperation with the internally threaded holes, the metal pieces are screwed into the internally threaded holes, and the metal pieces and the internally threaded holes are coated with structural glue; the metal pieces are further provided with inner holes for connection with external structural pieces.

2. The carbon fiber electric kick scooter composite metal connection structure of claim 1, wherein: The depth of the internally threaded holes is greater than the length of the metal pieces.

3. The carbon fiber electric kick scooter composite metal connection structure according to claim 1 or 2, characterized in that: The internally threaded holes are M10-M15 threaded holes.

4. The carbon fiber electric kick scooter composite metal connection structure of claim 1, wherein: The internal threads of the internally threaded holes are consistent with the external threads.

5. The carbon fiber electric kick scooter composite metal connection structure according to claim 1 or 4, characterized in that: The external threads are trapezoidal, triangular, rectangular or circular arc-shaped.

6. The carbon fiber electric kick scooter composite metal connection structure of claim 1, wherein: The internal threads of the internally threaded holes are consistent with the external diameter, internal diameter, pitch diameter, pitch, lead, number of threads, helix angle and tooth angle of the external threads.

7. The carbon fiber electric kick scooter composite metal connection structure of claim 1, wherein: The inner holes are threaded inner holes or smooth inner holes without threads.

8. The carbon fiber electric kick scooter composite metal connection structure according to claim 1 or 7, characterized in that: The inner holes are circular holes or square holes.

9. The carbon fiber electric kick scooter composite metal connection structure of claim 1, wherein: The structural glue is high-temperature structural glue or low-temperature structural glue of epoxy resin type.

10. The carbon fiber electric kick scooter composite metal connection structure of claim 1 or 9, wherein: The metal pieces are made of stainless steel, aluminum alloy or titanium alloy.

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