Protective structure for an electric bicycle and electric bicycle

Abstract

The application provides a protection structure for an electric bicycle and the electric bicycle, and the protection structure has a first covering area and a second covering area, and comprises a first material layer, a second material layer, and the first material layer is arranged in the first covering area, and the first covering area is an area with a first curvature; the second material layer is arranged in the second covering area, and the second covering area is a planar area, a folded surface area or a second curvature area; the fire resistance temperature of the second material layer is higher than that of the first material layer, and the area of the second covering area is larger than that of the first covering area. The protection structure of the embodiment of the application uses the first material layer for the first covering area with the first curvature, and uses the second material layer for the second covering area with the planar, folded surface or second curvature, and through the cooperation of the two material layers, the appearance requirement of the protection structure can be ensured, and the fireproof performance of the protection structure can be improved.

Description

Technical Field

[0001] This application belongs to the field of protective technology, specifically, this application relates to a protective structure for an electric bicycle and an electric bicycle. Background Technology

[0002] Existing electric bicycle protective structures mostly use general-purpose engineering plastics as covering and supporting components. Although these materials have advantages such as being lightweight and easy to mold, and can match the appearance requirements of electric bicycles.

[0003] However, engineering plastics generally have insufficient flame retardant properties, making them prone to ignition under conditions such as high temperature or electric arc failure, and releasing a large amount of toxic gases during combustion, making it difficult for protective structures to balance protective functions and safety. Utility Model Content

[0004] One objective of this application is to provide a protective structure for electric bicycles and a new technical solution for electric bicycles.

[0005] According to a first aspect of the embodiments of this application, a protective structure for an electric bicycle is provided, the protective structure having a first covering area and a second covering area, the protective structure comprising:

[0006] A first material layer is disposed on the first covered area, and the first covered area is an area with a first curvature;

[0007] A second material layer is disposed on the second covering area, which is a planar area, a folded area, or a second curved area;

[0008] The fire resistance temperature of the second material layer is higher than that of the first material layer, and the area of ​​the second covering region is larger than that of the first covering region.

[0009] Optionally, the density of the second material layer is less than 2.0 × 10⁻⁶. 3 kg / m 3 .

[0010] Optionally, the first material layer is a plastic material layer.

[0011] Optionally, the second material layer is a splicing layer of one or both of aluminum cone core plates and aluminum honeycomb plates.

[0012] Optionally, the first covering area includes the front area and the rear area, and the second covering area includes the windshield area;

[0013] The first material layer forms a hood, a front body side panel, a front fender, and a rear fender. The hood, the front body side panel, and the front fender are located in the front area of ​​the vehicle, and the rear fender is located in the rear area of ​​the vehicle. The second material layer forms a windshield, which is disposed inside the front body side panel.

[0014] Optionally, the first covered area includes a central side area, and the second covered area includes a foot pedal area;

[0015] The first material layer forms a middle vehicle body side panel, and the second material layer forms a foot pedal, which is disposed inside the middle vehicle body side panel.

[0016] Optionally, the first covering area includes a first main body area and a rear side area, and the second covering area includes a second main body area and a taillight area;

[0017] The first material layer forms a protective frame and a rear vehicle side panel. The protective frame is connected to the middle vehicle side panel through the rear vehicle side panel and has a front recessed area and a rear mounting area. The second material layer forms a front skid plate and a taillight plate. The front skid plate surrounds the front recessed area, and the taillight plate is connected to the rear mounting area.

[0018] Optionally, the front guard plate is a bent plate; or,

[0019] The front guard plate includes multiple sub-plates, which are spliced ​​together to form the front guard plate.

[0020] Optionally, a battery compartment is provided in the first main body area, and a battery protection plate is formed in the second material layer, the battery protection plate surrounding the battery compartment.

[0021] According to a second aspect of the embodiments of this application, an electric bicycle is provided, including the protective structure described in the first aspect.

[0022] One technical advantage of this application is:

[0023] This application provides a protective structure for electric bicycles. The protective structure has a first covering area and a second covering area. The protective structure includes a first material layer disposed in the first covering area, which is a region with a first curvature; and a second material layer disposed in the second covering area, which is a planar region, a folded region, or a region with a second curvature. The fire resistance temperature of the second material layer is higher than that of the first material layer, and the area of ​​the second covering area is larger than that of the first covering area. This application's protective structure uses the first material layer in the first covering area with a first curvature and the second material layer in the planar, folded, or second curvature second covering area. Through the combination of these two material layers, both the appearance requirements of the protective structure and its fire resistance performance can be guaranteed.

[0024] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0026] Figure 1 A schematic diagram of a protective structure for an electric bicycle provided in one embodiment of this application. Figure 1 ;

[0027] Figure 2 A schematic diagram of a protective structure for an electric bicycle provided in one embodiment of this application. Figure 2 ;

[0028] Figure 3 A schematic diagram of a battery compartment for a protective structure for an electric bicycle, provided as an embodiment of this application;

[0029] Figure 4 A schematic diagram of a protective structure for an electric bicycle provided in one embodiment of this application. Figure 3 .

[0030] The components are as follows: 1. First material layer; 11. Front hood; 12. Front body side panel; 13. Front mudguard; 14. Rear mudguard; 15. Middle body side panel; 16. Protective frame; 17. Rear body side panel; 2. Second material layer; 21. Front windshield; 22. Foot pedal; 23. Front skid plate; 24. Taillight panel; 25. Battery protection plate; 26. Seat cushion base plate. Detailed Implementation

[0031] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0032] The embodiments of this application will now be described in detail, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0034] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0037] In related technologies, electric bicycle protective structures mostly use general engineering plastics as covering and supporting components. However, the flame retardant properties of engineering plastics are generally insufficient, and they are easily ignited under conditions such as high temperature or electric arc failure. In addition, they release a large amount of toxic gases during combustion, making it difficult for the protective structure to take into account both protective function and safety.

[0038] The protective structure for electric bicycles provided in this application uses a first material layer for a first covering area with a first curvature, and a second material layer for a second covering area with a plane, a folded surface, or a second curvature. By combining the two material layers, the appearance requirements of the protective structure can be guaranteed, and the fire resistance performance of the protective structure can be improved.

[0039] Reference Figure 1 This application provides a protective structure for electric bicycles, the protective structure having a first covering area and a second covering area, the protective structure including:

[0040] A first material layer 1 is disposed in a first covering area, which is a region with a first curvature;

[0041] The second material layer 2 is disposed in the second covering area. The second covering area is a planar area, a folded area, or a second arc area. The folded area can be an area formed by splicing multiple planes or an area formed by bending and connecting multiple planes.

[0042] The fire resistance temperature of the second material layer 2 is higher than that of the first material layer 1, and the area of ​​the second covering region is larger than that of the first covering region.

[0043] In the above embodiments, by dividing the protective structure into different coverage areas, different materials and shapes can be used to design for the characteristics and needs of different areas, thereby optimizing the overall performance of the protective structure.

[0044] See Figure 1 The first material layer 1 can be used for the first covering area with a first curvature. Considering that these areas need to match the shape and size of other structures in electric bicycles, and that the materials in these areas may be subjected to specific stresses or impacts during use, a curved material is required, which helps improve the appearance matching and protective effectiveness of the protective structure. The second material layer 2 can be used for the second covering area that is flat, folded, or has a second curvature. These areas have higher requirements for flame retardant performance. By selecting materials suitable for the characteristics of these areas, the fire resistance and protective performance of the protective structure can be further optimized.

[0045] In the above embodiments, the fire resistance temperature of the second material layer 2 can reach 1000-2000℃. The fire resistance temperature is the highest temperature at which a material can maintain its physical and chemical properties stable under high-temperature conditions without significant deformation, combustion, decomposition, or loss of structural integrity. By selecting a second material layer 2 with a high fire resistance temperature, the safety of the protective structure under extreme conditions such as high temperature or arc faults can be significantly enhanced, reducing the risk of igniting the protective structure.

[0046] In the above embodiments, the second covering area where the second material layer 2 is applied can be an area on the electric bicycle that is not easily bumped. By selecting the lightweight and flame-retardant second material layer 2 as the material for this area, the fire resistance of the protective structure can be improved while reducing the overall weight of the protective structure.

[0047] In one embodiment, the area of ​​the second covering region is larger than the area of ​​the first covering region. For example, the area of ​​the second covering region is 120%, 150%, 180%, or 200% of the area of ​​the first covering region, so as to replace the material of the planar, folded, or second curved areas in the protective structure with the second material layer 2 as much as possible, thereby achieving the flame retardancy and safety of the protective structure.

[0048] The protective structure of this application uses a first material layer 1 for a first covering area with a first curvature, and a second material layer 2 for a second covering area with a plane, a folded surface, or a second curvature. By combining the two material layers, the appearance requirements of the protective structure can be guaranteed, and the fire resistance performance of the protective structure can be improved.

[0049] It is worth noting that the planar area used in the second material layer 2 is not only a strictly geometrically flat surface, but also includes local non-flat surfaces caused by the flatness of the material itself, errors in the connection position, and installation deformation.

[0050] In one embodiment, the density of the second material layer 2 is less than 2.0 × 10⁻⁶. 3 kg / m 3 .

[0051] In the above embodiments, the second material layer 2 can be an aluminum cone core plate, an aluminum honeycomb plate, or a magnesium alloy plate, and the density of the second material layer 2 is less than 2.0 × 10⁻⁶. 3 kg / m 3 The use of a lightweight second material layer 2 ensures the strength of the protective structure while making it lightweight and flame-retardant, thus combining the lightweight, protective function, and safety of the protective structure in electric bicycles.

[0052] In the above embodiments, by replacing part of the first material layer 1 with a second material layer 2 that has a lower density, the weight of the protective structure can be reduced while ensuring the protective function of the protective structure. This not only helps to improve the energy efficiency and driving performance of electric bicycles, but also meets the needs of modern transportation for energy conservation, emission reduction and efficient operation.

[0053] In one embodiment, the density of the second material layer 2 is less than 0.8 × 10⁻⁶. 3 kg / m 3 This ensures that the density of the second material layer 2 is less than that of the first material layer 1. For example, the density of the second material layer 2 can be less than that of plastic parts such as ABS (acrylonitrile-butadiene-styrene copolymer), PC (polycarbonate), PP (polypropylene) and PMMA (polymethyl methacrylate), thus ensuring the lightweight of the protective structure.

[0054] In one embodiment, the first material layer 1 is made of ABS, the second material layer 2 is made of aluminum cone core plate, and the area of ​​the second covering area is 120% of the area of ​​the first covering area. By cutting the lightweight second material layer 2 and assembling it with the first material layer 1, for example by connecting the second material layer 2 and the first material layer 1 with screws, the overall weight of the electric bicycle can be less than 55kg (actual weight 54kg), and the weight of the ABS plastic parts is less than 5.5% of the overall weight (actual percentage 5.3%). The entire electric bicycle can be designed with a full-coverage system through the cooperation of the first material layer 1 and the second material layer 2.

[0055] In one embodiment, the first material layer 1 is a plastic material layer.

[0056] In the above embodiments, the material of the first material layer 1 can be selected from ABS (acrylonitrile-butadiene-styrene copolymer), PC (polycarbonate), PP (polypropylene) or PMMA (polymethyl methacrylate). The plastic material layer has good plasticity and toughness, and can match the first covering area with the first curvature to ensure the sealing and protective effect of the protective structure.

[0057] Moreover, when an electric bicycle is impacted, the plastic material layer can deform to absorb and disperse the impact force, protecting the internal components of the electric bicycle from damage.

[0058] In some embodiments, the second material layer 2 is a splicing layer of one or more of aluminum cone core plates, aluminum honeycomb plates and magnesium alloy plates. That is, the entire second material layer 2 or a single plate in the second material layer 2 can be any one of aluminum cone core plates, aluminum honeycomb plates and magnesium alloy plates, or the entire second material layer 2 or a single plate in the second material layer 2 can be spliced ​​together from aluminum cone core plates, aluminum honeycomb plates and magnesium alloy plates.

[0059] In the above embodiments, the aluminum cone core plate and aluminum honeycomb plate have low density, reducing the weight of the protective structure and helping to improve the energy efficiency and driving performance of electric bicycles. Furthermore, the aluminum cone core plate and aluminum honeycomb plate materials have high strength and stiffness, providing sufficient structural support and protection while ensuring lightweight construction.

[0060] In addition, aluminum cone core plates and aluminum honeycomb plates have high fire resistance, which can meet the requirements for safe use under extreme conditions such as high temperature of battery or electric arc failure, and ensure the fire resistance performance of the protective structure.

[0061] In the above embodiments, magnesium alloy plates are characterized by low density and high specific strength. While meeting the strength requirements of structural materials, magnesium alloy plates can significantly reduce the weight of structural components, and their specific strength is much higher than that of steel and aluminum alloys. Moreover, magnesium alloys have good machinability and can be processed into planar areas, folded areas, or first-curved areas, providing more processing flexibility for the second material layer 2.

[0062] In one embodiment, the thickness of the second material layer 2 ranges from 3 to 6 mm. This ensures sufficient structural strength while controlling the weight of the second material layer 2, contributing to the lightweight and fire-resistant properties of the protective structure. Furthermore, this thickness range facilitates material processing and installation, improving production efficiency.

[0063] In one specific embodiment, mounting holes are pre-set on the frame of the electric bicycle. An aluminum cone core plate with an overall thickness of 4mm is used. The surface layer of the aluminum cone core plate has a thickness of 0.9mm, the core body has a thickness of 0.3mm (the overall thickness after bending is 2.7mm), and the bottom layer has a thickness of 0.4mm. The aluminum cone core plate is installed on the frame through the mounting holes by means of flat connection or connection after cutting and bending.

[0064] In the above embodiments, the flat compressive strength of the aluminum cone core plate is greater than or equal to 2 MPa, the fire resistance rating can reach A2 level, the combustion growth rate index is only 9 W / s, the smoke resistance rating reaches S1 level, and the smoke generation rate index is 0 m. 2 / s 2 It has a D0 rating for preventing burning droplets, with no burning droplets / particles within 600 seconds, and a T0 rating for smoke toxicity. It can withstand ambient temperatures from -40℃ to 80℃, ensuring the fire resistance and flame retardant properties of the protective structure.

[0065] In addition, the surface of the aluminum cone core plate can be treated with a high-precision roller coating and baking process, which coats the surface of the aluminum cone core plate with a fluorocarbon resin coating, improving the aluminum cone core plate's ability to resist ultraviolet rays, acid rain, atmospheric corrosion, powdering, and cracking.

[0066] In some embodiments, see Figure 1 and Figure 4 The first coverage area includes the front and rear areas of the vehicle, and the second coverage area includes the windshield area.

[0067] The first material layer 1 forms a hood 11, a front body side panel 12, a front fender 13, and a rear fender 14. The hood 11, the front body side panel 12, and the front fender 13 are located in the front area of ​​the vehicle, and the rear fender 14 is located in the rear area of ​​the vehicle. The second material layer 2 forms a windshield 21, which is disposed inside the front body side panel 12.

[0068] In the above embodiments, the first material layer 1 can be disposed in the front and rear areas of the vehicle, which are typically the parts of an electric bicycle most susceptible to collisions or scratches during operation. Therefore, by disposing of the first material layer 1 in the front and rear areas, effective protection can be provided in these areas, reducing the risk of collision damage to the electric bicycle's protective structure.

[0069] In one specific embodiment, the windshield 21 can be an aluminum conical core plate. The natural oxide film and fluorocarbon coating of aluminum ensure the corrosion resistance of the windshield 21. In another embodiment, since the area where the windshield 21 is located has a low collision risk, the windshield 21 can be a magnesium alloy plate to improve the aesthetic appearance of the windshield area. Additionally, reinforcing ribs can be provided on the windshield 21 to improve its physical support.

[0070] The windshield area is concave relative to the front of the vehicle and the front wheels. While it is less susceptible to direct impacts, it is more vulnerable to wind resistance, stones, and other external factors. Including the windshield area in the second covering area allows the second material layer 2 to withstand wind resistance and block stones, thus enhancing the overall impact resistance of the protective structure.

[0071] See Figure 1 The front hood 11 protects the front area, reducing damage to front components from collisions or scratches, and may also integrate lighting equipment to improve driving safety. The front side panels 12 provide protection for the sides of the vehicle, enhancing structural strength, and may also serve as part of the exterior design. The front fenders 13 prevent mud and water from splashing onto the driver or other parts of the vehicle during driving, keeping the vehicle clean, and may also protect the wheels. The rear fenders 14, similar to the front fenders 13, protect the rear area from mud and water splashes and may also serve as part of the body structure, enhancing rear stability.

[0072] In the above embodiment, the front cover 11, the front side panel 12, and the front fender 13 are located in the front area, and the rear fender 14 is located in the rear area, so that the protective structure can closely fit the shape of the electric bicycle body and provide comprehensive protection. Furthermore, the separate protection for the front and rear areas can be optimized according to the stress characteristics and functional requirements of different areas, thereby improving the protective effect.

[0073] See Figure 1 By placing the front windshield 21 within the front side panel 12 of the vehicle body, a compact and integrated structure can be achieved, improving the driving efficiency of the electric bicycle. Moreover, through the structural cooperation between the front windshield 21 and the front side panel 12, the impact resistance and fire resistance of the front windshield area can be improved while ensuring lightweight design.

[0074] In some embodiments, see Figure 1 and Figure 2 The first covered area includes the central side area, and the second covered area includes the foot pedal area;

[0075] The first material layer 1 forms a middle vehicle side panel 15, and the second material layer 2 forms a foot pedal 22, which is disposed inside the middle vehicle side panel 15.

[0076] In the above embodiment, the middle side area of ​​the electric bicycle is the intermediate connecting section of the vehicle body structure. It is susceptible to lateral collisions (such as scraping against other vehicles or obstacles) or bumps when getting on and off the bicycle. Protecting this area with the middle side panel 15 reduces the probability of side damage and lowers maintenance costs. The footrest area is a crucial part for the rider to place their feet and control the vehicle, requiring both functionality and protection. The footrest 22 is designed to protect this area from the pressure of pedaling, friction with the shoe sole, and potential impacts from splashes of water and stones during riding.

[0077] See Figure 2 The middle side panel 15, as the specific implementation structure of the first material layer 1 in the middle side area, provides structural support for the side of the vehicle body, enhances the rigidity of the body, and makes the vehicle more stable during driving. Simultaneously, the middle side panel 15 can effectively resist external scratches and collisions, protecting the internal structure and components of the vehicle body from damage. The foot pedal 22 is set within the middle side panel 15. While the middle side panel 15 focuses on overall protection and structural support for the side of the vehicle body, the foot pedal 22 meets the rider's pedaling needs and provides special protection for the pedal area. The embedded design of the foot pedal 22 within the middle side panel 15 helps to enhance the connection strength between the foot pedal 22 and the middle side panel 15, improving the reliability of the pedal component. In this embodiment, the middle side panel 15 and the foot pedal 22 work together to ensure both the safety and stability of the vehicle body structure and to meet the rider's functional requirements for the pedal component.

[0078] In some embodiments, see Figure 1 and Figure 2 The first covering area includes a first main body area and a rear side area, and the second covering area includes a second main body area and a taillight area;

[0079] The first material layer 1 has a protective frame 16 and a rear vehicle side panel 17. The protective frame 16 is connected to the middle vehicle side panel 15 through the rear vehicle side panel 17 and has a front recessed area and a rear mounting area. The second material layer 2 has a front guard plate 23 and a taillight plate 24. The front guard plate 23 surrounds the front recessed area, and the taillight plate 24 is connected to the rear mounting area.

[0080] In the above embodiments, the first main body area and the rear side area ensure that important parts of the electric bicycle frame are adequately protected. The first main body area typically covers the main structural parts of the frame, while the rear side area is prone to scratches or collisions during riding and parking. Covering these two areas can effectively reduce damage to the frame and extend the vehicle's lifespan. The second main body area works in conjunction with the first main body area to ensure the normal operation and safe use of structures such as batteries within the second and first main body areas. In addition, the taillight area is an important safety feature of the electric bicycle. Covering it not only protects the taillight from damage but also improves its stability and reliability, ensuring driving safety at night or in low-light conditions.

[0081] See Figure 2 The protective frame 16, as an important component of the seat structure, provides a supporting structure for the vehicle body, enhancing its overall rigidity and resistance to deformation, making the electric bicycle more stable during operation. The rear side panel 17 connects the protective frame 16 with the middle side panel 15, forming a complete vehicle body protection system. This not only makes the vehicle body structure more compact and stable but also achieves coordinated protection between different components, improving the overall protective performance of the vehicle body.

[0082] Meanwhile, the front recessed area of ​​the protective frame 16 provides space for the installation of the front skid plate 23, making the layout of the body components more reasonable and helping to improve the compactness and space utilization of the whole vehicle. The rear mounting area provides a fixed position for the installation of components such as the taillight plate 24, which facilitates the installation and maintenance of components.

[0083] See Figure 2 The front skid plate 23 surrounds the front recessed area of ​​the protective frame 16, protecting the components within the recessed area from impacts or scratches from external objects. Simultaneously, the front skid plate 23 also serves as part of the vehicle's exterior decoration, enhancing the overall visual appeal. The taillight plate 24 connects to the rear mounting area of ​​the protective frame 16, securing and protecting the taillights to ensure their proper functioning.

[0084] In one embodiment, the taillight plate 24 can be an aluminum conical core plate. The natural oxide film and fluorocarbon coating of aluminum ensure the corrosion resistance of the taillight plate 24. In another embodiment, since the area where the taillight plate 24 is located has a low collision risk, the taillight plate 24 can be a magnesium alloy plate to enhance its decorative function and make the rear of the vehicle more aesthetically pleasing. Additionally, reinforcing ribs can be provided on the taillight plate 24 to improve its physical support.

[0085] In some embodiments, see Figure 4 The front skid plate 23 is a bent plate; or,

[0086] The front guard plate 23 includes multiple sub-plates, which are spliced ​​together to form the front guard plate.

[0087] In one embodiment, the front skid plate 23 can be a bent plate formed by bending a single sheet. The bent plate increases the rigidity and deformation resistance of the front skid plate 23, making it less prone to deformation or damage when subjected to external impacts, thus better protecting the stability of the electric bicycle's internal structure. Furthermore, the bent plate can be precisely bent according to the shape of the front of the electric bicycle to better fit the vehicle's contours, resulting in a smoother and more aesthetically pleasing appearance. It also reduces wind resistance during riding, improving the electric bicycle's driving efficiency and range.

[0088] In another embodiment, the front guard plate 23 is formed by splicing multiple sub-plates. The size and shape of each sub-plate can be flexibly adjusted according to the specific shape and size of the front of the electric bicycle to ensure a good fit of the front guard plate 23. This allows the front guard plate 23 to adapt to different styles and sizes of electric bicycles, improving the product's versatility and applicability.

[0089] In some embodiments, see Figure 2 and Figure 3 The seat base plate 26 and the tail plate in the electric bicycle can also use a second material layer 2 to improve the flame retardant performance of the protective structure; moreover, the seat base plate 26 is provided with grooves or through holes to achieve weight reduction. In addition, the controller housing can also use a second material layer 2 to ensure the safety of the controller.

[0090] In some embodiments, see Figure 3 A battery compartment is set in the first main area, and a battery protection plate 25 is formed in the second material layer 2, which surrounds the battery compartment.

[0091] In the above embodiments, a battery compartment is provided in the first main body area, making full use of the main structural space of the vehicle body, resulting in a more rational battery layout. This helps optimize the overall structural design of the electric bicycle, ensures a uniform distribution of the vehicle's center of gravity, and improves driving stability and handling. The battery compartment relatively isolates the battery from the external environment, reducing the possibility of the battery being affected by adverse factors such as external collisions, scratches, dust, and moisture, thereby extending the battery's lifespan and ensuring stable battery performance.

[0092] See Figure 3 As part of the second material layer 2, the battery protection board 25 surrounds the battery compartment, providing physical protection for the battery. The battery protection board 25 can withstand external impacts, preventing damage to the battery due to bumps and collisions during electric bicycle operation, ensuring the battery's normal operation. In addition, the battery protection board 25 may also have heat insulation properties, reducing the impact of high external temperatures on the battery and extending its lifespan in high-temperature environments.

[0093] In one embodiment, see Figure 3 The upper structure of the battery compartment has high and low surfaces and a certain curvature. The upper structure of the battery compartment can be formed by metal die casting to ensure the structural strength and shape requirements of the upper structure of the battery compartment.

[0094] This application also provides an electric bicycle that includes the aforementioned protective structure.

[0095] In the above embodiments, the protective structure of the electric bicycle uses a first material layer 1 for a first covering area with a first curvature, and a second material layer 2 for a second covering area with a plane, a folded surface, or a second curvature. Through the combination of the two material layers, the appearance requirements of the protective structure can be guaranteed, the lightweight of the protective structure can be achieved, and the fire resistance of the protective structure can be improved.

[0096] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A protective structure for electric bicycles, characterized in that, The protective structure has a first covering area and a second covering area, the protective structure comprising: A first material layer (1) is disposed in the first covered area, and the first covered area is a region with a first curvature; The second material layer (2) is disposed in the second covering area, which is a planar area, a folded area or a second arc area; The fire resistance temperature of the second material layer (2) is higher than that of the first material layer (1), and the area of ​​the second covering area is larger than that of the first covering area.

2. The protective structure according to claim 1, characterized in that, The density of the second material layer (2) is less than 2.0 × 10⁻⁶. 3 kg / m 3 .

3. The protective structure according to claim 1, characterized in that, The first material layer (1) is a plastic material layer.

4. The protective structure according to claim 1, characterized in that, The second material layer (2) is one or more splicing layers of aluminum cone core plate, aluminum honeycomb plate and magnesium alloy plate.

5. The protective structure according to any one of claims 1-4, characterized in that, The first covered area includes the front area and the rear area of ​​the vehicle, and the second covered area includes the windshield area; The first material layer (1) forms a hood (11), a front body side panel (12), a front fender (13), and a rear fender (14). The hood (11), the front body side panel (12), and the front fender (13) are located in the front area of ​​the vehicle, and the rear fender (14) is located in the rear area of ​​the vehicle. The second material layer (2) forms a windshield (21), which is disposed inside the front body side panel (12).

6. The protective structure according to any one of claims 1-4, characterized in that, The first covered area includes a central side area, and the second covered area includes a foot pedal area; The first material layer (1) forms a middle vehicle side panel (15), and the second material layer (2) forms a foot pedal (22), which is disposed inside the middle vehicle side panel (15).

7. The protective structure according to claim 6, characterized in that, The first covering area includes a first main body area and a rear side area, and the second covering area includes a second main body area and a taillight area; The first material layer (1) has a protective frame (16) and a rear vehicle side panel (17). The protective frame (16) is connected to the middle vehicle side panel (15) through the rear vehicle side panel (17) and has a front recessed area and a rear mounting area. The second material layer (2) has a front guard plate (23) and a taillight plate (24). The front guard plate (23) surrounds the front recessed area, and the taillight plate (24) is connected to the rear mounting area.

8. The protective structure according to claim 7, characterized in that, The front guard plate (23) is a bent plate; or, The front guard plate (23) includes multiple sub-plates, which are spliced ​​together to form the front guard plate.

9. The protective structure according to claim 7, characterized in that, A battery compartment is provided in the first main body area, and a battery protection plate (25) is formed on the second material layer (2), the battery protection plate (25) surrounding the battery compartment.

10. An electric bicycle, characterized in that, Includes the protective structure described in any one of claims 1-9.

Images