A double-layer frame structure for a solar electric vehicle

Abstract

The utility model relates to solar electric vehicle technical field especially relates to a double -deck frame structure for solar electric vehicle, including head tube, frame main pipe and frame main body, and frame main body contains upper layer square pipe, lower layer round pipe, side pipe and photovoltaic support pipe. Frame main pipe top end connects head tube bottom, bottom connects upper layer square pipe and lower layer round pipe, upper layer square pipe and lower layer round pipe are parallelly distributed up and down, and upper layer square pipe rear end is connected with side pipe, and lower layer round pipe rear end is connected with side pipe and photovoltaic support pipe respectively, and photovoltaic support pipe rear end is connected with side pipe. The utility model adopts the double -deck bearing frame structure of upper layer square pipe and lower layer round pipe collocation, and cooperates multidirectional reinforcing structure, improves the strength, rigidity and impact resistance of frame, effectively solves the problem that traditional frame is easy to break, deforms, and simultaneously integrates photovoltaic module special mounting structure and multiple component installation station, adapts the functional demand of solar electric vehicle, and gives consideration to reliability and practicality, improves product market competitiveness.

Description

Technical Field

[0001] This utility model relates to the field of solar electric vehicle technology, and in particular to a double-layer frame structure for solar electric vehicles. Background Technology

[0002] Solar photovoltaic electric vehicles have garnered significant attention in the market due to their environmental and energy-saving advantages. As the core load-bearing component of solar electric vehicles, the frame's structural design directly impacts the vehicle's driving safety, stability, handling, and comfort. The frame must meet the stringent testing requirements for vibration, impact, and load stipulated in national standards; improper design can easily lead to problems such as breakage and deformation.

[0003] Currently, most solar-powered electric vehicles, electric mopeds, and electric motorcycles on the market use a single-layer frame structure. Under conditions of complex road conditions, overloading, or speeding, the frame's impact resistance and rigidity are insufficient, posing significant safety hazards. While some manufacturers have designed double-layer frames, these designs suffer from an imbalance in overall rigidity and impact resistance due to improper matching of material properties and a lack of effective reinforcement at key connections. This still fails to meet the demands of complex operating conditions, and frame breakage and deformation accidents still occur frequently. Furthermore, existing frame structures do not fully consider the installation requirements of solar photovoltaic modules, lacking dedicated and stable photovoltaic support designs, making it difficult to adapt to the functional characteristics of solar-powered electric vehicles. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by developing a double-layer frame structure for solar-powered electric vehicles. The invention employs a double-layer load-bearing structure, combined with a multi-directional reinforcement structure, to improve the strength, rigidity, and impact resistance of the frame. It also integrates a dedicated photovoltaic module mounting structure and multiple component mounting stations to meet the functional requirements of solar-powered electric vehicles.

[0005] The technical solution to the technical problem solved by this utility model is as follows: This application provides a double-layer frame structure for a solar-powered electric vehicle, including a head tube, a main frame tube, and a frame body; the frame body includes an upper rectangular tube, a lower circular tube, side tubes, and a photovoltaic support tube; The top of the main frame tube is connected to the bottom of the head tube, and the bottom is connected to the middle of the front end of the upper rectangular tube and extends downward to connect with the lower round tube. The connection between the main frame tube and the upper rectangular tube is reinforced by a reinforcing rib. The upper rectangular tube and the lower circular tube are arranged in parallel. The rear end of the lower circular tube is connected to the side tube and the photovoltaic support tube respectively. The side tube is located above the photovoltaic support tube. The rear end of the upper rectangular tube is connected to the side tube. The rear part of the photovoltaic support tube is bent upward and connected to the rear end of the side tube. The upper rectangular tube includes a left upper rectangular tube and a right upper rectangular tube arranged symmetrically, and the front parts of the left upper rectangular tube and the right upper rectangular tube are connected by a reinforcing crossbeam. The upper rectangular tube and the lower circular tube are reinforced and connected by evenly distributed medium-strength groove plates; The connection points of the side tubes with the upper left rectangular tubes and the upper right rectangular tubes are reinforced by side tube reinforcement brackets parallel to the reinforcing beams.

[0006] As an improvement to the above solution, the left and right sides of the connection end between the head tube and the main frame tube are reinforced by the main frame tube reinforcing plate; the rear side of the head tube is reinforced by the head tube reinforcing groove plate to the rear side of the main frame tube.

[0007] As an improvement to the above solution, a hook connecting plate is connected to the rear side of the head tube, an electrical connecting seat is connected to the middle of the front side, a horizontally arranged front photovoltaic fixing plate is connected to the bottom of the front side, and a steering limiting plate is connected to the bottom of the front side.

[0008] As an improvement to the above solution, the lower circular tube includes a symmetrically arranged lower left circular tube and a lower right circular tube. The inner sides of the lower left circular tube and the lower right circular tube are connected to the battery compartment via a battery compartment connecting plate, and the front end is connected to a battery compartment protection plate.

[0009] As an improvement to the above solution, the side tube includes an inclined first side tube and a horizontal second side tube; a rear flat fork tube is connected to the lower part of the first side tube, and the rear flat fork tube and the first side tube are reinforced and connected by a rear flat fork reinforcing tube; a rear flat fork connecting seat is connected to the bottom end of the rear flat fork tube.

[0010] As an improvement to the above solution, a horizontally placed seat bucket support square tube is connected to the connection between the rear horizontal fork reinforcing tube and the rear horizontal fork tube on both the left and right sides, and a seat bucket support rear bracket is connected to the rear side of the seat bucket support square tube; a seat bucket rear support beam is connected to the top of the second side tube.

[0011] As an improvement to the above solution, the two second side tubes on the left and right are reinforced and connected by an upper reinforcing support square tube, and an electrical box is connected thereto; a rear support bracket is connected above the rear end of the second side tube, and an upper shock absorber is connected below it.

[0012] As an improvement to the above solution, the photovoltaic support tube includes a first photovoltaic support tube and a second photovoltaic support tube; the first photovoltaic support tube is horizontally connected to the rear end of the lower circular tube, one end of the second photovoltaic support tube is connected to the rear end of the first photovoltaic support tube, and the other end is bent upward and connected to the rear end of the second side tube to form a mounting bracket for the rear photovoltaic panel.

[0013] As an improvement to the above solution, a mudplate connector is connected to the second photovoltaic support tube.

[0014] As an improvement to the above scheme, outer cover support seats are evenly distributed on the outer side of the lower circular tube and the first photovoltaic support tube.

[0015] As an improvement to the above solution, the main frame tube, the upper rectangular tube, and the lower round tube all adopt an open-hole insertion welding structure, and all welding parts adopt a full welding process.

[0016] Compared with existing technologies, the above solution has the following advantages or beneficial effects: This utility model employs a double-layer load-bearing structure with an upper rectangular tube and a lower round tube arranged in parallel. The upper layer uses rectangular tubes, which have strong torsional and bending resistance, a flat stress surface, and facilitate the welding of auxiliary parts and the installation of components, resulting in more uniform force transmission. The lower layer uses round tubes, which have excellent impact resistance and toughness, can disperse instantaneous impact forces, and are easy to process, cost-effective, and have a long fatigue life. The scientific combination of the two achieves a synergistic advantage of rigidity and toughness, convenient assembly, and economical processing. At the same time, with the reasonable connection of various components, the overall strength and rigidity of the frame are greatly improved. The impact resistance and deformation resistance are significantly better than traditional single-layer frames and ordinary double-layer frames, which can effectively cope with complex road conditions, overload and overspeed conditions, and completely solve the industry pain point of frame breakage and deformation.

[0017] The main frame tube, head tube, and upper rectangular tube are reinforced in multiple directions through reinforcing ribs, main frame tube reinforcing plates, and head tube reinforcing grooves. The upper rectangular tube and lower round tube are connected by a middle reinforcing groove. The side tubes and rear swingarm tubes are connected by a rear swingarm reinforcing tube to form a triangular stable structure. The reinforcement design at each key connection point further enhances the load-bearing stability, ensures uniform force transmission, and avoids damage caused by concentrated force.

[0018] The frame integrates a dedicated mounting structure such as a front photovoltaic mounting plate and photovoltaic bracket tube, providing a stable and reliable mounting benchmark for solar photovoltaic modules. It meets the functional requirements of solar electric vehicles, eliminating the need for additional brackets and simplifying the assembly process.

[0019] The frame integrates the mounting structure of functional components such as battery compartment, electrical box, shock absorber mounting base, and mudguard connector, achieving a reasonable layout of multiple components, improving space utilization, and providing effective protection for each component, further enhancing the overall reliability of the vehicle. Attached Figure Description

[0020] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0021] Figure 1 This is a schematic diagram of the double-layer frame structure for a solar-powered electric vehicle in this embodiment. Figure 1 .

[0022] Figure 2 This is a schematic diagram of the double-layer frame structure for a solar-powered electric vehicle in this embodiment. Figure 2 .

[0023] Figure 3 This is a partial enlargement of the double-layer frame structure for a solar-powered electric vehicle in this embodiment. Figure 1 .

[0024] Figure 4 This is a partial enlargement of the double-layer frame structure for a solar-powered electric vehicle in this embodiment. Figure 2 .

[0025] Figure 5 This is a front view of the double-layer frame structure for a solar-powered electric vehicle according to this embodiment.

[0026] In the diagram, 1. Head tube; 2. Hook connecting plate; 3. Electrical connection seat; 4. Head tube reinforcing groove plate; 5. Front photovoltaic mounting plate; 6. Steering limiting plate; 7. Main frame tube; 8. Main frame tube reinforcing plate; 9. Reinforcing rib plate; 10. Upper right rectangular tube; 12. Upper left rectangular tube; 11. Reinforcing crossbeam; 13. Middle reinforcing groove plate; 14. Lower round tube; 15. Battery compartment; 16. Battery compartment protection plate; 17. Battery compartment connecting plate; 18. Side tube; 19. Side tube reinforcing bracket; 20. Rear swingarm tube; 21. Rear swingarm reinforcing tube; 22. Rear swingarm connecting seat; 23. Seat bucket support square tube; 24. Seat bucket support rear bracket; 25. Photovoltaic bracket tube; 26. Outer cover support seat; 27. Upper reinforcing support square tube; 28. Seat bucket rear support beam; 29. ​​Electrical box; 30. Rear bracket support seat; 31. Upper shock absorber seat; 32. Mudslide connecting seat. Detailed Implementation

[0027] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. The present invention omits descriptions of well-known components and processing techniques and processes to avoid unnecessarily limiting the present invention. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] See Figure 1-5 This utility model discloses a double-layer frame structure for a solar-powered electric vehicle, comprising a head tube 1, a main frame tube 7, and a frame body. The frame body is the core load-bearing structure, including an upper rectangular tube and a lower circular tube 14 located at the front, side tubes 18 located at the rear, and photovoltaic support tubes 25 located on both sides of the rear. All components are fixedly connected by welding to ensure connection strength. The frame body adopts a symmetrical design, with the upper rectangular tube being a rectangular cross-section steel pipe and the lower circular tube 14 being a circular cross-section steel pipe. The upper rectangular tube and the lower circular tube 14 are arranged parallel to each other, forming a double-layer load-bearing structure.

[0029] The top of the main frame tube 7 is connected to the bottom of the head tube 1, and the bottom is connected to the middle of the front end of the upper rectangular tube and extends downward to connect with the lower round tube 14. The connection between the main frame tube 7 and the upper rectangular tube is reinforced by welding with reinforcing ribs 9, forming a force transmission path from the head to the upper load-bearing structure. To improve the deformation resistance and stability of the connection between the head tube 1 and the top of the main frame tube 7, main frame tube reinforcing plates 8 are welded to the left and right sides of the connection end for reinforcement. At the same time, the head tube reinforcing groove plate 4 is welded to the rear side of the main frame tube 7 in the middle of the rear side of the head tube 1, forming a multi-directional reinforcement structure.

[0030] A hook connecting plate 2 is welded to the rear side of the head tube 1. The hook connecting plate 2 is located above the head tube reinforcing groove plate 4 and is used to install and fix external hangers. An electrical connection seat 3 is welded to the middle of the front side of the head tube 1 for wiring and fixing electrical components. A horizontally arranged front photovoltaic fixing plate 5 is welded to the bottom of the front side of the head tube 1 to provide an installation reference for the front photovoltaic panel. A steering limiting plate 6 is also welded to the bottom of the front side of the head tube 1 to limit the steering angle and prevent oversteering from causing malfunctions.

[0031] The upper rectangular tubes are arranged symmetrically, consisting of an upper left rectangular tube 12 and an upper right rectangular tube 10. The front sections of the upper left and upper right rectangular tubes 12 and 10 are reinforced by welded reinforcing beams 11 arranged laterally, forming a stable frame at the front of the upper layer and improving the overall rigidity of the upper rectangular tubes. The rear ends of the upper rectangular tubes are welded to the corresponding side tubes 18. To enhance the load-bearing capacity at this connection, left-right side tube reinforcing supports 19 are welded at the connection point to prevent breakage under stress. Simultaneously, the upper rectangular tubes and the lower circular tubes 14 are fixed together by welded and evenly distributed central reinforcing groove plates 13, forming a unified load-bearing structure and further improving the frame's impact resistance.

[0032] The lower circular tube 14 is also arranged symmetrically, divided into a lower left circular tube and a lower right circular tube. The rear end of the lower circular tube 14 extends in two directions: one extends obliquely upward and is welded to the side tube 18, and the other extends horizontally and is welded to the photovoltaic support tube 25. The battery compartment 15 is welded and fixed inside the lower circular tube 14 through the battery compartment connecting plate 17, which is used to place the battery module; the front end of the lower circular tube 14 is welded to the battery compartment protection plate 16, which forms front protection for the battery compartment 15 and prevents foreign objects from impacting and damaging the battery during driving.

[0033] The side tube 18 includes an inclined first side tube and a horizontal second side tube. The front end of the first side tube is welded to the rear end of the lower circular tube 14, and the rear end of the first side tube is welded and fixed to the second side tube, forming a support structure that adapts to the rear profile of the vehicle body. A rear swingarm tube 20 is welded below the first side tube. The rear swingarm tube 20 and the first side tube are reinforced by a rear swingarm reinforcing tube 21. One end of the rear swingarm reinforcing tube 21 is welded to the bottom of the rear swingarm tube 20, and the other end is welded to the first side tube, forming a triangular stable structure and improving the load-bearing capacity of the rear swingarm.

[0034] The bottom end of the rear swingarm tube 20 is welded with a rear swingarm connecting seat 22 for connecting with the rear wheel assembly; the connection points of the left and right rear swingarm reinforcing tubes 21 and the rear swingarm tube 20 are welded together with seat bucket support square tubes 23, the rear side of the seat bucket support square tube 23 is welded with a seat bucket support rear bracket 24, and the upper part of the second side tube is connected with a seat bucket rear support beam 28, which together provide stable support for the seat bucket.

[0035] The two second side tubes on the left and right are reinforced by welding with upper reinforcing support square tube 27 to improve the overall torsional resistance of the side tubes; at the same time, an electrical box 29 is installed between the two second side tubes on the left and right to centrally place electrical components; a rear support bracket 30 is welded to the upper rear end of the second side tube for installing the tail bracket; an upper shock absorber 31 is welded to the lower end of the second side tube for installing shock absorber components.

[0036] The photovoltaic support tube 25 includes a first photovoltaic support tube and a second photovoltaic support tube. The first photovoltaic support tube is horizontally welded to the rear end of the lower circular tube 14. One end of the second photovoltaic support tube is welded to the rear end of the first photovoltaic support tube, and the other end is bent upward and welded to the rear end of the second side tube for fixation, forming a mounting bracket for the rear photovoltaic panel. A mudguard connector 32 is welded onto the second photovoltaic support tube for installing mudguard components. An outer cover support 26 is uniformly welded to the outer side of the lower circular tube 14 and the first photovoltaic support tube for fixing the vehicle body cover.

[0037] The main frame tube 7, the upper rectangular tube, and the lower round tube 14 all employ an open-hole insertion welding structure. Specifically, the corresponding ends of the main frame tube 7 have matching holes, and the ends of the upper rectangular tube and lower round tube 14 are inserted into these holes before welding. This ensures a more reliable connection and effectively prevents breakage due to stress concentration at the joint. All welded parts utilize a full-weld process to guarantee weld strength, giving the frame excellent rigidity and impact resistance, meeting the requirements of solar-powered electric vehicles operating on complex road surfaces and under overload and speeding conditions. While the specific embodiments of the utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of this utility model. Various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of this utility model are still within the scope of protection of this utility model.

Claims

1. A double-layer frame structure for a solar-powered electric vehicle, characterized in that, It includes a head tube (1), a frame main tube (7) and a frame body; the frame body includes an upper rectangular tube, a lower round tube (14), a side tube (18) and a photovoltaic support tube (25). The top of the main frame tube (7) is connected to the bottom of the head tube (1), the bottom of the main frame tube (7) is connected to the middle of the front end of the upper rectangular tube and extends downward to connect with the lower round tube (14), and the connection between the main frame tube (7) and the upper rectangular tube is reinforced by a reinforcing rib (9). The upper rectangular tube and the lower circular tube (14) are distributed in parallel. The rear end of the lower circular tube (14) is connected to the side tube (18) and the photovoltaic support tube (25) respectively. The side tube (18) is located above the photovoltaic support tube (25). The rear end of the upper rectangular tube is connected to the side tube (18). The rear part of the photovoltaic support tube (25) is bent upward and connected to the rear end of the side tube (18). The upper rectangular tube includes a left upper rectangular tube (12) and a right upper rectangular tube (10) arranged symmetrically. The front parts of the left upper rectangular tube (12) and the right upper rectangular tube (10) are reinforced and connected by a reinforcing crossbeam (11). The upper rectangular tube and the lower circular tube (14) are reinforced and connected by uniformly distributed medium reinforcing groove plates (13); The connection points of the side tube (18) with the upper left rectangular tube (12) and the upper right rectangular tube (10) are reinforced by the side tube reinforcement bracket (19) parallel to the reinforcement beam (11).

2. The double-layer frame structure for a solar-powered electric vehicle according to claim 1, characterized in that, The left and right sides of the connection end between the head tube (1) and the frame main tube (7) are reinforced by the frame main tube reinforcing plate (8); the rear side of the head tube (1) is reinforced by the head tube reinforcing groove plate (4) and the rear side of the frame main tube (7).

3. The double-layer frame structure for a solar-powered electric vehicle according to claim 1, characterized in that, The head tube (1) is connected to a hook connecting plate (2) at the rear, an electrical connecting seat (3) at the middle of the front, a horizontally arranged front photovoltaic fixing plate (5) at the bottom of the front, and a steering limiting plate (6) at the bottom of the front.

4. The double-layer frame structure for a solar-powered electric vehicle according to claim 1, characterized in that, The lower circular tube (14) includes a left lower circular tube and a right lower circular tube arranged symmetrically. The inner sides of the left lower circular tube and the right lower circular tube are connected to the battery compartment (15) through the battery compartment connecting plate (17), and the front end is connected to the battery compartment protection plate (16).

5. The double-layer frame structure for a solar-powered electric vehicle according to claim 1, characterized in that, The side tube (18) includes an inclined first side tube and a horizontal second side tube; a rear flat fork tube (20) is connected to the bottom of the first side tube, and the rear flat fork tube (20) and the first side tube are reinforced and connected by a rear flat fork reinforcing tube (21); a rear flat fork connecting seat (22) is connected to the bottom end of the rear flat fork tube (20).

6. The double-layer frame structure for a solar-powered electric vehicle according to claim 5, characterized in that, A horizontally placed seat bucket support square tube (23) is connected to the connection between the rear horizontal fork reinforcing tube (21) and the rear horizontal fork tube (20) on both sides. A seat bucket support rear bracket (24) is connected to the rear side of the seat bucket support square tube (23); a seat bucket rear support beam (28) is connected to the top of the second side tube.

7. The double-layer frame structure for a solar-powered electric vehicle according to claim 5, characterized in that, The two second side tubes on the left and right are reinforced and connected by an upper reinforcing support square tube (27), and an electrical box (29) is connected to them; a rear support bracket (30) is connected above the rear end of the second side tube, and an upper shock absorber (31) is connected below it.

8. The double-layer frame structure for a solar-powered electric vehicle according to claim 5, characterized in that, The photovoltaic support tube (25) includes a first photovoltaic support tube and a second photovoltaic support tube; the first photovoltaic support tube is horizontally connected to the rear end of the lower circular tube (14), one end of the second photovoltaic support tube is connected to the rear end of the first photovoltaic support tube, and the other end is bent upward and connected to the rear end of the second side tube to form a mounting bracket for the rear photovoltaic panel.

9. The double-layer frame structure for a solar-powered electric vehicle according to claim 8, characterized in that, The second photovoltaic support tube is connected to a mud plate connector (32).

10. The double-layer frame structure for a solar-powered electric vehicle according to claim 8, characterized in that, The lower circular tube (14) and the outer side of the first photovoltaic support tube are evenly distributed with outer cover support seats (26).

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