Stainless steel tube frame for electric tricycle

Abstract

The utility model relates to the technical field of electro-tricycles, in particular to a stainless steel tube frame for an electro-tricycle, which comprises an upper frame, a lower frame, a head, a lower left side beam and a lower right side beam which are integrally formed, a U-shaped head tube is formed at the front end of the lower left side beam and the front end of the lower right side beam, and a head beam is fixedly connected between the U-shaped head tube and an upper front beam. The head beam and the U-shaped head pipe form a headstock; the lower left side beam and the lower right side beam of the lower frame are integrally formed and extend to form the U-shaped head tube, then the U-shaped head tube is fixedly connected with the upper front cross beam of the upper frame through the head beam, a composite supporting structure of a vehicle head is formed, side body and human body loads are dispersed to all parts from a traditional single welding point, local stress concentration is reduced, and the stability of the vehicle head is improved. The problem of damage caused by breakage of a traditional structural cross beam is avoided; the geometric connection of the head beam and the U-shaped head tube can improve the overall bending resistance and torsional rigidity of the tricycle frame, and the service life of the tricycle can be effectively prolonged.

Description

Technical fields:

[0001] This utility model relates to the field of electric tricycle technology, and in particular to a stainless steel tube frame for electric tricycles. Background technology:

[0002] The tricycle frame is the core structural component of a tricycle, playing a crucial role in supporting the entire vehicle, connecting various systems, and transmitting loads. Currently, most tricycles on the market have their front frame manufactured separately and then welded to both ends of the front crossbeam. As the main load-bearing part of the tricycle, this type of front frame is only welded to the front crossbeam, concentrating the weight of the vehicle and the rider entirely on the weld between the front frame and the front crossbeam. If the front crossbeam breaks, it will damage the entire frame, resulting in poor load-bearing capacity and inconvenience for use. Utility Model Content:

[0003] The purpose of this invention is to provide a stainless steel tube frame for electric tricycles that addresses the shortcomings of existing technologies, has a strong load-bearing capacity, and can effectively extend the service life of the tricycle.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a stainless steel tube frame for an electric tricycle, comprising an upper frame, a lower frame, and a front end. The upper frame includes an upper front crossbeam, an upper left side beam fixedly connected to the left side of the rear end of the upper front crossbeam, an upper right side beam fixedly connected to the right side of the rear end of the upper front crossbeam, and an upper middle crossbeam fixedly connected between the upper left side beam and the upper right side beam. The lower frame includes a lower left side beam and a lower right side beam. Both the lower left side beam and the lower right side beam are located below the lower frame, and their tail ends are respectively fixedly connected to the bottom of the upper middle crossbeam. The lower left side beam and the lower right side beam are integrally formed, and a U-shaped head tube is formed at the front end of the lower left side beam and the lower right side beam. A head beam is fixedly connected between the U-shaped head tube and the upper front crossbeam, and the head beam and the U-shaped head tube form the front end of the tricycle.

[0005] A further improvement to the above solution is that the lower left beam and the lower right beam are integrally formed by bending stainless steel pipes.

[0006] A further improvement to the above solution is that a seat cushion fixing frame is provided on the head beam, and a seat cushion mounting beam is fixedly connected to the seat cushion fixing frame.

[0007] A further improvement to the above scheme is that the upper frame also includes two upper rear crossbeams, the left and right ends of which are fixedly connected to the upper left side beam and the upper right side beam, respectively.

[0008] A further improvement to the above scheme is that an upper rear reinforcing rib is provided between the two upper rear crossbeams.

[0009] A further improvement to the above scheme is that an upper front reinforcing rib is provided between the upper front crossbeam and the upper middle crossbeam.

[0010] A further improvement to the above scheme is that a lower front reinforcing rib is provided between the lower left beam and the lower right beam.

[0011] A further improvement to the above scheme is that the lower frame also includes two lower left longitudinal beams and two lower right longitudinal beams. The tops of the two lower left longitudinal beams are fixedly connected to the bottom of the upper front crossbeam, and the bottom of one of the lower left longitudinal beams is fixedly connected to the lower left side beam. The tops of the two lower right longitudinal beams are fixedly connected to the bottom of the upper front crossbeam, and the bottom of one of the lower right longitudinal beams is fixedly connected to the lower right side beam.

[0012] A further improvement to the above scheme is that a left-side reinforcing rib is provided between one of the lower left longitudinal beams and the upper left-side beam; and a right-side reinforcing rib is provided between one of the lower right longitudinal beams and the upper right-side beam.

[0013] A further improvement to the above scheme is that the lower frame also includes a lower left crossbeam and a lower right crossbeam. The lower left crossbeam is fixedly connected between one of the lower left longitudinal beams and the lower left side beam, and the lower right crossbeam is fixedly connected between one of the lower right longitudinal beams and the lower right side beam.

[0014] The beneficial effects of this utility model are as follows: This utility model includes an upper frame, a lower frame, and a front end. The upper frame includes an upper front crossbeam, an upper left side beam fixedly connected to the left side of the rear end of the upper front crossbeam, an upper right side beam fixedly connected to the right side of the rear end of the upper front crossbeam, and an upper middle crossbeam fixedly connected between the upper left side beam and the upper right side beam. The lower frame includes a lower left side beam and a lower right side beam. The lower left side beam and the lower right side beam are both located below the lower frame, and their tail ends are respectively fixedly connected to the bottom of the upper middle crossbeam. The lower left side beam and the lower right side beam are integrally formed. The front ends of the lower left side beam and the lower right side beam are formed with U-shaped head tubes. A head beam is fixedly connected between the U-shaped head tubes and the upper front crossbeam. The head beam and the U-shaped head tubes form the front end of the vehicle.

[0015] The lower left and lower right beams of the lower frame of this utility model are integrally formed and extend to form a U-shaped head tube. The head beam is then fixedly connected to the upper front crossbeam of the upper frame to form a composite support structure for the front of the vehicle. This disperses the load on the sides and the rider from the traditional single welding point to various parts, reducing local stress concentration and avoiding damage caused by the breakage of the crossbeam in the traditional structure. The layered design of the upper and lower frames forms a three-dimensional truss. The geometric connection between the head beam and the U-shaped head tube can improve the overall bending and torsional stiffness of the frame, especially adapting to the dynamic load impact under bumpy road conditions. The load-bearing capacity is significantly improved compared to the traditional frame structure, which can effectively extend the service life of the tricycle and is better suited for electric tricycles. Attached image description:

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

[0017] Figure 2 This is a schematic diagram of the structure on the other side of this utility model.

[0018] Explanation of reference numerals in the attached diagram: Upper frame 1, Upper front crossbeam 11, Upper left side beam 12, Upper right side beam 13, Upper middle crossbeam 14, Upper rear crossbeam 15, Upper rear reinforcing rib 151; Lower frame 2, Lower left side beam 21, Lower right side beam 22, Lower front reinforcing rib 23, Lower left longitudinal beam 24, Left side reinforcing rib 241; Lower right longitudinal beam 25, Right side reinforcing rib 251, Lower left crossbeam 26, Lower right crossbeam 27, Head unit 3, U-shaped head tube 31, Head beam 32, Seat cushion fixing bracket 321, Seat cushion mounting beam 322, Upper front reinforcing rib 4. Detailed implementation method:

[0019] The present invention will be further described below with reference to the accompanying drawings, such as... Figure 1-2As shown, this utility model provides a stainless steel tube frame for an electric tricycle, including an upper frame 1, a lower frame 2, and a front end 3. The upper frame 1 includes an upper front crossbeam 11, an upper left side beam 12 fixedly connected to the left rear end of the upper front crossbeam 11, an upper right side beam 13 fixedly connected to the right rear end of the upper front crossbeam 11, and an upper middle crossbeam 14 fixedly connected between the upper left side beam 12 and the upper right side beam 13. The lower frame 2 includes a lower left side beam 21 and a lower right side beam 22. Both the lower left side beam 21 and the lower right side beam 22 are located below the lower frame 2, and their tail ends are fixedly connected to the bottom of the upper middle crossbeam 14. The lower left side beam 21 and the lower right side beam 22 are integrally formed, and their front ends are formed with U-shaped head tubes 31. The U-shaped head tubes 31 are connected to the upper front crossbeam 11. The upper frame 2 is fixedly connected to a head beam 32, which, together with a U-shaped head tube 31, forms the front of the vehicle 3. The lower left beam 21 and lower right beam 22 of the lower frame 2 are integrally formed and extend to form a U-shaped head tube 31. The head beam 32 is then fixedly connected to the upper front crossbeam 11 of the upper frame 1, forming a composite support structure for the front of the vehicle 3. This disperses the side and human loads from the traditional single welding point to various parts, reducing local stress concentration and avoiding damage caused by the breakage of the crossbeam in the traditional structure. The upper and lower frames 2 are designed in layers to form a three-dimensional truss. The geometric connection between the head beam 32 and the U-shaped head tube 31 can improve the overall bending and torsional stiffness of the frame, especially adapting to the dynamic load impact under bumpy road conditions. The load-bearing capacity is significantly improved compared to the traditional frame structure, which can effectively extend the service life of the tricycle and is better suited for electric tricycles.

[0020] The lower left beam 21 and lower right beam 22 of this utility model are integrally formed by bending stainless steel tubes, eliminating the need for frequent application of anti-rust paint, reducing maintenance costs, reducing the overall weight of the vehicle, improving load-bearing efficiency, exhibiting excellent fatigue resistance, and significantly extending the service life of the frame.

[0021] The head beam 32 of this utility model is provided with a seat cushion fixing frame 321, and a seat cushion mounting beam 322 is fixedly connected to the seat cushion fixing frame 321. The seat cushion mounting beam 322 is used to install the tricycle seat cushion.

[0022] The upper frame 1 of this utility model also includes two upper rear crossbeams 15. The left and right ends of the two upper rear crossbeams 15 are fixedly connected to the upper left side beam 12 and the upper right side beam 13 respectively. The position of the upper rear crossbeams 15 can be adjusted according to specific needs to adjust the length of the rear of the tricycle.

[0023] The present invention provides an upper rear reinforcing rib 151 between the two upper rear crossbeams 15, an upper front reinforcing rib 4 between the upper front crossbeam 11 and the upper middle crossbeam 14, and a lower front reinforcing rib 5 between the lower left side beam 21 and the lower right side beam 22. The setting of the reinforcing ribs can effectively improve the connection strength of the frame and further improve the overall load-bearing capacity of the frame.

[0024] The lower frame 2 of this utility model also includes two lower left longitudinal beams 24 and two lower right longitudinal beams 25. The tops of the two lower left longitudinal beams 24 are fixedly connected to the bottom of the upper front crossbeam 11, and the bottom of one of the lower left longitudinal beams 24 is fixedly connected to the lower left side beam 21. The tops of the two lower right longitudinal beams 25 are fixedly connected to the bottom of the upper front crossbeam 11, and the bottom of one of the lower right longitudinal beams 25 is fixedly connected to the lower right side beam 22.

[0025] In this invention, a left-side reinforcing rib 241 is provided between one of the lower left longitudinal beams 24 and the upper left-side beam 12; and a right-side reinforcing rib 251 is provided between one of the lower right longitudinal beams 25 and the upper right-side beam 13. This can enhance the connection strength between the upper and lower frames 2, increase rigidity, suppress local buckling in the high-stress area of ​​the frame, prevent the thin-walled frame tubing from denting or twisting under heavy load, thus avoiding deformation and damage to the upper and lower frames 2, and increasing the overall load-bearing capacity of the frame.

[0026] The lower frame 2 of this utility model also includes a lower left crossbeam 26 and a lower right crossbeam 27. The lower left crossbeam 26 is fixedly connected between one of the lower left longitudinal beams 24 and the lower left side beam 21, and the lower right crossbeam 27 is fixedly connected between one of the lower right longitudinal beams 25 and the lower right side beam 22. The lower left crossbeam 26 and the lower right crossbeam 27 can distribute the weight borne by the upper frame 1 to the lower frame 2, avoid stress concentration and damage to the connection, and effectively improve the frame load.

[0027] Of course, the above are only preferred embodiments of this utility model. Therefore, all equivalent changes or modifications made in accordance with the structure, features and principles of this utility model patent application are included in the scope of this utility model patent application.

Claims

1. A stainless steel tube frame for an electric tricycle, comprising an upper frame (1), a lower frame (2), and a front end (3), characterized in that: The upper frame (1) includes an upper front crossbeam (11), an upper left side beam (12) fixedly connected to the left side of the rear end of the upper front crossbeam (11), an upper right side beam (13) fixedly connected to the right side of the rear end of the upper front crossbeam (11), and an upper middle crossbeam (14) fixedly connected between the upper left side beam (12) and the upper right side beam (13). The lower frame (2) includes a lower left side beam (21) and a lower right side beam (22), both of which are located on the lower frame. Below 2), and the tail ends of the lower left beam (21) and the lower right beam (22) are respectively fixedly connected to the bottom of the upper middle crossbeam (14). The lower left beam (21) and the lower right beam (22) are integrally formed. The front ends of the lower left beam (21) and the lower right beam (22) are formed with U-shaped head tubes (31). The U-shaped head tubes (31) and the upper front crossbeam (11) are fixedly connected with a head beam (32). The head beam (32) and the U-shaped head tubes (31) are formed to form the front of the vehicle (3).

2. The stainless steel tube frame for an electric tricycle according to claim 1, characterized in that: The lower left beam (21) and the lower right beam (22) are integrally formed by bending stainless steel pipes.

3. The stainless steel tube frame for an electric tricycle according to claim 1, characterized in that: A seat cushion fixing frame (321) is provided on the head beam (32), and a seat cushion mounting beam (322) is fixedly connected to the seat cushion fixing frame (321).

4. A stainless steel tube frame for an electric tricycle according to claim 1, characterized in that: The upper frame (1) also includes two upper rear crossbeams (15), the left and right ends of which are fixedly connected to the upper left side beam (12) and the upper right side beam (13), respectively.

5. A stainless steel tube frame for an electric tricycle according to claim 4, characterized in that: An upper rear reinforcing rib (151) is provided between the two upper rear crossbeams (15).

6. A stainless steel tube frame for an electric tricycle according to claim 1, characterized in that: An upper front reinforcing rib (4) is provided between the upper front crossbeam (11) and the upper middle crossbeam (14).

7. A stainless steel tube frame for an electric tricycle according to claim 1, characterized in that: A lower front reinforcing rib (5) is provided between the lower left beam (21) and the lower right beam (22).

8. A stainless steel tube frame for an electric tricycle according to claim 1, characterized in that: The lower frame (2) also includes two lower left longitudinal beams (24) and two lower right longitudinal beams (25). The tops of the two lower left longitudinal beams (24) are fixedly connected to the bottom of the upper front crossbeam (11), and the bottom of one of the lower left longitudinal beams (24) is fixedly connected to the lower left side beam (21). The tops of the two lower right longitudinal beams (25) are fixedly connected to the bottom of the upper front crossbeam (11), and the bottom of one of the lower right longitudinal beams (25) is fixedly connected to the lower right side beam (22).

9. A stainless steel tube frame for an electric tricycle according to claim 8, characterized in that: A left-side reinforcing rib (241) is provided between one of the lower left longitudinal beams (24) and the upper left-side beam (12); a right-side reinforcing rib (251) is provided between one of the lower right longitudinal beams (25) and the upper right-side beam (13).

10. A stainless steel tube frame for an electric tricycle according to claim 8, characterized in that: The lower frame (2) also includes a lower left crossbeam (26) and a lower right crossbeam (27). The lower left crossbeam (26) is fixedly connected between one of the lower left longitudinal beams (24) and the lower left side beam (21). The lower right crossbeam (27) is fixedly connected between one of the lower right longitudinal beams (25) and the lower right side beam (22).

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