Single tube integrally formed body support for electric vehicle

Abstract

This invention discloses a single-tube, one-piece molded frame bracket for electric vehicles, comprising a tube body with a support fixed at the lower end. A rod-type shock absorber bracket is fixed within the support. Both ends of the shock absorber bracket are formed with fittings for connecting left and right shock absorbers. These fittings are located on the outer sides of the support, and are symmetrically distributed on both sides of the tube body. This invention solves the problem of asymmetry that easily occurs when welding the connecting ears to install shock absorbers on existing frames. By installing shock absorbers using the shock absorber bracket, and ensuring the position of the fittings at both ends is guaranteed by the machining precision of the rod body in one step, without the need for separate welding or positioning, this invention eliminates the height difference between the left and right mounting points caused by separate welding of traditional connecting ears, ensuring symmetrical installation positions of the shock absorbers on both sides.

Description

Technical Field

[0001] This invention relates to the field of vehicle frame technology, specifically to a single-tube, one-piece molded body bracket for electric vehicles. Background Technology

[0002] Most existing electric vehicle shock absorbers are connected and fixed to the frame via connecting lugs. These lugs are typically welded or fixed to the frame, forks, or other components. Their positioning accuracy depends on the welding fixtures and the operator's skill level. In actual production, it's difficult to ensure that the welding positions of the left and right connecting lugs are perfectly aligned, easily resulting in height differences or front-to-back misalignment. When the position of the connecting lugs is inherently off, the mounting points of the left and right shock absorbers are not on the same symmetrical plane, forcing the shock absorbers to be installed at an angle. Even if the shock absorbers have movable ball joints at both ends that allow for a barely secure installation, their stress state deviates from the design conditions.

[0003] Asymmetrical installation of shock absorbers can lead to the following specific consequences: 1. Tilted installation or uneven force distribution on the left and right sides of the shock absorber can prevent the shock absorber spring and damper from working along the designed axis, resulting in a significant reduction in shock absorption effect; 2. Deviation in the position of the connecting lugs can cause the shock absorber itself to shift or wear unevenly, which directly affects the wheel's centerline, leading to a chain reaction of problems such as uneven tire wear, wear on mudguards, and damage to bearings. Therefore, there is an urgent need for a shock absorber bracket solution that can ensure precise symmetry in the left and right installation positions and uniform force distribution. Summary of the Invention

[0004] The purpose of this invention is to provide a single-tube integrated frame bracket for electric vehicles, which uses a shock absorber bracket to install shock absorbers. The positions of the sleeves at both ends are guaranteed by the machining accuracy of the rod body in one go, eliminating the need for separate welding or positioning. This eliminates the height difference between the left and right mounting points caused by separate welding of traditional connecting ears, and ensures that the installation positions of the shock absorbers on both sides are symmetrical.

[0005] This invention provides the following technical solution: a single-tube integrated frame bracket for an electric vehicle, comprising a tube body, on which, from front to back, are sequentially arranged a hinge mounting plate, a seat support frame, a front connecting seat, a rear seat insertion seat, a rear connecting seat, a support, a rear seat connecting frame, and a taillight socket. The hinge mounting plate, seat support frame, rear seat insertion seat, and rear seat connecting frame are disposed on the surface of the tube body. The front connecting seat, rear connecting seat, support, and taillight socket are connected to the lower surface of the tube body. A support is fixed at the lower end of the tube body. A transversely distributed rod-type shock absorber bracket is fixed inside the support. Both ends of the shock absorber bracket are formed with fittings for connecting left and right shock absorbers. The fittings at both ends are located on the outside of the support, and the fittings on both sides are symmetrically distributed on both sides of the tube body.

[0006] To facilitate the installation of the support and the positioning of the shock absorber, the support includes a base plate and a snap plate. The snap plate is formed on the upper surfaces of both ends of the base plate and is snapped and welded to the tube body. The shock absorber bracket is connected to the snap plate on both sides. The diameter of the sleeve part is smaller than the diameter of the shock absorber bracket.

[0007] For mounting the hinge, the end of the tube is formed with an elbow. The hinge mounting plate is fixed on the top surface of the elbow. A hinge assembly is fixed on the hinge mounting plate. The hinge assembly includes a hinge base, a pin, and a rotating arm. The hinge base is connected to the hinge mounting plate. The rotating arm is rotatably connected to the side of the hinge base via the pin. The two ends of the pin are connected to the two side walls of the hinge base.

[0008] To support the seat, two symmetrically distributed seat support frames are provided below the hinge mounting plate. The seat support frames are fixed to the surface of the elbow, and the upper end of the seat support frame is higher than the height of the rotating arm.

[0009] To improve the strength of the seat support frame, the seat support frame includes a first folded edge, a second folded edge, a third folded edge, and a fourth folded edge. The first folded edge is bent forward at one end of the second folded edge and is perpendicular to the second folded edge. The third folded edge is bent backward at the other end of the second folded edge and is perpendicular to the second folded edge. The fourth folded edge is bent towards the centerline of the tube at the other end of the third folded edge and is perpendicular to the fourth folded edge. The second folded edge is L-shaped.

[0010] According to the above technical solution, the lower end of the rear seat connecting frame is formed with a groove, which is fastened to the tube body, and the upper surface of the rear seat connecting frame is used to connect the seat.

[0011] In order to position the rear seat, a insertion groove is formed on the end face of the rear seat insertion seat. The height of the insertion groove is lower than that of the rear seat insertion seat, and the insertion groove is used to insert the seat.

[0012] The front connecting seat has a groove formed in the middle, and the tube is embedded in the groove. The width of the tube matches the width of the groove. Both ends of the front connecting seat have front connecting holes, which are used to connect the front cover of the electric vehicle.

[0013] The rear connecting seat includes two symmetrical U-shaped plates. One side of the U-shaped plate is welded to the lower surface of the tube body. The sealing end of the U-shaped plate is located away from the tube body. A rear connecting hole is provided on the sealing end of the U-shaped plate. The rear connecting hole is used to connect the rear cover of the electric vehicle.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: (1) Replacing the existing welded frame with a single bent tube greatly reduces the number of welding points in the traditional frame, effectively eliminating stress concentration points, resulting in stronger overall rigidity and fatigue resistance. It also saves a lot of material preparation, cutting, positioning, welding and other processes, resulting in higher production efficiency and product consistency. Furthermore, it integrates hinge mounting plate, seat support frame, front connecting seat, rear seat plug-in seat, rear connecting seat, support, rear seat connecting frame and taillight socket on the tube, integrating multiple functions into one, making the structure more compact and simplifying the vehicle assembly process. (2) By fixing a support at the lower end of the tube and fixing a rod-type shock absorber bracket inside the support, the sleeves at both ends of the shock absorber bracket are integrally formed by the rod itself. This structure ensures that the positional accuracy of the left and right sleeves is guaranteed by the one-time machining accuracy of the rod, without the need for separate welding or positioning. This fundamentally eliminates the height difference or front-back offset of the left and right installation points caused by separate welding of the traditional connecting ears, ensuring that the installation positions of the left and right shock absorbers are precisely symmetrical. This further effectively avoids a series of chain problems such as shock absorber wear, wheel offset from the center line, tire wear and bearing damage, and significantly extends the service life of related components. (3) A single tube integrates a shock absorber bracket, hinge assembly, seat support frame, rear seat connecting frame, front and rear side cover connecting seat and taillight base. This single tube integrated design is not only compact and reduces the number of parts, but also simplifies the assembly process of the body bracket, improves production efficiency, and reduces manufacturing costs. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is a front view of the overall structure of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4 This is an exploded view of the invention from a three-dimensional perspective; In the diagram: 1. Tube body; 2. Support; 3. Shock absorber bracket; 31. Sleeve joint; 4. Seat support frame; 41. First folded edge; 42. Second folded edge; 43. Third folded edge; 44. Fourth folded edge; 5. Hinge mounting plate; 6. Front connecting seat; 61. Front connecting hole; 7. Hinge assembly; 71. Pin; 72. Rotating arm; 73. Hinge base; 8. Rear seat connecting frame; 9. Taillight holder; 20. Rear seat insertion seat; 201. Insertion slot; 30. Rear connecting seat; 301. Rear connecting hole. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1 to 4 This invention provides a technical solution: a single-tube integrated frame for electric vehicles, comprising a tube 1, which is a circular or rectangular steel tube to ensure sufficient structural strength. The tube 1 is provided with, from front to back, a hinge mounting plate 5, a seat support frame 4, a front connecting seat 6, a rear seat insertion seat 20, a rear connecting seat 30, a support 2, a rear seat connecting frame 8, and a taillight socket 9. The hinge mounting plate 5, seat support frame 4, rear seat insertion seat 20, and rear seat connecting frame 8 are disposed on the surface of the tube 1. The front connecting seat 6, rear connecting seat 30, support 2, and taillight socket 9 are connected to the lower surface of the tube. This replaces the welded frame with a single bent tube 1 and integrates multiple functional components, significantly reducing the numerous welding points in traditional frames, effectively eliminating stress concentration points, resulting in stronger overall rigidity and fatigue resistance. It eliminates many processes such as material preparation, cutting, positioning, and welding, leading to higher production efficiency and product consistency. The integration of multiple functional components makes the structure more compact and simplifies the vehicle assembly process.

[0018] A support 2 is fixed to the lower end of the tube body 1. The support 2 is located near the rear wheel of the electric vehicle. In this embodiment, the support 2 includes a base plate 21 and a buckle plate 22. The buckle plate 22 is formed on the upper surfaces of both ends of the base plate 21. During assembly, the tube body 1 is embedded between the buckle plates, so that the buckle plates are fastened and tightly fitted to the outer wall of the tube body 1. Then, the buckle plates are fixedly connected to the tube body 1 by welding. A rod-type shock absorber bracket 3 is fixed inside the support 2. The shock absorber bracket 3 is a long strip rod with two ends respectively formed for connecting the left and right shock absorbers. The sleeve portion 31 has two ends located on the outer sides of the two buckle plates 22, and is symmetrically distributed on both sides of the tube body 1. The diameter of the sleeve portion 31 is designed to be smaller than the diameter of the main body of the shock absorber bracket 3, thus forming a stepped surface between them, which facilitates the positioning of the mounting ring at the end of the shock absorber after it is fitted. Through holes are opened on the buckle plates on both sides, through which the shock absorber bracket 3 passes and is fixed to the buckle plate 22 by welding. In the installation process of the support 2, firstly, the base plate 21 and buckle plate 22 of the support 2 are fitted onto the predetermined position of the tube body 1 and welded. Then, the shock absorber bracket 3 is passed through the buckle plate 22, its position is adjusted, and after ensuring that the sleeve portions 31 at both ends extend by an equal distance and at the same height, the shock absorber bracket 3 is welded and fixed to the buckle plate 22. Since the sleeve part 31 is machined on a single rod, its symmetry is guaranteed by machining and no manual adjustment is required. This fundamentally eliminates the height difference or front-back offset of the left and right mounting points caused by separate welding of traditional connecting ears, ensuring that the installation positions of the left and right shock absorbers are precisely symmetrical.

[0019] The end of the tube body 1 is formed with an upwardly curved elbow. A hinge mounting plate 5 is fixed on the top surface of the elbow. A hinge assembly 7 is bolted to the hinge mounting plate 5. The hinge assembly 7 includes a hinge base 73, a pin 71, and a rotating arm 72. The hinge base 73 is bolted to the hinge mounting plate 5. The end of the rotating arm 72 is rotatably connected to the side of the hinge base 73 through the pin 71. The two ends of the pin 71 pass through the two side walls of the hinge base, so that the rotating arm 72 can rotate around the pin 71 in a vertical plane, thereby facilitating the opening or closing of the seat.

[0020] Two symmetrically distributed seat support frames 4 are provided below the hinge mounting plate 5. The seat support frames 4 are welded and fixed to the surface of the elbow. The upper end of the seat support frame 4 is higher than the height of the rotating arm 72 to ensure effective support for the bucket chair.

[0021] The seat support frame 4 is formed by bending a single metal sheet, including a first fold 41, a second fold 42, a third fold 43, and a fourth fold 44. The first fold 41 is bent forward at one end of the second fold 42, and the first fold 41 is perpendicular to the second fold 42. The third fold 43 is bent backward at the other end of the second fold 42, and the third fold 43 is perpendicular to the second fold 42. The fourth fold 44 is bent towards the centerline of the tube 1 at the other end of the third fold 43, and the third fold 43 and the fourth fold 44 are perpendicular to each other. The second fold 42 is L-shaped to enhance the support strength. This multi-bending structure ensures the strength of the support frame, enabling the seat support frame to form a stable force path in multiple directions, effectively distributing the seat load and avoiding stress concentration. Furthermore, a metal column is connected to the inner wall of the seat support frame 4, and a through hole is opened on the side of the bend. The metal body is inserted into the through hole for the installation and positioning of the seat support frame 4.

[0022] A taillight holder 9 is fixed on the lower rear surface of the tube body 1. The taillight holder 9 is used to install the taillight.

[0023] A rear seat connecting frame 8 is fixed to the upper surface of the rear end of the tube body 1. The lower end of the rear seat connecting frame 8 is formed with a groove. During installation, the groove is fastened onto the tube body 1, and then the two are fixed by welding. The upper surface of the rear seat connecting frame 8 is flat and is used to connect the seat cushion of the rear seat.

[0024] A rear seat connector 20 is also connected to the middle of the tube body 1. The body of the rear seat connector 20 is a U-shaped profile. The two sides of the rear seat connector 20 are fastened and welded to the upper end of the tube body 1. A connector groove 201 is welded to the rear end face of the rear seat connector 20. The connector groove 201 is also a U-shaped profile. The connector groove 201 extends to the rear side. The height of the connector groove 201 is lower than the height of the rear seat connector 20, so that two connector holes are formed between the connector groove 201 and the rear seat connector 20, which facilitates the insertion of the seat and further positioning of the seat.

[0025] The lower end of the tube body 1 is also fixed with a front connecting seat 6 and a rear connecting seat 30. The middle part of the front connecting seat 6 is formed with a groove that matches the shape of the outer wall of the tube body 1. The tube body 1 is embedded in the groove, and then the two are welded and fixed. Both ends of the front connecting seat 6 are formed with front connecting holes 61, which are used to connect the front cover of the electric vehicle.

[0026] The rear connecting seat 30 is located in front of the taillight seat 9. The rear connecting seat 30 includes two symmetrical U-shaped plates. One side of the U-shaped plate is welded to the lower surface of the tube body 1. The U-shaped plate includes a sealing end and an open end. The sealing end of the U-shaped plate is located on the side away from the tube body 1. A rear connecting hole 301 is provided on the sealing end of the U-shaped plate. The rear connecting hole 301 is used to connect the rear cover of the electric vehicle.

[0027] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A single-tube, one-piece molded frame bracket for an electric vehicle, comprising a tube body, characterized in that: The tube body is provided with a hinge mounting plate, a seat support frame, a front connecting seat, a rear seat plug-in seat, a rear connecting seat, a support, a rear seat connecting frame, and a taillight socket in sequence from front to back. The hinge mounting plate, seat support frame, rear seat plug-in seat, and rear seat connecting frame are set on the surface of the tube body. The front connecting seat, rear connecting seat, support, and taillight socket are connected to the lower surface of the tube body. A support is fixed at the lower end of the tube body. A horizontally distributed rod-type shock absorber bracket is fixed inside the support. The two ends of the shock absorber bracket are formed with sleeves for connecting the left and right shock absorbers. The sleeves at both ends are located on the outside of the support, and the sleeves on both sides are symmetrically distributed on both sides of the tube body.

2. The single-tube integrally molded vehicle frame bracket for electric vehicles according to claim 1, characterized in that: The support includes a base plate and a buckle plate. The buckle plate is formed on the upper surfaces of both ends of the base plate. The buckle plate is snapped together and welded to the pipe body. Shock absorber brackets are connected to the buckle plates on both sides. The diameter of the sleeve part is smaller than the diameter of the shock absorber bracket.

3. The single-tube integrally molded vehicle frame bracket for electric vehicles according to claim 1, characterized in that: The end of the tube is formed with an elbow. The hinge mounting plate is fixed on the top surface of the elbow. A hinge assembly is fixed on the hinge mounting plate. The hinge assembly includes a hinge base, a pin, and a rotating arm. The hinge base is connected to the hinge mounting plate. The rotating arm is rotatably connected to the side of the hinge base through the pin. The two ends of the pin are connected to the two side walls of the hinge base.

4. The single-tube integrally molded vehicle frame bracket for electric vehicles according to claim 1, characterized in that: Two symmetrically distributed seat support frames are provided below the hinge mounting plate. The seat support frames are fixed to the surface of the elbow, and the upper end of the seat support frame is higher than the height of the rotating arm.

5. The single-tube integrally molded vehicle frame bracket for electric vehicles according to claim 4, characterized in that: The seat support frame includes a first folded edge, a second folded edge, a third folded edge, and a fourth folded edge. The first folded edge is bent forward at one end of the second folded edge and is perpendicular to the second folded edge. The third folded edge is bent backward at the other end of the second folded edge and is perpendicular to the second folded edge. The fourth folded edge is bent towards the centerline of the tube at the other end of the third folded edge and is perpendicular to the fourth folded edge. The second folded edge is L-shaped.

6. The single-tube integrally molded vehicle frame bracket for electric vehicles according to claim 1, characterized in that: The lower end of the rear seat connecting frame is formed with a groove, which is fastened to the tube body, and the upper surface of the rear seat connecting frame is used to connect the seat.

7. The single-tube integrally molded vehicle frame bracket for electric vehicles according to claim 1, characterized in that: The end face of the rear seat connector is formed with a connector groove, the height of which is lower than that of the rear seat connector, and the connector groove is used to insert a seat.

8. The single-tube integrally molded vehicle frame bracket for electric vehicles according to claim 1, characterized in that: The front connecting seat has a groove formed in the middle, and the tube is embedded in the groove. The width of the tube matches the width of the groove. Both ends of the front connecting seat have front connecting holes, which are used to connect the front cover of the electric vehicle.

9. The single-tube integrally molded vehicle frame bracket for electric vehicles according to claim 1, characterized in that: The rear connecting seat includes two symmetrical U-shaped plates. One side of the U-shaped plate is welded to the lower surface of the tube body. The sealing end of the U-shaped plate is located away from the tube body. A rear connecting hole is provided on the sealing end of the U-shaped plate. The rear connecting hole is used to connect the rear cover of the electric vehicle.

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