Reinforced motorcycle camber beam frame

Abstract

The invention relates to a reinforced motorcycle camber beam frame, which relates to the technical field of motorcycle frames, and comprises a main beam tube made of an integrated square tube, and a motorcycle head tube is fixed at the front end of the main beam tube; a rear connecting pipe made of a square pipe is fixed at the rear end of the main beam pipe, a tailstock pipe is fixed on the rear connecting pipe, the main beam pipe and the rear connecting pipe are fixedly connected with a bottom mounting seat together, a front connecting pipe is arranged on the main beam pipe in a penetrating manner, and a reinforcing pipe is fixed between the front connecting pipe and the tailstock pipe. The integrated square pipe serves as the main beam pipe, the square pipe bears force jointly through the wall thickness part and the corner part and is not prone to deformation, and the strength is improved compared with a round pipe on the premise that the wall thickness is the same; the front side of the oil tank is supported and protected through the supporting pipe, the supporting pipe also supports the front end of the cushion, a seat cask is not needed, and the problem that a traditional plastic seat cask is prone to deformation is solved; all the components on the supporting pipe facilitate installation of the outer plate, and the oil tank can be fully protected.

Description

Technical Field

[0001] This application relates to the field of motorcycle frame technology, and in particular to a reinforced motorcycle underbone frame. Background Technology

[0002] The motorcycle frame is the core component of a motorcycle, generally made of welded steel. Various parts are installed on the frame to assemble the motorcycle as a whole. As the mounting point for all components and the main body for transmitting forces during riding and various collisions, the motorcycle frame is the core structure that reflects the strength of a motorcycle; therefore, frame strength is crucial to a motorcycle.

[0003] The invention patent application with publication number CN101407235A discloses a motorcycle frame. The suspension frame welded to the rear end of the main beam tube of the frame has two support tubes welded between it and the tail frame. The two support tubes are symmetrically arranged on both sides of the tail frame. The backward-curved part of the upper end of the two support tubes is welded to the bottom surface of the left and right longitudinal beams of the tail frame, respectively, so that the axis of the straight section in the middle of the left and right support tubes forms an angle of 34 to 40° with the axis of the left and right longitudinal beams of the tail frame, respectively. A stiffening plate is welded at this angle to increase strength.

[0004] Regarding the aforementioned technologies, the inventors believe that the main beam tube of the frame is a circular tube. When a circular tube is subjected to force, the stress is concentrated in a small area on the stressed side, which easily causes bending deformation and the strength cannot be guaranteed. Summary of the Invention

[0005] This application provides a reinforced motorcycle underbone frame, which uses an integral square tube as the main beam tube. The square tube bears the force through the joint of the wall thickness and the corners, making it less prone to deformation. Under the premise of the same wall thickness, the strength is improved compared with the round tube.

[0006] This application provides a reinforced motorcycle underbone frame, which adopts the following technical solution: A reinforced motorcycle underbone frame includes a main beam tube made of a one-piece square tube, with a head tube fixed to the front end of the main beam tube; a rear connecting tube made of square tube is fixed to the rear end of the main beam tube, and a tailstock tube is fixed to the rear connecting tube; the main beam tube and the rear connecting tube are jointly fixedly connected to a base mounting seat.

[0007] By adopting the above technical solution, using an integrated square tube as the main beam tube, the square tube shares the load through its wall thickness and corners, making it less prone to deformation and increasing its strength compared to a round tube with the same wall thickness. The bottom mounting base is simultaneously fixed to the main beam tube and the rear connecting tube to provide a reinforced fixation effect.

[0008] Optionally, a front connecting pipe is provided through the main beam tube, and a reinforcing pipe is fixed between the front connecting pipe and the tailstock tube. The two ends of the reinforcing pipe are respectively welded to the front connecting pipe and the tailstock tube on opposite sides. Two reinforcing pipes are symmetrically arranged on the left and right sides of the main beam tube.

[0009] By adopting the above technical solution, the front connecting pipe is used as the medium for fixing the front end of the reinforcing pipe to the main beam pipe. By setting the welding position at the front end of the reinforcing pipe, when the reinforcing pipe is subjected to tension or compression in the length direction, the weld at the front end of the reinforcing pipe is not easily subjected to shear force, the stress position is more reasonable, and weld cracking is avoided.

[0010] Optionally, the rear end of the reinforcing tube is bent and attached to the outer wall of the tailstock tube through the tube wall. The rear end of the reinforcing tube is concave and deformed into an arc portion, and the arc surface of the outer wall of the arc portion corresponds to and fits the surface shape of the tailstock tube.

[0011] By adopting the above technical solution, the arc section significantly increases the contact area between the reinforcing tube and the tailstock tube, which disperses pressure when subjected to force and also increases the length of the weld, providing higher strength.

[0012] Optionally, a support tube is fixed on the reinforcing tube, and a middle mounting seat is fixed between the tops of the two support tubes. The middle mounting seat is fixed with a seat cushion pivot. A baffle is fixed between the two support tubes, and an oil tank mounting position is formed between the two reinforcing tubes on the side of the support tube facing the tailstock tube.

[0013] By adopting the above technical solution, the seat cushion is installed at both the fuel tank mounting position and the tailstock tube, and a baffle protects the front of the fuel tank. The frame directly supports the front of the seat cushion through metal support tubes and a center mount, which has higher strength and is less prone to deformation compared to plastic seat buckets.

[0014] Optionally, a positioning rod is fixed to the top end of the support tube, with the positioning rod facing upwards.

[0015] By adopting the above technical solution, the positioning rod is inserted into the seat cushion to provide positioning and anti-slip effects.

[0016] Optionally, an inclined reinforcing plate is fixed between the support tube and the reinforcing tube, and the reinforcing plate is provided with a circular hole and an oblong hole.

[0017] By adopting the above technical solution, the two types of holes on the reinforcing plate provide flexible installation positions for the outer plate, and the outer plate covers and protects the left and right sides of the fuel tank.

[0018] Optionally, the support tube is fixed with a rear mounting plate, the rear mounting plate is provided with holes, and the outer ends of the two rear mounting plates are far apart from each other and extend inclinedly to the rear side of the support tube.

[0019] By adopting the above technical solution, the holes on the rear mounting plate provide the mounting position for the outer plate and also provide anti-concavity support for the outer plate; the inclined structure of the two rear mounting plates can effectively avoid the fuel tank and also protect the front sides of the fuel tank.

[0020] Optionally, the support tube is fixed with a front mounting plate, the front mounting plate is provided with holes, and the outer ends of the two front mounting plates extend towards the front side of the support tube.

[0021] By adopting the above technical solution, the holes on the front mounting plate provide the mounting position for the outer panel and also provide anti-inward support for the outer panel.

[0022] Optionally, a plurality of connecting plates are fixed between the two tailstock tubes, and the connecting plates are provided with a plurality of holes; a U-shaped plate is fixed on the tailstock tube, the opening of the U-shaped plate is set downward, the tailstock tube is located inside the opening of the U-shaped plate, and a plurality of mounting holes are provided on the two side walls and the top surface of the U-shaped plate, and the top surface of the U-shaped plate is higher than the top surface of the connecting plate.

[0023] By adopting the above technical solution, the connecting plate strengthens the fixation between the two tailstock tubes, and the holes on the connecting plate are used to install the seat or tail box. Multiple mounting holes are provided on the side walls and top surface of the U-shaped plate, allowing accessories to be installed in three directions, improving compatibility with accessories and reducing later modification costs. The top surface of the U-shaped plate is higher than the top surface of the connecting plate; the higher U-shaped plate provides a positioning effect for the structure above, preventing slippage.

[0024] Optionally, the main beam tube has a cross-sectional length of 6 cm, a cross-sectional width of 4 cm, and a wall thickness of 2.5 cm.

[0025] By adopting the above technical solution, the main beam tube is a square tube, so the cross-section is rectangular. By setting the cross-sectional dimensions and wall thickness, a good balance is achieved in terms of weight and strength. The 2.5 cm wall thickness of the main beam tube is also more stable when welded with other steel materials, avoiding weld burn-through.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Using an integrated square tube as the main beam tube, the square tube bears the force through the wall thickness and the corners, making it less prone to deformation. Under the premise of the same wall thickness, the strength is improved compared with the round tube. 2. The front of the fuel tank is supported and protected by the support tube, which also supports the front of the seat cushion, eliminating the need for a seat bucket and avoiding the problem of easy deformation of traditional plastic seat buckets. 3. The various components on the support pipe facilitate the installation of the outer plate and also provide adequate protection for the oil tank. Attached Figure Description

[0027] Figure 1 This is a perspective view of a reinforced motorcycle underbone frame according to an embodiment; Figure 2 This is a front view of an embodiment; Figure 3 This is a partial perspective view of an embodiment.

[0028] Explanation of reference numerals in the attached drawings: 1. Main beam tube; 11. Head tube; 12. Rear connecting tube; 2. Tail seat tube; 13. Bottom mounting seat; 14. Front connecting tube; 3. Reinforcing tube; 31. Arc section; 4. Support tube; 41. Middle mounting seat; 42. Seat cushion pivot; 43. Baffle; 5. Fuel tank mounting position; 44. Positioning rod; 45. Reinforcing plate; 46. Rear mounting plate; 47. Front mounting plate; 21. Connecting plate; 22. U-shaped plate. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] Reference Figure 1 and Figure 2 This embodiment discloses a reinforced motorcycle underbone frame, including a main beam tube 1 made of a one-piece square tube, i.e., a seamless square tube. The main beam tube 1 is bent downward in the middle to better fit the shape curve of the motorcycle. The main beam tube 1 is a square tube, so the cross-section is rectangular. The cross-sectional length of the main beam tube 1 is 6cm, the cross-sectional width is 4cm, and the wall thickness is 2.5cm. Through the setting of this cross-sectional size and wall thickness, a good balance is achieved in terms of weight and strength. The 2.5cm wall thickness of the main beam tube 1 is also more stable when welded with other steel materials, avoiding weld burn-through.

[0031] The front end of the main beam tube 1 is fixed with a head tube 11; the rear end of the main beam tube 1 is fixed with a rear connecting tube 12 made of square tubing, and a tailstock tube 2 is fixed to the rear connecting tube 12. The main beam tube 1 and the rear connecting tube 12 are jointly and fixedly connected to a bottom mounting base 13. The bottom mounting base 13 is fixed to both the main beam tube 1 and the rear connecting tube 12 to provide a reinforced fixation effect. The bottom mounting base 13 is used to mount components such as the engine and kickstands. The entire frame is made of metal, and all structures are fixed by welding.

[0032] Reference Figure 1 and Figure 3A front connecting pipe 14 runs through the main beam pipe 1. A reinforcing pipe 3 is fixed between the front connecting pipe 14 and the tailstock pipe 2. The two ends of the reinforcing pipe 3 are welded to the opposite sides of the front connecting pipe 14 and the tailstock pipe 2, respectively. Two reinforcing pipes 3 are symmetrically arranged on the left and right sides of the main beam pipe 1. The reinforcing pipe 3 provides support and reinforcement between the main beam pipe 1 and the tailstock pipe 2, forming a stable triangular structure. By setting the welding position at the front end of the reinforcing pipe 3, when the reinforcing pipe 3 is subjected to tension or compression in the length direction, the weld at the front end of the reinforcing pipe 3 is not easily subjected to shear force, the stress position is more reasonable, and weld cracking is avoided.

[0033] In this design, the rear end of the reinforcing tube 3 is bent and fits against the outer wall of the tailstock tube 2. The rear end wall of the reinforcing tube 3 is concave and deformed inward to form an arc portion 31. The arc surface of the outer wall of the arc portion 31 corresponds to and fits against the surface shape of the tailstock tube 2. This design significantly increases the contact area between the reinforcing tube 3 and the tailstock tube 2, dispersing pressure under stress, preventing deformation, and also increasing the length of the weld, providing higher strength.

[0034] Reference Figure 2 and Figure 3 A support tube 4 is fixed to the reinforcing tube 3. A center mounting base 41 is fixed between the tops of the two support tubes 4, and a seat pivot 42 is fixed to the center mounting base 41. A baffle 43 is fixed between the two support tubes 4. A fuel tank mounting position 5 is formed between the two reinforcing tubes 3 on the side of the support tube 4 facing the tailstock tube 2. The seat is mounted on both the fuel tank mounting position 5 and the tailstock tube 2. The baffle 43 provides protection for the front end of the fuel tank. Compared with the traditional bucket seat method used in motorcycles, this frame directly supports the front end of the seat through the metal support tubes 4 and the center mounting base 41. Compared with the plastic bucket seat, it has higher strength and is not easily deformed. The front end of the seat is simply connected to the seat pivot 42. The fuel tank also supports the seat. It should be noted that a thin seat base is first installed on the top of the center mounting base 41 and the fuel tank, and then the seat body is installed.

[0035] A positioning rod 44 is fixed to the top of the support tube 4, with the positioning rod 44 facing upwards. The positioning rod 44 is used to insert into the seat cushion to provide positioning and anti-slip effect.

[0036] An inclined reinforcing plate 45 is fixed between the support tube 4 and the reinforcing tube 3. The reinforcing plate 45 has circular holes and oblong holes. The two types of holes on the reinforcing plate 45 provide flexible installation positions for the outer plate, which covers and protects the left and right sides of the fuel tank. The three groups of reinforcing plate 45, support tube 4, and reinforcing tube 3 form a stable triangular structure, which improves strength. The reinforcing plate 45 also provides reinforcement and protection for the front sides of the fuel tank.

[0037] A rear mounting plate 46 is fixed to the support tube 4. The rear mounting plate 46 has holes, and the outer ends of the two rear mounting plates 46 are far apart from each other and extend inclined towards the rear side of the support tube 4. A front mounting plate 47 is fixed to the support tube 4. The front mounting plate 47 has holes, and the outer ends of the two front mounting plates 47 extend towards the front side of the support tube 4. The holes on the front mounting plate 47 and the rear mounting plate 46 provide mounting positions for the outer plate and also provide anti-concavity support for the outer plate. In addition, the inclined structure of the two rear mounting plates 46 can effectively avoid the fuel tank and also protect the front sides of the fuel tank.

[0038] Reference Figure 1 Several connecting plates 21 are fixed between the two tailstock tubes 2, and the connecting plates 21 have multiple holes. The connecting plates 21 serve to strengthen the fixation between the two tailstock tubes 2, and the holes on the connecting plates 21 are used to install the seat or tail box.

[0039] A U-shaped plate 22 is fixed to the tailstock tube 2, with the opening of the U-shaped plate 22 facing downwards. The tailstock tube 2 is located inside the opening of the U-shaped plate 22. This arrangement prevents the U-shaped plate 22 from concave deformation and improves its strength. Multiple mounting holes are provided on the side walls and top surface of the U-shaped plate 22, allowing accessories to be installed in three directions, improving compatibility with accessories and reducing subsequent modification costs. The top surface of the U-shaped plate 22 is higher than the top surface of the connecting plate 21; the higher U-shaped plate 22 provides a positioning effect for the structure above, preventing slippage.

[0040] The implementation principle of a reinforced motorcycle underbone frame according to an embodiment of this application is as follows: During assembly, the main beam tube 1 and the rear connecting tube 12 are first fixed by welding, and then the bottom mounting seat 13 is welded. Part of the structure of the bottom mounting seat 13 covers the weld seam of the main beam tube 1 and the rear connecting tube 12, and welding is then performed to achieve a better fixing effect. The bottom mounting seat 13 also plays a role in strengthening the fixing between the main beam tube 1 and the rear connecting tube 12.

[0041] This motorcycle frame uses a one-piece square tube as the main beam tube 1. The square tube shares the load through its thicker wall sections and corners, making it less prone to deformation and increasing strength compared to round tubes with the same wall thickness. Support tube 4 provides support and protection for the front of the fuel tank and also supports the front of the seat, eliminating the need for a seat cover and avoiding the deformation problems of traditional plastic seat covers. The various components on support tube 4 facilitate the installation of outer panels and also provide ample protection for the fuel tank.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reinforced motorcycle underbone frame, characterized in that: It includes a main beam tube (1) made of an integral square tube, with a front end tube (11) fixed to the front end of the main beam tube (1); a rear connecting tube (12) made of square tube is fixed to the rear end of the main beam tube (1), and a tail seat tube (2) is fixed on the rear connecting tube (12); the main beam tube (1) and the rear connecting tube (12) are jointly fixedly connected to a bottom mounting base (13).

2. The reinforced motorcycle underbone frame according to claim 1, characterized in that: The main beam tube (1) is provided with a front connecting tube (14) through it. A reinforcing tube (3) is fixed between the front connecting tube (14) and the tail tube (2). The two ends of the reinforcing tube (3) are respectively welded to the front connecting tube (14) and the tail tube (2) on opposite sides. Two reinforcing tubes (3) are symmetrically arranged on the left and right sides of the main beam tube (1).

3. A reinforced motorcycle underbone frame according to claim 2, characterized in that: The rear end of the reinforcing tube (3) is bent and attached to the outer wall of the tailstock tube (2) through the tube wall. The rear end of the reinforcing tube (3) is deformed inward into an arc part (31). The arc surface of the outer wall of the arc part (31) is attached to the surface shape of the tailstock tube (2).

4. A reinforced motorcycle underbone frame according to claim 2, characterized in that: A support tube (4) is fixed on the reinforcing tube (3), and a middle mounting seat (41) is fixed between the tops of the two support tubes (4). A seat cushion pivot (42) is fixed on the middle mounting seat (41). A baffle (43) is fixed between the two support tubes (4). A fuel tank mounting position (5) is formed between the support tube (4) facing the tailstock tube (2) and the two reinforcing tubes (3).

5. A reinforced motorcycle underbone frame according to claim 4, characterized in that: The top end of the support tube (4) is fixed with a positioning rod (44), which is positioned upwards.

6. A reinforced motorcycle underbone frame according to claim 4, characterized in that: An inclined reinforcing plate (45) is fixed between the supporting tube (4) and the reinforcing tube (3), and the reinforcing plate (45) is provided with a circular hole and an oblong hole.

7. A reinforced motorcycle underbone frame according to claim 4, characterized in that: The support tube (4) is fixed with a rear mounting plate (46), which has holes. The outer ends of the two rear mounting plates (46) are far apart from each other and extend obliquely to the rear side of the support tube (4).

8. A reinforced motorcycle underbone frame according to claim 4, characterized in that: The support tube (4) is fixed with a front mounting plate (47), which has holes and the outer ends of the two front mounting plates (47) extend toward the front of the support tube (4).

9. A reinforced motorcycle underbone frame according to claim 1, characterized in that: Several connecting plates (21) are fixed between the two tailstock tubes (2), and the connecting plates (21) are provided with multiple holes; a U-shaped plate (22) is fixed on the tailstock tube (2), the opening of the U-shaped plate (22) is set downward, the tailstock tube (2) is located inside the opening of the U-shaped plate (22), and multiple mounting holes are provided on the two side walls and the top surface of the U-shaped plate (22), and the top surface of the U-shaped plate (22) is higher than the top surface of the connecting plates (21).

10. A reinforced motorcycle underbone frame according to claim 1, characterized in that: The main beam tube (1) has a cross-sectional length of 6 cm, a cross-sectional width of 4 cm, and a wall thickness of 2.5 cm.

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