A tricycle frame structure

Abstract

The present application relates to the technical field of tricycle, provide a kind of tricycle frame structure, comprising: front section frame, the front section frame includes a front main beam that is bent into shape, the front end of the front main beam is equipped with steering head connecting piece, the front main beam is welded with front connecting piece, and the front connecting piece includes the butt protruding column that extends backwards and the fixed plate that extends upwards;Rear section frame is detachably connected to the rear of the front section frame, and the rear section frame includes rear main frame and rear connecting lug arranged at the front end of rear main frame, and the rear connecting lug is butted with the butt protruding column and is locked and fixed.The present application overcomes the deficiencies of prior art, and the design is reasonable, the structure is compact, the front section frame and the rear section frame are connected by butt protruding column, rear connecting lug and bolt locking, can be quickly disassembled or combined, greatly reduces the storage and transportation volume, when maintaining, damaged module can be replaced separately, and the practicality is strong.

Description

Technical Field

[0001] This invention relates to the field of tricycle technology, and more specifically to a tricycle frame structure. Background Technology

[0002] Existing tricycle frames generally adopt a one-piece welded structure, which is not only bulky, causing inconvenience for packaging, transportation, and daily storage, but also often requires replacement of the entire frame in case of partial damage, resulting in high maintenance costs. Furthermore, the motor mounting area usually lacks reliable lateral restraint and reinforcement designs, making the motor prone to lateral swaying during vehicle operation. This affects the smoothness of power output and shortens the lifespan of related structures. In addition, the rear frame, which supports the motor and rear basket, lacks effective reinforcement measures in terms of torsional and bending resistance, making it prone to deformation or fatigue damage after long-term use, affecting the overall safety and durability of the vehicle. Therefore, we propose a new tricycle frame structure. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the present invention provides a three-wheeled vehicle frame structure that overcomes the deficiencies of the prior art, has a reasonable design and compact structure, and solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a tricycle frame structure, comprising:

[0005] The front frame includes a front main beam that has been bent and formed. The front end of the front main beam is provided with a steering connector. A front connector is welded on the front main beam. The front connector includes a rearwardly extending mating protrusion and an upwardly extending fixing plate.

[0006] The rear frame is detachably connected to the rear of the front frame. The rear frame includes a rear main frame and a rear connecting lug located at the front end of the rear main frame. The rear connecting lug engages with and locks the mating protrusion.

[0007] A seat assembly is fixedly installed on the fixing plate. The seat assembly includes a seat frame, a seat cushion, and a backrest. The seat cushion and the backrest are respectively fixed to the seat frame.

[0008] The shock absorber has its two ends connected between the fixed plate and the rear main frame, respectively.

[0009] Preferably, the seat frame includes a bottom support frame, a back support rod, and a headrest support frame. The bottom support frame has a frame structure, and the lower end of the back support rod is welded to the bottom support frame, while the upper end extends backward at an angle and is welded to the headrest support frame.

[0010] Preferably, the rear main frame has a rectangular or U-shaped enclosed structure, and the rear connecting ears are symmetrically arranged at the ends of the rear main frame.

[0011] Preferably, the rear main frame includes a left frame portion and a right frame portion arranged opposite to each other. A rear fixing component is connected to both the left frame portion and the right frame portion. The rear fixing component includes multiple pipes, which together form a frame structure. A bearing plane is formed on the top of the frame structure for fixing the rear basket. A motor mounting space is formed inside the frame structure.

[0012] Preferably, the rear connecting ear is connected to one end of the left frame portion and the right frame portion away from the rear fixing component.

[0013] Preferably, the rear fixing assembly includes two spaced axle sleeves, one end of which is connected to the rear end of the left frame and the right frame respectively, and the two axle sleeves are connected to the tailpipe.

[0014] Preferably, two rear basket support tubes are welded to the top of the tailpipe, and the front ends of the two rear basket support tubes are respectively welded to the left frame and the right frame. A rear basket fixing assembly is connected between the two rear basket support tubes. The rear basket fixing assembly includes two parallel mounting tubes. The two ends of each mounting tube are respectively fixed to the two rear basket support tubes. A pair of mounting plates are fixed between the two mounting tubes. Each mounting plate has a strip groove along its length.

[0015] Preferably, a motor mounting bracket is welded to the bottom of the tailpipe, and a pair of reinforcing ribs are welded between the tailpipe and the motor mounting bracket.

[0016] Preferably, a pair of transverse support beams are welded onto the tailpipe, with the two transverse support beams located on both sides of the motor to limit the movement of the motor.

[0017] Preferably, a reinforcing assembly is welded onto the rear frame. The reinforcing assembly includes two reinforcing tubes arranged in parallel, and both ends of each reinforcing tube are welded and fixed to the rear main frame and the corresponding axle sleeve, respectively.

[0018] This invention provides a three-wheeled vehicle frame structure. It has the following beneficial effects:

[0019] 1. The front and rear frames are connected by mating protrusions, rear connecting lugs and bolts, which can be quickly disassembled or assembled, greatly reducing the storage and transportation volume. Damaged modules can be replaced individually during maintenance, making it highly practical.

[0020] 2. By installing shock absorbers between the front frame mounting plate and the rear main frame, an elastic connection system is formed, which can effectively absorb road vibrations and significantly improve the driving experience under bumpy road conditions.

[0021] 3. The rear basket fixing assembly uses a mounting tube and a mounting plate with a strip groove. The rear basket can slide and lock along the strip groove, allowing users to easily adjust the front and rear position of the rear basket according to their carrying needs, thus expanding its practicality.

[0022] 4. The motor mounting bracket, together with the transverse support beam and reinforcing ribs, not only effectively limits the lateral movement of the motor to prevent lateral swaying, but also enhances the structural strength of the mounting bracket, ensuring smooth and durable power output.

[0023] 5. The rear frame is connected to the rear main frame and the axle sleeve through a reinforcing tube, forming a triangular reinforcement zone, which significantly improves the torsional and bending resistance. The enclosed frame composed of the rear basket support tube, tail tube, etc., further enhances the overall rigidity and load-bearing capacity, making the structure more stable and safe. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure for mounting a seat assembly on the front frame of the present invention.

[0026] Figure 3 This is a schematic diagram of the front frame structure of the present invention.

[0027] Figure 4 This is an exploded view of the seat assembly structure of the present invention.

[0028] Figure 5 This is a top view of the rear frame structure of the present invention.

[0029] Figure 6 This is a front view schematic diagram of the rear frame structure of the present invention.

[0030] Figure 7 This is a top view of the structure of the rear-mounted fixing component of the present invention.

[0031] Figure 8 This is a top view of the rear basket fixing assembly structure of the present invention.

[0032] In the diagram: 11. Front main beam; 12. Steering connector at the front of the vehicle; 13. Connecting post; 14. Fixing plate; 21. Rear main frame; 211. Left frame section; 212. Right frame section; 231. Axle sleeve; 232. Tailpipe; 233. Rear basket support tube; 22. Rear connecting lug; 24. Motor mounting bracket; 25. Reinforcing rib; 26. Transverse support beam; 31. Seat frame; 311. Bottom support frame; 312. Backrest support rod; 313. Headrest support frame; 32. Seat cushion; 33. Backrest; 4. Shock absorber; 51. Mounting tube; 52. Mounting plate; 53. Strip groove; 6. Reinforcing tube. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0034] like Figures 1 to 8 As shown, this embodiment provides a three-wheeled vehicle frame structure, which mainly includes a front frame, a rear frame, a seat assembly, and a shock absorber 4. The front frame is used to mount the steering system and seat assembly. The rear frame is detachably connected to the rear of the front frame to support components such as the motor and rear basket. The shock absorber 4 is connected between the front and rear frames to buffer driving vibrations and improve riding comfort.

[0035] The front frame includes a bent front main beam 11, which is made of high-strength steel tubing bent using a pipe bending machine, forming a curved structure adapted to the vehicle's shape. A steering connector 12 is fixedly mounted at the front end of the front main beam 11. The steering connector 12 has a shaft hole for mounting the front fork stem, enabling handlebar steering. A front connector is welded to the front main beam 11, and the front connector has a mating protrusion 13 and a fixing plate 14. The mating protrusion 13 is generally block-shaped or tubular, with transverse through holes for locking to the rear frame. The fixing plate 14 is flat, with multiple mounting holes for fixing the seat assembly and connecting the shock absorber 4.

[0036] The rear frame is detachably connected to the rear of the front frame. The rear frame includes a rear main frame 21 and rear connecting ears 22 disposed at the front end of the rear main frame 21. In this embodiment, the rear main frame 21 has a U-shaped enclosure structure, which includes a left frame portion 211 and a right frame portion 212 disposed opposite to each other. The left frame portion 211 and the right frame portion 212 are formed by bending or welding metal tubing. The rear connecting ears 22 are symmetrically disposed at the ends of the rear main frame 21. Specifically, the rear connecting ears 22 are welded or integrally formed at the front ends of the left frame portion 211 and the right frame portion 212, that is, at the ends opposite to the rear fixing components. Each rear connecting ear 22 has a connecting hole adapted to the mating protrusion 13. During assembly, the mating protrusion 13 is inserted into or fits against the rear connecting ear 22 and locked by bolts, thereby firmly and detachably connecting the front frame and the rear frame together.

[0037] The seat assembly is fixedly mounted on the aforementioned fixing plate 14. The seat assembly includes a seat frame 31, a seat cushion 32, and a backrest 33. The seat frame 31 includes a bottom support frame 311, back support rods 312, and a headrest support frame 313. The bottom support frame 311 is a rectangular or trapezoidal frame structure welded from tubing and fastened to the fixing plate 14 with bolts. There are four back support rods 312, the lower ends of which are welded to corresponding positions on the bottom support frame 311, and the upper ends extend backward at an angle and are welded to corresponding positions on the headrest support frame 313. The headrest support frame 313 has an arc-shaped or U-shaped bent tube structure. The seat cushion 32 is fixed to the bottom support frame 311, and the backrest 33 is fixed to the back support rods 312 and the headrest support frame 313 to form a comfortable seat.

[0038] The shock absorber 4 is connected at both ends to the fixed plate 14 and the rear main frame 21, respectively. Specifically, the lower part of the fixed plate 14 is provided with a lower hinge seat, and the left frame portion 211 and right frame portion 212 of the rear main frame 21 are respectively welded with upwardly extending shock absorber 4 mounting lugs. The lower end of the shock absorber 4 is hinged to the fixed plate 14 by bolts, and the upper end is hinged to the shock absorber 4 mounting lugs by bolts. In this way, the front frame, the rear frame and the shock absorber 4 form a flexible connection system that effectively absorbs road bumps.

[0039] A rear-mounted fixing assembly is connected to both the left frame portion 211 and the right frame portion 212 of the rear main frame 21. The rear-mounted fixing assembly includes multiple tubular components, which, together with the left frame portion 211 and the right frame portion 212, form a stable frame structure. Specifically, the rear-mounted fixing assembly includes two spaced-apart axle sleeves 231, one end of which is welded and fixed to the rear end of the left frame portion 211 and the right frame portion 212, respectively. The other ends of the two axle sleeves 231 are connected to a tailpipe 232, which connects the left and right axle sleeves 231 into a single unit. Thus, the left frame portion 211, the right frame portion 212, the axle sleeves 231, and the tailpipe 232 enclose a receiving space. A load-bearing plane is formed above this frame structure for fixing cargo-carrying devices such as the rear basket, while the interior of the frame structure forms a space for motor installation.

[0040] To facilitate the installation of the rear basket, two rear basket support tubes 233 are welded to the top of the tail tube 232. These two support tubes are parallel and extend upwards and backwards, with their front ends welded and fixed to the left frame portion 211 and the right frame portion 212, respectively, to enhance overall rigidity and load-bearing capacity. A rear basket fixing assembly connects the two support tubes 233. The rear basket fixing assembly includes two parallel mounting tubes 51, each with its ends fixed to the two support tubes 233 by welding or bolts. A pair of mounting plates 52 are fixed between the two mounting tubes 51, each with a slot 53 along its length. The rear basket can be slidably locked within the slot 53 by bolts, allowing for flexible adjustment of the rear basket's position.

[0041] In the construction of the motor mounting space, a motor mounting bracket 24 is welded to the bottom of the tailpipe 232. The motor mounting bracket 24 is made of plate or tubing and is used to support the drive motor. To improve the structural strength of the motor mounting bracket 24, a pair of reinforcing ribs 25 are welded between the tailpipe 232 and the motor mounting bracket 24. The reinforcing ribs 25 are inclined to effectively distribute stress. In addition, a pair of transverse support beams 26 are welded to the tailpipe 232. The two transverse support beams 26 are located on the left and right sides of the mounted motor, respectively, to provide lateral restraint for the motor, prevent lateral swaying of the motor during operation, and ensure the stability of power output.

[0042] To further enhance the overall rigidity of the rear frame, a reinforcing component is welded onto it. This reinforcing component includes two reinforcing tubes 6, which are arranged in parallel, with both ends of each tube welded and fixed to the rear main frame 21 and the corresponding axle sleeve 231, respectively. Specifically, one end of the reinforcing tube 6 is welded to the middle of the left frame portion 211 or the right frame portion 212, and the other end is welded to the outer wall of the axle sleeve 231 on the same side, thereby forming a stable triangular reinforcement area, which significantly improves the torsional and bending resistance of the rear frame.

[0043] During assembly, the seat assembly can first be bolted to the mounting plate 14 of the front frame, and the rear wheel, motor, and other components can be installed on the axle sleeve 231 and motor mounting bracket 24 of the rear frame. Then, align the rear connecting lug 22 of the rear frame with the mating protrusion 13 of the front frame, insert the bolts, and tighten them. Finally, connect both ends of the shock absorber 4. Disassembly is performed by reversing the operation, which is extremely convenient.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tricycle frame structure, characterized in that, include: The front frame includes a front main beam (11) formed by bending, the front main beam (11) is provided with a front steering connector (12) at the front end, and a front connector is welded on the front main beam (11). The front connector includes a rearwardly extending docking protrusion (13) and an upwardly extending fixing plate (14). The rear frame is detachably connected to the rear of the front frame. The rear frame includes a rear main frame (21) and a rear connecting lug (22) located at the front end of the rear main frame (21). The rear connecting lug (22) engages with the mating protrusion (13) and is locked in place. The seat assembly is fixedly installed on the fixing plate (14). The seat assembly includes a seat frame (31), a seat cushion (32) and a backrest (33). The seat cushion (32) and the backrest (33) are respectively fixed to the seat frame (31). The shock absorber (4) is connected at both ends between the fixed plate (14) and the rear main frame (21).

2. The tricycle frame structure according to claim 1, characterized in that, The seat frame (31) includes a bottom support frame (311), a back support rod (312) and a headrest support frame (313). The bottom support frame (311) has a frame structure. The lower end of the back support rod (312) is welded to the bottom support frame (311), and the upper end extends backward and is welded to the headrest support frame (313).

3. The tricycle frame structure according to claim 1, characterized in that, The rear main frame (21) has a rectangular or U-shaped enclosed structure, and the rear connecting ears (22) are symmetrically arranged at the ends of the rear main frame (21).

4. The tricycle frame structure according to claim 1, characterized in that, The rear main frame (21) includes a left frame (211) and a right frame (212) arranged opposite to each other. A rear fixing component is connected to the left frame (211) and the right frame (212). The rear fixing component includes multiple pipes, which form a frame structure. A bearing plane is formed on the top of the frame structure for fixing the rear basket. A motor installation space is formed inside the frame structure.

5. A tricycle frame structure according to claim 4, characterized in that, The rear connecting ear (22) is connected to the left frame portion (211) and the right frame portion (212) at one end away from the rear fixing component.

6. A tricycle frame structure according to claim 4, characterized in that, The rear fixing assembly includes two spaced axle sleeves (231), one end of which is connected to the rear end of the left frame (211) and the right frame (212) respectively, and the two axle sleeves (231) are connected to the tailpipe (232).

7. A tricycle frame structure according to claim 6, characterized in that, Two rear basket support tubes (233) are welded to the top of the tail tube (232). The front ends of the two rear basket support tubes (233) are welded to the left frame part (211) and the right frame part (212) respectively. A rear basket fixing assembly is connected between the two rear basket support tubes (233). The rear basket fixing assembly includes two parallel mounting tubes (51). The two ends of each mounting tube (51) are fixed to the two rear basket support tubes (233) respectively. A pair of mounting plates (52) are fixed between the two mounting tubes (51). Each mounting plate (52) has a strip groove (53) along its length direction.

8. A tricycle frame structure according to claim 6, characterized in that, A motor mounting bracket (24) is welded to the bottom of the tailpipe (232), and a pair of reinforcing ribs (25) are welded between the tailpipe (232) and the motor mounting bracket (24).

9. A tricycle frame structure according to claim 8, characterized in that, A pair of transverse support beams (26) are welded onto the tailpipe (232). The two transverse support beams (26) are located on both sides of the motor to limit the motor.

10. A tricycle frame structure according to claim 6, characterized in that, The rear frame is also welded with a reinforcing component, which includes two reinforcing tubes (6). The two reinforcing tubes (6) are arranged in parallel, and the two ends of each reinforcing tube (6) are welded and fixed to the rear main frame (21) and the corresponding axle sleeve (231), respectively.

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