Rear side frame of two-wheeled vehicle

Abstract

This utility model relates to the field of two-wheeled vehicle accessories technology, specifically to a rear side frame for a two-wheeled vehicle. It includes a rear side frame body, with an inclined upper support wing plate fixed to the outer side of the upper connecting arm of the rear side frame body. The upper support wing plate has its edge vertically bent to form a fixed edge with a first fixing hole. An L-shaped lower support tube is fixed to the outer side of the lower extension arm, with a horizontal fixing tube and a second fixing hole at its end. The side box mounting plate is rigidly connected to the fixed edge and fixing tube at two nodes via fasteners, forming a collaborative support structure. This utility model significantly improves the load-bearing capacity of the side box through the synergistic effect of the inclined upper support wing plate and the rigid connection surface structure of the fixed edge and fixing tube at two nodes. The inclined design of the upper support wing plate distributes the load, and the rounded transition of the L-shaped lower support tube enhances torsional resistance.

Description

Technical Field

[0001] This utility model belongs to the technical field of two-wheeled vehicle accessories, and in particular relates to a rear side frame for two-wheeled vehicles. Background Technology

[0002] The rear rack, also known as the middle rack, is generally installed at the rear of two-wheeled vehicles (such as motorcycles and electric vehicles). As the core load-bearing structure of the side boxes, it is used to increase the loading capacity of the two-wheeled vehicle, and its rigidity directly affects driving safety.

[0003] In the prior art, such as the quick-release middle rack for motorcycles disclosed in publication number CN209274789U, although the assembly and disassembly efficiency is improved by adjusting the threaded rod and snap hook, the side boxes are only connected by a movable flip shaft, resulting in a weak load-bearing structure that is prone to torsional deformation under bumpy conditions. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a rear side frame for two-wheeled vehicles.

[0005] The objective of this utility model can be achieved through the following technical solution: A rear side frame for a two-wheeled vehicle, comprising a rear side frame body, the rear side frame body having symmetrically arranged upper connecting arms, a lower extension arm extending downward from the upper connecting arms, and a crossbar connecting the two lower extension arms. The crossbar is provided with a mounting ear with a first mounting hole. The inner side of the upper connecting arm is provided with a mounting plate with a second mounting hole. It also includes a side box mounting side plate. The outer side of the upper connecting arm is fixedly connected with a downwardly inclined upper support wing plate. The outer edge of the upper support wing plate is bent to form a vertically arranged fixed edge. The outer side of the lower extension arm is fixedly connected with a lower support tube. The end of the lower support tube is provided with a horizontally arranged fixed tube. The side box mounting side plate is vertically arranged and detachably fixed to the fixed edge and the fixed tube.

[0006] Preferably, at least two first fixing holes are provided on the fixing edge, and a second fixing hole is provided inside the fixing tube. The upper and lower edges of the side box mounting plate are respectively provided with connecting holes corresponding to the first fixing holes and the second fixing holes. The side box mounting plate is detachably connected to the rear frame body by installing fasteners on the corresponding first fixing holes and second fixing holes.

[0007] Preferably, the upper support wing plate is inclined at 35°-45° relative to the horizontal plane.

[0008] Preferably, the lower support tube is L-shaped and its bend has a rounded transition structure.

[0009] Preferably, the front end of the side box mounting plate is provided with a clearance portion that folds inward toward the inside of the vehicle body.

[0010] Preferably, the avoidance section is folded inwards towards the inside of the vehicle body at a angle of 15°-20°.

[0011] Preferably, a U-shaped mounting rod is vertically fixed to the upper surface of the lower extension arms on both sides.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. The load-bearing capacity of the side box is significantly improved through the synergistic effect of the inclined upper support wing plate and the fixed side plus the fixed pipe double node rigid connection surface structure.

[0014] 2. The inclined design of the upper support wing plate decomposes the load, and combined with the L-shaped lower support tube with a rounded transition, it eliminates stress concentration and improves torsional resistance.

[0015] 3. The avoidance section is designed to fold inwards towards the inside of the vehicle to reduce the risk of leg collision for the rider and simultaneously reduce wind resistance;

[0016] 4. The U-shaped mounting rod provides modular expansion and can work in conjunction with the avoidance part at the front and rear ends to reduce high-frequency vibration. Attached Figure Description

[0017] Figure 1 This is an isometric view of the overall structure of this utility model.

[0018] Figure 2 This is the front elevation view of this utility model.

[0019] Figure 3 This is a side elevation view of the present invention.

[0020] Figure 4 This is a side elevation view of the disassembled rear frame main body and side box mounting side plate structure of this utility model.

[0021] Figure 5 This is a top view of the present invention.

[0022] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure at point AA.

[0023] In the diagram, 1. Rear frame main body; 11. Upper connecting arm; 12. Lower extension arm; 13. Crossbar; 14. Mounting lug; 141. First mounting hole; 15. Mounting plate; 151. Second mounting hole; 16. Upper support wing plate; 17. Fixed edge; 171. First fixing hole; 18. Lower support tube; 181. Fixing tube; 182. Second fixing hole; 2. Side box mounting side plate; 21. Connecting hole; 22. Clearance part; 3. Addition rod. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] like Figures 1-6 As shown, this embodiment discloses a rear side frame for a two-wheeled vehicle, including a rear side frame body 1. The rear side frame body 1 has symmetrically arranged upper connecting arms 11, lower extension arms 12 that bend downward from the upper connecting arms 11, and crossbars 13 connecting the two lower extension arms 12. The crossbars 13 are provided with mounting ears 14 with first mounting holes 141. The inner side of the upper connecting arms 11 is provided with mounting plates 15 with second mounting holes 151. The embodiment is characterized by further including a side box mounting side plate 2. The outer side of the upper connecting arms 11 is fixedly connected to a downwardly inclined upper support wing plate 16. The outer edge of the upper support wing plate 16 is bent to form a vertically arranged fixed edge 17. The outer side of the lower extension arms 12 is fixedly connected to a lower support tube 18. The end of the lower support tube 18 is provided with a horizontally arranged fixed tube 181. The side box mounting side plate 2 is vertically arranged and is detachably fixed to the fixed edge 17 and the fixed tube 181.

[0026] Furthermore, at least two first fixing holes 171 are provided on the fixing edge 17, and a second fixing hole 182 is provided in the fixing tube 181. The upper and lower edges of the side box mounting plate 2 are respectively provided with connecting holes 21 corresponding to the first fixing holes 171 and the second fixing holes 182. The side box mounting plate 2 is detachably connected to the rear frame body 1 by installing fasteners on the corresponding first fixing holes 171 and second fixing holes 182.

[0027] Furthermore, the upper support wing plate 16 is inclined at 35°-45° relative to the horizontal plane.

[0028] The upper support wing plate 16 is designed to be inclined at 35°-45° relative to the horizontal plane, so that the load of the side box is distributed and transferred along the plate surface. Compared with traditional vertical supports, this effectively reduces stress concentration. The fixed edge 17 and the fixed tube 181 form a rigid clamping surface, ensuring stable support for the side box while improving bending stiffness. The horizontal end face of the fixed tube 181 provides full contact support, eliminating fretting wear on the side plate 2 of the side box mounting.

[0029] The upper support wing plate 16 and the lower support tube 18 are integrally formed by continuous bending to improve structural strength. The side box mounting side plate 2 is designed to be detachable, making it flexible and convenient to use, and reducing transportation volume and storage costs.

[0030] Furthermore, such as Figure 1 , Figure 5 As shown, the lower support tube 18 is L-shaped and its bend is a rounded transition structure.

[0031] The L-shaped lower support tube 18 has a rounded transition structure, which reduces the risk of the right-angle bend colliding with other objects and improves safety.

[0032] Furthermore, such as Figure 1 , Figure 3 As shown, the front end of the side box mounting plate 2 is provided with a clearance part 22 that folds into the vehicle body.

[0033] The avoidance part 22 folds inward at 15°-20° towards the inside of the vehicle body, causing the front end of the side box mounting side plate 2 to retract towards the inside of the vehicle body, thus preventing the front end of the side box mounting side plate 2 from colliding with the rider's legs, and reducing the wind resistance caused by the wind flowing between the side box mounting side plate 2 and the vehicle body during riding.

[0034] Furthermore, a U-shaped mounting rod 3 is vertically fixed to the upper surface of the lower extension arms 12 on both sides.

[0035] The vertically fixed U-shaped mounting rod 3 can be used to install a backrest structure for expanded functional integration. Simultaneously, under the impact of road bumps, the vertically projecting structure formed by the U-shaped mounting rod 3 can also be considered a damping lever to reduce high-frequency vibrations, and can cooperate with the avoidance part 22 to achieve front-to-rear coordination. The principle is that when the main structure (rear frame body 1, side box mounting plate 2) experiences high-frequency vibration, the projecting structure, due to inertia, generates a reverse motion, forming a force opposite to the direction of the main vibration, thus offsetting some of the vibration energy.

[0036] The working principle of the rear side frame of this two-wheeled vehicle in practical applications:

[0037] During installation, the rear side frame body 1 is first fixed to the two-wheeled vehicle frame through the second mounting hole 151 of the mounting plate 15. At the same time, the rear side frame body 1 is fixed to the rear of the two-wheeled vehicle through the first mounting hole 141 of the mounting ear 14 to enhance overall stability. Then, the upper edge of the side box mounting plate 2 is attached to the fixing edge 17 and the lower edge is attached to the fixing tube 181. The assembly is completed by fastening the fasteners through the connecting hole 21 and the first fixing hole 171 and the second fixing hole 182.

[0038] The longitudinal load transfer path during the working process is as follows: the side box load causes the side box mounting plate 2 to be compressed. The load is decomposed into vertical / horizontal components through the inclined surface of the upper support wing plate 16. The vertical component is transferred to the upper connecting arm 11 by the fixed side 17, and the horizontal component is absorbed by the lower support pipe 18.

[0039] Anti-torsional load mechanism: When the two-wheeled vehicle turns, the centrifugal force of the side box is transmitted to the side box mounting plate 2, which generates a torsional tendency. At least two first fixing holes 171 are opened on the fixed side 17, which can form an upper and lower constraint support surface with the fixing tube 181. The bending design of the L-shaped lower support tube 18 is used to counteract the torsional tendency.

[0040] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A rear side frame for a two-wheeled vehicle, comprising a rear side frame body (1), the rear side frame body (1) having symmetrically arranged upper connecting arms (11), lower extending arms (12) extending downward from the upper connecting arms (11), and crossbars (13) connecting the two lower extending arms (12), the crossbars (13) having mounting ears (14) with first mounting holes (141), and the inner side of the upper connecting arms (11) having mounting plates (15) with second mounting holes (151), characterized in that, It also includes a side box mounting plate (2), an upper support wing plate (16) that is inclined downward is fixed to the outer side of the upper connecting arm (11), the outer edge of the upper support wing plate (16) is bent to form a vertically set fixed edge (17), a lower support tube (18) is fixed to the outer side of the lower extension arm (12), and a horizontally set fixed tube (181) is provided at the end of the lower support tube (18). The side box mounting plate (2) is vertically set and is attached to the fixed edge (17) and the fixed tube (181) and can be detachably fixed.

2. The rear side frame of a two-wheeled vehicle according to claim 1, characterized in that, At least two first fixing holes (171) are provided on the fixed side (17), and a second fixing hole (182) is provided in the fixed tube (181). The upper and lower edges of the side box mounting plate (2) are respectively provided with connecting holes (21) corresponding to the first fixing hole (171) and the second fixing hole (182). The side box mounting plate (2) is detachably connected to the rear frame body (1) by installing fasteners on the corresponding first fixing hole (171) and second fixing hole (182).

3. The rear side frame of a two-wheeled vehicle according to claim 1, characterized in that, The upper support wing plate (16) is inclined at 35°-45° relative to the horizontal plane.

4. The rear side frame of a two-wheeled vehicle according to claim 1, characterized in that, The lower support tube (18) is L-shaped and its bend is a rounded transition structure.

5. The rear side frame of a two-wheeled vehicle according to claim 1, characterized by, The side box mounting side plate (2) has a clearance part (22) that folds into the inside of the vehicle body at its front end.

6. A rear side frame for a two-wheeled vehicle according to claim 5, characterized in that, The avoidance part (22) folds inwards 15°-20° towards the inside of the vehicle body.

7. A two-wheeled vehicle rear side frame according to claim 1 or 5, characterized in that, The upper surface of the lower extension arms (12) on both sides is vertically fixed with a U-shaped mounting rod (3).

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