A motorcycle rear rack

Abstract

This utility model discloses a motorcycle rear rack, belonging to the field of motorcycle parts technology. It includes a rear rack body, a load-bearing connecting plate, and a support frame. A transverse support platform is provided on the inner side of the rear of the rear rack body. The load-bearing connecting plate is detachably fixed to the support platform via bolt assemblies, enabling quick assembly and disassembly of the rear box mounting module. The support frame consists of a main body connecting part and a longitudinal support part. The longitudinal support part forms a triangular rigid connection structure with the lower surface of the rear of the rear rack body via a support rod, decomposing dynamic loads into axial pressure and tension, which are then transmitted to the frame. In the optimized design, the load-bearing connecting plate has an integrated interface of strip-shaped fixing holes and binding holes. The front airflow guide part can reduce wind resistance and form an air curtain to isolate dust and exhaust fumes raised by the rear wheel. This utility model, through its modular and detachable design and triangular mechanical structure, solves the defects of traditional welded racks, such as inconvenient assembly and disassembly and insufficient dynamic load-bearing capacity. It possesses core advantages such as high assembly and disassembly efficiency, strong impact resistance, and flexible functional expansion.

Description

Technical Field

[0001] This utility model belongs to the field of motorcycle parts technology, and in particular relates to a motorcycle rear rack. Background Technology

[0002] The motorcycle rear rack, also known as the rear rack, is an important load-bearing structure at the rear of the vehicle and is widely used in scenarios such as tail box installation, cargo transportation, and securing riding equipment.

[0003] Traditional rear racks typically employ a one-piece welded structure, where the connectors for mounting the tail box are fixed to the main body of the rack by welding, forming a non-removable unit. For example, Chinese Utility Model Patent Publication No. CN203094260U discloses a motorcycle rear rack where the connecting mounting plate at the front is designed as a single piece. This design prevents deformation during welding, ensuring the flatness of the weld between the connecting mounting plate and the left and right connecting pipes. Figure 1 It can be clearly seen that the connectors used to install the tail box are also integrally welded to the main body of the rack.

[0004] Although welding can ensure the stability of the connection, users often need to adjust the function of the rear rack according to the load requirements in daily use. For example, when transporting oversized items, the rear box needs to be temporarily removed, or even the connecting parts need to be removed to free up space. The irreversibility of the welded structure limits the functional expansion of the rack and makes it difficult to adapt to different sizes of rear boxes or external equipment, resulting in insufficient flexibility in disassembly and assembly. At the same time, the rear rack needs to withstand the inertial impact of the items inside the rear box and the vibration caused by road bumps. Traditional rear racks lack effective support for the dynamic load at the end of the rear rack, resulting in weak dynamic load-bearing performance. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a motorcycle rear rack.

[0006] The objective of this utility model can be achieved through the following technical solution: A motorcycle rear tail rack includes a rear tail rack body, a load-bearing connecting plate, and a support frame. The rear of the rear tail rack body is provided with a laterally extended support platform. The load-bearing connecting plate is detachably fixed to the support platform by fasteners. The support frame includes a main body connecting part and a longitudinal support part. The main body connecting part is fixed to the lower surface of the front end of the rear tail rack body. The longitudinal support part extends from the main body connecting part toward the vehicle body installation direction. The longitudinal support part forms at least one rigid connection point with the lower surface of the rear of the rear tail rack body through a support rod.

[0007] Preferably, the surface of the load-bearing connecting plate is provided with several strip-shaped fixing holes, and the tail of the load-bearing connecting plate is provided with a notch that cooperates with the rear tail frame body to form a binding hole.

[0008] Preferably, the fastener is a bolt assembly that passes through the bearing connecting plate and the support platform, with a plurality of first fixing holes provided along the edge of the bearing connecting plate, and a second fixing hole corresponding to the first fixing hole provided on the support platform.

[0009] Preferably, the longitudinal support portion of the support frame and the rear tail frame body form a triangular rigid connection structure through support rods, with the two ends of the support rods welded to the end of the longitudinal support portion and the lower surface of the rear tail frame body, respectively.

[0010] Preferably, the front end of the bearing connecting plate is provided with a downwardly bent guide portion, and the bending angle α is 15°-45°.

[0011] Preferably, the rear tail frame body has symmetrical mounting plates on the inner side of the front end, the mounting plates have a first mounting hole for connecting with the motorcycle frame, and the longitudinal support part has a mounting ear with a second mounting hole at its end.

[0012] Preferably, the rear tail frame body is provided with symmetrical handrails at the front end, and the handrails are integrally formed with the rear tail frame body by welding or by bolt connection.

[0013] Preferably, the lower surface of both the rear tail frame body and the body connection portion is provided with rope hooks.

[0014] Preferably, the support rod is configured as one of two parallel straight rods, an A-shaped rod that intersects at the top, a three-pronged Y-shaped rod, or an H-shaped frame with a combination of horizontal and vertical elements.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The modular and detachable design enables efficient function switching and maintenance. The load-bearing connecting plate and the horizontal support platform are detachably connected, allowing users to quickly disassemble and assemble the tail box and the load-bearing connecting plate without cutting or damaging the structure.

[0017] 2. The triangular rigid support structure enhances dynamic load-bearing strength. The triangular rigid connection structure formed by the support rod, longitudinal support, and rear frame effectively improves bending stiffness through multi-path stress dispersion, and the vibration energy absorption efficiency is also effectively improved.

[0018] 3. The independent modular design supports partial replacement and maintenance, reducing repair costs. Furthermore, the integrated design of the strip-shaped fixing holes and lashing holes is compatible with most tail boxes and lashing tools on the market, significantly improving adaptability. Attached Figure Description

[0019] Figure 1 This is an isometric schematic diagram of the overall structure of this utility model.

[0020] Figure 2This is a schematic diagram showing the overall structure of this utility model disassembled.

[0021] Figure 3 This is a schematic diagram of the front elevation structure of the rear tail frame body and the connection part of the body.

[0022] Figure 4 This is a side elevation view of the present invention.

[0023] Figure 5 This is a cross-sectional structural diagram of the present invention.

[0024] In the diagram, 1. Rear frame main body; 11. Support platform; 111. Second fixing hole; 12. Mounting plate; 121. First mounting hole; 2. Bearing connecting plate; 21. Strip-shaped fixing hole; 22. Notch; 22a. Binding hole; 23. Guide part; 24. First fixing hole; 3. Support frame; 31. Main body connecting part; 32. Longitudinal support part; 33. Support rod; 34. Mounting ear; 341. Second mounting hole; 4. Fastener; 5. Rope hook; 6. Handrail. Detailed Implementation

[0025] 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.

[0026] like Figures 1-5 As shown, this embodiment discloses a motorcycle rear rack, including a rear rack body 1, a load-bearing connecting plate 2, and a support frame 3. The rear rack body 1 has a laterally extended support platform 11 on the inner side of its rear end. The load-bearing connecting plate 2 is detachably fixed to the support platform 11 by fasteners 4. The support frame 3 includes a main body connecting part 31 and a longitudinal support part 32. The main body connecting part 31 is fixed to the lower surface of the front end of the rear rack body 1. The longitudinal support part 32 extends from the main body connecting part 31 toward the vehicle body mounting direction. The longitudinal support part 32 forms at least one rigid connection point with the lower surface of the rear end of the rear rack body 1 through a support rod 33.

[0027] This embodiment achieves efficient assembly and disassembly of the rear frame and dynamic load bearing through modular connection design and optimized support structure. The specific working principle is as follows:

[0028] The modular connection structure allows the load-bearing connecting plate 2 to be placed on the transverse support platform 11 of the rear tail frame body 1 when the user needs to install the tail box. It is then fixed by fasteners 4 (such as bolt assemblies or quick-release pins). When disassembling, the load-bearing connecting plate 2 can be separated simply by releasing the fasteners 4 without damaging the main structure. This makes the tail box installation position an independent module, enabling flexible operation of function switching and space release.

[0029] With dynamic load dispersion design, during driving, the vertical pressure of the tail box is transmitted to the laterally extended support platform 11 through the load-bearing connecting plate 2, and is dispersed by the rear tail frame main body 1 as a whole; the impact force and vibration energy are dissipated through the longitudinal support part 32 and support rod 33 of the support frame 3 to form a triangular mechanical transmission path. The transmission path is from the rear tail frame main body 1 to the main body connecting part 31 or through the support rod 33 to the longitudinal support part 32, and finally dissipated at the frame mounting point, which significantly reduces the risk of stress concentration.

[0030] When subjected to strong impact and vibration energy, the longitudinal support 32 extends from the main body connection 31 towards the vehicle body mounting direction (e.g. Figure 2 , Figure 4 As shown in the figure, the longitudinal support portion 32 can further improve the energy absorption efficiency relative to the main body connection portion 31 through reversible elastic deformation.

[0031] like Figure 1 , Figure 2 As shown, the surface of the bearing connecting plate 2 is provided with several strip-shaped fixing holes 21, and the tail of the bearing connecting plate 2 is provided with a notch 22 that cooperates with the rear tail frame body to form a binding hole 22a.

[0032] The strip-shaped fixing holes 21 are arranged laterally along the bearing connecting plate 2. By selecting different positions of the strip-shaped fixing holes 21 to install the tail box, the front and rear positions of the tail box can be infinitely adjusted. Users can flexibly adjust the installation position of the tail box according to the needs of the center of gravity of the object or riding habits, avoiding the fixed spacing restrictions caused by traditional round fixing holes.

[0033] When the load-bearing connecting plate 2 aligns with the rear of the rear frame body 1 through the notch 22, the resulting lashing hole 22a allows for the direct insertion of straps, ropes, or quick-release hooks, creating a tool-free cargo anchor point. This integrates the tail box mounting surface and cargo lashing function into a single component, enabling rapid switching between loading modes. Simultaneously, the lashing hole 22a, through which a rope is inserted, can also serve as a towing point for the rear of the motorcycle.

[0034] Furthermore, the fastener is a bolt assembly that passes through the bearing connecting plate 2 and the support platform 11, and a plurality of first fixing holes 24 are provided along the edge of the bearing connecting plate, and a second fixing hole 111 corresponding to the first fixing holes 24 is provided on the support platform 11.

[0035] After the bolt assembly passes through the first fixing hole 24 and the second fixing hole 111 in sequence, the anti-loosening nut is screwed in to ensure that the connection surface fits without gaps. Multiple bolt assemblies are evenly distributed along the edge of the load-bearing connecting plate 2, which decomposes the vertical load of the tail box into multiple support pressures. The preload design of the bolt assembly can offset the periodic vibration generated during the motorcycle's operation, resulting in high connection reliability. When a single bolt assembly is damaged, it can be replaced independently, resulting in low maintenance costs.

[0036] Furthermore, the longitudinal support portion 32 of the support frame 3 and the rear tail frame body 1 form a triangular rigid connection structure through the support rod 33, and the two ends of the support rod 33 are respectively welded to the end of the longitudinal support portion 32 and the lower surface of the rear tail frame body 1.

[0037] The support rod 33, together with the longitudinal support 32 and the rear frame body 1, forms a closed triangular rigid frame. When the tail box is loaded, the vertical load is transmitted to the support rod 33 through the rear frame body 1, while the lateral impact force during travel is decomposed into axial pressure and tension by the angle formed by the longitudinal support 32 and the support rod 33, and finally dispersed to the frame through the welding point 34. At the same time, the triangular structure reduces the deformation of the structure itself by supporting each other on the three sides. Impact force or vibration energy can be transmitted in three directions through the three sides, forming a multi-path dispersion effect. This structure upgrades the linear force mode of traditional racks to a spatial force system balance, significantly improving structural stability.

[0038] like Figure 5 As shown, the front end of the bearing connecting plate 2 is provided with a downwardly bent guide section 23, and the bending angle α is 15°-45°.

[0039] The airflow guide 23 extends downwards at a bending angle α of 15°-45°, forming an airflow guiding surface. When the motorcycle is traveling at high speed, the incoming airflow is split into two streams on the surface of the airflow guide 23. The upper airflow smoothly slides along the plane of the load-bearing connecting plate 2, reducing the generation of vortices on the windward side of the tail box; the lower airflow is deflected by the airflow guide 23 to both sides of the rear wheel, forming an air curtain to isolate dust and exhaust fumes kicked up by the rear wheel, reducing cargo contamination. A logo can also be printed on the lower surface of the airflow guide 23 for display to vehicles or pedestrians behind.

[0040] like Figure 2 , Figure 3 , Figure 5 As shown, the rear tail frame body 1 has symmetrical mounting plates 12 on the inner side of the front end. The mounting plates 12 have a first mounting hole 121 for connecting with the motorcycle frame. The longitudinal support part 32 has a mounting ear 34 with a second mounting hole 341 at its end.

[0041] Mounting plate 12 and mounting ear 34 form a dual-node frame connection system. Mounting plate 12 is connected to the main frame of the motorcycle through the first mounting hole 121 and bears the vertical load of the rear frame body 1, such as the weight of the tail box and the weight of the cargo. Mounting ear 34 is connected to the subframe or rear swingarm of the motorcycle through the second mounting hole 341 and mainly transmits the dynamic load impact generated during driving, such as bumps and vibrations and braking inertia.

[0042] Furthermore, such as Figure 1 , Figure 2As shown, the rear tail frame body 1 is provided with symmetrical handrails 6 at the front end. The handrails 6 are integrally formed with the rear tail frame body 1 by welding or by bolt connection.

[0043] During riding, passengers can hold onto the handlebar 6 to maintain balance. Optionally, anti-slip textures can be provided on its surface to provide grip friction. The space formed by the handlebar 6 and the rear rack body 1 can quickly secure large-sized goods, and can also be used with straps threaded through the binding holes 22a to achieve three-point restraint. The handlebar 6 adopts a welding method suitable for high-strength scenarios (such as off-road vehicles). The handlebar 6 can be detached and installed through pre-set threaded holes, and the modular installation mode is more flexible.

[0044] Furthermore, such as Figure 2 , Figure 4 As shown, rope hooks 5 are provided on the lower surfaces of the rear tail frame body 1 and the body connection part 31.

[0045] Rope hooks 5 are distributed on the lower surface of the rear tail frame body 1 and the main body connection part 31, forming a multi-point, multi-dimensional binding network. For example, the cargo on the rear tail frame body 1 can be restrained from tipping over by cross straps, and the cargo can be tightened circumferentially by ring straps.

[0046] Furthermore, the configuration of the support rod 33 is one of two parallel straight rods, an A-shaped rod that intersects at the top, a three-pronged Y-shaped rod, or an H-shaped frame with a combination of horizontal and vertical elements.

[0047] The parallel straight bar configuration forms an equal-strength load band through parallel double bars, evenly transferring the pressure of the tail box to the frame, which is suitable for constant-speed loading scenarios on paved roads; the A-shaped bar creates a funnel-shaped stress concentration zone with an intersection angle, concentrating impact energy towards the centerline of the frame and optimizing the torsional performance in off-road conditions; the Y-shaped bar's three-pronged branches form a spatial force couple balance system, providing multi-dimensional constraints and suppressing rack sway when subjected to lateral wind or asymmetrical loading; the H-shaped frame's horizontal and vertical bar intersections form a grid-like reinforcement unit, improving the rack's bending stiffness under rapid acceleration / braking conditions.

[0048] 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 motorcycle rear rack, comprising a rear rack body (1), a load-bearing connecting plate (2), and a support frame (3), characterized in that, The rear tail frame body (1) has a laterally extended support platform (11) on the inner side of its rear end. The bearing connecting plate (2) is detachably fixed to the support platform (11) by fasteners (4). The support frame (3) includes a main body connecting part (31) and a longitudinal support part (32). The main body connecting part (31) is fixed to the lower surface of the front end of the rear tail frame body (1). The longitudinal support part (32) extends from the main body connecting part (31) toward the vehicle body installation direction. The longitudinal support part (32) forms at least one rigid connection point with the lower surface of the rear end of the rear tail frame body (1) through a support rod (33).

2. The motorcycle rear rack according to claim 1, characterized in that, The surface of the bearing connecting plate (2) is provided with several strip-shaped fixing holes (21), and the tail of the bearing connecting plate (2) is provided with a notch (22) that cooperates with the rear tail frame body to form a binding hole (22a).

3. A motorcycle rear rack according to claim 2, characterized in that, The fastener is a bolt assembly that passes through the bearing connecting plate (2) and the support platform (11). A plurality of first fixing holes (24) are provided along the edge of the bearing connecting plate, and a second fixing hole (111) corresponding to the first fixing hole (24) is provided on the support platform (11).

4. A motorcycle rear rack according to claim 1, characterized in that, The longitudinal support part (32) of the support frame (3) and the rear tail frame body (1) form a triangular rigid connection structure through the support rod (33). The two ends of the support rod (33) are respectively welded to the end of the longitudinal support part (32) and the lower surface of the rear tail frame body (1).

5. A motorcycle rear rack according to claim 2, characterized in that, The front end of the bearing connecting plate (2) is provided with a downwardly bent guide part (23), and its bending angle α is 15°-45°.

6. A motorcycle rear rack according to claim 1, characterized in that, The rear tail frame body (1) has symmetrical mounting plates (12) on the inner side of the front end. The mounting plates (12) have a first mounting hole (121) for connecting with the motorcycle frame. The longitudinal support part (32) has a mounting ear (34) with a second mounting hole (341) at its end.

7. A motorcycle rear rack according to any one of claims 1-6, characterized in that, The rear tail frame body (1) is provided with symmetrical handrails (6) at the front end. The handrails (6) and the rear tail frame body (1) are integrally formed by welding or fixed by bolts.

8. A motorcycle rear rack according to any one of claims 1-6, characterized in that, The lower surfaces of the rear tail frame body (1) and the body connection part (31) are both provided with rope hooks (5).

9. A motorcycle rear rack according to any one of claims 1-6, characterized in that, The configuration of the support rod (33) is one of two parallel straight rods, an A-shaped rod that intersects at the top, a three-pronged Y-shaped rod, or an H-shaped frame with a combination of horizontal and vertical lines.

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