Dustproof cover for flywheel of bicycle

Abstract

The invention belongs to the technical field of bicycles, particularly relates to a bicycle flywheel dust cover, and aims to solve the problems of poor adaptability and difficulty in disassembly and maintenance caused by structure immobilization in the background technology, the bicycle flywheel dust cover comprises a flywheel protection cover, the flywheel protection cover comprises an outer ring and an inner ring, the outer ring is located outside the inner ring, and the inner ring is located outside the outer ring. The inner diameter of the outer ring is larger than the outer diameter of the inner ring, a mud blocking assembly is connected between the outer ring and the inner ring in a sliding mode, and easy-to-disassemble assemblies distributed at equal intervals are arranged on the outer wall of the periphery of the outer ring. Through the innovative design of the mud blocking assembly and the annular sliding structure, the dynamic performance of the dustproof cover is remarkably improved, the three-splicing-block layout of the easy-to-disassemble assembly is in interference fit with the rubber clamping blocks, rapid disassembly and assembly of the dustproof cover are achieved, the double-layer structure of the outer ring and the inner ring achieves radial limiting through the rear baffle, and the dustproof cover is convenient to disassemble and assemble. The inner and outer diameter difference of the rear baffle is larger than that of the annular gap, so that silt is effectively prevented from invading from the gap.

Description

Technical Field

[0001] The present invention relates to the technical field of bicycles, in particular to a bicycle flywheel dust cover. Background Art

[0002] As a core component of the transmission system, the bicycle flywheel is exposed to the external environment for a long time and is easily corroded by pollutants such as mud, rain, and dust. Long-term contamination of the precision gears and chain inside the flywheel can lead to increased wear, reduced transmission efficiency, and even cause problems such as jamming and abnormal noise, seriously affecting the riding experience and the service life of the vehicle. Therefore, as an important protective component, the flywheel dust cover's core function is to effectively prevent external pollutants from invading the flywheel area through physical isolation and structural design, while also taking into account comprehensive performance such as drainage, ease of maintenance, and stability. Traditional dust covers mostly use a fixed cover structure. Although it can achieve dust protection to a certain extent, it still has many limitations in actual application and cannot meet the needs of use under complex road conditions.

[0003] In the prior art, the design of bicycle flywheel dust covers generally has the following deficiencies:

[0004] First, the rigid structure leads to poor adaptability. Most dust covers are integrally molded or rigidly attached, making them inflexible to flywheel size or spoke layout. Installation requires strict alignment with specific vehicle models, resulting in limited versatility. Second, drainage performance is insufficient. Traditional dust covers lack effective drainage channels, allowing rainwater and muddy water to easily accumulate inside the cover. Prolonged accumulation not only increases the risk of flywheel corrosion but can also cause deformation due to gravity. Third, disassembly and maintenance are difficult. Some dust covers are secured with bolts or clips, requiring specialized tools for removal. Repeated assembly and disassembly can easily wear the connectors, compromising sealing. Fourth, dynamic stability is poor. When riding on bumpy roads, relative displacement between the dust cover and flywheel can easily occur, causing unusual noises or loosening, and even potentially interfering with the flywheel's proper operation. Furthermore, existing technologies often lack integration between the fender assembly and the dust cover. The fender is often a separate component, making it difficult to provide synergistic protection with the dust cover. Once installed, it can create a visually redundant effect, detracting from the overall aesthetics of the vehicle. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a bicycle flywheel dust cover, which overcomes the deficiencies of the prior art and effectively solves the problems of poor adaptability and difficulty in disassembly and maintenance caused by fixed structure.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A bicycle flywheel dust cover comprises a flywheel protective cover, wherein the flywheel protective cover comprises an outer ring and an inner ring, wherein the outer ring is located outside the inner ring, and the inner diameter of the outer ring is larger than the outer diameter of the inner ring, a mudguard assembly is slidably connected between the outer ring and the inner ring, and equidistantly distributed easily removable components are provided on the peripheral outer wall of the outer ring, and the mudguard assembly comprises an arc-shaped cover, an arc-shaped mudguard, a conical drain outlet, a docking strip and a sphere, wherein the docking strip is slidably connected between the outer ring and the inner ring, the arc-shaped cover is fixedly connected to one side outer wall of the docking strip, the arc-shaped mudguard is provided at the bottom of one side outer wall of the arc-shaped cover, the conical drain outlets distributed at equal distances are opened on the arc surface of the bottom outer wall of the arc-shaped mudguard, and the sphere is slidably connected to the outer wall of the docking strip.

[0008] Through the above solution, the outer ring and the inner ring are injection molded with high-strength nylon composite materials. The inner diameter of the outer ring is 1.5-2mm larger than the outer diameter of the inner ring, forming an annular sliding gap. The depth of the annular ball groove is 2 / 3 of the diameter of the sphere, and the groove wall of the annular ball groove is polished to reduce the friction coefficient. During assembly, the docking strip of the mudguard assembly is embedded in the annular gap, and the sphere part protrudes and snaps into the annular ball groove to achieve 360° free sliding. The arc cover and the docking strip are fixed by ultrasonic welding. The arc of the arc-shaped mudguard is 15°-20°, and three conical drain ports are evenly distributed on the arc surface at the bottom. The inner diameter of the conical drain port is reduced from 3mm to 1mm from the outside to the inside. The sphere is made of stainless steel with a chrome-plated surface. A polytetrafluoroethylene bushing is embedded in the positioning hole to ensure smooth rotation and wear resistance of the sphere.

[0009] The innovative design of the mudguard assembly and annular sliding structure significantly enhances the dynamic performance of the dust cover. The curved mudguard and tapered drain port within the mudguard assembly automatically adjust their angle to suit road conditions during riding. The curved mudguard's sliding ball within the annular groove ensures it remains at its lowest position, precisely fitting the outer edge of the pulley's base. The tapered drain port features a tapered design that relies on gravity to control water flow, preventing water accumulation and reducing overall weight. This design not only prevents sediment from contaminating the pulley but also adapts to drainage requirements at varying riding speeds, effectively reducing the risk of pulley corrosion. Its dynamic adaptability and effective drainage enhance environmental adaptability.

[0010] As a further solution of the present invention, the top outer wall and the bottom outer wall of the docking strip are both provided with positioning holes distributed at equal distances, and the balls are rotatably connected to the inner walls of the positioning holes.

[0011] Through the above solution, the cooperation between the annular ball groove and the positioning hole enables the mudguard assembly to maintain uniform force during the sliding process, and the rolling friction characteristics of the ball further reduce wear and ensure the structural stability of long-term use.

[0012] As a further solution of the present invention, the easily detachable component includes a splicing block, a spoke positioning sleeve, a rubber clamp block and a side strip, wherein there are three splicing blocks, and the three splicing blocks are distributed around the outer ring, the spoke positioning sleeve is fixedly connected to the outer wall on one side of the splicing block, the rubber clamp block includes two, and the two rubber clamp blocks are fixedly connected to the top outer wall of the splicing block, and the side strips are arranged on the outer walls on both sides of the splicing block.

[0013] The above solution utilizes a split-piece design, with each piece measuring 1 / 12 the outer ring's circumference. During installation, the side bars are pushed along the guide grooves until they reach the limit. The rubber clips are then squeezed and deformed into the grooves, with an interference fit of 0.2-0.3mm. A 2mm-wide notch is created in the inner wall of the spoke positioning sleeves. During installation, the spokes are pressed into the notch at a 30° angle, achieving a tight fit through elastic deformation.

[0014] As a further solution of the present invention, an annular ball groove is provided on the inner wall of the outer ring and the outer wall of the inner ring, and the ball is slidably connected to the inner wall of the annular ball groove.

[0015] Through the above solution, the curved fender can be controlled to always be at the lowest point by the sliding of the ball in the annular ball groove, and accurately fit the bottom outer edge of the tower pulley.

[0016] As a further solution of the present invention, a rear baffle is fixedly connected to the outer wall of one side of the flywheel protection cover, and the rear baffle is located on the outer wall of one side of the outer ring and the inner ring, an annular gap is provided between the outer ring and the inner ring, and the inner and outer diameter difference of the rear baffle is greater than the inner and outer diameter difference of the annular gap.

[0017] With the above solution, the dividing groove 5 is 2mm deep and 1.5mm wide, extending continuously along the outer ring 11, inner ring 12, and the bottom of the rear baffle 4. The dividing groove 5 corresponding to the lowest splicing block 31 extends to the edge of the rear baffle 4, making it easier to unfold the outer ring 11, inner ring 12, and rear baffle 4, reducing the difficulty of overall assembly.

[0018] As a further solution of the present invention, the bottoms of the outer walls of the outer ring and inner ring and the bottom of the outer wall of the rear baffle are all provided with dividing grooves, and the dividing grooves are located directly above one of the lowest splicing blocks.

[0019] As a further solution of the present invention, the outer wall of the outer ring is provided with splicing grooves distributed at equal distances, and the splicing block is located on the inner wall of the splicing groove. A symmetrically distributed card groove is provided on the outer wall of one side of the splicing groove, and the rubber card block is tightly attached to the inner wall of the card groove, and the rubber card block and the card groove are in interference fit.

[0020] As a further solution of the present invention, sliding grooves are provided on the inner walls on both sides of the splicing groove, and the side strips are slidably connected to the inner walls of the sliding grooves.

[0021] As a further solution of the present invention, a wheel axle is provided through the inner wall of the inner ring and the rear fender, and a step pulley is installed on one side of the outer wall of the wheel axle.

[0022] As a further solution of the present invention, a spoke connecting plate is installed on the other side of the outer wall of the wheel axle, and adjacent spokes are fixedly connected to the peripheral outer wall of the spoke connecting plate, and the spokes are arranged on the inner wall of the spoke positioning sleeve, and the outer wall of the spoke positioning sleeve is provided with symmetrically distributed notches, and the width of the notches is smaller than the outer diameter of the spokes.

[0023] Through the above solution, the wheel axle passes through the inner ring and the rear fender, the shaft end of the wheel axle is connected to the step pulley and the spoke connecting plate through threads, and the torque transmission surface is coated with anti-loosening glue to ensure the connection stability under dynamic load.

[0024] The beneficial effects of the present invention are:

[0025] 1. The bicycle flywheel dust cover of the present invention significantly improves the dynamic performance of the dust cover through the innovative design of the mud guard assembly and the annular sliding structure. The cooperation between the arc-shaped mud guard and the conical drain port in the mud guard assembly can automatically adjust the angle according to the road conditions during riding: the arc-shaped mud guard can be controlled to always be at the lowest point through the sliding of the ball in the annular ball groove, accurately fitting the outer edge of the bottom of the tower wheel; the conical drain port adopts a tapered design, relying on gravity to control the discharge of water, avoiding water accumulation and reducing the overall weight. This design can not only prevent sediment from contaminating the tower wheel, but also adapt to the drainage needs at different riding speeds, effectively reduce the risk of tower wheel corrosion, and has dynamic adaptation and effective drainage, which can improve environmental adaptability;

[0026] 2. The bicycle flywheel dust cover of the present invention has an interference fit between the layout of the three splicing blocks of the easily detachable assembly and the rubber clamping block, which enables the quick disassembly and assembly of the dust cover. The splicing blocks are precisely positioned by the guiding action of the side bars and the slide grooves, and the rubber clamping blocks are self-locking after being embedded in the slots, and can be fixed without additional tools. During disassembly, only slight force is required to separate the splicing blocks, which significantly reduces the difficulty of maintenance. At the same time, the spoke positioning sleeve adopts a notch design, the width of which is smaller than the outer diameter of the spoke, to ensure that the spokes can be elastically embedded and firmly clamped during installation, avoiding displacement caused by riding vibration, taking into account both convenience and reliability, and adopting a modular and easy-to-detach structure, which is conducive to improving maintenance efficiency;

[0027] 3. The bicycle flywheel dust cover of the present invention has a double-layer structure of an outer ring and an inner ring, which is radially limited by a rear baffle. The difference between the inner and outer diameters of the rear baffle is greater than the design of the annular gap, which effectively prevents mud and sand from invading from the gap. The dividing groove is located directly above the splicing block, which can facilitate the unfolding of the outer ring, inner ring and rear baffle, reducing the difficulty of overall assembly. In addition, the cooperation between the annular ball groove and the positioning hole enables the mud guard assembly to maintain uniform force during the sliding process, and the rolling friction characteristics of the sphere further reduce wear and ensure the structural stability for long-term use. The overall design forms a three-dimensional protective network through the synergistic effect of multiple components, greatly extending the service life of the tower pulley and the dust cover itself, and has the functions of synergistic protection and structural reinforcement, which can extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a front view of the overall structure of a bicycle flywheel dust cover proposed by the present invention;

[0029] Figure 2 This is a rear view of the overall structure of a bicycle flywheel dust cover proposed by the present invention;

[0030] Figure 3 A front view of the connection structure between the flywheel protection cover and the mudguard assembly of a bicycle flywheel dust cover proposed by the present invention;

[0031] Figure 4 This is a rear view of the connection structure between the flywheel protection cover and the mud guard assembly of a bicycle flywheel dust cover proposed by the present invention;

[0032] Figure 5 This is a schematic diagram of the overall structure of a bicycle flywheel dust cover proposed by the present invention;

[0033] Figure 6 This is a schematic structural diagram of a mud guard assembly of a bicycle flywheel dust cover proposed by the present invention;

[0034] Figure 7 This is a schematic structural diagram of a bicycle flywheel dust cover proposed by the present invention when the conical drain port and the sphere are separated;

[0035] Figure 8 This is a schematic structural diagram of an easily detachable component of a bicycle flywheel dust cover proposed by the present invention;

[0036] Figure 9 This is a schematic structural diagram of a bicycle flywheel dust cover proposed by the present invention when the flywheel protection cover is separated from one of the easily detachable components;

[0037] Figure 10 This is an enlarged schematic diagram of the structure of part A of a bicycle flywheel dust cover proposed by the present invention.

[0038] In the figure: 1. Flywheel protection cover; 11. Outer ring; 12. Inner ring; 2. Mud guard assembly; 21. Arc cover; 22. Arc mud guard; 23. Conical drain port; 24. Docking strip; 25. Sphere; 26. Positioning hole; 3. Easily removable assembly; 31. Splicing block; 32. Spoke positioning sleeve; 33. Rubber clamp; 34. Side strip; 4. Rear baffle; 5. Breaking groove; 6. Annular ball groove; 7. Clamping groove; 8. Slide groove; 9. Wheel axle; 10. Tower pulley; 13. Spoke connecting plate; 14. Spoke. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] Reference Figures 1-10 , Embodiment 1, a bicycle flywheel dust cover includes a flywheel protective cover 1, wherein the flywheel protective cover 1 includes an outer ring 11 and an inner ring 12, wherein the outer ring 11 is located outside the inner ring 12, and the inner diameter of the outer ring 11 is larger than the outer diameter of the inner ring 12, and a mudguard assembly 2 is slidably connected between the outer ring 11 and the inner ring 12, and an easily removable assembly 3 distributed at equal distances is provided on the outer wall of the periphery of the outer ring 11, and the easily removable assembly 3 includes a splicing block 31, a spoke positioning sleeve 32, a rubber clamping block 33 and a side strip 34, wherein the splicing block 31 includes three, and the three splicing blocks 31 are distributed around the periphery of the outer ring 11, the spoke positioning sleeve 32 is fixedly connected to the outer wall of one side of the splicing block 31, the rubber clamping block 33 includes two, and the two rubber clamping blocks 33 are fixedly connected to the top outer wall of the splicing block 31, and the side strips 34 are provided on the outer walls of both sides of the splicing block 31.

[0041] The splicing blocks 31 are split, each measuring 1 / 12 the circumference of the outer ring 11. During installation, the side bars 34 are pushed along the slide grooves 8 until they reach the stop. The rubber clamps 33 are squeezed and deformed, then inserted into the slots 7 with an interference fit of 0.2-0.3mm. A 2mm-wide notch is defined in the inner wall of the spoke positioning sleeves 32. During installation, the spokes 14 are pressed into the notch at a 30° angle, achieving a tight fit through elastic deformation.

[0042] In this embodiment, the three splicing blocks 31 of the easily removable component 3 are arranged in an interference fit with the rubber clamping block 33, enabling quick disassembly and assembly of the dust cover. The splicing block 31 is precisely positioned through the guiding effect of the side strips 34 and the slide groove 8. The rubber clamping block 33 is self-locking after being inserted into the clamping groove 7, and can be fixed without additional tools. During disassembly, only slight force is required to separate the splicing block 31, significantly reducing the difficulty of maintenance. At the same time, the spoke positioning sleeve 32 adopts a notch design, and its width is smaller than the outer diameter of the spoke 14, ensuring that the spoke 14 can be elastically embedded and firmly clamped during installation, avoiding displacement caused by riding vibration, taking into account convenience and reliability, and adopting a modular and easy-to-disassemble structure, which is conducive to improving maintenance efficiency.

[0043] In the second embodiment, the mudguard assembly 2 includes an arc-shaped cover 21, an arc-shaped mudguard 22, a conical drain port 23, a docking strip 24 and a sphere 25, wherein the docking strip 24 is slidably connected between the outer ring 11 and the inner ring 12, the arc-shaped cover 21 is fixedly connected to the outer wall of one side of the docking strip 24, the arc-shaped mudguard 22 is arranged at the bottom of the outer wall of one side of the arc-shaped cover 21, and the conical drain ports 23 distributed at equal distances are opened on the arc surface of the bottom outer wall of the arc-shaped mudguard 22, the sphere 25 is slidably connected to the outer wall of the docking strip 24, the top outer wall and the bottom outer wall of the docking strip 24 are both provided with positioning holes 26 distributed at equal distances, and the sphere 25 is rotatably connected to the inner wall of the positioning hole 26, the inner wall of the outer ring 11 and the outer wall of the inner ring 12 are both provided with an annular ball groove 6, and the sphere 25 is slidably connected to the inner wall of the annular ball groove 6.

[0044] The outer ring 11 and the inner ring 12 are injection molded from a high-strength nylon composite material. The inner diameter of the outer ring 11 is 1.5-2mm larger than the outer diameter of the inner ring 12, forming an annular sliding gap. The depth of the annular ball groove 6 is 2 / 3 of the diameter of the sphere 25, and the groove wall of the annular ball groove 6 is polished to reduce the friction coefficient. During assembly, the docking strip 24 of the mud guard assembly 2 is embedded in the annular gap, and the sphere 25 partially protrudes and snaps into the annular ball groove 6, achieving 360° free sliding. The arc cover 21 and the docking strip 24 are fixed by ultrasonic welding. The arc of the arc-shaped mud guard 22 is 15°-20°, and three conical drain ports 23 are evenly distributed on its bottom arc surface. The inner diameter of the conical drain port 23 decreases from 3mm to 1mm from the outside to the inside. The sphere 25 is made of stainless steel with a chrome-plated surface. The positioning hole 26 is embedded with a polytetrafluoroethylene bushing to ensure that the sphere 25 rotates smoothly and is wear-resistant.

[0045] In this embodiment, the dynamic performance of the dust cover is significantly improved through the innovative design of the mudguard assembly 2 and the annular sliding structure. The combination of the curved mudguard 22 and the conical drain outlet 23 in the mudguard assembly 2 can automatically adjust the angle according to road conditions during riding: the curved mudguard 22 can be controlled to always be at the lowest point through the sliding of the ball 25 in the annular ball groove 6, accurately fitting the bottom outer edge of the tower pulley 10; the conical drain outlet 23 adopts a tapered design, relying on gravity to control the discharge of water, avoid water accumulation, and reduce the overall weight. This design not only prevents mud and sand from contaminating the tower pulley 10, but also adapts to the drainage needs at different riding speeds, effectively reducing the risk of corrosion of the tower pulley 10, and has dynamic adaptability and effective drainage, which can improve environmental adaptability.

[0046] In embodiment three, a rear baffle 4 is fixedly connected to the outer wall of one side of the flywheel protection cover 1, and the rear baffle 4 is located on the outer wall of one side of the outer ring 11 and the inner ring 12. An annular gap is provided between the outer ring 11 and the inner ring 12, and the inner and outer diameter difference of the rear baffle 4 is greater than the inner and outer diameter difference of the annular gap.

[0047] In this embodiment, the rear baffle 4 is fixed to the flywheel protective cover 1 through a hot melt process. The difference between the inner and outer diameters is 3 mm, completely covering the annular gap. The double-layer structure of the outer ring 11 and the inner ring 12 is radially limited by the rear baffle 4. The difference between the inner and outer diameters of the rear baffle 4 is greater than the design of the annular gap, which effectively prevents mud and sand from invading from the gap. The dividing groove 5 is located directly above the splicing block 31, which can facilitate the unfolding of the outer ring 11, the inner ring 12 and the rear baffle 4, reducing the difficulty of overall assembly. In addition, the cooperation between the annular ball groove 6 and the positioning hole 26 enables the mud guard assembly 2 to maintain uniform force during the sliding process, and the rolling friction characteristics of the ball 25 further reduce wear and ensure the structural stability of long-term use. The overall design forms a three-dimensional protective network through the synergistic effect of multiple components, greatly extending the service life of the tower wheel 10 and the dust cover itself, and has the effect of synergistic protection and structural reinforcement, which can extend the service life.

[0048] The bottom of the outer wall of the outer ring 11 and the inner ring 12 and the bottom of the outer wall of the rear baffle 4 are all provided with a dividing groove 5, and the dividing groove 5 is located just above one of the lowest splicing blocks 31.

[0049] The dividing groove 5 is 2mm deep and 1.5mm wide, and is continuously formed along the outer ring 11, the inner ring 12, and the bottom of the rear baffle 4. The dividing groove 5 corresponding to the lowest splicing block 31 extends to the edge of the rear baffle 4, making it easier to unfold the outer ring 11, the inner ring 12, and the rear baffle 4, reducing the difficulty of overall assembly.

[0050] The outer wall of the outer ring 11 is provided with equidistantly distributed splicing grooves, and the splicing block 31 is located on the inner wall of the splicing groove. A symmetrically distributed card groove 7 is provided on the outer wall of one side of the splicing groove, and the rubber card block 33 is tightly attached to the inner wall of the card groove 7, and the rubber card block 33 and the card groove 7 are in interference fit.

[0051] Slide grooves 8 are formed on the inner walls of both sides of the splicing groove, and the side strips 34 are slidably connected to the inner walls of the slide grooves 8 .

[0052] The wheel axle 9 is provided through the inner wall of the inner ring 12 and the rear fender 4, and a step pulley 10 is installed on one side of the outer wall of the wheel axle 9, and a spoke connecting plate 13 is installed on the other side of the outer wall of the wheel axle 9, and the spoke connecting plate 13 is fixedly connected to the peripheral outer wall of the spoke connecting plate 13 with adjacent spokes 14, and the spokes 14 are provided through the inner wall of the spoke positioning sleeve 32, and the outer wall of the spoke positioning sleeve 32 is provided with symmetrically distributed notches, and the width of the notches is smaller than the outer diameter of the spokes 14.

[0053] The wheel axle 9 passes through the inner ring 12 and the rear fender 4. The end of the wheel axle 9 is connected to the step pulley 10 and the spoke connecting plate 13 through threads. The torque transmission surface is coated with anti-loosening glue to ensure the connection stability under dynamic load.

[0054] Working principle:

[0055] 1. Dynamic protection stage

[0056] During riding, the outer ring 11 and inner ring 12 of the flywheel protective cover 1 are rigidly connected to the frame via the spoke positioning sleeves 32 connected to the spokes 14. The ball 25 of the mud guard assembly 2 rolls freely within the annular ball groove 6, so that the curved mud guard 22 is always located at the bottom of the pulley 10. When the wheel rolls over mud and water, it prevents mud and sand from impacting the pulley 10, and the curved cover 21 directs most of the splashing material to the outside.

[0057] 2. Drainage and self-cleaning stage

[0058] The tapered structure of the conical drain outlet 23 creates a Venturi effect, increasing the flow rate as water passes through it. Rainwater is collected at the wide end of the conical drain outlet 23 and flows out the narrow end. The dividing groove 5 facilitates the unfolding of the outer ring 11, inner ring 12, and rear baffle 4, reducing the difficulty of overall assembly. The overlapping design of the rear baffle 4 and the flywheel protective cover 1 further blocks contaminants from splashing from the rear.

[0059] 3. Structural adaptation and maintenance stage

[0060] On bumpy roads, the mudguard assembly 2 counteracts lateral impact forces through the rolling motion of the spheres 25, preventing structural damage from hard collisions. To clean or replace components, press the rubber block 33 to disengage it from the slot 7, then pull the splicing block 31 along the guide groove 8 to separate the easily removable assembly 3, exposing the spokes 14 and step pulley 10 for maintenance. During reinstallation, the guide strips 34 of the splicing block 31 ensure precise alignment, and the rubber block 33 returns to its original position to form a sealed barrier.

[0061] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A bicycle flywheel dust cover, comprising a flywheel protective cover (1), characterized in that: The flywheel protection cover (1) comprises an outer ring (11) and an inner ring (12), wherein the outer ring (11) is located outside the inner ring (12), and the inner diameter of the outer ring (11) is larger than the outer diameter of the inner ring (12), a mud guard assembly (2) is slidably connected between the outer ring (11) and the inner ring (12), and equidistantly distributed easily removable assemblies (3) are provided on the peripheral outer wall of the outer ring (11), and the mud guard assembly (2) comprises an arc-shaped cover (21), an arc-shaped mud guard (22), a conical drain port (23), a docking strip (24) and a sphere (25), wherein the docking strip (24) is slidably connected between the outer ring (11) and the inner ring (12), the arc cover (21) is fixedly connected to the outer wall of one side of the docking strip (24), the arc fender (22) is arranged at the bottom of the outer wall of one side of the arc cover (21), and the conical drain ports (23) distributed at equal intervals are opened on the arc surface of the bottom outer wall of the arc fender (22), and the sphere (25) is slidably connected to the outer wall of the docking strip (24).

2. A bicycle flywheel dust cover according to claim 1, characterized in that: The top outer wall and the bottom outer wall of the docking strip (24) are both provided with positioning holes (26) distributed at equal distances, and the spheres (25) are rotatably connected to the inner walls of the positioning holes (26).

3. A bicycle flywheel dust cover according to claim 1, characterized in that: The easily detachable component (3) comprises a splicing block (31), a spoke positioning sleeve (32), a rubber clamping block (33) and a side strip (34), wherein the splicing block (31) comprises three splicing blocks (31), and the three splicing blocks (31) are distributed around the outer ring (11), the spoke positioning sleeve (32) is fixedly connected to an outer wall of one side of the splicing block (31), the rubber clamping block (33) comprises two, and both of the two rubber clamping blocks (33) are fixedly connected to the top outer wall of the splicing block (31), and the side strip (34) is arranged on the outer walls of both sides of the splicing block (31).

4. A bicycle flywheel dust cover according to claim 1, characterized in that: An annular ball groove (6) is provided on the inner wall of the outer ring (11) and the outer wall of the inner ring (12), and the ball (25) is slidably connected to the inner wall of the annular ball groove (6).

5. The bicycle flywheel dust cover according to claim 1, characterized in that: A rear baffle (4) is fixedly connected to an outer wall of one side of the flywheel protection cover (1), and the rear baffle (4) is located on an outer wall of one side of the outer ring (11) and the inner ring (12), an annular gap is provided between the outer ring (11) and the inner ring (12), and the difference between the inner and outer diameters of the rear baffle (4) is greater than the difference between the inner and outer diameters of the annular gap.

6. The bicycle flywheel dust cover according to claim 1, characterized in that: The bottoms of the outer walls of the outer ring (11) and the inner ring (12) and the bottom of the outer wall of the rear baffle (4) are all provided with a separating groove (5), and the separating groove (5) is located directly above one of the lowest splicing blocks (31).

7. The bicycle flywheel dust cover according to claim 1, characterized in that: The outer wall of the outer ring (11) is provided with splicing grooves distributed at equal distances, and the splicing block (31) is located on the inner wall of the splicing groove. A symmetrically distributed clamping groove (7) is provided on the outer wall of one side of the splicing groove, and the rubber clamping block (33) is tightly attached to the inner wall of the clamping groove (7), and the rubber clamping block (33) and the clamping groove (7) are in interference fit.

8. The bicycle flywheel dust cover according to claim 7, characterized in that: Slide grooves (8) are provided on the inner walls of both sides of the splicing groove, and the side strips (34) are slidably connected to the inner walls of the slide grooves (8).

9. The bicycle flywheel dust cover according to claim 1, characterized in that: A wheel axle (9) is provided through the inner wall of the inner ring (12) and the rear baffle (4), and a step pulley (10) is installed on one side of the outer wall of the wheel axle (9).

10. The bicycle flywheel dust cover according to claim 9, characterized in that: A spoke connecting plate (13) is installed on the other side of the outer wall of the wheel axle (9), and adjacently distributed spokes (14) are fixedly connected to the peripheral outer wall of the spoke connecting plate (13), and the spokes (14) are arranged on the inner wall of the spoke positioning sleeve (32). The outer wall of the spoke positioning sleeve (32) is provided with symmetrically distributed notches, and the width of the notches is smaller than the outer diameter of the spokes (14).

Images