Urban bicycle capable of reducing noise of chain

Abstract

The utility model provides an urban bicycle capable of reducing chain noise, which belongs to the technical field of bicycles and comprises a bicycle body unit, a bicycle frame, a seat cushion movably mounted at the top of the bicycle frame and a handlebar hinged to the top of the bicycle frame. And the protection unit comprises a closed chain cover fixedly mounted on the outer side of the frame. Rainwater and dust are effectively isolated through the closed chain cover, and friction abnormal sound generated when the chain operates is reduced; the oil storage box is matched with the lubricating cotton block, so that abrasion and corrosion of the chain are reduced through dynamic lubrication, and abnormal sound caused by insufficient long-term lubrication is avoided; the adjustable design of the bolt and the threaded seat ensures that the tensioning degree of the chain is stable, and mechanical noise generated by loosening is avoided; the detachable shell cover is convenient to clean and maintain, dirt accumulation is prevented from intensifying noise, the chain noise problem is radically solved from the four aspects of physical sound insulation, continuous lubrication, rust and corrosion prevention and mechanical stability, the riding comfort is remarkably improved, and interference to the urban sound environment is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of bicycles, specifically relating to a city bicycle that can reduce chain noise. Background Technology

[0002] Urban bicycles, also known as public bicycles or shared bicycles, are a convenient and environmentally friendly way to travel short distances, designed to solve the "last mile" problem of urban transportation. They originated in Europe in the 1960s and have gradually become popular around the world with urbanization and increased environmental awareness.

[0003] Currently, chain noise from urban bicycles has become a significant factor affecting the riding experience and the urban environment. After prolonged use, the chain, due to lack of lubrication, wear, or loosening, produces noticeable friction noise and abnormal sounds, causing discomfort to riders and potentially disrupting the quiet atmosphere of the streets. Furthermore, shared bicycles are frequently exposed to the outdoors, where rain and dust accelerate chain corrosion, further exacerbating the noise problem. Utility Model Content

[0004] The purpose of this invention is to provide a city bicycle that can reduce chain noise, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A city bicycle that reduces chain noise includes,

[0007] The vehicle body unit includes a frame, a seat movably mounted on top of the frame, and handlebars hinged to the top of the frame;

[0008] The protective unit includes a closed chain guard fixedly installed on the outside of the frame, a threaded seat fixedly installed on the outside of the closed chain guard, a bolt threaded on the outside of the threaded seat, a limiting piece movably sleeved on the outside of the bolt, and a plate fixedly installed on the outside of the limiting piece.

[0009] And a limiting lubrication unit used in conjunction with the protective unit.

[0010] As a preferred embodiment of this utility model, the protective unit further includes a fixing plate fixedly installed on the top of the plate, an oil storage box fixedly installed on the outside of the fixing plate, a vertical rod fixedly installed on the bottom of the plate, and a detachable shell cover that is movably locked on the outside of the closed chain cover.

[0011] As a preferred embodiment of this utility model, one end of the bolt passes through the limiting piece and is threadedly connected to the threaded seat. The oil storage box is used to store lubricating oil, and the top is equipped with an openable cover.

[0012] As a preferred embodiment of this utility model, the limiting lubrication unit includes a cylinder hinged to the outside of the vertical rod, a return spring fixedly installed in the inner cavity of the cylinder, a support plate fixedly installed at the end of the return spring, and a mounting groove formed on the outside of the support plate.

[0013] As a preferred embodiment of this utility model, the limiting lubrication unit further includes a groove shell that is movably engaged on the outside of the mounting groove, a lubricating cotton block that is movably engaged in the inner cavity of the groove shell, and a screw threaded into the inner cavity of the mounting groove.

[0014] In a preferred embodiment of this utility model, the screw passes through the support plate and one end is threadedly connected to the outer side of the groove shell.

[0015] As a preferred embodiment of the present invention, the vehicle body unit further includes wheels disposed on the front and rear sides of the bottom of the frame, foot pedals hinged to the outside of the frame, and a chain disposed in the inner cavity of the enclosed chain guard.

[0016] Compared with existing technologies, the beneficial effects of this utility model are as follows: the enclosed chain cover effectively isolates rainwater and dust and reduces friction noise during chain operation; the combination of the oil reservoir and lubrication pad reduces chain wear and corrosion through dynamic lubrication, solving the noise caused by long-term insufficient lubrication; the adjustable design of the bolts and threaded seats ensures stable chain tension and avoids mechanical noise caused by loosening; the detachable cover facilitates cleaning and maintenance, preventing dirt accumulation from aggravating noise. It fundamentally solves the chain noise problem from four aspects: physical sound insulation, continuous lubrication, rust and corrosion prevention, and mechanical stability, significantly improving riding comfort and reducing interference with the urban sound environment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the protective unit and the limiting lubrication unit of this utility model;

[0020] Figure 3 This is a schematic diagram of the overall structure of this utility model from another perspective;

[0021] Figure 4 For the present utility model Figure 3 Enlarged view of the structure at point A in the middle;

[0022] Figure 5 This is a partial cross-sectional view of the closed chain cover structure of this utility model.

[0023] In the picture:

[0024] 100. Body unit; 110. Frame; 120. Seat; 130. Handlebars; 140. Wheels; 150. Pedals; 160. Chain;

[0025] 200. Protective unit; 210. Enclosed chain guard; 220. Threaded seat; 230. Bolt; 240. Limiting plate; 250. Plate; 260. Fixing plate; 270. Oil reservoir; 280. Vertical rod; 290. Removable cover;

[0026] 300, Limiting lubrication unit; 310, cylinder; 320, return spring; 330, support plate; 340, mounting groove; 350, groove shell; 360, lubricating cotton block; 370, screw. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0030] Example

[0031] Reference Figures 1-5 This is an embodiment of the present invention, which provides a city bicycle that can reduce chain noise, comprising:

[0032] The vehicle body unit 100 includes a frame 110, a seat 120 movably mounted on top of the frame 110, and a handlebar 130 hinged to the top of the frame 110.

[0033] The protective unit 200 includes a closed chain guard 210 fixedly installed on the outside of the frame 110, a threaded seat 220 fixedly installed on the outside of the closed chain guard 210, a bolt 230 threaded on the outside of the threaded seat 220, a limiting piece 240 movably sleeved on the outside of the bolt 230, and a plate 250 fixedly installed on the outside of the limiting piece 240.

[0034] And, a limit lubrication unit 300 used in conjunction with the protection unit 200.

[0035] The combination of the vehicle body unit 100 and the protection unit 200 achieves enclosed noise reduction protection for the chain 160. The enclosed chain cover 210 effectively blocks the friction noise when the chain 160 is running. At the same time, the structural design of the threaded seat 220, bolt 230 and limit plate 240 makes the enclosed chain cover 210 adjustable and fixed, ensuring stability and adaptability. The introduction of the limit lubrication unit 300 further optimizes the lubrication method of the chain 160, structurally reducing the root cause of noise generation.

[0036] Specifically, the protective unit 200 also includes a fixing plate 260 fixedly installed on the top of the plate 250, an oil storage box 270 fixedly installed on the outside of the fixing plate 260, a vertical rod 280 fixedly installed on the bottom of the plate 250, and a detachable cover 290 movably locked on the outside of the enclosed chain cover 210.

[0037] The functionality of the protective unit 200 is enhanced by adding a fixed plate 260, an oil reservoir 270, and a removable cover 290. The oil reservoir 270 facilitates the storage of lubricating oil, providing convenience for subsequent lubrication. The removable cover 290 makes maintenance and cleaning more convenient, while the vertical rod 280 enhances the stability of the overall structure, ensuring precise coordination between the lubrication system and the chain 160.

[0038] Furthermore, one end of the bolt 230 passes through the limiting piece 240 and is threadedly connected to the threaded seat 220. The oil reservoir 270 is used to store lubricating oil, and the top movable clip is equipped with an openable cover.

[0039] The threaded connection design between the bolt 230 and the threaded seat 220 allows for flexible adjustment of the chain cover tension to adapt to different chain 160 tension states. The lubricating oil stored in the oil reservoir 270 can be conveniently replenished through the openable cover, which facilitates the removal and oiling of the lubricating cotton block 360, thereby indirectly reducing the friction noise of the chain 160.

[0040] Preferably, the limiting lubrication unit 300 includes a cylinder 310 hinged to the outside of the vertical rod 280, a return spring 320 fixedly installed in the inner cavity of the cylinder 310, a support plate 330 fixedly installed at the end of the return spring 320, and a mounting groove 340 opened on the outside of the support plate 330. The limiting lubrication unit 300 also includes a groove shell 350 movably locked on the outside of the mounting groove 340, a lubricating cotton block 360 movably locked in the inner cavity of the groove shell 350, and a screw 370 threadedly installed in the inner cavity of the mounting groove 340. The screw 370 passes through the support plate 330 and one end is threadedly connected to the outside of the groove shell 350.

[0041] The limiting lubrication unit 300, through the elastic cooperation between the cylinder 310 and the return spring 320, allows the support plate 330 to adapt to the movement state of the chain 160, maintaining stable contact between the lubricating cotton block 360 and the chain 160. The design of the mounting groove 340 facilitates the installation and replacement of the groove shell 350, ensuring a long-lasting and uniform lubrication effect. The lubricating cotton block 360 can be removed and immersed in the oil reservoir 270 to absorb lubricating oil, and then placed back into the groove shell 350. It continuously lubricates the surface of the chain 160 as it rotates, reducing friction noise. The threaded fixing method of the screw 370 makes the disassembly and assembly of the groove shell 350 more convenient, facilitating the maintenance or replacement of the lubricating cotton block 360 and improving the user's operational convenience. The screw 370 passes through the support plate 330 and is fixed to the groove shell 350, ensuring that the lubricating cotton block 360 will not fall off when the chain 160 moves, while allowing for quick disassembly to replenish lubricating oil.

[0042] Furthermore, the vehicle body unit 100 also includes wheels 140 located on the front and rear sides of the bottom of the frame 110, foot pedals 150 hinged to the outside of the frame 110, and a chain 160 located inside the enclosed chain guard 210.

[0043] The conventional structure of wheel 140, pedal 150 and chain 160, combined with protective unit 200 and lubrication unit 300, forms a complete low-noise riding system. The chain 160 operates within the enclosed chain guard 210, and with the continuous lubrication of lubricating cotton block 360, friction noise is significantly reduced, improving riding comfort and environmental friendliness.

[0044] When in use, while riding, the pedal 150 drives the chain 160 inside the enclosed chain cover 210 to rotate. The enclosed chain cover 210 blocks most of the mechanical noise. At the same time, the return spring 320 of the limit lubrication unit 300 pushes the support plate 330, so that the lubricating cotton block 360 in the groove shell 350 always adheres to the surface of the chain 160 and the enclosed chain cover 210, continuously releasing the lubricating oil absorbed by the oil storage box 270 to reduce friction noise.

[0045] When maintenance is required, the lubricating cotton block can be removed by loosening screw 370 and soaked in oil, or the removable cover 290 can be disassembled to clean the inside. The adjustment structure of bolt 230 and threaded seat 220 ensures that the enclosed chain cover is always in the best noise reduction state.

[0046] In summary, the enclosed chain guard 210 physically isolates the operating noise of the chain 160, while the adjustable threaded seat 220 and bolt 230 structure ensure the stable fit of the chain guard. The lubricating cotton block 360, through the convenient oil reservoir 270, continuously lubricates the surface of the chain 160 under the elastic support of the return spring 320, significantly reducing friction noise. The detachable cover 290 and modular slotted shell 350 design simplifies the maintenance process, and the hinge between the vertical rod 280 and the cylinder 310 enhances the system's dynamic adaptability to the movement of the chain 160. This allows the bicycle to maintain traditional riding functions while significantly improving environmental quietness and riding comfort, making it especially suitable for high-frequency use scenarios of shared bicycles.

[0047] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0048] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0049] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A city bicycle capable of reducing chain noise, characterized in that: The utility model relates to a chain guard device for bicycle, which comprises a vehicle body unit (100), a protection unit (200) and a limiting lubrication unit (300). The vehicle body unit (100) comprises a frame (110), a seat cushion (120) movably mounted on the top of the frame (110), and a handlebar (130) hingedly mounted on the top of the frame (110). The protection unit (200) comprises a closed chain cover (210) fixedly mounted on the outside of the frame (110), a threaded seat (220) fixedly mounted on the outside of the closed chain cover (210), a bolt (230) threadedly mounted on the outside of the threaded seat (220), a limiting sheet (240) movably sleeved on the outside of the bolt (230), and a plate body (250) fixedly mounted on the outside of the limiting sheet (240). The limiting lubrication unit (300) is used in cooperation with the protection unit (200).

2. The urban bicycle with reduced chain noise according to claim 1, characterized in that: The protection unit (200) further comprises a fixed plate (260) fixedly mounted on the top of the plate body (250), an oil storage box (270) fixedly mounted on the outside of the fixed plate (260), a vertical rod (280) fixedly mounted on the bottom of the plate body (250), and a detachable shell cover (290) movably clamped on the outside of the closed chain cover (210).

3. The urban bicycle with reduced chain noise according to claim 2, characterized in that: One end of the bolt (230) penetrates through the limiting sheet (240) and is threadedly connected with the threaded seat (220), the inside of the oil storage box (270) is used for storing lubricating oil, and the top movably clamps an open-close box cover.

4. The city bicycle of claim 3, wherein: The limiting lubrication unit (300) comprises a cylinder body (310) hingedly connected with the outside of the vertical rod (280), a return spring (320) fixedly mounted in the inner cavity of the cylinder body (310), a support plate (330) fixedly mounted on the end of the return spring (320), and a mounting groove (340) formed on the outside of the support plate (330).

5. The urban bicycle with reduced chain noise according to claim 4, characterized in that: The limiting lubrication unit (300) further comprises a groove shell (350) movably clamped on the outside of the mounting groove (340), a lubricating cotton block (360) movably clamped in the inner cavity of the groove shell (350), and a screw (370) threadedly mounted in the inner cavity of the mounting groove (340).

6. A city bike with reduced chain noise according to claim 5, characterized in that: The screw (370) penetrates through the support plate (330) and is threadedly connected with the outside of the groove shell (350) at one end.

7. A city bike with reduced chain noise according to claim 6, characterized in that: The vehicle body unit (100) further comprises wheels (140) arranged on the front and rear sides of the bottom of the frame (110), a foot pedal (150) hingedly connected with the outside of the frame (110), and a chain (160) arranged in the inner cavity of the closed chain cover (210).

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