A carbon fiber bicycle chain tension adjustment device

By using the coordinated operation of the telescopic rod, cylinder, and pinion, the problems of complex structure, cumbersome installation, high noise, and high failure rate of existing chain tensioning devices on carbon fiber bicycles are solved. This achieves efficient, stable, and precise chain adjustment, improving riding safety and smoothness.

CN224589309UActive Publication Date: 2026-08-04DONGGUAN MINGKE CARBON FIBER TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
DONGGUAN MINGKE CARBON FIBER TECH CO LTD
Filing Date
2025-09-11
Publication Date
2026-08-04

AI Technical Summary

Technical Problem

Existing chain tensioning devices on carbon fiber bicycles are complex in structure, cumbersome to install, costly, noisy, and have a high failure rate. They also cannot achieve effective chain tension adjustment, affecting riding smoothness and safety.

Method used

The chain employs a telescopic rod, a cylinder, and a pinion working in tandem. The telescopic rod allows for flexible length adjustment, the cylinder provides stable support and transmits force, and the pinion enables precise fine-tuning. Combined with control and detection devices, this achieves efficient, stable, and precise tension adjustment of the chain.

Benefits of technology

It achieves efficient, stable, and precise chain tension adjustment, improving riding safety and smoothness, reducing failure rate and noise, and enhancing user experience.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to chain tension adjusting technical field, and disclose a kind of carbon fiber bicycle chain tension adjusting device, including the inside fixed with telescopic rod two of the left and right sides of fixed long plate, the lower end of telescopic rod two is slidably equipped with telescopic rod one, the lower end surface of telescopic rod one is fixedly equipped with cylinder, the outside of cylinder is rotatably equipped with small tooth disc, by telescopic rod, cylinder and small tooth disc, utilize telescopic rod and can be flexibly adjusted length to adapt to different chain tension demand, cylinder can stably support and transmit power, pinion can realize accurate fine adjustment, three synergistic work, can efficiently, stably and accurately push chain down, achieve the purpose of chain tension adjusting.
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Description

Technical Field

[0001] This utility model belongs to the field of chain tension adjustment technology, specifically a carbon fiber bicycle chain tension adjustment device. Background Technology

[0002] Some chain tensioning devices use screws and nuts to adjust the position of the guide wheel, but they have drawbacks such as complex structure, complicated installation, high production cost, high noise, high failure rate and inconvenient maintenance. These problems may be amplified on carbon fiber bicycles, affecting the overall performance and user experience.

[0003] Meanwhile, a bicycle automatic tensioning device with announcement number CN215663845U is disclosed. The device is located on the outside of the chain and includes a tensioning wheel, a pressure sensor, and a controller. The tensioning wheel engages with the chain and is connected to a tensioning sleeve. The pressure sensor detects the force of the chain on the tensioning wheel, and the controller is used to control the movement of the tensioning wheel according to the pressure feedback from the chain.

[0004] The aforementioned automatic bicycle tensioning device can effectively prevent and avoid bicycle chain slippage through automatic spring adjustment and manual control, reducing the injury to riders caused by sudden chain slippage and minimizing wasted time. However, it cannot achieve tension adjustment, which makes the chain prone to slippage, affecting the smoothness and safety of riding. It may also worsen the fit between the chain and sprocket, increase wear, and reduce the service life of the chain and sprocket. In addition, it may generate abnormal noise during riding, affecting the riding experience.

[0005] Therefore, a carbon fiber bicycle chain tension adjustment device is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a carbon fiber bicycle chain tension adjustment device. It features a telescopic rod that can flexibly adjust its length to adapt to different chain tension requirements, a cylinder that can stably support and transmit force, and a pinion gear that can achieve precise fine-tuning. The three components work together to efficiently, stably, and accurately push the chain downwards to achieve the purpose of chain tension adjustment.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a carbon fiber bicycle chain tension adjustment device, comprising a telescopic rod two fixedly arranged inside the left and right sides of the fixed long plate, a telescopic rod one slidably arranged at the lower end of the telescopic rod two, a cylinder fixedly arranged at the lower end face of the telescopic rod one, and a small chainring rotatably arranged on the outer side of the cylinder.

[0008] Preferably, the front end of the fixed long plate is provided with column grooves on both the left and right sides, and a column is rotatably provided inside the column groove.

[0009] By adopting the above technical solution, a stable installation position is provided for the column, ensuring that the column can be firmly fixed on the fixed long plate, providing reliable support for the installation and operation of subsequent related components.

[0010] Preferably, a control device is fixedly provided in the middle of the upper end surface of the fixed long plate, and the control device is attached to the telescopic rod 2. A wireless receiving module is fixedly provided in the middle of the upper end of the control device.

[0011] By adopting the above technical solution, the control device can effectively control the telescopic pole two, while the wireless receiving module can receive external wireless signals to realize remote control of the device, thus improving the convenience of using the device.

[0012] Preferably, the upper end face of the fixed long plate is provided with inner grooves on both the left and right sides, and the telescopic rod two is fixed inside the inner grooves.

[0013] By adopting the above technical solution, the inner groove provides a hidden installation space for the second telescopic rod, which not only ensures the stability of the installation of the second telescopic rod, but also reduces its occupation of the external space of the fixed long plate, making the overall structure more compact.

[0014] Preferably, a groove is formed in the middle of the lower front side of the fixed long plate, and a detection device is fixedly installed inside the groove.

[0015] By adopting the above technical solution, the tank provides a dedicated installation position for the detection device, which can protect the detection device from external collision damage, and at the same time facilitate the detection device to perform its detection function in a suitable position.

[0016] Preferably, the fixed long plate has limit grooves on both the left and right sides of its front end, and the column moves inside the limit grooves.

[0017] By adopting the above technical solution, the limiting groove can restrict and guide the movement trajectory of the column, prevent the column from deviating during movement, and ensure the stability and accuracy of the column's movement.

[0018] Preferably, a large toothed disc is rotatably provided on the outer side of the column, and a chain body is provided on the outer side of the large toothed disc.

[0019] By adopting the above technical solution, the large chain can rotate around the column, thereby transmitting power through the chain body, realizing power transmission between related components, and ensuring the normal operation of the mechanical transmission function of the device.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model uses a telescopic rod, a cylinder, and a small gear. The telescopic rod can be flexibly adjusted in length to adapt to different chain tension requirements, the cylinder can stably support and transmit force, and the small gear can achieve precise fine-tuning. The three work together to efficiently, stably, and accurately push the chain downward to achieve the purpose of chain tension adjustment.

[0021] 2. This utility model utilizes a control device, a wireless receiving module, and a detection device. The wireless receiving module rapidly transmits information to the control device, enabling the control device to automatically adjust the chain tension in a timely manner. This ensures stable chain operation during riding and improves the safety, smoothness, and reliability of riding. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the installation structure of the detection device of this utility model; Figure 3 This is a schematic diagram of the installation structure of the large toothed disc of this utility model; Figure 4 This is a schematic diagram of the installation structure of the telescopic rod of this utility model.

[0023] In the diagram: 1. Chain body; 2. Large chainring; 3. Column; 4. Small chainring; 5. Control device; 6. Wireless receiver module; 7. Fixed long plate; 8. Column groove; 9. Detection device; 10. Cylinder; 11. Limiting groove; 12. Body groove; 13. Telescopic rod one; 14. Telescopic rod two; 15. Inner groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] The following describes an embodiment of this utility model based on its overall structure.

[0026] like Figures 1 to 4 As shown, this utility model provides a carbon fiber bicycle chain tension adjustment device, including a telescopic rod 14 fixedly installed inside the left and right sides of a fixed long plate 7, a telescopic rod 13 slidably installed at the lower end of the telescopic rod 14, a cylinder 10 fixedly installed at the lower end face of the telescopic rod 13, and a small toothed disc 4 rotatably installed on the outer side of the cylinder 10 to adjust the tension.

[0027] The front end of the fixed long plate 7 is provided with column grooves 8 on both the left and right sides to facilitate rotation, and the column grooves 8 are provided with rotating columns 3.

[0028] A control device 5 is fixedly installed in the middle of the upper end of the fixed long plate 7 to play a control role, and the control device 5 is attached to the telescopic rod 14. A wireless receiving module 6 is fixedly installed in the middle of the upper end of the control device 5.

[0029] The upper end face of the fixed long plate 7 has inner grooves 15 on both the left and right sides, and the telescopic rod 14 is fixed inside the inner groove 15 to play a fixing role.

[0030] A groove 12 is provided in the middle of the lower front side of the fixed long plate 7, and a detection device 9 is fixed inside the groove 12 to perform the detection function.

[0031] Limiting grooves 11 are provided on both the left and right sides of the front end of the fixed long plate 7 to limit its movement, and the column 3 moves inside the limiting grooves 11.

[0032] A large toothed disc 2 is provided on the outer side of the column 3 to rotate, and a chain body 1 is provided on the outer side of the large toothed disc 2.

[0033] Working principle and process of a carbon fiber bicycle chain tension adjustment device: The device mainly revolves around the fixed long plate 7, and uses its related components to achieve the function of adjusting the bicycle chain tension. Its core principle is to use the telescopic cooperation of telescopic rod 13 and telescopic rod 2 14 to change the position of the small chainring 4, thereby adjusting the tension of the chain body 1. Simultaneously, the control device 5 can control the telescopic rod 2 14, and the detection device 9 can monitor the relevant status in real time, providing a basis for chain tension adjustment. When the bicycle is in normal use, the chain body 1 is fitted over the outside of the large chainring 2 and the small chainring 4. When the large chainring 2 rotates, it drives the small chainring 4 to rotate through the chain body 1, thus realizing the transmission of power to the bicycle. At this time, the telescopic rod 13 and telescopic rod 2 14 are in a relatively stable state. In the fixed state, the fixed long plate 7 and its components remain relatively stationary. When the chain tension needs to be adjusted, the control device 5 begins to function. The wireless receiving module 6 at the upper middle of the control device 5 can receive external adjustment commands (such as commands sent via a mobile APP) and transmit the commands to the control device 5 to prepare for adjustment. After receiving the adjustment command, the control device 5 controls the telescopic rod 14. Since the telescopic rod 14 is fixed inside the left and right sides of the fixed long plate 7 (fixed by the inner groove 15), and the telescopic rod 13 is slidably set at the lower end of the telescopic rod 14, the control device 5 can make the telescopic rod 14 extend and retract. Extension situation: When the telescopic rod 14 extends... This will push the telescopic rod 13 downward. A cylinder 10 is fixedly mounted on the lower end of the telescopic rod 13. A small toothed disc 4 is rotatably mounted on the outer side of the cylinder 10. Therefore, the small toothed disc 4 will move downward with the telescopic rod 13, thereby tightening the chain body 1 and increasing the chain tension. In the shortening case: when the telescopic rod 14 shortens, the telescopic rod 13 moves upward, and the small toothed disc 4 also moves upward, reducing the chain tension. During the telescopic rod extension and retraction adjustment process, a column 3 is fixedly mounted in the column grooves 8 on the left and right sides of the front end of the fixed long plate 7. The column 3 moves inside the limiting groove 11, which plays a certain limiting and guiding role, ensuring the stability of the adjustment process. At the same time, the outer side of the column 3 is rotatably mounted. The bicycle has a large chainring 2, which is connected to the small chainring 4 via the chain body 1, making the chain drive smoother. A detection device 9 is fixedly installed inside the groove 12 in the middle of the lower front end of the fixed long plate 7. The detection device 9 can detect the chain tension, running status and other information in real time. The detection device 9 feeds back the detected information to the control device 5. The control device 5 further adjusts the extension degree of the telescopic rod 14 according to the feedback information to achieve precise adjustment of the chain tension. When the information fed back by the detection device 9 shows that the chain tension has reached a suitable state, the control device 5 stops controlling the telescopic rod 14, and the adjustment process ends. At this time, the bicycle chain is in a suitable tension state and can run normally.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A carbon fiber bicycle chain tension adjustment device comprising a fixed long plate (7), characterized in that: The fixed long plate (7) has two telescopic rods (14) fixedly installed inside the left and right sides. The lower end of the telescopic rod (14) is provided with a telescopic rod (13). The lower end face of the telescopic rod (13) is fixed with a cylinder (10). The outer side of the cylinder (10) is provided with a small toothed disc (4).

2. A carbon fiber bicycle chain tension adjustment device as defined in claim 1, wherein: The fixed long plate (7) has column grooves (8) on both the left and right sides of its front end, and a column (3) is rotatably installed inside the column groove (8).

3. A carbon fibre bicycle chain tension adjustment device as claimed in claim 2, wherein: A control device (5) is fixedly provided in the middle of the upper end face of the fixed long plate (7), and the control device (5) is attached to the telescopic rod (14). A wireless receiving module (6) is fixedly provided in the middle of the upper end of the control device (5).

4. A carbon fiber bicycle chain tension adjustment device as defined in claim 1, wherein: The upper end face of the fixed long plate (7) is provided with inner grooves (15) on both the left and right sides, and the telescopic rod (14) is fixed inside the inner groove (15).

5. A carbon fiber bicycle chain tension adjustment device as defined in claim 1, wherein: A body groove (12) is provided in the middle of the lower front side of the fixed long plate (7), and a detection device (9) is fixedly provided inside the body groove (12).

6. A carbon fiber bicycle chain tension adjustment device as defined in claim 1, wherein: The fixed long plate (7) has limit grooves (11) on both the left and right sides of its front end, and the column (3) moves inside the limit grooves (11).

7. A carbon fibre bicycle chain tension adjustment device as claimed in claim 6, characterised in that: The outer side of the column (3) is provided with a large toothed disc (2), and the outer side of the large toothed disc (2) is provided with a chain body (1).