Synchronous transmission stabilizing device

Abstract

The utility model discloses a synchronous transmission stabilizing device which comprises a minimum tooth piece arranged on the outermost side and a maximum tooth piece arranged on the innermost side, and a plurality of middle tooth pieces with the sizes gradually increased in sequence are arranged between the minimum tooth piece and the maximum tooth piece. A plurality of meshing teeth are evenly distributed on the circumference of the minimum tooth piece, the circumference of the middle tooth piece and the circumference of the maximum tooth piece, and a fixed track toothless tooth piece is detachably arranged on the side, away from the minimum tooth piece, of the maximum tooth piece. Through the optimized and improved design of the product, when a transmission medium such as a chain or a belt is located on the innermost maximum tooth sheet, the situation that the transmission medium is disengaged from the meshing surface is effectively avoided, the chain or the belt cannot be disengaged under the road condition or misoperation of a rider, and the service life of the chain or the belt is prolonged. And transmission media such as a chain or a belt can stably work in the current driving track, so that the effects of improving the safety, totally selecting driving and guaranteeing the personal safety of a user are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of flywheel accessory devices, in particular to a synchronous transmission stabilizing device. Background Art

[0002] Synchronous drive transmissions, such as bicycles, electric bicycles, and electric motorcycles, all involve a drive medium. For example, single-speed or multi-speed bicycles inevitably involve a drive medium: a metal chain or rubber belt. At high speeds, the flywheel and chain / belt create a dynamically unstable structure. The transmission medium experiences lateral oscillation, creating an extremely unstable state. As riding speed increases, the probability of the chain or belt disengaging increases exponentially. This unstable structure can also be exacerbated by uneven road conditions and radial runout of the flywheel. The larger the sprocket, the greater the radial runout. This can eventually cause the chain or belt to slip from the flywheel, leading to jamming or even instantaneous transmission seizure. More serious consequences can result in a safety incident. In traditional products without protective stabilization devices, once the gear system is shifted to the largest sprocket, the largest sprocket on the flywheel is at the innermost edge. At this point, the chain or belt is free inside the flywheel, making the risk of chain or belt disengagement difficult to avoid during practical riding.

[0003] Another common issue occurs when changing gears on variable-speed bicycles or electric bicycles. This is particularly true for off-road bicycles, especially those in mountainous or wooded terrain. When using the highest gear, the gear is typically shifted to the largest cog on the innermost sprocket of the flywheel, close to the wheel. Because every transmission has a certain amount of free travel when shifting gears, the instability of the drive structure and the influence of the rear derailleur's travel can easily cause the rear derailleur to overshoot, leading to chain or belt dislocation and jamming. This condition is highly likely to occur whenever the transmission is shifted, regardless of whether the bicycle is in motion or static conditions, causing structural damage to the vehicle's rear-wheel drive system. Utility Model Content

[0004] In response to the above technical problems in the related art, the present invention proposes a synchronous transmission stabilizing device, which can overcome the above deficiencies in the prior art.

[0005] In order to achieve the above technical purpose, the technical solution of the utility model is implemented as follows:

[0006] A synchronous transmission stabilizing device;

[0007] The synchronous transmission stabilizing device includes a smallest tooth plate arranged on the outermost side and a largest tooth plate arranged on the innermost side. A plurality of intermediate tooth plates with increasing sizes are arranged between the smallest tooth plate and the largest tooth plate. A plurality of meshing teeth are distributed on the circumference of the smallest tooth plate, the intermediate tooth plates and the largest tooth plate. A fixed track toothless tooth plate is detachably provided on the side of the largest tooth plate away from the smallest tooth plate.

[0008] Furthermore, the outer diameter of the toothless tooth piece of the fixed rail is greater than or equal to 5 mm compared with the outer diameter of the largest tooth piece.

[0009] Furthermore, the toothless tooth plates of the fixed rail are evenly distributed with a number of tooth plate punchings for enhancing toughness and strength.

[0010] Furthermore, the smallest tooth piece, the middle tooth piece, the largest tooth piece and the toothless tooth piece of the fixed track are coaxially provided with axial holes of the same size.

[0011] Furthermore, when the number of the intermediate tooth plates is 6, the distance between the largest tooth plate and the toothless tooth plate of the fixed track is 3 mm.

[0012] Furthermore, when the number of the intermediate tooth pieces is 8, the distance between the largest tooth piece and the toothless tooth piece of the fixed track is 2.5 mm.

[0013] Furthermore, a hollow portion is provided on the body of the fixed track toothless tooth piece, and the fixed track toothless tooth piece is a hollow design.

[0014] Furthermore, the toothless tooth plates of the fixed rail are made of metal.

[0015] The beneficial effects of the present invention are as follows: through the optimized and improved design of the product of the present invention, the situation in which the transmission medium such as the chain or belt is disengaged from the meshing surface when it is on the innermost and largest tooth piece can be effectively avoided. Regardless of the road conditions or the rider's misoperation, the chain or belt will not be disengaged. The transmission medium such as the chain or belt will work stably in the current driving trajectory, thereby achieving the effect of improving safety, full-select driving, and protecting the personal safety of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1It is a three-dimensional diagram of a synchronous transmission stabilizing device according to an embodiment of the present utility model;

[0018] Figure 2 This is a side view of a synchronous transmission stabilizing device according to an embodiment of the present utility model;

[0019] In the figure: 1. Smallest gear; 2. Middle gear; 3. Largest gear; 4. Engaging teeth; 5. Fixed track gear without teeth; 6. Gear punching; 7. Flywheel; 8. Axle hole. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0021] It should be understood that in the description of the embodiments of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the embodiments of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0022] like Figure 1-2 As shown, a synchronous transmission stabilizing device according to an embodiment of the present invention includes a minimum tooth plate 1 arranged on the outermost side and a maximum tooth plate 3 arranged on the innermost side, and a plurality of intermediate tooth plates 2 with gradually increasing sizes are provided between the minimum tooth plate 1 and the maximum tooth plate 3, and a plurality of meshing teeth 4 are distributed on the circumference of the minimum tooth plate 1, the intermediate tooth plate 2 and the maximum tooth plate 3, and a fixed track toothless tooth plate 5 is detachably provided on the side of the maximum tooth plate 3 away from the minimum tooth plate 1.

[0023] According to a synchronous transmission stabilizing device according to an embodiment of the present invention, in a specific embodiment, the outer diameter of the toothless tooth piece 5 of the fixed rail is greater than or equal to 5 mm compared with the outer diameter of the largest tooth piece 3.

[0024] According to a synchronous transmission stabilizing device described in an embodiment of the present invention, in a specific embodiment, a plurality of tooth plate punchings 6 for enhancing toughness and strength are evenly distributed on the toothless tooth plate 5 of the fixed rail.

[0025] According to a synchronous transmission stabilizing device described in an embodiment of the present invention, in a specific embodiment, the smallest gear plate 1, the middle gear plate 2, the largest gear plate 3 and the fixed rail toothless gear plate 5 are coaxially provided with shaft holes 8 of the same size.

[0026] According to a synchronous transmission stabilizing device described in an embodiment of the present invention, in a specific embodiment, when the number of the intermediate gear pieces 2 is 6, the distance between the largest gear piece 3 and the fixed track toothless gear piece 5 is 3 mm.

[0027] According to a synchronous transmission stabilizing device described in an embodiment of the present invention, in a specific embodiment, when the number of the intermediate gear pieces 2 is 8, the spacing between the largest gear piece 3 and the fixed track toothless gear piece 5 is 2.5 mm.

[0028] According to a synchronous transmission stabilizing device described in an embodiment of the present invention, in a specific embodiment, a hollow portion is provided on the body of the fixed track toothless tooth piece 5, and the fixed track toothless tooth piece 5 is a hollow design.

[0029] According to a synchronous transmission stabilizing device described in an embodiment of the present invention, in a specific embodiment, the fixed rail toothless gear piece 5 is made of metal.

[0030] In order to facilitate understanding of the above technical solutions of the present invention, the above technical solutions of the present invention are described in detail below through specific usage methods.

[0031] During specific use, according to a synchronous transmission stabilization device described in the present invention, the principle of binding of transmission media such as chains or belts is utilized, and a fixed track toothless sprocket 5 is separately additionally provided on the inner side of the largest sprocket 3, and the preset outer diameter of the device component is equal to or slightly larger than the largest sprocket 35mm, so that the diameter of the largest sprocket 3 after covering the chain or belt is always smaller than the outer diameter of the fixed track toothless sprocket 5, that is, when the rear derailleur utilizes the free travel redundancy to move toward the wheel side, it encounters interference from the predetermined track sprocket and cannot cross it, thereby achieving controllable binding. In addition, the fixed track toothless sprocket 5 and the largest sprocket 3 are spaced apart at an appropriate and reasonable distance. For example, in the case of an 8-speed flywheel, the fixed track toothless sprocket 5 and the largest sprocket 3 are spaced apart by 3.0MM. In the case of a 10-speed flywheel, the fixed track toothless sprocket 5 and the largest sprocket 3 are spaced apart by 2.5MM. The data for this distance comes from the difference in thickness of chains at different speed levels. The purpose of setting this distance is to ensure that the normal operation of the flywheel is not affected, that is, during normal operation of the forward and reverse gears, no lateral friction interference is generated between the inner and outer chain plates of the chain and the side surfaces of the flywheel sprockets.

[0032] The design premise of the synchronous transmission stabilizing device described in the present invention is to ensure the safe driving of the vehicle, and even to take into account a predictable fool-proof design in the event of improper operation or erroneous operation. At the same time, it reasonably and comprehensively considers the non-interference compatibility under normal driving conditions.

[0033] Firstly, the difference between the synchronous transmission stabilizing device described in the present invention and the traditional flywheel is that:

[0034] 1. Functionality: Traditional cassettes lack a stable protection function for the largest sprocket (3). No mainstream brands offer this feature. In actual use, when a transmission medium, such as a chain or belt, is on the innermost, largest sprocket (3), conventional standardized cassettes can experience disengagement. If a chain disengagement occurs under unstable conditions, the derailleur cannot correct or prevent it, leading to inevitable jamming or damage to the chain, cassette sprockets, and rear derailleur pulley.

[0035] 2. From an appearance perspective: As of the time of this disclosure, no other products with similar appearance exist, judging from the major flywheel brands in the mainstream market. The integrated stabilization device of this technical solution can be considered a passive protection device. Its uniform, unobtrusive appearance does not affect the standard appearance of the main flywheel. It also creates visual consistency with the largest sprocket 3 of existing flywheels, creating a visually integrated and refined effect that meets consumers' aesthetic requirements for products.

[0036] 3. From a design perspective: Traditional flywheels do not have this design component structure. This utility model's technical solution, based on years of industry experience, aims to rationally and effectively solve the problems existing in the actual use of traditional products. The design device perfectly solves these problems without adding any new secondary problems.

[0037] 4. From a practical perspective: As mentioned above, conventional flywheels lack any stability protection when the rider shifts the gears to the largest cog, creating a high risk of unpredictable disengagement. However, with the same flywheel equipped with this stability device, when the chain or belt is in the largest cog, the stability device provides passive stability protection, restraining the chain or belt. Regardless of road conditions or rider error, the chain or belt will remain stable within its current drive path, ensuring safe riding.

[0038] Secondly, the advantages of the synchronous transmission stabilizing device described in the utility model over traditional products are:

[0039] 1. Appearance: The appearance is novel, and the design of this stabilizer also meets the requirements of optimized aesthetics. This design does not break the structure of the original traditional flywheel itself, but integrates it with the original product in a reasonable and unified manner, and adds functional requirements.

[0040] 2. Practicality: This stabilizer is an independent structural component that is a functional addition to the original flywheel product. This device has a wide range of applicability and is not limited to specific product specifications, thus meeting the requirements of flexibility and diversity.

[0041] 3. Economical: For the consumer market, since this product is an independent component, consumers can quickly replace it at any time without completely replacing the original drive and transmission system, thereby obtaining a higher and better riding experience.

[0042] 4. Design: As mentioned above, the stabilizer is not designed for specific directional control. In principle, it is compatible with all mainstream flywheels. While its primary function is stability, it features a hollowed-out design with additional features to protect the rear derailleur from dirt, sticking, and damage. The metal design ensures long-term durability.

[0043] To sum up, with the help of the above-mentioned technical solution of the utility model, through the optimization and improvement design of the product of the utility model, the situation where the transmission medium such as the chain or belt is disengaged from the meshing surface when it is on the innermost and largest tooth piece can be effectively avoided. Regardless of the road conditions or the rider's misoperation, the chain or belt will not be disengaged. The transmission medium such as the chain or belt will work stably in the current driving trajectory, thereby achieving the effect of improving safety, full-select driving, and protecting the personal safety of users.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A synchronous transmission stabilizing device, characterized in that: The invention comprises a smallest tooth piece (1) arranged at the outermost side and a largest tooth piece (3) arranged at the innermost side, a plurality of intermediate tooth pieces (2) of gradually increasing sizes are arranged between the smallest tooth piece (1) and the largest tooth piece (3), a plurality of meshing teeth (4) are distributed on the circumference of the smallest tooth piece (1), the intermediate tooth piece (2) and the largest tooth piece (3), and a fixed track toothless tooth piece (5) is detachably arranged on a side of the largest tooth piece (3) away from the smallest tooth piece (1).

2. A synchronous transmission stabilizing device according to claim 1, characterized in that: The outer diameter of the fixed track toothless tooth piece (5) is greater than or equal to 5 mm compared to the outer diameter of the largest tooth piece (3).

3. A synchronous transmission stabilizing device according to claim 1, characterized in that: The fixed rail toothless tooth plate (5) is evenly distributed with a plurality of tooth plate punching holes (6) for enhancing toughness and strength.

4. A synchronous transmission stabilizing device according to claim 1, characterized in that: The smallest tooth piece (1), the middle tooth piece (2), the largest tooth piece (3), and the fixed track toothless tooth piece (5) are coaxially provided with shaft holes (8) of the same size.

5. The synchronous transmission stabilizing device according to claim 1, characterized in that: When the number of the intermediate tooth pieces (2) is 6, the spacing between the largest tooth piece (3) and the toothless tooth piece (5) of the fixed track is 3 mm.

6. The synchronous transmission stabilizing device according to claim 1, characterized in that: When the number of the intermediate tooth pieces (2) is 8, the spacing between the largest tooth piece (3) and the fixed track toothless tooth piece (5) is 2.5 mm.

7. The synchronous transmission stabilizing device according to claim 1, characterized in that: A hollow portion is provided on the body of the fixed track toothless tooth piece (5), and the fixed track toothless tooth piece (5) is a hollowed-out design.

8. A synchronous transmission stabilizing device according to any one of claims 1 to 7, characterized in that: The fixed rail toothless tooth piece (5) is made of metal material.

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