Anti-jamming flexible sprocket

Abstract

The utility model discloses a kind of anti-jamming flexible chain wheels, including spoke disc group and chain tooth ring.The spoke disc group includes first spoke disc and the second spoke disc of cooperation installation, two spoke disc structures are same, all include shaft sleeve, outer ring and multiple radial arrangement spoke, first spoke disc and second spoke disc are formed flexible structure by overlapping assembly, multiple spoke is distributed in circumferential staggered, the chain tooth ring is fixed in spoke disc group outer periphery.In working process, the flexible deformation of spoke can absorb impact load in chain movement;When foreign matter is jammed between sprocket and chain, chain tooth ring can be offset due to spoke disc group deformation, thereby realizing foreign matter automatic disengagement, avoid transmission system jamming.The structure has good impact release capacity and foreign matter jamming prevention performance, improves chain transmission system operating safety and reliability.

Description

Technical Field

[0001] This utility model relates to the field of sprocket drive structure technology, specifically a flexible sprocket that prevents jamming. Background Technology

[0002] Chain drive mechanisms are widely used in motorcycles, mopeds, electric bicycles, and light engineering equipment for transmitting power and driving. Traditional sprocket structures typically consist of a rigid metal disc integrally pressed or welded to the chain tooth ring, connected to the main shaft via a central mounting hole. These structures are compact, have mature manufacturing processes, and can effectively transmit torque and achieve chain drive. However, in complex road conditions or environments with many foreign objects, such as gravel roads, muddy areas, or agricultural machinery operations, the chain and sprocket are prone to jamming due to foreign objects getting caught in them.

[0003] If foreign objects (such as small stones, broken metal shavings, plant fibers, etc.) become embedded between the sprocket and the chain, the rigid sprocket structure is unlikely to deform or reposition itself, causing the chain to jam instantly. In severe cases, this can lead to chain tooth breakage, chain breakage, or even damage to the spindle and failure of the transmission system. Furthermore, traditional sprockets lack sufficient buffering mechanisms when subjected to impact loads (such as rapid acceleration or steep incline starts), easily causing chain meshing impacts and transmission vibrations, affecting vehicle lifespan and safety.

[0004] To address the aforementioned issues, some technical solutions have attempted improvements using elastic washers, double-layer chain disks, or flexible connection structures. However, these solutions generally suffer from practical problems such as complex structures, high costs, or difficulty in handling dynamic foreign objects.

[0005] Therefore, there is an urgent need to provide a novel sprocket structure with a reasonable structure and flexible adaptability, which can effectively mitigate operational shocks and have the ability to adaptively remove foreign objects while maintaining basic transmission functions, thereby improving the stability and safety of the sprocket system in complex environments. The above-mentioned problems are precisely the technical fields that this utility model focuses on and effectively improves. Utility Model Content

[0006] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, the technical solution adopted by this utility model is as follows: a flexible sprocket with anti-jamming capability, comprising: a spoke assembly and a chain tooth ring. The spoke assembly includes a first spoke and a second spoke that mates with it. The first and second spokes have the same structure, each including a central bushing, an outer ring, and multiple spokes arranged radially. The spokes on the surfaces of the first and second spokes are assembled in an overlapping manner, with the multiple spokes staggered in the circumferential direction to form a flexible and deformable structure. The chain tooth ring is fixed to the outer periphery of the spoke assembly.

[0008] In a preferred embodiment, the first and second spokes are further configured such that multiple spokes on their surfaces are spirally distributed. These spokes combine to form a multi-path flexible support structure, effectively mitigating impact loads during chain movement and improving overall transmission stability. Specifically, if a foreign object becomes stuck during sprocket and chain engagement, the spoke assembly can use flexible deformation to cause the chain tooth rings to shift eccentrically, assisting the foreign object in disengaging in the chain drive direction, thereby preventing chain jamming or damage.

[0009] In a preferred embodiment, the bushing is further configured with a polygonal hole structure to accommodate drive shafts with non-circular cross-sections, thereby improving torque transmission stability and efficiency. Specifically, the connection between the non-circular hole and the non-circular shaft achieves more reliable torque coupling and reduces the risk of meshing slippage.

[0010] In a preferred embodiment, the outer ring is further configured as a continuous closed annular structure with multiple spokes symmetrically distributed along its inner edge. A toothed ring is positioned outside the outer ring, with a transition buffer gap between them. Specifically, this gap, in conjunction with the flexible deformation space of the spokes, provides a springback restoring force after the toothed ring shifts, enabling rapid structural reset and maintaining stable operation.

[0011] In a preferred embodiment, the first and second spokes are further configured to enable quick assembly and modular replacement via snap-fit ​​structures or locating holes on the bushing and outer ring. Specifically, this connection method simplifies the assembly process, facilitates subsequent replacement and maintenance, and effectively reduces maintenance costs.

[0012] In summary, this utility model enhances the impact resistance and foreign object handling capabilities of the chain drive device through the combined design of the flexible spoke structure and the chain tooth ring, realizing the automatic yielding and anti-jamming functions of the sprocket system. It has excellent structural adaptability, safety and reliability, and is particularly suitable for sprocket drive applications where there is a risk of foreign objects or large load impact fluctuations.

[0013] The beneficial effects achieved by this utility model are as follows:

[0014] 1. In this utility model, the first spoke (110) and the second spoke (120) are designed to overlap and assemble. Multiple spokes (113) on the surface of the two spokes are staggered in the circumferential direction to form a flexible and deformable structure. This not only provides stable support for the chain tooth ring (200), but also absorbs impact loads during operation, thereby improving the impact resistance and smooth operation of the transmission system.

[0015] In this invention, during the meshing process of the sprocket and chain, when a foreign object intervenes, the spoke assembly (100) can undergo localized flexible deformation, thereby driving the chain tooth ring to achieve instantaneous eccentric offset. This allows the foreign object to be smoothly pushed out or disengaged within the meshing area, preventing the sprocket and chain from jamming. This significantly improves the anti-jamming performance and foreign object tolerance of the sprocket system, ensuring the safe operation of the transmission system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0017] Figure 2 This is an exploded structural diagram of one embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the first and second spokes according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the surface structure of the spoke assembly according to an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the surface structure of the first spoke of an embodiment of the present invention.

[0021] Figure label:

[0022] 100, Spoke assembly; 110, First spoke; 120, Second spoke; 111, Bushing; 112, Outer ring; 113, Spoke; 200, Chain tooth ring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0024] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0025] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing an anti-jamming flexible sprocket.

[0026] Combination Figures 1-5 As shown, the present invention provides an anti-jamming flexible sprocket, comprising: a spoke assembly 100 and a chain tooth ring 200.

[0027] The spoke assembly 100 includes a first spoke 110 and a second spoke 120 that mates with it. The first spoke 110 and the second spoke 120 have identical structures, each including a bushing 111 located in the center, an outer ring 112 surrounding the bushing 111, and a plurality of spokes 113 extending radially from the bushing 111 to the outer ring 112. The first spoke 110 and the second spoke 120 are positioned and installed using a snap-fit ​​structure or positioning holes, forming a stable fit.

[0028] During assembly, the first spoke 110 and the second spoke 120 are arranged in an overlapping manner, with multiple spokes 113 on their surfaces staggered in the circumferential direction. The staggered arrangement is set at different positions during installation to ensure a flexible and deformable structure. When the spoke assembly 100 is subjected to external force, the multiple spokes 113 can generate slight deformation within the structural constraints to absorb or release impact energy during movement.

[0029] The chain tooth ring 200 is fixedly installed on the outer periphery of the spoke assembly 100, and the connection method can be interference fit, screw fixing or riveting. The chain tooth ring 200 meshes with the drive chain to realize power output or input, and the spoke assembly 100 is installed on the drive shaft through the bushing 111.

[0030] In actual operation, the sprocket ring 200 rotates as a whole with the spoke assembly 100. When the chain is disturbed by foreign objects, such as foreign objects getting stuck, during the meshing transmission on the sprocket ring 200, the flexible gaps between the multiple spokes 113 allow for local deformation, thereby driving the sprocket ring 200 to produce a slight eccentric offset. This offset provides space for the foreign object to disengage, allowing it to be pushed out of the meshing area as the chain continues to move, preventing the sprocket and chain from locking up.

[0031] Furthermore, such as Figure 4 As shown, multiple spokes 113 are arranged in a spiral pattern on the surfaces of the first spoke 110 and the second spoke 120, forming a multi-path flexible support network structure. This structure has good impact resistance and deformation self-recovery characteristics, which can not only effectively alleviate the impact of movement, but also improve the emergency removal capability of foreign objects.

[0032] like Figure 5 As shown, the bushing 111 has a polygonal hole structure, preferably a hexagonal hole or an octagonal hole, which can be tightly fitted with a non-circular cross-section drive shaft to improve the torsional resistance and stability of the connection and avoid slippage during rotation.

[0033] The outer ring 112 is an integrally formed continuous closed ring structure used to constrain the external free ends of multiple spokes 113. To ensure that the chain tooth ring 200 can automatically return to its original position after flexible displacement, a limited buffer gap is reserved between the outer ring 112 and the chain tooth ring 200. This gap can absorb motion stress after deformation and assist the chain tooth ring 200 to automatically return to its original position, maintaining meshing stability.

[0034] In addition, the first spoke 110 and the second spoke 120 are assembled by a snap-fit ​​structure or positioning hole provided on the bushing 111 and the outer ring 112, which makes them easy to assemble and disassemble, and facilitates modular maintenance and replacement in the later stage.

[0035] In summary, this utility model introduces interlaced spiral spokes 113 with flexible deformation capability into the spoke assembly 100, and in conjunction with the transmission structure of the chain tooth ring 200, it ensures stable power transmission while giving the sprocket system good resistance to foreign object interference and anti-jamming function. It is particularly suitable for sprocket transmission systems of vehicles, construction machinery or agricultural machinery in complex environments.

[0036] Working principle and usage process of this utility model:

[0037] In practical use, the anti-jamming flexible sprocket is installed in the transmission system and works in conjunction with the chain. The chain tooth ring 200 is fixedly connected to the outer periphery of the spoke assembly 100, and the chain meshes with the chain tooth ring 200 to achieve power transmission. The drive shaft is inserted into the bushing 111 at the center of the spoke assembly 100. The bushing 111 adopts a polygonal hole design to adapt to drive shafts with non-circular cross-sections, thereby effectively improving torque transmission efficiency and enhancing connection stability.

[0038] During normal chain operation, the chain tooth ring 200 rotates as a whole with the spoke assembly 100, driving or following the chain. At this time, the staggered spokes 113 form a multi-path flexible support structure, which can buffer the impact load generated by chain meshing during operation, reduce the mechanical stress between the chain and gears, and extend the service life of the system.

[0039] When foreign objects such as debris, fibers, or pebbles get caught in the chain during operation, traditional rigid sprocket structures often cause the chain to jam or the chain teeth to be damaged because they cannot deform. This invention, through the design of staggered flexible spokes 113 within the spoke assembly 100, can generate flexible deformation the instant a foreign object is embedded. This drives the chain tooth ring 200 to make a slight eccentric offset, thereby creating a release space. This allows the foreign object to be gradually pushed out or removed from the chain tooth area as the chain is driven, achieving an anti-jamming effect.

[0040] In addition, a buffer gap is provided between the outer ring 112 and the chain tooth ring 200. After the flexible deformation is released, the chain tooth ring 200 can automatically return to its original position under the constraint of the outer ring 112, ensuring the stable operation of the structure.

[0041] The first spoke 110 and the second spoke 120 of the spoke assembly 100 can be quickly assembled and disassembled through a snap-fit ​​structure or positioning hole provided on the bushing 111 and the outer ring 112, which facilitates modular replacement and daily maintenance of the system.

[0042] In summary, this utility model, through its flexible structural design, not only achieves impact mitigation during chain operation but also possesses the ability to actively deform and release when the chain clamps an object, significantly improving the operational stability and safety of the chain drive system under complex working conditions, and has good practical and promotional value.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A flexible sprocket designed to prevent jamming, characterized in that, include: The spoke assembly (100) and the chain tooth ring (200) are provided. The spoke assembly (100) includes a first spoke (110) and a second spoke (120) that are installed with it. The first spoke (110) and the second spoke (120) have the same structure and each includes multiple spokes (113) arranged radially, a bushing (111) set in the middle, and an outer ring (112) set around the bushing (111). The spokes (113) on the surface of the first spoke (110) and the second spoke (120) are assembled in an overlapping manner. The multiple spokes (113) on the surface of the first spoke (110) and the second spoke (120) are staggered in the circumferential direction to form a flexible and deformable structure. The chain tooth ring (200) is fixed to the outer periphery of the spoke assembly (100).

2. The anti-jamming flexible sprocket according to claim 1, characterized in that, The first spoke (110) and the second spoke (120) have multiple spokes (113) arranged in a spiral pattern on their surfaces. The multiple spokes are combined to form a multi-path flexible support structure to alleviate the impact load during the chain movement.

3. The anti-jamming flexible sprocket according to claim 1 or 2, characterized in that, The bushing (111) has a polygonal hole structure, which is suitable for installation on non-circular cross-section drive shafts and improves torque transmission efficiency.

4. The anti-jamming flexible sprocket according to claim 1, characterized in that, The outer ring (112) is a continuous closed ring structure with multiple spokes (113) distributed along its inner edge. A transition buffer gap is provided between the outer ring (112) and the chain tooth ring (200).

5. The anti-jamming flexible sprocket according to claim 1, characterized in that, The first spoke (110) and the second spoke (120) are assembled by a snap-fit ​​structure or positioning hole on the surface of the bushing (111) and the outer ring (112) to facilitate modular replacement and maintenance.

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