Low wear variable speed flywheel

Abstract

The utility model provides a low wear's variable speed flywheel relates to variable speed flywheel technical field, including the first flywheel, second flywheel and third flywheel of detachable connection, the second flywheel includes a plurality of different diameter's independent flywheel piece, connecting piece includes first connecting portion and second connecting portion, the first connecting portion inserts the first flywheel, second flywheel and third flywheel of series connection, the second connecting portion can be detachably connected in first connecting portion, the utility model discloses the first flywheel, second flywheel and third flywheel structure of detachable connection, and the second flywheel is formed by a plurality of independent flywheel piece, forms modularization split design, when single flywheel piece appears abrasion, deformation or damage, need not to replace whole flywheel assembly, only need to be aimed at the dismounting and replacement damaged component, not only has simplified maintenance process, has shortened maintenance time, also avoided the waste of undamaged component, has reduced user's later maintenance cost and use cost.

Description

Technical Field

[0001] This utility model relates to the field of variable speed flywheel technology, and in particular to a low-wear variable speed flywheel. Background Technology

[0002] As a core component of the transmission system in bicycles, electric bicycles, and other similar vehicles, the performance of the freewheel directly affects the smoothness of gear shifting, power transmission efficiency, and service life. Traditional freewheels often adopt a one-piece structure design, where multiple freewheel plates of different diameters are fixedly connected to the core hub through welding, integral casting, or other methods to form an inseparable whole. In actual use, the freewheel plates need to frequently engage with the chain for transmission. As the usage time increases, the tooth surfaces of the freewheel plates will gradually wear down due to friction, impact, corrosion, and other factors, especially the freewheel plates corresponding to frequently used gears, where the wear is more severe. In addition, the gaps between the freewheel plates of a one-piece freewheel are fixed and usually small. During high-speed operation, adjacent freewheel plates are prone to frictional interference due to slight deformation or the entry of foreign objects, which not only aggravates wear but may also produce abnormal noises, jamming, and other problems, affecting the shifting experience.

[0003] The one-piece molded structure of traditional integrated gearbox flywheels results in high maintenance costs. When a single flywheel blade is excessively worn, the tooth surface is deformed, or it is damaged, the user can only replace the entire flywheel assembly because the components cannot be disassembled. This not only wastes a large number of undamaged parts, but also increases the user's operating costs. Based on this, a low-wear gearbox flywheel is proposed. Utility Model Content

[0004] To address the problem that existing integrated gear shift flywheels suffer from excessive wear, tooth surface deformation, or damage to individual flywheel plates, requiring replacement of the entire flywheel assembly due to the inseparability of components, resulting in the waste of numerous undamaged parts and increased user costs, this invention proposes a low-wear gear shift flywheel.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A low-wear variable speed flywheel, comprising:

[0007] The first flywheel, the second flywheel, and the third flywheel are detachably connected, and the second flywheel includes multiple independent flywheel segments of different diameters;

[0008] The connector includes a first connecting part and a second connecting part, wherein the first connecting part is inserted into and connected in series with the first flywheel, the second flywheel and the third flywheel, and the second connecting part is detachably connected to the first connecting part.

[0009] Preferably, the first connecting part includes a bonding ring, and a plurality of inserts are fixed in a circular array on one side of the bonding ring;

[0010] The inner walls of the first flywheel, the second flywheel, and the third flywheel are all arranged in a ring array with multiple slots, and the insert is inserted into the slots.

[0011] Preferably, the internal width of the slot is greater than the width at the external port.

[0012] Preferably, the second connecting part includes a plurality of screws, each of the inserts has a screw hole at its end, a protrusion is fixed on the inner ring of the third flywheel, and the screws pass through the protrusion and are screwed into the screw hole.

[0013] Preferably, the protrusion has a through hole, and the outer end of the through hole has a groove.

[0014] Preferably, the second flywheel includes a first flywheel segment, a second flywheel segment, a third flywheel segment, and a fourth flywheel segment with diameters decreasing from large to small.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This utility model adopts a detachable first flywheel, second flywheel and third flywheel structure, and the second flywheel is composed of multiple independent flywheel plates, forming a modular disassembly design. When a single flywheel plate is worn, deformed or damaged, it is not necessary to replace the entire flywheel assembly. Only the damaged parts need to be disassembled and replaced. This not only simplifies the maintenance process and shortens the maintenance time, but also avoids the waste of undamaged parts and reduces the user's later maintenance and usage costs.

[0017] 2. In this utility model, the first connecting part of the connector is inserted into the slot of the inner wall of each flywheel. After the insert passes through the slot of each component, it can effectively limit the relative rotation between the components and avoid the imbalance caused by structural loosening when the flywheel is running at high speed. At the same time, the screw of the second connecting part is screwed into the screw hole of the insert through the through hole on the protrusion to achieve tight fixation of each component and further improve the overall connection firmness.

[0018] 3. This utility model provides a reliable positioning benchmark for the assembly of various components through the precise insertion and matching of the insert and slot, effectively improving the overall assembly accuracy and ensuring the dynamic balance performance of the flywheel during operation; its modular structure and low wear design make it suitable not only for ordinary bicycles, but also for different models such as electric bicycles and light motorcycles, as well as for long-term high-intensity use scenarios, and has wide applicability and promotion value. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This utility model Figure 1 A structural diagram from another angle;

[0022] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the connector of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the third flywheel of this utility model;

[0025] In the diagram: 1. First flywheel; 11. Notch; 2. Second flywheel; 21. First flywheel plate; 22. Second flywheel plate; 23. Third flywheel plate; 24. Fourth flywheel plate; 3. Third flywheel; 31. Protrusion; 32. Through hole; 33. Groove; 4. Connector; 41. First connecting part; 411. Adhesive ring; 412. Insert; 42. Second connecting part; 421. Screw; 422. Screw hole; 5. Slot. Detailed Implementation

[0026] 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.

[0027] like Figures 1-5As shown, a low-wear variable speed flywheel includes a first flywheel 1, a second flywheel 2, a third flywheel 3, and a connecting piece 4. The first flywheel 1 has evenly distributed notches 11, which reduces weight without affecting structural strength. The first flywheel 1, second flywheel 2, and third flywheel 3 are all detachable, facilitating future maintenance and replacement. The first flywheel 1 has the largest diameter. The second flywheel 2 is composed of multiple independent flywheel plates of different diameters. Specifically, the second flywheel 2 includes a first flywheel plate 21, a second flywheel plate 22, a third flywheel plate 23, and a fourth flywheel plate 24 with diameters decreasing from large to small. This stepped diameter design can meet the transmission requirements of different gears, achieving smooth power switching and precise transmission. Secondly, each flywheel plate has precision meshing teeth on its edge. The surface of the teeth is carburized, quenched, and polished to form a high-hardness, low-friction wear-resistant layer, which can significantly reduce wear when meshing with the chain. To further enhance the low-wear performance, a uniform gap is reserved between each flywheel plate after installation. This can avoid frictional interference between adjacent flywheel plates during high-speed operation and guide airflow to pass through quickly, carrying away the heat generated by meshing and reducing tooth surface softening wear caused by high temperature. The connecting part 4 includes a first connecting part 41 and a second connecting part 42. The first connecting part 41 is inserted into and connected in series with the first flywheel 1, the second flywheel 2, and the third flywheel 3. The second connecting part 42 is detachably connected to the first connecting part 41.

[0028] Among them, see Figures 3-4 As shown, the first connecting part 41 includes a retaining ring 411. Multiple inserts 412 are fixed in a ring array on one side of the retaining ring 411 to ensure balanced force. During assembly, the retaining ring 411 can be tightly attached to the outer wall of the first flywheel 1 to play a role in initial positioning and fitting limit. Multiple slots 5 are provided in a ring array on the inner walls of the first flywheel 1, the second flywheel 2 and the third flywheel 3. The inserts 412 are inserted into the slots 5. The inner width of the slot 5 is greater than the width at the outer port.

[0029] The second connecting part 42 includes multiple screws 421. Each insert 412 has a screw hole 422 at its end. The specifications of the screw hole 422 match the screw 421. A protrusion 31 is fixed on the inner ring of the third flywheel 3. The number of protrusions 31 is the same as that of the insert 412. The screw 421 passes through the protrusion 31 and is screwed into the screw hole 422. The locking force of the screw 421 firmly connects the first connecting part 41 and the third flywheel 3, thereby achieving stable assembly of the entire connecting part 4 and the three flywheels. This detachable structure design also facilitates subsequent maintenance and component replacement.

[0030] As described above, when assembling the flywheel, the insert 412 can be first inserted into the slot 5 that passes through the inner wall of the first flywheel 1, so that the retaining ring 411 is close to the outer wall of the first flywheel 1. Then, the second flywheel 2 is installed. When installing the second flywheel 2, the first flywheel piece 21, the second flywheel piece 22, the third flywheel piece 23, and the fourth flywheel piece 24, which have slots 5, are sequentially placed on the outside of the connecting part formed by the multiple inserts 412, and the inserts 412 pass through the corresponding slots 5. Then, the third flywheel 3 is put on, and the inserts 412 are similarly placed on the outside of the connecting part formed by the multiple inserts 412. The end of the flywheel is inserted into the slot 5 on the third flywheel 3. Finally, the screw 421 is passed through the protrusion 31 and screwed into the corresponding screw hole 422. The screw 421 is slowly screwed in and gradually tightened until the screw 421 is completely locked. At this time, the first flywheel 1, the second flywheel 2 and the third flywheel 3 are tightly assembled into a complete flywheel through the connector 4. After the assembly is completed, a simple test can be performed on the flywheel as a whole. Rotate the flywheel to observe whether there are any problems such as jamming or abnormal noise, and ensure that the connection of each component is stable and the operation is smooth.

[0031] Compared to traditional integrated flywheels, the aforementioned modular flywheel has the following advantages: Firstly, it adopts a modular design, disassembling the flywheel body into multiple independent flywheel segments and components. When a flywheel segment suffers wear, deformation, or damage due to long-term use, it is not necessary to replace the entire flywheel; only the damaged individual flywheel segment needs to be disassembled and replaced. This removable and replaceable design not only simplifies the maintenance process, reduces maintenance difficulty and time costs, but also reduces unnecessary material waste and lowers the later maintenance costs of the equipment. Secondly, during the entire assembly process, the cooperation between the insert 412 and the slots 5 of each component forms a reliable positioning structure. After the insert 412 passes through the slots 5 of each component, it can effectively limit the relative rotation between the components, preventing the flywheel from becoming loose or unbalanced due to the relative rotation of the components during high-speed operation. This ensures the stability and safety of the flywheel's operation and also provides a positioning reference for subsequent fastening operations, improving the overall assembly accuracy.

[0032] Further, see Figure 5 As shown, a through hole 32 is provided along the thickness direction of the main body of the protrusion 31. The inner diameter of the through hole 32 is adapted to the diameter of the shank of the screw 421, providing a guide channel for the screw 421 to pass through. Near the outer end of the through hole 32, a groove 33 is also coaxially provided. The inner diameter of the groove 33 is larger than the inner diameter of the through hole 32, and the depth of the groove 33 matches the thickness of the head of the screw 421. During assembly, the shank of the screw 421 can smoothly pass through the through hole 32 to form a threaded engagement with the component to be connected, while the head of the screw 421 can be completely embedded in the groove 33, achieving a flush fit with the outer surface of the protrusion 31 without any outward protrusion. This ensures the firmness of the connection structure and maintains a flat and simple overall appearance.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-wear variable speed flywheel, characterized in that, include: The first flywheel (1), the second flywheel (2), and the third flywheel (3) are detachably connected. The second flywheel (2) includes multiple independent flywheel plates of different diameters. The connector (4) includes a first connecting part (41) and a second connecting part (42). The first connecting part (41) is inserted into and connected in series with the first flywheel (1), the second flywheel (2) and the third flywheel (3). The second connecting part (42) is detachably connected to the first connecting part (41).

2. The low-wear variable speed flywheel according to claim 1, characterized in that: The first connecting part (41) includes a bonding ring (411), and a plurality of inserts (412) are fixed on one side of the bonding ring (411) in a ring array; The inner walls of the first flywheel (1), the second flywheel (2) and the third flywheel (3) are all arranged in a ring array with multiple slots (5), and the insert (412) is inserted into the slot (5).

3. The low-wear variable speed flywheel according to claim 2, characterized in that: The internal width of the slot (5) is greater than the width at the external port.

4. The low-wear variable speed flywheel according to claim 2, characterized in that: The second connecting part (42) includes a plurality of screws (421), and each of the inserts (412) has a screw hole (422) at its end. A protrusion (31) is fixed on the inner ring of the third flywheel (3), and the screw (421) passes through the protrusion (31) and is screwed into the screw hole (422).

5. The low-wear variable speed flywheel according to claim 4, characterized in that: The protrusion (31) has a through hole (32), and the outer end of the through hole (32) has a groove (33).

6. The low-wear variable speed flywheel according to claim 1, characterized in that: The second flywheel (2) includes a first flywheel plate (21), a second flywheel plate (22), a third flywheel plate (23), and a fourth flywheel plate (24) with diameters decreasing from large to small.

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