Belt flywheel for bicycle
By adopting support frames, fixing rods, fixing frames and fixing plates in the bicycle belt flywheel, the problem of structural strength reduction caused by hollow grooves is solved, and higher structural strength and stability are achieved, while maintaining a lighter weight.
Patent Information
- Application Number
- CN202421545415.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-07-02
AI Technical Summary
In order to reduce weight, existing bicycle belt flywheels will open multiple hollow grooves on the flywheel, resulting in a reduction in the strength of the flywheel structure.
A bicycle belt flywheel is designed, adopting a structure such as support frame, fixing rod, fixing frame and fixing plate. Through the combination and connection of these components, the force is uniformly transmitted, the local structural instability is avoided, and the weight is reduced through aluminum alloy material.
Through this design, the structural strength and stability of the flywheel can be improved while maintaining a lighter weight, avoiding structural weakening caused by hollow grooves.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of belt flywheels, in particular to a belt flywheel for a bicycle. Background Art
[0002] The bicycle belt freewheel is an innovative bicycle transmission system that uses a flexible belt instead of a traditional metal chain. This freewheel is designed to provide a smoother, quieter and low-maintenance riding experience.
[0003] When a conventional bicycle is in motion, the pedals need to be stepped on to drive the sprocket on one side to rotate, and then the belt is driven to rotate, thereby driving the flywheel to rotate. However, the belt flywheel is a solid structure. In order to reduce the weight, a plurality of hollow grooves are opened on the flywheel, which reduces the strength of the flywheel structure. Therefore, a belt flywheel for a bicycle is proposed to solve the above problem. Utility Model Content
[0004] In order to make up for the above shortcomings, the utility model provides a belt flywheel for a bicycle, aiming to improve the problem in the prior art that a plurality of hollow grooves are opened on the flywheel in order to reduce weight, thereby reducing the structural strength of the flywheel.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a belt flywheel for a bicycle, comprising a sprocket, a support frame is arranged inside the sprocket, a fixing rod is fixedly connected to the inside of the support frame, the fixing rod passes through the support frame, the front and rear sides of the inside of the sprocket are slidably connected to the fixing frame, the inside of the fixing frame is fixedly connected to the fixing plate, through holes are opened on both sides of the support frame, and the outer side of the fixing rod is located inside the two through holes.
[0006] As a further description of the above technical solution:
[0007] Two fixing plates are provided, and the two fixing plates are cross-distributed. A clamping groove is opened in the middle of the two fixing plates, and one end of the fixing rod is located inside the clamping groove.
[0008] As a further description of the above technical solution:
[0009] A first groove is formed inside the sprocket, and the support frame and the fixing rod are both located inside the first groove.
[0010] As a further description of the above technical solution:
[0011] Second grooves are provided on the front and rear sides of the sprocket, and the two fixing frames are respectively located inside the two second grooves.
[0012] As a further description of the above technical solution:
[0013] A bolt is threadedly connected to the front side of the fixing frame, and one end of the bolt is threadedly connected to the inside of the sprocket.
[0014] As a further description of the above technical solution:
[0015] A threaded hole is provided on the front side of the fixing frame, a threaded groove is provided inside the sprocket, and the bolt is located inside the threaded hole and the threaded groove.
[0016] As a further description of the above technical solution:
[0017] The top and bottom surfaces of the support frame are both fixedly connected with slide plates, the middle parts of the top and bottom surfaces of the first groove are both provided with slide grooves, and the two slide plates are respectively located inside the two slide grooves.
[0018] As a further description of the above technical solution:
[0019] The support frame, the fixing rod, the fixing frame and the fixing plate are all made of aluminum alloy.
[0020] The utility model has the following beneficial effects:
[0021] 1. In the utility model, the force can be evenly transmitted to the whole structure through the support frame, thus avoiding structural instability or damage caused by excessive local force. The support frame can be prevented from deformation and distortion through the fixing rod. One end of the fixing rod is in the slot opened in the middle of the two fixing plates. At this time, the two fixing plates can support the fixing rod, thereby increasing the strength and stability of the structure.
[0022] 2. In the utility model, the fixing frame and the fixing plate on one side can be removed by bolts, so that the support frame can be pulled, and the slide plate can slide inside the slide groove, so that the support frame can be replaced, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is an overall structural diagram of a bicycle belt flywheel proposed by the utility model;
[0024] Figure 2 This is a partial structural cross-sectional view of a sprocket of a bicycle belt flywheel proposed by the utility model;
[0025] Figure 3 This is a schematic diagram of the partial structure of a sprocket of a bicycle belt flywheel proposed by the utility model;
[0026] Figure 4 The utility model is a schematic diagram of a support frame structure of a bicycle belt flywheel.
[0027] Legend:
[0028] 1. Sprocket; 2. Support frame; 3. Fixed rod; 4. Fixed frame; 5. Fixed plate; 6. Through hole; 7. Card slot; 8. First groove; 9. Second groove; 10. Bolt; 11. Threaded hole; 12. Threaded groove; 13. Slide groove; 14. Slide plate. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the specification of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] Reference Figure 1 , Figure 2 and Figure 4 The utility model provides an embodiment: a belt flywheel for a bicycle, comprising a sprocket 1, a support frame 2 is arranged inside the sprocket 1, a fixing rod 3 is fixedly connected inside the support frame 2, the fixing rod 3 passes through the support frame 2, a fixing frame 4 is slidably connected to the front and rear sides of the sprocket 1, a fixing plate 5 is fixedly connected to the inside of the fixing frame 4, through holes 6 are opened on both sides of the support frame 2, and the outer sides of the fixing rod 3 are inside the two through holes 6.
[0031] Reference Figure 4 Two fixing plates 5 are provided, and the two fixing plates 5 are cross-distributed, a slot 7 is provided in the middle of the two fixing plates 5, and one end of the fixing rod 3 is located inside the slot 7. The stability of the reinforcing structure of the fixing plates 5 can be enhanced by the cross-distribution of the two fixing plates 5, and the fixing rod 3 and the support frame 2 can be fixed by the fixing rod 3 being in the slot 7.
[0032] When in use, the support frame 2 can be fixed by the fixing rod 3, and then the support frame 2 and the fixing rod 3 are placed inside the first groove 8, and the slide plate 14 is respectively placed in the two slide grooves 13, and then the two fixing plates 5 are cross-distributed and fixed inside the fixing frame 4, and then the fixing frame 4 and the fixing plate 5 are placed in the second groove 9, and one end of the fixing rod 3 is placed in the slot 7 opened in the middle of the two fixing plates 5. When the sprocket 1 is subjected to gravity, the fixing rod 3 can prevent the support frame 2 from being deformed. At this time, the two fixing plates 5 can also support the fixing rod 3 to increase the strength and stability of the structure. Then, the bolt 10 is rotated to fix the fixing frame 4 and the sprocket 1 together. When the support frame 2 needs to be replaced, only the bolt 10 needs to be removed, so that the fixing frame 4 and the fixing plate 5 on one side can be removed, and then the support frame 2, the slide plate 14 and the fixing rod 3 are pulled to move, so that the support frame 2 can be easily replaced.
[0033] Reference Figure 2 and Figure 3 The sprocket 1 has a first groove 8 formed inside, and the support frame 2 and the fixing rod 3 are both inside the first groove 8. The sprocket 1 has second grooves 9 formed on the front and rear sides inside, and the two fixing frames 4 are respectively inside the two second grooves 9. The first groove 8 can be used to limit and fix the support frame 2 and the fixing rod 3. The second groove 9 can be used to fix and limit the fixing frame 4 to prevent the fixing frame 4 from displacement.
[0034] Reference Figure 3 and Figure 4 The front side of the fixing frame 4 is threadedly connected with a bolt 10, and one end of the bolt 10 is threadedly connected to the inside of the sprocket 1. A threaded hole 11 is provided on the front side of the fixing frame 4, and a threaded groove 12 is provided inside the sprocket 1, and the bolt 10 is located inside the threaded hole 11 and the threaded groove 12. The fixing frame 4 and the sprocket 1 can be fixed together by the bolt 10. By having the bolt 10 located inside the threaded hole 11 and the threaded groove 12, it can be more convenient and quick when fixing the fixing frame 4, saving time and effort.
[0035] Reference Figure 3 and Figure 4 The top and bottom surfaces of the support frame 2 are fixedly connected with a slide plate 14, and the middle parts of the top and bottom surfaces of the first groove 8 are provided with a slide groove 13, and the two slide plates 14 are respectively located inside the two slide grooves 13. The support frame 2 can be fixed by the slide plate 14, and the slide plate 14 can be fixed and limited by the slide groove 13 to prevent the slide plate 14 from moving.
[0036] Reference Figure 4 The support frame 2, the fixing rod 3, the fixing frame 4 and the fixing plate 5 are all made of aluminum alloy. The support frame 2, the fixing rod 3, the fixing frame 4 and the fixing plate 5 are all made of aluminum alloy. Aluminum alloy has a lower density and is therefore lighter, which helps to reduce the weight of the sprocket 1. Aluminum alloy has better strength and better corrosion resistance.
[0037] Working principle: When in use, first pass the fixing rod 3 through the two through holes 6 to penetrate the support frame 2, so as to fix the support frame 2, and then place the support frame 2 and the fixing rod 3 inside the first groove 8, so that the slide plates 14 on the top and bottom surfaces of the support frame 2 are respectively in the slide grooves 13 on the top and bottom surfaces of the first groove 8, and then the two fixing plates 5 are cross-distributed and fixed inside the fixing frame 4, and then the fixing frame 4 and the fixing plate 5 are placed in the second groove 9 opened inside the sprocket 1, and one end of the fixing rod 3 is in the card groove 7 opened in the middle of the two fixing plates 5. When the sprocket 1 is subjected to gravity, it will cause the support frame 2 to extend to both sides, and at this time the fixing rod 3 can avoid In order to prevent the support frame 2 from being severely deformed and twisted, one end of the fixing rod 3 is in the slot 7 opened in the middle of the two fixing plates 5. At this time, the two fixing plates 5 can also support the fixing rod 3. The two fixing rods 3 are cross-distributed to increase the strength and stability of the structure. Then, the bolt 10 is rotated to fix the fixing frame 4 and the sprocket 1 together. When the support frame 2 needs to be replaced, it is only necessary to rotate the bolt 10 and remove the bolt 10, so that the fixing frame 4 and the fixing plate 5 on one side can be removed, and then the support frame 2 is pulled to make the slide plate 14 slide inside the slide groove 13, thereby driving the fixing rod 3 to move, so that the support frame 2 can be easily replaced.
[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A bicycle belt flywheel, comprising a sprocket (1), characterized in that: A support frame (2) is arranged inside the sprocket (1), a fixing rod (3) is fixedly connected inside the support frame (2), and the fixing rod (3) passes through the support frame (2). A fixing frame (4) is slidably connected to the front and rear sides of the sprocket (1), and a fixing plate (5) is fixedly connected to the inside of the fixing frame (4). Through holes (6) are provided on both sides of the support frame (2), and the outer sides of the fixing rod (3) are located inside the two through holes (6).
2. A bicycle belt flywheel according to claim 1, characterized in that: Two fixing plates (5) are provided, and the two fixing plates (5) are cross-distributed. A clamping groove (7) is provided in the middle of the two fixing plates (5), and one end of the fixing rod (3) is located inside the clamping groove (7).
3. A bicycle belt flywheel according to claim 1, characterized in that: A first groove (8) is provided inside the sprocket (1), and the support frame (2) and the fixing rod (3) are both located inside the first groove (8).
4. A bicycle belt flywheel according to claim 1, characterized in that: Second grooves (9) are provided on the front and rear sides of the sprocket (1), and the two fixing frames (4) are respectively located inside the two second grooves (9).
5. A bicycle belt flywheel according to claim 1, characterized in that: A bolt (10) is threadedly connected to the front side of the fixing frame (4), and one end of the bolt (10) is threadedly connected to the inside of the sprocket (1).
6. A bicycle belt flywheel according to claim 5, characterized in that: A threaded hole (11) is provided on the front side of the fixing frame (4), a threaded groove (12) is provided inside the sprocket (1), and the bolt (10) is located inside the threaded hole (11) and the threaded groove (12).
7. A bicycle belt flywheel according to claim 3, characterized in that: The top and bottom surfaces of the support frame (2) are both fixedly connected with a slide plate (14), the middle parts of the top and bottom surfaces of the first groove (8) are both provided with a slide groove (13), and the two slide plates (14) are respectively located inside the two slide grooves (13).
8. The bicycle belt flywheel according to claim 1, characterized in that: The support frame (2), the fixing rod (3), the fixing frame (4) and the fixing plate (5) are all made of aluminum alloy.