Buckle mechanism for flower drum

Abstract

This invention provides a fastening mechanism for a hub, comprising a hub body; a spring disposed at the end of the hub body; hub base keys distributed non-equidistantly on the outer periphery of the hub body, forming grooves on the hub base keys; a hoop body, a reinforcing hoop disposed on the hoop body, and a snap-fit ​​structure disposed on the reinforcing hoop, wherein the snap-fit ​​structure snaps into the hub base keys to enhance the radial support of the hub base keys. This invention, through the synergistic effect of mechanical interlocking and elastic buffering, enables quick assembly and disassembly without the use of special tools, greatly improving ease of use, while ensuring stability and durability under high load conditions.

Description

Technical Field

[0001] This utility model relates to a buckle mechanism for a flower drum. Background Technology

[0002] As a core transmission component of the bicycle freewheel system, the freehub's structural strength, wear resistance, and assembly stability directly affect transmission efficiency and lifespan. Traditional freehubs typically consist of a freehub body, a connector, and connecting structures. For example, Chinese patent CN202320660793.4 discloses a freehub reinforcement structure that reduces wear on the freehub key by adding a reinforcing hoop between the freehub body and the connector, utilizing high-hardness reinforcing ribs. However, existing technologies still have the following drawbacks: the freehub key and reinforcing ribs are only planarly attached, making them prone to lateral displacement under high torque loads, leading to accelerated keyway wear. Furthermore, existing reinforcing ribs are mostly solid structures, significantly increasing weight and affecting high-speed riding efficiency. Utility Model Content

[0003] This utility model provides a buckle mechanism for a flower drum, which can effectively solve the above problems.

[0004] This utility model is implemented as follows:

[0005] A hub buckle mechanism, including

[0006] The basic structure of the tower;

[0007] Springs are provided at the ends of the tower base;

[0008] The base keys are distributed non-equidistantly on the outer periphery of the base body, forming grooves on the base keys;

[0009] The hoop body, the reinforcing hoop set on the hoop body, and the snap-fit ​​structure set on the reinforcing hoop, wherein the snap-fit ​​structure snaps with the tower base key to enhance the radial support of the tower base key.

[0010] The beneficial effects of this utility model are:

[0011] (1) The springs set at the ends of the tower base provide a stable axial preload, ensuring the tightness of the initial assembly of the mechanism; the non-equidistant tower base key and its groove design effectively destroy the resonance frequency, significantly reducing vibration and noise during high-speed operation; the reinforcing hoop and its snap-fit ​​structure on the hoop body greatly enhance the radial support strength of the tower base key through precise snap-fit ​​with the tower base key, effectively dispersing the load transmitted by the flywheel; the split design of the hoop body, combined with the adjustable micro-set screw, realizes the self-compensation function of wear gap, extending the maintenance cycle; at the same time, the honeycomb weight reduction structure inside the reinforcing hoop achieves a significant weight reduction effect while ensuring sufficient strength; the entire mechanism can be quickly disassembled and assembled without the use of special tools through the synergistic effect of mechanical interlocking and elastic buffering, greatly improving the convenience of use, while ensuring stability and durability under high load conditions. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is the front view of this utility model.

[0014] Figure 2 This is a schematic diagram of the basic structure of the tower of this utility model.

[0015] Figure 3 This is a schematic diagram showing the unfolded structure of the tower body and the nylon elastic ring of this utility model.

[0016] Figure 4 This is an exploded view of this utility model.

[0017] Figure 5 This is a schematic diagram illustrating the use of the tower base key and reinforcing hoop of this utility model.

[0018] Figure 6 This is a schematic diagram of the internal structure of the reinforcing hoop of this utility model.

[0019] Explanation of icon numbers:

[0020] 10. The tower's basic structure; 20. The spring;

[0021] 30. Tower base key; 300. Groove;

[0022] 40. Annular insertion part; 50. Annular groove; 60. Nylon elastic ring; 70. Outer ring;

[0023] 80. Hoop body; 800. Reinforcing hoop; 802. Snap-fit ​​end; 806. Elastic hook; 8060. Arc-shaped part; 8062. Parallel part;

[0024] 90. Installation slot; 110. Honeycomb-shaped weight reduction cavity. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0026] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] Reference Figure 1-6 As shown, a buckle mechanism for a hub includes...

[0028] Tower base 10;

[0029] Spring 20 is located at the end of the tower body 10. Spring 20 is a stainless steel wave spring with a pre-compression of 2mm, providing an axial preload of 50-80N to ensure that the hoop 80 and the outer ring 70 fit tightly during initial assembly.

[0030] The base keys 30 are distributed non-equidistantly on the outer periphery of the base body 10, forming grooves 300 on the base keys 30; the base keys 30 are asymmetrically distributed at 110°-120°-130°, and the spacing between adjacent base keys 30 has a tolerance of ±2°, which can disrupt the resonant frequency and reduce vibration noise during high-speed riding.

[0031] The hoop 80 includes a reinforcing hoop 800 mounted on it, and a snap-fit ​​structure mounted on the reinforcing hoop 800. The snap-fit ​​structure snaps into the base key 30 to enhance the radial support of the base key 30. The hoop 80 is a split structure, including at least two symmetrical semi-rings, with the hoop diameter adjusted between the semi-rings by micro-set screws. The snap-fit ​​structure includes symmetrically arranged elastic hooks 806, which have: an arc-shaped portion 8060 for guiding the hook into the groove 300; and a parallel portion 8062 for fitting and limiting against the side wall of the groove 300.

[0032] The tower body 10 is also provided with an outer ring 70 at its end, and an installation slot 90 is formed on the outer ring 70. One end of the reinforcing hoop 800 is provided with a snap-fit ​​end 802. The snap-fit ​​end 802 is movable (similar to a joint structure), so it can pass smoothly through the installation slot (90).

[0033] An annular insertion portion 40 is provided at the end of the tower body 10 and inside the outer ring 70, and an annular groove 50 is formed at the end of the tower body 10 and outside the annular insertion portion 40.

[0034] A nylon elastic ring 60 is embedded inside the annular groove 50 to buffer axial vibration.

[0035] The interior of the reinforcing hoop 800 has a honeycomb-shaped weight-reducing cavity 110.

[0036] The ratio of the thickness of the base key 30 to the thickness of the parallel portion 8062 of the elastic hook 806 is 1:1.2-1.5.

[0037] Working principle: When the tower base 10 is assembled with the outer ring 70 through the annular insertion part 40 at its end, the spring 20 set at the end of the tower base 10 provides preload force. At the same time, the hoop 80 adjusts the hoop diameter through its split structure with micro-set screws, so that the arc-shaped part 8060 of the elastic hook 806 on the reinforcing hoop 800 is guided into the groove 300 of the tower base key 30 with non-equidistant distribution of 110°-120°-130°. The parallel part 8062 fits tightly with the side wall of the groove 300 to form radial support. The nylon elastic ring 60 embedded in the annular groove 50 absorbs axial vibration, while the honeycomb weight reduction cavity 110 inside the reinforcing hoop 800 achieves weight reduction while ensuring structural strength. Finally, the optimized stress transfer is achieved by matching the thickness of the tower base key 30 and the elastic hook 806 at a ratio of 1:1.2-1.5, thus completing the stable locking and vibration suppression of the entire buckling mechanism.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A buckle mechanism for a flower drum, characterized in that, include Tower basic structure (10); A spring (20) is provided at the end of the tower body (10); The base key (30) is distributed non-equidistantly on the outer periphery of the base body (10), forming grooves (300) on the base key (30). The hoop (80), the reinforcing hoop (800) provided on the hoop (80), and the snap-fit ​​structure provided on the reinforcing hoop (800), wherein the snap-fit ​​structure is snapped with the tower base key (30) to enhance the radial support of the tower base key (30).

2. The buckle mechanism for a hub according to claim 1, characterized in that, The snap-fit ​​structure includes symmetrically arranged elastic hooks (806), the elastic hooks (806) having: The arc-shaped portion (8060) is used to guide the insertion into the groove (300). The parallel part (8062) is fitted and limited to the side wall of the groove (300).

3. The buckle mechanism for a hub according to claim 1, characterized in that, The tower body (10) is also provided with an outer ring (70) at its end, and an installation slot (90) is formed on the outer ring (70). One end of the reinforcing hoop (800) is provided with a snap-fit ​​end (802).

4. The buckle mechanism for a hub according to claim 3, characterized in that, An annular insertion portion (40) is provided at the end of the tower body (10) and inside the outer ring (70), forming an annular groove (50) at the end of the tower body (10) and outside the annular insertion portion (40).

5. A buckle mechanism for a hub according to claim 4, characterized in that, The annular groove (50) is fitted with a nylon elastic ring (60) to buffer axial vibration.

6. The buckle mechanism for a hub according to claim 1, characterized in that, The reinforcing hoop (800) has a honeycomb-shaped weight-reducing cavity (110) inside.

7. A buckle mechanism for a hub according to claim 2, characterized in that, The thickness of the base key (30) is in the ratio of 1:1.2-1.5 to the thickness of the parallel portion (8062) of the elastic hook (806).

8. The buckle mechanism for a hub according to claim 1, characterized in that, The hoop (80) is a split structure, comprising at least two symmetrical semi-rings, with the hoop diameter adjusted between the semi-rings by a micro-set screw.

9. A buckle mechanism for a hub according to claim 1, characterized in that, The tower base bond (30) is asymmetrically distributed at 110°-120°-130°, and the spacing between adjacent tower base bonds (30) has a tolerance of ±2°.

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