Rotary flywheel

Abstract

The utility model discloses a rotary flywheel, and relates to the related technical field of bicycle accessories. The rotary flying device comprises a rotary flying body connected with a wheel axle of a rear wheel, the rotary flying body comprises a flywheel shell with a step-shaped outer wall and a plurality of stages of tooth pieces arranged on steps of the flywheel shell, a flying core is sleeved on the inner side of the flywheel shell, the smallest tooth piece in the plurality of stages of tooth pieces is a 13T tooth piece, and the outer wall of the flywheel shell is in a step shape. The inner side of the flywheel shell is further provided with an adapter seat, the adapter seat flywheel is sleeved with a 11T tooth piece, the 11T tooth piece is close to the 13T tooth piece, the inner side of the adapter seat flywheel is provided with a locking piece for limiting the 11T tooth piece in the adapter seat, the 11T tooth piece is arranged outside the locking piece in a sleeving mode, and the 11T tooth piece and the multi-stage tooth piece are arranged in a concentric shaft mode. According to the structure, the rotary flying device can be provided with smaller tooth pieces after the adapter is additionally arranged.

Description

Technical Field

[0001] The utility model belongs to the relevant technical field of bicycle accessories, in particular to a rotary flywheel. Background Art

[0002] Bicycles have evolved from the earliest means of transportation to today's leisure and sports equipment. Customers have higher and higher requirements for bicycles, and there are more and more demands for customization, such as higher and higher requirements for variable-speed bicycles. Existing variable-speed bicycles usually have a multi-stage flywheel, a derailleur and a chain plate connected by a chain, wherein the multi-stage flywheel is connected to the axle of the rear wheel, the derailleur is also located at the rear wheel, and the chain plate is connected to the pedals. When changing speed, pull the derailleur to switch the chain between different teeth of the multi-stage flywheel, forming a variety of transmission ratios to meet different riding scenarios.

[0003] Therefore, in the field of variable-speed bicycles, multi-stage flywheels are more important components. Multi-stage flywheels are divided into two types according to the installation method: ratchet flywheels and swing flywheels. The ratchet of a swing flywheel (that is, the part of the structure that makes the "clicking..." sound when we turn the rear wheel) and the flywheel are integrated. Generally, the flywheel cannot be replaced separately. In addition, due to the shell of the ratchet and technical reasons, the size of the ratchet itself cannot be made too small, which limits the size of the flywheel. Therefore, the smallest tooth of the swing flywheel can only be 13T. The ratchet of the ratchet flywheel and the axle are integrated. This eliminates the structural problem and allows the flywheel size to be made smaller, such as the 11T commonly seen on road flywheels. Since the smaller the speed gear, the more labor-saving the bicycle is, but the existing rotary flywheel cannot reach a minimum of 13T. For example, the patent application number is 202322498596.X, and the patent name is: A rotary multi-stage flywheel for bicycles. The minimum tooth of this structure can only be 13T. Therefore, it is particularly important to make the minimum speed gear 11T without changing the rotary flywheel properties to make the bicycle have a larger gear ratio. Utility Model Content

[0004] The utility model aims to provide a rotary flywheel, which solves the problem that the minimum speed gear of the existing rotary flywheel can only be 13T, and a larger gear ratio of a bicycle cannot be achieved to ensure that the bicycle is more labor-saving.

[0005] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0006] The utility model discloses a rotary flywheel, comprising a rotary flywheel body connected to the axle of a rear wheel, the rotary flywheel body comprising a flywheel shell with a stepped outer wall and a plurality of gear plates arranged on the steps of the flywheel shell, a fly core is sleeved on the inner side of the flywheel shell, wherein the smallest gear plate among the plurality of gear plates is a 13T gear plate, an adapter seat is further arranged on the inner side of the flywheel shell, an 11T gear plate is connected to the outer side of the adapter seat, the 11T gear plate is close to the 13T gear plate, a locking plate for limiting the 11T gear plate in the adapter seat is arranged on the inner side of the adapter seat, the 11T gear plate is sleeved outside the locking plate, and the 11T gear plate and the multi-stage gear plate are arranged with a coaxial axis.

[0007] Preferably, in order to facilitate disassembly, the adapter seat includes a sleeve, an external threaded portion 1 is arranged on the right side of the sleeve, an internal threaded portion 1 threadedly matched with the external threaded portion 1 is arranged on the left side inside the flywheel housing, an internal threaded portion 2 is arranged inside the sleeve, and the locking plate includes a sleeve, and an external threaded portion 2 matching with the internal threaded portion 2 is arranged on the outer side of the sleeve.

[0008] Preferably, in order to improve the limiting effect, a limiting ring 1 is provided on the left side of the sleeve, and a limiting ring 2 is also provided on the outer side of the sleeve. The left side of the 11T tooth piece abuts against the limiting ring 1, and the right side of the 11T tooth piece abuts against the limiting ring 2.

[0009] Preferably, in order to further improve the limiting effect, a limiting groove is provided on the inner side of the 13T tooth plate, and the limiting ring 2 is clamped in the limiting groove.

[0010] Preferably, in order to improve the fixing and limiting effect on the smallest tooth plate, one or more positioning grooves are arranged in a ring shape on the left side of the 13T tooth plate, and one or more clamping blocks are arranged in a ring shape on the right side of the 11T tooth plate, and each clamping block is clamped in a corresponding positioning groove.

[0011] The utility model has the following beneficial effects: the structure increases the thread pattern on the flywheel shell and locks an adapter, so that the 11T small tooth that can only be installed on the card fly can be installed on the swing fly through the adapter, thereby achieving the purpose of the swing fly minimum tooth 11T, so as to make the bicycle have a larger gear ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front structural schematic diagram of a rotary flywheel in Example 1;

[0013] Figure 2 for Figure 1 Schematic diagram of the cross section of AA;

[0014] Figure 3 for Figure 2 A magnified view of point B;

[0015] Figure 4 This is a schematic diagram of the front structure of the locking piece in Example 1;

[0016] Figure 5 is a schematic diagram of a broken line cross section of the locking piece in Example 1;

[0017] Figure 6 This is a schematic diagram of the front structure of the 11T gear piece in Example 1;

[0018] Figure 7 This is a schematic diagram of the back structure of the 11T gear piece in Example 2;

[0019] Figure 8 This is a partial enlarged view of the 13T gear, flywheel housing and adapter after being combined in Example 2.

[0020] Reference numerals:

[0021] The flywheel body 1, the flywheel housing 101, the internal threaded part 1011, the fly core 102, the 13T gear piece 103, the 14T gear piece 1031, the 16T gear piece 1032, the 18T gear piece 1033, the 22T gear piece 1034, the 24T gear piece 1035, the 28T gear piece 1036, the adapter 2, the sleeve 201, the internal threaded part 2011, the limiting ring 2012, the external threaded part 1 202, the 11T gear piece 3, the locking piece 4, the sleeve 401, the external threaded part 4011, the limiting ring 1 4012, the limiting groove 5, the positioning groove 6, and the block 7. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are 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. Example 1

[0023] See also Figure 1-6As shown, a rotary flywheel disclosed in this embodiment includes a rotary flywheel body 1 connected to the axle of the rear wheel, the rotary flywheel body 1 includes a flywheel shell 101 with a stepped outer wall and a plurality of gear plates arranged on the steps of the flywheel shell 101, a fly core 102 is sleeved on the inner side of the flywheel shell 101, wherein the smallest gear plate among the plurality of gear plates is a 13T gear plate 103, an adapter seat 2 is also arranged on the inner side of the flywheel shell 101, an 11T gear plate 3 is connected to the outer side of the adapter seat 2, the 11T gear plate 3 is close to the 13T gear plate 103, a locking plate 4 for limiting the 11T gear plate 3 in the adapter seat 2 is arranged on the inner side of the adapter seat 2, the 11T gear plate 3 is sleeved outside the locking plate 4, and the 11T gear plate 3 and the multi-stage gear plate are arranged as concentric axes.

[0024] Preferably, in order to facilitate disassembly, the adapter 2 includes a sleeve 201, an external threaded portion 202 is arranged on the right side of the sleeve 201, an internal threaded portion 1011 threadably matched with the external threaded portion 202 is arranged on the left side inside the flywheel housing 101, an internal threaded portion 2011 is arranged inside the sleeve 201, and the locking plate 4 includes a sleeve 401, and an external threaded portion 4011 matching with the internal threaded portion 2011 is arranged on the outer side of the sleeve 401.

[0025] Preferably, in order to improve the limiting effect, a limiting ring 4012 is provided on the left side of the sleeve 401, and a limiting ring 2012 is also provided on the outer side of the sleeve 201, the left side of the 11T tooth plate 3 is abutted against the limiting ring 4012, and the right side of the 11T tooth plate 3 is abutted against the limiting ring 2012; in order to further improve the limiting effect, a limiting groove 5 is provided on the inner side of the 13T tooth plate 103, and the limiting ring 2012 is clamped in the limiting groove 5.

[0026] In this embodiment, there are 7 gear pieces at the several levels, which increase in size from left to right, namely 13T gear piece 103, 14T gear piece 1031, 16T gear piece 1032, 18T gear piece 1033, 22T gear piece 1034, 24T gear piece 1035 and 24T gear piece 1036.

[0027] In this embodiment, an adapter seat 2 is connected to the inner side of the flywheel housing 101 by means of a threaded connection, an 11T tooth plate 3 is connected to the outer side of the adapter seat 2, and the 11T tooth plate 3 is fixed on the adapter seat 2 by means of a threaded connection between a locking plate 4 and the adapter seat 2, and the 11T tooth plate 3 is concentrically arranged with the original several levels of tooth plates, thereby finally achieving the installation of the 11T tooth plate 3 on the original flywheel.

[0028] Therefore, this structure increases the thread pattern on the flywheel housing 101 and locks an adapter 2, and the 11T small tooth 3 that can only be installed on the card fly can be installed on the swing fly through the adapter 2, thereby achieving the purpose of the swing fly minimum tooth 11T, so as to make the bicycle have a larger gear ratio. Example 2

[0029] See also Figure 7-8 As shown, a rotary flywheel disclosed in this embodiment is preferably provided with one or more positioning grooves 6 in a ring shape on the left side of the 13T tooth plate 103, and one or more clamping blocks 7 in a ring shape on the right side of the 11T tooth plate 3 in order to improve the fixing and limiting effect on the smallest tooth plate. In this embodiment, four clamping blocks 7 are provided on the 11T tooth plate 3, so four positioning grooves 6 are correspondingly provided on the side of the 13T tooth plate 103, and each clamping block 7 is clamped in a corresponding positioning groove 6. In this embodiment, the cooperation between the clamping block 7 and the positioning groove 6 can realize both the positioning effect of the smallest 11T tooth plate 3 and the alignment and limiting clamping effect.

[0030] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A rotary flywheel, comprising a rotary flywheel body (1) connected to the axle of a rear wheel, the rotary flywheel body (1) comprising a flywheel housing (101) having a stepped outer wall and a plurality of gear pieces arranged on the steps of the flywheel housing (101), a fly core (102) being sleeved on the inner side of the flywheel housing (101), wherein the smallest gear piece among the plurality of gear pieces is a 13T gear piece (103), and characterized in that: an adapter seat (2) is further arranged on the inner side of the flywheel housing (101), an 11T gear piece (3) is connected to the outer side of the adapter seat (2), the 11T gear piece (3) is close to the 13T gear piece (103), a locking piece (4) is arranged on the inner side of the adapter seat (2) for limiting the 11T gear piece (3) in the adapter seat (2), the 11T gear piece (3) is sleeved on the outer side of the locking piece (4), and the 11T gear piece (3) and the multi-stage gear piece are arranged coaxially.

2. A rotary flywheel according to claim 1, characterized in that: The adapter (2) comprises a sleeve (201), an external threaded portion 1 (202) is arranged on the right side of the sleeve (201), an internal threaded portion 1 (1011) threadably matched with the external threaded portion 1 (202) is arranged on the left side inside the flywheel housing (101), an internal threaded portion 2 (2011) is arranged inside the sleeve (201), and the locking plate (4) comprises a sleeve (401), an external threaded portion 2 (4011) matching with the internal threaded portion 2 (2011) is arranged on the outside of the sleeve (401).

3. A rotary flywheel according to claim 2, characterized in that: A first limiting ring (4012) is arranged on the left side of the sleeve (401), and a second limiting ring (2012) is also arranged on the outside of the sleeve (201). The left side of the 11T tooth piece (3) abuts against the first limiting ring (4012), and the right side of the 11T tooth piece (3) abuts against the second limiting ring (2012).

4. A rotary flywheel according to claim 3, characterized in that: A limiting groove (5) is provided on the inner side of the 13T tooth plate (103), and the second limiting ring (2012) is clamped in the limiting groove (5).

5. A rotary flywheel according to claim 1, characterized in that: One or more positioning grooves (6) are arranged in an annular shape on the left side of the 13T tooth plate (103), and one or more clamping blocks (7) are arranged in an annular shape on the right side of the 11T tooth plate (3), and each clamping block (7) is clamped in a corresponding positioning groove (6).

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