Bicycle freewheel with noise reduction

Abstract

The utility model discloses a bicycle flywheel with noise reduction effect relates to bicycle technical field. The utility model discloses a flywheel main part, and the flywheel main part includes fixed ring, and the fixed ring is opened with the slot in the circumferential array, and the outside coaxial of fixed ring is equipped with the rotary ring, and the inner peripheral wall of rotary ring is uniformly fixed with the ratchet tooth, and the outer peripheral wall of fixed ring is inserted with the telescopic board of the circumferential array with the ratchet tooth cooperation, and the upper wall of telescopic board is equipped with rubber pad, connecting component, including the side cover of being located rotary ring front and rear and with fixed ring coaxial arrangement, and the side cover of being located rear side is fixedly connected with fixed ring, and the inside of slot is equipped with the elastic plate of front end and the side cover of being located front side fixed, and the convex strip of elastic plate rear end is close to the side fixed of side cover outer peripheral wall side, the utility model discloses through rubber pad avoids the impact of telescopic board and ratchet tooth and restrains the noise, reduces the noise pollution, and through the cooperation of elastic plate and convex strip makes the clamping of side cover and flywheel main part, and the dismounting operation between two side covers is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of bicycle technology, and in particular relates to a bicycle flywheel with noise reduction effect. Background Technology

[0002] The bicycle freewheel is located in the rear wheel hub and is responsible for converting the power transmitted by the rider through the pedals into the rotation of the wheel. When the rider starts to pedal, the pedal drives the gears of the freewheel to rotate through the chain, driving the rear wheel forward. When the rider stops pedaling, the clutch in the freewheel will disengage, preventing the power transmission between the pedal and the wheel, thus allowing the wheel to rotate independently, unaffected by the pedals. The main structure that achieves the aforementioned power transmission effect is the combined action of a ratchet and a rotatable pawl. When the rider stops pedaling, the pawl moves relative to the ratchet teeth. This movement causes the pawl and ratchet teeth to collide, resulting in noise pollution from the flywheel. Furthermore, the existing flywheels have detachable side covers threaded onto the flywheel body. The side cover has two symmetrically shaped tapping holes on its side wall. These two tapping holes are used as tapping positions to rotate the side cover, thus enabling its removal and installation. However, this method requires external tools to remove and install the detachable side cover, making the removal and installation of the flywheel inconvenient.

[0003] To address this issue, we provide a bicycle flywheel with noise reduction capabilities. Utility Model Content

[0004] The purpose of this utility model is to provide a bicycle flywheel with noise reduction effect. It uses a rubber pad to prevent the telescopic plate from colliding with the ratchet teeth, thus suppressing noise. Furthermore, the combination of the elastic plate and the convex strip allows the side cover to be engaged with the flywheel body. This solves the problem that existing flywheels cause noise pollution when the pawl and ratchet teeth move relative to each other. In addition, the existing technology requires external tools to disassemble and assemble the detachable side cover, making the disassembly and assembly of the flywheel inconvenient.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a bicycle flywheel with noise reduction effect, comprising a flywheel body, a fixed ring, and through slots arranged in a circular array on the fixed ring. A rotating ring is coaxially arranged on the outside of the fixed ring, and ratchet teeth are evenly fixed on the inner circumferential wall of the rotating ring. A telescopic plate that engages with the ratchet teeth is inserted into the outer circumferential wall of the fixed ring in a circular array, and a rubber pad is provided on the upper wall of the telescopic plate. A connecting assembly includes side covers located in front of and behind the rotating ring and coaxially arranged with the fixed ring. The side cover located on the rear side is fixedly connected to the fixed ring. An elastic plate with its front end fixed to the side cover located on the front side is provided inside the through slots, and a protrusion is fixed on the rear end of the elastic plate near the outer circumferential wall of the side cover.

[0006] The present invention is further configured such that the telescopic plate is provided with a guide rod fixed to the fixing ring inside, the lower wall of the telescopic plate is provided with a spring whose lower end abuts against the fixing ring, and the lower wall of the rubber pad is provided with a rubber plug that is interference-fitted with the telescopic plate.

[0007] The present invention is further configured such that a toothed disc is fixed on the outer peripheral wall of the rotating ring.

[0008] The present invention is further configured such that a semi-circular groove one and a semi-circular groove two are respectively provided on the side wall of the rotating ring near the side cover and the side wall of the side cover near the rotating ring, and a ball bearing is provided between the semi-circular groove one and the semi-circular groove two.

[0009] The present invention is further configured such that a rectangular groove is provided on the rear wall of the side cover located at the position of the protrusion.

[0010] The present invention is further configured such that an insert plate is inserted into the interior of the rear end of the elastic plate, and a protrusion is fixed on one side of the insert plate, and a limiting groove is formed at the location of the protrusion corresponding to the side wall of the elastic plate.

[0011] The present invention is further configured such that a boss is fixedly provided at the rear end of the insert plate, and elastic pads are fixedly provided at both ends of the boss, and the elastic pads are interference fit with the side cover located on the rear side.

[0012] This utility model has the following beneficial effects: 1. This utility model, by setting a rubber pad, ensures that when the user stops pedaling, both the chain and the chainring stop moving, causing the ratchet to stop moving as well. At this time, the inertial retaining ring rotates clockwise with the flywheel shaft, thereby driving the telescopic plate to rotate clockwise. During the above process, the telescopic plate reciprocates within the retaining ring under the action of the ratchet. When the telescopic plate extends, the rubber pad contacts the ratchet, suppressing the noise generated by the collision between the telescopic plate and the ratchet. This solves the problem of noise pollution caused by the relative movement of the pawl and ratchet in existing flywheels.

[0013] 2. This utility model, by setting an elastic plate and a protruding strip, allows the elastic plate to pass through the through groove by operating the side cover located on the front side, and the protruding strip to fasten it to the side cover located on the rear side, thus realizing the installation between the two side plates. By operating the protrusion to move towards the fixing ring, and then operating the two side covers to separate, the side covers can be removed. No external auxiliary tools are required for disassembly, making the removal of the side covers more convenient. This solves the problem in the prior art that requires external tools to disassemble and assemble the detachable side covers, which makes the disassembly and assembly of the flywheel inconvenient. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0015] Figure 1This is a structural diagram of a bicycle flywheel with noise reduction effect.

[0016] Figure 2 This is a vertical sectional view of the flywheel body.

[0017] Figure 3 This is a diagram of the internal structure of the flywheel body.

[0018] Figure 4 This is an exploded view of a bicycle flywheel with noise reduction capabilities.

[0019] Figure 5 This is a partial structural diagram of the connecting components.

[0020] Figure 6 This is a diagram showing the connection structure between the elastic plate and the insert plate.

[0021] The attached diagram lists the components represented by each number as follows: 1-Flywheel body, 101-Rotating ring, 101a-Ratchet, 101b-Chain, 101c-Semicircular groove one, 102-Fixing ring, 102a-Through groove, 102b-Guide rod, 103-Spring, 104-Telescopic plate, 105-Rubber pad, 105a-Rubber plug, 106-Ball, 2-Connecting assembly, 201-Elastic plate, 201a-Limiting groove, 201b-Protrusion, 202-Side cover, 202a-Semicircular groove two, 202b-Rectangular groove, 203-Insertion plate, 203a-Protrusion, 204-Boss, 204a-Elastic pad. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Example 1 Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 This is the first embodiment of the present invention, which provides a bicycle flywheel with noise reduction effect, including a flywheel body 1. The flywheel body 1 includes a fixing ring 102, which is fixed to the outside of the flywheel shaft. The fixing ring 102 has through slots 102a arranged in a circular array on it, which communicate with rectangular slots 202b. The through slots 102a provide a through space for an elastic plate 201. A rotating ring 101 is coaxially arranged on the outside of the fixing ring 102. The inner peripheral wall of the rotating ring 101 is uniformly fixed with ratchet teeth 101a. A telescopic plate 104 that cooperates with the ratchet teeth 101a is inserted into the outer peripheral wall of the fixing ring 102 in a circular array. The telescopic plate 104 is clearance-fitted with the fixing ring 102. At the same time, in order to ensure the durability of the telescopic plate 104, the telescopic plate 104 is made of a high-hardness wear-resistant material, and as... Figure 2 As shown, the height of the clockwise sidewall of the telescopic plate 104 is less than the height of the counterclockwise sidewall of the telescopic plate 104, so that the end of the telescopic plate 104 near the ratchet 101a is an inclined surface. This inclined surface allows the fixed ring 102 to still rotate when the rotating ring 101 rotates counterclockwise relative to the fixed ring 102. The upper wall of the telescopic plate 104 is provided with a rubber pad 105 to prevent the telescopic plate 104 from colliding with the ratchet 101a and producing noise, thereby suppressing the noise. For some users who can tolerate the noise, the rubber pad 105 can be removed. Specifically, the telescopic plate 104 has a guide rod 102b fixed to the fixing ring 102 inside, which provides a guiding effect for the telescopic movement of the telescopic plate 104. The lower wall of the telescopic plate 104 has a spring 103 with its lower end abutting against the fixing ring 102, which provides support for the telescopic plate 104, so that the telescopic plate 104 can reciprocate and extend. The lower wall of the rubber pad 105 is fixed with a rubber plug 105a that is interference-fitted with the telescopic plate 104. The rubber plug 105a fixes the rubber pad 105 to the telescopic plate 104. The rubber pad 105 can be disassembled by removing the rubber plug 105a from the telescopic plate 104. A toothed disc 101b is fixedly mounted on the outer peripheral wall of the rotating ring 101. In use, a chain is fitted to the outside of the toothed disc 101b. The rotating ring 101 has a semi-circular groove 101c and a semi-circular groove 202a respectively on the side wall of the side cover 202 and the side wall of the side cover 202 near the rotating ring 101. A ball 106 is provided between the semi-circular groove 101c and the semi-circular groove 202a. The above arrangement uses the semi-circular groove 101c and the semi-circular groove 202a to limit the ball 106, while allowing the rotating ring 101 to rotate relative to the original position of the fixed ring 102. The operation process of this embodiment is as follows: When the rider pedals during riding, the power is transmitted to the chain, which drives the chainring 101b to rotate, causing the rotating ring 101 to rotate clockwise. Since the telescopic plate 104 extends out and is in the clockwise movement trajectory of the ratchet 101a, when the rotating ring 101 rotates, it drives the telescopic plate 104 to rotate, thereby driving the fixed ring 102 to rotate, and finally driving the rear wheel to rotate. When the rider applies force by pedaling, causing the rotational speed of the rotating ring 101 to be less than that of the fixed ring 102, the fixed ring 102 rotates clockwise relative to the rotating ring 101. In this state, the telescopic plate 104 moves relative to the ratchet 101a. During this process, with the cooperation of the spring 103, the telescopic plate 104 reciprocates within the fixed ring 102. When the telescopic plate 104 extends, it drives the rubber pad 105 to move and collide with the ratchet 101a, thereby achieving the effect of noise suppression using the rubber pad 105.

[0024] Example 2 Please see Figure 1 , Figure 4 , Figure 5 and Figure 6 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but differs from the first embodiment in that: the connecting component 2 includes side covers 202 disposed in front of and behind the rotating ring 101 and coaxially disposed with the fixed ring 102. The side cover 202 located on the rear side is fixedly connected to the fixed ring 102. The interior of the through groove 102a is provided with an elastic plate 201 whose front end is fixed to the side cover 202 located on the front side. The deformable characteristics of the elastic plate 201 are utilized so that the elastic plate can be blocked by the protrusion 201b. 201 can still be inserted into the through slot 102a. A protrusion 201b is fixed on the side of the elastic plate 201 near the outer peripheral wall of the side cover 202. The cooperation between the protrusion 201b and the elastic plate 201 makes the two side covers 202 fixed by snap-fit. The cross section of the protrusion 201b is set as a right triangle. The two side covers 202 are fixed relative to each other by using a right angle surface of the protrusion 201b to fit against the side wall of the side cover 202 located on the rear side at the position of the rectangular slot 202b. Specifically, a rectangular groove 202b is provided on the rear wall of the side cover 202 located at the position of the protrusion 201b. Two fingers can be inserted into the rectangular groove 202b to operate the protrusion 204 and pull out the insert plate 203. An insert plate 203 is inserted into the rear end of the elastic plate 201. A protrusion 203a is fixed on one side of the insert plate 203. A limiting groove 201a is formed at the position of the protrusion 203a corresponding to the side wall of the elastic plate 201. The cooperation between the protrusion 203a and the limiting groove 201a can limit the movement distance of the insert plate 203 and prevent the insert plate 203 from separating from the elastic plate 201. After the insert plate 203 is pulled out, a force is applied to the boss 204 toward the middle position of the fixing ring 102 to make the protrusion 201b separate from the side cover 202 located on the rear side. By operating the side cover 202 located on the front side away from the side cover 202 located on the rear side, the two side covers 202 can be disassembled. The rear end of the insert plate 203 is fixedly provided with a boss 204, and both ends of the boss 204 are fixedly provided with elastic pads 204a. The elastic pads 204a are interference-fitted with the side cover 202 located on the rear side, so that there is a certain resistance to pulling out the boss 204. This resistance can prevent the insert plate 203 from accidentally coming out during use. The operation process of this embodiment is as follows: When disassembling the two side covers 202, by inserting two fingers into the rectangular groove 202b and pinching the boss 204 and pulling the boss 204 outward, under the characteristic that the elastic plate 201 has the ability to deform, all the bosses 204 are moved closer to each other and disengaged from the side cover 202 located on the rear side. At this time, the side cover 202 located on the front side is pulled forward to make the two side covers 202 move away from each other, so that the two side covers 202 can be disassembled. When installing the two side covers 202, the rear side cover 202 is placed flat on the operating platform, and an appropriate amount of ball bearings 106 are placed in the semi-circular groove 202a on the rear side. The rotating ring 101 is positioned above the ball bearings 106, so that the ball bearings 106 are located in the semi-circular groove 101c and semi-circular groove 202a on the rear side of the rotating ring 101. At this time, the rubber pad 105 is operated to insert the rubber plug 105a into one end of the inclined surface of the telescopic plate 104, and then the spring 103 is operated. The guide rod 102b is sleeved on the outside. Then, the inclined end of the telescopic plate 104 is inserted into the outside of the guide rod 102b with one end facing outward. Then, the fixing ring 102 is inserted into the inside of the rotating ring 101. Next, the ball bearing 106 is placed in the semi-circular groove 101c opened on the front wall of the rotating ring 101. Then, the side cover 202 located on the front side is operated to insert the elastic plate 201 into the through groove 102a until the two side covers 202 are fixed relative to each other under the action of the protrusion 201b.

[0025] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example 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.

Claims

1. A bicycle freewheel having a noise reduction effect, comprising a freewheel body (1), characterized in that: The flywheel body (1) includes a fixed ring (102), on which through slots (102a) are arranged in a circular array. A rotating ring (101) is coaxially arranged on the outside of the fixed ring (102). Ratchets (101a) are uniformly fixed on the inner peripheral wall of the rotating ring (101). A telescopic plate (104) that cooperates with the ratchet (101a) is inserted into the outer peripheral wall of the fixed ring (102) in a circular array. A rubber pad (105) is provided on the upper wall of the telescopic plate (104). The connecting assembly (2) includes a side cover (202) located in front of and behind the rotating ring (101) and coaxially arranged with the fixed ring (102). The side cover (202) located on the rear side is fixedly connected to the fixed ring (102). The groove (102a) is provided with an elastic plate (201) whose front end is fixed to the side cover (202) located on the front side. A protrusion (201b) is fixed on the side of the elastic plate (201) near the outer peripheral wall of the side cover (202) at the rear end.

2. A bicycle flywheel with noise reduction effect according to claim 1, characterized in that: The telescopic plate (104) is provided with a guide rod (102b) fixed to the fixed ring (102) inside. The lower wall of the telescopic plate (104) is provided with a spring (103) whose lower end abuts against the fixed ring (102). The lower wall of the rubber pad (105) is provided with a rubber plug (105a) that is interference-fitted with the telescopic plate (104).

3. The bicycle freewheel with noise reduction effect according to claim 1, characterized in that: The outer peripheral wall of the rotating ring (101) is fixed with a toothed disc (101b).

4. A bicycle freewheel having a noise reduction effect according to claim 3, characterized in that: The rotating ring (101) has a semi-circular groove one (101c) and a semi-circular groove two (202a) respectively on the side wall of the side cover (202) and the side wall of the side cover (202) near the rotating ring (101), and a ball bearing (106) is provided between the semi-circular groove one (101c) and the semi-circular groove two (202a).

5. The bicycle freewheel with noise reduction effect according to claim 1, characterized in that: A rectangular groove (202b) is provided on the rear wall of the side cover (202) located at the position of the protrusion (201b).

6. The bicycle freewheel with noise reduction effect according to claim 1, characterized in that: An insert plate (203) is inserted into the rear end of the elastic plate (201). A protrusion (203a) is fixed on one side of the insert plate (203), and a limiting groove (201a) is formed on the side wall of the elastic plate (201) at the location of the protrusion (203a).

7. A bicycle freewheel having a noise reduction effect according to claim 6, characterized in that: The rear end of the insert plate (203) is fixedly provided with a boss (204), and both ends of the boss (204) are fixedly provided with elastic pads (204a). The elastic pads (204a) are interference-fitted with the side cover (202) located on the rear side.

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