Novel noise reduction fluted disc assembly

Abstract

The utility model provides a novel noise reduction fluted disc assembly which comprises a crank, a small tooth piece and a large tooth piece, one end of the crank is provided with a hole used for being connected with a middle shaft, the end face of one end of the crank is provided with a plurality of crank claws in the circumferential direction, and each crank claw is provided with a first installation hole. A plurality of second mounting holes are formed in the end face of one end of the crank and located on the peripheral sides of the multiple crank claws, the small tooth pieces are fixed to the multiple crank claws through the multiple fasteners, and the large tooth pieces are fixed to the end face of one end of the crank through the noise reduction assembly. According to the utility model, the large tooth sheet is fixed on the crank through the noise reduction assembly, so that when speed change is carried out, that is, the chain moves from the small tooth sheet to the large tooth sheet or from the large tooth sheet to the small tooth sheet, the chain is rubbed with the inclined surface of the noise reduction piece, and the noise reduction piece is made of engineering plastic materials, so that the noise reduction piece is not damaged. Therefore, the noise caused by friction can be avoided, the riding experience of a rider is improved, and the practical effect of the automobile seat cushion is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle accessories, in particular to a novel noise-reducing gear disc assembly. Background Art

[0002] A bicycle, also known as a bicycle or a bike, is a green and environmentally friendly means of transportation. The rider uses pedals to drive the wheels, creating a cycle. The main driving mechanism of a bicycle consists of a crank connected to the front sprocket at one end and the pedals at the other. The sprockets on the front sprocket are then connected to the rear sprocket via a chain, allowing the front and rear sprockets to rotate in a chain-driven manner. Therefore, when the rider pedals, the crank rotates the front sprocket, which in turn drives the chain, causing the rear sprocket to rotate in a corresponding manner, thereby driving the rear wheel. However, since the rear sprocket includes multiple teeth of varying diameters arranged in sequence, the gear ratio between the front and rear sprockets can be adjusted according to the rider's needs.

[0003] However, when shifting, the chain tilts at different angles as it moves across the front and rear sprockets. This creates lateral stress on the chain relative to the front and rear sprockets, causing friction between the chain and the sprocket sidewalls. Furthermore, because both the chain and sprockets are made of metal, this friction creates a loud noise, which affects the rider's riding experience. Utility Model Content

[0004] The utility model is developed to solve the above problems, and aims to provide a novel noise-reducing gear disc assembly.

[0005] The utility model provides a novel noise reduction sprocket assembly, comprising a crank, a small tooth piece, and a large tooth piece, having the following characteristics: one end of the crank is provided with a hole for connecting with the middle shaft, a plurality of crank claws are provided on the end surface of one end of the crank and along the circumference, each crank claw is provided with a first mounting hole, a plurality of second mounting holes are provided on the end surface of one end of the crank and on the outer circumference of the plurality of crank claws, the small tooth piece is fixed to the plurality of crank claws by a plurality of fasteners, the large tooth piece is fixed to the end surface of one end of the crank by a noise reduction assembly, the noise reduction assembly comprises a fixing plate, a plurality of mounting members, and a noise reduction member, the fixing plate is annular and is provided on the crank On one end face of the handle, and on the outer peripheral side of multiple crank claws, a through hole is opened on the wall of the fixing plate and at a position corresponding to each second mounting hole. Each mounting piece can pass through a through hole and be locked with the second mounting hole corresponding to the through hole, thereby fixing the fixing plate to the crank. The noise reduction piece is annular, and the inner wall of the noise reduction piece is connected to the fixing plate, and the outer wall is connected to the large tooth piece. The noise reduction piece has an inclined surface facing the small tooth piece, wherein the inner walls of the first mounting hole and the second mounting hole are both provided with internal threads, and the fastener and the mounting piece both have a rod-shaped locking part, and the outer wall of the locking part is provided with an external thread that meshes with the internal thread.

[0006] In the novel noise reduction gear disc assembly, the noise reduction piece is made of engineering plastic material.

[0007] In the novel noise reduction gear disc assembly, the noise reduction piece is made of engineering plastic material.

[0008] Effects of the utility model

[0009] According to the novel noise reduction gear disc assembly, the large gear plate is fixed on the crank through the noise reduction assembly, so that the chain is rubbed against the inclined surface of the noise reduction piece during the speed change process, i.e., the movement of the chain from the small gear plate to the large gear plate or the movement of the chain from the large gear plate to the small gear plate, and the noise reduction piece is made of engineering plastic material, so that the noise caused by the friction is avoided, the riding experience of the rider is improved, and the practical effect of the utility model is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a sectional view of the utility model and part of the shaft and part of the crank,

[0011] Figure 2 is an enlarged view of A in Figure 1 .

[0012] MARKS:

[0013] 1, shaft; 2, crank; 21, crank jaw; 22, first mounting hole; 23, second mounting hole; 3, small gear plate; 4, fastener; 5, large gear plate; 6, noise reduction assembly; 61, fixed plate; 62, mounting piece; 63, noise reduction piece. DETAILED DESCRIPTION

[0014] In order to make the technical means, creative features, purposes and effects achieved by the utility model easy to understand, the following embodiments are combined with the drawings to specifically describe the utility model.

[0015] EMBODIMENT

[0016] Figure 1 is a sectional view of the utility model and part of the shaft and part of the crank, Figure 2 is an enlarged view of A in Figure 1 .

[0017] As shown in Figure 1 and Figure 2 , the embodiment provides a novel noise reduction gear disc assembly, which comprises a crank 2, a small gear plate 3, a large gear plate 5 and a noise reduction assembly 6.

[0018] As shown in Figure 1 andFigure 2 As shown in the figure, one end of the crank 2 is provided with a hole for connecting with the middle shaft 1. In the embodiment, the hole for connecting with the middle shaft 1 is preferably a blind hole structure. A plurality of crank claws 21 are provided on the end face of one end of the crank 2 and are circumferentially arranged. Each of the crank claws 21 is provided with a first mounting hole 22. A plurality of second mounting holes 23 are provided on the end face of one end of the crank 2 and are located on the outer circumferential side of the plurality of crank claws 21. In the embodiment, the plurality of second mounting holes 23 are uniformly arranged on the end face of one end of the crank 2 in the circumferential direction, and the second mounting holes 23 and the first mounting holes 22 are preferably blind hole structures.

[0019] As shown in the figure, Figure 1 and Figure 2 the small toothed plate 3 is fixed on the plurality of crank claws 21 by a plurality of fasteners 4. In the embodiment, the small toothed plate 3 is provided with a through hole at a position corresponding to each of the first mounting holes 22, so that the fastener 4 can pass through and be locked with the first mounting hole 22.

[0020] As shown in the figure, Figure 1 and Figure 2 the large toothed plate 5 is fixed on the end face of one end of the crank 2 by a noise reduction assembly 6. The noise reduction assembly 6 includes a fixing plate 61, a plurality of mounting pieces 62, and a noise reduction piece 63. The fixing plate 61 is annular and is arranged on the end face of one end of the crank 2 and is located on the outer circumferential side of the plurality of crank claws 21. The fixing plate 61 is provided with a through hole on the wall of the plate and at a position corresponding to each of the second mounting holes 23. Each of the mounting pieces 62 can pass through a through hole and be locked with the second mounting hole 23 corresponding to the through hole, so as to fix the fixing plate 61 on the crank 2. The noise reduction piece 63 is annular, the inner wall of the noise reduction piece 63 is connected with the fixing plate 61, the outer wall of the noise reduction piece 63 is connected with the large toothed plate 5, and the noise reduction piece 63 has an inclined surface facing the small toothed plate 3. In the embodiment, the noise reduction piece 63 is an engineering plastic noise reduction piece, and the fixing plate 61 is a metal fixing plate. In use, the noise reduction piece 63 can reduce the noise generated by friction during gear shifting, and the fixing plate 61 can increase the fixing strength of the noise reduction piece 63.

[0021] As shown in the figure, Figure 2 the inner wall of the fixing plate 61 will be in close contact with the outer wall of the crank claw 21, and the fixing plate 61 will protrude from the crank 2. One end of the noise reduction piece 63 wraps part of the outer wall of the fixing plate 61 and part of the fixing plate 61 protruding from the crank 2, and the other end is provided with a hole and a clamping groove for fixing the large toothed plate 5, so as to ensure the stability of the connection between the noise reduction piece 63 and the fixing plate 61 and the large toothed plate 5.

[0022] In the embodiment, the inner walls of the first mounting holes 22 and the second mounting holes 23 are provided with internal threads, and the fasteners 4 and the mounting pieces 62 are provided with rod-shaped locking portions, and the outer walls of the locking portions are provided with external threads which are in meshing engagement with the internal threads. In the embodiment, the fasteners 4 and the mounting pieces 62 are preferably screws.

[0023] Effects of embodiments

[0024] According to the novel noise reduction gear disc assembly, the large gear plate is fixed on the crank through the noise reduction assembly, so that when the chain moves from the small gear plate to the large gear plate or moves from the large gear plate to the small gear plate, the chain will rub against the inclined surface of the noise reduction part, and since the noise reduction part is made of engineering plastic material, noise caused by friction can be avoided, thereby improving the riding experience of the rider and ensuring the practical effect of the novel noise reduction gear disc assembly.

[0025] The above embodiment is a preferred case of the utility model, and does not limit the protection scope of the utility model.

Claims

1. A novel noise-reducing sprocket assembly, comprising a crank, a small sprocket, and a large sprocket, characterized in that: One end of the crank is provided with a hole for connecting to the middle shaft, a plurality of crank claws are provided on the end surface of one end of the crank and along the circumference, each of the crank claws is provided with a first mounting hole, a plurality of second mounting holes are provided on the end surface of one end of the crank and located on the outer circumference of the plurality of crank claws, the small gear plate is fixed to the plurality of crank claws by a plurality of fasteners, and the large gear plate is fixed to the end surface of one end of the crank by a noise reduction component. The noise reduction assembly includes a fixing plate, a plurality of mounting members, and a noise reduction member, the fixing plate being annular and being arranged on one end surface of the crank and being located on the outer peripheral side of the plurality of crank claws, a through hole being opened on the plate wall of the fixing plate and corresponding to each of the second mounting holes, each of the mounting members can pass through one of the through holes and be locked with the second mounting hole corresponding to the through hole, thereby fixing the fixing plate to the crank, the noise reduction member being annular, the inner wall of the noise reduction member being connected to the fixing plate, and the outer wall being connected to the large tooth plate, the noise reduction member having an inclined surface facing the small tooth plate, The inner walls of the first mounting hole and the second mounting hole are both provided with internal threads, the fastener and the mounting piece both have a rod-shaped locking portion, and the outer walls of the locking portion are both provided with external threads that mesh with the internal threads.

2. The novel noise reduction gear disc assembly according to claim 1 is characterized in that: in, The noise reduction component is made of engineering plastic material.

3. The novel noise reduction gear disc assembly according to claim 1 is characterized in that: in, The fixing plate is made of metal.

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