CN217671977U - Noise reduction structure of bicycle hub - Google Patents

Abstract

The application provides a noise reduction structure for a bicycle hub, comprising: a hub shell and a ratchet seat are rotatably sleeved on a mandrel through a plurality of bearings, the hub shell is assembled with a driven gear ring, and the ratchet seat A first driving tooth and a stop ring are provided; a ratchet group includes a driving tooth plate, a biasing member, a linking tooth plate and a washer, and the driving tooth plate is provided with a second driving tooth meshing with the first driving tooth of the ratchet seat. The plate is provided with a plurality of first ratchet teeth, the interlocking tooth plate drives the driven gear ring to rotate, the interlocking tooth plate is provided with second ratchet teeth to engage with the first ratchet teeth of the driving tooth plate, and the biasing member is arranged on the hub shell The concave ring of the body constantly pushes the driving toothed plate against the interlocking toothed plate, the washer has an abutting surface that fits with the interlocking toothed plate, and the side surface has a gap with the stop ring of the ratchet seat, and extends toward the stop ring of the ratchet seat an elastic abutting part, the elastic abutting part has several concave parts and protruding parts abutting against the stop ring, so as to achieve the function of noise reduction.

Description

Noise reduction structure of bicycle hub

technical field

The present application relates to a flower hub structure of a bicycle, especially a flower hub structure with noise reduction function.

Background technique

In modern life, if you want to be healthy and look young, exercise is the most direct way, and cycling is one of the sports items that have been widely advocated in recent years. More and more people ride bicycles around in their spare time during holidays. Not only is it relaxing and comfortable, but they can also enjoy the beautiful scenery along the way. Compared with running, they are less likely to feel tired and can reduce the burden on their knees. It is suitable for long-term exercise. In particular, cycling can reduce the burden on the knees more than walking and jogging, and it also has a good exercise effect.

After years of research and development, bicycles have expanded from traditional means of transportation to competition, sports and leisure functions, and are constantly introducing new ones. Lightweight bicycles and shock-absorbing functions have become very important demands in the bicycle market in recent years. And general bicycle drives the ratchet seat of rear wheel with chain to rotate, and this ratchet seat drives rear flower hub to rotate through a ratchet group again, and this ratchet group comprises a first chainring, a second chainring, and this first chainring and the second toothing A plurality of ratchets are respectively provided on the opposite surfaces of the two toothed discs. The first toothed disc and the second toothed disc are each equipped with a metal elastic member such as a spring on the axially outer side. The first toothed disc can be driven to rotate by the ratchet seat, and the second toothed disc can The chainring can be free and can drive the rear hub to rotate. When the bicycle pedal is stepped forward, the ratchet seat will drive the first chainring to rotate forward at the same time, and through the elastic member on the outside of the first toothed plate and the second toothed plate The elastic force makes the first and second chainrings close together so that the ratchets mesh with each other to drive the rear hub to rotate, and then drive the bicycle to move forward. Turning its ratchet will push away the ratchet of the second chainring, so that the rear flower hub forms idling and cannot drive the bicycle to move forward.

Since the elastic piece on the side of the first toothed plate is between the first toothed plate and the ratchet seat, the two sides of the elastic piece are respectively in contact with the radial surface of the first toothed plate and the inner surface of the ratchet seat. When the disc/ratchet seat rotates, it will generate friction and make noise.

Utility model content

The main purpose of this application is to install a gasket made of rubber between the interlocking chainring of the ratchet set and the ratchet seat. The interlocking chainrings fit together, so that the ratchet seat drives the ratchet group to drive the hub shell to rotate, and the noise can be reduced.

To achieve the above purpose, the present application discloses a bicycle hub noise reduction structure, including: a spindle, a hub shell, a ratchet seat and a ratchet set, the spindle is fixed and has a first end with different directions and a second end; the hub shell is rotatably sleeved on the spindle through at least one bearing, the hub shell is provided with an annular accommodation space, and a concave ring is provided inside the accommodation space, The concave ring has a blocking wall, and a driven gear ring is assembled in the accommodating space; the ratchet seat is rotatably sleeved on the second end of the spindle through at least one bearing, and the ratchet seat faces the hub shell The body housing is provided with a first driving tooth and a stop ring adjacent to the first driving tooth; the ratchet set includes: a driving chainring, a biasing member, a linking toothing and a washer, the driving toothing is set A second driving tooth meshes with the first driving tooth of the ratchet seat, and the driving toothed disc is provided with a plurality of first ratchets facing the direction ring of the ratchet seat, and the interlocking toothed disc can drive the driven toothed ring to rotate The interlocking chainring is provided with a plurality of second ratchets to engage with the first ratchets of the driving chainring facing the direction ring of the hub shell, the biasing member is arranged on the concave ring of the hub shell, and Push the driving chainring to the linkage chainring, the washer is made of elastic material, has a contact surface to fit the linkage chainring and one side surface has a gap with the stop ring of the ratchet seat, the washer faces the The stop ring of the ratchet seat extends axially with an elastic abutment portion, and the elastic abutment portion has a plurality of depressions, and a protrusion is formed between the two depressions to abut against the stop ring.

In an embodiment of the present application, the washer has at least one protrusion extending axially towards the stop ring of the ratchet seat.

In one embodiment of the present application, the interlocking toothed plate is provided with a concave portion facing the direction of the ratchet seat to install the washer. The concave portion has a diameter surface and a peripheral surface. face fit.

In an embodiment of the present application, a concave neck is formed between the stop ring of the ratchet seat and the first driving tooth, and the washer is arranged around the outer circumference of the concave neck.

In one embodiment of the present application, the driving chainring is conical in the direction facing the ratchet seat and is arranged with a plurality of concave and convex first ratchet teeth, and the interlocking chainring is facing the direction of the hub shell. A conical surface obliquely arranged towards the direction of the mandrel is provided with a plurality of concavo-convex second ratchets surrounding the conical surface.

In one embodiment of the present application, the biasing member is a spring sheathed on the outer circumference of the collar of the driving chainring, one end of the biasing member is against the blocking wall of the hub shell, and the biasing member The other end of the abuts against the driving chainring.

In an embodiment of the present application, the first driving tooth is a right helical helical gear, and the second driving tooth is a left helical helical gear.

In one embodiment of the present application, the accommodating space is provided with an internal thread, the driven gear ring is provided with an external thread screwed with the internal thread of the accommodating space, and the outer circumference of the interlocking toothed disc is provided with an outer ring tooth , the outer ring teeth mesh with an inner ring tooth of the driven gear ring.

In one embodiment of the present application, the hub shell is rotatably sleeved on the first end of the spindle through a first bearing and a second bearing, and the ratchet seat is rotatably sleeved on the first end of the spindle through a third bearing and a The fourth bearing is rotatably sleeved on the second end of the spindle.

In this application, a rubber washer is installed between the interlocking toothed plate and the ratchet seat. Since the washer has considerable elasticity, and the abutment surface on one side of the washer fits closely with the radial surface of the concave part of the interlocking toothed plate The washer extends toward the stop portion of the ratchet seat with an elastic abutment portion, the elastic abutment portion has a plurality of depressions, and a protrusion is formed between the two depressions to abut against the stop ring of the ratchet seat, and the washer Made of rubber material, it is installed in the concave part of the interlocking chainring and fits the radial surface of the concave part. The convex part of the elastic abutting part is in contact with the radial surface of the stop ring of the ratchet seat, and has good elasticity. One protrusion to increase the contact area can reduce the noise generated by the rotation friction of the ratchet seat/linked chainring.

Details about other functions and embodiments of the present application are described below with reference to the accompanying drawings.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in this application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Figure 1 is an exploded perspective view of a preferred embodiment of the present application;

Fig. 2 is an exploded perspective view of another direction of a preferred embodiment of the present application;

Fig. 3 is the combined sectional view of the preferred embodiment of the present application;

Figure 4 is a perspective view of a gasket in a preferred embodiment of the present application;

Fig. 5 is a perspective view of another direction of the gasket of the preferred embodiment of the present application;

Fig. 6 is a plane sectional view of a gasket of a preferred embodiment of the present application;

Figure 7A is a partial enlarged view of a preferred embodiment of the present application;

Fig. 7B is an operation diagram of Fig. 7A.

Symbol Description

10: Mandrel 11: First end 12: Second end

13: First cover 14: Second cover 20: Hub shell

21: First bearing 22: Second bearing 23: Driven end

24: Accommodating space 241: Internal thread 25: Recessed ring

251: Retaining wall 26: Driven gear ring 261: Inner ring gear

262: External thread 30: Ratchet seat 31: Third bearing

32: Fourth bearing 33: First drive tooth 34: Stop ring

35: Dimple neck 36: Dust cover 40: Ratchet set

41: Driving chainring 411: Second driving tooth 412: First ratchet

413: Sleeve ring 42: Interlocking chainring 421: Outer ring teeth

422: Second ratchet 423: Recess 424: Radial surface

425: Surrounding surface 43: Biasing member 44: Washer

441: abutment surface 442: side surface 443: elastic abutment portion

4431: Recess 4432: Projection L: Gap

Detailed ways

The positional relationships described in the following embodiments include: up, down, left and right. Unless otherwise specified, they are all based on the directions in which the components are drawn in the drawings.

First, please refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 7A, the bicycle hub noise reduction structure of the present application includes: a mandrel 10, a hub shell 20 through which both ends penetrate, a ratchet seat 30 and a ratchet group 40 . The mandrel 10 has a first end 11 and a second end 12 in different directions. The first end 11 of the mandrel 10 is screwed to a first cover 13 , and the second end 12 of the mandrel 10 is screwed to a second cover 14 .

The hub shell 20 is rotatably sleeved on the first end 11 of the spindle 10 through a plurality of bearings. In this embodiment, the hub shell 20 is rotatable through a first bearing 21 and a second bearing 22 The hub shell 20 has a driven end 23 facing the direction of the ratchet seat 30, and the driven end 23 is provided with an annular accommodating space 24, and the accommodating space 24 There is a concave ring 25 inside, the radial surface of the concave ring 25 is a retaining wall 251, the accommodation space 24 is equipped with a driven gear ring 26, and the inner ring surface of the driven gear ring 26 is provided with a plurality of concave and convex inner ring teeth. 261 , in this embodiment, the accommodating space 24 is provided with an internal thread 241 , and the driven gear ring 26 is provided with an external thread 262 screwed to the internal thread 241 of the accommodating space 24 .

The ratchet seat 30 is a hollow cylinder with two ends through, and is rotatably sleeved on the second end 12 of the spindle 10 through a plurality of bearings. A fourth bearing 32 is rotatably sleeved on the second end 12 of the spindle 10. The end of the ratchet seat 30 facing the direction of the hub shell 20 is provided with a first driving tooth 33. In this embodiment, the first driving tooth 33 The tooth 33 is a right helical helical gear, and the ratchet seat 30 is provided with a stop ring 34 adjacent to the outer circumference of the first drive tooth 33. There is a concave neck 35 between the stop ring 34 and the first drive tooth 33, and the stop ring 34 An annular dustproof cover 36 is sleeved on the outer periphery.

The ratchet group 40 comprises a driving toothed disc 41, a linking toothed disc 42, a biasing member 43 and a washer 44, wherein the driving toothed disc 41 is a ring whose inner diameter is provided with a second driving tooth 411, the second The driving tooth 411 is meshed with the first driving tooth 33 of the ratchet seat 30. In this embodiment, the second driving tooth 411 is a left helical helical gear, and the driving gear plate 41 is conical and arranged in a direction facing the ratchet seat 30. There are a plurality of concave and convex first ratchet teeth 412 , and a collar 413 protrudes from the driving toothed plate 41 facing the direction of the hub shell 20 .

The interlocking chainring 42 is a ring body, and its outer peripheral surface is provided with an outer ring tooth 421 , the outer ring tooth 421 meshes with the inner ring tooth 261 of the driven gear ring 26 , and the interlocking toothing plate 42 faces the hub shell 20 The direction has a conical surface inclined inwards, and the conical surface is annularly provided with a plurality of concave and convex second ratchets 422. The meshing can drive the interlocking toothed plate 42 to rotate. The interlocking toothed plate 42 is provided with a concave portion 423 facing the direction of the ratchet seat 30 . The concave portion 423 has a radial surface 424 and a peripheral surface 425 .

The biasing member 43 is disposed between the concave ring 23 of the hub shell 20 and the driving chainring 41. In this embodiment, the biasing member 43 is a spring sleeved on the outer circumference of the collar 413 of the driving chainring 41, biasing One end of the pressing member 43 abuts against the blocking wall 251 of the concave ring 25 of the hub shell 20 , and the other end of the biasing member 43 abuts against the driving toothed plate 41 to push the driving toothed plate 41 to the interlocking toothed plate 42 .

The washer 44, please refer to Fig. 1, Fig. 4, Fig. 5, Fig. 6 and Fig. 7A, is a rubber material with considerable elasticity and can be compressed. Set on the outer periphery of the concave neck 35 of the ratchet seat 30 , the section of the washer 44 is flat, and has an abutment surface 441 that fits the radial surface 424 of the concave portion 423 of the interlocking toothed disc 42 , and a stop ring facing the ratchet seat 30 There is a gap L between the side surface 442 of the ratchet seat 30 and the stop ring 34 of the ratchet seat 30. The washer 44 extends axially toward the stop ring 34 of the ratchet seat 30 and has an elastic abutment portion 443. The elastic abutment portion 443 has a plurality of depressions 4431. In this embodiment, the elastic abutting portion 443 is provided with five depressions 4431 in a circular equidistant manner, and a protrusion 4432 is formed between the two depressions 4431 to abut against the stop ring 34. The protruding portions 4432 are obliquely arranged from the abutting surface 441 of the washer 44 toward the stop ring 34 of the ratchet seat 30 to bear against the stop ring 343 .

Through the above-mentioned structure, please refer to Fig. 3, Fig. 7A, Fig. 7B again, when stepping on the bicycle to move forward (forward rotation drive), the ratchet seat 30 will be driven by the chain to rotate forward, the first drive tooth of the ratchet seat 30 33 meshes with the second driving tooth 411 of the driving toothed plate 41, which will drive the first driving tooth 33 to rotate. Since the biasing member 43 pushes the driving toothed plate 41 towards the linkage toothed plate 42, the first ratchet of the driving toothed plate 41 The tooth 412 meshes with the second ratchet 422 of the interlocking toothed disc 42 , and then drives the interlocking toothed disc 42 to rotate. The teeth 261 engage, thereby driving the hub shell 20 to rotate in a positive direction, and the bicycle moves forward.

When stepping on the bicycle pedal backwards, the ratchet seat 30 will be driven by the chain to rotate in the opposite direction, the first drive tooth 33 of the ratchet seat 30 reversely drives the driving gear plate 41 to reverse, and the first ratchet 412 on the driving tooth plate 41 reverses. The second ratchet 422 of the interlocking toothed disc 42 will be disengaged from the rotation to the direction of the biasing member 42, and the biasing member 43 will be pressed, so that the interlocking toothed disc 42 cannot drive the driven toothed ring 26 to rotate, and then the ratchet The hub shell 20 forms idling and cannot drive the bicycle forward.

It is worth mentioning that in this application, a washer 44 made of rubber is installed between the interlocking toothed plate 42 and the ratchet seat 30 . Since the abutment surface 441 on one side of the washer 44 fits with the radial surface 424 of the concave portion 423 of the interlocking toothed disc 42 , the washer 44 has an elastic abutment portion 443 extending toward the stop portion 34 of the ratchet seat 30 , and the elastic abutment portion 443 There are a plurality of protrusions 4432 against the stop ring 34 of the ratchet seat 30. The washer 44 is made of rubber material, installed in the concave portion 433 of the interlocking toothed plate 43 and fits with the radial surface 424 of the concave portion 433, and its elastic resistance The protruding portion 4432 of the backing portion 443 is in radial contact with the stop ring 34 of the ratchet seat 30 , has good elasticity, and can reduce the noise generated by the friction of the ratchet seat 30 /interlocking toothed plate 42 .

The embodiments and/or implementations described above are only used to illustrate the preferred embodiments and/or implementations of the technology of the present application, and are not intended to limit the implementation of the technology of the application in any form. Personnel, without departing from the scope of the technical means disclosed in this application, may make some changes or modifications to other equivalent embodiments, but it should still be regarded as the technology or embodiment substantially the same as this application.

Claims (9)

1. A bicycle hub noise reduction structure, comprising:

a mandrel having a first end and a second end with different directions;

a hub shell rotatably sleeved at the first end of the mandrel through at least one bearing, wherein the hub shell is provided with an annular accommodating space, a concave ring is arranged in the accommodating space, the concave ring is provided with a baffle wall, and the accommodating space is assembled with a driven gear ring;

the ratchet wheel seat is rotatably sleeved at the second end of the mandrel through at least one bearing, and is provided with a first driving tooth and a stop ring which are adjacent to the first driving tooth facing the hub shell;

a ratchet assembly, comprising: the driving fluted disc is provided with a second driving tooth which is meshed with the first driving tooth, the driving fluted disc is annularly provided with a plurality of first ratchets in the direction of the ratchet seat and can drive the driven fluted disc to rotate, the linkage fluted disc is annularly provided with a plurality of second ratchets in the direction of the hub shell and is meshed with the first ratchets, the bias component is arranged on the concave ring of the hub shell and pushes the driving fluted disc to the linkage fluted disc, the gasket is made of elastic material and provided with a butting surface which is jointed with the linkage fluted disc, a gap is reserved between one side surface of the gasket and the stop ring, the gasket axially extends towards the stop ring and is provided with an elastic butting part which is provided with a plurality of concave parts, and a convex part is formed between the two concave parts and butts against the stop ring.

2. The bicycle hub noise reduction structure according to claim 1, wherein the washer has at least one of the protrusions extending axially toward the stop ring of the ratchet seat.

3. The noise reduction structure for a bicycle hub according to claim 1, wherein the linking gear plate has a recess facing the ratchet seat for receiving the washer, the recess has a radial surface and a circumferential surface, and the abutting surface of the washer abuts against the radial surface.

4. The noise reducing structure for a bicycle hub according to claim 1, wherein the stop ring and the first driving tooth have a recessed neck therebetween, and the washer is disposed around the periphery of the recessed neck.

5. The noise reduction structure for a bicycle hub according to claim 1, wherein the driving gear plate has a tapered surface facing the hub shell and inclined toward the spindle, and the tapered surface has a plurality of second concave-convex ratchet teeth.

6. The noise reducing structure for a bicycle hub according to claim 1, wherein the biasing member is a spring disposed around the collar, one end of the biasing member abuts against the blocking wall, and the other end of the biasing member abuts against the driving sprocket.

7. The bicycle hub noise reduction structure according to claim 1, wherein the first driving tooth is a right helical gear and the second driving tooth is a left helical gear.

8. The noise reduction structure for a bicycle hub according to claim 1, wherein the receiving space has an internal thread, the driven toothed ring has an external thread for engaging with the internal thread, and the outer periphery of the linking toothed disc has an outer ring tooth engaged with an inner ring tooth of the driven toothed ring.

9. The noise reduction structure for a bicycle hub according to claim 1, wherein the hub housing is rotatably received at the first end of the spindle through a first bearing and a second bearing, and the ratchet seat is rotatably received at the second end of the spindle through a third bearing and a fourth bearing.

Images