CN214063619U - Flywheel assembly of bicycle - Google Patents
Flywheel assembly of bicycle Download PDFInfo
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- CN214063619U CN214063619U CN202022659058.0U CN202022659058U CN214063619U CN 214063619 U CN214063619 U CN 214063619U CN 202022659058 U CN202022659058 U CN 202022659058U CN 214063619 U CN214063619 U CN 214063619U
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- sprocket
- adapter
- assembly according
- combining
- ratchet
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Abstract
A flywheel assembly of a bicycle is used for being arranged on a ratchet wheel seat of the bicycle. The ratchet seat is suitable for rotating by taking the rotating shaft as an axis, and at least one torque transmission part is arranged on the radial outer side of the ratchet seat for transmitting torque. The flywheel assembly includes a first adapter, a second adapter, and a friction element. The first adapter comprises a main body part, wherein the main body part is sleeved on the ratchet seat and combined with the torque transmission part and comprises a first combination part with a first threaded part. The second adapter includes a second joint portion and a tightening portion connected to the second joint portion. The second combining part is provided with a second threaded part which is suitable for being screwed with the first threaded part of the first combining part. The friction piece is arranged in an accommodating space which is surrounded by the tightening part, the radial outer side of the ratchet seat and one side of the first combining part in the direction of the rotating shaft.
Description
Technical Field
The utility model relates to a bicycle especially relates to a flywheel subassembly of bicycle.
Background
The rear flywheel of the bicycle is combined with the wheel shaft of the rear wheel through a chain wheel set, and the chain wheel set and the wheel shaft are connected through a ratchet wheel seat. The current sprocket assembly is secured to the ratchet seat by an adapter that is threadably engaged to the ratchet seat.
However, current adapters typically have a single diameter, and the smallest sprocket located at the outermost periphery must also be sized to engage the adapter throughout all but the largest sprocket, thereby limiting the overall design of the flywheel assembly.
Furthermore, the threaded position of the adapter with the ratchet seat is far from the smallest sprocket, which also results in a too long stress transmission path when the smallest sprocket is used for transmission, thus easily destroying the adapter.
SUMMERY OF THE UTILITY MODEL
The utility model provides a flywheel assembly of bicycle, the size of sprocket can not receive the influence of adapter piece, and has higher incorruptibility.
The utility model provides a flywheel assembly is used for setting up in the ratchet seat of bicycle. The ratchet seat is suitable for rotating by taking the rotating shaft as an axis, and at least one torque transmission part is arranged on the radial outer side of the ratchet seat for transmitting torque. The flywheel assembly includes a first adapter, a second adapter, and a friction element. The first adapter comprises a main body part, wherein the main body part is sleeved on the ratchet seat and comprises a first combining part with a first thread part, and the main body part is used for being combined with the torque transmission part of the ratchet seat. The second adapter includes a second joint portion and a tightening portion connected to the second joint portion. The second combining part is provided with a second threaded part which is suitable for being screwed with the first threaded part of the first combining part. The tightening part, the radial outer side of the ratchet seat and one side of the first combining part in the direction of the rotating shaft surround an accommodating space. The friction piece is arranged in the accommodating space. The second adapting piece is in the process of being screwed on the first thread part, the tightening part pushes the friction piece, so that the friction piece is supported on the second combining part, radial force towards the rotating shaft is generated by tightening the friction piece, and the flywheel component is fixed on the ratchet wheel seat.
In an embodiment of the present invention, the second adapter further includes an adapting portion and an operating portion. The adapting part extends from the tightening part along the direction of the rotating shaft, and the outer diameter of the adapting part is smaller than that of the tightening part. The operating part extends to the direction of the rotating shaft from the adapting part and is positioned outside one side of the ratchet wheel seat far away from the first chain wheel set of the flywheel assembly, and the operating part is provided with an operating configuration for tool combination installation.
In an embodiment of the present invention, the inner diameter of the operation portion is smaller than the inner diameter of the second connection portion.
In an embodiment of the present invention, the main body further includes a first sprocket engaging portion, the first sprocket engaging portion is provided with a first sprocket set, and the first sprocket set is provided with at least one first sprocket.
In an embodiment of the present invention, the flywheel assembly further includes a sprocket base. One side of the chain wheel base is used for fixing the first chain wheel set.
In an embodiment of the present invention, the flywheel assembly further includes a second sprocket set. The second chain wheel set is arranged on the chain wheel base, and the installation position of the second chain wheel set is closer to the operation part than the first chain wheel set.
In an embodiment of the present invention, the flywheel assembly further includes a third sprocket set. The third chain wheel set is arranged on the chain wheel base and is positioned between the first chain wheel set and the second chain wheel set.
In an embodiment of the present invention, the friction member has a pressure receiving surface, a stop surface, and a pressing surface. The pressure receiving surface is pushed by the pressing part of the second adapting piece. The stop surface faces the first combining part and is pushed by the first combining part. The pressing surface is contacted with the radial outer side of the ratchet seat.
In an embodiment of the present invention, an included angle between the pressure receiving surface or the stop surface of the friction member and the pressing surface is smaller than 90 °.
In an embodiment of the present invention, the friction member has a groove, so that the shape of the friction member can be changed in response to the pushing between the first adaptor and the second adaptor.
In an embodiment of the present invention, the first thread portion is an external thread; the second thread part is an internal thread.
The embodiment of the utility model provides a flywheel subassembly of bicycle is by first adapter part and second adapter part compel tight friction part and additionally obtain the radial force of fixing the flywheel subassembly on the ratchet seat, because of the distance between friction part and the second sprocket group is short in the distance of the spiro union portion on minimum sprocket and the ratchet seat among the prior art, consequently can shorten the moment that produces when transmitting. In addition, the inner diameter of the second adapter at the operating part is smaller than that at the second joint part, so the size of the second sprocket set can be less limited by the size of the second adapter, thereby the overall design of the flywheel assembly has more elasticity.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is an exploded view of a flywheel assembly of a bicycle in accordance with an embodiment of the present invention;
FIG. 2 is a schematic top view of a flywheel assembly of a bicycle in accordance with an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along line AA of FIG. 2;
FIG. 4 is a perspective view of FIG. 3; and
fig. 5 is an enlarged schematic view of the first adaptor and the second adaptor of fig. 1.
Detailed Description
Fig. 1 is an exploded view of a flywheel assembly of a bicycle according to an embodiment of the present invention, fig. 2 is a top view of the flywheel assembly of the bicycle according to an embodiment of the present invention, fig. 3 is a cross-sectional view of fig. 2 along line AA, fig. 4 is a perspective view of fig. 3, and fig. 5 is an enlarged view of the first adapter and the second adapter of fig. 1. Referring to fig. 1 to 5, the flywheel assembly 10 of the present embodiment includes a ratchet seat 100, a first adaptor 200, a second adaptor 300, and a friction element 400.
The ratchet holder 100 rotates about the rotation shaft R1 as an axis, and includes a torque transmission portion 110 surrounding the rotation shaft R1 on the radially outer side. The ratchet seat 100 may be a barrel for engaging a spindle (not shown) of a rear wheel of a bicycle.
The first adaptor 200 includes a main body portion 214 and a first coupling portion 211. The main body portion 214 in this embodiment includes a torque transmission structure 216 extending radially toward the rotation axis R1 to couple with the torque transmission portion 110 of the ratchet seat 100 and the first sprocket coupling portion 213 to connect with at least one first sprocket 215. In the present embodiment, the first sprocket combining part 213 and the first sprocket 215 can be integrally formed, but not limited thereto, and in other embodiments, the first sprocket combining part 213 and the first sprocket 215 can be combined by a connecting member. The main body portion 214 may have a cylindrical configuration to be sleeved on the radially outer side of the torque transmission portion 110. The torque transmission portion 110 and the torque transmission structure 216 have concave-convex structures corresponding to each other, so that the main body portion 214 and the ratchet seat 100 are positioned in the rotation direction of the rotation shaft R1. In the technical field of bicycles, the torque transmitting part 110 may be referred to as a spline part. The first coupling portion 211 is provided with a first threaded portion 212, and the first threaded portion 212 may be an external thread disposed on a radial outer side of the first coupling portion 211 or an internal thread disposed on a radial inner side (not shown) of the first coupling portion 211.
The second adapter 300 may be a barrel, and includes a second coupling portion 310 and a tightening portion 320 connected to the second coupling portion 310. The second coupling portion 310 has a second screw portion 311 at a radially inner side thereof to be screw-coupled with the first screw portion 212 of the first coupling portion 211. The urging portion 320, the radial outer side of the ratchet seat 100, and one side of the first coupling portion 211 in the direction of the rotation axis R1 may enclose an accommodating space S. The second adaptor 300 may further include an adapting portion 330 and an operating portion 340. The fitting portion 330 extends along the direction of the rotation axis R1 to the tightening portion 320 and is adapted to be sleeved on the radial outer side of the ratchet seat 100. The operating portion 340 extends in the direction of the rotation axis R1 beyond the adapting portion 330 and the side of the ratchet seat 100 away from the first sprocket set 210 of the freewheel assembly 10.
The friction member 400 is annular and disposed in the accommodating space S. The friction member 400 has a pressure surface 401, a stop surface 402, a press surface 403, and a groove 404. The pressure receiving surface 401 faces the pressing portion 320 of the second adapter 300, the stop surface 402 faces the first coupling portion 211, and the pressing surface 403 contacts the radial outside of the ratchet seat 100. During the process of screwing the second adapter 300 to the first combining portion 211 by the second combining portion 310, the pressing portion 320 pushes against the pressure receiving surface 401 of the friction member 400, so that the stop surface 402 of the friction member 400 is abutted against the first combining portion 211, and by pressing the friction member 400, a radial force F toward the rotation axis R1 is generated on the pressing surface 403, thereby fixing the flywheel assembly 10 on the ratchet seat 100.
In the direction of the rotation axis R1, the tube diameter of the tightening portion 320 tapers from the second combining portion 310 to the adapting portion 330, so that the enclosed accommodating space S is wedge-shaped in the plane extending from the rotation axis R1, and the cross section of the friction member 400 is slightly smaller than the accommodating space S. The ratchet seat 100 has a convex step structure on the side away from the first sprocket set 210, the convex step structure is tapered towards the edge, and the fitting part 320 is a convex step structure conforming to the ratchet seat 100. The cylinder diameter of the operating portion 340 may be smaller than that of the adapting portion 330, and the radial inner side of the operating portion 340 may be a concave-convex surface for being combined with a corresponding tool, so that a user can screw the second adaptor 300 to the first combining portion 211.
The freewheel assembly 10 can further include a second sprocket set 220, a third sprocket set 230, and a sprocket base 240. The second sprocket set 220 is sleeved on the radial outer side of the operating part 340. The third sprocket set 230 is fixed between the second sprocket set 220 and the first sprocket set 210. The sprocket base 240 has one side for fixing the first sprocket set 210 and the other side for fixing the second sprocket set 220 and the third sprocket set 230. The first sprocket set 210, the second sprocket set 220, and the third sprocket set 230 can be assembled together by the sprocket base 240. The first sprocket set 210 has the largest size of the first sprocket 215, which may be referred to as the largest sprocket set, the second sprocket set 220 has the smallest size, which may be referred to as the smallest sprocket set, and the third sprocket set 230 may have a size between the first and second sprocket sets 210 and 220.
The embodiment of the utility model provides a flywheel subassembly of bicycle is by first adapter part and second adapter part compel tight friction part and additionally obtain the radial force of fixing the flywheel subassembly on the ratchet seat, because of the distance between friction part and the second sprocket group is short in the distance of the spiro union portion on minimum sprocket and the ratchet seat among the prior art, consequently can shorten the moment that produces when transmitting. In addition, the inner diameter of the second adapting piece at the operating part is smaller than that at the second threaded part, so that the size of the second sprocket set can be less limited by the size of the second adapting piece, and the overall design of the flywheel component has greater elasticity.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with reference to the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make many modifications or equivalent variations by using the above disclosed method and technical contents without departing from the technical scope of the present invention, but all the simple modifications, equivalent variations and modifications made by the technical spirit of the present invention to the above embodiments are within the scope of the technical solution of the present invention.
Claims (12)
1. A flywheel assembly of a bicycle, for set up in a ratchet seat of a bicycle, the ratchet seat is suitable for and regard a pivot as the axle center and rotate, and there is at least a torque transmission part in order to carry on the torque transmission in a radial outside, characterized by that, the flywheel assembly includes:
a first adapter, including a main body part, the main body part is sleeved on the ratchet seat and includes a first combining part with a first thread part, the main body part is used for combining with the torque transmitting part of the ratchet seat;
the second adapter comprises a second combining part and a tightening part connected with the second combining part, the second combining part is provided with a second threaded part, the second threaded part is suitable for being in threaded connection with the first threaded part of the first combining part, and the tightening part, the radial outer side of the ratchet seat and one side of the first combining part in the rotating shaft direction surround an accommodating space; and
a friction piece configured in the accommodating space;
the second adapter is screwed on the first screw thread part, the tightening part pushes the friction piece, so that the friction piece is supported against the second combining part, and radial force towards the rotating shaft is generated by tightening the friction piece, so that the flywheel component is fixed on the ratchet wheel seat.
2. The freewheel assembly according to claim 1 characterized in that, the second adapter member further comprises:
the adaptive part extends from the tightening part along the direction of the rotating shaft, and the outer diameter of the adaptive part is smaller than that of the tightening part; and
the operating part extends to the adapting part in the direction of the rotating shaft and is positioned outside one side of the ratchet wheel seat far away from a first chain wheel set of the flywheel assembly, and the operating part is provided with an operating configuration for tool combination installation.
3. The freewheel assembly according to claim 2 characterized in that, the inner diameter of the operating portion is smaller than the inner diameter of the second coupling portion.
4. The freewheel assembly according to claim 2 characterized in that, the main body further comprises a first sprocket engaging portion, the first sprocket engaging portion is provided with the first sprocket set, and the first sprocket set is provided with at least a first sprocket.
5. The freewheel assembly according to claim 4 characterized in that, it further comprises a sprocket base, one side of which is used to fix the first sprocket set.
6. The freewheel assembly according to claim 5 characterized in that, it further comprises a second sprocket set mounted on the sprocket base at a position closer to the operating portion than the first sprocket set.
7. The freewheel assembly according to claim 6 characterized in that, it further includes a third sprocket set mounted on the sprocket base between the first and second sprocket sets.
8. The freewheel assembly according to claim 1 characterized in that, it is characterized in that, the friction member has:
the pressing surface is pushed and abutted by the pressing part of the second adapter;
a stop surface facing the first combining part and pushed by the first combining part; and
a pressing surface contacting the radial outer side of the ratchet seat.
9. The freewheel assembly according to claim 8 characterized in that, the included angle between the pressure surface or the stop surface of the friction member and the pressing surface is less than 90 °.
10. The freewheel assembly according to claim 1 characterized in that, the friction member has a cut-out to make the shape of the friction member change due to the pushing of the first adapter member and the second adapter member.
11. The freewheel assembly according to claim 1 characterized in that, the first threaded portion is an external thread and the second threaded portion is an internal thread.
12. The freewheel assembly according to claim 1 characterized in that, the first threaded portion is an internal thread and the second threaded portion is an external thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022659058.0U CN214063619U (en) | 2020-11-17 | 2020-11-17 | Flywheel assembly of bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022659058.0U CN214063619U (en) | 2020-11-17 | 2020-11-17 | Flywheel assembly of bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214063619U true CN214063619U (en) | 2021-08-27 |
Family
ID=77401541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022659058.0U Active CN214063619U (en) | 2020-11-17 | 2020-11-17 | Flywheel assembly of bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214063619U (en) |
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2020
- 2020-11-17 CN CN202022659058.0U patent/CN214063619U/en active Active
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