CN207256728U - A kind of outer core mold of bicycle freewheel - Google Patents
A kind of outer core mold of bicycle freewheel Download PDFInfo
- Publication number
- CN207256728U CN207256728U CN201720993646.3U CN201720993646U CN207256728U CN 207256728 U CN207256728 U CN 207256728U CN 201720993646 U CN201720993646 U CN 201720993646U CN 207256728 U CN207256728 U CN 207256728U
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- CN
- China
- Prior art keywords
- core
- die cavity
- lower die
- bar
- bicycle freewheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The utility model provides a kind of outer core mold of bicycle freewheel, including upper die and lower die and core；The upper die and lower die have identical structure；The lower die circle centre position is provided with circular core, and interior teeth are provided with around circular core；Lower die cavity excircle inner wall is provided with the gear part die cavity of annular；The inner periphery of gear part die cavity is provided with recessed annular stiffening ring die cavity；The annular stiffening ring die cavity inner periphery is provided with the first mandrel layers；First mandrel layers include equally distributed first core of multiple circumferential directions, and first core is semilune structure, and the semilune structure is towards outside；The lower die cavity is provided with multiple radially alternatively distributed bar-shaped troughs and bar shaped core between circular core and the first core.
Description
Technical field
It the utility model is related to the technical field of bicycle, and in particular to a kind of outer core mold of bicycle freewheel.
Background technology
Bicycle freewheel is a kind of important bicycle accessories, and rear wheel is driven by the cooperation of flywheel and chain, will
Manpower is converted into the power of bicycle.Bicycle freewheel of the prior art is varied, most of to be made of metal, structure letter
Single, cost is relatively low.But during actual use, there is weight is big, the shortcomings such as without elasticity and easily get rusty.Grind
Outer core mold of sending out bicycle freewheel a kind of, production is light-weight, intensity is high and the plastic material that possesses preferable cushion performance flies
Wheel, the weight for reducing bicycle, improves efficiency of riding, has great importance.
Utility model content
To achieve these goals, the utility model provides a kind of bicycle freewheel, have it is light-weight, easy to use and
The advantages of security is good.
The bicycle freewheel is realized by the following technical solutions：
A kind of outer core mold of bicycle freewheel, including upper die and lower die and core；The upper die and lower die have identical knot
Structure；The lower die circle centre position is provided with circular core, and interior teeth are provided with around circular core；Lower die cavity excircle inner wall
It is provided with the gear part die cavity of annular；The inner periphery of gear part die cavity is provided with recessed annular stiffening ring die cavity；The annular
Stiffening ring die cavity inner periphery is provided with the first mandrel layers；First mandrel layers include equally distributed first type of multiple circumferential directions
Core, first core are semilune structure, and the semilune structure is towards outside；The lower die cavity is in circular core and
Multiple radially alternatively distributed bar-shaped troughs and bar shaped core are provided between one core.
Preferably, the lower die cavity is provided with annular groove around circular core.
Preferably, the bar-shaped trough and bar shaped core are fillet design.
Preferably, the bar-shaped trough is located along the same line with circular core and the first core.
Relative to core outside metal flywheel common in the art, the outer core of flywheel of the mould production provided in the utility model is by setting
Fat material is made, convenient processing and manufacture and cost is low, can be prepared by injection.The outer core of flywheel provided in the utility model is by resin
Material is made, convenient processing and manufacture and cost is low, can be prepared by injection；It is reduced by the cooperation of exit orifice and endoporus
The outer core weight of flywheel, while the outer core of flywheel is possessed good intensity and rigidity, while also there is preferable elasticity, long-time service
It is not likely to produce crack or damage；By setting external reinforcing circle, the intensity of the outer core of flywheel is improved, while can be by gear part
Uniform force be distributed on wheel body, improve service life, reduce stress concentration；By further setting annular reinforcement
Muscle, ensures the intensity near mounting hole, the stress cracking formed during use effectively can be concentrated on inside, anti-crack arrest
Line extends to whole wheel body, improves service life, also increases the stress ability to bear of the outer core of flywheel；Its by with flywheel
The cooperation of core, power while bicycle weight is effectively reduced, effectively transmitted, improve the effect of riding of bicycle
Rate.
Brief description of the drawings
Fig. 1 is the structure chart of bicycle freewheel in the utility model；
Embodiment
The technical solution of the utility model is described in detail below by specific embodiment, but this practicality is new
The scope of type is not restricted by the embodiments.
As shown in Figure 1, a kind of outer core mold of bicycle freewheel is present embodiments provided, including upper die and lower die 1 and core；
The upper die and lower die have identical structure；The lower die circle centre position is provided with circular core 11, around circular core 11
It is provided with interior teeth；1 excircle inner wall of lower die cavity is provided with the gear part die cavity 2 of annular；The inner periphery of gear part die cavity 2 is set
It is equipped with recessed annular stiffening ring die cavity 3；3 inner periphery of annular stiffening ring die cavity is provided with the first mandrel layers；Described first
Mandrel layers include equally distributed first core 4 of multiple circumferential directions, and first core 4 is semilune structure, the semilune knot
Structure is towards outside；The lower die cavity is provided with multiple radially alternatively distributed between circular core and 11 first cores 4
Bar-shaped trough 5 and bar shaped core 6；The lower die cavity is provided with annular groove around circular core；The bar-shaped trough and bar shaped type
Core is fillet design；The bar-shaped trough is located along the same line with circular core and the first core.
Embodiment above is only the preferred embodiment of the utility model, it should be pointed out that, for ordinary skill
For people, what is carried out on the premise of the utility model is not departed from is partially improved, still in the scope of protection of the utility model it
In.
Claims (4)
1. a kind of outer core mold of bicycle freewheel, including upper die and lower die and core；The upper die and lower die have identical knot
Structure；The lower die circle centre position is provided with circular core, and interior teeth are provided with around circular core；Lower die cavity excircle inner wall
It is provided with the gear part die cavity of annular；The inner periphery of gear part die cavity is provided with recessed annular stiffening ring die cavity；The annular
Stiffening ring die cavity inner periphery is provided with the first mandrel layers；First mandrel layers include equally distributed first type of multiple circumferential directions
Core, first core are semilune structure, and the semilune structure is towards outside；The lower die cavity is in circular core and
Multiple radially alternatively distributed bar-shaped troughs and bar shaped core are provided between one core.
2. the outer core mold of bicycle freewheel according to claim 1, it is characterised in that：The lower die cavity is in circular core
Surrounding is provided with annular groove.
3. the outer core mold of bicycle freewheel according to claim 2, it is characterised in that：The bar-shaped trough and bar shaped core are equal
For fillet design.
4. the outer core mold of bicycle freewheel according to claim 3, it is characterised in that：The bar-shaped trough and circular core and
First core is located along the same line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720993646.3U CN207256728U (en) | 2017-08-10 | 2017-08-10 | A kind of outer core mold of bicycle freewheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720993646.3U CN207256728U (en) | 2017-08-10 | 2017-08-10 | A kind of outer core mold of bicycle freewheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207256728U true CN207256728U (en) | 2018-04-20 |
Family
ID=61924904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720993646.3U Expired - Fee Related CN207256728U (en) | 2017-08-10 | 2017-08-10 | A kind of outer core mold of bicycle freewheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207256728U (en) |
-
2017
- 2017-08-10 CN CN201720993646.3U patent/CN207256728U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180420 Termination date: 20200810 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |