CN206984250U - Movable bike chain wheel speed change gear - Google Patents
Movable bike chain wheel speed change gear Download PDFInfo
- Publication number
- CN206984250U CN206984250U CN201720930143.1U CN201720930143U CN206984250U CN 206984250 U CN206984250 U CN 206984250U CN 201720930143 U CN201720930143 U CN 201720930143U CN 206984250 U CN206984250 U CN 206984250U
- Authority
- CN
- China
- Prior art keywords
- disc board
- chain wheel
- wheel
- shaped frame
- wheel disc
- 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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- Transmissions By Endless Flexible Members (AREA)
Abstract
It the utility model is related to a kind of movable bike chain wheel speed change gear, including taking turns disc board, one cam is provided with by axis of rotation at the middle part of the wheel disc board, in the periphery of the wheel disc board, four chain wheels of installation slided along the circumferencial direction of wheel disc board, circular chain drum is formed after four chain wheel docking, each chain wheel is driven by drive mechanism corresponding to one, and described cam is driven by speed governing line.The utility model has the advantages that：The drawbacks of overcoming traditional speed adjusting gear, simple in construction, speed governing is light, it is possible to achieve fine setting.
Description
Technical field
It the utility model is related to a kind of movable bike chain wheel speed change gear.
Background technology
It is laterally to dial chain mostly by present bicycle wheel disc conversion, the different chain wheel of multilayer size diameter is alternately become
Change and realize speed change, or be made up of many gear structures, complicated, speed governing is laborious.
The content of the invention
The defects of to overcome prior art, the utility model provide a kind of movable bike chain wheel speed change gear, this practicality
New technical scheme is：
Movable bike chain wheel speed change gear, including wheel disc board, pass through axis of rotation in the middle part of the wheel disc board
A cam is installed, in the periphery of the wheel disc board, four chain wheels of installation for being slided along the circumferencial direction of wheel disc board, four
Circular chain drum is formed after chain wheel docking, each chain wheel is driven by drive mechanism corresponding to one, and described cam passes through speed governing
Line drives.
The drive mechanism includes U-shaped frame, locating piece and spring, and the openend of the U-shaped frame is arranged on the inner side of chain wheel,
And the U-shaped frame and the dynamic cooperation of cam, it is slidably mounted on wheel disc board, a positioning is installed on the wheel disc board in U-shaped frame
Block, a spring is installed between the locating piece and U-shaped frame, spine bar is provided with the outside of the U-shaped frame, take turns and set on disc board
Have and driven with the dynamic ratchet coordinated of spine bar, the ratchet by projection, described projection is arranged on speed governing line.
The utility model has the advantages that：The drawbacks of overcoming traditional speed adjusting gear, simple in construction, speed governing is light, Ke Yishi
Now finely tune.
Brief description of the drawings
Fig. 1 is agent structure schematic diagram of the present utility model.
Embodiment
The utility model is further described with reference to specific embodiment, and the advantages of the utility model and feature will be with
Description and it is apparent.But these embodiments are only exemplary, do not form any restrictions to the scope of the utility model.
It will be understood by those skilled in the art that can be to the utility model skill under without departing from spirit and scope of the present utility model
The details and form of art scheme are modified or replaced, but these modifications and replacement each fall within the scope of protection of the utility model
It is interior.
Referring to Fig. 1, a kind of movable bike chain wheel speed change gear, including wheel disc board 6 are the utility model is related to, described
The middle part of wheel disc board 6 is provided with a cam 7 by what rotating shaft 9 rotated,（Torsion spring is installed between the cam and rotating shaft, it is convenient
Cam return）, in the periphery of the wheel disc board 6, along four chain wheels 1 of installation of the circumferencial direction slip of wheel disc board 6, four teeth
Disk 1 forms circular chain drum after docking, and each chain wheel 1 is driven by drive mechanism corresponding to one, and described cam 7 passes through speed governing
Line 4 drives.
The drive mechanism includes U-shaped frame 10, locating piece 12 and spring 11, and the openend of the U-shaped frame 10 is arranged on tooth
The inner side of disk 1, and the U-shaped frame 10 and the dynamic cooperation of cam 4, are slidably mounted on wheel disc board 6, the wheel disc base in U-shaped frame 10
A positioning block 12 is installed on plate 6, a spring 11 is installed between the locating piece 12 and U-shaped frame 10, in the outer of the U-shaped frame 10
Side is provided with spine bar 5, takes turns the ratchet 3 being provided with disc board 6 with the dynamic cooperation of spine bar 5, the ratchet 3 is driven by projection 8, described
Projection 8 be arranged on speed governing line 4 on.
Operation principle of the present utility model is：During wheel disc substrate rotating, four chain wheels are driven to rotate, a speed governing line driving
Cam and projection, when speed governing line pulls out, cam outwards ejects U-shaped frame, and then promotes chain wheel to be displaced outwardly, and 4 chain wheels are successively
Released by cam, projection at this moment leaves ratchet, ratchet blocks spine bar when speed governing line pulls out；When speed governing line discharges, cam
Reset, when now projection moves inwardly into ratchet with speed governing line, touching ratchet makes it discharge spine bar, and chain wheel is under the action of the spring
Return, with the rotation of rotating shaft, 4 chain wheels return successively.
Claims (2)
1. movable bike chain wheel speed change gear, it is characterised in that including taking turns disc board, pass through in the middle part of the wheel disc board
Axis of rotation is provided with a cam, in the periphery of the wheel disc board, along the installation four of the circumferencial direction slip of wheel disc board
Chain wheel, circular chain drum is formed after four chain wheel docking, each chain wheel is driven by drive mechanism corresponding to one, described cam
Driven by speed governing line.
2. movable bike chain wheel speed change gear according to claim 1, it is characterised in that the drive mechanism includes U
Shape frame, locating piece and spring, the openend of the U-shaped frame is arranged on the inner side of chain wheel, and the U-shaped frame and the dynamic cooperation of cam, sliding
Dynamic is arranged on wheel disc board, is provided with a positioning block on the wheel disc board in U-shaped frame, pacifies between the locating piece and U-shaped frame
Equipped with a spring, spine bar is provided with the outside of the U-shaped frame, takes turns the ratchet being provided with disc board with the dynamic cooperation of spine bar, should
Ratchet is driven by projection, and described projection is arranged on speed governing line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720930143.1U CN206984250U (en) | 2017-07-28 | 2017-07-28 | Movable bike chain wheel speed change gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720930143.1U CN206984250U (en) | 2017-07-28 | 2017-07-28 | Movable bike chain wheel speed change gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206984250U true CN206984250U (en) | 2018-02-09 |
Family
ID=61417584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720930143.1U Expired - Fee Related CN206984250U (en) | 2017-07-28 | 2017-07-28 | Movable bike chain wheel speed change gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206984250U (en) |
-
2017
- 2017-07-28 CN CN201720930143.1U patent/CN206984250U/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: 20180209 Termination date: 20200728 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |