CN2036930U - Speed change device for central axle of bicycle - Google Patents
Speed change device for central axle of bicycle Download PDFInfo
- Publication number
- CN2036930U CN2036930U CN 88213853 CN88213853U CN2036930U CN 2036930 U CN2036930 U CN 2036930U CN 88213853 CN88213853 CN 88213853 CN 88213853 U CN88213853 U CN 88213853U CN 2036930 U CN2036930 U CN 2036930U
- Authority
- CN
- China
- Prior art keywords
- gear
- speed change
- gear wheel
- central axle
- axle
- 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.)
- Pending
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- Gear-Shifting Mechanisms (AREA)
Abstract
The utility model discloses a speed change device for central axle of bicycle. A gear wheel and a sliding gear wheel are arranged on the right end of the central axle, a gear wheel axle sleeve is covered on the left end of the central axle, a carrier wheel is arranged on the gear wheel axle sleeve, which is also provided with a speed change operating mechanism and a splined axle provided with two gear wheels. The speed change purpose is achieved by the mesh and the separation among the central axle, the inner gear wheel and the outer gear wheel covered on the gear wheel axle sleeve covered on the right end of the central axle, the gear wheel on the right end of the central axle and the adjacent gear wheels on the splined axile. The utility model has the advantages of simple structure, long service life, and that the speed change device for central axle of bicycle is sensitive and reliable, and is applicable for various bicycles now.
Description
The utility model relates to a kind of bicycle middle shaft speed-changing device.
Existing derailleur is arranged on the rear axle, and chain needs to move on to another sprocket wheel from a sprocket wheel during speed change, and it is big to rub when mobile, and speed change is inconvenient and malfunctioning sometimes.
Task of the present utility model provides a kind of speed change sensitivity, reliable, easy to use, simple in structure, and chain does not need to move and be applicable to the transmission system of existing all kinds of bicycles.
Solution of the present utility model is: adorn a cliding gear and a gear on the right side of axis, overlap a sliding shaft sleeve on the left side.And also has a castellated shaft and the selector gear that two gears are housed.Sprocket wheel is assemblied on the gear bush.Selector gear is made up of duplex shift fork, shift fork, driving lever, gear, steel wire and support etc.Promote shifter bar, the gear that makes shift fork drive the castellated shaft left side by steel wire, shift fork and gear moves, make the gear mesh or the disengagement at itself and gear bush middle part, while duplex shift fork also drives the gear on the castellated shaft right side and the cliding gear on the axis moves, make its respectively with axis on gear and the internal gearing or the disengagement of gear bush, realize the purpose of speed change.
The utility model bicycle middle shaft speed-changing device need not to make the chain of running to move on to another sprocket wheel from a sprocket wheel during speed change, reduced because the friction between speed-changing chain and the sprocket wheel; The speed change sensitivity, reliable, long service life is applicable to existing all kinds of bicycles.
The utility model will be illustrated more clearly in from the accompanying drawing of the following example.
Fig. 1, the utility model bicycle middle shaft speed-changing device front view.
Fig. 2, the utility model bicycle middle shaft speed-changing device A-A section-drawing.
Fig. 3, the utility model bicycle middle shaft speed-changing device A is to view.
Bicycle middle shaft speed-changing device shown in Figure 1, gear (4) and cliding gear (5) are assemblied in the right side end of axis (2), gear bush (6) is contained in by two bearings on two axle journals of left side end of axis (2), at the both ends of axis (2) crank (1) is housed respectively.Sprocket wheel (3) is riveted on the external cylindrical surface of gear bush (6) left end.Gear (8) and gear (7) are contained on the castellated shaft (9) that is parallel to axis (2).Two pusher dogs of duplex shift fork (10) insert respectively in the circumferential groove of gear (7) and cliding gear (5), and its middle part is processed with the part of tooth bar and inserts in the bearing (15); The pusher dog of shift fork (11) inserts in the annulus cabinet of gear (8), and its middle part section of rack also inserts bearing (15), and the gear parts of its two shift fork all meshes with the gear (13) that is assemblied on the bearing (15).
Its operating principle is as follows: when promoting shifter bar, steel wire (14) makes shift fork (11) (or right) motion left by driving lever (12), pusher dog on the shift fork (11) makes gear (8) go up at castellated shaft (9) and slides, and makes the gear mesh or the disengagement at this gear and gear bush (6) middle part; By gear (13) two moving shift forks (10) are also moved in the time of shift fork (11) (or right) motion left, two pusher dog driven gears (7) and cliding gear (5) also move simultaneously on it, make the internal gearing or the disengagement of gear (7) and gear (4) and cliding gear (5) and gear bush (6) right-hand member, realize the purpose of speed change.Figure 1 shows that the top gear drive state.When move to left internal gearing with gear bush (6) right-hand member of cliding gear (5), and while gear (7) and gear (4), when gear (8) is out of gear with gear bush (6) middle part, motion is directly passed to sprocket wheel (3) by gear bush (6) by crank (1) through axis (2), obtains at a slow speed.
Claims (3)
1, a kind of bicycle middle shaft speed-changing device, sprocket wheel (3) is arranged, axis (2) and crank (1), it is characterized in that gear (4) and cliding gear (8) being housed on axis (2) right side, the left side is with gear bush (6), and the castellated shaft (9) and the selector gear of gear (7) and gear (8) are housed in addition.
2, bicycle middle shaft speed-changing device according to claim 1 is characterized in that sprocket wheel (3) is assemblied on the gear bush (6).
3, bicycle middle shaft speed-changing device according to claim 1 is characterized in that selector gear by duplex shift fork (10), shift fork (11), driving lever (12), gear (13), steel wire (14) and support compositions such as (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88213853 CN2036930U (en) | 1988-08-30 | 1988-08-30 | Speed change device for central axle of bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88213853 CN2036930U (en) | 1988-08-30 | 1988-08-30 | Speed change device for central axle of bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2036930U true CN2036930U (en) | 1989-05-03 |
Family
ID=4846888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88213853 Pending CN2036930U (en) | 1988-08-30 | 1988-08-30 | Speed change device for central axle of bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2036930U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102030073A (en) * | 2010-12-10 | 2011-04-27 | 徐志安 | Centre shaft four-speed transmission for bicycle |
-
1988
- 1988-08-30 CN CN 88213853 patent/CN2036930U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102030073A (en) * | 2010-12-10 | 2011-04-27 | 徐志安 | Centre shaft four-speed transmission for bicycle |
| CN102030073B (en) * | 2010-12-10 | 2013-05-01 | 徐志安 | Centre shaft four-speed transmission for bicycle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |