CN2305362Y - Automatic speed changing wheel disc for bicycle - Google Patents
Automatic speed changing wheel disc for bicycle Download PDFInfo
- Publication number
- CN2305362Y CN2305362Y CN 97219554 CN97219554U CN2305362Y CN 2305362 Y CN2305362 Y CN 2305362Y CN 97219554 CN97219554 CN 97219554 CN 97219554 U CN97219554 U CN 97219554U CN 2305362 Y CN2305362 Y CN 2305362Y
- Authority
- CN
- China
- Prior art keywords
- wheel disc
- inner gear
- outer shroud
- side cover
- ratchet
- 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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- Structure Of Transmissions (AREA)
- Transmission Devices (AREA)
Abstract
The utility model belongs to an automatic speed changing wheel disc for a bicycle used for bicycles or other manpower vehicles. In order to solver the disadvantages of complex structure, inconvenience, etc. of an existing bicycle speed changing mechanism, the utility model is developed. The utility model is composed of a crank, a planetary gear mechanism, a wheel disc, a side cover, etc. The utility model can be arranged on manpower vehicles of a bicycle, etc. Mechanisms of a ratchet, etc. can be used for determining and changing the moving states of a planetary gear, so that the goal of automatically changing the running speed of the bicycle is achieved. The speed changing wheel disc has compact structure, small volume and flexible speed change; the utility model can be used for other manpower vehicles.
Description
The utility model belongs to that human powered vehicle such as bicycle uses, the automatic speed-transformation of bicycle wheel disc of system of vehicle transmission ratio capable of automatic changing.
Human powered vehicles such as bicycle when meeting different road surface, for laborsaving, should change the transmitting ratio of its chain sprocket drive, to adapt to the needs of riding at any time in the process of travelling.(patent No. is Chinese patent: the transmission system of a kind of " automatic speed changing wheel disc " is provided 95206235.6), has preferably resolved this problem.It is made up of wheel disc shell, wheel disc core, ratchet, gear and planetary wheel etc.When stepping the crank of wheel disc forward, the wheel disc core is checked and regulated body by the ratchet device driven wheel and is rotated, and makes vehicle to overtake; When stepping the crank of wheel disc backward, the gear on the wheel disc core drives wheel disc by planetary wheel, makes vehicle with slower speed to overtake, thereby has changed the moving velocity of vehicle.Since when this device becomes low speed driving in the process of riding, be to step crank backward to advance, different with the mode of riding normally, make troubles to the user, also directly influenced promoting the use of of it.
The utility model is according to the deficiencies in the prior art and a kind of convenience of design-calculated, suitable, the automatic speed-transformation of bicycle wheel disc of human powered vehicle transmitting ratios such as bicycle capable of automatic changing.
The utility model is realized by following measure.The automatic speed changing wheel disc mainly is made up of crank, planetary gear mechanism, wheel disc and side cover etc.Sun gear with the planetary wheel external toothing in the planetary gear mechanism is fixedly mounted on the crank, and wheel disc and side cover are housed respectively on the shoulder of these gear both sides, and planetary wheel that is meshed with sun gear and outer shroud inner gear are between wheel disc and side cover.Planetary wheel rectangular distribution more than three, and be fixed on wheel disc and the side cover by axle (bolt).The external diameter of side cover is greater than the tooth root dia of outer shroud inner gear, less than the external diameter of outer shroud inner gear.Near on the end face of side cover one side, an inner gear ratchet is housed at the outer shroud inner gear, this ratchet can be meshed with a ratchet slot on the side cover circumference.A fixed pawl is housed on cycle frame, and this ratchet is opposite with inner gear ratchet installation direction on the outer shroud inner gear.When the automatic speed changing wheel disc returns the back commentaries on classics, the inner gear ratchet on the inner gear can be lifted.On the circumference of outer shroud inner gear,, the plane overriding clutch of being made up of spring leaf and steel ball etc. is housed evenly with the wheel disc touching position.
When the bicycle cruising, step crank forward, the inner gear ratchet on this moment outer shroud inner gear is meshed with the ratchet slot on the side cover, the outer shroud inner gear with fix planetary side cover and wheel disc and do not have relative motion, change wheel is checked and regulated body and is rotated forward with speed, and bicycle to overtake.When riding resistance is big when needing speed change, step the certain angle of crank backward, this moment, wheel disc rotated backward together by plane overriding clutch drive outer shroud inner gear, when the inner gear ratchet on the outer shroud inner gear forwards to when fixed pawl on the vehicle frame contacts, the fixed pawl on the vehicle frame lifts the inner gear ratchet on the outer shroud inner gear and locate.Step crank more forward, because outer shroud inner gear and side cover break away from, and by the location of the fixed pawl on the vehicle frame, crank drives sun gear, planetary wheel rotation, and side cover and wheel disc are under planetary drive, and low speed rotation has forward reached the purpose of speed change.When riding resistance reduced the speed of a motor vehicle and increases, outer shroud inner gear rotating speed improved, and inner gear ratchet and fixed pawl break away from automatically, and was meshed with ratchet slot on the side cover again, transferred cruising to.
The utility model has the advantages that, ride conveniently, speed change flexibly, the compact conformation volume is little, and may be used on other human powered vehicle.
Accompanying drawing 1 is a structure cross-sectional schematic of the present utility model, and accompanying drawing 2 is the cutaway view of plane overriding clutch, and accompanying drawing 3 is an outward appearance lateral plan of the present utility model.(1) is wheel disc among the figure; (2) be the outer shroud inner gear; (3) be side cover; (4) be compensating-gear shaft; (5) be planetary wheel; (6) be sun gear; (7) be the inner gear ratchet; (8) be pawl axis; (9) be crank; (10) be fixed pawl (this part is contained on the vehicle frame of bicycle); (11) be spring; (12) be steel ball; (13) be screw; (14) be spring leaf; (15) be spring.
Below in conjunction with a description of drawings embodiment of the present utility model.
Be fixedly mounted on the crank (9) at sun gear of the present utility model (6), be slidingly fitted with wheel disc (1) and side cover (3) on the shoulder of sun gear respectively, planetary wheel (5) that is meshed with sun gear (6) and outer shroud inner gear (2) are positioned between wheel disc (1) and the side cover (3).Four planetary wheels (5) rectangular distribution, and be fixed on wheel disc (1) and the side cover (3) by compensating-gear shaft (4).The external diameter of side cover (3) is greater than the tooth root dia of outer shroud inner gear (2), less than the external diameter of outer shroud inner gear.Near on the end face of side cover (3) one sides, an inner gear ratchet (7) is housed at outer shroud inner gear (2).This ratchet can be meshed with a ratchet slot on side cover (3) circumference.A fixed pawl (10) is housed on the vehicle frame of bicycle, and the installation direction of the inner gear ratchet (7) on this ratchet and the outer shroud inner gear (2) is opposite, when the automatic speed changing wheel disc rotates backward, the ratchet on the inner gear can be lifted.On the circumference of outer shroud inner gear (2), the plane overriding clutch is housed with wheel disc (1) touching position.The plane overriding clutch is made up of steel ball (12), spring leaf (14) and spring (15) etc., is fixed on the circumference of outer shroud inner gear (2) by screw (13); Steel ball (12) is positioned at the space between wheel disc (1), outer shroud inner gear (2) and the spring leaf (14).
When stepping crank (9) forward when travelling, inner gear ratchet (7) on the outer shroud inner gear (2) is meshed with ratchet slot on the side cover (3), outer shroud inner gear (2) and fixedly do not have relative motion between the side cover (3) of planetary wheel (5) and the wheel disc (1), change wheel is checked and regulated body and is rotated forward with speed, and bicycle to overtake.When riding resistance is big when needing speed change, step the certain angle of crank (9) backward, wheel disc (1) drives outer shroud inner gear (2) by steel ball on the overriding clutch of plane (12) and spring leaf (14) and rotates backward together.When inner gear ratchet (7) forward to vehicle frame on fixed pawl (10) when contacting, fixed pawl (10) lifts inner gear ratchet (7) and locate.Step crank (9) more forward, because outer shroud inner gear (2) and side cover (3) disengaging, and the ratchet that is fixed (10) location; Crank (9) drives sun gear (6), planetary wheel (5) rotates, and side cover (3) and wheel disc (1) are under the drive of planetary wheel (5), and low speed rotation has forward reached the purpose of speed change.When riding resistance reduced, inner gear ratchet (7) and fixed pawl (10) broke away from, and were meshed with ratchet slot on the side cover (3), transferred cruising automatically to.
Claims (2)
1, a kind of automatic speed-transformation of bicycle wheel disc, form by crank, planetary gear mechanism, wheel disc and side cover etc., it is characterized in that: the sun gear of said planetary gear mechanism (6) is fixedly mounted on the crank (9), and wheel disc (1) and side cover (3) are housed respectively on the shoulder of sun gear; Planetary wheel (5) that is meshed with sun gear (6) and outer shroud inner gear (2) are positioned between wheel disc (1) and the side cover (3); Planetary wheel more than three (5) rectangular distribution, and be fixed on wheel disc (1) and side cover (3) by compensating-gear shaft (4); The external diameter of side cover (3) is greater than the tooth root dia of outer shroud inner gear (2), less than the external diameter of outer shroud inner gear; Near on the end face of side cover (3) one sides, an inner gear ratchet (7) is housed at outer shroud inner gear (2); This ratchet can be meshed with a ratchet slot on side cover (3) circumference; A fixed pawl (10) is housed on the vehicle frame of bicycle, and the installation direction of the inner gear ratchet (7) on this ratchet and the outer shroud inner gear (2) is opposite; When the automatic speed changing wheel disc rotates backward, the ratchet on the inner gear can be lifted; On the circumference of outer shroud inner gear (2),, the plane overriding clutch is housed with wheel disc (1) touching position.
2, automatic speed-transformation of bicycle wheel disc according to claim 1, it is characterized in that: said plane overriding clutch is by steel ball (12), spring leaf (14) and spring compositions such as (15), be fixed on the circumference of outer shroud inner gear (2) by screw (13), steel ball (12) is positioned at the space between wheel disc (1), outer shroud inner gear (2) and the spring leaf (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97219554 CN2305362Y (en) | 1997-07-28 | 1997-07-28 | Automatic speed changing wheel disc for bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97219554 CN2305362Y (en) | 1997-07-28 | 1997-07-28 | Automatic speed changing wheel disc for bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2305362Y true CN2305362Y (en) | 1999-01-27 |
Family
ID=33935524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97219554 Expired - Fee Related CN2305362Y (en) | 1997-07-28 | 1997-07-28 | Automatic speed changing wheel disc for bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2305362Y (en) |
-
1997
- 1997-07-28 CN CN 97219554 patent/CN2305362Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |