CN2357995Y - Speed changer - Google Patents
Speed changer Download PDFInfo
- Publication number
- CN2357995Y CN2357995Y CN 98232260 CN98232260U CN2357995Y CN 2357995 Y CN2357995 Y CN 2357995Y CN 98232260 CN98232260 CN 98232260 CN 98232260 U CN98232260 U CN 98232260U CN 2357995 Y CN2357995 Y CN 2357995Y
- Authority
- CN
- China
- Prior art keywords
- wheel
- sun wheel
- bearing pin
- crank
- change
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 230000010354 integration Effects 0.000 abstract 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 241001232809 Chorista Species 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
Images
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- Structure Of Transmissions (AREA)
- Transmission Devices (AREA)
Abstract
The utility model relates to a speed changer, particularly a speed changer used as a transmission mechanism for bicycles, comprising a crank and a chain wheel. The utility model is characterized in that the crank is connected with a sun wheel, the chain wheel and a driving disk form integration, a pin shaft is distributed on the driving disk, a planet wheel arranged on the pin shaft is positioned between the sun wheel and an inner gear ring, the inner gear ring and the movable end of a clutch form integration, the fixed end of the clutch and a frame form integration, and the sun wheel and the planet wheel are firstly connected into a rigid body by an elastic ring through the pin shaft. The speed changer has the advantages of simple and compact structure, high reliability, etc. The utility model can conveniently refit the existing bicycles.
Description
The utility model relates to a kind of change-speed box, especially is used as the change-speed box of transmission mechanism of bicycle.
Existing bicycle speed-varying unit comprises crank and sprocket wheel (also having only a few to adopt belt-driving) at least, and its speed change is to realize by changing the position of chain on the driving and driven sprocket wheel of different-diameter.This structure is not only complicated, and reliability is also poor.
First purpose of the present utility model is to provide a kind of change-speed box, and it can not only realize the variation of speed ratio with better simply structure, and more reliable.
Second purpose of the present utility model is to provide a kind of change-speed box, and it can reequip the transmission device of existing bicycle more conveniently.
The technical scheme that realizes the utility model purpose is: a kind of change-speed box, especially be used as the change-speed box of transmission mechanism of bicycle, comprise: crank and sprocket wheel, its distinctive feature is: crank is connected with sun wheel, sprocket wheel and driving disk constitute one, be distributed with bearing pin on the driving disk, be contained in satellite gear on the bearing pin between sun wheel and internally toothed annulus, the moved end of internally toothed annulus and power-transfer clutch constitutes one, the fixed end of power-transfer clutch and vehicle frame constitute one, and elastic ring is unified into a rigid body by bearing pin in advance with sun wheel and satellite gear.
And power-transfer clutch can be a roller-type overrunning clutch, and elastic ring is around bearing pin and limit the axial location of satellite gear.
In this formation, when the bicycle flat pavement running, because moment of torsion is less, elastic ring can be unified into a rigid body with sun wheel and satellite gear in advance by bearing pin, and sun wheel, satellite gear, internally toothed annulus (containing the power-transfer clutch moved end) and sprocket wheel constitute an integral body, and promptly speed ratio is constant.When meeting resistance (as going up a slope) when travelling, drive wheel is passed through in the increase of its moment of torsion, chain, sprocket wheel, driving disk, satellite gear and sun wheel pass to crank, it is to produce relative rotation between sun wheel and the satellite gear that the bearing pin of the feasible sun wheel that is connected with crank struts elastic ring, meanwhile, the moment of torsion of this increase also desires to make the moved end of power-transfer clutch to do clockwise direction rotation (on position shown in Figure 3), so the moved end of power-transfer clutch is fixed with internally toothed annulus (relative vehicle frame), so, sun wheel, the rigid body that is unified in advance between the satellite gear promptly is disengaged, because sun wheel, form between the satellite gear and relatively rotate, thereby sprocket wheel just constitutes the planetary reduction gear transmission relatively, and its reduction ratio can reach 1: 3.The utlity model has simple in structure, compactness and reliability advantages of higher.Owing to do not relate to the change of (back) drive wheel, structurally can reequip existing bicycle easily again.
The utility model is described in further detail below with reference to accompanying drawing.
Fig. 1 is the integrally-built cutaway view of this change-speed box of signal.
Fig. 2 is the cutaway view along Figure 1A-A place.
Fig. 3 is the cutaway view along Figure 1B-B place.
With reference to Fig. 1～Fig. 3, this change-speed box comprises crank 1 and sprocket wheel 2, described crank 1 is connected with sun wheel 8, its connection mode can be screw thread or key, sprocket wheel 2 constitutes one with driving disk 10, be distributed with bearing pin 12 on the driving disk 10, be contained in satellite gear 11 on the bearing pin 12 between sun wheel 8 and internally toothed annulus 3, internally toothed annulus 3 constitutes one with the moved end 7 of power-transfer clutch 6, the fixed end 5 of power-transfer clutch 6 constitutes one with vehicle frame 13, and elastic ring 4 is unified into a rigid body by bearing pin 9,12 in advance with sun wheel 8 and satellite gear 11.
Wherein, described " formation one " mean and make one, or make on two and with attaching parts the two is linked into an integrated entity behind the chorista.
Described power-transfer clutch 6 can be a roller-type overrunning clutch, and its moved end 7 is star-wheel (referring to " mechanical engineering manual " China Machine Press nineteen eighty-two version, the 28th piece the 90th page).Elastic graph 4 can by be similar to mode shown in Figure 2 around bearing pin 9,12 so that sun wheel 8 and satellite gear 11 are unified into a rigid body in advance.Meanwhile, elastic ring 4 also limits the position of satellite gear 11 in the axial direction, to prevent its end float misalignment.
Claims (2)
1, a kind of change-speed box, especially be used as the change-speed box of transmission mechanism of bicycle, comprise crank [1] and sprocket wheel [2], it is characterized in that: crank [1] is connected with sun wheel [8], sprocket wheel [2] constitutes one with driving disk [10], be distributed with bearing pin [12] on the driving disk [10], the satellite gear [11] that is contained on the bearing pin [12] is positioned between sun wheel [8] and the internally toothed annulus [3], internally toothed annulus [3] constitutes one with the moved end [7] of power-transfer clutch [6], the fixed end [5] of power-transfer clutch [6] constitutes one with vehicle frame [13], and elastic ring [4] is by bearing pin [9,12] sun wheel [8] and satellite gear [11] are unified into a rigid body in advance.
2, change-speed box according to claim 1 is characterized in that: power-transfer clutch [6] is a roller-type overrunning clutch, and elastic ring [4] is around bearing pin [9,12] and limit the axial location of satellite gear [11].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98232260 CN2357995Y (en) | 1998-12-25 | 1998-12-25 | Speed changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98232260 CN2357995Y (en) | 1998-12-25 | 1998-12-25 | Speed changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2357995Y true CN2357995Y (en) | 2000-01-12 |
Family
ID=33981296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98232260 Expired - Fee Related CN2357995Y (en) | 1998-12-25 | 1998-12-25 | Speed changer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2357995Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105722754A (en) * | 2013-10-16 | 2016-06-29 | 菲戈尔有限公司 | Crank assembly for increasing rotation ratio |
-
1998
- 1998-12-25 CN CN 98232260 patent/CN2357995Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105722754A (en) * | 2013-10-16 | 2016-06-29 | 菲戈尔有限公司 | Crank assembly for increasing rotation ratio |
| CN105722754B (en) * | 2013-10-16 | 2019-03-01 | 菲戈尔有限公司 | Crank assembly with increased rotation ratio |
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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 |