CN2160611Y - Automatic gearshift for changeable speed bicycle - Google Patents
Automatic gearshift for changeable speed bicycle Download PDFInfo
- Publication number
- CN2160611Y CN2160611Y CN 93217740 CN93217740U CN2160611Y CN 2160611 Y CN2160611 Y CN 2160611Y CN 93217740 CN93217740 CN 93217740 CN 93217740 U CN93217740 U CN 93217740U CN 2160611 Y CN2160611 Y CN 2160611Y
- Authority
- CN
- China
- Prior art keywords
- guide groove
- regulating block
- gear
- retracing spring
- rod
- 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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Abstract
The utility model relates to an automatic gearshift for a changeable speed bicycle, which is composed of a sensing gear, a gear stand, a guide groove, a clamping fixing piece, a regulating screw, a regulating block, and a reset spring. The utility model can make use of the tension variation of a bicycle chain and use the sensing gear to control the gearshift of a speed variator and automatically shift gear and change speed according to the resistance of road surface and accelerated state during the process of traveling, so that the functions of the changeable speed bicycle can be exerted in a maximum limit, the lifetime of the flywheel and the chain can be prolonged, and the physical strength of riders can be saved.
Description
The utility model relates to a kind of auto-shifting device of variable speed bicycle.
Now a lot of bicycles all are equipped with change-speed box, and this variable speed bicycle is being ridden when sailing as running into the equal variable-ratios of situation such as upward slope, descending, acceleration, to save muscle power.But this car must be pulled the control handgrip with hand by the rider, could drive the change-speed box steel wire and make the shifting of transmission speed change.In actual travel, because changeableization of road conditions needs buty shifting, very bother, and tend to have little time gear shift, so a lot of people does not want to take the trouble and do not use change-speed box, make it can not bring into play due effect.
The purpose of this utility model provides a kind of auto-shifting device of variable speed bicycle, makes variable speed bicycle can and add (subtracting) fast situation and autoshift, convenient again use of effect of continuing and giving full play to change-speed box according to surface resistance in the process of moving.
The utility model is to utilize the cycle chain tension variation to come the automatic guidance shifting of transmission.
Device of the present utility model by sensing gear, gear stand, guide groove, grip sheet, adjusting screw(rod), regulating block and retracing spring and constitute.Gear stand is positioned at the guide groove top, and the sensing gear is installed on the gear stand.When installing and using, the sensing gear contacts with cycle chain is meshing, in order to experience the tension variation of chain.The guide groove four sides all has the parallel long mouth, grips sheet and is arranged in guide groove, and long mouthful of both sides, guide groove front and back passed at its two ends respectively.During use, by gripping sheet this device is fixed on horizontal sticking behind the bicycle, guide groove can slide up and down with respect to gripping sheet.Adjusting screw(rod) one end passes the aperture of guide groove bottom, and extend in the aperture that grips the sheet bottom, and on adjusting screw(rod), retracing spring is enclosed within on the adjusting screw(rod) regulating block with the screw thread rotation set, between regulating block and guide groove bottom.Grip the sheet end one aperture that supplies the change-speed box steel wire to pass is arranged, on gear stand or guide groove top or bottom one change-speed box fixation with steel wire screw is arranged, when installing and using, the change-speed box steel wire passes the aperture that grips the sheet end and is fixed on this check screw, when guide groove slides up and down, can drive the change-speed box steel wire and carry out gear shift.
Can also add a recoil spring on adjusting screw(rod), this recoil spring one end heads on the guide groove bottom, and is relative with retracing spring with the guide groove bottom, and its force direction to the guide groove bottom is opposite with retracing spring.Should can the slip to guide groove cushion when the chain tension flip-flop towards spring, make its held stationary.
Different with the way of contact of cycle chain according to the sensing gear, the utility model device can have press-down type and two kinds of specific embodiment of last top formula.
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the press-down type structural representation of the utility model device.
Fig. 2 is the longitudinal profile structural representation of Fig. 1.
Fig. 3 is the last top formula structural representation of the utility model device.
Fig. 4 is the longitudinal profile structural representation of Fig. 3.
Installation site scheme drawing when Fig. 5 is the utility model use.
The structure of the utility model device of employing press-down type as depicted in figs. 1 and 2.Sensing gear (1) is loaded on the gear stand (13).When installing and using, sensing gear (1) is positioned at cycle chain (11) top, to pressing down chain (11) and meshing with it.Gear stand (13) is positioned at guide groove (2) top outer; This support can be carried out the back separately and be fixed on the guide groove top by holding screw (14) or alternate manner, also can be one-body molded with guide groove, for example can form by same sheetmetal bending machining with guide groove, and tighten reinforcing by holding screw (14) again.Guide groove (2) can be formed by the sheetmetal bending machining, and its two sides, left and right sides forms opening naturally, and the two sides, front and back has the parallel long mouth again.Grip sheet (3) and be upper and lower two, its two ends are stretched out long mouthful of two sides, guide groove (2) front and back respectively, and have bayonet socket (18), and guide groove can be slided up and down along it.Two grip sheet (3) and are fastened on behind the bicycle on the horizontal fork (10) by clamp screw (9), below one grip the sheet bottom and have one to stretch into the aperture (17) of location for adjusting screw(rod) (4).Adjusting screw(rod) (4) one ends pass the aperture (16) of guide groove bottom and extend in the aperture (17) that grips sheet, and grip the sheet riveting and connect, and free to rotate.Regulating block (7) is arranged in guide groove (2),, can move up and down with the rotation of adjusting screw(rod) on adjusting screw(rod) (4) with the screw thread rotation set.Retracing spring (5) is placed on the adjusting screw(rod), is positioned between regulating block (7) and guide groove (2) bottom, and the one end heads on regulating block, and the other end heads on the guide groove bottom downwards.Stretch out at adjusting screw(rod) (4) on the part of guide groove (2) bottom and be with recoil spring (6), there is a knob adjusting screw(rod) lower end, so that rotate adjusting screw(rod), recoil spring one end heads on this knob, and the other end upwards heads on the guide groove bottom.There is an aperture (8) outer end that grips sheet (3), and change-speed box fixation with steel wire screw (15) is positioned at gear stand (13) bottom.
The structure of the utility model device of top formula as shown in Figure 3 and Figure 4 in the employing.Regulating block (7) and retracing spring (5) are positioned at guide groove (2) outside, and retracing spring one end heads on regulating block, and the other end upwards heads on the guide groove bottom.Recoil spring (6) is arranged in guide groove (2), and the one end heads on and grips sheet (3), and the other end heads on the guide groove bottom downwards.When installing and using, sensing gear (1) is positioned at the below of cycle chain (11), upwards heads on chain and meshing with it.Other architectural feature is identical with press-down type structure illustrated in figures 1 and 2.
The length of the guide groove of the utility model device (2) can be decided according to horizontal distance of pitching its top chain behind the bicycle, is generally 10～20 centimetres.Retracing spring (5) is positioned at guide groove (2) outside when going up top formula structure owing to adopt, so the length of its guide groove can be done more a bit than the weak point of press-down type.
When device of the present utility model uses, this device is fixed on horizontal sticking behind the bicycle, makes sensing gear (1) press (or top) cycle chain (11) and meshing with it by gripping sheet (3); Rotation adjusting screw(rod) (4) makes on the regulating block (7) and moves or move down, and acts on the elastic force of guide groove (2) bottom to suitable size to regulate retracing spring (5); At this moment, the sensing gear presses down chain (or going up the top) one-tenth " ∨ " (or " ∧ ") font; An end that the change-speed box steel wire was connected to originally the control handgrip passes the aperture (8) that grips on the sheet (3), and tension is affixed on the check screw (15).Rotate adjusting screw(rod) (4) and change the application force of retracing spring (5), guide groove is moved up or down, can drive the change-speed box steel wire change-speed box is transferred to gear (being called for short at the uniform velocity shelves) required when at the uniform velocity travelling guide groove.When cycling, chain (11) two ends are subjected to opposite power effect and produce tension force.When at the uniform velocity travelling, tension force of chain (11) (with the power of lifting or pressing down on the sensing gear) and retracing spring (5) are in state of equilibrium to the elastic force (power that the sensing gear is pressed down or upward push up) of guide groove (2), at this moment chain keeps not riding " ∨ " (or " ∧ ") font when sailing, and Transmission gear is on the predefined at the uniform velocity shelves.When starting, upward slope or acceleration, the stressed change in chain two ends is big, chain tension increases, " ∨ " (or " ∧ ") font is stretched, will lift (or pressing down) on the sensing gear and make guide groove upwards (or downwards) slide, thereby driving the change-speed box steel wire changes slow shelves into, when surface resistance or quicken when big more, chain tension is big more, and the distance of guide groove slip and drive change-speed box steel wire is also big more, and change-speed box just is replaced by slow more gear.When descending or when slowing down, the chain two ends are stressed to diminish, and tension force reduces, retracing spring elastic force effect lower guide channel downwards (or upwards) slide, drive the change-speed box steel wire and change at the uniform velocity shelves into or prevent that pin from staring at the fast shelves of idle running.
Device of the present utility model is controlled shifting of transmission owing to utilize chain tension to change, so, can be in the driving process and the autoshift speed change according to the situation of surface resistance and acceleration, and can set the gear that at the uniform velocity travels in the level land on demand, thereby the function of variable speed bicycle is brought into play to greatest extent, and can prolong life-span of flywheel and chain, save rider's muscle power.
Claims (4)
1, a kind of variable speed bicycle auto-shifting device, it is characterized in that this device by sensing gear (1), gear stand (13), guide groove (2), grip sheet (3), adjusting screw(rod) (4), retracing spring (5) and regulating block (7) constitutes; Gear stand (13) is positioned at guide groove (2) top, and sensing gear (1) is contained on this gear stand; Guide groove (2) four sides all has the parallel long mouth, grips sheet (3) and is arranged in guide groove (2), and long mouthful of both sides, guide groove front and back passed at its two ends respectively, and guide groove can slide up and down with respect to gripping sheet; Adjusting screw(rod) (4) one ends pass the aperture (16) of guide groove bottom, extend in the aperture (17) that grips sheet (3) bottom, regulating block (7) with the screw thread rotation set on adjusting screw(rod) (4), retracing spring (5) is enclosed within on the adjusting screw(rod) (4), is positioned between regulating block (7) and guide groove (2) bottom; Gripping has an aperture (8) that passes for the change-speed box steel wire on sheet (3) end, go up or a change-speed box fixation with steel wire screw (15) is arranged at guide groove (2) top or bottom at gear stand (13).
2, according to the described device of claim 1, it is characterized in that on adjusting screw(rod) (4), also being with a recoil spring (6), this recoil spring one end heads on guide groove (2) bottom, and is relative with retracing spring (5) with the guide groove bottom.
3, according to claim 1 or 2 described devices, it is characterized in that regulating block (7) and retracing spring (5) are arranged in guide groove (2), retracing spring (5) one ends head on regulating block, and the other end heads on the guide groove bottom downwards.
4, according to claim 1 or 2 described devices, it is characterized in that regulating block (7) and retracing spring (5) are positioned at the outside of guide groove (2), retracing spring (5) one ends head on regulating block, and the other end upwards heads on the guide groove bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93217740 CN2160611Y (en) | 1993-07-02 | 1993-07-02 | Automatic gearshift for changeable speed bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93217740 CN2160611Y (en) | 1993-07-02 | 1993-07-02 | Automatic gearshift for changeable speed bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2160611Y true CN2160611Y (en) | 1994-04-06 |
Family
ID=33797595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93217740 Expired - Fee Related CN2160611Y (en) | 1993-07-02 | 1993-07-02 | Automatic gearshift for changeable speed bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2160611Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107600896A (en) * | 2017-09-28 | 2018-01-19 | 东莞市松研智达工业设计有限公司 | A kind of chain and sprocket driving device for reducing fluctuation transmission variable-ratio |
-
1993
- 1993-07-02 CN CN 93217740 patent/CN2160611Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107600896A (en) * | 2017-09-28 | 2018-01-19 | 东莞市松研智达工业设计有限公司 | A kind of chain and sprocket driving device for reducing fluctuation transmission variable-ratio |
| CN107600896B (en) * | 2017-09-28 | 2018-08-07 | 广州世通汽车部件有限公司 | A kind of chain and sprocket driving device reducing fluctuation transmission variable-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 |