CN2151942Y - Speed changing chain device for bicycle - Google Patents
Speed changing chain device for bicycle Download PDFInfo
- Publication number
- CN2151942Y CN2151942Y CN 93201379 CN93201379U CN2151942Y CN 2151942 Y CN2151942 Y CN 2151942Y CN 93201379 CN93201379 CN 93201379 CN 93201379 U CN93201379 U CN 93201379U CN 2151942 Y CN2151942 Y CN 2151942Y
- Authority
- CN
- China
- Prior art keywords
- slide block
- chain
- tray deck
- sprocket wheel
- 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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Abstract
The utility model provides a speed changing sprocket device for bicycles, comprising a composite sprocket disc, a chain guard, a speed changing shifting fork, a speed changing operation handle, etc. The utility model has the advantages of small size, a plurality of speed ratio, convenient operation, good meshing engagement because the sprocket and a chain always position at a same working plane, flexibility, labor saving, etc. Compared with prior art, the utility model improves the performance property, largely lowers manufacture cost, and can be used for the chain drive system of low speed.
Description
The utility model relates to a kind of bicycle shift chain gear apparatus.
The chain wheel set that known bicycle shift sprocket wheel is made up of the coaxial sprocket wheel that differs in size is adjusted the chain position, and it is meshed respectively with different sprocket wheel, can realize the purpose of speed change.The chain wheel set of this device takes up room greatly; During speed change, between different sprocket wheels, shift the chain of state of kinematic motion its operating difficulties; When drive sprocket and driven sprocket during not on same plane, chain is distorted, and takes off chain easily, and friction force increases; The variable-speed ratio number is subjected to the restriction of sprocket wheel quantity.
The purpose of this utility model is to provide that a kind of volume is little, speed ratio is many, easy to operate, sprocket wheel and chain be in all the time engagement on the same working face good, brisk labour-saving bicycle shift chain gear apparatus.
The utility model provides is used to realize that a kind of bicycle shift chain gear apparatus of above-mentioned purpose comprises combination chain wheel disc, retaining chain drum, gear shift fork and variable speed operation handle, and its architectural feature is
A, described combination chain wheel disc comprise tray deck, fan sprocket wheel, slide block, slide block steady arm,
B, be installed in the tray deck on the transmission shaft, this dish is provided with at least three slideways, and these slideways are radial rectangular distribution around the tray deck axle center,
C, a slide block is housed in each slideway, a slide block steady arm and a slice fan sprocket wheel all is housed on each slide block,
D, be installed near the gear shift fork that is positioned on the car body tray deck, be subjected to the traction of variable speed operation handle and control and move,
E, carry out chain when rotating at the combination chain wheel disc, fan sprocket wheel on certain slide block separates the back before contact chain once more with chain, steady arm on the respective slide can effectively contact with shift fork, thereby the stepping in slideway of this slide block is moved, during each sequential slider process shift fork position, move do stepping one by one.
F, with the retaining chain drum of tray deck secured in parallel, fan sprocket wheel and messenger chain folder thereof are limit between two cards.
Said fan sprocket wheel is in the same plane parallel with tray deck, and sprocket distributes in the periphery, and its covering of the fan symmetrical center line is passed through the tray deck axle center all the time, can entad close up into a complete round sprocket wheel on tray deck.
Said slide block steady arm comprises the location ratchet that is installed on the slide block, with the speed change toggle of ratchet interlock and compress the elastic component of ratchet and be installed on the tray deck can with the location ratchet bar of the good interlock of location ratchet, when toggle is subjected to the gear shift fork pushing, deflect earlier, the interlock ratchet, overcome elasticity elastic force, make ratchet break away from the location ratchet bar, promote then slide block and the fan sprocket wheel move along slideway, when the speed change toggle with after shift fork separates, under the elastic component effect, ratchet again with the ratchet bar interlock, realize locating after the speed change, after each slide block is finished identical displacement successively and reorientated, one time speed-change process finishes, and all the fan sprocket wheels on the combination chain wheel disc still can be with transmission chain good engagement in chain-driving.Said slide block steady arm also can adopt leading screw and nut mechanism, and can make all fan sprocket wheels still can be with transmission chain good engagement in chain-driving.
Slideway on the said tray deck, when tray deck is installed on the foot-operated axis as driving wheel, its slideway number value 4 or 6, foot-operated handle is near the angular bisector position of angle of two adjacent slideway line of centerss, can make stretcher in making the circular movement process, in the time of near the highs and lows position, the resistance arm minimum on the tray deck meets firmly being accustomed to of people.
According to said structure, when each fan sprocket wheel opens successively or closes up, be equal to the effect that the sprocket wheel pitch diameter changes on tray deck, realize the purpose of speed change.
Device described in the utility model needs chain stretching device and is used.
Compare with prior art, the utlity model has following beneficial effect:
Said apparatus is because each fan sprocket wheel is in the same plane all the time, so that it takes up room is little; Fork does not contact chain during speed change, only contacts with each slide block moment successively, and tray deck whenever circles, and can finish speed change one time, so it is simple to operate and can not take off chain; The variation range of speed ratio is directly proportional with slideway length, thereby more speed ratio and bigger speed range can be provided; Its peripheral profile was the non-garden curve that seamlessly transits when the fan sprocket wheel opened, and in conjunction with people's firmly custom, arranged the position of foot-operated handle, can realize brisk labour-saving purpose.
The utility model is described in further detail below in conjunction with drawings and Examples:
Present embodiment be have four fan sprocket wheels on the bicycle middle shaft when this device is installed in, the slide block steady arm adopts ratchet and the example during the ratchet bar structure.
Fig. 1 is the Facad structure scheme drawing of the utility model combination chain wheel disc.
Fig. 2 is the back view of Fig. 1.
Fig. 3 is the keystone configuration of the given bicycle shift chain gear apparatus of the utility model and the drive connection structural representation when being installed on the foot-operated axis.
As shown in Figure 1, 2, the said combination chain wheel disc of the utility model comprises the tray deck 2 that has slideway 3, is installed in the slide block 4 in the slideway, and the fan sprocket wheel 1 of sprocket in the periphery is housed on the face of this slide block; The slide block steady arm is housed on the another side, location ratchet 6 and elastic component that it comprises speed change toggle 7 and is subjected to speed change toggle control, also comprise can with the location ratchet bar 5 on the tray deck 2 of being fixed on of the good interlock of ratchet.
The tooth pitch of location ratchet bar is an important parameter, it is determining slide block and fan sprocket wheel at every turn along the displacement of slideway stepping, after guaranteeing that respectively fanning sprocket wheel all moves an equal displacement along slideway, still can keep good engagement, thereby chain-driving continues to carry out smoothly after making speed change with driving chain.
As shown in Figure 1, fan sprocket wheel 1 is fixed on the slide block and can moves along the slideway in the tray deck 23 with slide block.
As shown in Figure 2, location ratchet 6 and speed change toggle 7 are housed on the slide block 4, location ratchet bar 5 is parallel to slideway and is fixed on the tray deck 2, ratchet 6 is compressed spring pressure and is adjacent to ratchet bar 5 and keeps interlock with it, can force ratchet 6 to throw off ratchet bar 5 when toggle 7 is twisted by the shift fork effort, external force disappears and then sets back.
As shown in Figure 3, tray deck and retaining chain drum 11 are fixed on the axis 9; Gear shift fork 8 is installed on the vehicle frame, is subjected to gear change hand lever 12 tractions and control, can move forward and backward in the horizontal direction; Foot-operated handle 10 is between two slideways.
The utility model needs chain stretching device to be used.
Keep tray deck to rotate, adjust gear change hand lever 12, when gear shift fork when axis moves a displacement, the arc surface of the toggle 7 on its curved plectrum and the slide block contacts, and then promotes slide block and drives that the fan sprocket wheel is centrifugal to be moved, gear shift fork 8 is with after speed change toggle 7 separates, ratchet again with the ratchet bar interlock, slide block is finished the location, when tray deck changes a full week, each sequential slider finishes above-mentioned contact in turn, move and location action after, bicycle promptly realizes once increasing the speed change of speed ratio.When gear shift fork 8 when axis moves a displacement, then its direct dialing sheet at first contacts with the tip of toggle 7, it is reversed, stir ratchet 6 and throw off ratchet bars 5, then promote slide block and entad move, gear shift fork 8 is with after toggle 7 separates, ratchet is reorientated, when tray deck changes a full week, each sequential slider finishes above-mentioned contact in turn, move and location action after, bicycle promptly realizes once reducing the speed change of speed ratio.
Claims (3)
1, a kind of bicycle shift chain gear apparatus, it comprises combination chain wheel disc, retaining chain drum, gear shift fork, variable speed operation handle, of the present utility model being characterised in that:
A, described combination chain wheel disc comprise tray deck, fan sprocket wheel, slide block, slide block stepping steady arm;
B, be installed in the tray deck on the transmission shaft, this dish is provided with four or six slideways, and these slideways are radial rectangular distribution around the tray deck axle center;
C, a slide block is housed in each slideway, a slide block steady arm and fan sprocket wheel all are housed on each slide block;
D, be installed near the gear shift fork that has that is positioned on the car body tray deck,
E, with the retaining chain drum of tray deck secured in parallel, fan sprocket wheel and messenger chain folder limit thereof two coil between.
2, bicycle shift chain gear apparatus as claimed in claim 1, it is characterized in that said slide block steady arm comprise the location ratchet that is installed on the slide block, with the speed change toggle of location ratchet interlock and compress the elastic component of location ratchet and be installed on the tray deck can with the location ratchet bar of the good interlock of location ratchet.
3, bicycle shift chain gear apparatus as claimed in claim 1 is characterized in that tray deck is installed on the foot-operated axis, and its foot-operated handle is near the angular bisector position of angle of two adjacent slideway line of centerss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93201379 CN2151942Y (en) | 1993-01-10 | 1993-01-10 | Speed changing chain device for bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93201379 CN2151942Y (en) | 1993-01-10 | 1993-01-10 | Speed changing chain device for bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2151942Y true CN2151942Y (en) | 1994-01-05 |
Family
ID=33785873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93201379 Expired - Fee Related CN2151942Y (en) | 1993-01-10 | 1993-01-10 | Speed changing chain device for bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2151942Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104816781A (en) * | 2015-03-24 | 2015-08-05 | 李皓明 | Super variable-speed gear |
-
1993
- 1993-01-10 CN CN 93201379 patent/CN2151942Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104816781A (en) * | 2015-03-24 | 2015-08-05 | 李皓明 | Super variable-speed gear |
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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 |