CN2183328Y - Automatic stepless speed-changing chain guard of bicycle - Google Patents
Automatic stepless speed-changing chain guard of bicycle Download PDFInfo
- Publication number
- CN2183328Y CN2183328Y CN 94227172 CN94227172U CN2183328Y CN 2183328 Y CN2183328 Y CN 2183328Y CN 94227172 CN94227172 CN 94227172 CN 94227172 U CN94227172 U CN 94227172U CN 2183328 Y CN2183328 Y CN 2183328Y
- Authority
- CN
- China
- Prior art keywords
- slide block
- wheel
- chain
- drive wheel
- guide frame
- 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
Images
Landscapes
- Transmission Devices (AREA)
Abstract
The chain guard belongs to a drive device for bicycles, which is provided with a driving wheel and a chain wheel in parallel, wherein, the driving wheel is provided with a radial guide structure deviated from the driving wheel; the chain wheel is distributed with a linear type guide structure arranged along a radial direction of the chain wheel, and is provided with a slide block matched with the guide structure and an elastic element which applies elastic force to the slide block. The slide block is provided with a tooth body and a projection which is matched with the guide structure on the driving wheel; the linear type guide structure on the chain wheel specially adopts a slide bar, and the slide block is provided with a fastening structure which is matched with the slide bar. The chain teeth of a chain guard freely moves in the process of speed changing, and avoids the phenomenon of clamping teeth.
Description
The utility model relates to a kind of bicycle drive.
A kind of bicycle automatic stepless speed change chain drum is disclosed in application number is No. 93239049.8 Chinese utility application specification sheets, this speed-changing chain guard mainly is made of drive wheel that be arranged in parallel and sprocket wheel, sprocket wheel is provided with the slide block that can slide along guide groove, and is fixed with denticle on slide block.When riding to the size of the chain drum application of force, the last denticle that is positioned at slide block with slide block from trend core wheel or flange direction motion, thereby change the transmitting ratio of chain drum and car flywheel, the purpose of realization automatic stepless speed change.In above-mentioned chain drum, carry out because the motion of slide block is the guide frame along the chute form, its friction drag is bigger, and is easy in sliding process because of bearing the side force deflection of denticle transmission, " latch " phenomenon that appearance can not be slided influences the normal use of chain drum.Therefore, be necessary it is done further to improve.
The purpose of this utility model is that the slider guide structure of above-mentioned chain drum is improved, and the automatically speed-varying chain wheel of more flexible, the unlikely appearance of a kind of chain drum tooth activity " latch " phenomenon is provided.
Chain drum of the present utility model has drive wheel, sprocket wheel and crank.Drive wheel and sprocket wheel be arranged in parallel, and the drive wheel core wheel is captiveed joint with crank shaft.On the drive wheel relative one side side, be evenly distributed with and depart from drive wheel guide frame radially with sprocket wheel.Sprocket wheel is set on the crank shaft, is evenly distributed with the linear pattern guide frame that is provided with along the chain wheel radial on sprocket wheel, and is provided with slide block that matches with this guide frame and the elastic element that slide block is imposed elastic force.Elastic element points to chain wheel rim to the elastic force that slide block applies.Slide block is provided with the denticle that crown points to flange direction, the gap location of this denticle between drive wheel and sprocket wheel.Has with guide frame on the drive wheel projection that matches, can slide along this guide frame on the slide block.In the utility model, the linear pattern guide frame on the above-mentioned sprocket wheel adopts the guiding slide bar especially.For ease of slide block and guiding the cooperating of slide bar, slide block is provided with the fastening structure that matches with this guiding slide bar, and slide block is set on the slide bar by this fastening structure and also can slides along slide bar.Herein, described fastening structure can be and be arranged on the slide block, slide block is the slide bar trepanning of full obvolvent shape, also can be the button card that slide bar is part obvolvent shape and waits other similar structures.The setting of this fastening structure can guarantee that slide block moves along the guiding slide bar all the time.
Chain drum of the present utility model is compared with aforementioned existing chain drum, and the slip of slide block on sprocket wheel carried out along the guiding slide bar, and its friction drag is less, thereby makes the sprocket that is fixed on the slide block realize speed changing function freely to core wheel or flange direction motion.In addition, even bear bigger side force, the slide block that is set on the slide bar can deflection yet, and then has avoided " latch " phenomenon in the sliding process effectively, guarantees the normal use of chain drum.
Content of the present utility model is further described with the following Examples, but content of the present utility model is not limited only to content related among the embodiment.
Fig. 1 is the main diagrammatic sketch of chain drum among the embodiment.
Fig. 2 is the A-A cutaway view.
Fig. 3 is a back view.
Shown in Fig. 1～3, the sprocket wheel that the chain drum among the embodiment has drive wheel 1, crank 6 and mainly is made of interior ring 3, outer shroud 4 and guiding slide bar 5.Drive wheel and sprocket wheel be arranged in parallel.The drive wheel core wheel is captiveed joint with crank shaft 7.On drive wheel, be evenly distributed with six and depart from drive wheel arc chute 2 radially.The interior ring 3 of sprocket wheel is set on the crank shaft 7.Have six guiding slide bars 5 and be fixed between interior ring 3 and the outer shroud 4, each slide bar is along chain wheel radial rectangular distribution.On each slide bar, be respectively arranged with slide block 8.Offer the through hole 9 that matches with the slide bar 5 that leads on slide block 8, slide block is set on the slide bar by this through hole.Also be arranged with top spring 11 on slide bar, the elastic force that spring 11 pairs of slide blocks in top apply is pointed to chain wheel rim.Slide block is provided with the denticle 12 that crown points to wheel rim, the gap location of this denticle between drive wheel and sprocket wheel.In the present embodiment, denticle 12 is articulated on the slide block by the jointed shaft 10 that is arranged on the slide block.Simultaneously, drive wheel chute 2 is stretched in the end of jointed shaft 10, constitutes the projection of the embedding drive wheel chute of slide block.Also be equiped with the spacing top of denticle spring 13 between denticle and slide block, top spring 13 can impose rotating torque with respect to hinge 10 to denticle.During chain drum in using present embodiment, cycle chain is meshed with denticle 12 on the slide block.When crank drove drive wheel 1 rotation, the end that drive wheel chute 2 promptly passes through the jointed shaft 10 of formation slide block projection drove slide block 8 motions, and then makes sprocket rotation.In this process, if the component of propulsive effort on the chain wheel radial that drive wheel applies sprocket wheel by slide block is greater than the elastic top thrust of 11 pairs of slide blocks of top spring, then slide and to move to the core wheel direction along chute 2 and slide bar 5, cycle chain also enters the gap between drive wheel and the sprocket wheel thereupon, the engagement of denticle on maintenance and the slide block.If the component of above-mentioned propulsive effort is less than the elastic top thrust of 11 pairs of slide blocks of top spring, then slide block will move to flange direction under the effect of top spring 11.Like this,, can change the denticle that is arranged on the slide block and the distance between the sprocket wheel core wheel, promptly be equivalent to change the chain drum diameter, and then change the transmitting ratio of chain drum and car flywheel, realization automatic stepless speed change by the motion of above-mentioned slide block.For guaranteeing that the blockchain bar is in suitable tension and relaxation state all the time in the slide block movement process, can in this chain drum of installing, on bicycle, dispose existing chain auto-tensioning wheel.In the present embodiment, denticle 12 is movably hinged on slide block, and the purpose of the spacing top of relative set elasticity spring 13 is to allow denticle and blockchain bar keep engagement with preferred angle, further improve the strained condition of slide block, and slide block can be slided more swimmingly.What be worth particularly pointing out is that top spring 11 and top spring 13 all can be played the elastic element of same function by other, as replacements such as extension spring, disc spring, high-elastic rubber.In addition, all have only a crown on each denticle among the embodiment, where necessary, also a plurality of crowns can be set on each denticle.Arc chute 2 can replace by departing from drive wheel linear pattern chute radially.Simultaneously, also can adopt other guide frame form (as guide rail) to replace chute 2.When adopting other guide frame form to replace chute 2, also should change as the shape of the end of the jointed shaft 10 of projection on the slide block, to guarantee and the cooperating of guide frame thereupon.For example, when chute 2 changed guide rail form into, the end of jointed shaft 10 can correspondingly change the fork configuration that cooperates with it into.In addition, among the embodiment denticle 12 is movably hinged on the slide block, this version of enabling to rotate also can change into the denticle activity is embedded on the slide block, enables the version of sliding on the gliding movement targeting structure of setting up on the slide block.
Claims (3)
1, a kind of bicycle automatic stepless speed change chain drum, has drive wheel, sprocket wheel and crank, drive wheel and sprocket wheel be arranged in parallel, the drive wheel core wheel is captiveed joint with crank shaft, on the drive wheel relative one side side, be evenly distributed with and depart from drive wheel guide frame radially with sprocket wheel, sprocket wheel is set on the crank shaft, on sprocket wheel, be evenly distributed with the linear pattern guide frame that is provided with along the chain wheel radial, and be provided with slide block that matches with described guide frame and the elastic element that slide block is imposed elastic force, elastic element points to chain wheel rim to the elastic force that slide block applies, slide block is provided with the denticle that crown points to flange direction, the gap location of this denticle between drive wheel and sprocket wheel, have on the slide block with guide frame on the drive wheel and match, can be along the projection of this guide frame slip, it is characterized in that described guide frame is the guiding slide bar, slide block is provided with the fastening structure that matches with this guiding slide bar, and slide block is set on the slide bar by this fastening structure and can slides along slide bar.
2, chain drum as claimed in claim 1 is characterized in that the fastening structure that is provided with on the described slide block is the through hole that is opened on the slide block, and slide block is set on the slide bar by this through hole.
3, chain drum as claimed in claim 1 or 2 is characterized in that slide block is provided with jointed shaft, and described denticle is articulated on the slide block by this jointed shaft, is provided with elastic element between denticle and slide block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94227172 CN2183328Y (en) | 1994-02-04 | 1994-02-04 | Automatic stepless speed-changing chain guard of bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94227172 CN2183328Y (en) | 1994-02-04 | 1994-02-04 | Automatic stepless speed-changing chain guard of bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2183328Y true CN2183328Y (en) | 1994-11-23 |
Family
ID=33839969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94227172 Expired - Fee Related CN2183328Y (en) | 1994-02-04 | 1994-02-04 | Automatic stepless speed-changing chain guard of bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2183328Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105775028A (en) * | 2015-12-19 | 2016-07-20 | 深圳市山顶自行车科技有限公司 | Automatic continuously variable transmission |
| CN105882875A (en) * | 2014-10-21 | 2016-08-24 | 吴景全 | Stepless speed change method and stepless speed change structure of bicycles |
| CN113942787A (en) * | 2021-09-07 | 2022-01-18 | 杭州先罗输送机械有限公司 | Combined type sprocket overspeed device tensioner of variable diameter of lifting machine |
| CN114954772A (en) * | 2022-07-18 | 2022-08-30 | 深圳中华自行车(集团)股份有限公司 | Speed changer and bicycle with same |
-
1994
- 1994-02-04 CN CN 94227172 patent/CN2183328Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105882875A (en) * | 2014-10-21 | 2016-08-24 | 吴景全 | Stepless speed change method and stepless speed change structure of bicycles |
| CN105882875B (en) * | 2014-10-21 | 2019-08-09 | 南通北外滩建设工程有限公司 | A kind of the variable speed method and infinitely variable speed structure of bicycle |
| CN105775028A (en) * | 2015-12-19 | 2016-07-20 | 深圳市山顶自行车科技有限公司 | Automatic continuously variable transmission |
| CN113942787A (en) * | 2021-09-07 | 2022-01-18 | 杭州先罗输送机械有限公司 | Combined type sprocket overspeed device tensioner of variable diameter of lifting machine |
| CN113942787B (en) * | 2021-09-07 | 2023-02-10 | 杭州先罗输送机械有限公司 | Combined type sprocket overspeed device tensioner of variable diameter of lifting machine |
| CN114954772A (en) * | 2022-07-18 | 2022-08-30 | 深圳中华自行车(集团)股份有限公司 | Speed changer and bicycle with same |
| CN114954772B (en) * | 2022-07-18 | 2023-11-07 | 深圳中华自行车(集团)股份有限公司 | Transmission and bicycle with same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR890004250B1 (en) | Propulsion mechanism for lever propelled bicycles | |
| US6431573B1 (en) | Automatic transmission for a cycle, such as a bicycle, and a cycle having such as transmission | |
| CN208630792U (en) | Bicycle chain puller | |
| CN2183328Y (en) | Automatic stepless speed-changing chain guard of bicycle | |
| WO1996011133A2 (en) | Drive apparatus and method | |
| JPS60229885A (en) | Transmission mechanism | |
| US20050046269A1 (en) | Systems and methods for propelling a vehicle | |
| CN1027097C (en) | Self-positioning belt tensioner | |
| CN205972710U (en) | Hold -in range assembly line | |
| CN207682121U (en) | A kind of safety-type belt sander | |
| CN107512360B (en) | A kind of bicycle based on variable chain | |
| DE19633345C2 (en) | Bicycle with auxiliary drive | |
| CN215014098U (en) | Wear-resistant belt | |
| CN2168813Y (en) | Automatic stepless speed-changing bicycle drive | |
| KR200300279Y1 (en) | A bicycle propelled by upward and downward movement of saddle | |
| CN109083498A (en) | A kind of mobile guardrail for campus | |
| CN211918926U (en) | Mechanism is trampled to straight line with on-off pawl | |
| CN2113941U (en) | Bicycle drive | |
| CN102398665A (en) | Sleeve shaft-type rear speed changer | |
| CN1644449A (en) | Sliding crank transmitting mechanism of bicycle | |
| CN2129735Y (en) | Two chain two speed inner speed changer | |
| CN209660429U (en) | A kind of lifting of object loading table driving mechanism of food printer | |
| CN201012613Y (en) | Driving mechanism of handicraft model | |
| CN2175729Y (en) | Stepless speed changer for automatic adjusting bicycle | |
| CA2110125A1 (en) | Variable transmission |
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 |