CN207773366U - Chain stretching device and bicycle - Google Patents
Chain stretching device and bicycle Download PDFInfo
- Publication number
- CN207773366U CN207773366U CN201721779645.5U CN201721779645U CN207773366U CN 207773366 U CN207773366 U CN 207773366U CN 201721779645 U CN201721779645 U CN 201721779645U CN 207773366 U CN207773366 U CN 207773366U
- Authority
- CN
- China
- Prior art keywords
- axis
- crank
- axis pin
- backplate
- axis hole
- 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.)
- Active
Links
Landscapes
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
A kind of chain stretching device of the utility model offer and bicycle, chain stretching device includes fixed frame, crank, first axis pin, tensioning spring, second axis pin and tensioning wheel, the first axis hole is provided on fixed frame, the first end of crank is provided with the second axis hole, and the first end of crank has accommodating chamber, the second end of crank is provided with third axis hole, first axis pin is each passed through the first axis hole and the second axis hole, first axis pin is fixed on crank, and first axis pin be rotatably coupled with the first axis hole around the axis of the first axis hole, tensioning spring is mounted in accommodating chamber, and the both ends of tensioning spring respectively with crank, fixed frame connects, the second end of second axis pin and crank connects, and second axis pin pass through third axis hole, tensioning wheel is installed in rotation on around the axis of the second axis pin on the second axis pin.And it is provided with the bicycle of the chain stretching device.The chain stretching device and bicycle all have the advantage simple in structure, reliable, production cost is low and operating noise is small.
Description
Technical field
The utility model is related to technical field of bicycles, specifically, being to be related to a kind of chain tension dress of bicycle use
Set and be provided with the bicycle of the chain stretching device.
Background technology
The use of bicycle during, the distance between trailing wheel and axis of bicycle with ride, usage time
It accumulates and gradually becomes loose, for bicycle especially big to this kind of usage frequency of public bicycles, chain relaxation
Phenomenon becomes apparent.And bicycle chain once relaxes, and is just easily fallen in ride, and then be band of riding
It is greatly inconvenient to come.
To solve the above-mentioned problems, when carrying out structure design to bicycle, one can be arranged on the rear chain stay of bicycle
A lateral sliding slot so that when chain relaxes, adjusted by adjusting position of the rear axle of bicycle in sliding slot
The relative distance between rear axle and axis is saved, and then realizes the adjusting to chain tension, still, which is carrying out chain
When tensile force is adjusted, operation is very complicated, laborious, and needs periodically actively to go that rear axle position is adjusted, very
It is inconvenient.For this purpose, designer develops a kind of chain stretching device, which generally comprises one or two and matches with chain
Directive wheel of the gear of conjunction as chain, and setting carries out directive wheel the screw rod and spiral shell of position adjusting on chain stretching device
Mother, still, existing chain stretching device there are complicated, cumbersome for installation, production cost is high, noise is big, high failure rate and
Safeguard inconvenient disadvantage.
Invention content
To solve the above-mentioned problems, the main purpose of the utility model is to provide a kind of simple in structure, reliable, production cost
Low and small operating noise chain stretching device.
The another object of the utility model is to provide a kind of simple in structure, reliable, and production cost is low and operating noise is small
Bicycle.
In order to realize that the main purpose of the utility model, the utility model provide a kind of chain stretching device, wherein including
Fixed frame, crank, the first axis pin, tensioning spring, the second axis pin and tensioning wheel are provided with the first axis hole on fixed frame, crank
First end is provided with the second axis hole, and the first end of crank has an accommodating chamber, and the second end of crank is provided with third axis hole, and first
Axis pin is each passed through the first axis hole and the second axis hole, and the first axis pin is fixed on crank, and the first axis pin is around the axis of the first axis hole
Line is rotatably coupled with the first axis hole, and tensioning spring is mounted in accommodating chamber, and the both ends of tensioning spring respectively with crank, solid
Determine frame connection, the second end connection of the second axis pin and crank, and the second axis pin passes through third axis hole, tensioning wheel is around the second axis pin
Axis is installed in rotation on the second axis pin.
Therefore fixed frame, for being connect with the vehicle frame of bicycle, the first end of crank passes through the first axis pin and fixation
Frame is hinged so that crank can be relatively fixed frame and be swung, and then the chain of bicycle is adjusted by different swing angles
The pretightning force of item.And tensioning spring is set between crank and fixed frame so that tensioning spring can carry out the swing of crank
It resets, so that crank can provide enough pretightning forces for the chain of bicycle, and enables crank automatically according to chain
The relaxation degree of item adjusts the swing angle of itself, and then ensures that chain has enough pretightning forces.It is set in the second end of crank
The second axis pin to be set, and tensioning wheel is installed in rotation on the second axis pin so that chain can be held or be pushed down to tensioning wheel, and
The frictional force between chain stretching device and chain can be reduced.In addition, crank can be fixed on the first axis pin by riveting
Together, to reduce the mating surface of the first axis pin and fixed frame, to achieve the effect that reduce noise.As it can be seen that by the chain
The setting of tensioning apparatus and structure design so that the chain stretching device have it is simple in structure, reliable, production cost it is low and work
The small advantage of noise.
Further embodiment is that the first limited block is provided on fixed frame, and the first end of crank extends ground towards fixed frame
It is provided with the second limited block, the second limited block can turn to the first limited block around the axis of the first axis hole.
Therefore the first limited block is set on fixed frame and the second limited block is set on crank so that works as song
When handle is rotated by the first axis pin relative to fixed frame, the range of crank-swinging can be limited, so prevent by
Excessively tensioning wheel is caused to be detached from the connection with the chain of bicycle in crank-swinging, and then ensures the work of chain stretching device
Reliability.
Further scheme is that the number of teeth of tensioning wheel is 10 to 13.
Therefore the number of teeth of tensioning wheel is arranged between 10 to 13, can ensure the chain of bicycle and is opened
Cooperation between bearing up pulley keeps stablizing, and effectively reduces the noise of the shock and friction between chain and tensioning wheel.
Further scheme is that chain stretching device further includes backplate group, and backplate group includes the first backplate and the second shield
Plate, the first backplate and the second backplate are installed on the second axis pin, and the first backplate and the second backplate are located at tensioning wheel
Both sides.
Therefore the first backplate and the second backplate are set at the both ends of tensioning wheel so that the first backplate and the second backplate
Chain can be limited, and played a protective role to tensioning wheel.
Further scheme is, chain stretching device further includes bearing, bearing be connected to the second axis pin and tensioning wheel it
Between, and the both ends of bearing are abutted with the first backplate, the second backplate respectively.
Therefore setting bearing can reduce between the second axis pin and tensioning wheel between the second axis pin and tensioning wheel
Rotation friction improves the reliability of the work of chain stretching device so that the rotation of tensioning wheel is more smooth.
In order to realize that the another object of the utility model, the utility model provide a kind of bicycle, including vehicle frame and chain
Tensioning apparatus, wherein chain stretching device includes fixed frame, crank, the first axis pin, tensioning spring, the second axis pin and tensioning wheel,
Fixed frame is fixedly connected with vehicle frame, and the first axis hole is provided on fixed frame, and the first end of crank is provided with the second axis hole, and crank
First end there is accommodating chamber, the second end of crank is provided with third axis hole, and the first axis pin is each passed through the first axis hole and second
Axis hole, the first axis pin are fixed on crank, and the first axis pin is rotatably coupled around the axis of the first axis hole with the first axis hole,
Tight spring is mounted in accommodating chamber, and the both ends of tensioning spring are connect with crank, fixed frame respectively, and the of the second axis pin and crank
Two ends connect, and the second axis pin passes through third axis hole, tensioning wheel to be installed in rotation on the second axis pin around the axis of the second axis pin
On.
Therefore fixed frame, for being attached with vehicle frame, the first end of crank is cut with scissors by the first axis pin and fixed frame
It connects so that crank can be relatively fixed frame and be swung, and then by different swing angles come the pre- of the chain to bicycle
Clamp force is adjusted.And tensioning spring is set between crank and fixed frame so that tensioning spring can to the swing of crank into
Row resets, so that crank can provide enough pretightning forces for the chain of bicycle, so that crank being capable of automatic root
The swing angle that itself is adjusted according to the relaxation degree of chain, to ensure that chain has enough tensile forces.In the second end of crank
Second axis pin is set, and tensioning wheel is installed in rotation on the second axis pin so that chain can be held or be pushed down to tensioning wheel,
And the frictional force between chain stretching device and chain can be reduced.In addition, crank and the first axis pin can be fixed by riveting
Together, to reduce the mating surface of the first axis pin and fixed frame, to achieve the effect that reduce noise.As it can be seen that by chain
The setting of tensioning apparatus and structure design so that the chain stretching device has simple in structure, reliable, is produced into local and works
The small advantage of noise.
Further embodiment is that the first limited block is provided on fixed frame, and the first end of crank extends ground towards fixed frame
It is provided with the second limited block, the second limited block can turn to the first limited block around the axis of the first axis hole.
Therefore the first limited block is set on fixed frame and the second limited block is set on crank so that works as song
When handle is rotated by the first axis pin relative to fixed frame, the range of crank-swinging can be limited, so prevent by
Tensioning wheel is detached from the connection with the chain of bicycle caused by crank-swinging is excessive, and then ensures the work of chain stretching device
The reliability of work.
Further scheme is that the number of teeth of tensioning wheel is 10 to 13.
Therefore the number of teeth of tensioning wheel is arranged between 10 to 13, it can effectively ensure that the chain of bicycle
Cooperation between tensioning wheel keeps stablizing, and effectively reduces the noise of the shock and friction between chain and tensioning wheel.
Further scheme is that the outer diameter of tensioning wheel is less than or equal to the outer diameter of the sprocket wheel of the trailing wheel of bicycle.
Further scheme is that chain stretching device further includes backplate group, and backplate group includes the first backplate and the second shield
Plate, the first backplate and the second backplate are installed on the second axis pin, and the first backplate and the second backplate are located at tensioning wheel
Both sides.
Therefore the first backplate and the second backplate are set at the both ends of tensioning wheel so that the first backplate and the second backplate
Chain can be limited, and played a protective role to tensioning wheel.
Description of the drawings
Fig. 1 is the local structural graph of the utility model bicycle embodiment.
Fig. 2 is the structure chart of the chain stretching device of the utility model bicycle embodiment.
Fig. 3 is the sectional view of the chain stretching device of the utility model bicycle embodiment.
Fig. 4 is the exploded view of the chain stretching device of the utility model bicycle embodiment.
The utility model is described in further detail with reference to the accompanying drawings and embodiments.
Specific implementation mode
Referring to figs. 1 to 4, bicycle includes vehicle frame 100 and chain stretching device 10, wherein chain stretching device 10 includes
Fixed frame 1, crank 2, the first axis pin 3, tensioning spring 4, the second axis pin 5, tensioning wheel 6, backplate group 7 and bearing 8.
Fixed frame 1 is fixedly connected with vehicle frame 100, specifically, on vehicle frame is provided with link block 101, the first end of fixed frame 1
It is provided with limiting section 11, limiting section 11 is fastened on link block 101, and is carried out by bolt between fixed frame 1 and link block 101
Connection.In addition, the second end of fixed frame 1 is provided with the first axis hole 12, and is additionally provided with the first limited block 13 on fixed frame 1, the
One limited block 13 is between the first axis hole 12 and limiting section 11.
The first end of crank 2 is provided with the second axis hole 21, and the first end of crank 2 has an accommodating chamber 22, and the second of crank 2
End is provided with third axis hole 23.First axis pin 3 is each passed through the of 2 first end of the first axis hole 12 and crank of the first fixed frame 1
Two axis holes 21, the first axis pin 3 are fixed on crank 2, and the first axis pin 3 can turn around the axis of the first axis hole 12 with the first axis hole 12
It connects dynamicly so that crank 2 can be relatively fixed frame 2 and be swung, and then by different swing angles come to bicycle
The pretightning force of chain is adjusted.
In addition, the first end of crank 2 is provided with the second limited block 24 with extending towards fixed frame 2, the second limited block 24 can
On the first limited block 13 for turning to fixed frame 1 of the first axis pin 3.As it can be seen that be arranged on fixed frame 2 first limited block 13 with
And the second limited block 24 is set on crank 2 so that when crank 2 is rotated by the first axis pin 3 relative to fixed frame 2,
First limited block 13 and the second limited block 24 can limit the hunting range of crank 2, and then prevent crank 2 due to swinging
Excessively cause tensioning wheel 6 to be detached from the connection with bicycle chain, and then ensures the reliability of the work of chain stretching device 10.
Tensioning spring 4 be mounted on crank 2 first end accommodating chamber 22 in, and the both ends of tensioning spring 4 respectively with fixation
Frame 1, crank 2 connect.By the way that tensioning spring 4 is arranged between fixed frame 1 and crank 2 so that tensioning spring 4 can be to crank 2
Swing resetted so that crank 2 can provide enough pretightning forces for bicycle chain, so that 2 energy of crank
It is enough that the swing angle of itself is adjusted automatically according to the relaxation degree of chain, to ensure that chain has enough tensile forces.
Second axis pin 5 is connect with the second end of crank 2, and the second axis pin 5 passes through the third axis hole of the second end of crank 2
23.Tensioning wheel 6 is rotatably mounted around the axis of the second axis pin 5 on the second axis pin 5.As it can be seen that in the second end setting the of crank 2
Two axis pins 5, and tensioning wheel 6 is installed in rotation on the second axis pin 5 so that chain can be held or be pushed down to tensioning wheel, and
The frictional force between chain stretching device 10 and chain can be reduced.In addition, crank 2 and the first axis pin 3 can be solid by riveting
It is scheduled on together, to reduce the mating surface of the first axis pin 3 and fixed frame 3, to achieve the effect that reduce noise.Preferably, it is tensioned
The number of teeth of wheel 6 is 10 to 13, by the setting of the number of teeth to tensioning wheel 6, can effectively ensure that the chain of bicycle with
Cooperation between tensioning wheel 6 keeps stablizing, and effectively reduces the noise of the shock and friction between chain and tensioning wheel 6.Furthermore
The outer diameter of bearing up pulley 6 or equal to bicycle trailing wheel sprocket wheel outer diameter.
Backplate group 7 includes the first backplate 71 and the second backplate 72, and the first backplate 71 and the second backplate 72 are installed in second
On axis pin 5, and the first backplate 71 and the second backplate 72 are located at the both sides of tensioning wheel 6.By being arranged at the both ends of tensioning wheel 6
First backplate 71 and the second backplate 72 so that the first backplate 71 and the second backplate 72 can limit chain, and to tensioning
Wheel 6 plays a protective role.
Bearing 8 is connected between the second axis pin 5 and tensioning wheel 6, and the both ends of bearing 8 respectively with the first backplate 71, second
Backplate 72 abuts.By the way that bearing 8 is arranged between the second axis pin 5 and tensioning wheel 6, the second axis pin 5 and tensioning can be effectively reduced
Rotation friction between wheel 6 improves the work of chain stretching device so that the rotation of tensioning wheel 6 is more smooth
Reliability.
By said program as it can be seen that chain stretching device provided by the utility model and bicycle all have it is simple in structure, can
It leans on, the advantage that production cost is low and operating noise is small.
Finally it is emphasized that the above is only the preferred embodiment of the present invention, it is not limited to this reality
With novel, for those skilled in the art, the utility model can have various change and change, all in the utility model
Spirit and principle within, any modification, equivalent substitution, improvement and etc. done should be included in the protection model of the utility model
Within enclosing.
Claims (10)
1. chain stretching device, which is characterized in that including：
Fixed frame is provided with the first axis hole on the fixed frame；
The first end of crank, the crank is provided with the second axis hole, and the first end of the crank has accommodating chamber, the crank
Second end be provided with third axis hole；
First axis pin, first axis pin are each passed through first axis hole and second axis hole, and first axis pin is fixed
On the crank, and first axis pin is rotatably coupled around the axis of first axis hole with first axis hole；
Tensioning spring, the tensioning spring be mounted on the accommodating chamber in, and the both ends of the tensioning spring respectively with the song
Handle, fixed frame connection；
Second axis pin, second axis pin are connect with the second end of the crank, and second axis pin passes through the third axis
Hole；
Tensioning wheel, the tensioning wheel are installed in rotation on around the axis of second axis pin on second axis pin.
2. chain stretching device according to claim 1, it is characterised in that：
The first limited block is provided on the fixed frame, the first end of the crank is provided with towards the fixed frame with extending
Two limited blocks, second limited block can turn to first limited block around the axis of first axis hole.
3. chain stretching device according to claim 2, it is characterised in that：
The number of teeth of the tensioning wheel is 10 to 13.
4. chain stretching device according to any one of claims 1 to 3, it is characterised in that：
The chain stretching device further includes backplate group, and the backplate group includes the first backplate and the second backplate, first shield
Plate and second backplate are installed on second axis pin, and first backplate and second backplate are located at institute
State the both sides of tensioning wheel.
5. chain stretching device according to claim 4, it is characterised in that：
The chain stretching device further includes bearing, and the bearing is connected between second axis pin and the tensioning wheel, and
The both ends of the bearing are abutted with first backplate, second backplate respectively.
6. bicycle, including vehicle frame and chain stretching device, it is characterised in that：
The chain stretching device includes：
Fixed frame, the fixed frame are fixedly connected with the vehicle frame, and the first axis hole is provided on the fixed frame；
The first end of crank, the crank is provided with the second axis hole, and the first end of the crank has accommodating chamber, the crank
Second end be provided with third axis hole；
First axis pin, first axis pin are each passed through first axis hole and second axis hole, and first axis pin is fixed
On the crank, and first axis pin is rotatably coupled around the axis of first axis hole with first axis hole；
Tensioning spring, the tensioning spring be mounted on the accommodating chamber in, and the both ends of the tensioning spring respectively with the song
Handle, fixed frame connection；
Second axis pin, second axis pin are connect with the second end of the crank, and second axis pin passes through the third axis
Hole；
Tensioning wheel, the tensioning wheel are installed in rotation on around the axis of second axis pin on second axis pin.
7. bicycle according to claim 6, it is characterised in that：
The first limited block is provided on the fixed frame, the first end of the crank is provided with towards the fixed frame with extending
Two limited blocks, second limited block can turn to first limited block around the axis of first axis hole.
8. bicycle according to claim 7, it is characterised in that：
The number of teeth of the tensioning wheel is 10 to 13.
9. bicycle according to claim 7, it is characterised in that：
The outer diameter of the tensioning wheel is less than or equal to the outer diameter of the sprocket wheel of the trailing wheel of the bicycle.
10. according to claim 6 to 9 any one of them bicycle, it is characterised in that：
The chain stretching device further includes backplate group, and the backplate group includes the first backplate and the second backplate, first shield
Plate and second backplate are installed on second axis pin, and first backplate and second backplate are located at institute
State the both sides of tensioning wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721779645.5U CN207773366U (en) | 2017-12-15 | 2017-12-15 | Chain stretching device and bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721779645.5U CN207773366U (en) | 2017-12-15 | 2017-12-15 | Chain stretching device and bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207773366U true CN207773366U (en) | 2018-08-28 |
Family
ID=63226631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721779645.5U Active CN207773366U (en) | 2017-12-15 | 2017-12-15 | Chain stretching device and bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207773366U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109436179A (en) * | 2018-12-05 | 2019-03-08 | 珠海迪瑞乐科技有限公司 | Bicycle dials chain structure and bicycle |
-
2017
- 2017-12-15 CN CN201721779645.5U patent/CN207773366U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109436179A (en) * | 2018-12-05 | 2019-03-08 | 珠海迪瑞乐科技有限公司 | Bicycle dials chain structure and bicycle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH06500970A (en) | Bicycle power transmission device | |
| CN101570231B (en) | Bicycle rear derailleur | |
| US20130053223A1 (en) | Training apparatus for a bicycle | |
| CN207773366U (en) | Chain stretching device and bicycle | |
| CN1915738A (en) | Bicycle rear derailleur | |
| CN104260821B (en) | A kind of bicycle derailleur | |
| CN1240182A (en) | Brake device for bicycle | |
| CN207523879U (en) | Bicycle chain puller mounting structure and bicycle | |
| CN205623336U (en) | A fixing device for grafting | |
| CN104406135B (en) | A kind of road lamp cap mounting structure with pitch regulation function | |
| CN106982706A (en) | A kind of fixing device of Chinese garden planting thing | |
| CN207523880U (en) | Bicycle chain stretcher | |
| CN204031847U (en) | The grain lifter of miniature harvester | |
| CN209327802U (en) | A kind of wrist-watch rear shell with anti-deformation function | |
| CN205385248U (en) | Wire fixing -line device | |
| CN108332607A (en) | A kind of modified weapon | |
| CN203675663U (en) | Transmission system of harvester | |
| CN208650240U (en) | A kind of portable rainwater Hanging Basket mounting structure | |
| CN208307007U (en) | A kind of structure for pod for unmanned plane | |
| CN205061024U (en) | Bright leaf lifting conveying device | |
| CN208175583U (en) | A kind of fixed bracket of trees | |
| CN205663843U (en) | Two -way tensioning ware | |
| CN208907408U (en) | Pitching regulating device and stand fan | |
| CN209086846U (en) | A kind of computer cabinet mounting structure | |
| CN208007199U (en) | A kind of motorcycle rear fork |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 519000 building B-2, No. 8, Honghui fifth road, Shuanglin District, LIANGANG Industrial Zone, Jinwan District, Zhuhai City, Guangdong Province Patentee after: Zhuhai Blueprint Sports Technology Co.,Ltd. Address before: 519090 room 312-43, third floor, aviation new town planning exhibition hall, Jinwan District, Zhuhai City, Guangdong Province Patentee before: ZHUHAI LTWOO CONTROLLER TECHNOLOGY CO.,LTD. |
|
| CP03 | Change of name, title or address |