CN201493802U - Constant force tensioner - Google Patents
Constant force tensioner Download PDFInfo
- Publication number
- CN201493802U CN201493802U CN2009202340657U CN200920234065U CN201493802U CN 201493802 U CN201493802 U CN 201493802U CN 2009202340657 U CN2009202340657 U CN 2009202340657U CN 200920234065 U CN200920234065 U CN 200920234065U CN 201493802 U CN201493802 U CN 201493802U
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- CN
- China
- Prior art keywords
- oscillating bar
- slick
- support
- spring
- constant force
- 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 a constant force tensioner, which is characterized in that one end of a support is connected with a left oscillating bar, the other end of the support is connected with one end of a right oscillating bar, the other end of the left oscillating bar is connected with a circular smooth arc block, the other end of the right oscillating bar is connected with the circular smooth arc block; the support, the left oscillating bar, the circular smooth arc block and the right oscillating bar form a parallelogram mechanism; the support is provided with a fixed cam provided with a cam slot; a roller is arranged inside the cam slot; one end of a spring is connected with the roller; and the other end of the spring is connected with the joint of the right oscillating bar and the circular smooth arc block. The constant force tensioner has simple, compact and reasonable structure; can improve working quality, increase working speed, reducing noise and prolonging service life of a driving system when applied to driving which utilizes flexible bodies such as belt, chain and the like; and is more convenient and reliable to use and more effective.
Description
Technical field
The utility model relates to a kind of constant force stretcher, and the assembly of specifically a kind of parallel-crank mechanism and cam and spring by the deflection of cam effect control spring, thereby obtains being output as a device of constant force.
Background technology
At present, in the tensioner apparatus of beformable body transmissions such as band, chain in the past, the device of pure spring and fixing tensioner apparatus are arranged.Though the device of pure spring can reach the function of auto-tensioning, the power that acts on the beformable body changes.Along with the prolongation beformable body deflection of working time increases and the deflection of spring reduces on the contrary, make to act on that pulling force on the beformable body diminishes and the function that reduces tensioning.Though fixing tensioner apparatus can not change the size of tensile force, need often manually adjust, in use inconvenient.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned weak point, thereby a kind of work quality, operating rate that can improve in the transmission system is provided; Easy to use, can reduce noise, and the constant force stretcher that can increase the service life.
The technical scheme that provides according to the utility model, a kind of constant force stretcher, feature is: support one end is connected with left fork, the other end is connected with right fork one end, the left side fork other end is connected with slick and sly arc piece, the right fork other end is connected with slick and sly arc piece, constitute parallel-crank mechanism jointly by support, left fork, slick and sly arc piece, right fork, described support is provided with stationary cam, stationary cam is provided with cam path, be provided with roller in cam path, spring one end is connected with roller, and the spring other end connects with the junction that right fork is connected with slick and sly arc piece.
Compared with the prior art the utility model has the following advantages:
The utility model is simple, compact and reasonable for structure; This stretcher that uses in beformable body transmissions such as band, chain can improve the dry sound of work quality, operating rate, reduction of transmission system and increases the service life; Use more convenient, reliable, the tensioner apparatus of better effects if.
Description of drawings
Fig. 1 is the utility model structure user mode schematic diagram.
The specific embodiment
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
As shown in Figure 1: comprise support 1, roller 2, left fork 3, spring 4, outside beformable body (beformable bodys such as band or chain) 5, slick and sly arc piece 6, right fork 7 etc.
The utility model support 1 one ends are connected with left fork 3, the other end is connected with right fork 7 one ends, left side fork 3 other ends are connected with slick and sly arc piece 6, right fork 7 other ends are connected with slick and sly arc piece 6, constitute parallel-crank mechanism jointly by support 1, left fork 3, slick and sly arc piece 6, right fork 7, four of parallel-crank mechanism to angle point for not being first couple of angle point A, second couple of angle point B, the 3rd couple of angle point C and the 4th couple of angle point D; Described support 1 is provided with stationary cam, and stationary cam is provided with cam path, is provided with roller 2 in cam path, and spring 4 one ends are connected with roller 2, and spring 4 other ends connect with the junction that right fork 7 is connected with slick and sly arc piece 6.
Support 1 is fixed on the static relatively frame, and when outside beformable body 5 beformable bodys such as (band or) chains when acting on the slick and sly arc piece 6 that is provided with slick and sly arc, the state of mechanism changes, and variation has taken place Φ, from 40 ° of " " 80 ° of Φ.At this moment the distortion (being the active force of control spring) by the cam path control spring 4 on first member 1 makes to act on external force F on the slick and sly arc piece 6
1, F
2(slick and sly arc tangential direction) equal and opposite in direction and be a device of a constant force.Mechanism all can be in poised state under the situation that is almost a constant force, thereby realizes along slick and sly arc tangent line pulling force output.
Claims (2)
1. constant force stretcher, it is characterized in that: comprise support (1), left fork (3), spring (4), slick and sly arc piece (6), right fork (7), described support (1) one end is connected with left fork (3), the other end is connected with right fork (7) one ends, left side fork (3) other end is connected with slick and sly arc piece (6), right fork (7) other end is connected with slick and sly arc piece (6), constitutes parallel-crank mechanism by support (1), left fork (3), slick and sly arc piece (6), right fork (7); Described support (1) is provided with stationary cam, and stationary cam is provided with cam path, is provided with roller (2) in cam path, and spring (4) one ends are connected with roller (2), and spring (4) other end connects with the junction that right fork (7) is connected with slick and sly arc piece (6).
2. constant force stretcher according to claim 1 is characterized in that described slick and sly arc piece (6) is provided with slick and sly arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202340657U CN201493802U (en) | 2009-08-05 | 2009-08-05 | Constant force tensioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202340657U CN201493802U (en) | 2009-08-05 | 2009-08-05 | Constant force tensioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201493802U true CN201493802U (en) | 2010-06-02 |
Family
ID=42437011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202340657U Expired - Fee Related CN201493802U (en) | 2009-08-05 | 2009-08-05 | Constant force tensioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201493802U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257654A (en) * | 2012-02-17 | 2013-08-21 | 海德堡印刷机械股份公司 | Device used for system utilizing solar energy |
| CN104444126A (en) * | 2014-12-22 | 2015-03-25 | 重庆元创汽车整线集成有限公司 | Conveying belt tensioning adjusting device |
-
2009
- 2009-08-05 CN CN2009202340657U patent/CN201493802U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257654A (en) * | 2012-02-17 | 2013-08-21 | 海德堡印刷机械股份公司 | Device used for system utilizing solar energy |
| CN104444126A (en) * | 2014-12-22 | 2015-03-25 | 重庆元创汽车整线集成有限公司 | Conveying belt tensioning adjusting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 Termination date: 20100805 |