CN204533401U - Stretcher - Google Patents
Stretcher Download PDFInfo
- Publication number
- CN204533401U CN204533401U CN201520235648.7U CN201520235648U CN204533401U CN 204533401 U CN204533401 U CN 204533401U CN 201520235648 U CN201520235648 U CN 201520235648U CN 204533401 U CN204533401 U CN 204533401U
- Authority
- CN
- China
- Prior art keywords
- damping
- damping sleeve
- pivoted arm
- spring
- 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 technical field of transmission, particularly relates to a kind of stretcher, comprises; Base (1); Pivoted arm (2); Idle wheel (3); Damping sleeve (4); Spring (5); Supporting frame (6), described damping sleeve (4) is provided with damping fin (7) with by the region a bit extending X radian to both sides near direction of pull in crossing 2 of the line of force, and described damping fin (7) is arranged on damping sleeve (4) outer wall.This stretcher using effect is better and working life is longer.
Description
Technical field
The utility model relates to technical field of transmission, particularly relates to a kind of stretcher.
Background technique
Stretcher is holding device conventional on belt, chain transmission system, be characterized in keeping belt, chain can have suitable tension force in transmission process, thus avoid belt slippage, or avoid Timing Belt to occur to jump tooth, take off tooth and haul out, or prevent chain-loose, come off, alleviate sprocket wheel, chain wear.
Stretcher comprises base, pivoted arm, damping sleeve, supporting frame, spring and Idle wheel, described damping sleeve, supporting frame and spring are arranged between base and pivoted arm, described Idle wheel is arranged on pivoted arm, contact friction is had between damping sleeve and pivoted arm, the damping sleeve of prior art is all thick, but because when stretcher is in running order, namely stretcher is when straining the belt or chain that are enclosed within Idle wheel, now spring can inside contract, supporting frame is driven inwardly to tighten up, and then drive damping sleeve inwardly to tighten up, frictional force between damping sleeve and pivoted arm is increased, and because now pivoted arm can be subject to belt or the chain pulling force towards a direction, so pivoted arm also can give damping sleeve power towards this direction simultaneously, namely only some stressed meeting is larger for damping sleeve, namely that a part of damping sleeve is often understood and pivoted arm friction, and then make damping sleeve only have those part wearing and tearing more serious, the damping force of such use is of a specified duration damping sleeve can reduce, affect the using effect of whole stretcher, and then the working life reducing damping sleeve is lower.
Summary of the invention
Technical problem to be solved in the utility model is: provide a kind of using effect better and the stretcher that working life is longer.
The technological scheme that the utility model adopts is: a kind of stretcher, comprises;
Base;
Pivoted arm, is rotatably connected on base;
Idle wheel, is rotatably connected on pivoted arm, and for sheathed belt or chain, described belt or chain are to Idle wheel pulling force;
Damping sleeve, circumference is spacing contact with pivoted arm on base, for providing the friction damping force stopping that pivoted arm rotates, on the center of circle of described damping sleeve through one by the line of force, the described line of force that is subject to is parallel with direction of pull;
Spring, between described base and pivoted arm, and described spring housing is located at outside damping sleeve, makes it extend out direction motion towards described spring for pivoted arm described in bias voltage;
Supporting frame, is set between damping sleeve and spring, because of spring direct squeezed air-damping cover, damping sleeve is damaged for preventing;
Described damping sleeve is provided with damping fin with by the region a bit extending X radian to both sides near direction of pull in crossing 2 of the line of force, and described damping fin is arranged on damping sleeve outer wall.
Adopt above structure compared with prior art, the utility model has the following advantages: damping sleeve with by crossing 2 of the line of force on the region a bit extending X radian to both sides of direction of pull, be provided with damping fin, like this when stretcher is in running order, the main force part of damping sleeve can be thicker than other positions, even if there are certain wearing and tearing like this, also less on the damping force impact of damping sleeve, even if the using effect of used time stretcher is better, and working life is higher.
As preferably, described X radian is 20-40 radian.Be arranged on like this and reach the application's order and namely make stretcher using effect good and the use basis of long service life being reduced as far as possible material, namely reduce cost.
As preferably, the elevation of water of described damping fin is identical with the elevation of water of supporting frame.Because when stretcher is in running order, spring can inside contract, and then drive supporting element to inside contract compression damping sleeve, so damping sleeve outer wall mainly contacts with supporting frame, so increase the damping fin of supporting frame height on damping sleeve outer wall, such supporting frame first can press damping fin, then damping fin removes squeezed air-damping cover again, make damping sleeve inwall and pivoted arm friction, even if damping sleeve inwall has wearing and tearing like this, because outer wall adds damping fin, so supporting frame still can make damping sleeve and pivoted arm friction by squeezed air-damping cover, and save material, reduce cost.
As preferably, described damping fin is identical with damping sleeve material and one-body molded.Such setting, produce more convenient, and cost is lower, and using effect is better.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model stretcher.
Fig. 2 is the exploded perspective view of the utility model stretcher.
Fig. 3 is the part-structure sectional view of the utility model stretcher.
Fig. 4 is the stressed schematic diagram of the utility model stretcher.
Fig. 5 is the enlarged view of Fig. 4 damping sleeve.
As shown in the figure: 1, base; 2, pivoted arm; 3, Idle wheel; 4, damping sleeve; 5, spring; 6, supporting frame; 7, damping fin.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further, but the utility model is not limited only to following embodiment.
As shown in the figure: a kind of stretcher, comprises;
Base 1;
Pivoted arm 2, is rotatably connected on base 1;
Idle wheel 3, is rotatably connected on pivoted arm 2, and for sheathed belt or chain, described belt or chain are to Idle wheel 3 one pulling force;
Damping sleeve 4, circumference is spacing to be contacted with pivoted arm 2 on base 1, for providing the friction damping force stopping that pivoted arm 2 rotates, on the center of circle of described damping sleeve 4 through one by the line of force, described parallel with direction of pull by the line of force;
Spring 5, between described base 1 and pivoted arm 2, and described spring 5 is set in outside damping sleeve 4, makes it extend out direction motion towards described spring 5 for pivoted arm described in bias voltage 2;
Supporting frame 6, is set between damping sleeve 4 and spring 5, because of spring 5 direct squeezed air-damping cover 4, damping sleeve 4 is damaged for preventing;
Described damping sleeve 4 is provided with damping fin 7 with by the region a bit extending X radian to both sides near direction of pull in crossing 2 of the line of force, and described damping fin 7 is arranged on damping sleeve 4 outer wall.Described damping fin 7 is between supporting frame 6 and damping sleeve 4.
Described X radian is 20-40 radian.And described X is most preferably 30 radians.
The elevation of water of described damping fin 7 is identical with the elevation of water of supporting frame 6.
Described damping fin 7 is identical and one-body molded with damping sleeve 4 material.
As shown in Figure 4, pulling force is F, be L by the line of force, pulling force is with stressed line parallel, pass damping sleeve 4 center of circle by the line of force and intersect at two some A with damping sleeve outer wall with B, near direction of pull is B point, and away from direction of pull is A point, damping fin is arranged on B point place, because B point is the central position of the main force part of damping sleeve 4 when stretcher is in running order.
Working principle of the present utility model is: when stretcher is in running order, pivoted arm 2 can drive spring 5 to inside contract, spring 5 can compress supporting frame 6, supporting frame 6 can compress damping fin 7, and then compress damping sleeve 4, damping sleeve 4 is made to compress pivoted arm 2, and because belt or chain can give Idle wheel 3 one pulling force, and Idle wheel 3 is arranged on pivoted arm 4, so Idle wheel 3 also can give pivoted arm 2 one power simultaneously, and because stretcher in working order time, pivoted arm 2 compresses with damping sleeve 4, so now damping sleeve 4 also can be subject to the pressure that a pivoted arm 2 provides, and this pressure direction is identical with pulling force, namely pivoted arm 2 can towards direction of pull by squeezed air-damping cover 4, and pivoted arm 2 also can rotate, and also have pivoting friction between damping sleeve 4, so the position wearing and tearing that damping sleeve 4 is under pressure can be more serious, the application increases a damping fin 7 on this damping sleeve 4 extruded position outer wall, even if so worn and torn in the position that damping sleeve 4 is under pressure, because thickness is thicker after part own has added damping fin 7, so be not very large on the damping friction power impact of damping sleeve 4.
Claims (4)
1. a stretcher, comprises;
Base (1);
Pivoted arm (2), is rotatably connected on base (1);
Idle wheel (3), is rotatably connected on pivoted arm (2), and for sheathed belt or chain, described belt or chain are to Idle wheel (3) pulling force;
Damping sleeve (4), circumference is spacing upper and contact with pivoted arm (2) at base (1), for providing the friction damping force stopping that pivoted arm (2) rotates, on the center of circle of described damping sleeve (4) through one by the line of force, the described line of force that is subject to is parallel with direction of pull;
Spring (5), is positioned between described base (1) and pivoted arm (2), and described spring (5) is set in damping sleeve (4) outward, makes it extend out direction motion towards described spring (5) for pivoted arm described in bias voltage (2);
Supporting frame (6), is set between damping sleeve (4) and spring (5), because of spring (5) direct squeezed air-damping cover (4), damping sleeve (4) is damaged for preventing;
It is characterized in that: described damping sleeve (4) is provided with damping fin (7) with by the region a bit extending X radian to both sides near direction of pull in crossing 2 of the line of force, and described damping fin (7) is arranged on damping sleeve (4) outer wall.
2. stretcher according to claim 1, is characterized in that: described X radian is 20-40 radian.
3. stretcher according to claim 1, is characterized in that: the elevation of water of described damping fin (7) is identical with the elevation of water of supporting frame (6).
4. stretcher according to claim 1, is characterized in that: described damping fin (7) is identical and one-body molded with damping sleeve (4) material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520235648.7U CN204533401U (en) | 2015-04-20 | 2015-04-20 | Stretcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520235648.7U CN204533401U (en) | 2015-04-20 | 2015-04-20 | Stretcher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204533401U true CN204533401U (en) | 2015-08-05 |
Family
ID=53747410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520235648.7U Expired - Fee Related CN204533401U (en) | 2015-04-20 | 2015-04-20 | Stretcher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204533401U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018196512A1 (en) * | 2017-04-25 | 2018-11-01 | 江苏爱尔特实业有限公司 | Friction type one-way timing tensioner providing high damping |
-
2015
- 2015-04-20 CN CN201520235648.7U patent/CN204533401U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018196512A1 (en) * | 2017-04-25 | 2018-11-01 | 江苏爱尔特实业有限公司 | Friction type one-way timing tensioner providing high damping |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20180420 |