CN206545660U - A kind of new negative characteristic pulling force scrollwork extension spring - Google Patents
A kind of new negative characteristic pulling force scrollwork extension spring Download PDFInfo
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- CN206545660U CN206545660U CN201621419357.4U CN201621419357U CN206545660U CN 206545660 U CN206545660 U CN 206545660U CN 201621419357 U CN201621419357 U CN 201621419357U CN 206545660 U CN206545660 U CN 206545660U
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- pulling force
- elastic piece
- extension spring
- metallic elastic
- negative characteristic
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Abstract
The utility model relates to a kind of new negative characteristic pulling force scrollwork extension spring, including an elongated metal flexure strip with equal in width winds the multi-turn to be formed and is mutually adjacent between often enclosing, profile extends one section of a stretching end for hollow cylindric scroll portion and by the scroll portion outermost metal flexure strip；It is characterized in that, when the metallic elastic piece stretching is evened up, metallic elastic piece gradually successively decreases from stretching end to inner metallic elastic piece perpendicular to the effective area of the cross sectional area of draw direction, i.e., metallic elastic piece thickness gradually successively decreases so that its elastic pulling force also accordingly successively decreases therewith.The utility model will greatly reduced force transformation mechanism, organization volume is substantially reduced, and agency cost drastically declines, and material consumption is significantly reduced, cost is substantially reduced and environmental, and is then particularly had to some in the product much limited with unusual significance.
Description
Technical field
The utility model relates to a kind of extension spring, and in particular to be a kind of new negative characteristic pulling force scrollwork extension spring.
Background technology
It is a kind of current special extension spring, also known as volute spring that fixed force spring, which is also known as constant force spring, and it is by another
Plane scroll spring as species also known as clockwork spring（The difference of itself and volute spring is that its scroll portion is not pasted mutually per coil spring
Tightly）Change and come, constant force volute spring includes an elongate thin metallic elastic piece etc. with outward appearance width and winds to be formed many
Circle and often enclose between be mutually adjacent to, the scroll portion of profile generally hollow cylindrical and by scroll portion outermost metal piece extend one
One stretching end of section, is mainly used in all kinds of bascule such as lifting balance devices, carbon brush for electric machine spring etc. for requiring constant force output.
Its feature is that the spring tension of output is more constant, and tension variations are minimum.All it is directly to draw constant force spring when actual use
Stretch out and make straight-line displacement campaign, and fixed force spring is exported constant thrust.
It is well known that for a long time, it is single under conditions of any external mechanism is not added just as the earth is circle
The bigger elastic force that it is produced of only any camber of spring is about big, and root is deeply solid among the consciousness of people already.Specific such as one
Plant for spiral stretching spring, the length of elongation is bigger, and the pulling force being subject to is bigger, has formed intimate axiom, has even been known as perseverance
The fixed force spring of power（One kind of volute spring）Due to the limitation of its actual configuration, in real practical application, spring elongation is longer
Its pulling force, actually also can be longer and pulling force is constantly slightly increased with extending nor constant force completely is constant, simply smaller
, so-called constant force is also an approximate saying.With continuing to develop for electronics technology, to extension spring in existing electronic product
Deformation and power concerns mandate be also it is various, as in common lift display bracket at present just use mostly
Constant force tension spring as lifting balance device power source, but with the development of structure, more and more products need that extension spring draws more
Long pulling tension requirements are smaller, therefore, people have to realize this requirement indirectly by various complicated mechanical mechanisms, such as draw
Spring pulls device when switching to horizontal direction or oblique horizontal direction by vertical direction, i.e., device is subject to vertically downward due to gravity
Power offset or a part offset when, now device need tension spring tension can be reduced；Often also also have using another in reality
Set reverse extension spring mechanism to offset positive tension spring tension, a set of switching mechanism is needed in turn to be adapted to existing various balances
In the device that device and the output of various requirement pulling force are gradually decreased, etc., it is numerous, but these certainly will make mechanism complicated,
Increase cost, and inconvenience be installed, particularly increase many significant deficiencies of small product size or increase packaging volume, etc., it is clear that
It is likely to just use at all on the product for have certain limitations condition, such as has equipment of strict demand etc. to volume compact
It is exactly one.
Also therefore, exist if such a pulling force elongates diminishing extension spring with extension spring, then can bring almost
Subversive change, will greatly reduced force transformation mechanism, organization volume is substantially reduced, and agency cost drastically declines, material
Consumption is significantly reduced, and cost is substantially reduced and environmental, and then particularly has to some in the product much limited and have
Unusual significance.
Utility model content
In view of the shortcomings of the prior art, the utility model purpose be to provide a kind of spring its stretch it is longer but
Pulling force smaller negative characteristic pulling force vortex extension spring, changes elastic force, and Stability Analysis of Structures, no by changing metallic elastic piece thickness
Yielding, processing is simple, with low cost.
To achieve these goals, the utility model is to realize by the following technical solutions：
A kind of negative characteristic pulling force vortex extension spring, including an elongated metal flexure strip with equal in width wind the multi-turn to be formed
And be mutually adjacent between often enclosing, profile extends for hollow cylindric scroll portion and by the scroll portion outermost metal flexure strip
One section of a stretching end；When the metallic elastic piece stretching is evened up, the metallic elastic piece is from stretching end to the inner metal
Flexure strip gradually successively decreases perpendicular to the effective area of the cross sectional area of draw direction, i.e. metallic elastic piece thickness edge stretching end
Successively decrease on to interior extreme direction, elastic pulling force also accordingly successively decreases therewith.
Further, stretching end is provided with the metallic elastic piece to inner width gradually incremental elongated hole.
Further, the long side in the both sides of the elongated hole is with the symmetrical curve of the axis of symmetry of elongated metal spring leaf.
Further, the curve is curved line.
Further, the curve is straight line.
The metallic elastic piece is that at least two panels sheet metal is close to composite integrated and winds the scroll portion to be formed.
Further, the stretching end of metallic spring is provided with pulling eye or pull hook.Each turning of the elongated hole is set
Fillet is set to, to reduce stress concentration, extension resilient blade life-span.
The metallic elastic piece is elastic steel sheet.
Though the outward appearance width of the sheet metal is constant, due to the change of the elongated hole width in the sheet metal, from
And change the size of pulling force, reach and more elongate the smaller situation of pulling force.
According to above-mentioned characteristic pulling force scrollwork extension spring, wherein, the resilient blade is elastic steel sheet.
The elongated hole uses pinnacle trapezoidal hole, and the top width of the pinnacle trapezoidal hole is less than pinnacle trapezoidal hole
Bottom width, the top of the pinnacle trapezoidal hole is close to the outer end of the metallic elastic piece, and the bottom of the pinnacle trapezoidal hole is wide
Width of the degree less than metallic elastic piece.
The utility model is gradually successively decreased by setting spring foil metal from end to inner cross-sectional area is stretched, i.e. metal elastic
The thickness of piece gradually successively decreases, and reaches and more elongates the smaller situation of pulling force, complies with the output of various requirement pulling force and gradually subtracts
In few device, reduce the use of spring negative function power, will greatly reduced force transformation mechanism, organization volume contracts significantly
Small, agency cost drastically declines, and material consumption is significantly reduced, and cost is substantially reduced and environmental, and then particularly to having
A little to have with unusual significance in the product much limited, its Stability Analysis of Structures is unlikely to deform, and processing is simple, can be wide
It is general to be exported applied to various bascules and various requirement pulling force in the device gradually decreased, or have special want applied to various
In the bascule that the requirement pulling force output asked is gradually decreased.
Brief description of the drawings
Describe the utility model in detail with reference to the accompanying drawings and detailed description；
Fig. 1 is structural representation of the present utility model；
Structural representation when Fig. 2 evens up for the utility model.
Embodiment
To be easy to understand technological means, creation characteristic, reached purpose and effect of the utility model realization, below
With reference to embodiment, the utility model is expanded on further.
Referring to Fig. 1 and Fig. 2, a kind of negative characteristic pulling force vortex extension spring of the present embodiment, including one the outward appearance width such as have
Elongated metal flexure strip winds the multi-turn to be formed and is mutually adjacent between often enclosing, profile is for hollow cylindric scroll portion and by institute
State the stretching end that scroll portion outermost metal flexure strip extends one section；When the metallic elastic piece stretching is evened up, the metal
Flexure strip is gradually passed from stretching end to inner metallic elastic piece perpendicular to the effective area of the cross sectional area of draw direction
Subtract, i.e., described metallic elastic piece is provided with the metallic elastic in tension variations region, tension variations region from stretching end to the inner
Piece thickness gradually successively decreases, and elastic pulling force also accordingly successively decreases therewith, bigger and produce for offsetting metallic elastic piece more inboard end pulling force
Raw power.
In addition in the present embodiment, stretching end is may also set up in the metallic elastic piece gradually incremental to inner width
Elongated hole, the long side in both sides of the elongated hole is that, with the symmetrical curve of the axis of symmetry of elongated metal spring leaf, curve is arc
Line or straight line, fillet is set at each turning of elongated hole, to reduce stress concentration, extension resilient blade life-span.
In addition, the metallic elastic piece is elastic steel sheet, the metallic elastic piece is that at least two panels sheet metal is close to be combined
The scroll portion that one winding is formed, sheet metal uses elastic steel sheet.The stretching end of metallic spring is provided with drawing
Hole or pull hook.Though the outward appearance width of the sheet metal is constant, due to the change of the elongated hole width in the sheet metal, from
And change the size of pulling force, reach and more elongate the smaller situation of pulling force.
The utility model is reached by setting spring foil metal gradually to successively decrease from stretching end to inner effective width
The smaller situation of pulling force is more elongated, complies with the device that the output of various requirement pulling force is gradually decreased, reduces spring counteracting
The use of active force, will greatly reduced force transformation mechanism, organization volume is substantially reduced, and agency cost drastically declines, and material disappears
Consumption is significantly reduced, and cost is substantially reduced and environmental, and is then particularly had to some in the product much limited with non-
With ordinary significance, its Stability Analysis of Structures is unlikely to deform, and processing is simple, can be widely applied to various bascules and each
Plant and require that pulling force is exported in the device gradually decreased.
Further, the long side in both sides of the elongated elongated hole 11 on the metallic spring is with elongated metal spring leaf
The symmetrical curve of the axis of symmetry, the curve is that curved line can also be straight line.
In addition, in the present embodiment, the metallic elastic piece of volute spring is at least two panels and is close to composite integrated winding shape
Into scroll portion.The stretching end 21 of metallic spring 10 is provided with pulling eye or pull hook.
According to above-mentioned characteristic pulling force scrollwork extension spring, wherein, each turning of the elongated elongated hole 11 is set to fillet, to subtract
Few stress concentration, extension resilient blade life-span.In the present embodiment, the resilient blade is elastic steel sheet.
But, gone to draw two different springs with an equal amount of power, the length of elongation is different, this explanation spring has " soft "
Point of " hard ", the spring being easily stretched is softer, otherwise the soft or hard stiffness coefficient with it of harder springs represents that is firm
Property coefficient is bigger, and spring is harder.
In addition, in the case of to realize that the more drawing pulling force of extension spring is smaller, it would however also be possible to employ, spring foil metal is by stretching end extremely
The mode of inner thickness-tapered is realized.
The elongated hole uses pinnacle trapezoidal hole, and the top width of the pinnacle trapezoidal hole is less than pinnacle trapezoidal hole
Bottom width, the top of the pinnacle trapezoidal hole is close to the outer end of the metallic elastic piece, and the bottom of the pinnacle trapezoidal hole is wide
Width of the degree less than metallic elastic piece.
The utility model is gradually successively decreased by setting spring foil metal from end to inner cross-sectional area is stretched, i.e. metal elastic
The thickness of piece gradually successively decreases, and reaches and more elongates the smaller situation of pulling force, complies with the output of various requirement pulling force and gradually subtracts
In few device, the use of spring negative function power is reduced, the use scope of spring is greatly expanded, its Stability Analysis of Structures, no
Yielding, processing is simple, can be widely applied in the device that various bascules and the output of various requirement pulling force are gradually decreased.
The utility model will greatly reduced force transformation mechanism, organization volume is substantially reduced, and agency cost drastically declines, material
Material consumption is significantly reduced, and cost is substantially reduced and environmental, and then particularly has tool in the product much limited to some
There is unusual significance.
General principle of the present utility model and principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the utility model spirit and scope are not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within the range of claimed the utility model.The utility model
Claimed scope is by appended claims and its equivalent thereof.
Claims (10)
1. a kind of new negative characteristic pulling force scrollwork extension spring, it is characterised in that including an elongated metal flexure strip with equal in width
Wind the multi-turn formed and be mutually adjacent between often enclosing, profile is for hollow cylindric scroll portion and by the scroll portion outermost layer
Metallic elastic piece extends one section of a stretching end；The metallic elastic piece stretches out when evening up, and the metallic elastic piece is from stretching end
On to interior extreme direction, the metallic elastic piece gradually successively decreases perpendicular to the effective area of the cross sectional area of draw direction, i.e. the gold
Category flexure strip thickness successively decreases along along stretching end to interior extreme direction.
2. a kind of new negative characteristic pulling force scrollwork extension spring according to claim 1, it is characterised in that the metallic elastic piece
Stretching end is inside provided with to inner width gradually incremental elongated hole.
3. a kind of new negative characteristic pulling force scrollwork extension spring according to claim 2, it is characterised in that the two of the elongated hole
The long side in side is with the symmetrical curve of the axis of symmetry of elongated metal spring leaf.
4. a kind of new negative characteristic pulling force scrollwork extension spring according to claim 3, it is characterised in that the curve is arc
Line.
5. a kind of new negative characteristic pulling force scrollwork extension spring according to claim 3, it is characterised in that the curve is straight
Line.
6. a kind of new negative characteristic pulling force scrollwork extension spring according to Claims 1-4 any one, it is characterised in that institute
It is that at least two panels sheet metal is close to composite integrated and winds the scroll portion to be formed to state metallic elastic piece.
7. a kind of new negative characteristic pulling force scrollwork extension spring according to claim 1, it is characterised in that the institute of metallic spring
State stretching end and be provided with pulling eye or pull hook.
8. a kind of new negative characteristic pulling force scrollwork extension spring according to claim 1, it is characterised in that the elongated hole it is each
Turning is set to fillet.
9. a kind of new negative characteristic pulling force scrollwork extension spring according to claim 1, it is characterised in that the metallic elastic piece
For elastic steel sheet.
10. a kind of new negative characteristic pulling force scrollwork extension spring according to claim 1, it is characterised in that the elongated hole is adopted
It is pinnacle trapezoidal hole, the top width of the pinnacle trapezoidal hole is less than the bottom width of pinnacle trapezoidal hole, the pinnacle ladder
The top in shape hole is close to the outer end of the metallic elastic piece, and the bottom width of the pinnacle trapezoidal hole is less than the width of metallic elastic piece
Degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621419357.4U CN206545660U (en) | 2016-12-22 | 2016-12-22 | A kind of new negative characteristic pulling force scrollwork extension spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621419357.4U CN206545660U (en) | 2016-12-22 | 2016-12-22 | A kind of new negative characteristic pulling force scrollwork extension spring |
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| Publication Number | Publication Date |
|---|---|
| CN206545660U true CN206545660U (en) | 2017-10-10 |
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ID=59993363
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621419357.4U Active CN206545660U (en) | 2016-12-22 | 2016-12-22 | A kind of new negative characteristic pulling force scrollwork extension spring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107061578A (en) * | 2016-12-22 | 2017-08-18 | 泰州市创新电子有限公司 | A kind of new negative characteristic pulling force scrollwork extension spring |
-
2016
- 2016-12-22 CN CN201621419357.4U patent/CN206545660U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107061578A (en) * | 2016-12-22 | 2017-08-18 | 泰州市创新电子有限公司 | A kind of new negative characteristic pulling force scrollwork extension spring |
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