CN206647475U - A kind of negative characteristic pulling force scrollwork extension spring - Google Patents
A kind of negative characteristic pulling force scrollwork extension spring Download PDFInfo
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- CN206647475U CN206647475U CN201621424619.6U CN201621424619U CN206647475U CN 206647475 U CN206647475 U CN 206647475U CN 201621424619 U CN201621424619 U CN 201621424619U CN 206647475 U CN206647475 U CN 206647475U
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- pulling force
- elastic piece
- metallic elastic
- scroll portion
- extension spring
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Abstract
The utility model relates to a kind of negative characteristic pulling force scrollwork extension spring, including a metallic elastic piece with equal thickness 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；The metallic elastic piece for stating scroll portion winding is stretching flattening by the stretching end, if being elongated direction from stretching end to scroll portion, the elongated direction of metallic elastic piece interior edge is provided with the gradual increased elongated hole of the width perpendicular to elongated direction.The utility model will greatly reduced force transformation mechanism, organization volume is substantially reduced, and agency cost drastically declines, and material consumption significantly reduces, cost substantially reduces and environmental, and then particularly has to some and have unusual significance in the product much limited.
Description
Technical field
The utility model relates to a kind of extension spring, and in particular to be a kind of 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, constant force volute spring includes a thin metallic elastic piece with equal thickness and winds the multi-turn to be formed and often enclose
Between be mutually adjacent to, the scroll portion of profile generally hollow cylindrical and one section of a drawing extended by scroll portion outermost metal piece
End is stretched, 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
It is that the spring tension exported is more constant, tension variations are minimum.All it is that constant force spring stretching is directly opened into work directly during actual use
Displacement of the lines is moved, 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
Only its bigger caused elastic force of any camber of spring is about big, and root is deeply solid among the consciousness of people already.Specific such as one
For kind 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）Because its actual configuration limits, 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 the continuous development of 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
Power source of the constant force tension spring as lifting balance device, 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, for example 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, need a set of switching mechanism to be in turn adapted to existing various balances
In the device that device and the output of various requirement pulling force gradually decrease, 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, for example 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
It is subversive change, greatly reduced force transformation mechanism, organization volume will be substantially reduced, agency cost drastically declines, material
Consumption significantly reduces, and cost substantially reduces 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 purpose of the utility model be to provide a kind of spring its stretch it is longer but
Pulling force smaller negative characteristic pulling force vortex extension spring is big to change pulling force by changing metallic elastic piece cross section effective width
It is small, and Stability Analysis of Structures, it is unlikely to deform, processing is simple, and cost is cheap, can be widely applied to the various requirement pulling force for having particular/special requirement
Export in the bascule gradually decreased.
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 a metallic elastic piece with equal thickness wind the multi-turn to be formed and every
Mutually it is adjacent between circle, profile extends one section for hollow cylindric scroll portion and by the scroll portion outermost metal flexure strip
One stretching end；Characterized in that, set from stretching end to scroll portion direction as elongated direction, the metal elastic of the scroll portion winding
Property piece when stretching flattening by the stretching end, the effective work width of the metallic elastic piece along the elongated direction gradually
Successively decrease, the pulling force of metallic elastic piece is also successively decreased with the effective work width of metallic elastic piece and is accordingly successively decreased.
Further, the width that the elongated direction of metallic elastic piece interior edge is provided with perpendicular to elongated direction gradually increases
Elongated hole；The cross-sectional direction of metallic elastic piece, the useful area area of its metal is described in the elongated hole length section
Elongated direction is gradually successively decreased, and the effective work width of the metallic elastic piece in the length section of the elongated hole is gradually successively decreased, elasticity
Pulling force also accordingly successively decreases therewith.
Further, the both sides long side of the elongated hole is arranged to the symmetrical curve of the axis of symmetry of metallic elastic piece.
According to above-mentioned characteristic pulling force scrollwork extension spring, wherein, the curve is curved line.
According to above-mentioned characteristic pulling force scrollwork extension spring, wherein, the curve is straight line.
According to above-mentioned characteristic pulling force scrollwork extension spring, wherein, the metallic elastic piece of the volute spring is at least two
Piece is close to composite integrated and winds to form scroll portion.
According to above-mentioned characteristic pulling force scrollwork extension spring, wherein, the stretching end of the metallic elastic piece is provided with pulling eye or drawing
Hook.
According to above-mentioned characteristic pulling force scrollwork extension spring, wherein, the elongated hole is trapezoidal hole, each turning of the trapezoidal hole
Fillet is arranged to, to reduce stress concentration, extend the metallic elastic piece life-span.
According to above-mentioned characteristic pulling force scrollwork extension spring, wherein, the metallic elastic piece is elastic steel sheet.
A kind of negative characteristic pulling force vortex extension spring, including a metallic elastic piece wind the multi-turn to be formed and mutually pasted between often enclosing
Tightly, profile extends one section of a stretching end for hollow cylindric scroll portion and by the scroll portion outermost metal flexure strip；
The metallic elastic piece of the scroll portion winding by the stretching end when stretching flattening, if being elongated side from stretching end to scroll portion
, the metallic elastic piece is provided with pulling force to successively decrease area, the metallic elastic piece width that the pulling force successively decreases in area is along described elongated
Direction is gradually successively decreased, and effective work width of the metallic elastic piece in the length section that the pulling force successively decreases area is gradually successively decreased,
Elastic pulling force also accordingly successively decreases therewith.
Further, the metallic elastic piece, which is at least two panels and is close to composite integrated, winds to form scroll portion.
The utility model is reached by setting effective width of the spring foil metal from stretching end to the inner gradually to successively decrease
The smaller situation of pulling force is more elongated, complies with the device that the output of various requirement pulling force gradually decreases, reduces spring counteracting
The use of active force, greatly reduced force transformation mechanism, organization volume it will be substantially reduced, agency cost drastically declines, and material disappears
Consumption significantly reduces, and cost substantially reduces and environmental, and then particularly have to some in the product much limited have it is non-
With ordinary significance, its Stability Analysis of Structures, it is unlikely to deform, processing is simple, can be widely applied to various bascules and each
Kind is required in the device that pulling force output gradually decreases.
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.
Fig. 3 is another example structure schematic diagram of the present utility model.
Embodiment
Technological means, creation characteristic, reached purpose and effect to realize the utility model are easy to understand, below
With reference to embodiment, the utility model is expanded on further.
Embodiment 1：
Referring to Fig. 1 and Fig. 2, a kind of negative characteristic pulling force vortex extension spring of the present embodiment, including one have equal thickness metal
Flexure strip 10 winds the multi-turn formed and is mutually adjacent between often enclosing, profile is for hollow cylindric scroll portion 20 and by the whirlpool
The outermost metal flexure strip of rotation portion 20 extends one section of a stretching end 21；The metallic elastic piece that the scroll portion 20 is wound is by institute
State stretching end 21 and stretch flattening, if being elongated direction from stretching end 21 to scroll portion 20, the interior edge of metallic elastic piece 10 is elongated
Direction is provided with the gradual increased elongated hole 11 of width perpendicular to elongated direction, or from the cross section side of metallic elastic piece 10
To the effective work width of its metal gradually successively decreases along the elongated direction in the length section of elongated hole 11, makes elongated at this
The effective work width of metallic elastic piece 10 gradually successively decreases in the length section in hole 11, and elastic pulling force also accordingly successively decreases therewith.
The present embodiment, effective work width refers to the effective length in metallic elastic piece cross-sectional direction, that is, has gold
The length sum that belong to has area on the cross section of elasticity is referred to as effective length.
Further, the both sides long side of the elongated hole 11 on the metallic elastic piece is with the symmetrical of metallic elastic piece
The curve of axisymmetrical, the curve are 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 elastic piece 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 hole 11 is arranged to fillet, to reduce
Stress concentration, extend the metallic elastic piece life-span.In the present embodiment, the metallic elastic piece is elastic steel sheet.
Embodiment 2：
Referring to Fig. 3, a kind of negative characteristic pulling force vortex extension spring of the present embodiment, including a metallic elastic piece 10 winding formation
Multi-turn and be mutually adjacent between often enclosing, profile is for hollow cylindric scroll portion 20 and by the outermost metal bullet of scroll portion 20
Property piece extend one section one stretching end 12；The metallic elastic piece 10 that the scroll portion 20 is wound is stretching exhibition by the stretching end 12
Usually, if being direction from stretching end 12 to scroll portion, the metallic elastic piece 10 is provided with pulling force and successively decreased area 30, and the pulling force is passed
The metallic elastic piece width subtracted in area 30 gradually successively decreases along the elongated direction, the metallic elastic piece is successively decreased area in the pulling force
Length section in effective work width gradually successively decrease, elastic pulling force also accordingly successively decreases therewith.
Further, the metallic elastic piece 10 is at least two panels and is close to composite integrated and winds to form scroll portion.
But gone to draw two different springs with an equal amount of power, the length of elongation is different, and 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 can also use, spring foil metal is by stretching end extremely
The mode of inner thickness-tapered is realized.
The utility model is reached by setting effective width of the spring foil metal from stretching end to the inner gradually to successively decrease
The smaller situation of pulling force is more elongated, complies with the device that the output of various requirement pulling force gradually decreases, reduces spring counteracting
The use of active force, the use range of spring is greatly expanded, its Stability Analysis of Structures, be unlikely to deform, processing is simple, can extensive use
In the device that various bascules and the output of various requirement pulling force gradually decrease.
The advantages of general principle and principal character of the present utility model and the 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 spirit and scope of the utility model is not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within claimed the scope of the utility model.The utility model
Claimed scope is by appended claims and its equivalent thereof.
Claims (10)
1. a kind of negative characteristic pulling force scrollwork extension spring, including a metallic elastic piece with equal thickness wind the multi-turn to be formed and often enclosed
Between be mutually adjacent to, profile extends one section for hollow cylindric scroll portion and by the scroll portion outermost metal flexure strip
One stretching end；Characterized in that, set from stretching end to scroll portion direction as elongated direction, the metallic elastic of the scroll portion winding
Piece when stretching flattening by the stretching end, along the elongated direction gradually pass by the effective work width of the metallic elastic piece
Subtract, the pulling force of metallic elastic piece is also successively decreased with the effective work width of metallic elastic piece and is accordingly successively decreased.
A kind of 2. negative characteristic pulling force scrollwork extension spring according to claim 1, it is characterised in that the metallic elastic piece interior edge
Elongated direction is provided with the gradual increased elongated hole of width perpendicular to elongated direction.
A kind of 3. negative characteristic pulling force scrollwork extension spring according to claim 2, it is characterised in that the both sides length of the elongated hole
While it is arranged to the symmetrical curve of the axis of symmetry of metallic elastic piece.
4. a kind of negative characteristic pulling force scrollwork extension spring according to claim 3, it is characterised in that the curve is curved line.
5. a kind of negative characteristic pulling force scrollwork extension spring according to claim 3, it is characterised in that the curve is straight line.
A kind of 6. negative characteristic pulling force scrollwork extension spring according to claim 1 to 5 any one, it is characterised in that the gold
Category flexure strip, which is at least two panels and is close to composite integrated, to wind to form scroll portion, and the stretching end of the metallic elastic piece is provided with pulling eye
Or pull hook.
A kind of 7. negative characteristic pulling force scrollwork extension spring according to claim 1 to 5 any one, it is characterised in that the length
Shape hole is trapezoidal hole, and each turning of the trapezoidal hole is arranged to fillet.
8. a kind of negative characteristic pulling force scrollwork extension spring according to claim 1, it is characterised in that the metallic elastic piece is bullet
Property steel disc.
9. a kind of negative characteristic pulling force scrollwork extension spring, including a metallic elastic piece with equal thickness wind the multi-turn to be formed and often enclosed
Between be mutually adjacent to, profile extends one section for hollow cylindric scroll portion and by the scroll portion outermost metal flexure strip
One stretching end；Characterized in that, the metallic elastic piece of scroll portion winding is by the stretching end when stretching flattening, if from drawing
It is elongated direction to stretch end to scroll portion, and the metallic elastic piece is provided with pulling force and successively decreased area, and the pulling force successively decreases the metal in area
Flexure strip width gradually successively decreases along the elongated direction, makes metallic elastic piece the having in the length section that the pulling force successively decreases area
Effect working width gradually successively decreases, and elastic pulling force also accordingly successively decreases therewith.
10. a kind of negative characteristic pulling force scrollwork extension spring according to claim 9, it is characterised in that the metallic elastic piece is extremely
It is close to composite integrated less for two panels to wind to form scroll portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621424619.6U CN206647475U (en) | 2016-12-22 | 2016-12-22 | A kind of negative characteristic pulling force scrollwork extension spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621424619.6U CN206647475U (en) | 2016-12-22 | 2016-12-22 | A kind of negative characteristic pulling force scrollwork extension spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206647475U true CN206647475U (en) | 2017-11-17 |
Family
ID=60284104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621424619.6U Expired - Fee Related CN206647475U (en) | 2016-12-22 | 2016-12-22 | A kind of negative characteristic pulling force scrollwork extension spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206647475U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641051A (en) * | 2016-12-22 | 2017-05-10 | 泰州市创新电子有限公司 | Negative characteristic tensile force vortex roll tension spring |
-
2016
- 2016-12-22 CN CN201621424619.6U patent/CN206647475U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641051A (en) * | 2016-12-22 | 2017-05-10 | 泰州市创新电子有限公司 | Negative characteristic tensile force vortex roll tension spring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20171117 Termination date: 20201222 |