CN208388408U - Coil spring and cooking utensil - Google Patents
Coil spring and cooking utensil Download PDFInfo
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- CN208388408U CN208388408U CN201721426966.7U CN201721426966U CN208388408U CN 208388408 U CN208388408 U CN 208388408U CN 201721426966 U CN201721426966 U CN 201721426966U CN 208388408 U CN208388408 U CN 208388408U
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- 238000010411 cooking Methods 0.000 title claims description 25
- 230000006835 compression Effects 0.000 claims abstract description 26
- 238000007906 compression Methods 0.000 claims abstract description 26
- 230000003068 static effect Effects 0.000 claims description 41
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000013201 Stress fracture Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
A coil spring, comprising: a spiral portion including a plurality of coils, the spiral portion including a middle spiral portion and an end spiral portion connected to each other; the end arms are respectively connected with the end part spiral part and comprise at least one rotating force arm; the middle diameter of the spring ring of the end spiral part at least connected with the rotating arm is larger than that of the middle spiral part. The utility model provides a coil spring can make this coil spring receive the rotatory compression back of external force, first spring coil can not with the second spring coil between contact or produce the friction, can avoid this coil spring to produce fracture or inefficacy in the great first spring coil department of atress from this, has improved this coil spring's whole life-span from this.
Description
Technical field
The utility model relates to spring technical fields, and in particular to a kind of helical spring and the culinary art kitchen with the spring
Tool.
Background technique
Helical spring as elastic element, it is simple with structure, easily manufactured and with it is high must can capacity, in modern machine
It is generally applicable in device.And the hinge bullet spring knot in other cooking utensils products such as existing electric cooker and electric pressure cooking saucepan
The value of structure, the axial gap δ between the central diameter D and spring two adjacent rings of such hinge spring structure is fixed value, due to
Such mean diameter of coil and axial gap are fixed, and when spring is acted on by torque to be compressed, the 1st coil spring circle can squeeze in twist process
It presses the 2nd coil spring circle and generates friction, therefore can increase and rub because of the reduction in gap between adjacent spring ring and spring ring
It wipes, to influence the elastic characteristic of spring and be concentrated mainly on load on the 1st coil spring, be easy to cause the disconnected of the first coil spring
It splits to cause spring failure, reduces elastic efficiency and the service life of spring.
Using the folding lid longevity of other cooking utensils such as the electric cooker of hinge spring in the prior art or electric pressure cooking saucepan
Number is ordered, the general < of folding lid number 50,000 times, the access times of other cooking utensils such as electric cooker or electric pressure cooking saucepan are once big
In this numerical value, just easily there is the phenomenon that spring breakage, seriously affected the experience effect of user, is used to solve above-mentioned spring
Service life short problem, the utility model describe a kind of hinge spring for other cooking utensils such as electric cooker and electric pressure cooking saucepans
Structure.
Utility model content
Therefore, the technical problem to be solved by the present invention is to overcome the service life of hinge spring in the prior art
The short defect being easily broken in first lap, to provide a kind of helical spring and the cooking utensils with the spring.
For this purpose, whole technical solutions of the utility model are as follows:
A kind of helical spring comprising:
Spire, the spire include multiple spring rings, the spire include the middle spiral portion interconnected and
End convolution portion；
And at least two end arms, the end arms are connect with the end convolution portion respectively, the end arms includes at least one
A rotary arm；
The central diameter of the spring ring in the end convolution portion at least connecting with the rotary arm is greater than the spring in middle spiral portion
The central diameter of circle.
Further, the end arms is two, one of them is rotary arm, another is the static arm of force, the static state
The arm of force is connect with adjacent component static state, to spire described in the static arm of force rotary compression after the rotary arm stress.
Further, the length of the rotary arm is greater than the length of the static arm of force.
Further, the end convolution portion is an end spring circle connecting with the end arms, the middle spiral
Portion is cylindrical spring.
Further, the central diameter for another end spring circle connecting with the static arm of force is greater than the middle spiral portion
Spring ring central diameter.
Further, the section being attached at least between the end spring circle of the rotary arm and adjacent spring ring
Away from the pitch between the spring ring for being greater than the middle spiral portion.
Further, the pitch difference being connected between the end spring circle and adjacent spring ring of two end arms is big
Pitch between the spring ring in the middle spiral portion.
Further, the end convolution portion at least connecting with the rotary arm is cone-type spiral portion, the middle part
Spire be cylindrical coil portion, the cone-type spiral portion be connect with the rotary arm and central diameter along spring ring compression direction by
The small volute spring of gradual change, the cylindrical coil portion are the cylinder connecting respectively with the cone-type spiral portion and the static arm of force
Spring, wherein the central diameter of the spring ring in cylindrical coil portion is less than or equal to the minimum central diameter of the spring ring in the cone-type spiral portion.
Further, the end convolution portion connecting with the static arm of force is another cone-type spiral portion, wherein another taper
Spire is the volute spring being set between the cylindrical coil portion and the static arm of force, close institute in another shape spire
The central diameter for stating the spring ring of the static arm of force is greater than the central diameter of the spring ring far from the static arm of force, another cone-type spiral portion
In minimum central diameter be more than or equal to the cylindrical coil portion spring ring central diameter.
Further, the pitch between the spring ring in at least described cone-type spiral portion is greater than the spring in the cylindrical coil portion
Pitch between circle.
Further, the pitch between the spring ring in the cone-type spiral portion, another cone-type spiral portion is all larger than institute
State the pitch between the spring ring in cylindrical coil portion.
Further, the end arms is two, and two end arms are rotary arm, and two rotary arms are in
End convolution portion described in heart rotary compression.
Further, the end convolution portion is two end spring circles connecting respectively with the rotary arm,
The central diameter of two end spring circles is all larger than the central diameter of the spring ring in the middle spiral portion.
Further, it is connected between two end spring circles of two rotary arms and adjacent spring ring
Pitch be all larger than the pitch between the spring ring in the middle spiral portion.
Further, two end convolution portions are cone-type spiral portion, and the middle spiral portion is cylindrical coil portion,
The cone-type spiral portion is to connect respectively with two rotary arms and central diameter is along the gradually smaller cone of spring ring compression direction
Shape spring, the cylindrical coil portion are the cylindrical spring that both ends are connect with two cone-type spiral portions respectively, wherein cylindricality spiral shell
The central diameter of the spring ring in rotation portion is less than or equal to the minimum central diameter of the spring ring in the cone-type spiral portion.
Further, the pitch between the spring ring in the cone-type spiral portion be greater than the cylindrical coil portion spring ring it
Between pitch.
Further, wherein any one or more end convolution portions are set as spiral of Archimedes spring.
A kind of cooking appliance comprising: lid and ontology, the ontology and the lid are articulated and connected；
Wherein be socketed on the articulated shaft of the ontology and the lid junction described in above-mentioned any one one or
Multiple helical springs.
Technical solutions of the utility model have the advantages that
1. helical spring provided by the utility model, the central diameter due to will be close to first spring ring at rotary arm is set
The central diameter greater than 2~n coil spring circle is set, or central diameter will be set as along compression side with the one of rotary arm junction section of spring
To the volute spring being gradually reduced, it may make the helical spring after by external force rotary compression, first spring ring will not be with second
Friction is contacted or generated between spring ring, thus be can avoid the helical spring and is generated at biggish first spring ring of stress
Fracture or failure, which thereby enhance the bulk life time of the helical spring.
2. helical spring provided by the utility model, by will be close to first spring ring and the second bullet at rotary arm
Gap setting between spring coil is that or will be close between former circles at rotary arm greater than the gap between subsequent spring ring
Gap is set greater than the gap between subsequent spring ring, or is by the gap setting between each spring ring of the helical spring
It is gradually reduced along forced compression direction, it thus can be made when working torsional deflection, enough gaps can be reserved and avoid influencing
The normal transmitting of power, the i.e. helical spring of above structure, so that spring is during torsional deflection, between spring ring and spring ring
Will not because of gap reduction and increase friction, which thereby enhance the reliability of spring.
3. helical spring provided by the utility model passes through the first lap spring ring or taper that will be connect with rotary arm
Spring is set as spiral of Archimedes structure, so that front springs circle stress deformation is inside after rotary arm receives load
During compressing the generation displacement of rear end spring ring, it can avoid because without that can not continue to transmit torsion backward caused by enough gaps
Power.
4. helical spring provided by the utility model, longer by the way that the rotary arm of stress to be arranged, can avoid because of stress
By being broken or failing caused by larger torsion, above-mentioned setting can effectively subtract first spring ring caused by the arm of force is shorter
The torsion being subject at small first spring ring, to improve the service life of spring.
5. cooking utensils provided by the utility model, have in the hinge torsionspring of superstructure weight, hinge portion
Under the premise of effect circle number n, spring filament diameter d, minimum Work-corner Tmin and maximum functional corner Tmax are constant, only pass through
Improve the circle of axial gap δ and the 1st of hinge spring or the central diameter D of former coil spring circles, that is, can be improved what such culinary art was provided
The opening/closing frequency of lid, to improve the whole service life of such cooking utensils.
6. cooking utensils provided by the utility model are reduced spring breakage risk and are mentioned due to the above-mentioned torsional spring of use
While rising spring life, being able to ascend electric cooker, electric pressure cooking saucepan etc., other have the folding for opening the lid of cooking utensils of lid
Number reduces maintenance cost and number that such culinary art is provided to indirectly improve the service life of such cooking utensils,
Finally user is improved to the usage experience of such cooking utensils.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the cover body structure schematic diagram of the cooking utensils of the utility model；
Fig. 2 is the main view of cover body structure shown in FIG. 1；
Fig. 3 is torsion spring structure diagram shown in Fig. 1；
Fig. 4 is torsional spring structural front view shown in Fig. 3；；
Fig. 5 is the A partial enlarged view of torsional spring structure shown in Fig. 4；
Fig. 6 is the top view of torsional spring structure shown in Fig. 3；
Fig. 7 is the left view of torsional spring structure shown in Fig. 3；
Fig. 8 is the right view of torsional spring structure shown in Fig. 3；
Description of symbols:
1- lid；11- inner cover；
2- hinge axis；3- hinge shaft sleeve
4- torsional spring；41- spire；411- end convolution portion；412- middle spiral portion；4111- first end spring ring；
The other end 4112- spring ring；42- rotary arm；The 43- static state arm of force；
5- hinge stiffening plate；
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Not constituting conflict can be combined with each other.
Embodiment 1
The present embodiment describes a kind of cooking appliance, such as electric cooker, electric pressure cooking saucepan etc., which mainly includes lid
Body 1 and ontology, and ontology and lid 1 be by hinge axis articulated connection, as shown in Fig. 1-2, the wherein inner cover of ontology and lid 1
11 are connected by hinge stiffening plate 5 and hinge axis 2, are wherein socketed with one or more helical springs on hinge axis 2.The present embodiment
In helical spring use straight-arm torsional spring 4.Lid 1 is connect by hinge stiffening plate 5 and hinge axis 2 with ontology, hinge stiffening plate 5
On be provided with multiple hinge shaft sleeves 3 of fixed supporting hinges axis 2, hinge axis 2 sequentially passes through each hinge shaft sleeve 3, while hinge
The both ends of axis 2 are fixedly connected with inner cover 11 respectively, and torsional spring 4 is set on hinge axis 2, two end arms of torsional spring 4 respectively with hinge
Chain stiffening plate 5 is connected with ontology.
As shown in figure 3, the torsional spring 4 in the present embodiment 1 comprising: spire 41 and two end arms, spire 41 are multiple
Spring ring, spire 41 include the end convolution portion 411 and middle spiral portion 412 interconnected.Two ends in the present embodiment 1
One in arm is rotary arm 42, another is the static arm of force 43, and the static arm of force 43 is static fixed with adjacent hinge stiffening plate 5
Connection (wherein static fixation refers to that the static arm of force 43 is fixedly connected with what adjacent component was not subjected to displacement), rotary arm 42 is by outer
The arm of force of spire is rotated and compressed after power, wherein to static 43 rotary compression spiral of the arm of force after 42 stress of rotary arm
Portion 41.
As shown in Figures 3 and 5, two end convolution portions in the present embodiment 1 are respectively a first end spring ring 4111
With the other end spring ring 4112, wherein first end spring ring 4111 and the other end spring ring 4112 are positioned at 4 liang of torsional spring
The coil spring circle of end being connect with end arms, wherein rotary arm 42 and the static arm of force 43 respectively with first end spring ring
4111 and the other end spring ring 4112 connect, connected between first end spring ring 4111 and the other end spring ring 4112
There is middle spiral portion 412.As seen in figs. 5-6, the middle spiral portion 412 in the present embodiment is cylindrical spring, it is assumed that torsional spring 4 has altogether
Including n spring ring, then middle spiral portion 412 includes n-2 spring ring outside two end spring circles for remove end.
In the present embodiment, the first end spring ring 4111 connecting with rotary arm 42 is spiral of Archimedes shape
Spring, and its central diameter is D1, the central diameter of the spring ring in middle spiral portion 412 is D.Wherein in first end spring ring 4111
Diameter D1Value with the central diameter D of the spring ring in middle spiral portion, can be according to practical dress under the premise of meeting spring design specification
Suitable numerical value is chosen with position, usually meets D1/ D=1.1~1.3 or D1The one of condition of-D=1~3mm.
And the value that is normally set up of its central diameter of the torsional spring in small household appliances field D isD is preferably used at this time1- D=1~3mm
The central diameter D of first end spring ring 4111 is arranged in mode1.At this point, even if first end spring ring 4111 is by rotary arm 42
Rotary compression generates axial displacement to 4112 direction of the other end spring ring, due to D1> D, therefore first end spring ring 4111
Although stress compresses adjacent second spring ring backward, it will not be in contact or generate with second spring ring and is larger
Frictional force, thus both improved the whole service life of torsional spring 4, the torsion transmitting and spring in turn avoiding torsional spring 4 store energy
The loss of amount.
In the present embodiment 1, for further decrease the end of torsional spring 4 generated during forced compression because of forced contact compared with
Big friction, the pitch δ between first end spring ring 4111 and second adjacent spring ring1Greater than the spring in middle spiral portion
Pitch δ between circle, wherein since the torsional spring 4 is in the cooking appliance of small household appliances field, the setting value of δ selects 0.1~
0.5mm, it is preferred to use 0.5mm, at this time δ1Set-up mode be δ1> δ, and δ1- δ=0.3~0.5mm.
As shown in figure 3, the length L1 of the rotary arm 42 in the present embodiment is greater than the length L2 of the static arm of force 43, pass through increasing
The length of rotational force arm 42 is conducive to reduce the stress for the first lap spring ring end for being applied to torsional spring 4, to avoid spring
The failure that circle, especially 4111 stress of first end spring ring are larger and generate, the entirety for thus improving torsional spring 4 use the longevity
Life.
Further, on the basis of the technical solution of above-described embodiment 1, for avoid torsional spring 4 the static arm of force 43 end
Portion generates fatigue failure or energy loss due to by larger frictional force, the other end spring that can will be connect with the static arm of force 43
The central diameter D of circle 4112nIt is also configured as the central diameter D of the spring ring greater than middle spiral portion 412.Above-mentioned setting is so that the (n-1)th circle bullet
When spring coil stress compresses the other end spring ring 4112 for being located at the n-th circle backward, the other end spring ring 4112 will not be with the
N-1 coil spring circle is in contact or generates biggish frictional force, has thus not only improved the whole service life of torsional spring 4, but also keep away
The loss of the torsion transmitting and spring storage energy of torsional spring 4 is exempted from.The central diameter D of certain the other end spring ring 4112nIt can set
It is set to the central diameter D equal to first end spring ring 41111, may be set to be the central diameter not equal to first end spring ring 4111
D1.Certainly at this point, can also be by the section between the static the other end spring ring 4112 connecting of the arm of force 43 and adjacent coils
Away from δnIt is set greater than δ, certain δnIt can be set to be equal to δ1, may be set to be not equal to δ1。
As interchangeable embodiment, the end convolution portion connecting with rotary arm 42 may be configured as the first cone-type spiral
Portion, the first cone-type spiral portion are connect with the spring ring of rotary arm 42 and cylindrical coil portion respectively, the other end in cylindrical coil portion
It is connect by the other end spire with the static arm of force 43.First cone-type spiral portion is that central diameter gradually becomes along spring ring compression direction
Small volute spring, i.e. central diameter in the first cone-type spiral portion close to the spring ring of rotary arm 42 are greater than far from rotary arm 42
Spring ring central diameter.Cylindrical coil portion is the cylinder bullet connecting respectively with the first cone-type spiral portion and the other end spire
Spring, wherein the central diameter of the spring ring in cylindrical coil portion is less than or equal to the minimum central diameter of the spring ring in the first cone-type spiral portion.And make
The spring of spiral of Archimedes shape is preferably used for the volute spring in the first cone-type spiral portion.Further, at this time
The other end spire connecting with the static arm of force 43 can be set to the second cone-type spiral portion, during the second cone-type spiral portion is also
For diameter along the gradually smaller volute spring of spring ring compression direction, the second cone-type spiral portion is set to cylindrical coil portion and the static arm of force
Between 43.Wherein the second cone-type spiral portion is central diameter along the gradually smaller volute spring of spring ring compression direction, i.e., the second cone
Central diameter in shape spire close to the central diameter of the spring ring of the static state arm of force 43 greater than the spring ring far from the static arm of force 43, second
Minimum central diameter in cone-type spiral portion is more than or equal to the central diameter of the spring ring in cylindrical coil portion, while as the second cone-type spiral portion
Volute spring preferably use the spring of spiral of Archimedes shape.Above-mentioned setting equally can avoid the other end of torsional spring 4
Fatigue failure or energy loss are generated due to by larger frictional force.Certain second spire may be configured as and the first spire phase
Same symmetrically arranged volute spring, may be alternatively provided as the central diameter volute spring different from the first spire.Further, this
One, the pitch between the spring ring in the second cone-type spiral portion may be configured as the pitch between the spring ring greater than middle spiral portion
δ, the pitch between the spring ring in certain first cone-type spiral portion may be configured as between the spring ring equal to the second cone-type spiral portion
Pitch or the first cone-type spiral portion spring ring between pitch may be alternatively provided as the bullet not equal to the second cone-type spiral portion
Pitch between spring coil, it is only necessary to meet the pitch between the spring ring in the first, second cone-type spiral portion and be respectively greater than middle part spiral shell
Pitch between rotation portion.
As interchangeable embodiment, end convolution portion and/or the other end spire may be alternatively provided as including multiple
Etc. central diameters spring ring cylindrical spring, the pitch between multiple spring rings of 42 side of close rotary arm settable at this time is δ1,
Such as the pitch that will be close in 42 1~m of side of rotary arm circle between two spring rings of arbitrary neighborhood is set as δ1, m~n circle
Pitch between two spring rings of middle arbitrary neighborhood is set as δ, natural number of the m between 1~n, wherein δ1> δ, and δ1- δ=0.3
~0.5mm.
Embodiment 2
In the present embodiment 2, two end arms of torsional spring 4 are rotary arm 42, and two rotary arms 42 are rotated to center presses
Contracting spire 41, wherein the first end spring ring 4111 and the other end spring ring that are connect respectively with the rotary arm 42 of two sides
4112 central diameter is all larger than the central diameter of the spring ring in middle spiral portion 412.Specifically, positioned at the first end spring ring at both ends
4111 and the other end spring ring 4112 be spiral of Archimedes shape spring, their central diameter is D1, it is located at
Between middle spiral portion 2~n-1 coil spring circle central diameter be D.Wherein D1Value with D is meeting spring design specification
Under the premise of, suitable numerical value can be chosen according to practical set position, usually meet D1/ D=1.1~1.3 or D1- D=1~
The one of condition of 3mm.And the value that is normally set up of its central diameter of the torsional spring in small household appliances field D isIt is excellent at this time
Choosing uses D1The central diameter D of first end spring ring 4111 is arranged in-D=1~3mm mode1.At this point, even if first end spring ring
4111 are generated axial displacement by the rotary compression of rotary arm 42, due to D1> D, although therefore first end spring ring 4111 by
Power compresses second spring ring backward, will not be in contact or generate biggish frictional force with second spring ring, by
This had both improved the whole service life of torsional spring 4, in turn avoided the loss of the torsion transmitting and spring storage energy of torsional spring 4.
In the present embodiment 2, larger friction is generated during forced compression to further decrease torsional spring 4, both ends are set
Pitch between first end spring ring 4111 and the other end spring ring 4112 and adjacent spring ring is δ1, δ1In being greater than
Pitch δ in portion's spire 412 between two neighboring spring ring, wherein the torsional spring 4 is used in the cooking appliance of small household appliances field, δ
Setting value select 0.1~0.5mm, it is preferred to use 0.5mm, at this time δ1Set-up mode be δ1> δ, and δ1- δ=0.3~0.5
mm。
As interchangeable embodiment, the central diameter of first end spring ring 4111 and the other end spring ring 4112 can
It is set as unequal, the central diameter that need to only meet first end spring ring 4111 and the other end spring ring 4112 is respectively greater than
The central diameter D of the spring ring of portion's spire.
As interchangeable embodiment, first end spring ring 4111 and the other end spring ring 4112 and adjacent
Pitch between spring ring may be configured as unequal, need to only meet section between first end spring ring 4111 and adjacent coils
Away from and pitch between the other end spring ring 4112 and adjacent coils be respectively greater than between the spring ring in middle spiral portion
Pitch δ.
As interchangeable embodiment, end convolution portion can be set to cone-type spiral portion, and middle spiral portion is cylindricality
Spire, two of them cone-type spiral portion are connect with rotary arm 42 and cylindrical coil portion respectively.Cone-type spiral portion is central diameter edge
The gradually smaller volute spring of spring ring compression direction, cylindrical coil portion are cylindrical spring, wherein the spring ring in cylindrical coil portion
Central diameter be less than or equal to cone-type spiral portion spring ring minimum central diameter.And the volute spring as cone-type spiral portion is preferably adopted
With the spring of spiral of Archimedes shape.Certain two cone-type spiral portions may be configured as identical symmetrically arranged Conical Projectile
Spring may be alternatively provided as two different independent volute springs of central diameter.Further, the spring ring in two cone-type spiral portions
Between pitch may be configured as the pitch δ between the spring ring greater than middle spiral portion, be located at the taper spiral shell of two ends certainly
Pitch between the spring ring in rotation portion may be configured as equal or unequal, it is only necessary to meet the spring ring in two cone-type spiral portions
Between pitch be respectively greater than the pitch between middle spiral portion.
As interchangeable embodiment, end convolution portion may be alternatively provided as include multiple spring rings cylindrical spring, can
The pitch between multiple spring rings to be arranged close to 42 side of both ends rotary arm is δ1, such as will be close to both ends rotary arm 42
Pitch in 1~m of side circle and pth~n circle between two spring rings of arbitrary neighborhood is set as δ1, m~p circle in any phase
It is the natural number and p > m between 1~n that pitch between adjacent two spring rings, which is set as δ, m and p, wherein δ1> δ, and δ1- δ=
0.3~0.5mm.
Embodiment 3
In the present embodiment 3, torsional spring 4 can be include the helical spring of 2 end arms or more, such as torsion spring structure, this pair is turned round
Spring includes three end arms and two spires, and wherein end arms includes intermediate end arms and both ends end arms, and two spires are respectively separated
It is arranged between intermediate end arms and both ends end arms, the end spiral shell that each spire respectively includes middle spiral portion again and is attached thereto
Rotation portion, wherein end convolution portion is connect with middle spiral portion and end arms respectively.
At this point, it is rotary arm that the intermediate end arms in three end arms of setting, which may be selected, both ends end arms is the static arm of force, or
Setting both ends end arms is rotary arm, and intermediate end arms is the static arm of force.
End interconnecting piece in the present embodiment 3 is an end spring circle connecting with end arms, is preferably Archimedes
The spring of helix shape, and the central diameter D for the end spring circle at least being connect with rotary armaGreater than the spring in middle spiral portion
The central diameter D of circle.
Certainly further, on the basis of above structure, the central diameter for the other end spring ring being connect with the static arm of force
DbIt may be alternatively provided as the central diameter D of the spring ring greater than middle spiral portion.And the central diameter D of the other end spring ringbIt can be set to
In the central diameter D of end spring circleaIt may be set to be not equal to Da
As interchangeable embodiment, the end convolution portion connecting with rotary arm can be set to cone-type spiral portion,
Middle spiral portion is cylindrical coil portion, and wherein cone-type spiral portion is connect with rotary arm and cylindrical coil portion respectively.Cone-type spiral
Portion is central diameter along the gradually smaller volute spring of spring ring compression direction, and cylindrical coil portion is cylindrical spring, wherein cylindrical coil
The central diameter of the spring ring in portion is less than or equal to the minimum central diameter of the spring ring in cone-type spiral portion.And taper as cone-type spiral portion
Spring preferably uses the spring of spiral of Archimedes shape.Certainly when there are two rotary arms, with two rotary arms
Two cone-type spiral portions of connection may be configured as identical symmetrically arranged volute spring, may be alternatively provided as different two of central diameter
Independent volute spring.It is further possible to which it is cone-type spiral that all end convolution portions connecting with all end arms, which are arranged,
Portion, middle spiral portion are cylindrical coil portion, and wherein cone-type spiral portion is connect with end arms and cylindrical coil portion respectively, cylindrical coil portion
Both ends connect respectively with two cone-type spiral portions.Cone-type spiral portion is central diameter along the gradually smaller taper of spring ring compression direction
Spring, cylindrical coil portion are cylindrical spring, and wherein the central diameter of the spring ring in cylindrical coil portion is less than or equal to the bullet in cone-type spiral portion
The minimum central diameter of spring coil.And the spring of spiral of Archimedes shape is preferably used as the volute spring in cone-type spiral portion.
Certainly wherein all cone-type spiral portion may be configured as identical volute spring (referring to the volute spring that central diameter and pitch are equal),
It may be alternatively provided as the different independent volute spring of central diameter (i.e. at least one different volute spring in central diameter and pitch).
Helical spring provided by the utility model, the central diameter due to will be close to first spring ring at rotary arm are arranged
Greater than the central diameter of 2~n coil spring circle, or central diameter will be set as along compression direction with the one of rotary arm junction section of spring
The volute spring being gradually reduced may make the helical spring after by external force rotary compression, and first spring ring will not be with the second bullet
Between spring coil contact or generate friction, thus can avoid the helical spring is generated at biggish first spring ring of stress break
It splits or fails.In addition, helical spring provided by the utility model, by will be close to first spring ring at rotary arm and
Gap setting between two spring rings is that or will be close to former circles at rotary arm greater than the gap between subsequent spring ring
Gap setting be set greater than the gap between subsequent spring ring, or by the gap between each spring ring of the helical spring
It is set to and is gradually reduced along forced compression direction, it thus can be made when working torsional deflection, enough gaps can be reserved and avoided
The normal transmitting of influence power, the i.e. helical spring of above structure, so that spring is during torsional deflection, spring ring and spring ring
Between will not because of gap reduction and increase friction, which thereby enhance the reliability of spring.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes among the protection scope created still in the utility model.
Claims (18)
1. a kind of helical spring comprising:
Spire, the spire include multiple spring rings, and the spire includes the middle spiral portion and end interconnected
Spire；
And at least two end arms, the end arms are connect with the end convolution portion respectively, the end arms includes at least one rotation
Turn the arm of force；
It is characterized by:
The central diameter of the spring ring in the end convolution portion at least connecting with the rotary arm is greater than the spring ring in middle spiral portion
Central diameter.
2. helical spring according to claim 1, it is characterised in that: the end arms is two, one of them is rotary force
Arm, another is the static arm of force, and the static state arm of force is connect with adjacent component static state, to described quiet after the rotary arm stress
Spire described in state arm of force rotary compression.
3. helical spring according to claim 2, it is characterised in that: the length of the rotary arm is greater than the static force
The length of arm.
4. helical spring according to claim 2, it is characterised in that: the end convolution portion is to connect with the end arms
One end spring circle, the middle spiral portion are cylindrical spring.
5. helical spring according to claim 4, it is characterised in that: another end bullet being connect with the static arm of force
The central diameter of spring coil is greater than the central diameter of the spring ring in the middle spiral portion.
6. helical spring according to claim 4, it is characterised in that: be attached at least to the end of the rotary arm
Pitch between spring ring and adjacent spring ring is greater than the pitch between the spring ring in the middle spiral portion.
7. helical spring according to claim 4, it is characterised in that: be connected to the end spring circle of two end arms with
Pitch between adjacent spring ring is respectively greater than the pitch between the spring ring in the middle spiral portion.
8. helical spring according to claim 2, it is characterised in that: the end at least being connect with the rotary arm
Spire is cone-type spiral portion, and the middle spiral portion is cylindrical coil portion, and the cone-type spiral portion is and the rotary arm
Connection and central diameter is along the gradually smaller volute spring of spring ring compression direction, the cylindrical coil portion be respectively with the taper spiral shell
The cylindrical spring that rotation portion is connected with the static arm of force, wherein the central diameter of the spring ring in cylindrical coil portion is less than or equal to the taper
The minimum central diameter of the spring ring of spire.
9. helical spring according to claim 8, it is characterised in that: the end convolution portion connecting with the static arm of force is
Another cone-type spiral portion, wherein another cone-type spiral portion is the cone being set between the cylindrical coil portion and the static arm of force
Shape spring, the central diameter in another cone-type spiral portion close to the spring ring of the static arm of force are greater than the bullet far from the static arm of force
The central diameter of spring coil, the minimum central diameter in another cone-type spiral portion are more than or equal in the spring ring in the cylindrical coil portion
Diameter.
10. helical spring according to claim 8, it is characterised in that: between the spring ring in at least described cone-type spiral portion
Pitch be greater than the cylindrical coil portion spring ring between pitch.
11. helical spring according to claim 10, it is characterised in that: the cone-type spiral portion, another taper spiral shell
Pitch between the spring ring in rotation portion is all larger than the pitch between the spring ring in the cylindrical coil portion.
12. helical spring according to claim 1, it is characterised in that: the end arms is two, and two end arms are
Rotary arm, two rotary arms are to end convolution portion described in the rotary compression of center.
13. helical spring according to claim 12, it is characterised in that: the end convolution portion be two respectively with it is described
One end spring circle of rotary arm connection, the central diameter of two end spring circles are all larger than the bullet in the middle spiral portion
The central diameter of spring coil.
14. helical spring according to claim 13, it is characterised in that: be connected to two institutes of two rotary arms
State the pitch that the pitch between end spring circle and adjacent spring ring is all larger than between the spring ring in the middle spiral portion.
15. helical spring according to claim 12, it is characterised in that: two end convolution portions are cone-type spiral
Portion, the middle spiral portion are cylindrical coil portion, the cone-type spiral portion be connect respectively with two rotary arms and in
Diameter along the gradually smaller volute spring of spring ring compression direction, the cylindrical coil portion be both ends respectively with two taper spiral shells
The cylindrical spring of rotation portion connection, wherein the central diameter of the spring ring in cylindrical coil portion is less than or equal to the spring ring in the cone-type spiral portion
Minimum central diameter.
16. helical spring according to claim 15, it is characterised in that: the section between the spring ring in the cone-type spiral portion
Away from the pitch between the spring ring for being greater than the cylindrical coil portion.
17. the helical spring according to claim 2 or 12, it is characterised in that: the wherein any one or more ends
Spire is set as spiral of Archimedes spring.
18. a kind of cooking appliance comprising: lid and ontology, the ontology and the lid are articulated and connected；
It is characterized by:
Wherein it is socketed with one described in above-mentioned any one claim on the ontology and the articulated shaft of the lid junction
A or multiple helical springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721426966.7U CN208388408U (en) | 2017-10-31 | 2017-10-31 | Coil spring and cooking utensil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721426966.7U CN208388408U (en) | 2017-10-31 | 2017-10-31 | Coil spring and cooking utensil |
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| Publication Number | Publication Date |
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| CN208388408U true CN208388408U (en) | 2019-01-18 |
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ID=65065593
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| CN (1) | CN208388408U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107713730A (en) * | 2017-10-31 | 2018-02-23 | 珠海格力电器股份有限公司 | Coil spring and cooking utensil |
-
2017
- 2017-10-31 CN CN201721426966.7U patent/CN208388408U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107713730A (en) * | 2017-10-31 | 2018-02-23 | 珠海格力电器股份有限公司 | Coil spring and cooking utensil |
| CN107713730B (en) * | 2017-10-31 | 2022-08-30 | 珠海格力电器股份有限公司 | Coil spring and cooking utensil |
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