CN201651141U - Steel plate spring - Google Patents
Steel plate spring Download PDFInfo
- Publication number
- CN201651141U CN201651141U CN2010201417298U CN201020141729U CN201651141U CN 201651141 U CN201651141 U CN 201651141U CN 2010201417298 U CN2010201417298 U CN 2010201417298U CN 201020141729 U CN201020141729 U CN 201020141729U CN 201651141 U CN201651141 U CN 201651141U
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Abstract
The utility model provides a steel plate spring. The steel plate spring comprises a plurality of spring pieces, wherein both ends of a first spring piece are bent into spring eyes; the first spring piece is provided with a middle part and both end parts; and the thickness of the middle part is less than that of the both end parts. The thickness of the middle part of the first spring piece is relatively small to lead rigidity to be relatively small and toughness to be stronger, so that the first spring piece is easy to break under the action of an external force, and meanwhile, the both end parts of the first spring piece are mainly acted by a tensile force and the thickness of the both end parts on which the spring eyes are formed is relatively large to lead the rigidity to be larger so as to improve the strength of the spring eyes. The structure that the middle part is thin and both ends are thick of the first spring piece can improve service life of the first spring piece so as to reduce maintenance man-hour of the steel plate spring, guarantee driving safety and also basically not increase the overall weight of the steel plate spring.
Description
Technical field
The utility model relates to a kind of leaf spring that is used for the truck suspension system.
Background technique
Along with the continuous development of truck industry, the carrying capacity of truck improves constantly, and is meanwhile, also more and more higher to the requirement of its smoothness that travels and Security.The weight of truck body mainly relies on the elastic element in the suspension system to support, the function of elastic element is to make between vehicle frame and the vehicle bridge to get in touch as elasticity, bears and transmit normal load, relaxes and the caused impact of inhibition uneven road surface.
Leaf spring is most widely used a kind of elastic element in the automotive suspension, it is wide but not isometric (thickness can equate by some, also can be unequal) the alloy spring sheet, constitute a suite rate radius tangent isocentric circular arc all different, form an approximate equicohesive elastic beam with arc length.When leaf spring is installed in the automotive suspension, when the normal load of being born was forward, each spring sheet is stress deformation all, the trend that oriented arch is curved.At this moment, vehicle bridge and vehicle frame are just close mutually.When vehicle bridge and vehicle frame mutually away from the time, forward normal load that leaf spring is suffered and distortion just reduce gradually, sometimes even can be oppositely.First spring sheet in the leaf spring (also being the longest a slice) is a main leaf, and its two ends curve grasswort, and interior dress lining is so that be connected as hinge with support or hanger on being fixed on vehicle frame with spring pin.The grasswort of first spring sheet (main leaf) is stressed serious, is weakness, and for improving the stressing conditions of the first spring sheet grasswort, often the end with second spring sheet also curves grasswort, wraps in the outside of the first spring sheet grasswort, is called the bag ear.Centre bolt is in order to connecting each spring sheet, and the relative position of each spring sheet when guaranteeing assembling.Except that centre bolt, also have several spring clips (also recalling cartridge clip) that each spring sheet is linked together, to guarantee when leaf spring reversal deformation (knock-on), each spring sheet is unlikely separated from each other, in order to avoid first spring sheet carries separately, in addition, can prevent that also each spring sheet is in laterally (being the spring sheet width direction) changing of the relative positions.
At present, heavy-duty car on the market generally adopts the laminated leaf-spring structure, and this leaf spring generally is made up of 9～14 flat spring sheets, each spring sheet radius of curvature difference, each spring sheet tightly forces together after compression fit, and all spring sheet participates in carrying in the course of the work.No matter under which kind of load condition, work leaf spring stiffness variation little (not considering to rub between sheet).By the calculation method of suspension system frequency as can be known, this frequency and spring carried mass are inversely proportional to, and are directly proportional with leaf spring rigidity.Therefore the spring carried mass of above-mentioned existing leaf spring is the principal element of decision suspension frequency, so the big more vehicle suspension frequency range of lifting capacity is big more, under certain load behavior, cause easily suspension frequency and other certain
The stack of one system frequency, thus the resonance of car load driving system caused, influence the smoothness and the Security of vehicle.
In addition, first spring sheet (being main leaf) is positioned at the top of leaf spring, and its two ends have grasswort, and by this grasswort whole leaf spring are installed on the vehicle frame, and therefore the load of bearing is bigger, damages easily.In case first spring sheet damages, then whole leaf spring all will remove from automobile, change then, so complex operation, waste time and energy.
The model utility content
Technical problem to be solved in the utility model provides a kind of leaf spring, and it can improve the working life of first spring sheet, and can not increase the overall weight of leaf spring basically.
For solving the problems of the technologies described above, the utility model provides a kind of leaf spring, this leaf spring comprises a plurality of spring sheets, wherein the two ends of first spring sheet curve grasswort, it is characterized in that: described first spring sheet has intermediate portion and two end portions, and the thickness of described intermediate portion is less than the thickness of described two end portions.
By adopting technique scheme, because the intermediate portion of described first spring sheet mainly occurs bending and deformation when being subjected to external load, so the less relatively rigidity that just causes of the thickness of intermediate portion is less relatively, and toughness is stronger, to make the time spent plastic deformation limit bigger being subjected to external force, so be not easy fracture; Simultaneously, the two end portions of described first spring sheet mainly is subjected to tension, and the thickness of the two end portions of formation grasswort is relatively large, thereby rigidity is bigger, and the ability of resistance to deformation is strong, has therefore improved grasswort intensity.The thick structure in this intermediate thin two ends of described first spring sheet can improve the working life of first spring sheet, thereby reduce the maintenance man-hours of leaf spring, guarantees traffic safety, can not increase the overall weight of leaf spring simultaneously basically.
Description of drawings
Describe preferred implementation of the present utility model in detail below in conjunction with accompanying drawing, by describing in detail, above-mentioned and other purpose, feature and advantage of the present utility model will be tangible:
Fig. 1 is the leaf spring plan view of the utility model mode of execution;
Fig. 2 is the view of the magnification ratio of circle part among Fig. 1.
Description of reference numerals:
1. first cluster spring
2. second cluster spring
3. the 3rd cluster spring
4. centre bolt
5. first spring sheet
6. grasswort
7. bag ear
8. spring clip
9. gap
10. intermediate portion
11. transition portion
12. two end portions
Embodiment
Be described in detail below in conjunction with the leaf spring of accompanying drawing the utility model mode of execution.
As shown in Figure 1, leaf spring of the present utility model mainly comprises a plurality of spring sheets, centre bolt 4, spring clip 8, grasswort 6 and Bao Er 7.First spring sheet, 5 two ends curve described grasswort 6, the second spring sheet ends and curve described bag ear 7, wrap in the outside of described grasswort 6.The distance at described centre bolt 4 center of described grasswort 6 apart from two ends equates, is the symmetry axis of leaf spring integral body.
Wherein, described first spring sheet 5 comprises intermediate portion 10 and two end portions 12, and as shown in Figure 2, the thickness of described intermediate portion 10 is less than the thickness of described two end portions 12.Can be formed with transition portion 11 between described intermediate portion 10 and described two end portions 12, the thickness of described transition portion 11 increases to two end portions gradually from described intermediate portion.Be uniformly under the thickness preferable case of described intermediate portion 10 or described two end portions 12, but the utility model is not limited thereto.Grasswort 6 is positioned at the outside of first spring sheet, 5 two end portions 12.The two end portions 12 of first spring sheet 5 can link together by the two ends of at least one spring sheet of spring clip 8 below it, and for example shown in Fig. 1, the two end portions 12 of first spring sheet 5 is clamped together by 4 spring sheets of spring clip 8 below it.
Except described first spring sheet 5, the thickness of other spring sheets is also preferably uniform.When the thickness of the thinnest in the thickness of the intermediate portion 10 of described first spring sheet 5 and other a spring sheets spring sheet equated, the thickness of the two end portions 12 of described first spring sheet 5 will be greater than the thickness of this spring sheet; When the thickness of the thickness of the intermediate portion 10 of described first spring sheet 5 a thinnest spring sheet in less than other spring sheets, the thickness of the two end portions 12 of described first spring sheet 5 is more than or equal to the thickness of this spring sheet.
Pass through said structure, because the thickness of the intermediate portion 10 of first spring sheet 5 is less than or equal to the thickness of the thinnest in other a spring sheets spring sheet, so when leaf spring occurs bending and deformation, the toughness of the intermediate portion 10 of first spring sheet 5 is the strongest, to make the time spent plastic deformation limit bigger being subjected to external force, so be not easy fracture; And the thickness of the two end portions 12 of described first spring sheet 5 is more than or equal to the thickness of the thinnest in other a spring sheets spring sheet, and the two end portions of described first spring sheet mainly is subjected to tension, so the thickness of the two end portions of formation grasswort is relatively large, therefore rigidity is bigger, the ability of resistance to deformation is strong, grasswort intensity height.
According to of the present utility model preferred embodiment a kind of, leaf spring can also comprise a plurality of cluster spring, and each cluster spring all comprises a plurality of spring sheets that are superimposed.
Wherein, each spring sheet is the radius of curvature tangent isocentric circular arc all different with arc length in the identical springs group, so each spring sheet closely is superimposed in the identical springs group, and spring sheet is the radius of curvature inscribe circular arc all different with arc length between the different cluster spring, so all spring sheet closely connects by described centre bolt 4 at the symmetry axis place, then exists owing to the different gaps that cause 9 with camber of radius of curvature at the circular arc two ends between the different cluster spring.
According to preferred embodiment a kind of, in first cluster spring 1 at described first spring sheet 5 places, except described first spring sheet 5, the thickness of other spring sheets is even and equal.Other each cluster spring below being arranged in described first cluster spring 1, the thickness of each spring sheet evenly equates in each cluster spring.Each following cluster spring of second cluster spring is hit by a bullet the thickness of reed greater than the be hit by a bullet thickness of reed of a last cluster spring of this cluster spring.Second cluster spring be hit by a bullet reed thickness greater than in first cluster spring except that first spring sheet thickness of all the other spring sheets.
Because the sectional area of the rigidity and spring sheet self of spring sheet is relevant, therefore this design of respectively organizing the spring sheet different-thickness makes the rigidity difference of respectively organizing spring sheet self, thereby controls range in stiffness when respectively organizing spring sheet and working alone or in combination by the thickness that spring sheet is respectively organized in control.
Under the preferable case, in other spring sheets except that first spring sheet, spring sheet in first cluster spring is the thinnest, therefore when the thickness of the intermediate portion 10 of described first spring sheet 5 equated with the thickness of other spring sheets in described first cluster spring 1, the thickness certainty of the two end portions 12 of described first spring sheet 5 was greater than the thickness of other spring sheets in described first cluster spring 1; When the thickness of the intermediate portion 10 of described first spring sheet 5 less than described first cluster spring 1 in during the thickness of other spring sheets, the thickness of the two end portions 12 of described first spring sheet 5 is more than or equal to the thickness of other spring sheets in described first cluster spring 1.
In this preferred implementation, when the automobile unloaded state moves, has only the first cluster spring work, when carrying capacity increases gradually, because the effect of bearing capacity, the area of contact of first, second cluster spring circular arc camber increases gradually, inter-stage gap between adjacent two cluster spring is closed gradually, thus the increase of leaf spring integral rigidity, by that analogy, continuous increase along with carrying capacity, the cluster spring of participation work increases gradually, and when heavy condition, it is maximum that bearing capacity reaches, all cluster spring participation work this moment, leaf spring integral rigidity also reach maximum.Like this, keep the relatively stable of each load behavior lower suspension system frequency by changing leaf spring rigidity, thereby improve the smoothness of automobile running.
Only the preferred embodiment of the leaf spring preferred implementation by three cluster spring comes the utility model is described in detail below.Need to prove at this; increase or reduce the quantity of number of packet and each group spring sheet of described leaf spring spring sheet; perhaps increase or reduce length, width and the thickness equidimension etc. of a spring sheet in the leaf spring; all be the simple deformation within the utility model technical conceive scope, all belong to the protection domain of the utility model claims.
Have 13 flat spring sheets in this preferred embodiment, wherein first cluster spring 1 has 6 spring sheets, each spring sheet thickness 11mm, wherein the thickness of the intermediate portion 10 of first spring sheet 5 is 11mm, the thickness of two end portions 12 is 16mm, and second cluster spring 2 has 3 spring sheets, and each spring sheet thickness is 13mm, the 3rd cluster spring 3 has 4 spring sheets, and each spring sheet thickness is 22mm.When the length (being that leaf spring is in the distance between the two grasswort centers under the straightened condition) of leaf spring is 1650mm, when width is 90mm, rigidity in the time of can calculating first cluster spring and work independently is 120 ± 12N/mm, rigidity when first cluster spring and the second cluster spring co-operation is 210 ± 21N/mm, and rigidity during three groups of cluster spring co-operation (assembly rigidity) is 550 ± 55N/mm.
Because the sectional area of the rigidity and spring sheet self of spring sheet is relevant, therefore can calculate the range in stiffness of respectively organizing spring sheet by the physical dimension and material self parameter of spring sheet.This design of respectively organizing the spring sheet different-thickness makes the rigidity difference of respectively organizing spring sheet self, thereby controls range in stiffness when respectively organizing spring sheet and working alone or in combination by the thickness that spring sheet is respectively organized in control, to adapt to the needs that vehicle capacity changes.
In this preferred embodiment, when the automobile unloaded state, have only 1 work of described first cluster spring, the integral rigidity of leaf spring is the rigidity of first cluster spring; When carload lot increases gradually, more preferably, when the standard load condition, because bearing capacity increases, area of contact between described first and second cluster spring 2 and 3 increases gradually, described gap 9 reduces gradually, and participate in work simultaneously by first, second cluster spring, the integral rigidity when rigidity is worked greater than first cluster spring this moment; When the automobile heavy condition, bearing capacity further increases, and the area of contact between the second and the 3rd cluster spring also increases gradually, and the gap reduces gradually, all spring sheet participation work this moment, the rigidity when rigidity is worked simultaneously greater than the one the second cluster spring.Known ground, suspension system frequency and spring carried mass are inversely proportional to, be directly proportional with the rigidity of leaf spring, therefore spring carried mass increases along with the increase of carload lot, the integral rigidity of leaf spring is also increasing simultaneously, so the suspension system frequency can metastablely remain in the less wave range, improve run smoothness.
Preferred implementation of the present utility model has more than been described, but the utility model is not limited to some concrete structures of showing among above-mentioned mode of execution and the width of cloth figure, those skilled in the art is in technical conceive scope of the present utility model, can make various deformation, such as the number of packet that changes leaf spring, change and respectively to organize leaf spring the be hit by a bullet shape and the quantity of reed, the quantity of the spring sheet of change spring clip clamping and holding position etc., these simple deformation modes all belong to scope of the present utility model.
Claims (10)
1. leaf spring, this leaf spring comprises a plurality of spring sheets, wherein the two ends of first spring sheet (5) curve grasswort (6), it is characterized in that: described first spring sheet (5) comprises intermediate portion (10) and two end portions (12), and the thickness of described intermediate portion (10) is less than the thickness of described two end portions (12).
2. leaf spring according to claim 1, it is characterized in that: described first spring sheet (5) also comprises the transition portion (11) that is positioned between described intermediate portion (10) and the two end portions (12), and the thickness of described transition portion (11) increases to two end portions (12) gradually from described intermediate portion (10).
3. leaf spring according to claim 1 and 2 is characterized in that: the thickness of described intermediate portion (10) is even, and/or the thickness of described two end portions (12) is even.
4. leaf spring according to claim 1 is characterized in that: described leaf spring comprises a plurality of cluster spring, and each cluster spring all comprises a plurality of spring sheets that are superimposed, and has the gap between the two ends of adjacent springs group.
5. leaf spring according to claim 4 is characterized in that: in first cluster spring (1) at described first spring sheet (5) place, except described first spring sheet (5), the thickness of other spring sheets is even and equal.
6. leaf spring according to claim 5 is characterized in that: the thickness of the intermediate portion (10) of described first spring sheet (5) equates with the thickness of other spring sheets in described first cluster spring (1).
7. leaf spring according to claim 5, it is characterized in that: the thickness of the intermediate portion of described first spring sheet (10) is less than the thickness of other spring sheets in described first cluster spring (1), and the thickness of the two end portions (12) of described first spring sheet (5) is greater than the thickness of other spring sheets in described first cluster spring (1).
8. leaf spring according to claim 5, it is characterized in that: the thickness of the intermediate portion (10) of described first spring sheet (5) is less than the thickness of other spring sheets in described first cluster spring (1), and the thickness of the two end portions of described first spring sheet (12) equals the thickness of other spring sheets in described first cluster spring (1).
9. leaf spring according to claim 5, it is characterized in that: other each cluster spring below being arranged in described first cluster spring (1), the thickness of each spring sheet evenly equates in each cluster spring, and each cluster spring is hit by a bullet the thickness of reed greater than the be hit by a bullet thickness of reed of a last cluster spring of this cluster spring.
10. leaf spring according to claim 4, it is characterized in that: in first cluster spring (1) at described first spring sheet (5) place, the two end portions (12) of described first spring sheet (5) links together by the two ends of at least one spring sheet of spring clip (8) below it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201417298U CN201651141U (en) | 2010-03-23 | 2010-03-23 | Steel plate spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201417298U CN201651141U (en) | 2010-03-23 | 2010-03-23 | Steel plate spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201651141U true CN201651141U (en) | 2010-11-24 |
Family
ID=43116377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201417298U Expired - Fee Related CN201651141U (en) | 2010-03-23 | 2010-03-23 | Steel plate spring |
Country Status (1)
| Country | Link |
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| CN (1) | CN201651141U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518723A (en) * | 2011-12-06 | 2012-06-27 | 重庆红岩方大汽车悬架有限公司 | Steel plate spring |
| CN102937156A (en) * | 2012-11-27 | 2013-02-20 | 东风柳州汽车有限公司 | Plate spring component of heavy-duty truck |
| CN103129342A (en) * | 2011-11-21 | 2013-06-05 | 赵文志 | Comprehensive improved device of vehicle |
| CN103950362A (en) * | 2014-04-29 | 2014-07-30 | 湖北鄂钢驰久钢板弹簧有限公司 | Steel plate spring |
| CN105711364A (en) * | 2016-02-03 | 2016-06-29 | 中国重汽集团济南动力有限公司 | Front suspension device of double-front-shaft towing vehicle |
| CN106763391A (en) * | 2017-01-12 | 2017-05-31 | 王炳超 | The method for designing in the offset frequency type progressive rate leaf spring gradual change gap such as the main spring formula of two-stage is non- |
| CN110247132B (en) * | 2019-06-12 | 2021-04-27 | 安徽江淮松芝空调有限公司 | Power battery direct cooling system with plate spring |
-
2010
- 2010-03-23 CN CN2010201417298U patent/CN201651141U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103129342A (en) * | 2011-11-21 | 2013-06-05 | 赵文志 | Comprehensive improved device of vehicle |
| CN102518723A (en) * | 2011-12-06 | 2012-06-27 | 重庆红岩方大汽车悬架有限公司 | Steel plate spring |
| CN102937156A (en) * | 2012-11-27 | 2013-02-20 | 东风柳州汽车有限公司 | Plate spring component of heavy-duty truck |
| CN103950362A (en) * | 2014-04-29 | 2014-07-30 | 湖北鄂钢驰久钢板弹簧有限公司 | Steel plate spring |
| CN105711364A (en) * | 2016-02-03 | 2016-06-29 | 中国重汽集团济南动力有限公司 | Front suspension device of double-front-shaft towing vehicle |
| CN106763391A (en) * | 2017-01-12 | 2017-05-31 | 王炳超 | The method for designing in the offset frequency type progressive rate leaf spring gradual change gap such as the main spring formula of two-stage is non- |
| CN106763391B (en) * | 2017-01-12 | 2019-01-15 | 山东恒日悬架弹簧有限公司 | The design method in the offset frequencys type progressive rate leaf spring gradual change gaps such as the main spring formula of two-stage is non- |
| CN110247132B (en) * | 2019-06-12 | 2021-04-27 | 安徽江淮松芝空调有限公司 | Power battery direct cooling system with plate spring |
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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: 20101124 Termination date: 20180323 |