CN102535857B - Box beam, arm support, outrigger and engineering machine - Google Patents
Box beam, arm support, outrigger and engineering machine Download PDFInfo
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- CN102535857B CN102535857B CN201210076194.4A CN201210076194A CN102535857B CN 102535857 B CN102535857 B CN 102535857B CN 201210076194 A CN201210076194 A CN 201210076194A CN 102535857 B CN102535857 B CN 102535857B
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- 239000002131 composite material Substances 0.000 claims abstract description 145
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 238000003825 pressing Methods 0.000 claims description 27
- 239000000853 adhesive Substances 0.000 claims description 10
- 230000001070 adhesive effect Effects 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 description 24
- 238000000034 method Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 10
- 238000003466 welding Methods 0.000 description 9
- 238000004026 adhesive bonding Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention provides a box beam. The box beam has a box structure defined by a plurality of plates, wherein a composite plate is at least arranged on the tension side of the box beam. According to the box beam, the mechanical property of a cross section of the box beam under the cantilever condition is fully utilized, and the composite plate is at least arranged on the tension side of the box beam; compared with the prior art that the composite plate is adhered on the outer surface of a steel plate, the box beam has essential differences, the steel plate of the original box beam is removed, the tension acting force of the box beam is completely born by the composite plate, and the characteristic of high tension intensity of the composite plate is fully exerted, so that the integral intensity of the box beam is improved; and the composite plate instead of the steel plate is arranged on the tension side of the box beam, so that the weight of the box beam can be greatly reduced while the bearing property and the loaded property of the box beam are improved. The invention also provides an arm support, an outrigger and an engineering machine which comprises the arm support and/or the outrigger.
Description
Technical field
The present invention relates to engineering machinery field, the jib, the supporting leg that more specifically, relate to a kind of box-girder, adopt this box-girder to make, and comprise the engineering machinery of above-mentioned jib and/or supporting leg.
Background technology
The jib of concrete mixer belongs to box girder structure, needs level to overhang during operation, and under this cantilever working condition, box-girder will bear huge moment of flexure, bears huge pulling force on the neutral line of wherein box-girder.Therefore, need adopt comparatively heavy-gauge sheeting to bear tensile stress, to ensure the strength and stiffness of jib.So the sheet material of existing jib is general thicker, not only increases jib weight, reduce the flexibility of jib action, also waste material, add manufacture difficulty.In addition, jib own wt constitute a further jib load, will certainly the general arrangement of restricted arm frame system compared with heavy-gauge sheeting jib structure, increases design difficulty; If jib gross weight is excessive even can affect the global design that concrete mixer etc. has jib machinery, seriously constrain the development of overlength jib technology.In addition, supporting leg for the engineering machinery such as concrete pump, crane also adopts box girder structure, need down complete machine to support in working order, box-girder needs thus bears larger moment of flexure, bears huge pulling force under the neutral line of wherein box-girder.
In prior art, above-mentioned box-girder generally adopts four block plates to be welded.As shown in Figure 1, be a kind of cross section structure schematic diagram of box-girder provided in correlation technique, this box-girder can be used in the jib of concrete mixer, and this box-girder comprises four block plates and surrounds box structure.In order to improve load-carrying properties and the stress performance of box-girder, being fixedly installed composite panel at the top board of box-girder, the external surface of base plate, utilizing the high-intensity performance of this composite panel to improve load-carrying properties and the stress performance of jib; On the other hand, when ensureing jib load-carrying properties and stress performance, the thickness of sheet material can be reduced, thus reduce the weight of whole jib.In technique scheme, at the external surface of steel plate, composite material is set, composite material only strengthens structure as auxiliary, the high-intensity performance of composite panel is not not fully exerted, and the weight of steel plate still occupies larger proportion in whole jib load, larger room for improvement is still existed to the light-weight design of jib.
Summary of the invention
First object of the present invention is to propose a kind of box-girder, and this box-girder has given full play to the high-intensity performance of composite material, improves the intensity of box-girder, significantly alleviates the weight of box-girder.Second object of the present invention is to propose a kind of jib, a kind of supporting leg, adopts above-mentioned box-girder to make.The invention allows for a kind of engineering machinery applying above-mentioned jib and/or supporting leg.
In order to realize first object of the present invention, the invention provides a kind of box-girder, surrounding box structure by multi-sheets, the sheet material of the tension side of at least described box-girder is composite panel.In the technical scheme that the present invention proposes, at least the sheet material of the tension side of box-girder adopts composite panel, with in prior art, composite panel is pasted onto steel plate external surface have essence difference, eliminate the steel plate of original box-girder, born the tension active force of box-girder completely by composite panel, give full play to the high-intensity performance of composite panel; Adopt composite panel to substitute the steel plate of box-girder tension side, while the load-carrying properties improving box-girder and stress performance, greatly can alleviate the weight of box-girder.
In technique scheme, preferably, described box-girder is surrounded by top board, base plate and two side plates, and described top board and/or described base plate are flat composite panel, and other are steel plate.In actual application, top board and/or base plate are bearing by pulling force maximum position in box-girder, so, the top board of box-girder and/or base plate are adopted composite panel, the high feature of composite panel tensile strength can be played to greatest extent, thus improve the bulk strength of box-girder.
In technique scheme, preferably, the end of two described side plates is equipped with the first junction plate, and described composite panel is fixedly connected with by adhesive means and/or mechanical connection manner with described first junction plate.According to the force analysis of box-girder, the thinner thickness of two side plates in box-girder in the design process, side plate does not have enough installing spaces to be fixedly connected with composite panel, therefore have employed and the first junction plate is set in side end, composite panel is fixedly connected with the first junction plate, which increases the contact area of side plate and composite panel, can be light, realize being fixedly connected with of composite panel and biside plate securely, the above-mentioned mode be fixedly connected with can be gluing connection, also can be mechanical connection manner, it can also be combination that is gluing and mechanical connection.
In technique scheme, preferably, the end of two described side plates to the inside and/or outside extend to form described first junction plate.First junction plate be by side plate to the inside and/or outside extend form, first junction plate and side plate are steel plate, welding steel on side plate can be avoided like this using the form of structure as the first junction plate, to simplify the mounting structure of box-girder, and avoid being welded to connect means in box-girder.Certainly, also can at the inner side of side plate and/or outside welding steel using as the first junction plate in the present invention.
In technique scheme, preferably, described composite panel and the mechanical connection manner of described first junction plate are that bolt is connected.By bolt through composite panel and the first junction plate, composite panel and two side plates are fixed up; Glue-line can also be scribbled between composite panel and the first junction plate, improve further between the two be fixedly connected with performance.Adopt bolt to be fixedly connected with mode, bolted good stability, the bonding strength between composite panel and the first junction plate can be ensured, and this connected mode installing/dismounting is easy to operate, is convenient to the regular maintenance of box-girder.
In technique scheme, preferably, the opposite side being positioned at described first junction plate at described composite panel also arranges pressing plate, and described composite panel is clipped in described pressing plate and described first in the middle of junction plate and is bolted to connection.In this technical scheme, pressing plate, be steel plate from outward extending first junction plate of side plate, composite panel is clipped in the middle of pressing plate and the first junction plate, when box-girder bearing load, the face way of contact is always between three, composite panel is tightly fixed on centre, the point cantact that the first junction plate and/or composite panel occur distortion and formed at bolt link position can be avoided, thus improve connective stability and the reliability of composite panel and side plate; On the other hand, the opposite side being positioned at the first junction plate at composite panel also arranges pressing plate, increase the contact area of the first junction plate and composite panel, and kept by pressing plate, when composite panel bears pulling force, the link position between composite material and the first junction plate can be avoided to occur phenomenons such as ftractureing, pull, thus improve load-carrying properties and the stress performance of composite panel further.
In another kind of box-girder provided by the invention, described box-girder is surrounded by top board, base plate and two side plates, and described top board is cross section is inverted U-shaped composite panel, and described base plate and two side plates are steel plate.Because box-girder is semi girder down in working order, there is a neutral line in box-girder depth of section direction, pulling force is born on the top of neutral line, and pulling force is upwards increased gradually by neutral line; Pressure is born in the bottom of neutral line, and pressure is increased downwards gradually by neutral line.Part in compression more than box-girder neutral line can be adopted composite panel by the technical program, can give full play to the tensile property of composite material, and steel plate is in pressurized zone simultaneously, can play the compressive property that it is very strong.
In technique scheme, preferably, the inner side of described composite panel dual-side is fixedly connected with by adhesive means with the outside of two described side plates respectively.
In technique scheme, preferably, the end of two described side plates is equipped with the first junction plate, and the end of described composite panel dual-side is equipped with the second junction plate, and described first junction plate is fixedly connected with by adhesive means and/or mechanical connection manner with described second junction plate.
In technique scheme, preferably, the end of two described side plates to the inside and/or outside extend to form described first junction plate, the end of the dual-side of described composite panel to the inside and/or outside extend to form described second junction plate.In actual application, can also at the welding edges steel plate of side plate to be connected as the first junction plate with composite panel.
In technique scheme, preferably, described first junction plate and the mechanical connection manner of described second junction plate are that bolt is connected.
In technique scheme, preferably, the opposite side being positioned at described first junction plate at described second junction plate also arranges pressing plate, and described second junction plate is clipped in described pressing plate and described first in the middle of junction plate and is bolted to connection.In this technical scheme, pressing plate, be steel plate from outward extending first junction plate of side plate, be clipped in the middle of pressing plate and the first junction plate from outward extending second junction plate of composite panel, when box-girder bearing load, the face way of contact is always between three, second junction plate is tightly fixed on centre, the point cantact that composite connection board and/or side plate occur distortion and formed at bolt link position can be avoided, thus improve connective stability and the reliability of composite panel and side plate; On the other hand, the opposite side being positioned at the first junction plate at the second junction plate arranges pressing plate, increase the contact area of the first junction plate and the second junction plate, and kept by pressing plate, when composite panel bears pulling force, the link position between the second junction plate and the first junction plate can be avoided to occur phenomenons such as ftractureing, pull, thus improve load-carrying properties and the stress performance of composite panel further.
In technique scheme, preferably, described composite panel is carbon fibre composite plate.
Present invention also offers a kind of jib, comprise the joint arm that more piece is hinged successively, at least one joint described joint arm adopts above-mentioned box-girder to make.
Present invention also offers a kind of supporting leg, comprise outrigger arm and the supporting leg being located at its end, described outrigger arm adopts above-mentioned box-girder to make.
Present invention also offers a kind of engineering machinery, adopt above-mentioned jib and/or supporting leg.
Technical scheme provided by the invention has following beneficial effect:
The present invention proposes a kind of box-girder, take full advantage of the cross section mechanical property of box-girder in cantilever situation, at least adopt composite panel at the tension side of box-girder.The difference of essence is had relative to composite panel being pasted onto in prior art steel plate external surface, eliminate the steel plate of original box-girder, and the tension active force of box-girder is born completely by composite panel, give full play to the feature that composite panel tensile strength is high, thus improve the bulk strength of box-girder; Adopt composite panel to substitute the steel plate of box-girder tension side, while the load-carrying properties improving box-girder and stress performance, greatly can alleviate the weight of box-girder.
Accompanying drawing explanation
Fig. 1 is the cross section structure schematic diagram of a kind of box-girder in correlation technique;
Fig. 2 is the cross section structure schematic diagram of a kind of box-girder in first embodiment of the invention;
Fig. 3 is the cross section structure schematic diagram of a kind of box-girder in second embodiment of the invention;
Fig. 4 is the cross section structure schematic diagram of a kind of box-girder in third embodiment of the invention;
Fig. 5 is the cross section structure schematic diagram of a kind of box-girder in fourth embodiment of the invention;
Fig. 6 is the cross section structure schematic diagram of a kind of box-girder in fifth embodiment of the invention;
Fig. 7 is the cross section structure schematic diagram of a kind of box-girder in sixth embodiment of the invention.
Detailed description of the invention
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with drawings and Examples, the present invention will be further described.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from other modes described here and implement, and therefore, the present invention is not limited to the restriction of following public specific embodiment.
Based on prior art, in engineering machinery field, the jib of concrete mixer belongs to box-shaped cantilever beam structures, jib level is descended to overhang in working order, this box girder structure will bear huge moment of flexure, and be semi girder, box-girder depth of section direction exists formation one neutral line, the top of neutral line needs to bear huge pulling force, and pulling force is upwards increased gradually by neutral line; The bottom of neutral line needs to bear pressure, and pressure is increased downwards gradually by neutral line.
In order to realize object of the present invention, according to the cross section mechanical property of box-girder in cantilever situation, the present invention proposes a kind of box-girder, surrounding box structure by multi-sheets, at least adopt composite panel at the tension side of box-girder; This box-girder has given full play to the high feature of composite panel tensile strength, thus improves the bulk strength of box-girder; Adopt composite panel to substitute the steel plate of box-girder tension side, while the load-carrying properties improving box-girder and stress performance, greatly can alleviate the weight of box-girder.
Below by specific embodiment, the structure of box-girder in the present invention is described in detail.
As shown in Figures 2 and 3, a kind of first embodiment of box-girder, the cross section structure schematic diagram of the second embodiment that the present invention proposes is respectively.In this embodiment, composite material is plate-like structure.
With reference to accompanying drawing, the invention provides a kind of box-girder, this box-girder is surrounded by top board 10, base plate 20 and left plate 30 and right plate 40, and wherein, top board 10 is flat composite panel, and base plate 20, left plate 30 and right plate 40 are steel plate.
In this specific embodiment, according to the cross section mechanical property of box-girder in cantilever situation, top board 10 is positioned at the topmost of neutral line, therefore the pulling force that top board 10 bears should be maximum, therefore, in order to improve load-carrying properties and the stress performance of whole box-girder, need to improve the tensile property of top board 10.On this basis, composite panel is adopted to substitute steel plate of the prior art on the top board 10 of box-girder.This box girder structure, with in prior art, composite panel is pasted onto steel plate external surface have essence difference, eliminate the steel plate of original box-girder, the lower complete tension active force being born box-girder by composite panel, has given full play to the high-intensity performance of composite panel in working order; And substitute steel plate by composite material, the weight ratio steel plate of composite material much lightweight, guaranteeing box-girder load-carrying properties and accept performance prerequisite under, significantly alleviate the weight of box-girder.
According to the mounting means of box-girder, also can bear pulling force by the base plate of box-girder, such as, be applied in the supporting leg in engineering machinery, the base plate of supporting leg is descended to bear pulling force in working order, now, the base plate 20 of box-girder is adopted flat composite panel, too just there is above-mentioned technique effect.
It should be noted that, in actual application, when box-girder has multiple operating attitude, under a kind of operating attitude, the top board 10 of box-girder carries pulling force, and under another kind of operating attitude, the base plate 20 of box-girder carries pulling force.Such as, concrete mixer is when cloth, and jib can do rotation and the upset of multi-angle, and therefore, corresponding change also occurs the advancing side of jib, and namely the top board 10 of box-girder and base plate 20 bear pulling force under different operating attitudes.In order to adapt to this loading characteristic, all can adopt composite panel at the top board 10 of box-girder and base plate 20, thus making box-girder meet this application demand.
On said structure basis, can limit further the connected mode of composite panel in box-girder and side plate.Concrete, be equipped with the first junction plate 5 in the end of left plate 30 and right plate 40, composite panel is fixedly connected with by adhesive means and/or mechanical connection manner with the first junction plate 5.
According to the force analysis of box-girder, the thinner thickness of two side plates in box-girder in the design process, side plate does not have enough installing spaces to be fixedly connected with composite panel, therefore have employed and the first junction plate 5 is set in side end, composite panel is fixedly connected with the first junction plate 5, which increases the contact area of side plate and composite panel, being fixedly connected with of composite panel and biside plate can be realized securely.
Above-mentioned the first junction plate 5 being arranged on the end of left plate 30 and right plate 40, can at the inner side of two side plates and/or outside welding steel using as the first junction plate 5.In order to avoid being welded to connect means in box-girder, first junction plate 5 can also by the end of two side plates to the inside and/or outside extend and formed, such first junction plate 5 be by side plate to the inside and/or outside extend form, first junction plate 5 is steel plate with side plate, welding steel can be avoided on side plate like this using the form of structure as the first junction plate 5, simplify the mounting structure of box-girder, and avoid the defect of welding connecting mode existence.
In specific implementation process, the above-mentioned mode be fixedly connected with can be gluing connection, also can be mechanical connection manner, can also be combination that is gluing and mechanical connection.This mechanical connection manner can be bolt connecting mode.Adopt bolt to be fixedly connected with mode, bolted good stability, the bonding strength between composite panel and the first junction plate can be ensured, and this connected mode installing/dismounting is easy to operate, is convenient to the regular maintenance of box-girder.
In a kind of specific embodiment, as shown in Figure 2, to stretch out respectively formation first junction plate 5 at the left plate 30 of box-girder and the end of right plate 40, be coated with upper glue layer at the external surface of the first junction plate 5, composite panel is connected with two the first junction plates 5 by adhesive means.Adopt adhesive means composite material and the first junction plate 5 to be linked together, thus realize being fixedly connected with of composite panel and two side plates.
In another kind of specific embodiment, as shown in Figure 3, the left plate 30 of box-girder and the end of right plate 40 stretch out formation first junction plate 5 respectively, are fixedly connected with by composite panel by bolt 7 with two the first junction plates 5.Certainly, in this embodiment, can also be coated with upper glue layer at the external surface of the first junction plate 5, composite material is connected by gluing with two the first junction plates 5, and composite panel and two the first junction plates 5 is fixed together by bolt 7.Adopt gluing connection and mechanical connection, with two the first junction plates 5, dual being fixedly connected with is carried out to composite panel, improves the stability and reliability that are fixedly connected with.
In this embodiment, the opposite side being positioned at the first junction plate 5 at composite panel also arranges pressing plate 8, and composite panel is clipped in pressing plate 8 and is fixedly connected with by bolt 7 in the middle of junction plate 5 with first.This pressing plate 8 is steel plate.Understandable, composite panel is clipped in the middle of pressing plate 8 and the first junction plate 5, when box-girder bearing load, the face way of contact is always between three, composite panel is tightly fixed on centre, the point cantact that the first junction plate 5 and/or composite panel occur distortion and formed at bolt link position can be avoided, thus improve connective stability and the reliability of composite panel and side plate; On the other hand, the opposite side being positioned at the first junction plate 5 at composite panel also arranges pressing plate 8, pressing plate 8 increases the contact area of the first junction plate and composite panel, and kept by pressing plate, when composite panel bears pulling force, the link position between composite material and the first junction plate can be avoided to occur phenomenons such as ftractureing, pull, thus improve load-carrying properties and the stress performance of composite panel further.
In the above-described embodiment, composite panel is carbon fibre composite plate.Certainly, other composite panels with excellent compressive property all belong within protection scope of the present invention.
It should be noted that, in the above-described embodiments, in order to improve load-carrying properties and the stress performance of whole box-girder, gusset 9 being also set at base plate 20 and between left plate 30 and right plate 40, to improve the bulk strength of steel plate.
As shown in figs. 4 and 7, the cross section structure schematic diagram of the 3rd, the 4th, the 5th, the 6th embodiment of a kind of box-girder that the present invention proposes is respectively.In this embodiment, composite material is cross section is inverted U-shaped.
With reference to accompanying drawing, the invention provides a kind of box-girder, this box-girder is surrounded by top board 10, base plate 20 and left plate 30 and right plate 40, wherein, top board 10 for cross section be inverted U-shaped composite panel, base plate 20 and left plate 30 and right plate 40 are steel plate.The composite panel of this inverted U structure has two sides, and is fixedly connected with two side plates respectively by these two sides.
In this technical scheme, according to the cross section mechanical property of box-girder in cantilever situation, there is a neutral line in box-girder depth of section direction, pulling force is born on the top of neutral line, and pulling force is upwards increased gradually by neutral line; Pressure is born in the bottom of neutral line, and pressure is increased downwards gradually by neutral line.Therefore, in order to improve load-carrying properties and the stress performance of whole box-girder, more than box-girder neutral line adopting composite panel, adopting composite panel to bear pulling force.It should be noted that; in actual application; it is not more than the neutral line being strictly limited at box-girder about composite panel; namely the side edge length of inverted U-shaped composite panel is not limited in the above-described embodiments, as long as at top board 10 for cross section is that inverted U-shaped composite panel is to bear the pulling force of box-girder just within protection scope of the present invention yet.
Part in compression more than box-girder neutral line is adopted composite panel, can give full play to the tensile property of composite material, steel plate is in pressurized zone simultaneously, can play the compressive property that it is very strong; In addition, while the load-carrying properties improving box-girder and stress performance, the weight of box-girder can also greatly be alleviated.
In a kind of specific embodiment, as shown in Figure 4, the inner side of composite panel dual-side is fixedly connected with by adhesive means with the outside of left plate 30 with right plate 40 respectively.In order to improve load-carrying properties and the stress performance of whole box-girder, gusset 9 can also be also set at base plate 20 and between left plate 30 and right plate 40, to improve the bulk strength of steel plate.
In another kind of specific embodiment, composite panel can also be fixedly connected with two side plates respectively by mechanical connection manner, as shown in Fig. 5, Fig. 6 and Fig. 7, concrete, and this mechanical connection manner can connect for bolt.
Concrete, the first junction plate 5 is respectively equipped with in the end of left plate 30 and right plate 40, the end at cross section being the dual-side of inverted U-shaped composite panel is equipped with the second junction plate 6, first junction plate 5 is fixedly connected with by mechanical connection manner with the second junction plate 6, thus realizes being fixedly connected with of composite panel and two side plates.
Above-mentioned the first junction plate 5 being arranged on the end of left plate 30 and right plate 40, can at the inner side of two side plates and/or outside welding steel using as the first junction plate 5.First junction plate 5 can also by the end of two side plates to the inside and/or outside extend and formed, such first junction plate 5 be by side plate to the inside and/or outside extend form, first junction plate 5 is steel plate with side plate, welding steel can be avoided on side plate like this using the form of structure as the first junction plate 5, simplify the mounting structure of box-girder, and avoid the defect of welding connecting mode existence.In addition, the end of the dual-side that the second junction plate 6 is composite panel to the inside and/or outside extend and formed, certainly, the second junction plate 6 is also for composite material is made.
In a kind of specific embodiment, as shown in Figure 5, the first junction plate 5 is outward extended with respectively in the end of left plate 30 and right plate 40, two sides of composite panel are outward extended with the second junction plate 6 respectively, first junction plate 5 is fixedly connected with by bolt 7 with the second junction plate 6, thus achieves being fixedly connected with of composite panel and two side plates.In this embodiment, the joint face between the first junction plate 5 and the second junction plate 6 can be the neutral line of box-girder, also can at neutral line near part in tension or part in compression, and its particular location is also not construed as limiting.
In a kind of specific embodiment, as shown in Figure 6, extended internally in the end of left plate 30 and right plate 40 first junction plate 5 respectively, two sides of composite panel are extended with the second junction plate 6 respectively to interior, first junction plate 5 is fixedly connected with by bolt 7 with the second junction plate 6, thus achieves being fixedly connected with of composite panel and two side plates.
In a kind of specific embodiment, as shown in Figure 7, in the end of left plate 30 and right plate 40 respectively inwardly and be outwards extended with the first junction plate 5 respectively, two sides of composite panel are respectively to interior and be outward extended with the second junction plate 6, the first corresponding junction plate 5 is fixedly connected with by bolt 7 with the second junction plate 6, thus achieves being fixedly connected with of composite panel and two side plates.
At such as Fig. 5, in embodiment shown in Fig. 6 and Fig. 7, the combination connecting mode of adhesive means and mechanical connection manner can also be adopted, upper glue layer is coated with at the external surface of the first junction plate 5, second junction plate 6 is connected by gluing with the first junction plate 5, and composite panel and two the first junction plates 5 is fixed together by bolt 7.Adopt gluing connection and mechanical connection, with the first junction plate 5, dual being fixedly connected with is carried out to the second junction plate 6, improve the stability and reliability that are fixedly connected with between composite panel with two side plates.
In the above-described embodiments, the opposite side being positioned at the first junction plate 5 at the second junction plate 6 also arranges pressing plate (can referring to figs. 2 and 3 the installation site of center platen), second junction plate 6 is clipped in pressing plate and is fixedly connected with by bolt 7 in the middle of junction plate 5 with first, and pressing plate is steel plate.
In this technical scheme, be clipped in the middle of pressing plate and the first junction plate from outward extending second junction plate of composite panel, when box-girder bearing load, the face way of contact is always between three, second junction plate is tightly fixed on centre, the point cantact that composite connection board and/or side plate occur distortion and formed at bolt link position can be avoided, thus improve connective stability and the reliability of composite panel and side plate; On the other hand, the opposite side being positioned at the first junction plate at the second junction plate arranges pressing plate, increase the contact area of the first junction plate and the second junction plate, and kept by pressing plate, when composite panel bears pulling force, the link position between the second junction plate and the first junction plate can be avoided to occur phenomenons such as ftractureing, pull, thus improve load-carrying properties and the stress performance of composite panel further.
In the above-described embodiment, composite panel is carbon fibre composite plate.Certainly, other composite panels with excellent compressive property all belong within protection scope of the present invention.
In sum, a kind of box-girder that the present invention proposes, takes full advantage of the cross section mechanical property of box-girder in cantilever situation, at least adopts composite panel at the tension side of box-girder.The difference of essence is had relative to composite panel being pasted onto in prior art steel plate external surface, eliminate the steel plate of original box-girder, and the tension active force of box-girder is born completely by composite panel, give full play to the feature that composite panel tensile strength is high, thus improve the bulk strength of box-girder; Adopt composite panel to substitute the steel plate of box-girder tension side, while the load-carrying properties improving box-girder and stress performance, greatly can alleviate the weight of box-girder.
Present invention also offers a kind of jib, comprise the joint arm that more piece is hinged successively, at least one joint described joint arm adopts above-mentioned box-girder to make.
On the other hand, present invention also offers a kind of supporting leg, comprise outrigger arm and the supporting leg being located at its end, described outrigger arm adopts above-mentioned box-girder to make.
Present invention also offers a kind of engineering machinery, adopt above-mentioned jib and/or supporting leg.Such as, this project machinery is concrete mixer.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a box-girder, box structure is surrounded by multi-sheets, it is characterized in that, described box-girder is surrounded by top board (10), base plate (20) and two side plates, described top board (10) for cross section be inverted U-shaped composite panel, described base plate (20) and two side plates are steel plate.
2. box-girder according to claim 1, is characterized in that, the inner side of described composite panel dual-side is fixedly connected with by adhesive means with the outside of two described side plates respectively.
3. box-girder according to claim 1, it is characterized in that, the end of two described side plates is equipped with the first junction plate (5), the end of described composite panel dual-side is equipped with the second junction plate (6), and described first junction plate (5) is fixedly connected with by adhesive means and/or mechanical connection manner with described second junction plate (6).
4. box-girder according to claim 3, it is characterized in that, the end of two described side plates to the inside and/or outside extend to form described first junction plate (5), the end of the dual-side of described composite panel to the inside and/or outside extend to form described second junction plate (6).
5. box-girder according to claim 4, is characterized in that, described first junction plate (5) is that bolt is connected with the mechanical connection manner of described second junction plate (6).
6. box-girder according to claim 5, it is characterized in that, the opposite side being positioned at described first junction plate (5) described second junction plate (6) also arranges pressing plate (8), and described second junction plate (6) to be clipped in the middle of described pressing plate (8) and described first junction plate (5) and to be bolted to connection.
7. the box-girder according to any one of claim 1 to 6, is characterized in that, described composite panel is carbon fibre composite plate.
8. a jib, comprises the joint arm that more piece is hinged successively, it is characterized in that, the described joint arm of at least one joint adopts the box-girder according to any one of claim 1 to 7 to make.
9. a supporting leg, comprises outrigger arm and the supporting leg being located at its end, it is characterized in that, described outrigger arm adopts the box-girder according to any one of claim 1 to 7 to make.
10. an engineering machinery, is characterized in that, adopts jib as claimed in claim 8 and/or supporting leg as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210076194.4A CN102535857B (en) | 2012-03-21 | 2012-03-21 | Box beam, arm support, outrigger and engineering machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210076194.4A CN102535857B (en) | 2012-03-21 | 2012-03-21 | Box beam, arm support, outrigger and engineering machine |
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| Publication Number | Publication Date |
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| CN102535857A CN102535857A (en) | 2012-07-04 |
| CN102535857B true CN102535857B (en) | 2015-07-01 |
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| CN201210076194.4A Active CN102535857B (en) | 2012-03-21 | 2012-03-21 | Box beam, arm support, outrigger and engineering machine |
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Cited By (1)
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| DE202023103230U1 (en) | 2023-06-13 | 2024-09-17 | Liebherr-Mischtechnik Gmbh | distribution boom arm |
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| CN102926540A (en) * | 2012-11-09 | 2013-02-13 | 连云港鹰游碳塑材料有限责任公司 | Pump truck arm rest made of carbon fiber composite materials |
| CN102979077A (en) * | 2012-11-22 | 2013-03-20 | 三一重工股份有限公司 | Dynamic compaction machine |
| CN103015726B (en) * | 2012-12-10 | 2014-03-26 | 中联重科股份有限公司 | Box-shaped arm section processing method, box-shaped arm section and concrete pump truck arm frame |
| CN103015728A (en) * | 2012-12-10 | 2013-04-03 | 中联重科股份有限公司 | Box-shaped arm section, concrete pump truck arm frame and box-shaped arm section processing method |
| CN111173287B (en) * | 2020-03-10 | 2024-05-28 | 三一汽车制造有限公司 | Arm support and operation equipment |
| CN111335638A (en) * | 2020-03-10 | 2020-06-26 | 三一汽车制造有限公司 | Booms and work equipment |
| CN111719865A (en) * | 2020-07-14 | 2020-09-29 | 三一汽车制造有限公司 | Booms, boom assemblies and work machines |
| WO2022011783A1 (en) * | 2020-07-14 | 2022-01-20 | 三一汽车制造有限公司 | Boom, boom assembly and work machine |
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