CN109367627A - A kind of variable cross-section semitrailer lightweight crossbeam - Google Patents
A kind of variable cross-section semitrailer lightweight crossbeam Download PDFInfo
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- CN109367627A CN109367627A CN201811125776.0A CN201811125776A CN109367627A CN 109367627 A CN109367627 A CN 109367627A CN 201811125776 A CN201811125776 A CN 201811125776A CN 109367627 A CN109367627 A CN 109367627A
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- Prior art keywords
- wing plate
- lower wing
- middle section
- crossbeam
- section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/18—Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups B62D21/02 - B62D21/17
- B62D21/20—Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups B62D21/02 - B62D21/17 trailer type, i.e. a frame specifically constructed for use in a non-powered vehicle
Abstract
The invention discloses a kind of variable cross-section semitrailer lightweight crossbeams, and the crossbeam includes: upper flange；Web, lower wing plate, wherein the lower wing plate includes: lower wing plate leading portion；Lower wing plate middle section, the lower wing plate middle section are fixedly connected with the lower wing plate leading portion, and, the lower wing plate middle section has the first middle section, the second middle section, third middle section and the 4th middle section；Lower wing plate back segment, wherein the width in the lower wing plate middle section is greater than the width of the lower wing plate leading portion and the lower wing plate back segment.The crossbeam of current traditional technology production is solved since crossbeam lower wing plate section is identical, there is technical issues that not guaranteeing in the case where controlling whole crossbeam weight.Lower wing plate is reached using variable cross-section segment design, max architecture rigidity is obtained under equivalent weight, reduces semitrailer crossbeam the greatest danger point stress, increases crossbeam service life, on the basis of guaranteeing crossbeam unit mass rigidity and bending resistance degree, light-weighted technical effect has been carried out.
Description
Technical field
The present invention relates to trailer crossbeam technical field more particularly to a kind of variable cross-section semitrailer lightweight crossbeams.
Background technique
Existing semitrailer girder is mainly made of the frame structure that two steel crossbeams and Duo Gen crossbeam are constituted, provides
Bearing capacity and rigidity required for vehicle, with the increase of vehicle lightweight demand, crossbeam loss of weight increase in demand is light in manufacture
Quantify in crossbeam and existing crossbeam production technology, stringer own wt is very big, and stringer is thicker with steel, necessary when carrying out lightweight
The thickness and width size for reducing lower wing plate overall length, causes biggish loss to overall stiffness, in turn results in local stress increasing
Greatly, fatigue life declines, and Beam fracture is caused to cause severe compromise.Web and bottom wing Board position especially at crossbeam gooseneck
For stress concentration point and the highest position of cracking rate.
But present invention applicant during technical solution, has found the above-mentioned prior art extremely in realizing the embodiment of the present application
It has the following technical problems less:
The crossbeam of traditional technology production at present can not control whole crossbeam weight since crossbeam lower wing plate section is identical
In the case of guarantee safety.
Summary of the invention
The present invention provides a kind of variable cross-section semitrailer lightweight crossbeams, to solve the crossbeam of current traditional technology production
Since crossbeam lower wing plate section is identical, existing can not guarantee that the technology of safety is asked in the case where controlling whole crossbeam weight
Topic.
The present invention provides a kind of variable cross-section semitrailer lightweight crossbeams, and the crossbeam includes: upper flange；Web, it is described
One side of web is vertical with the upper flange to be connect；Lower wing plate, the lower wing plate is vertical with another side of the web to be connect,
Wherein, the lower wing plate includes: lower wing plate leading portion；Lower wing plate middle section, the lower wing plate middle section are fixed with the lower wing plate leading portion
Connection, and, the lower wing plate middle section has the first middle section, the second middle section, third middle section and the 4th middle section, wherein described first
Between middle section and second middle section between the first angle, second middle section and the third middle section have second folder
There is third angle between angle, the third middle section and the 4th middle section；Lower wing plate back segment, the lower wing plate back segment with it is described
Lower wing plate middle section is fixedly connected, wherein after the width in the lower wing plate middle section is greater than the lower wing plate leading portion and the lower wing plate
The width of section.
Preferably, first middle section, second middle section, the third middle section and the 4th middle section are integrated into
Shape.
Preferably, the thickness in the lower wing plate middle section is greater than the lower wing plate leading portion and the lower wing plate back segment 0-20mm.
Preferably, the width in the lower wing plate middle section is greater than the lower wing plate leading portion and the lower wing plate back segment 0-200mm.
Preferably, the length in the lower wing plate middle section is 500-3000mm.
Preferably, one end width of the web is less than the other end.
Preferably, the lower wing plate middle section is positioned close to the small one end of the web width, and, it is wide apart from the web
Spend small one end end 0-3000mm.
Preferably, the material yield strength of the lower wing plate is 345-1100MPa.
Preferably, first angle, second angle and the third angle are 90-270 °.
Preferably, the lower wing plate middle section is raised to the web direction.
Said one or multiple technical solutions in the embodiment of the present invention at least have following one or more technology effects
Fruit:
In a kind of variable cross-section semitrailer lightweight crossbeam provided in an embodiment of the present invention, the cross that the crossbeam passes through upper flange
To center line and one side vertical welding of web, another side of web and lower wing plate vertical welding, Formation cross-section is I-shaped
Shape overall structure, wherein the lower wing plate is formed by lower wing plate leading portion, lower wing plate middle section, lower wing plate back segment by welding,
In, the width in the lower wing plate middle section is greater than the width of the lower wing plate leading portion and the lower wing plate back segment, so that section is segmented
It is changed, i.e., the area of section of the described lower wing plate leading portion and the section face in the lower wing plate middle section and the lower wing plate back segment
Product is different, and the lower wing plate middle section, to which area of section increases, is segmented by the section and is changed, for stress because of width maximum
Centrostigma is reinforced, and other positions weight accordingly mitigates, to make to obtain lower wing plate middle section maximum under whole equivalent weight
The rigidity of structure, i.e. width at raising gooseneck avoid at gooseneck weight saving due to rigidity declines, and the lower wing plate middle section institute
Crossbeam gooseneck at for stress concentration point easily cause Beam fracture, thus the rigidity by improving lower wing plate improves crossbeam list
Position quality rigidity, and then reduce semitrailer crossbeam the greatest danger point stress, in addition the lower wing plate middle section has the first middle section, the
Two middle sections, third middle section and the 4th middle section, wherein there is the first angle, institute between first middle section and second middle section
It states between the second middle section and the third middle section with having the between the second angle, the third middle section and the 4th middle section
Three angles form formation certain space raised to the web direction by continuous angle, turn semitrailer wheel substantially
To having sufficient steering space, avoids wheel from contacting friction with the crossbeam, influence the normal operation of semitrailer, or cause more
Serious consequence.The crossbeam of prior art production is to sum up solved since crossbeam lower wing plate section is identical, existing can not be whole in control
The technical issues of guaranteeing safety in the case where body crossbeam weight has reached lower wing plate using variable cross-section segment design, Ke Yi
Max architecture rigidity is obtained under equivalent weight, and then reduces the cracking risk of semitrailer crossbeam stress concentrated position, increases crossbeam
Service life has carried out lightweight on the basis of guaranteeing crossbeam unit mass rigidity and bending resistance degree, guarantees whole crossbeam peace
The technical effect of full property.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of variable cross-section semitrailer lightweight crossbeam of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of lower wing plate in the embodiment of the present invention.
Description of symbols: upper flange 1, web 2, lower wing plate 3, lower wing plate leading portion 31, lower wing plate middle section 32, after lower wing plate
Section 33.
Specific embodiment
The embodiment of the invention provides a kind of variable cross-section semitrailer lightweight crossbeams, solve current traditional technology production
There is the technology that can not guarantee safety in the case where controlling whole crossbeam weight since crossbeam lower wing plate section is identical in crossbeam
Problem.
Technical method in the embodiment of the present invention, general thought are as follows:
Upper flange；Web, one side of web is vertical with the upper flange to be connect；Lower wing plate, the lower wing plate and institute
Another side for stating web vertically connects, wherein the lower wing plate includes: lower wing plate leading portion；Lower wing plate middle section, the lower wing plate
Middle section is fixedly connected with the lower wing plate leading portion, and, the lower wing plate middle section has the first middle section, the second middle section, third middle section
And the 4th middle section, wherein have between first middle section and second middle section the first angle, second middle section with it is described
Between third middle section between the second angle, the third middle section and the 4th middle section have third angle；After lower wing plate
Section, the lower wing plate back segment is fixedly connected with the lower wing plate middle section, wherein the width in the lower wing plate middle section is greater than under described
The width of wing plate leading portion and the lower wing plate back segment.Reach lower wing plate and uses variable cross-section segment design, it can be in equivalent weight
Lower acquisition max architecture rigidity, and then reduce the cracking risk of semitrailer crossbeam stress concentrated position, increase crossbeam service life,
On the basis of guaranteeing crossbeam unit mass rigidity and bending resistance degree, lightweight has been carried out, has guaranteed the skill of whole crossbeam safety
Art effect.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment one
Fig. 1 is a kind of structural schematic diagram of variable cross-section semitrailer lightweight crossbeam in the embodiment of the present invention.As shown in Figure 1,
The crossbeam includes:
Upper flange 1.
Specifically, the upper flange 1 is important composition component in semitrailer crossbeam main beam structure, it is solid with semitrailer vehicle bottom
Fixed connection, usually thickness made of high-strength steel is not less than the strip steel plate of 5mm, has strong supporting role.
Web 2,2 one side of web is vertical with the upper flange 1 to be connect.
Further, one end width of the web is less than the other end.
Specifically, the web 2 is to connect stressed member, thus the stress of the web 2 in the crossbeam main beam structure
Degree direct influence the stress-bearing capability of crossbeam, generally select the high high-strength steel of yield strength and be made, thickness be not less than 5mm, protect
The stress degree for demonstrate,proving crossbeam avoids it from cracking and influences to use, more causes serious consequence.In addition, in order to guarantee trailer tyre just
Often rotation, especially in turning to avoid tire from mutually rubbing with the crossbeam, the web 2 is the small design of nose width,
Enough steering spaces are provided when installation for the tire steering of semitrailer.
Lower wing plate 3, the lower wing plate 3 is vertical with another side of the web 2 to be connect.
Further, the material yield strength of the lower wing plate 3 is 345-1100MPa.
Specifically, high-strength steel of the lower wing plate 3 by thickness not less than 5mm yield strength 345-1100MPa is made, it is excellent
Selecting yield strength is 500-900 better effect, has load capacity big, and support force is strong, is the big cargo of semitrailer hauled weight
Strong support is provided, the lower wing plate 3 has collectively constituted the girder knot of the crossbeam with the upper flange 1, the web 2
Structure, a side end face of the web 2 and the 1 transverse center wire bonding of upper flange, another side end face of the web 2 with it is described
The transverse center wire bonding of lower wing plate 3, i.e. its section are I-shaped, are provided strong support for semitrailer.
Wherein, the lower wing plate 3 includes: lower wing plate leading portion 31, lower wing plate middle section 32, lower wing plate back segment 33.The bottom wing
The width in plate middle section 32 is greater than the width of the lower wing plate leading portion 31 and the lower wing plate back segment 33.
Further, the thickness in the lower wing plate middle section is greater than the lower wing plate leading portion and the lower wing plate back segment 0-
20mm。
Further, the width in the lower wing plate middle section is greater than the lower wing plate leading portion and the lower wing plate back segment 0-
200mm。
Specifically, the lower wing plate 3 divide be before, during and after three sections, pass sequentially through and welding shape carried out using gas shielded arc welding
It is integral, wherein after width, the thickness in the lower wing plate middle section 32 are all larger than the lower wing plate leading portion 31 and the lower wing plate
Section 33, the width in the lower wing plate middle section 32 lower wing plate leading portion 31 and the lower wing plate back segment 33 increase 0-200mm, excellent
It selects 30-100mm more preferably, the steel plate of same widths can also be selected to save production cost according to the steel using different in width.Institute
The thickness lower wing plate leading portion 31 and the lower wing plate back segment 33 for stating lower wing plate middle section 32 increase 0-20mm, preferably 5-
12mm, while the steel of different-thickness can be used in the thickness of the lower wing plate leading portion 31 and the lower wing plate back segment 33, can also be with
The steel of same thickness are used to save production cost, but since the gooseneck of the crossbeam is arranged in the lower wing plate middle section 32
Place is stress concentration point, after the thickness in the lower wing plate middle section 32 has to be larger than the lower wing plate leading portion 31 and the lower wing plate
Section 33 guarantees that the lower wing plate middle section 32 obtains max architecture rigidity under equivalent weight, by described using the thickness of steel plate
The width increasing in lower wing plate middle section 32 increases the area of section at the lower wing plate middle section 32, passes through its width and thickness phase
Match, to ensure that crossbeam unit mass rigidity, makes in carrying out light-weight technologg, by main stress point, that is, lower wing plate middle section 32
Reinforced, other positions carry out corresponding light-weight technologg, make on the basis of guaranteeing light weight degree, avoid because of light weight processing
Caused by stress point crack, to ensure that emphasis force part load capacity does not subtract, the small position of remaining stress is carried out
Weight is reduced, and has been reached the variable cross-section segment design of the lower wing plate use for gooseneck position, can have been obtained under equivalent weight
Max architecture rigidity, and then reduce semitrailer crossbeam the greatest danger point stress, increase crossbeam service life, guarantees crossbeam unit
On the basis of quality rigidity and bending resistance degree, lightweight has been carried out, has guaranteed the technical effect of whole crossbeam safety.In addition, institute
It is preferably 500-900MPa that lower wing plate leading portion 31 and the lower wing plate back segment 33, which are stated, using the yield strength of steel, the lower wing plate
Middle section 32 is larger due to selecting thickness of steel product, is preferably 500- according to the steel yield strength that processing actual conditions use
700MPa can make crossbeam realize load-bearing capacity that is light-weighted while guaranteeing crossbeam, while certain journey in mitigation weight in this way
The technical effect for reducing production cost is realized on degree.
Lower wing plate middle section 32, the lower wing plate middle section 32 are fixedly connected with the lower wing plate leading portion 31, and, the lower wing plate
Middle section 32 has the first middle section, the second middle section, third middle section and the 4th middle section, wherein in first middle section and described second
Section between have between the first angle, second middle section and the third middle section have the second angle, the third middle section and
There is third angle between 4th middle section；
Further, first middle section, second middle section, the third middle section and the 4th middle section are integrated into
Shape.
Further, the length in the lower wing plate middle section 32 is 500-3000mm.
Further, the lower wing plate middle section 32 is positioned close to the small one end of 2 width of web, and, described in distance
The small one end end 0-3000mm of 2 width of web.
Further, first angle, second angle and the third angle are 90-270 °.
Further, the lower wing plate middle section 32 is raised to 2 direction of web.
Specifically, the lower wing plate middle section 32 is that length 500-3000mm is arranged at the semitrailer crossbeam gooseneck,
One end end 0-3000mm of the front end in the lower wing plate middle section 32 apart from the crossbeam front end, that is, narrower width, preferably
1500-3000mm, the rear end in the lower wing plate middle section 32 is apart from the crossbeam front end 500-9000mm, preferred 4000-
7000mm, the lower wing plate middle section 32 are the main stress concentration point of the crossbeam, and easily the place cracked occur, herein
Rigidity is even more important, and influences the support strength of entire crossbeam, and 32 use of lower wing plate middle section described in the embodiment of the present invention has
The one fixed width and thicker high-strength steel of thickness is made, by bending three times, formed the first middle section, the second middle section, third middle section and
4th middle section has certain angle between every section, be by 32 folding of lower wing plate middle section it is raised to 2 direction of web, by institute
It states web 2 to be smoothly transitted by the biggish position of width to the lesser position of 2 width of web, be provided adequately for lower section tire
Turning space, avoids contacting friction with wheel when the semitrailer is significantly turned, guarantees the normal of the semitrailer
Transport.
Embodiment two
For the clearer elaboration present invention, below by the embodiment of the present invention to a kind of variable cross-section semitrailer of the invention
The service condition and unit mass rigidity test result of lightweight crossbeam are described in detail.
Crossbeam described in the embodiment of the present invention can be used for lightweight commercial vehicle or working environment complexity, often abuse
In the specific use commercial vehicle of operating condition, such as 13 meters of flat bed trailers, 12.5 meters of framework semi-trailers, 17.5 meters of low flat bed semi trailers
Deng, below for all types of semitrailers using the crossbeam carry out unit mass rigidity test:
Shown in 13 meters of semi-mounted storehouse grid car owner's beams, 13 meters of beam length, load capacity of 50 tons, variable cross-section crossbeam of the present invention and Fig. 1
Traditional flat bed trailer crossbeam structure is different, and lower wing plate structure of the invention is the design of segmented variable cross-section.In main beam structure,
Upper flange uses 6mm thickness 140mm wide 700MPa high-strength steel, and web uses 5mm thickness 700MPa high-strength steel, and lower wing plate leading portion uses
6mm thickness 140mm wide 700MPa high-strength steel, lower wing plate middle section (at gooseneck) uses 14mm thickness 160mm wide, 500MPa beam steel, long
Spend 2000mm.Lower wing plate back segment uses 6m thickness 140mm wide 700MPa high-strength steel.Three sections of lower wing plates use gas shielded arc welding pair
It connects, is welded into whole crossbeam with upper flange, web afterwards.Crossbeam structure rigidity is 2.5*107N/m, and unit mass rigidity is
62814N/m*kg improves 10% or more compared to conventional cross-section designing unit quality rigidity.
Shown in 13 meters of semi-mounted storehouse grid car owner's beams, 13 meters of beam length, load capacity of 50 tons, variable cross-section crossbeam of the present invention and Fig. 1
Traditional flat bed trailer crossbeam structure is different, and lower wing plate structure of the invention is the design of segmented variable cross-section.In main beam structure,
Upper flange uses 6mm thickness 140mm wide 960MPa high-strength steel, and web uses 5mm thickness 960MPa high-strength steel, and lower wing plate leading portion uses
6mm thickness 140mm wide 960MPa high-strength steel, lower wing plate middle section (at gooseneck) uses 10mm thickness 300mm wide, 700MPa beam steel, long
Spend 2500mm.Lower wing plate back segment uses 6m thickness 140mm wide 960MPa high-strength steel.Three sections of lower wing plates use gas shielded arc welding pair
It connects, is welded into whole crossbeam with upper flange, web afterwards.Crossbeam structure rigidity is 2.63*107N/m, and unit mass rigidity is
65310N/m*kg improves 15% or more compared to conventional cross-section designing unit quality rigidity.
Shown in 13 meters of semi-mounted storehouse grid car owner's beams, 13 meters of beam length, load capacity of 50 tons, variable cross-section crossbeam of the present invention and Fig. 1
Traditional flat bed trailer crossbeam structure is different, and lower wing plate structure of the invention is the design of segmented variable cross-section.In main beam structure,
Upper flange uses 6mm thickness 140mm wide 1100MPa high-strength steel, and web uses 5mm thickness 1100MPa high-strength steel, and lower wing plate leading portion uses
6mm thickness 140mm wide 1100MPa high-strength steel, lower wing plate middle section (at gooseneck) uses 12mm thickness 220mm wide, 600MPa beam steel, long
Spend 3000mm.Lower wing plate back segment uses 6m thickness 140mm wide 1100MPa high-strength steel.Three sections of lower wing plates use gas shielded arc welding
Docking, is welded into whole crossbeam with upper flange, web afterwards.Crossbeam structure rigidity is 2.71*107N/m, and unit mass rigidity is
68040N/m*kg improves 20% or more compared to conventional cross-section designing unit quality rigidity.
12.5 meters of container framework cars, 12.5 meters of beam length, variable cross-section crossbeam design of the present invention is as follows: main beam structure
In, upper flange uses 6.5mm thickness 140mm wide 700MPa high-strength steel, and web uses 6mm thickness 700MPa high-strength steel, lower wing plate leading portion
Using 8mm thickness 140mm wide 700MPa high-strength steel, lower wing plate middle section (at gooseneck) uses 10mm thickness 150mm wide, 960MPa crossbeam
Steel, length 2500mm.Lower wing plate back segment uses 8m thickness 140mm wide 7100MPa high-strength steel.Three sections of lower wing plates are protected using gas
Shield weldering docking, is welded into whole crossbeam with upper flange, web afterwards.Crossbeam structure rigidity is 3.2*107N/m, and unit mass is rigid
Degree is 93921N/m*kg, improves 10% or more compared to conventional cross-section designing unit quality rigidity.
12.5 meters of container framework cars, 12.5 meters of beam length, variable cross-section crossbeam design of the present invention is as follows: main beam structure
In, upper flange uses 8mm thickness 140mm wide 500MPa beam steel, and web uses 7mm thickness 345MPa high-strength steel, and lower wing plate leading portion is adopted
With 12mm thickness 140mm wide 500MPa high-strength steel, lower wing plate middle section (at gooseneck) uses 16mm thickness 150mm wide, 345MPa beam steel,
Length 1500mm.Lower wing plate back segment uses 12m thickness 140mm wide 500MPa high-strength steel.Three sections of lower wing plates use gas shield
Weldering docking, is welded into whole crossbeam with upper flange, web afterwards.Crossbeam structure rigidity is 3.3*107N/m, unit mass rigidity
For 95983N/m*kg, 14% or more is improved compared to conventional cross-section designing unit quality rigidity.
12.5 meters of container framework cars, 12.5 meters of beam length, variable cross-section crossbeam design of the present invention is as follows: main beam structure
In, upper flange uses 5mm thickness 150mm wide 960MPa beam steel, and web uses 5mm thickness 960MPa high-strength steel, and lower wing plate leading portion is adopted
With 7mm thickness 140mm wide 960MPa high-strength steel, lower wing plate middle section (at gooseneck) uses 14mm thickness 150mm wide, 700MPa beam steel,
Length 1500mm.Lower wing plate back segment uses 7m thickness 140mm wide 960MPa high-strength steel.Three sections of lower wing plates use gas shielded arc welding
Docking, is welded into whole crossbeam with upper flange, web afterwards.Crossbeam structure rigidity is 3.1*107N/m, and unit mass rigidity is
96271N/m*kg improves 20% or more compared to conventional cross-section designing unit quality rigidity.
17.5 meters of low bed trailers, 17.5 meters of beam length, variable cross-section crossbeam design of the present invention is as follows: main beam structure
In, upper flange uses 10mm thickness 150mm wide 700MPa beam steel, and web uses 8mm thickness 700MPa high-strength steel, and lower wing plate leading portion is adopted
With 10mm thickness 140mm wide 700MPa high-strength steel, lower wing plate middle section (at gooseneck) uses 14mm thickness 150mm wide, 600MPa beam steel,
Length 2000mm.Lower wing plate back segment uses 10m thickness 140mm wide 700MPa high-strength steel.Three sections of lower wing plates use gas shield
Weldering docking, is welded into whole crossbeam with upper flange, web afterwards.Crossbeam structure rigidity is 2.8*107N/m, unit mass rigidity
For 72134N/m*kg, 10% or more is improved compared to conventional cross-section designing unit quality rigidity.
17.5 meters of low bed trailers, 17.5 meters of beam length, variable cross-section crossbeam design of the present invention is as follows: main beam structure
In, upper flange uses 6mm thickness 150mm wide 1100MPa beam steel, and web uses 5mm thickness 1100MPa high-strength steel, lower wing plate leading portion
Using 8mm thickness 140mm wide 1100MPa high-strength steel, lower wing plate middle section (at gooseneck) uses 12mm thickness 150mm wide, 700MPa crossbeam
Steel, length 2000mm.Lower wing plate back segment uses 8m thickness 140mm wide 1100MPa high-strength steel.Three sections of lower wing plates are protected using gas
Shield weldering docking, is welded into whole crossbeam with upper flange, web afterwards.Crossbeam structure rigidity is 3.01*107N/m, and unit mass is rigid
Degree is 73242N/m*kg, improves 16% or more compared to conventional cross-section designing unit quality rigidity.
17.5 meters of low bed trailers, 17.5 meters of beam length, variable cross-section crossbeam design of the present invention is as follows: main beam structure
In, upper flange uses 7mm thickness 150mm wide 900MPa beam steel, and web uses 6mm thickness 900MPa high-strength steel, and lower wing plate leading portion is adopted
With 8mm thickness 140mm wide 900MPa high-strength steel, lower wing plate middle section (at gooseneck) uses 14mm thickness 150mm wide, 500MPa beam steel,
Length 3000mm.Lower wing plate back segment uses 8m thickness 140mm wide 900MPa high-strength steel.Three sections of lower wing plates use gas shielded arc welding
Docking, is welded into whole crossbeam with upper flange, web afterwards.Crossbeam structure rigidity is 2.6*107N/m, and unit mass rigidity is
71234N/m*kg improves 20% or more compared to conventional cross-section designing unit quality rigidity.
It is obtained by above-mentioned each data, crossbeam described in the embodiment of the present invention, can be with by using variable cross-section segment design
Max architecture rigidity is obtained under equivalent weight, by improving crossbeam unit mass rigidity, and then it is maximum to reduce semitrailer crossbeam
Dangerous point stress, so that since crossbeam lower wing plate section is identical, exist can not be for the crossbeam for solving the production of existing traditional technology
The technical issues of guaranteeing safety in the case where controlling whole crossbeam weight, having reached realizes while loss of weight, can be with
Reduce malformation, improves the technical effect of the rigidity of structure.
The technical solution provided in the embodiment of the present application, has at least the following technical effects or advantages:
In a kind of variable cross-section semitrailer lightweight crossbeam provided in an embodiment of the present invention, the cross that the crossbeam passes through upper flange
To center line and one side vertical welding of web, another side of web and lower wing plate vertical welding, Formation cross-section is I-shaped
Shape overall structure, wherein the lower wing plate is formed by lower wing plate leading portion, lower wing plate middle section, lower wing plate back segment by welding,
In, the width in the lower wing plate middle section is greater than the width of the lower wing plate leading portion and the lower wing plate back segment, so that section is segmented
It is changed, i.e., the area of section of the described lower wing plate leading portion and the section face in the lower wing plate middle section and the lower wing plate back segment
Product is different, and the lower wing plate middle section, to which area of section increases, is segmented by the section and is changed, for stress because of width maximum
Centrostigma is reinforced, and other positions weight accordingly mitigates, to make to obtain lower wing plate middle section maximum under whole equivalent weight
The rigidity of structure, i.e. width at raising gooseneck avoid at gooseneck weight saving due to rigidity declines, and the lower wing plate middle section institute
Crossbeam gooseneck at for stress concentration point easily cause Beam fracture, thus the rigidity by improving lower wing plate improves crossbeam list
Position quality rigidity, and then reduce semitrailer crossbeam the greatest danger point stress, in addition the lower wing plate middle section has the first middle section, the
Two middle sections, third middle section and the 4th middle section, wherein there is the first angle, institute between first middle section and second middle section
It states between the second middle section and the third middle section with having the between the second angle, the third middle section and the 4th middle section
Three angles form formation certain space raised to the web direction by continuous angle, turn semitrailer wheel substantially
To having sufficient steering space, avoids wheel from contacting friction with the crossbeam, influence the normal operation of semitrailer, or cause more
Serious consequence.The crossbeam of prior art production is to sum up solved since crossbeam lower wing plate section is identical, existing can not be whole in control
The technical issues of guaranteeing safety in the case where body crossbeam weight has reached lower wing plate using variable cross-section segment design, Ke Yi
Max architecture rigidity is obtained under equivalent weight, and then reduces the cracking risk of semitrailer crossbeam stress concentrated position, increases crossbeam
Service life has carried out lightweight on the basis of guaranteeing crossbeam unit mass rigidity and bending resistance degree, guarantees whole crossbeam peace
The technical effect of full property.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, those skilled in the art can carry out various modification and variations without departing from this hair to the embodiment of the present invention
The spirit and scope of bright embodiment.In this way, if these modifications and variations of the embodiment of the present invention belong to the claims in the present invention
And its within the scope of equivalent technologies, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of variable cross-section semitrailer lightweight crossbeam, which is characterized in that the crossbeam includes:
Upper flange；
Web, one side of web is vertical with the upper flange to be connect；
Lower wing plate, the lower wing plate is vertical with another side of the web to be connect, wherein the lower wing plate includes:
Lower wing plate leading portion；
Lower wing plate middle section, the lower wing plate middle section are fixedly connected with the lower wing plate leading portion, and, the lower wing plate middle section has the
One middle section, the second middle section, third middle section and the 4th middle section, wherein have the between first middle section and second middle section
There is the second angle, the third middle section and the 4th middle section between one angle, second middle section and the third middle section
Between have third angle；
Lower wing plate back segment, the lower wing plate back segment are fixedly connected with the lower wing plate middle section,
Wherein, the width in the lower wing plate middle section is greater than the width of the lower wing plate leading portion and the lower wing plate back segment.
2. crossbeam as described in claim 1, which is characterized in that first middle section, second middle section, the third middle section
It is one of the forming with the 4th middle section.
3. crossbeam as described in claim 1, which is characterized in that the thickness in the lower wing plate middle section is greater than the lower wing plate leading portion
With the lower wing plate back segment 0-20mm.
4. crossbeam as claimed in claim 3, which is characterized in that the width in the lower wing plate middle section is greater than the lower wing plate leading portion
With the lower wing plate back segment 0-200mm.
5. crossbeam as claimed in claim 4, which is characterized in that the length in the lower wing plate middle section is 500-3000mm.
6. crossbeam as described in claim 1, which is characterized in that one end width of the web is less than the other end.
7. crossbeam as claimed in claim 6, which is characterized in that it is small that the lower wing plate middle section is positioned close to the web width
One end, and, one end end 0-3000mm small apart from the web width.
8. crossbeam as described in claim 1, which is characterized in that the material yield strength of the lower wing plate is 345-1100MPa.
9. crossbeam as described in claim 1, which is characterized in that first angle, second angle and third folder
Angle is 90-270 °.
10. crossbeam as claimed in claim 9, which is characterized in that the lower wing plate middle section is raised to the web direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811125776.0A CN109367627A (en) | 2018-09-26 | 2018-09-26 | A kind of variable cross-section semitrailer lightweight crossbeam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811125776.0A CN109367627A (en) | 2018-09-26 | 2018-09-26 | A kind of variable cross-section semitrailer lightweight crossbeam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109367627A true CN109367627A (en) | 2019-02-22 |
Family
ID=65401949
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811125776.0A Pending CN109367627A (en) | 2018-09-26 | 2018-09-26 | A kind of variable cross-section semitrailer lightweight crossbeam |
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| Country | Link |
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| CN (1) | CN109367627A (en) |
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| CN112319661A (en) * | 2020-10-22 | 2021-02-05 | 东风华神汽车有限公司 | Processing method of variable cross-section frame longitudinal beam, variable cross-section frame longitudinal beam and vehicle |
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Application publication date: 20190222 |