CN105691459A - Longitudinal beam for semitrailer and semitrailer - Google Patents

Abstract

The invention provides a longitudinal beam for a semitrailer and the semitrailer. The longitudinal beam at least comprises two components including an upper fender and a lower fender. All the components are assembled, fixed and formed through fasteners. By the adoption of the longitudinal beam for the semitrailer, all the components of the longitudinal beam are assembled, fixed and formed through the fasteners, so that a large number of welding workloads are reduced, and quality defects caused by welding are avoided; and the components are fixedly connected through the fasteners, the problems of the quality defects and the high labor cost which are caused by welding are thoroughly solved, the product quality of the longitudinal beam of the semitrailer is improved, the later treatment of the quality defects is reduced, and the labor cost is reduced.

Description

The longeron of a kind of semitrailer and semitrailer

Technical field

The invention belongs to semitrailer technical field, be specifically related to the longeron of a kind of semitrailer and there is the semitrailer of this longeron。

Background technology

The current semi-trailer longitudinal beam steel design adopting Q345 or Q235, is shaped as " work " font, upper flange, web and three pieces of flat board members of lower wing plate is welded to form more。The more problems that this kind of welding procedure causes: such as welding capacity causes greatly the defects such as crossbeam welding deformation is serious, size Control is bad；Inspection in welding process and after welding is wasted time and energy；Lost time is more causes that manufacturing cost and cost of labor increase accordingly；Later period maintenance cost is also of a relatively high。Meanwhile, longeron mostly is steel design, not only considerably increases car body deadweight, and reduces the carrying capacity of semitrailer。It addition, the easy corrosion of steel and welding bead surface, the whole service life greatly reducing semitrailer is shorter。

In order to reduce the deadweight of semitrailer, currently also occurring in that the aluminum longeron of " work " font, for monoblock type extrusion profile, namely longeron end face is prismatic。This kind of longeron is often due to the poor appearance of aluminum alloy material rigidity is substantially recessed in actual load process, and the restriction of the machine tonnage that is simultaneously squeezed, " sectional dimension " of extrudate is also restricted, especially the height dimension of longeron。This longeron is for the higher semitrailer product of requirement of strength, it is clear that occurred in that a lot of limitation。

Summary of the invention

The present invention provides the longeron of a kind of semitrailer, fixed by the assembly connection between parts, it is to avoid substantial amounts of welding, improves the workmanship of longeron, reduces cost of labor。

For reaching above-mentioned technical purpose, the present invention realizes by the following technical solutions:

The longeron of a kind of semitrailer, described longeron at least includes upper flange and two parts of lower wing plate, and each parts are assembled fixed-type by securing member by described longeron。

Further, described upper flange is section bar, and described upper flange has upper flange body and the upper flange installation portion downwardly extended along upper flange body。

Further, described lower wing plate is section bar, and described lower wing plate has lower wing plate body and along the upwardly extending lower wing plate installation portion of lower wing plate body。

Further, one of them of described upper flange installation portion and lower wing plate installation portion is vertical plate, and the end of the other in which of described upper flange installation portion and lower wing plate installation portion is provided with the wing plate recess matched with vertical plate, and described vertical plate is positioned at described recess。

Further, the median plane of described upper flange installation portion and lower wing plate installation portion overlaps。

Further, described longeron also includes the web between described upper flange and lower wing plate, and the both ends up and down of described web connect by securing member is fixing respectively at described upper flange and lower wing plate。

Further, described upper flange installation portion is provided with the upper flange recess that the upper end with described web matches, and described lower wing plate installation portion is provided with the lower wing plate recess that the bottom with described web matches。

Further, described upper flange body has the first noumenon being positioned at inside described upper flange installation portion and is positioned at the second body outside described upper flange installation portion, and the width of described the first noumenon is less than the width of described second body。

Further, the lower surface of described second body includes the first inclined-plane first plane parallel with the upper surface of upper flange body and the second inclined-plane from outside to inside successively。

Further, the angle between described first inclined-plane and horizontal plane is more than or equal to the angle between described second inclined-plane and horizontal plane。

Further, in the lower surface of the first plane on described second body and described the first noumenon is generally aligned in the same plane。

Based on the longeron of above-mentioned semitrailer, the present invention also provides for a kind of semitrailer, has the parallel longitudinal longeron arranging two above-mentioned semitrailers。

Described semitrailer also includes a front beam, a rear cross beam and floor, described front beam is vertically set on the front end of two longerons, described rear cross beam is vertically set on the rear end of two longerons, described front beam and rear cross beam are connected to the rear and front end on described floor respectively, fixing for assembly connection between described floor and two longerons, described front beam and rear cross beam respectively and are fixed for assembly connection between two longerons。

Further, described floor is formed by connecting by the many section bars at least with a chamber being laterally laid on two longerons and playing cross-brace effect。

Further, described vehicle frame also includes two side bars, and two side bars are separately positioned on the left and right sides, described floor, and the upper surface of described floor, front beam, rear cross beam and two side bars forms loading platform。

Further, described assembly connection is fixed as and connects by securing member is fixing。

Further, it is provided with side bar connector between described side bar and described floor, front beam and rear cross beam, fixes for assembly connection between described side bar and side bar connector。

Further, described floor includes many first floor profiles being laterally laid on two longerons, mutual clamping between two adjacent described first floor profiles。

Further, described first floor profile has at least one chamber。

Further, one side lower part of described first floor profile be provided with outward extending for described longeron assemble first outside extend installing plate, the opposite side bottom of described first floor profile be provided with the first installation groove and along the first inside bending in edge installing groove extend first in extend installing plate；Extend installing plate in described first and be superimposed upon the top being adjacent the connect first outer extension installing plate, extend in securing member traverse first and extend installing plate outside installing plate and first and fix with described longeron。

Further, the described first outer end extending installing plate also has flange upwards, and described flange is positioned at the described first outside extending installing plate。

Further, the top of the side of described first floor profile is provided with the first inner card cage caved inward, and the top of opposite side is provided with the first exterior bayonet slot that is outwardly and that match with described first inner card cage；Described first inner card cage fastens with being adjacent the first exterior bayonet slot connect。

Further, described first floor profile is provided with two parallel chutes along described first floor profile length direction, is provided with the dividing plate of T-shaped between two described chutes。

Further, described floor also includes transversely movable positioning sliding block, and the lower end of described positioning sliding block is provided with two claws matched with two described chutes, and described claw is positioned at described chute。

Further, the top of described first floor profile is additionally provided with anti-skidding boss protruding upward。

Further, described first floor profile includes the first upper plate of be arrangeding in parallel and the first lower plate, vertically disposed first front side board, the first back side panel and middle connecting plate and the installation concave-board parallel with described first upper plate and coulisse, is respectively equipped with two oblique connecting plates between described coulisse two ends and middle connecting plate。

Further, it is provided with arc between described coulisse and the first upper plate。

Further, the distance between described middle connecting plate with described first front side board and the first back side panel is equal。

Further, the width of described coulisse is equal with the width of described oblique connecting plate。

Further, described floor includes the first alternately arranged floor profile and the second floor profile, and mutual clamping between adjacent described first floor profile and the second floor profile, the width of described second floor profile is more than the width of described first floor profile。

Further, described first floor profile and the second floor profile are laterally laid on the upper surface of described two longerons。

Further, the side of described first floor profile be provided with outward extending for the first of described two longerons assemblings outside extend installing plate, the opposite side bottom of described first floor profile be provided with the first installation groove and along the first inside bending in edge installing groove extend first in extend installing plate；One side lower part of described second floor profile be provided with outward extending for the second of described two longerons assemblings outside extend installing plate, the opposite side bottom of described second floor profile be provided with the second installation groove and along the second inside bending in edge installing groove extend second in extend installing plate；Extend installing plate in the first of described first floor profile and be positioned on the second outer extension installing plate being adjacent described second floor profile connect, securing member is fixed through the outer installing plate that extends of the described first interior extension installing plate and second with described longeron, extend installing plate in the second of described second floor profile to be positioned on the first outer extension installing plate being adjacent described first floor profile connect, extend installing plate and the first outer extension installing plate in securing member traverse described second and described longeron is fixed。

Further, described second floor profile includes the second upper plate of be arrangeding in parallel and the second lower plate, vertically disposed second front side board and the second back side panel, interval are located at least one connecting plate between described second front side board and the second back side panel and are arranged between the second front side board and connecting plate and parallel with described second upper plate second install concave-board。

Further, described second upper plate, the second lower plate, the second front side board and the second back side panel area defined are separated at least two square area by described connecting plate。

Further, the top of the side of described first floor profile is provided with the first inner card cage caved inward, and the top of opposite side is provided with the first outwardly exterior bayonet slot；The top of the side of described second floor profile is provided with the second inner card cage caved inward, and the top of opposite side is provided with the second outwardly exterior bayonet slot；First inner card cage of described first floor profile and the second exterior bayonet slot being adjacent described second floor profile connect fasten, and the first exterior bayonet slot of described first floor profile and the second inner card cage being adjacent described second floor profile connect fasten。

Further, described front beam includes front beam body, be located on front beam body and the front bayonet slot of described floor phase clamping and along the outward extending front beam installation portion of described front beam body, and described front beam installation portion is fixed on the upper surface of described two longerons by securing member。

Further, described rear cross beam include rear cross beam body, be located on rear cross beam body to be provided with the bottom of the rear draw-in groove of described floor phase clamping, rear cross beam body after groove is installed and rear extension installing plate that the inside bending in edge along rear installation groove extends。

Further, the lower end of described rear cross beam is provided with two rear bumper installing plates downwardly extended。

Further, described side bar connector includes being connected fixing the first side bar fixed part with the side on described floor, the outside bending of end along described first side bar fixed part extends the first side bar connecting portion and the second side bar connecting portion that the end downward bending along described first side bar connecting portion extends；Described first side bar connecting portion and the second side bar connecting portion are fixed respectively at described side bar。

Further, described side bar connector also includes the second side bar fixed part being arranged on described second side bar connecting portion top and extending internally, and described second side bar fixed part is connected fixing with the lower surface on described floor。

Further, described second side bar fixed part has the side with described floor and is connected fixing fixing lug boss。

Further, described side bar is extrudate, described side bar include side bar body and with described this body by integral forming of side bar or be opened on described side bar body and have the auxiliary installation portion for installation auxiliary device。

Further, described auxiliary installation portion includes at least one installation portion for installing in euphroe, rope hook, plank and pitching pile。

Further, described side bar body has the chamber that integrated at least two is arranged side by side, the chamber in outside is by vertical plate and horizontal plate around forming, and described auxiliary installation portion includes spaced apart on the chamber in outside being provided with the pitching pile installation portion that multiple pitching pile hole is formed。

Further, the chamber of inner side is for electrically passing by line chamber。

Further, the second side bar installation portion that described side bar also includes the integrated first side bar installation portion inwardly horizontal-extending along described side bar body and the inner side along described side bar body vertically extends downwards。

Further, described auxiliary installation portion includes the one-body molded notch for boarding on described side bar body, and the end face of described notch and described side bar body is formed step-like。

Further, described side bar body inside horizontal-extending formation the first side bar installation portion, the two-stage that the end face of described first side bar installation portion, notch and described side bar body is formed from inside to outside is step-like。

Further, two euphroe draw-in grooves filling euphroe for card that described auxiliary installation portion includes the one-body molded lower end at described side bar body, is arranged side by side。

Further, there is between two described euphroe draw-in grooves the blend stop extended to the other side respectively。

Further, described auxiliary installation portion includes the spaced apart multiple rope hook installing holes being located at described side bar body lower end。

Further, described semitrailer also includes rear bumper, described rear bumper includes: two columns vertically be arrangeding in parallel and the crosspiece being horizontally installed on described column lower end, described rear bumper also includes two edge columns being arranged on the left and right sides, and two edge columns connect respectively at the two ends, left and right of described crosspiece。

Further, it is provided with side seal board between the column of the corresponding side of described edge column。

Further, described side seal board is provided with some horizontal reinforcements, and described reinforcement forms the mounting bracket of semitrailer taillight。

Further, the lateral surface of described edge column is arc transiting surface。

Further, described crosspiece cross section is hollow rectangular configuration。

Further, the top of described crosspiece is provided with the anti-skidding tongue raised up。

Further, the cross section of described column is I-shaped structure。

The longeron of a kind of semitrailer provided by the invention, by arranging described longeron by securing member by fixed-type for the assembling of each parts, decrease substantial amounts of welding job amount and avoid the mass defect that welding causes, fixing mass defect that welding brings and the higher problem of cost of labor is thoroughly avoided by adopting securing member to connect between parts, improve the product quality of semi-trailer longitudinal beam, decreasing the later stage for mass defect processes, and reduces cost of labor。

Accompanying drawing explanation

Fig. 1 is the structural representation of first embodiment of the longeron of a kind of semitrailer。

Fig. 2 is the part-structure schematic diagram of horizontal section view in Fig. 1。

Fig. 3 is the structural representation of right-hand stringer in Fig. 2。

Fig. 4 be in Fig. 3 D-D to sectional structure structure for amplifying schematic diagram。

Fig. 5 is the structure for amplifying schematic diagram of upper flange in Fig. 3。

Fig. 6 is the structure for amplifying schematic diagram in L region in Fig. 5。

Fig. 7 is the structure for amplifying schematic diagram of lower wing plate in Fig. 4。

Fig. 8 is the structural representation of second embodiment of the longeron of a kind of semitrailer。

Fig. 9 is the plan structure schematic diagram of Fig. 1。

Figure 10 is the longitudinal sectional structure schematic diagram after removing running gear in Fig. 1。

Figure 11 is the structural representation of the first embodiment on floor。

Figure 12 is the structure for amplifying schematic diagram of a-quadrant in Figure 11；

Figure 13 is the structure for amplifying schematic diagram of the first floor profile in Figure 12。

Figure 14 is that in Figure 12, the first floor profile amplifies structural representation with coordinating of positioning sliding block。

Figure 15 is the structural representation of the second embodiment on floor。

Figure 16 is the structure for amplifying schematic diagram in B region in Figure 16；

Figure 17 is the structure for amplifying schematic diagram of the second floor profile in Figure 16。

Figure 18 is the structure for amplifying schematic diagram at front beam place in Figure 10。

Figure 19 is the structure for amplifying schematic diagram of front beam in Figure 18。

Figure 20 is the structure for amplifying schematic diagram at Figure 10 middle and rear cross beam place。

Figure 21 is the structure for amplifying schematic diagram of Figure 20 middle and rear cross beam。

Figure 22 is the structure for amplifying schematic diagram at the side bar place on right side in Fig. 2。

Figure 23 is the structure for amplifying schematic diagram of side bar connector in Figure 22。

Figure 24 is the structure for amplifying schematic diagram of side bar in Figure 22。

Figure 25 is the structure for amplifying schematic diagram in C region in Figure 24。

Figure 26 is one section of perspective view of side bar in Figure 22。

Figure 27 is the structure for amplifying schematic diagram at the side bar place in left side in Fig. 2。

Figure 28 is that in Figure 20, the master of rear bumper looks structure for amplifying schematic diagram。

Figure 29 be in Figure 28 E-E to sectional structure schematic diagram。

Figure 30 is the structure for amplifying schematic diagram in H region in Figure 14。

Detailed description of the invention

For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described。

The present invention is when describing orientation, and with direction that semitrailer normally travels for front, the opposing party relative with front is rear, with near semitrailer cross section center position in, with the direction at the center away from semitrailer cross section for outward。

Referring to Fig. 1-Fig. 7, it is the structural representation of the first embodiment of the longeron of a kind of semitrailer, as it is shown in figure 1, semitrailer includes the compositions such as vehicle frame 100, traction assembly 200, supporting leg assembly 300, rear bumper 400 and running gear 500。Fig. 3 is the structural representation of the longeron on right side in Fig. 2。

As shown in Figure 3 and Figure 4, longeron 1 includes upper flange 11, lower wing plate 12, web 13 totally three parts between upper flange 11 and lower wing plate 12, by securing member 7 by fixed-type for three parts assemblings。Fixed by the assembling of securing member 7 between the parts of such longeron 1, avoid welding during longeron 1 molding, avoid because welding cause deformation, intensity reductions, mass defect etc., be conducive to improving the quality of longeron 1, and improve the manufacturing speed of longeron 1, reduction manufacturing cost。

In the present embodiment, upper flange 11 and lower wing plate 12 are all integrated extruded aluminium section bar, and longeron 1 is variable section structure, web 13 is aluminum alloy extrusion section bar, longeron 1 adopts aluminium alloy structure to advantageously reduce the deadweight of longeron 1 and appearance looks elegant, and cost of labor and the maintenance cost of manufacture are relatively low。Owing to have employed the assembling between parts, it is possible to web 13 is set to the lower male structure that arches up so that longeron 1 is also the lower male structure of arch after assembling molding, increases the bearing capacity of longeron 1, increases the compressive property of longeron。Wherein, securing member 7 is aluminium rivet and aluminum HUCK nail。

As Figure 4-Figure 7, upper flange 11 has upper flange body 111 and the upper flange installation portion 112 downwardly extended along upper flange body 111。Lower wing plate 12 has lower wing plate body 121 and along the upwardly extending lower wing plate installation portion 122 of lower wing plate body 121。Upper flange installation portion 112 is provided with the upper flange recess 113 that the upper end with web 13 matches, lower wing plate installation portion 122 is provided with the lower wing plate recess 123 that the bottom with web 13 matches。When longeron 1 assembles, the lower end of web 13 is positioned at lower wing plate recess 123 place, and utilizes securing member 7 web 13 and lower wing plate installation portion 122 to be fixed；The upper end of web 13 is positioned at upper flange recess 113 place, and utilizes securing member 7 web 13 and upper flange installation portion 112 to be fixed；So make longeron 1 fixed-type simply, upper flange recess 113 is set and lower wing plate recess 123 makes the installation of web 13 position simply, be conducive to improving the assembling speed of longeron 1；And being conducive to fixing between web 13 so that the stress performance after longeron 1 assembling is better。

In the present embodiment, as shown in Figure 5, the inner side of upper flange body 111 is partial to by web 13, namely upper flange body 111 has the first noumenon 1111 being positioned at inside upper flange installation portion 112 and is positioned at the second body 1112 outside upper flange installation portion 112, and the width of the first noumenon 111 is less than the width of the second body 1112。Namely wider by what the width of the second body 1112 was arranged, the distance that the outside of upper flange body 111 contacts with floor 4 is strengthened, add the longeron 1 support arm of force for floor 4, be conducive to improving longeron 1 for the support degree on floor 4, improve the stress performance on floor 4。

In the present embodiment, as shown in Figure 6, the upper surface of upper flange body 111 is plane, and lower surface has certain gradient, is so conducive to finite reduction deadweight and the minimizing cost of raw material under the premise meeting intensity。Concrete, the lower surface of the second body 1112 has certain gradient；The lower surface of the first noumenon 1111 is parallel with upper surface, offers a upper limb board slot 114 on the lower surface of the first noumenon 1111, it is simple to fixing of securing member 7。The lower surface of the second body 1112 includes the first plane 11122 and the second inclined-plane 11123 that the first inclined-plane 11121 is parallel with the upper surface of upper flange body 111 from outside to inside successively。First plane 11122 offers a upper flange stress groove 114。And the angle between the first inclined-plane 11121 and horizontal plane is set more than or equal to the angle between the second inclined-plane 11123 and horizontal plane；Angle between first inclined-plane 11121 and horizontal plane is 3-8 degree, angle namely and between horizontal plane is smaller, and in the lower surface arranging the first plane 11122 on the second body 1112 and the first noumenon 1111 is generally aligned in the same plane, securing member 7 is fixed in the first plane 11122, second inclined-plane 11123 is set and makes the thickness more than the first noumenon 1111 of the distance between the second inclined-plane 11123 and the upper surface of upper flange body 111, so increase the thickness inside the second body 1112, be conducive to increasing the intensity of the second body 1112, after guaranteeing to increase the support arm of force of the second body 1112, the increase of the intensity of the second body 1112 self, ensure that the powerful support for floor 4。

Shown in Figure 8, the structural representation of the second embodiment of the longeron of semitrailer, longeron 1 is by upper flange 11 and 12 two parts of lower wing plate, by securing member 7 by fixed-type for two parts assemblings。Fixed by the assembling of securing member 7 between the parts of such longeron 1, avoid welding during longeron 1 molding, avoid because welding cause deformation, intensity reductions, mass defect etc., be conducive to improving the quality of longeron 1, and improve the manufacturing speed of longeron 1, reduction manufacturing cost。

Upper flange 11 and lower wing plate 12 are all integrated extruded aluminium section bar, and upper flange 11 has upper flange body 111 and the upper flange installation portion 112 downwardly extended along upper flange body 111。Lower wing plate 12 has lower wing plate body 121 and along the upwardly extending lower wing plate installation portion 122 of lower wing plate body 121。Wherein lower wing plate installation portion 122 is vertical plate, is provided with and the recess on lower wing plate installation portion 122 on upper flange installation portion 112, and the top of lower wing plate installation portion 122 is positioned at recess, and is fixed by securing member 7。So making longeron 1 fixed-type simply, arrange recess when upper flange 11 and lower wing plate 12 are installed, it is simple to install location, is conducive to improving the assembling speed of longeron 1, and is conducive to increasing the stress performance after longeron 1 assembles。The median plane arranging upper flange installation portion 112 and lower wing plate installation portion 122 overlaps so that upper flange installation portion 112 is formed strong support by lower wing plate installation portion 122, increases the stress performance of longeron 1。

The following describes other structures of semitrailer in Fig. 1, as shown in Figure 9, vehicle frame 100 includes two longerons, 2, rear cross beam 3 of 1, front beam and the floor 4 of parallel longitudinal setting, wherein front beam 2 is vertically set on the front end of two longerons 1, rear cross beam 3 is vertically set on the rear end of two longerons 1, and front beam 2 and rear cross beam 3 are connected to the rear and front end on floor 4 respectively, fixing for assembly connection between floor 4 and two longerons 1, front beam 2 and rear cross beam 3 respectively and are fixed for assembly connection between two longerons。

In the present embodiment, fixing by adopting assembled to connect between parts, thoroughly avoid the mass defect brought of welding and the higher problem of cost of labor, concrete, as shown in figures 12 and 14, front beam 2 and rear cross beam 3 are connected to the rear and front end on floor 4 respectively, fix for assembly connection between floor 4 and two longerons 1, and front beam 2 and rear cross beam 3 respectively and are fixed for assembly connection between two longerons；Which reducing substantial amounts of welding job amount and avoid the mass defect that causes of welding, improve the product quality of semi-trailer frame, decreasing the later stage for mass defect processes, and reduces cost of labor。

In the present embodiment, vehicle frame 100 mainly adopts aluminium alloy extrusions to be assembled, and wherein longeron 1 and floor 4 are to be assembled by aluminium alloy extrusions, the aluminium alloy extrusions that front beam 2 and rear cross beam 3 are formed in one。Assembly connection is fixed as employing securing member and connects fixing or connect and fix, and securing member can adopt bolt, rivet, HUCK nail etc.。Adopting aluminium alloy extrusions also to make the deadweight of semi-trailer frame relatively light, appearance looks elegant, cost of labor and the maintenance cost of manufacture are relatively low。

As shown in Fig. 2, Fig. 9 and Figure 22, vehicle frame 100 also includes two side bars 5, and two side bars 5 are separately positioned on the left and right sides on floor 4, and two side bars 5, front beam 2 and rear cross beam 3 form the housing of vehicle frame；Side bar 5 is also adopted by the aluminium alloy extrusions that one is extruded, it is positioned at the assembly connection being easy to side bar 5, side bar connector 6 it is provided with between floor 4 and side bar 5, be specifically on floor 4, the left and right sides of front beam 2 and rear cross beam 3 be respectively welded coupling beam connector 6, side bar 5 is fixed on coupling beam connector 6 by securing member。The assembling being conducive to side bar 5 by arranging side bar connector 6 is fixed。The upper surface on floor 4, the upper surface of front beam 2, the upper surface of rear cross beam 3 and the upper surface of two side bars 5 form the loading platform of semi-trailer frame, form the upper surface of semi-trailer frame in other words。

In the present embodiment, vehicle frame 100, without running through crossbeam, omits in other words and runs through crossbeam, and the effect of cross-brace is played on floor 4, and floor 4 is made up of the many aluminium alloy extrusions at least with a chamber being laterally laid on two longerons 1。Floor 4 serves cross-brace effect, namely floor 4 is except playing floor effect, also act the effect of cross-brace, namely serve and run through horizontal beam action, also allow for semi-trailer frame to omit and run through crossbeam, thus avoid and on longeron 1, offer through hole and for running through the welding of crossbeam, avoid the reduction offering through hole for the intensity of longeron 1, and welding runs through the malformation of the longeron 1 that crossbeam causes, be conducive to the raising of product quality and the reduction of cost of labor。By being configured to profile material, at least there is a chamber so that the structure of section bar has bigger composite bending modulus, increase bearing capacity and the comprcssive strength on floor。

The structure on floor 4 being specifically described below, wherein represents that " interior " " outward " in orientation says relative to floor profile cross section itself, as shown in figures 11-14, for the first embodiment on floor 4, floor 4 is to be formed by a kind of floor profile clamping。

As shown in figure 11, floor 4 includes horizontal be laid on two longerons 1 many and at least has rectangular chamber first floor profile 41, and the first floor profile 41 is integrated extruded aluminium alloy extrusions。Mutual clamping between two adjacent first floor profiles 41。Making floor 4 form an entirety by mutual clamping, the first floor profile 41 is provided with interface arrangment, is provided with for fixing extension mounting plates structure in the both sides, front and back of lower end in the both sides, front and back of upper end；So be conducive to increasing the intensity on floor 4, and contribute to forming smooth floor upper surface。There is by arranging the first floor profile 41 chamber of rectangle so that the first floor profile 41 has a bigger composite bending modulus, and and contact area between longeron 1 relatively big, increase compressive property further。

For interface arrangment, as shown in Figure 12 and Figure 13, being provided with the first inner card cage 414 caved inward on the top of the side of the first floor profile 41, the top of opposite side is provided with the first exterior bayonet slot 415 that is outwardly and that match with the first inner card cage 414；When the first floor profile 41 is installed fixing, the first inner card cage 414 fastens with being adjacent the first exterior bayonet slot 415 connect。The top so making the first floor profile 41 connects and fixes mutually, increases the fixing fastness of assembling and planarization, and snap-action is simple, the time of less fixing operation。

As shown in Figure 12 and Figure 13, a side lower part at the first floor profile 41 is provided with outward extending for first outer extending installing plate 411 with longeron 1 assembles, the opposite side bottom of the first floor profile 41 be provided with the first installation groove 412 and extend along the first inside bending in edge installing groove 412 first in extension installing plate 413；When the first floor profile 41 is installed fixing, extend installing plate 413 in first and be superimposed upon the top being adjacent the connect first outer extension installing plate 411, securing member 7 extends installing plate 411 through the first interior extension and fixes with longeron 1 outside installing plate 413 and first, the first installation groove 412 is used for placing fixation fastener 7。So extend the superimposed fixing of installing plate 411 outside installing plate 413 and first by the first of two adjacent first floor profiles 41 the interior extension, when first floor profile 41 is fixed by securing member 7, two adjacent first floor profiles 41 are also secured on longeron 1, and the both sides, front and back making the first floor profile 41 are all fixed on longeron 1, increase the fastness between the first adjacent floor profile 41 and stability, strengthen the fastness of floor 4 entirety。

As shown in figure 13, in order to improve the assembling fixed speed of the first floor profile 41 further, also having flange 4111 upwards in the first outer end extending installing plate 411, flange 4111 is positioned at the outside of the first extension installing plate 413。Namely at the first floor profile 41 assembled, the first inner card cage 414 and the first exterior bayonet slot 415 clamping is passed through on top, bottom is by putting on the first outer extension installing plate 411 by the first interior installing plate 413 that extends, and it is positioned at inside flange 4111, so be conducive to extending in first the installation location of installing plate 413, improve assembling speed。

As shown in Figure 11, Figure 13 and Figure 14, fixing for the ease of the goods on floor 4, floor 4 also includes transversely movable positioning sliding block 43, and positioning sliding block 43 is arranged on the first floor profile 41；First floor profile 41 is provided with two parallel chutes 414 along the first floor profile 41 length direction, between two chutes 414, is provided with the dividing plate of T-shaped；The lower end of positioning sliding block 43 is provided with two claws matched with two chutes 414, and claw is positioned at chute 414。Positioning sliding block 43 can be set as needed on the first floor profile 41 so that the goods being on floor 4 is positioned at fore-and-aft direction。

As shown in figure 13, it is additionally provided with anti-skidding boss 416 protruding upward on the top of the first floor profile 41, increases the friction between floor 4 and the goods placed on it, increase the stability of goods。

In present embodiment, as shown in figure 14, first floor profile 41 includes the first upper plate 4171 of be arrangeding in parallel and the first lower plate 4172, vertically disposed first front side board the 4173, first back side panel 4174 and middle connecting plate 4175 and the installation concave-board 4176 parallel with the first upper plate 4171 and coulisse 4177, is wherein respectively equipped with two between coulisse 4177 two ends and middle connecting plate 4175 and tiltedly wins 4178 in succession。Namely the first floor profile 41 has three chambers surrounded, it is provided with arc 4179 between coulisse 4177 and the first upper plate 4171, chute 414 is exactly that the dividing plate of coulisse 4177, arc 4,179 first upper plate 4171 and T-shaped is around forming, in order to increase the support for chute 414, it is arranged on coulisse 4177 two ends to be respectively provided with and tiltedly win 4178 in succession, the width of coulisse 4177 is equal with the width of oblique connecting plate 4178, and the chamber namely forming equiangular triangle increases the support for chute 414。Distance between middle connecting plate 4175 with the first front side board 4172 and the first back side panel 4174 is equal。The first floor profile 41 is so made to have bigger intensity so that the bulk strength on floor 4 is bigger。

As shown in Figure 15-Figure 17, being the second embodiment on floor 4, floor 4 is to be replaced clamping by two kinds of floor profiles to form。

Concrete, laterally it is laid on the upper surface of two longerons 1 as it is shown in figure 9, floor 4 includes the first alternately arranged floor profile 41 and the second floor profile 42, the first floor profile 41 and the second floor profile 42。Mutual clamping between adjacent the first floor profile 41 and the second floor profile 42, the first floor profile 41 and the second floor profile 42 is made to form an entirety in top clamping, be conducive to increasing the intensity on floor 4, and contribute to forming smooth floor upper surface。Wherein the first floor profile 41 adopts the structure identical with the first embodiment, the second floor profile 42 is not provided with positioning sliding block 43, so makes the simple in construction of the second floor profile 42, it is possible to reduce the cost on floor。And the width of the second floor profile 42 is more than the width of the first floor profile 41, and what which reduce the first floor profile 41 makes consumption, is conducive to reducing further cost。

In the present embodiment mode, be also the first floor profile 41 and the second floor profile 42 on top by interface arrangment clamping, bottom is fixed by installing plate。

As shown in Figure 16 and Figure 17, first floor profile 41 and the second floor profile 42 are provided with for installing fixing installing plate in bottom, it is provided with in the side of the first floor profile 41 outward extending for extension installing plate 411 outer with the first of two longeron 1 assemblings, is provided with the first installation groove 412 in the opposite side bottom of the first floor profile 41 and extends installing plate 413 along the first of the first inside bending extension in edge installing groove 412；A side lower part at the second floor profile 42 is provided with outward extending for extension installing plate 421 outer with the second of two longeron 1 assemblings, is provided with the second installation groove 422 in the opposite side bottom of the second floor profile 42 and extends installing plate 423 along the second of the second inside bending extension in edge installing groove 422；When the first floor profile 41 and the second floor profile 42 are alternately installed, first floor profile 41 and the second adjacent floor profile 42 top clamping, in the first of bottom the first floor profile 41, extension installing plate 413 is positioned on the second outer extension installing plate 421 being adjacent the second floor profile 42 connect, and namely the first interior installing plate 413 that extends is superimposed upon outside second and extends installing plate 421；Securing member 7 is fixing with longeron 1 through the first interior extension installing plate 413 and the second outer installing plate 421 that extends；Extend installing plate 423 in the second of second floor profile 42 to be positioned on the first outer extension installing plate 411 being adjacent the first floor profile 41 connect, extend installing plate 423 and the first outer extension installing plate 411 in securing member 7 traverse second and longeron 1 is fixed。So superimposed fixing by the installing plate of the first adjacent floor profile 41 and the second floor profile 42, bottom between first floor profile 41 and the second floor profile 42 is fixed and fixing between the first floor profile 41 and the second floor profile 42 and longeron 1 simultaneously completes, and the both sides, front and back making the first floor profile 41 and the second floor profile 42 are all fixed on longeron 1, increase the fastness between the first floor profile 41 and the second floor profile 42 and stability, strengthen the fastness of floor 4 entirety。

Referring to shown in Figure 13 and Figure 17, the top of the side of the first floor profile 41 is provided with the first inner card cage 414 caved inward, and the top of opposite side is provided with the first outwardly exterior bayonet slot 415；The top of the side of the second floor profile 42 is provided with the second inner card cage 424 caved inward, and the top of opposite side is provided with the second outwardly exterior bayonet slot 425；When the first floor profile 41 and the second floor profile 42 are alternately installed, first inner card cage 414 of the first floor profile 41 and the second exterior bayonet slot 425 being adjacent the second floor profile 42 connect fasten, and the first exterior bayonet slot 415 of the first floor profile 41 and the second inner card cage 424 being adjacent the second floor profile 42 connect fasten。The top so making the first floor profile 41 and the second floor profile 42 connects and fixes mutually, increases the fixing fastness of assembling and planarization, and snap-action is simple, the time of less fixing operation。

In present embodiment, the second floor profile 42 includes the second upper plate 4271 and the second lower plate 4272, vertically disposed second front side board 4273 and the second back side panel 4274, three connecting plates 4275 being uniformly spaced apart between the second front side board 4273 and the second back side panel 4274 that be arranged in parallel and is arranged between the second front side board 4273 and connecting plate 4275 and parallel with the second upper plate 4271 second installs concave-board 4276。So make the second floor profile 42 have three square chambers and second and the chamber above groove 422 is installed。The second floor profile 42 is so made to have bigger composite bending modulus so that the bulk strength on floor 4 is bigger。

As shown in Figure 18-Figure 21, illustrate the structure of front beam 2 and rear cross beam 3 in the present embodiment, front beam 2 and rear cross beam 3 are all integrated extruded aluminium alloy extrusions, and front beam 2 includes front beam body 21, be located on front beam body 21 and the front bayonet slot 22 of floor 4 phase clamping and along the outwards horizontal-extending front beam installation portion 23 of front beam body 21；Front beam installation portion 23 superposes with the interior extension installing plate on floor 4, and is fixed on the upper surface of two longerons 1 by securing member 7。Namely the front beam body 21 of front beam 2 is positioned at the front end of longeron 1, and front beam installation portion 23 is positioned on longeron 1。

Rear cross beam 3 includes rear cross beam body 31, be located on rear cross beam body 31 be provided with the bottom of the rear draw-in groove 32 of floor 4 phase clamping, rear cross beam body 31 after groove 33 is installed and rear extension installing plate 34 that the inside bending in edge along rear installation groove 33 extends。Rear extension installing plate 34 superposes with the outer extension installing plate on floor 4, and is fixed on the upper surface of two longerons 1 by securing member 7。Rear cross beam body 31 is positioned at the rear end of longeron 1, and rear installation groove 33 and rear extension installing plate 34 are positioned on longeron 1。The lower end being assemblied in rear cross beam 3 for the ease of rear bumper is provided with two rear bumper installing plates 35 downwardly extended。

As shown in Figure 22-Figure 27, illustrate the structure of side bar connector 6 and side bar 5 in the present embodiment, side bar 5 and side bar connector 6 and be all integrated extruded aluminium alloy extrusions。

As shown in Figure 22 and Figure 23, side bar connector 6 includes being connected fixing the first side bar fixed part 61 with the side on floor 4, the outside bending of end along the first side bar fixed part 61 extends the first side bar connecting portion 62 and the second side bar connecting portion 63 that the end downward bending along the first side bar connecting portion 62 extends；Wherein the first side bar connecting portion 61 and the second side bar connecting portion 63 are fixed with being connected by securing member 7 between side bar 5 respectively, are provided with the side bar installation portion matched with the first side bar connecting portion 61 and the second side bar connecting portion 63 on side bar 5；The assembling being easy to side bar 7 by arranging side bar connector 6 is fixed。

In order to increase fastness fixing between side bar connector 6 and floor 4, side bar connector 6 also includes the second side bar fixed part 64 being arranged on the second side bar connecting portion 63 top and extending internally, and the lower surface on the second side bar fixed part 64 and floor 4 is welded and fixed；The side on the first side bar fixed part 61 and floor 4 is also welded and fixed。On the second side bar fixed part 64, the side having with floor 4 is connected fixing fixing lug boss 65, increases fastness fixing between side bar connector 6 and floor 4 further。

As shown in Figure 22, Figure 24-Figure 27, side bar 5 includes side bar body 51 and one-body molded with side bar body 51 or be opened on side bar body 51 and have the auxiliary installation portion for installation auxiliary device。Wherein auxiliary installation portion includes at least one installation portion for installing euphroe 10, rope hook 20, plank 30 and pitching pile etc.。Euphroe 10 for straining the rope of restraint of loads, fixing for rope of rope hook 20, plank 30 is arranged on semi-trailer frame, for fixing goods time reinforce nail, pitching pile is used for pitching pile, and flat car becomes van or side curtain car or breast board car etc.。This avoid welding between auxiliary installation portion and side bar 5, avoid the deformation of side bar 5 because welding auxiliary installation portion causes, intensity reduction and the impact etc. for car load outward appearance, be conducive to improving the quality of side bar, increase the intensity of side bar, and the packaging efficiency of raising car load, reduce production cost。

As shown in Figure 24 and Figure 26, side bar body 51 has the chamber that integrated at least two is arranged side by side, the present embodiment has three chambers, respectively the 3rd chamber 513 of first chamber 511 in outside, the second middle chamber 512 and inner side, wherein the first chamber 511 for by vertical plate and horizontal plate around forming square die cavity room；Auxiliary installation portion includes the spaced apart pitching pile installation portion being provided with the formation of multiple pitching pile hole 5111 on first chamber 511 in outside。On the upper plate of the first chamber 511, uniform intervals offers multiple pitching pile hole 5111；When pitching pile, the bottom of pitching pile enters the first chamber 511 through pitching pile hole 5111, and the cavity wall of the first chamber 511 plays the effect of fixing pitching pile。Second chamber 512 of inner side and the 3rd chamber 513 chamber are for electrically passing by line chamber。

As shown in figure 24, side bar 5 also includes the second side bar installation portion 53 vertically extended downwards along inwardly horizontal-extending the first side bar installation portion 52 of side bar body 51 and the inner side along side bar body 51, and the first side bar installation portion 52 and the second side bar installation portion 53 are mutually matched corresponding with the first side bar connecting portion 61 and the second side bar connecting portion 63 on side bar connector 6 and fix respectively。

As shown in figure 27, the first side bar installation portion 52 and the second side bar installation portion 53 are being fixed with side bar connector 6 by securing member 7, spaced apart on the first side bar installation portion 52 are provided with some through holes。Location during for forming through holes is convenient, offers the side bar groove 521 in edgewise beam length direction on the first side bar installation portion 52, and through hole is offered along side bar groove 521, improves the work efficiency of fluting。

As shown in figure 24, auxiliary installation portion also includes the one-body molded notch 54 for boarding 30 on side bar body 51, and the end face of notch 54 and side bar body 51 is formed step-like。The two-stage that the end face of the first side bar installation portion 52, notch 54 and side bar body 51 is formed from inside to outside is step-like。Plank 30 is installed in notch 54, and the inner side of plank 30 contacts with side bar connector 6。By arranging one-body molded notch 54 on side bar body 51 so that the manufacture of notch 54 is simple, reduces production cost。

Auxiliary installation portion includes two the euphroe draw-in grooves 55 filling euphroe 10 for card being arranged side by side in the lower end of side bar body 51, and euphroe draw-in groove 55 is one-body molded with side bar body 51, and euphroe 10 is provided with the clamp matched with euphroe draw-in groove 55。Increasing spacing for euphroe 10, have the blend stop 551 extended to the other side respectively between two euphroe draw-in grooves 55, what increase on the upside of euphroe 10 is spacing, it is ensured that euphroe 10 install after fastness。By arranging one-body molded euphroe draw-in groove 55 on side bar body 51 so that the installation of euphroe 10 is fixing simple, directly card fill just can, and avoid being welded and fixed for euphroe 10。

As shown in Figure 24 and Figure 27, auxiliary installation portion includes the spaced apart multiple rope hook installing holes 56 being located at side bar body 51 lower end, and in the present embodiment, rope hook installing hole 56 is opened on the lower end wall of the second chamber 512。By offering rope hook installing hole 56, it is to avoid being welded and fixed for rope hook 20。

As shown in Figure 24 and Figure 26, being respectively provided with outward extending guard strip 514 at upper and lower two ends, the outside of side bar body 51, the thickness of guard strip 514, more than the cavity wall of side bar body 51, is conducive to the protection for side bar 5 by arranging guard strip 514, and increases the intensity of side bar 5。The outer panel of side bar 51 is provided with the semicircular reinforcement 515 of outwardly convex, for increasing the intensity of outer panel。

As shown in Figure 20, Figure 28-Figure 30, illustrating to be positioned at the structure of the rear bumper 400 of vehicle frame 100 afterbody, rear bumper 400 passes through securing member 7 assembly connection on rear cross beam 3 and longeron 1。The lower end of rear cross beam 3 is provided with the rear bumper installing plate 35 downwardly extended, and the top of rear bumper 40 is fixed on rear bumper installing plate 35 by securing member 7。Rear bumper 400 is additionally provided with the strengthening support 408 for installing, and the front end of strengthening support 408 connects rear bumper 400 by securing member 7, the lower end by securing member 7 longitudinal beam connected 1, the upper end。Securing member 7 is bolt。

As shown in figure 28, rear bumper 400 includes 401, crosspiece 402 of two root posts and two edge columns 403, wherein, two root posts 401 vertically be arranged in parallel, crosspiece 402 is horizontally installed on the lower end of column 401, two edge columns 403 are arranged on the left and right sides of two root posts 401, and two edge columns 403 are respectively at the two ends, left and right of crosspiece 402；Namely edge column 403 is positioned at the left and right sides of bumper 400。

By increasing the edge column 403 being arranged on the left and right sides; strengthen the bulk strength of rear bumper; in particular so that the intensity of rear bumper 400 both sides is strengthened; crashworthiness strengthens; the problems such as deformation fracture occur during collision free; further enhance the safety of rear bumper 400, increase the rear bumper 400 protection for semitrailer。

In order to increase the bulk strength of rear bumper 400 further, between the column 401 of the corresponding side of edge column 403, it is provided with side seal board 404, is namely provided with two pieces of side seal boards 404；Being provided with license plate 405 between two root posts 401, the license plate fixing of semitrailer fixes in license plate 405。Rear bumper 400 is made to form an enclosed construction by arranging side seal board 404, the entirety of close-connected between each parts, mutual support, further enhancing the intensity of rear bumper 400。

In the present embodiment, side seal board 404 is provided with some horizontal reinforcements 4041, increases the intensity of side seal board 404 and effective reinforcement column 401, bonding strength between crosspiece 402 and edge column 403；Arrange reinforcement 4041 can as the mounting bracket of taillight simultaneously, it is not necessary to additionally increase lamp support, it is achieved good looking appearance, and reduces material cost, saves the time installing lamp bracket so that production cost reduces。

As shown in figure 29, the lateral surface of two edge columns 403 is arc transiting surface 4031, namely from the arcwall face of the front end face of edge column 403 transition to back end。By arranging arc transiting surface 4031, when side collision occurs, damaged in collision can be alleviated, more safe and reliable, effectively strengthen the security reliability of rear bumper 400。

As shown in figure 29, crosspiece 402 is the aluminium section bar with rectangular chamber, and its cross section is hollow square structure in other words。Such crosspiece 402 has higher composite bending modulus in vehicle forward direction, has higher composite bending modulus in cross-wise direction in other words；The whole upper surface area of crosspiece 402 is relatively big simultaneously, and crosspiece 402 is set to hollow-core construction, ensureing effectively to reduce on sufficient intensity basis rear bumper weight, has saved material simultaneously。

In the present embodiment, the upper surface of crosspiece 402 is provided with some anti-skidding tongues 4021 raised up, the wider width in the longitudinal direction of crosspiece 402 is set, the intensity of crosspiece 402 can be increased on the one hand, on the other hand can so that crosspiece 402 be provided with the function of pedal, meet the requirement conveniently got on or off the bus, convenient safety；And avoid and pedal is set specially, reduce production cost further。

The foregoing is only the preferably possible embodiments of the present invention, not limit the scope of the invention, the equivalent structure change done by all utilizations description of the present invention and accompanying drawing content, it is all contained in protection scope of the present invention。

Claims (10)

1. a longeron for semitrailer, described longeron at least includes upper flange and two parts of lower wing plate, it is characterised in that each parts are assembled fixed-type by securing member by described longeron。

2. longeron according to claim 1, it is characterised in that described upper flange and lower wing plate are section bar, described upper flange has upper flange body and the upper flange installation portion downwardly extended along upper flange body；Described lower wing plate has lower wing plate body and along the upwardly extending lower wing plate installation portion of lower wing plate body。

3. longeron according to claim 2, it is characterized in that, one of them of described upper flange installation portion and lower wing plate installation portion is vertical plate, the end of the other in which of described upper flange installation portion and lower wing plate installation portion is provided with the wing plate recess matched with vertical plate, and described vertical plate is positioned at described recess。

4. longeron according to claim 2, it is characterised in that described longeron also includes the web between described upper flange and lower wing plate, the both ends up and down of described web connect by securing member is fixing respectively at described upper flange and lower wing plate。

5. longeron according to claim 4, it is characterised in that described upper flange installation portion is provided with the upper flange recess that the upper end with described web matches, and described lower wing plate installation portion is provided with the lower wing plate recess that the bottom with described web matches。

6. the longeron according to any one of claim 2 to 5, it is characterized in that, described upper flange body has the first noumenon being positioned at inside described upper flange installation portion and is positioned at the second body outside described upper flange installation portion, and the width of described the first noumenon is less than the width of described second body。

7. longeron according to claim 6, it is characterised in that the lower surface of described second body includes the first inclined-plane first plane parallel with the upper surface of upper flange body and the second inclined-plane from outside to inside successively。

8. longeron according to claim 7, it is characterised in that the angle between described first inclined-plane and horizontal plane is more than or equal to the angle between described second inclined-plane and horizontal plane。

9. the longeron according to claim 7 or 8, it is characterised in that in the lower surface of the first plane on described second body and described the first noumenon is generally aligned in the same plane。

10. a semitrailer, it is characterised in that described semitrailer has the parallel longitudinal longeron arranged described in two any one of claim 1 to 9。