CN105691458B - A kind of assembled semi-trailer frame, semitrailer and assembly method - Google Patents

Abstract

The present invention provides a kind of assembled semi-trailer frame, semitrailer and assembly method, the vehicle frame includes two longerons, a front beam, a rear cross beam and the floor of parallel longitudinal setting, the front beam and rear cross beam are respectively engaged with the rear and front end on the floor, fixed between the floor and two longerons for assembly connection, the front beam and rear cross beam are fixed between two longerons for assembly connection respectively.By setting front beam and rear cross beam to be respectively engaged with the rear and front end on floor, fixed between floor and two longerons for assembly connection, the front beam and rear cross beam are fixed between two longerons for assembly connection respectively, reduce substantial amounts of welding job amount and avoid mass defect caused by welding, by between component using assembled connection it is fixed thoroughly avoid welded bands come mass defect and problem with high labor costs, improve the product quality of semi-trailer frame, reduce the post-processing for mass defect, reduce cost of labor.

Description

A kind of assembled semi-trailer frame, semitrailer and assembly method

Technical field

The invention belongs to semitrailer technical field, and in particular to a kind of assembled semi-trailer frame, have the semitrailer car The semitrailer of frame and the assembly method of semitrailer.

Background technology

Platform semi-trailer vehicle frame includes two parallel longitudinal setting longerons, two side bars parallel with the longeron, one at present Transverse weld the front beams of two longerons and two side bar front ends, a transverse weld two longerons and both sides rear end back end beam, more Root is between front beam and back end beam and lateral separation is welded on two longerons and runs through crossbeam and panel.Longeron is mostly Dies being welded, and Chuan Liang holes are provided with longeron, left and right side bar is connected to through the crossbeam beam hole that wears long, preceding End carriage, back end beam and two side bars are welded to each other the outline border that connection surrounds tablet body frame, and checkered steel plate finally is welded on bottom On frame.

Platform semi-trailer frame materials mainly use Q345 or Q235 mild steel at present, are consolidated between each component by welding It is scheduled on together so that welding capacity is larger, and labor intensity is very big, and work efficiency is low；And welding deformation, rosin joint, solder skip, splashing etc. Weld defect is difficult to control, and the post-processing expenditure of time of weld defect is more, causes to manufacture cost and cost of labor phase It should increase；And it is relatively heavy using the dead weight of steel semitrailer, undoubtedly increase use cost；In addition, steel and welding bead table The easy corrosion in face, the whole service life for greatly reducing semitrailer are shorter.

The content of the invention

The present invention provides a kind of assembled semi-trailer frame, is fixed, avoided by the assembly connection between critical piece Substantial amounts of welding, improves the workmanship of semi-trailer frame, reduces cost of labor.

To reach above-mentioned technical purpose, the present invention is realized using following technical scheme：

A kind of assembled semi-trailer frame, including two longerons of parallel longitudinal setting, a front beam, a rear cross beam and Floor, the front beam are vertically set on the front end of two longerons, and the rear cross beam is vertically set on the rear end of two longerons, before described Crossbeam and rear cross beam are respectively engaged with the rear and front end on the floor, are fixed between the floor and two longerons for assembly connection, The front beam and rear cross beam are fixed between two longerons for assembly connection respectively.

Further, the floor is at least had by more being laterally laid on two longerons and playing the role of cross-brace The section bar for having a chamber is formed by connecting.

Further, the vehicle frame further includes two side bars, and two side bars are separately positioned at left and right sides of the floor, describedly Plate, front beam, the upper surface of rear cross beam and two side bars form loading platform.

Further, the assembly connection is fixed as being fixedly connected by fastener.

Further, side bar connector, the side are provided between the side bar and the floor, front beam and rear cross beam Fixed between beam and side bar connector for assembly connection.

Further, the floor includes laterally being laid on more first floor profiles on two longerons, and adjacent two Mutually it is clamped between first floor profile described in root.

Further, first floor profile has at least one chamber.

Further, a side lower part of first floor profile is equipped with outwardly extending be used for and longeron assembling Extension installing plate outside first, another side lower part of first floor profile are equipped with the first installation groove and along the first installation grooves Edge inside bending extension first in extension installing plate；In described first extension installing plate be superimposed upon it is adjacent thereto connect the Extend the top of installing plate outside one, fastener, which passes through, to be extended extension installing plate outside installing plate and first and indulged with described in first Beam is fixed.

Further, the described first end for extending installing plate outside also has upward flange, and the flange is positioned at described The outside of extension installing plate in first.

Further, the top of the side of first floor profile is equipped with the first inner card cage being recessed inwardly, opposite side Top be equipped with outwardly and the first exterior bayonet slot for matching with first inner card cage；First inner card cage with Its first adjacent exterior bayonet slot fastens.

Further, first floor profile is equipped with parallel along two of the first floor profile length direction Sliding slot, the partition plate of T-shaped is provided between two sliding slots.

Further, the floor further includes transversely movable positioning sliding block, the lower end of the positioning sliding block be equipped with Two claws that two sliding slots match, the claw are located in the sliding slot.

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

Further, first floor profile includes the first upper plate for being arranged 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 groove plate and coulisse parallel with first upper plate, it is described Two oblique connecting plates are respectively equipped between coulisse both ends and middle connecting plate.

Further, arc panel is equipped between the coulisse and the first upper plate.

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

Further, the width of the coulisse is equal with the width of the tiltedly connecting plate.

Further, the floor includes the first floor profile and the second floor profile being alternately arranged, adjacent institute State and be mutually clamped between the first floor profile and the second floor profile, the width of second floor profile is more than first ground The width of profile material.

Further, first floor profile and the second floor profile are laterally laid on the upper surface of two longeron On.

Further, the side of first floor profile be equipped with it is outwardly extending be used for two longeron assembling the Extension installing plate outside one, another side lower part of first floor profile are equipped with the first installation groove and along the first installation grooves Extension installing plate in the first of the inside bending extension in edge；One side lower part of second floor profile is equipped with outwardly extending use In extending installing plate outside second assembled with two longeron, another side lower part of second floor profile is equipped with the second installation Groove and along the second installation groove edge inside bending extension second in extension installing plate；The of first floor profile Extension installing plate is located at outside the second of second floor profile adjacent thereto connect on extension installing plate in one, and fastener passes through Extension installing plate is fixed with the longeron outside extension installing plate and second in described first, second floor profile second in Extension installing plate is located at outside the first of first floor profile adjacent thereto connect on extension installing plate, and fastener is described in Extension installing plate is fixed with the longeron outside extension installing plate and first in second.

Further, second floor profile includes the second upper plate for being arranged 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 connection between second front side board and the second back side panel Plate and it is arranged on the second installation groove plate between the second front side board and connecting plate and parallel with second upper plate.

Further, the connecting plate is enclosed second upper plate, the second lower plate, the second front side board and the second back side panel Into region be separated at least two square areas.

Further, the top of the side of first floor profile is equipped with the first inner card cage being recessed inwardly, opposite side Top be equipped with the first outwardly exterior bayonet slot；The top of the side of second floor profile is equipped with second to be recessed inwardly Inner card cage, the top of opposite side are equipped with the second outwardly exterior bayonet slot；First inner card cage of first floor profile with Second exterior bayonet slot of its adjacent second floor profile fastens, the first exterior bayonet slot of first floor profile with Second inner card cage of its adjacent second floor profile fastens.

Further, the front beam includes front beam body, is located at what is be mutually clamped with the floor on front beam body Front bayonet slot and pass through fastener along the outwardly extending front beam mounting portion of the front beam body, the front beam mounting portion It is fixed on the upper surface of two longeron.

Further, the rear cross beam includes rear cross beam body, is located at what is be mutually clamped with the floor on rear cross beam body After card slot, the lower part of rear cross beam body are equipped with rear installation groove and extend along the inside bending in edge of rear installation groove afterwards Extend installing plate.

Further, the lower end of the rear cross beam is equipped with two rear bumper installing plates extended downwardly.

Further, the side bar connector include be connected with the side on the floor the first fixed side bar fixed part, Connected along the first side bar connecting portion of the outside bending extension in the end of the first side bar fixed part and along first side bar Second side bar connecting portion of the end downward bending extension in portion；The first side bar connecting portion and the second side bar connecting portion respectively at The side bar is fixed.

Further, the side bar connector, which further includes, is arranged on the second side bar connecting portion top and extends internally The second side bar fixed part, the second side bar fixed part is connected fixation with the lower surface on the floor.

Further, there is the fixing lug boss that fixation is connected with the side on the floor on the second side bar fixed part.

Further, the side bar is extrudate, the side bar include side bar body and with the side bar body one It is body formed or be opened in the auxiliary mounting portion that installation auxiliary device is useful on the side bar body.

Further, the auxiliary mounting portion includes being used to install at least one in euphroe, rope hook, plank and pitching pile Mounting portion.

Further, the side bar body has integrally formed at least two chambers being arranged side by side, the chamber in outside By vertical plate and level board around forming, the auxiliary mounting portion, which is included in be spaced apart on the chamber in outside, is equipped with multiple pitching pile holes The pitching pile mounting portion of formation.

Further, the chamber of inner side is electrically to pass by line chamber.

Further, the side bar further includes integrally formed along inside the first horizontal-extending side bar of the side bar body Mounting portion and the second side bar mounting portion extended vertically downwards along the inner side of the side bar body.

Further, the auxiliary mounting portion includes being integrally formed the groove for being used for boarding on the side bar body The top surface of mouth, the notch and the side bar body forms step-like.

Further, the side bar body inwardly install by the first side bar mounting portion of horizontal-extending formation, first side bar The top surface in portion, notch and the side bar body forms two-stage step shape from inside to outside.

Further, it is described auxiliary mounting portion include be integrally formed the lower end of the side bar body, be arranged side by side two A euphroe card slot for being used to clamp euphroe.

Further, there is the blend stop extended respectively to other side between two euphroe card slots.

Further, the auxiliary mounting portion includes multiple rope hooks installation that interval is opened in the side bar body lower end Hole.

Further, the outside upper and lower ends of the side bar body have outwardly extending guard strip respectively.

Further, the outer panel of the side bar is equipped with the semicircular reinforcing rib of outwardly convex.

Further, the longeron includes at least two components of upper flange and lower wing plate, and the longeron will by fastener Each component assembling is fixed-type.

Further, the upper flange is integrated extrusion forming, and the upper flange has upper flange body and along upper flange The upper flange mounting portion that body extends downwardly.

Further, the lower wing plate is integrated extrusion forming, and the lower wing plate has lower wing plate body and along lower wing plate The lower wing plate mounting portion that body upwardly extends.

Further, one of them of the upper flange mounting portion and lower wing plate mounting portion are vertical plate, the upper flange The end of the other in which of mounting portion and lower wing plate mounting portion is equipped with the wing plate recess to match with vertical plate, the vertical plate In the recess.

Further, the median plane of the upper flange mounting portion and lower wing plate mounting portion overlaps.

Further, the longeron further includes the web between the upper flange and lower wing plate, the web it is upper Lower both ends are fixedly connected respectively at the upper flange with lower wing plate by fastener.

Further, the upper flange mounting portion is equipped with the upper flange recess to match with the upper end of the web, The lower wing plate mounting portion is equipped with the lower wing plate recess to match with the bottom of the web.

Further, the upper flange body is with the first noumenon on the inside of the upper flange mounting portion and positioned at institute The second body on the outside of upper flange mounting portion is stated, the width of the first noumenon is less than the width of second body.

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

Further, the angle between first inclined-plane and horizontal plane is more than or equal to second inclined-plane and level Angle between face.

Further, the first plane on second body and the lower surface of the first noumenon are generally aligned in the same plane It is interior.

Based on above-mentioned assembled semi-trailer frame, the present invention also provides a kind of semitrailer, has above-mentioned assembled half Trailer type frame for use in vehicle.

Further, the semitrailer further includes rear bumper, and the rear bumper is fixed on described using assembly connection The afterbody of vehicle frame.

Further, the rear bumper includes：Two columns that are vertically arranged in parallel and it is horizontally installed under the column One crosspiece at end, the rear bumper further include two edge columns for being arranged on the left and right sides, and two edge columns are respectively at the crosspiece Left and right ends connection.

Further, it is equipped with side seal board between the column of the corresponding side of the edge column.

Further, the side seal board is equipped with some horizontal reinforcing ribs, and the reinforcing rib forms semi-mounted tail-light Mounting bracket.

Further, the lateral surface of the edge column is arc transiting surface.

Further, the crosspiece section is hollow rectangular configuration.

Further, the top of the crosspiece is equipped with the anti-skidding tongue to raise up.

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

Based on above-mentioned assembled semi-trailer frame, the present invention also provides a kind of assembly method of semitrailer, the semi-mounted Car further includes traction assembly and rear bumper, the assembly method specifically include following step：

A, the traction assembly is fixed with two longeron assembly connections；

B, it will be mutually clamped between the front beam, floor, rear cross beam and the longeron be fastened on by fastener On；

Both sides beam connection is respectively welded to the left and right sides of the front beam, floor and rear cross beam C,；

D, two side bars are fastened on the beam connection of both sides by fastener respectively；

E, rear bumper is fastened on the rear cross beam and longeron by fastener.

A kind of assembled semi-trailer frame provided by the invention, by setting front beam and rear cross beam to be respectively engaged with floor Rear and front end, fixed between floor and two longerons for assembly connection, the front beam and rear cross beam are respectively between two longerons Fixed for assembly connection, reduce substantial amounts of welding job amount and avoid welding caused by mass defect, by component it Between using assembled connection is fixed thoroughly avoid mass defect and the problem with high labor costs that welded bands are come, improve partly The product quality of Trailer type frame for use in vehicle, reduces the post-processing for mass defect, reduces cost of labor.

Brief description of the drawings

Fig. 1 is the structure diagram of one embodiment of assembled semi-trailer frame.

Fig. 2 is the overlooking the structure diagram of Fig. 1.

Fig. 3 is that longitudinal schematic cross-sectional view after running gear is removed in Fig. 1.

Fig. 4 is the part-structure schematic diagram of horizontal section view in Fig. 1.

Fig. 5 is the structure diagram of the first embodiment on floor.

Fig. 6 is the enlarged structure schematic diagram of a-quadrant in Fig. 5；

Fig. 7 is the enlarged structure schematic diagram of the first floor profile in Fig. 5.

Fig. 8 is the cooperation enlarged structure schematic diagram of the first floor profile and positioning sliding block in Fig. 5.

Fig. 9 is the structure diagram of second of embodiment on floor.

Figure 10 is the enlarged structure schematic diagram of B area in Fig. 9；

Figure 11 is the enlarged structure schematic diagram of the second floor profile in Fig. 9.

Figure 12 is the enlarged structure schematic diagram at front beam in Fig. 3.

Figure 13 is the enlarged structure schematic diagram of front beam in Figure 12.

Figure 14 is the enlarged structure schematic diagram at Fig. 3 middle and rear cross beams.

Figure 15 is the enlarged structure schematic diagram of Figure 14 middle and rear cross beams.

Figure 16 is the enlarged structure schematic diagram at the side bar on right side in Fig. 4.

Figure 17 is the enlarged structure schematic diagram of side bar connector in Figure 16.

Figure 18 is the enlarged structure schematic diagram of side bar in Figure 16.

Figure 19 is the enlarged structure schematic diagram in C regions in Figure 18.

Figure 20 is one section of dimensional structure diagram of side bar in Figure 16.

Figure 21 is the enlarged structure schematic diagram at the side bar in left side in Fig. 4.

Figure 22 is the first embodiment structure diagram of longeron.

Figure 23 be in Figure 22 D-D to sectional structure enlarged structure schematic diagram.

Figure 24 is the enlarged structure schematic diagram of upper flange in Figure 23.

Figure 25 is the enlarged structure schematic diagram in L regions in Figure 24.

Figure 26 is the enlarged structure schematic diagram of lower wing plate in Figure 23.

Figure 27 is second of embodiment structure diagram of longeron.

Figure 28 is the main view enlarged structure schematic diagram of rear bumper in Figure 14.

Figure 29 be Figure 28 in E-E to schematic cross-sectional view.

Figure 30 is the enlarged structure schematic diagram in H regions in Figure 14.

Embodiment

To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described.

The present invention when describing orientation, using the direction of semitrailer normally travel as front, the opposing party opposite using front as Rear, the direction using the longitudinal centre line close to semi-trailer frame is interior, with the side of the longitudinal centre line away from semi-trailer frame To be outer.

It is a kind of half in the present embodiment as shown in Figure 1 for one embodiment of assembled semi-trailing car frame referring to Fig. 1-Figure 30 The structure diagram of trailer, semitrailer include assembled semi-trailer frame 100, traction assembly 200, supporting leg assembly 300, rear insurance Thick stick 400 and running gear 500 etc. form.

Shown in Figure 2, assembled semi-trailer frame 100 includes two longerons, 1, front beam of parallel longitudinal setting 2nd, a rear cross beam 3 and floor 4, wherein front beam 2 are vertically set on the front end of two longerons 1, and rear cross beam 3 is vertically arranged In the rear end of two longerons 1, and front beam 2 and rear cross beam 3 are respectively engaged with the rear and front end on floor 4, and floor 4 and two indulge Fixed between beam for assembly connection, front beam 2 and rear cross beam 3 are fixed between two longerons for assembly connection respectively.

In the present embodiment, by using assembled connection to fix between component, thoroughly avoid the quality that welded bands are come and lack Sunken and problem with high labor costs, specifically, as shown in figures 12 and 14, front beam 2 and rear cross beam 3 are respectively engaged with floor 4 rear and front end, is fixed between floor 4 and two longerons 1 for assembly connection, front beam 2 and rear cross beam 3 respectively with two longerons Between fixed for assembly connection；So reduce substantial amounts of welding job amount and avoid welding caused by mass defect, carry The high product quality of semi-trailer frame, reduces the post-processing for mass defect, reduces cost of labor.

In the present embodiment, vehicle frame 100 is mainly assembled using aluminium alloy extrusions, and wherein longeron 1 and floor 4 is closed by aluminium Metal type material is assembled, the aluminium alloy extrusions that front beam 2 and rear cross beam 3 are integrally formed.Assembly connection is fixed as using fastening Part connection is fixed or connects and fixes, and fastener can use bolt, rivet, HUCK nails etc..Also cause half using aluminium alloy extrusions The dead weight of Trailer type frame for use in vehicle is lighter, appearance looks elegant, and the cost of labor and maintenance cost of manufacture are relatively low.

As shown in Fig. 2, Fig. 4 and Figure 16, vehicle frame 100 further includes two side bars 5, and two side bars 5 are separately positioned on floor 4 The left and right sides, two side bars 5, front beam 2 and rear cross beam 3 form the outline border of vehicle frame；Side bar 5 is also using the aluminium of integral extrusion forming Alloy profile, positioned at the assembly connection easy to side bar 5, is provided with side bar connector 6, specifically between floor 4 and side bar 5 It is that coupling beam connector 6 is respectively welded in the left and right sides on floor 4, front beam 2 and rear cross beam 3, side bar 5 is fixed by fastener On coupling beam connector 6.Fixed by the assembling for setting side bar connector 6 to be conducive to side bar 5.The upper surface on floor 4, front beam The upper surface of 2 upper surface, the upper surface of rear cross beam 3 and two side bars 5 forms the loading platform of semi-trailer frame, in other words Form the upper surface of semi-trailer frame.

In the present embodiment, vehicle frame 100 omits run through crossbeam in other words, the work of cross-brace is played on floor 4 without through crossbeam With floor 4 is made of the more at least aluminium alloy extrusions with a chamber being laterally laid on two longerons 1.Rise on floor 4 Cross-brace effect has been arrived, that is, floor 4 also acts the effect of cross-brace in addition to playing the role of floor, that is, Play and run through horizontal beam action, also allow for semi-trailer frame and can be omitted through crossbeam, so avoid on longeron 1 Open up through hole and for the welding through crossbeam, avoid the reduction for opening up through hole for the intensity of longeron 1, and Welding is conducive to the raising of product quality, and the reduction of cost of labor through the malformation of longeron 1 caused by crossbeam.It is logical Crossing setting floor profile at least has a chamber so that the structure of section bar has larger composite bending modulus, increases holding for floor Loading capability and compression strength.

The structure on floor 4 is specifically described below, wherein " interior " " outer " that represents orientation is relative to floor profile section sheet What body was said, be the first embodiment on floor 4 as shown in Figure 5-Figure 8, floor 4 is formed by a kind of clamping of floor profile.

Specifically, as shown in figure 5, floor 4, which includes horizontal more be laid on two longerons 1, at least has a rectangle The first floor profile of chamber 41, the first floor profile 41 are integrated the aluminium alloy extrusions of extrusion forming.Adjacent two first Mutually it is clamped between floor profile 41.An entirety is formed by being mutually clamped floor 4, the first floor profile 41 is in upper end Front and rear sides be provided with interface arrangment, be provided with the front and rear sides of lower end for fixed extension mounting plates structure；So Be conducive to increase the intensity on floor 4, and help to form smooth floor upper surface.By setting the first floor profile 41 to have Have the chamber of rectangle so that the first floor profile 41 has a larger composite bending modulus, and the contact area between longeron 1 compared with Greatly, compressive property is further increased.

For interface arrangment, as shown in Figure 6 and Figure 7, it is equipped with and is recessed inwardly on the top of the side of the first floor profile 41 The first inner card cage 414, the top of opposite side is equipped with the first wild card that is outwardly and matching with the first inner card cage 414 Groove 415；When the first floor profile 41 installs fixed, the first inner card cage 414 and the first exterior bayonet slot 415 phase card adjacent thereto connect Close.So so that the top of the first floor profile 41 mutually connects and fixes, the fixed fastness of increase assembling and planarization, and Snap-action is simple, the time of less fixed operation.

As shown in Figure 6 and Figure 7, it is used to fill with longeron 1 equipped with outwardly extending in a side lower part of the first floor profile 41 Extend installing plate 411 outside first matched somebody with somebody, the first installation groove 412 is equipped with and along the in another side lower part of the first floor profile 41 Extension installing plate 413 in the first of the inside bending extension in edge of one installation groove 412；Install and fix in the first floor profile 41 When, in first extension installing plate 413 be superimposed upon it is adjacent thereto connect first outside extend the top of installing plate 411, fastener 7 passes through Extend installing plate 411 outside extension installing plate 413 and first in first and fixed with longeron 1, the first installation groove 412 is used to put Put fixation fastener 7.Outside so by the first interior extension installing plate 413 and first of two adjacent first floor profiles 41 Being stacked for installing plate 411 of extension is fixed so that when the first floor profile 41 is fixed by fastener 7, by adjacent two First floor profile 41 is also secured on longeron 1, and causes the front and rear sides of the first floor profile 41 to be all fixed on longeron 1 On, increase the fastness and stability between the first adjacent floor profile 41,4 overall fastness of enhancing floor.

As shown in fig. 7, in order to further improve the assembling fixed speed of the first floor profile 41, extend installation outside first The end of plate 411 also has upward flange 4111, the outside of the extension installing plate 413 in first of flange 4111.Namely In 41 assembled of the first floor profile, top is clamped by the first inner card cage 414 and the first exterior bayonet slot 415, and lower part is by by Extension installing plate 413 is put into outside first on extension installing plate 411 in one, and positioned at the inner side of flange 4111, is so conducive to first The installation positioning of interior extension installing plate 413, improves assembling speed.

As shown in Fig. 5, Fig. 7 and Fig. 8, for the ease of the fixation of the cargo on floor 4, floor 4 further includes can transverse shifting Positioning sliding block 43, positioning sliding block 43 be installed on the first floor profile 41 on；It is equipped with the first floor profile 41 along the first ground Two parallel sliding slots 414 of 41 length direction of profile material, the partition plate of T-shaped is provided between two sliding slots 414；Positioning sliding block 43 Lower end be equipped with two claws matching with two sliding slots 414, claw is located in sliding slot 414.Can be as needed first Positioning sliding block 43 is set on floor profile 41 so that the cargo on floor 4 is positioned in anteroposterior direction.

As shown in fig. 7, being additionally provided with anti-skidding boss 416 protruding upward on the top of the first floor profile 41, increase floor 4 With the friction between the cargo placed thereon, increase the stability of cargo.

In present embodiment, as shown in figure 8, the first floor profile 41 includes the first upper plate 4171 and first being arranged in parallel Lower plate 4172, vertically disposed first front side board 4173, the first back side panel 4174 and middle connecting plate 4175 and with the first upper plate 4171 parallel installation groove plates 4176 and coulisse 4177, wherein set respectively between 4177 both ends of coulisse and middle connecting plate 4175 There are two tiltedly to win 4178 in succession.Namely the first floor profile 41 has three chambers surrounded, 4177 and first upper plate of coulisse Arc panel 4179 is equipped between 4171, sliding slot 414 is exactly to have coulisse 4177,4,179 first upper plate 4171 of arc panel and T-shaped Partition plate is around forming, and in order to increase the support for sliding slot 414, is arranged on 4177 both ends of coulisse and sets respectively and tiltedly win in succession 4178, the width of coulisse 4177 is equal with the width of oblique connecting plate 4178, that is, forms the chamber increase pair of equiangular triangle In the support of sliding slot 414.Middle connecting plate 4175 is equal with the distance between the first front side board 4172 and the first back side panel 4174.So So that the first floor profile 41 has larger intensity so that the integral strength on floor 4 is larger.

As Figure 9-Figure 11, it is second of embodiment on floor 4, floor 4 is alternately clamped by two kinds of floor profiles Form.

Specifically, as shown in figure 9, floor 4 includes the first floor profile 41 and the second floor profile 42 that are alternately arranged, the One floor profile 41 and the second floor profile 42 are laterally laid on the upper surface of two longerons 1.The first adjacent floor profile 41 and second are mutually clamped between floor profile 42, are clamped on top so that 42 shape of the first floor profile 41 and the second floor profile Into an entirety, be conducive to increase the intensity on floor 4, and help to form smooth floor upper surface.Wherein the first floor Section bar 41 uses the structure identical with the first embodiment, is not provided with positioning sliding block 43 on the second floor profile 42, so makes It is simple to obtain the structure of the second floor profile 42, the cost on floor can be reduced.And the width of the second floor profile 42 is more than the The width of one floor profile 41, so reduces the usage amount of the first floor profile 41, is conducive to further reduce the cost.

In the present embodiment mode, and the first floor profile 41 and the second floor profile 42 pass through interface arrangment card on top Connect, lower part is fixed by installing plate.

As shown in Figure 10 and Figure 11, the first floor profile 41 and the second floor profile 42 are provided with solid for installing in lower part Fixed installing plate, outwardly extending be used for extending outside the first of the assembling of two longerons 1 is equipped with the side of the first floor profile 41 Installing plate 411, the first installation groove 412 is equipped with and along the first installation groove 412 in another side lower part of the first floor profile 41 Edge inside bending extension first in extension installing plate 413；It is equipped with a side lower part of the second floor profile 42 to extension Extension installing plate 421, is equipped with another side lower part of the second floor profile 42 outside be used to assemble with two longerons 1 second stretched Second installation groove 422 and along the second installation groove 422 edge inside bending extension second in extension installing plate 423； When first floor profile 41 and the second floor profile 42 are alternately installed, the first floor profile 41 and the second adjacent floor profile 42 tops are clamped, and the first interior extension installing plate 413 of the first floor profile of lower part 41 is located at the second floor type adjacent thereto connect Extend outside the second of material 42 on installing plate 421, that is, extension installing plate 413 is superimposed upon extension installing plate outside second in first 421；Fastener 7 is through extension installing plate 421 is fixed with longeron 1 outside extension installing plate 413 and second in first；Second floor type Extension installing plate 423 is located at extension installing plate 411 outside the first of the first floor profile 41 adjacent thereto connect in the second of material 42 On, fastener 7 is through extension installing plate 411 is fixed with longeron 1 outside extension installing plate 423 and first in second.So pass through phase The first adjacent floor profile 41 and the installing plate of the second floor profile 42, which are stacked, to be fixed so that the first floor profile 41 and Lower part between two floor profiles 42 fix and the first floor profile 41 and the second floor profile 42 and longeron 1 between consolidate It is fixed to complete at the same time, and the front and rear sides of the first floor profile 41 and the second floor profile 42 are all fixed on longeron 1, increase Add the fastness and stability between the first floor profile 41 and the second floor profile 42,4 overall fastness of enhancing floor.

Referring to shown in Fig. 7 and Figure 11, the top of the side of the first floor profile 41 is equipped with the first inner card cage being recessed inwardly 414, the top of opposite side is equipped with the first outwardly exterior bayonet slot 415；The top of the side of second floor profile 42 be equipped with to Second inner card cage 424 of sunken inside, the top of opposite side are equipped with the second outwardly exterior bayonet slot 425；In the first floor profile 41 and second floor profile 42 when alternately installing, the first inner card cage 414 of the first floor profile 41 with it is adjacent thereto connect second Second exterior bayonet slot 425 of floor profile 42 fastens, the first exterior bayonet slot 415 of the first floor profile 41 with it is adjacent thereto connect the Second inner card cage 424 of two floor profiles 42 fastens.So so that the first floor profile 41 and the second floor profile 42 it is upper Portion mutually connects and fixes, and the fixed fastness of increase assembling and planarization, and snap-action are simple, less fixed operation when Between.

In present embodiment, the second floor profile 42 include the second upper plate 4271 for being arranged in parallel and the second lower plate 4272, Vertically disposed second front side board, 4273 and second back side panel 4274, be uniformly spaced apart in the second front side board 4273 and the second back side panel Three connecting plates 4275 between 4274 and be arranged between the second front side board 4273 and connecting plate 4275 and with the second upper plate 4271 the second parallel installation groove plates 4276.So so that the second floor profile 42 has three square chambers and the second peace Fill the chamber of the top of groove 422.So so that the second floor profile 42 has larger composite bending modulus so that the entirety on floor 4 Intensity is larger.

As shown in Figure 12-Figure 15, the structure of front beam 2 and rear cross beam 3 in the present embodiment is illustrated, front beam 2 is with after Crossbeam 3 is integrated the aluminium alloy extrusions of extrusion forming, and front beam 2 includes front beam body 21, is located on front beam body 21 With the front bayonet slot 22 of 4 phase of floor clamping and along the outside horizontal-extending front beam mounting portion 23 of front beam body 21；Front beam Mounting portion 23 is superimposed with the interior extension installing plate on floor 4, and is fixed on by fastener 7 on the upper surface of two longerons 1.Also It is that the front beam body 21 of front beam 2 is located at the front end of longeron 1, front beam mounting portion 23 is located on longeron 1.

Rear cross beam 3 include rear cross beam body 31, be located on rear cross beam body 31 with 4 phase of floor clamping rear card slot 32, after The lower part of cross-beam body 31 is equipped with the rear extension of rear installation groove 33 and the inside bending extension in edge along rear installation groove 33 Installing plate 34.Extension installing plate 34 is superimposed with the outer extension installing plate on floor 4 afterwards, and is fixed on two longerons 1 by fastener 7 Upper surface on.Rear cross beam body 31 is located at the rear end of longeron 1, and rear installation groove 33 and rear extension installing plate 34 are located at longeron 1 On.Two rear bumper installing plates 35 extended downwardly are equipped with for the ease of the lower end for being assemblied in rear cross beam 3 of rear bumper.

As shown in Figure 16-Figure 21, the structure of side bar connector 6 and side bar 5 in the present embodiment, side bar 5 and side are illustrated Beam connection 6 is integrated the aluminium alloy extrusions of extrusion forming.

As shown in Figure 16 and Figure 17, side bar connector 6 includes the first side bar fixed part that fixation is connected with the side on floor 4 61st, along the first side bar fixed part 61 end outside bending extension the first side bar connecting portion 62 and connect along the first side bar Second side bar connecting portion 63 of the end downward bending extension in portion 62；Wherein the first side bar connecting portion 61 and the second side bar connecting portion 63 are connected fixation between side bar 5 by fastener 7 respectively, are equipped with and the first side bar connecting portion 61 and the second side on side bar 5 The side bar mounting portion that beam connecting portion 63 matches；By setting side bar connector 6 to be fixed easy to the assembling of side bar 7.

In order to increase between side bar connector 6 and floor 4 fixed fastness, side bar connector 6, which further includes, is arranged on the Two side bar connecting portions, 63 top and the second side bar fixed part 64 to extend internally, the second side bar fixed part 64 and the following table on floor 4 Face is welded and fixed；First side bar fixed part 61 and the side on floor 4 are also to be welded and fixed.Have on the second side bar fixed part 64 The fixing lug boss 65 of fixation is connected with the side on floor 4, is further fixed between increase side bar connector 6 and floor 4 firm Property.

As shown in Figure 16, Figure 18-Figure 21, side bar 5 includes side bar body 51 and is integrally formed or opens with side bar body 51 It is located at the auxiliary mounting portion that installation auxiliary device is useful on side bar body 51.Mounting portion is wherein aided in include being used to tight rope be installed At least one mounting portion of device 10, rope hook 20, plank 30 and pitching pile etc..Euphroe 10 is used for the rope for tensing restraint of loads, rope Hook 20 is used for the fixation of rope, plank 30 is arranged on semi-trailer frame, for fixing cargo when reinforce nail, pitching pile is used to insert Stake, is changed into van or side curtain car or breast board car etc. by flat car.This avoid the weldering between auxiliary mounting portion and side bar 5 Connect, avoid the deformation of side bar 5 caused by welding aids in mounting portion, intensity decreases and influence for vehicle appearance etc., Be conducive to improve the quality of side bar, increase the intensity of side bar, and improve the packaging efficiency of vehicle, reduce production cost.

As shown in Figure 18 and Figure 20, side bar body 51 has integrally formed at least two chambers being arranged side by side, this reality Applying has three chambers in example, be respectively the first chamber 511, middle second chamber 512 and the 3rd chamber of inner side in outside 513, wherein first chamber 511 is to be surrounded to form square type chamber by vertical plate and level board；Auxiliary mounting portion is included in outside The pitching pile mounting portion formed equipped with multiple pitching pile holes 5111 is spaced apart in first chamber 511.On the upper plate of first chamber 511 Even be spaced apart is equipped with multiple pitching pile holes 5111；In pitching pile, the lower part of pitching pile enters first chamber 511 through pitching pile hole 5111, The cavity wall of first chamber 511 plays the role of fixed pitching pile.The second chamber 512 and 513 chamber of the 3rd chamber of inner side are electric Pass by line chamber.

As shown in figure 18, side bar 5 further include along side bar body 51 inwardly horizontal-extending the first side bar mounting portion 52 and The the second side bar mounting portion 53 extended vertically downwards along the inner side of side bar body 51, the first side bar mounting portion 52 and the second side bar peace Dress portion 53 is mutually matched corresponding and solid respectively with the first side bar connecting portion 61 on side bar connector 6 and the second side bar connecting portion 63 It is fixed.

As shown in figure 21, the first side bar mounting portion 52 and the second side bar mounting portion 53 are connected by fastener 7 with side bar Part 6 is fixed, and is spaced apart on the first side bar mounting portion 52 and is equipped with some through holes.Positioning during for forming through holes is convenient, the The side bar groove 521 along side bar length direction is offered on one side bar mounting portion 52, through hole is opened up along side bar groove 521, improves fluting Work efficiency.

As shown in figure 18, auxiliary mounting portion further includes the notch for being integrally formed and being used for boarding 30 on side bar body 51 54, the top surface of notch 54 and side bar body 51 forms step-like.First side bar mounting portion 52, notch 54 and side bar body 51 Top surface form two-stage step shape from inside to outside.Plank 30 is installed in notch 54, inner side and the side bar connector 6 of plank 30 Contact.The notch 54 on side bar body 51 is integrally formed by setting so that being simple to manufacture for notch 54, reduces and be produced into This.

Two tight ropes for being used to clamp euphroe 10 that the lower end that auxiliary mounting portion is included in side bar body 51 is arranged side by side Device card slot 55, euphroe card slot 55 are integrally formed with side bar body 51, and euphroe 10 is equipped with to match with euphroe card slot 55 Snap-gauge.Increase has the blend stop extended respectively to other side for the spacing of euphroe 10 between two euphroe card slots 55 551, increase the fastness after for the spacing of the upside of euphroe 10, ensureing the installation of euphroe 10.It is integrally formed by setting Euphroe card slot 55 on side bar body 51 so that the installation of euphroe 10 fix it is simple, directly clamping can, and avoid pair In being welded and fixed for euphroe 10.

As shown in figure 18 and figure, mounting portion is aided in include multiple rope hooks installation that interval is opened in 51 lower end of side bar body Hole 56, in the present embodiment, rope hook mounting hole 56 is opened on the lower end wall of second chamber 512.By opening up rope hook mounting hole 56, Avoid being welded and fixed for rope hook 20.

As shown in Figure 18 and Figure 20, there is outwardly extending guard strip 514 respectively in the outside upper and lower ends of side bar body 51, The thickness of guard strip 514 is more than the cavity wall of side bar body 51, by setting guard strip 514 to be conducive to the protection for side bar 5, Yi Jizeng The intensity of edged beam 5.The outer panel of side bar 51 is equipped with the semicircular reinforcing rib 515 of outwardly convex, for increasing outer panel Intensity.

It is specifically described below in the present embodiment, the structure of longeron 1, longeron 1 is to pass through aluminium section bar molding assembly part.As Fig. 4, It is the first embodiment of longeron 1 shown in Figure 22-26 figures, Figure 22 is the structure diagram of the longeron on right side in Fig. 4, longeron 1 It is assembled by 13 3 upper flange 11, lower wing plate 12 and web aluminium section bars.

As shown in Figure 22 and Figure 23, longeron 1 include upper flange 11, lower wing plate 12, positioned at upper flange 11 and lower wing plate 12 it Between totally three components of web 13, three components are assembled by fastener 7 fixed-type.Lead to so between the component of longeron 1 The assembling for crossing fastener 7 is fixed, and avoids welding when longeron 1 is molded, and is avoided because deformation, intensity drop caused by welding Low, mass defect etc., is conducive to improve the quality of longeron 1, and improves the manufacturing speed of longeron 1, reduces manufacture cost.

As shown in Figure 23-Figure 26, floor 4 is fixed on upper flange 11 by fastener, the lower surface on floor 4 and upper flange 11 upper surface.Upper flange 11 and lower wing plate 12 are integrated the aluminium section bar of extrusion forming, and upper flange 11 has upper flange Body 111 and the upper flange mounting portion 112 extended downwardly along upper flange body 111.Lower wing plate 12 has 121 He of lower wing plate body The lower wing plate mounting portion 122 upwardly extended along lower wing plate body 121.It is equipped with upper flange mounting portion 112 upper with web 13 The upper flange recess 113 that end matches, is equipped with the bottom wing to match with the bottom of web 13 on lower wing plate mounting portion 122 Plate recess 123.When longeron 1 assembles, the lower end of web 13 is located at lower wing plate recess 123, and utilizes fastener 7 by web 13 Fixed with lower wing plate mounting portion 122；The upper end of web 13 is located at upper flange recess 113, and using fastener 7 by web 13 with Upper flange mounting portion 112 is fixed；So so that longeron 1 is fixed-type simple, upper flange recess 113 and lower wing plate recess are set 123 so that the installation positioning of web 13 simply, is conducive to improve the assembling speed of longeron 1；And be conducive between web 13 Fixation so that longeron 1 assemble after stress performance it is preferable.

In this implementation, longeron 1 is variable section structure, and web 13 is aluminum alloy extrusion section bar, and web 13 is arranged under arch Male structure, increases the bearing capacity of longeron 1, increases the compressive property of longeron.Fastener 7 is followed closely for aluminium rivet and aluminium HUCK.

In the present embodiment, as shown in figure 24, web 13 is inclined to the inner side of upper flange body 111, that is, upper flange body 111 have second positioned at the first noumenon 1111 of the inner side of upper flange mounting portion 112 and positioned at the outside of upper flange mounting portion 112 Body 1112, and the width of the first noumenon 111 is less than the width of the second body 1112.Namely by by the second body 1112 Width is set wider so that the distance that the outside of upper flange body 111 is contacted with floor 4 increases, and adds longeron 1 for ground The support arm of force of plate 4, is conducive to improve support degree of the longeron 1 for floor 4, improves the stress performance on floor 4.

In the present embodiment, as shown in figure 25, the upper surface of upper flange body 111 is plane, and there is certain gradient in lower surface, So be conducive to the finite reduction dead weight on the premise of intensity is met and reduce the cost of raw material.Specifically, the second body There is certain gradient in 1112 lower surface；The lower surface of the first noumenon 1111 is parallel with upper surface, under the first noumenon 1111 A upper limb board slot 114 is offered on surface, easy to the fixation of fastener 7.The lower surface of second body 1112 from outside to inside according to Secondary the first plane 11122 and the second inclined-plane including the first inclined-plane 11121, parallel with the upper surface of upper flange body 111 11123.A upper flange stress groove 114 is offered in the first plane 11122.And the first inclined-plane 11121 and level are set Angle between face is more than or equal to the angle between the second inclined-plane 11123 and horizontal plane；First inclined-plane 11121 and horizontal plane Between angle be 3-8 degree, that is, the angle between horizontal plane is smaller, and sets first on the second body 1112 flat In face 11122 and the lower surface of the first noumenon 1111 are generally aligned in the same plane, fastener 7 is fixed in the first plane 11122, is set Second inclined-plane 11123 is so that the distance between upper surface of the second inclined-plane 11123 and upper flange body 111 is more than the first noumenon 1111 thickness, so increases the thickness of the inner side of the second body 1112, is conducive to increase the intensity of the second body 1112, it is ensured that increase After the support arm of force for having grown the second body 1112, the increase of the second body 1112 intensity of itself, ensure that having for floor 4 Power supports.

As shown in figure 27, be second of embodiment of longeron 1, longeron 1 by 12 two components of upper flange 11 and lower wing plate, It is by fastener 7 that two components assemblings are fixed-type.So fixed, kept away by the assembling of fastener 7 between the component of longeron 1 Welding when longeron 1 is molded is exempted from, has avoided because deformation, intensity decreases, mass defect etc. caused by welding, are conducive to improve The quality of longeron 1, and improve the manufacturing speed of longeron 1, reduce manufacture cost.

Floor 4 is fixed on upper flange 11 by fastener, the lower surface on floor 4 and the upper surface of upper flange 11. Upper flange 11 and lower wing plate 12 are integrated the aluminium section bar of extrusion forming, and upper flange 11 has upper flange body 111 and along upper limb The upper flange mounting portion 112 that plate body 111 extends downwardly.Lower wing plate 12 has lower wing plate body 121 and along lower wing plate body 121 The lower wing plate mounting portion 122 upwardly extended.Wherein lower wing plate mounting portion 122 is vertical plate, is equipped with upper flange mounting portion 112 With the recess on lower wing plate mounting portion 122, the top of lower wing plate mounting portion 122 is located in recess, and is fixed by fastener 7. So so that longeron 1 is fixed-type simple, when setting recess make it that upper flange 11 and lower wing plate 12 are installed, installation positioning is simple, Be conducive to improve the assembling speed of longeron 1, and be conducive to increase the stress performance after longeron 1 assembles.Upper flange is set to install The median plane of portion 112 and lower wing plate mounting portion 122 overlap so that lower wing plate mounting portion 122 to upper flange mounting portion 112 formed with The support of power, increases the stress performance of longeron 1.

As shown in Figure 14, Figure 28-Figure 30, illustrate the structure of the rear bumper 400 positioned at 100 afterbody of vehicle frame, rear bumper 400 by 7 assembly connection of fastener on rear cross beam 3 and longeron 1.The lower end of rear cross beam 3 is equipped with the rear bumper extended downwardly Installing plate 35, the top of rear bumper 40 are fixed on rear bumper installing plate 35 by fastener 7.Rear bumper 400 is also set The strengthening support 408 of installation is useful for, the front end of strengthening support 408 connects rear bumper 400 by fastener 7, and upper end passes through fastening The lower end of 7 longitudinal beam connected 1 of part.Fastener 7 is bolt.

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

The edge column 403 of the left and right sides is arranged on by increase, strengthens the integral strength of rear bumper, in particular so that The intensity of 400 both sides of rear bumper is strengthened, crashworthiness enhancing, and the problems such as deformation fracture occurs in when collision free, further enhances The security of rear bumper 400, protection of the increase rear bumper 400 for semitrailer.

In order to further increase the integral strength of rear bumper 400,403 corresponding side of edge column column 401 it Between be equipped with side seal board 404, that is, be provided with two pieces of side seal boards 404；License plate 405 is provided between two root posts 401, half The licence plate of trailer is fixed in license plate 405.By setting 404 rear bumper 400 of side seal board to form a closed knot Structure, close-connected between each component, entirety that mutually supports, further enhancing the intensity of rear bumper 400.

In the present embodiment, some horizontal reinforcing ribs 4041 are equipped with side seal board 404, increase the intensity of side seal board 404, And bonding strength effectively between reinforcement column 401, crosspiece 402 and edge column 403；Set reinforcing rib 4041 can conduct at the same time The mounting bracket of taillight, without extra increase lamp support, realizes good appearance, and reduces material cost, saves installation lamp bracket Time so that production cost reduce.

As shown in figure 29, the lateral surface of two edge columns 403 is arc transiting surface 4031, that is, from edge column 403 The arcwall face of front end face backwards face transition.By setting arc transiting surface 4031, when there is side collision, collision can be alleviated Damage, more securely and reliably, effectively strengthens the security reliability of rear bumper 400.

As shown in figure 29, crosspiece 402 is the aluminium section bar with rectangular chamber, its section is hollow square knot in other words Structure.So crosspiece 402 has higher composite bending modulus in vehicle forward direction, there is higher bending resistance in cross-wise direction in other words Modulus；The whole upper surface area of crosspiece 402 is larger at the same time, and crosspiece 402 is set to hollow-core construction, is ensureing sufficient intensity basis It is upper effectively to reduce rear bumper weight, while saved material.

In the present embodiment, some anti-skidding tongues 4021 to raise up are equipped with the upper surface of crosspiece 402, crosspiece is set 402 wider width in the longitudinal direction, on the one hand can increase the intensity of crosspiece 402, on the other hand can cause crosspiece 402 are provided with the function of pedal, meet the requirement conveniently got on or off the bus, more convenient safety；And special setting pedal is avoided, Further reduce production cost.

Illustrate below in the present embodiment, the assembly method of semitrailer, specifically includes following step：

S1, two longerons 1 assemble fixed-type respectively.

S2, will traction assembly 200 be connected fixation by bolts assemblies with two longerons 1.

S3, will mutually be clamped between front beam 2, floor 4, rear cross beam 3 and be fastened on the longeron by fastener On.

It will be specially fixed on together on longeron 1 after front beam 2 and a floor profile clamping and by screw first, A floor profile is clamped with previous floor profile and by being fixed on together with screw on longeron 1 afterwards, until rear cross beam 3 are stuck in last root floor profile and are fixed on together on longeron 1 by screw.

S4, the left and right sides that two side bar connectors 6 are respectively welded to front beam 2, floor 4 and rear cross beam 3.

Two side bars 5, be bolted and be fixed on two side bar connectors 6 by S5 respectively.

Rear bumper 400, be bolted and be fixed on rear cross beam 3 and longeron 1 by S6.

Supporting leg assembly 300, running gear 500 etc., be installed on longeron 1 by S7.

The foregoing is merely the preferable possible embodiments of the present invention, not limit the scope of the invention, it is all with this Equivalent structure change made by description of the invention and accompanying drawing content, is all contained in protection scope of the present invention.

Claims (8)

1. a kind of assembled semi-trailer frame, including two longerons of parallel longitudinal setting, a front beam, a rear cross beam and ground Plate, the front beam are vertically set on the front end of two longerons, and the rear cross beam is vertically set on the rear end of two longerons, its feature exists In the front beam and rear cross beam are respectively engaged with the rear and front end on the floor, are assembling between the floor and two longerons Connection is fixed, and the front beam and rear cross beam are fixed between two longerons for assembly connection respectively；The vehicle frame further includes both sides Beam, is provided with side bar connector, the side bar and side bar connector between the side bar and the floor, front beam and rear cross beam Between fixed for assembly connection；The first side bar that the side bar connector includes being connected fixation with the side on the floor is fixed Portion, along the first side bar fixed part end outside bending extension the first side bar connecting portion and along first side bar Second side bar connecting portion of the end downward bending extension of connecting portion；The first side bar connecting portion and the second side bar coupling part Do not fixed with the side bar.

2. vehicle frame according to claim 1, it is characterised in that the floor is by being laterally laid on two longerons and playing More floor profiles of cross-brace effect are formed by connecting.

3. vehicle frame according to claim 2, it is characterised in that the floor profile has at least one chamber, describedly Profile material is fixed on two longerons, is mutually clamped between adjacent two floor profiles.

4. vehicle frame according to claim 1, it is characterised in that the side bar include side bar body and with the side bar This body by integral forming is opened in the auxiliary mounting portion that installation auxiliary device is useful on the side bar body.

5. vehicle frame according to any one of claims 1 to 4, it is characterised in that the longeron include upper flange, lower wing plate, And the web between the upper flange and lower wing plate, the upper and lower ends portion of the web respectively with the upper flange and under Wing plate is fixedly connected by fastener.

6. a kind of semitrailer, it is characterised in that including claim 1 to 5 any one of them assembled semi-trailer frame.

7. semitrailer according to claim 6, it is characterised in that the semitrailer further includes rear bumper, is protected after described Dangerous thick stick is fixed on the afterbody of the vehicle frame using assembly connection；The rear bumper includes：Two columns that are vertically arranged in parallel and It is horizontally installed on a crosspiece of the column lower end, the rear bumper further includes two edge columns for being arranged on the left and right sides, and two Left and right ends of the edge column respectively with the crosspiece are connected.

8. a kind of assembly method of semitrailer, it is characterised in that the semitrailer includes claim 1 to 5 any one of them Assembled semi-trailer frame, traction assembly and rear bumper, the assembled semi-trailer frame further include two side bars and are located at Side bar connector between the side bar and the floor, front beam and rear cross beam, the assembly method specifically include following steps Suddenly：

A, the traction assembly is fixed with two longeron assembly connections；

B, it will mutually be clamped between the front beam, floor, rear cross beam and be fastened on by fastener on the longeron；

Both sides beam connection is respectively welded to the left and right sides of the front beam, floor and rear cross beam C,；

D, two side bars are fastened on the beam connection of both sides by fastener respectively；

E, rear bumper is fastened on the rear cross beam and longeron by fastener.