CN213921209U - Frame cross beam assembly - Google Patents

Abstract

The utility model provides a frame beam assembly, this frame beam assembly includes the roof beam body subassembly, left branch strut and right branch strut, the roof beam body subassembly includes the bottom plate, the front bezel, the back plate, left end lid and right-hand member lid, front bezel and back plate set up the both sides at the bottom plate along the fore-and-aft direction, the back plate includes the top wall portion, first side wall portion and second side wall portion, the top wall portion sets up between first side wall portion and second side wall portion, the top wall position is in the top of bottom plate, second side wall portion is connected with the front bezel, the both ends of front bezel are provided with first bellying and second bellying respectively, left end lid and right-hand member lid set up the both ends at the bottom plate along the left-and-right direction, in vertical direction, first bellying and second bellying are all higher than the top wall portion, the upper portion of left end lid and right end lid all is higher than the top wall portion; the left support frame is disposed on the left end of the top wall portion, and the right support frame is disposed on the right end of the top wall portion. The utility model discloses can reduce the automobile frame height, improve structural strength and security.

Description

Frame cross beam assembly

Technical Field

The utility model relates to a car frame field specifically is to relate to a frame beam assembly.

Background

In recent years, with the development of economy, more and more private cars are used in cities, so that road congestion and environmental pollution are increasingly serious. At present, the simplest and most economical way for effectively relieving traffic pressure and facilitating passenger travel is to vigorously develop public transportation. Compared with other transportation means, the bus has two main advantages, namely large passenger capacity and low cost; secondly, the existing road facilities can be utilized, so that the bus has received much attention in recent years. Buses are divided into fuel buses and electric buses, and the electric buses adopt electric energy as a power source, so that the pollution to the environment is reduced.

The frame of the present electric passenger car generally comprises a front section frame, a middle section frame and a rear section frame, and a beam component and a rear wheel arch baffle plate are arranged at the front end of the rear section frame. The existing beam assembly is generally made of tubular parts, the rear wheel arch baffle is directly welded on the beam assembly, although the welding process is simple, in order to match the height setting of the rear wheels, the distance between the beam assembly and the rear wheel arch baffle is generally higher than the ground, which is not beneficial to meeting the requirement of the urban passenger transport low floor specification, and the gravity center of the electric passenger transport vehicle is raised, so that the safety of the vehicle is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can reduce the automobile frame height, improve the frame crossbeam subassembly of structural strength and security.

In order to achieve the above object, the utility model provides a pair of frame beam assembly, including the roof beam body subassembly, left branch strut and right branch strut, the roof beam body subassembly includes the bottom plate, the front bezel, the back plate, left end lid and right end lid, front bezel and back plate set up the both sides at the bottom plate along the fore-and-aft direction, the back plate includes the top wall portion, first side wall portion and second side wall portion, the top wall portion sets up between first side wall portion and second side wall portion, the top wall position is located the top of bottom plate, second side wall portion is connected with the front bezel, the both ends of front bezel are provided with first bellying and second bellying respectively, in the vertical direction, first bellying and second bellying all are higher than the top wall portion, left end lid and right end lid set up the both ends at the bottom plate along the left-right direction, in the vertical direction, the upper portion of left end lid and right end lid all is higher than the top wall portion; the left supporting part is fixedly connected with the first bulge part and the left end cover respectively; the right supporting frame is arranged at the right end of the top wall part and is fixedly connected with the second protruding part and the right end cover respectively.

According to the scheme, the bottom plate, the front plate and the rear plate are enclosed to form a tubular-like beam assembly, the left support frame and the right support frame are arranged on the beam assembly, and the rear wheel arch baffle is arranged on the left support frame and the right support frame, so that the height of the bottom frame can be reduced on the premise of matching the height of the rear wheels, the gravity center of an automobile can be lowered, and the safety of the automobile can be improved; through setting up the roof portion that first bellying and second bellying on the front bezel all exceed the back plate, the upper portion that sets up the left and right sides end cover simultaneously exceeds the top wall portion of back plate, and the support frame about being convenient for fix from a plurality of sides is convenient for improve the joint strength of support frame about to whole beam assembly's structural strength.

Further, the top wall portion is sequentially provided with a first position score and a second position score along the extending direction of the top wall portion, the first side wall portion is provided with a first side score, a second side score, a third side score and a fourth side score along the extending direction of the first side wall portion in an arrayed manner, the first side score and the second side score are located on the left side and the right side of the first position score, and the third side score and the fourth side score are located on the left side and the right side of the second position score.

According to the scheme, the nicks are arranged on the back plate, so that the subsequent left and right support frames can be quickly positioned conveniently, and compared with the method for positioning by measuring the specific position and size of each part through a measuring tool in the existing welding process, the method has the advantages of saving time and improving welding efficiency.

The left end cover is provided with a left front plate nick, a left back plate nick and a left fixed plate nick, and the left back plate nick is positioned between the left front plate nick and the left fixed plate nick; the right end cover is provided with a right front plate nick, a right rear plate nick and a right fixed plate nick, and the right rear plate nick is positioned between the right front plate nick and the right fixed plate nick.

It is obvious by above-mentioned scheme, through set up a plurality of nicks on controlling the end cover respectively, the quick location of follow-up front bezel, the respective tip of back plate of being convenient for can save time, improve welding efficiency, can simply verify again whether beam assembly takes place deformation, if take place deformation, correspond through the tip of adjustment beam assembly and nick and arrange, be favorable to correcting beam assembly's deformation, guarantee beam assembly quality.

The left support frame comprises a left fixed seat, a left first fixed plate, a left second fixed plate, a left third fixed plate, a left fourth fixed plate and a left top plate, wherein the left first fixed plate, the left fixed seat and the left second fixed plate are sequentially arranged along the left-right direction; the left first fixing plate, the left third fixing plate and the left fourth fixing plate are arranged in a front-back direction, the left third fixing plate is obliquely arranged in a left-right direction, two ends of the left third fixing plate extend towards the first bulge part and the left end cover respectively, and the left fourth fixing plate is arranged on the left third fixing plate and extends back to the left first fixing plate; the left top plate is arranged above the first left fixing plate, the second left fixing plate, the third left fixing plate, the fourth left fixing plate and the first protruding portion.

The left end of the top wall part is provided with a first positioning hole, the bottom wall of the left three fixing plates is provided with a first positioning bulge, and the first positioning bulge is arranged in the first positioning hole; the left top plate is provided with a second positioning hole, the top wall of the left three fixing plates is provided with a second positioning bulge, and the second positioning bulge is arranged in the second positioning hole.

It is thus clear that by above-mentioned scheme, through setting up first locating hole and the protruding joint of first location, need not to set up the fixed three left fixed plates of extra fixed subassembly, existing three left fixed plates of being favorable to realizing and push up the quick location of wall portion, can prevent again that three left fixed plates from taking place the offset in welding process, improving welding quality between them.

The right supporting frame comprises a right fixed seat, a right first fixed plate, a right second fixed plate and a right top plate, wherein the right fixed plate, the right fixed seat and the right second fixed plate are sequentially arranged along the left-right direction; the right top plate is arranged above the right fixing plate, the right fixing seat, the right second fixing plate and the second protruding portion.

Drawings

Figure 1 is a block diagram of an embodiment of the frame rail assembly of the present invention.

Figure 2 is an exploded view of an embodiment of the frame rail assembly of the present invention.

Fig. 3 is an exploded view of a beam assembly in an embodiment of the frame rail assembly of the present invention.

Fig. 4 is an exploded view of the left support bracket of an embodiment of the cross-frame assembly of the present invention.

Fig. 5 is an exploded view of the right support bracket of an embodiment of the frame rail assembly of the present invention.

Fig. 6 is a schematic structural diagram of a step one in the welding method of the present invention.

Fig. 7 is a schematic structural diagram of step two in the welding method of the present invention.

Fig. 8 is a schematic structural diagram of step three in the welding method of the present invention.

Fig. 9 is a schematic structural diagram of step four in the welding method of the present invention.

Fig. 10 is a partial enlarged view at a in fig. 9.

Fig. 11 is a schematic structural diagram of a first viewing angle in step five of the welding method of the present invention.

Fig. 12 is a schematic structural diagram of a second viewing angle in step five of the welding method of the present invention.

Fig. 13 is a schematic structural diagram of step six in the welding method of the present invention.

The present invention will be further explained with reference to the drawings and examples.

Detailed Description

Frame Cross Member Assembly embodiments

Referring to fig. 1 and 2, the frame cross member assembly comprises a beam body assembly 1, a left support frame 2 and a right support frame 3, wherein the left support section frame is arranged at the left end of the beam body assembly 1, and the right support frame 3 is arranged at the right end of the beam body assembly 1.

Referring to fig. 3 in conjunction with fig. 2, the beam assembly 1 includes a bottom plate 11, a front plate 12, a rear plate 13, a left end cap 14 and a right end cap 15, the front plate 12 and the rear plate 13 are disposed on both sides of the bottom plate 11 in the front-rear direction, and the left end cap 14 and the right end cap 15 are disposed on both ends of the bottom plate 11 in the left-right direction. The front-back direction described in this embodiment refers to the front-back direction of the frame when the frame cross member assembly is mounted to the frame, specifically, the front direction is toward the front end of the vehicle head, and the back direction is toward the rear end of the vehicle tail.

The bottom plate 11 comprises a flat plate section 111, a left inclined plate section 112 and a right inclined plate section 113, the flat plate section 111 is arranged between the left inclined plate section 112 and the right inclined plate section 113, the left inclined plate section 112 inclines towards the flat plate section 111 from top to bottom, and the right inclined plate section 113 inclines towards the flat plate section 111 from top to bottom. One end of the left inclined plate section 112, which is far away from the plate section 111, is provided with a first small plate section 114, one end of the right inclined plate section 113, which is far away from the plate section 111, is provided with a second small plate section 115, and the first small plate section 114 and the second small plate section 115 are respectively parallel to the plate section 111.

The rear plate 13 includes a top wall portion 131, a first side wall portion 132, and a second side wall portion 133, the top wall portion 131 is vertically disposed between the first side wall portion 132 and the second side wall portion 133, the first side wall portion 132 and the second side wall portion 133 respectively extend downward from the surface of the top wall portion 131, the first side wall portion 132 extends downward a distance greater than the second side wall portion 133, and a lower edge of the first side wall portion 132 is flush with the flat plate section 111, the left inclined plate section 112, and the right inclined plate section 113, respectively. The top wall 131 is positioned directly above the bottom plate 11, and the second side wall 133 is welded and fixed to the front plate 12. The front plate 12 is provided at left and right ends thereof with first and second bosses 121 and 122, respectively, and the first and second bosses 121 and 122 are integrally formed with the front plate 12, respectively. In the vertical direction, the first and second bosses 121 and 122 are each higher than the top wall portion 131, and the first and second bosses 121 and 122 have the same height.

The top wall part 131 is provided with a first position score 1311 and a second position score 1312 in sequence along the extending direction thereof, and the first side wall part 132 is provided with a first side score 1321, a second side score 1322, a third side score 1323, and a fourth side score 1324 along the extending direction thereof. The first side score 1321 and the second side score 1322 are located at both left and right sides of the first position score 1311, and the third side score 1323 and the fourth side score 1324 are located at both left and right sides of the second position score 1312. All the above-mentioned scores are engraved on the surface of the back plate 13 by means of laser cutting. In the production process of the rear plate 13, the processes of blanking, punching, bending and the like are needed, and the nicks can be processed and finished together with a plurality of hole sites in the punching process, so that the unnecessary process is avoided, the time is saved, and the efficiency is improved.

The bottom wall of the left end cover 14 is welded and fixed with the bottom surface of the first small flat plate section 114, and the bottom wall of the right end cover 15 is welded and fixed with the bottom surface of the second small flat plate section 115. In the vertical direction, the upper portion of the left end cap 14 and the upper portion of the right end cap 15 are both higher than the top wall portion 131, and the upper portion of the right end cap 15 is slightly higher than the height of the second protrusion portion 122. The left end cap 14 has a left front panel score 141, a left back panel score 142, and a left retainer panel score 143 disposed on the inside of the sidewall, the left back panel score 142 being located between the left front panel score 141 and the left retainer panel score 143. The shape of the left front panel score 141 matches the end profile of the left end of the front panel 12 and the shape of the left back panel score 142 matches the end profile of the left end of the back panel 13. All of the above scores are laser cut on the surface of the left end cap 14.

The right end cap 15 has a right front panel score 151, a right rear panel score 152 and a right fixed panel score 153 disposed on the inside of the sidewall thereof, the right rear panel score 152 being located between the right front panel score 151 and the right fixed panel score 153. The shape of the right front panel score 151 matches the end profile of the right end of the front panel 12 and the shape of the right rear panel score 152 matches the end profile of the right end of the rear panel 13. All the above scores are engraved on the surface of the right end cap 15 by means of laser cutting. All the above scores are engraved on the surface of the right end cap 15 by means of laser cutting.

Referring to fig. 4 in conjunction with fig. 3, the left support frame 2 includes a left fixing base 21, a left first fixing plate 22, a left second fixing plate 23, a left third fixing plate 24, a left fourth fixing plate 25 and a left top plate 26. The left first fixing plate 22, the left fixing seat 21, and the left second fixing plate 23 are sequentially arranged in the left-right direction, and the left fixing seat 21 is provided on the top wall portion 131 along the first position notch 1311. Left fixing base 21 sets up to approximate "n" type, and left fixing base 21 includes top arm 211 and two support arms 212, and two support arms 212 set up perpendicularly in the left and right sides of top arm 211, all are provided with welded connection portion on the diapire of support wall 212 and the vertical wall, and welded connection portion is perpendicular to support wall 212 surface, is convenient for weld with top wall portion 131 and first bellying 121 respectively. The support arm 212 is provided with a first mounting hole 213, the first mounting hole 213 is located above the welding connection portion, and the first mounting hole 213 extends in the left-right direction. The first left retainer plate 22 is disposed on the first sidewall 132 along the first side notch 1321 and protrudes upward, the first bending portion 221 is disposed at the protruding portion of the first left retainer plate 22, and the first bending portion 221 is fixedly connected to one of the support arms 212 of the left retainer 21. The first bending portion 221 is provided with a first through hole 222, and the first through hole 222 is coaxially disposed with the first mounting hole 213 and communicates with each other. The left end profile of the left retainer plate 22 matches and corresponds to the left retainer plate notch 143. The second left fixing plate 23 is disposed on the first sidewall along the second side notch 1322 and protrudes upward, a second bending portion 231 is disposed at the protruding portion of the second left fixing plate 23, and the second bending portion 231 is fixedly connected to the other supporting arm 212 of the left fixing base 21. The second bending portion 231 is provided with a second through hole 232, and the second through hole 232 and the first mounting hole 213 are coaxially arranged and are communicated with each other.

The left one fixing plate 22, the left three fixing plates 24, and the left four fixing plates 25 are arranged in a front-rear direction. The left three fixing plates 24 are obliquely arranged along the left-right direction, and two ends of the left three fixing plates 24 are fixedly connected with the first protruding part 121 and the left end cover 14 respectively. The left third fixing plate 24 is provided with a left four fixing plate notch 243, one end of the left four fixing plate 25 is arranged on the left third fixing plate 24 along the left four fixing plate notch 243, and the other end of the left four fixing plate 25 extends back to the direction of the left first fixing plate 22.

The left top plate 26 is disposed above the left first fixing plate 22, the left second fixing plate 23, the left third fixing plate 24, the left fourth fixing plate 25, and the first protrusion 121. The bottom wall of the left third fixing plate 24 is provided with two first positioning protrusions 241, the two first positioning protrusions 241 are arranged along the inclined direction of the left third fixing plate 24, and the top wall portion 131 of the rear plate 13 is provided with a first positioning hole 1313 matched with the first positioning protrusions 241. First positioning protrusion 241 is inserted in first positioning hole 1313 and can preposition three left fixing plates 24, so that three left fixing plates 24 do not need additional auxiliary positioning tools during welding, the position accuracy of three left fixing plates 24 is improved, and subsequent welding is facilitated. Two second positioning protrusions 242 are formed on the top wall of the left third fixing plate 24, and the two second positioning protrusions 242 are arranged in the oblique direction of the left third fixing plate 24. Be provided with on the left side roof 26 with second location arch 242 complex second locating hole 161, second location arch 242 sets up in second locating hole 161, can carry out prepositioning fast to left roof 26, can improve the installation effectiveness of left roof 26, can improve the position accuracy of left roof 26 again, unexpected left roof offset that causes when avoiding follow-up welding.

Referring to fig. 5 in combination with fig. 3, the right supporting frame 3 includes a right fixing base 31, a right first fixing plate 32, a right second fixing plate 33 and a right top plate 34, the right second fixing plate 33, the right fixing base 31 and the right first fixing plate 32 are sequentially arranged in a left-right direction, the right fixing base 31 is disposed on the top wall portion 131 along the second position notch 1312, the structure of the right fixing base 31 is the same as that of the left fixing base 21, and details thereof are omitted. The right fixing plate 32 is disposed on the first sidewall 132 along the fourth side score 1324 and protrudes upward vertically, a third bending portion 321 is disposed at the protruding position of the right fixing plate 32, and the third bending portion 321 is fixedly connected with the right sidewall of the right fixing seat 31. The right end of the right holding plate 32 is contoured to match and correspond to the right holding plate notch 153. The right second fixing plate 33 is disposed on the first side wall 132 along the fourth side score 1324 and protrudes vertically upward, a fourth bending portion 331 is disposed at the protruding position of the right second fixing plate 33, and the fourth bending portion 331 is fixedly connected with the left side wall of the right fixing seat 31. The third bending portion 321 is provided with a third through hole 322, the fourth bending portion 331 is provided with a fourth through hole 332, and the third through hole 322 and the fourth through hole 332 are coaxially arranged with the first mounting hole 311 on the right fixing seat 31. The right top plate 34 is disposed above the right first fixing plate 32, the right fixing seat 31, the right second fixing plate 33, and the second protrusion 122 and fixed by welding.

The shapes of all the scores of the embodiment can be specifically set according to the profile of the sheet metal part corresponding to the scores, and specifically can be set to be in a straight shape, an "L" shape, an "n" shape, a rectangle or a polygon, and the like.

Method embodiment for welding cross member assembly of vehicle frame

The welding method of the embodiment needs to complete welding of the frame cross member assembly on the clamp 4 by the clamp 4, and comprises the following steps of one step to seven steps.

The method comprises the following steps:

referring to fig. 6 and 3, the bottom plate 11, the left end cap 14 and the right end cap 15 are fixedly placed on the corresponding positioning support surfaces of the fixture 4, and the bottom plate 11, the left end cap 14 and the right end cap 15 are welded and fixed.

Specifically, the flat plate segments 111 are first placed on four horizontal positioning support blocks 41 in the middle of the jig 4 and the displacement of the flat plate segments 111 in the front-rear direction is limited by inclined surfaces provided on both sides of the horizontal positioning support blocks 41; then, the left end cover 14 is arranged on a left end cover fixing seat 42 at the left end of the clamp 4, so that the displacement of the left end cover 14 is limited in the up-down and left-right directions, and the displacement of the left end cover 14 in the front-back direction is limited through a first stop block 421 arranged on one side of the left end cover fixing seat 42, wherein the height position of the left end cover 14 in the vertical direction is higher than that of the flat plate section 111; then, the left inclined plate section 112 is obliquely placed between the left end cover 14 and the flat plate section 111 and is fixed by welding, so that the first end of the left inclined plate section 112 is flush with the flat plate section 111, and the second end of the left inclined plate section 112, namely the first small flat plate section 114, is lapped on the bottom wall of the left end cover 14; then, the right end cover 15 is arranged on a right end cover fixing seat 43 at the right end of the clamp 4, so that the displacement of the right end cover 15 is limited in the vertical and the left and right directions, the displacement of the right end cover 15 in the front and back directions is limited through a second stop block arranged on one side of the right end cover fixing seat 43, the height position of the right end cover 15 in the vertical direction is higher than that of the flat plate section 111, and the first stop block 421 and the second stop block are both positioned on the same side of the bottom plate 11; the right inclined plate section 113 is then obliquely placed between the right end cover 15 and the flat plate section 111 and fixed by welding, so that the first end of the right inclined plate section 113 is flush with the flat plate section 111, and the second end of the right inclined plate section 113, i.e. the second small flat plate section 115, is lapped on the bottom wall of the right end cover 15.

Step two:

referring to fig. 7 and 3, the rear plate 13 is fixedly placed on the bottom plate 11 between the left and right end caps 14 and 15 such that both ends of the rear plate 13 are respectively arranged along the left and right rear plate scores 142 and 152, and the rear plate 13, the bottom plate 11, the left end cap 14, and the right end cap 15 are welded and fixed.

Specifically, the fixture 4 is provided with two rear plate fixing blocks 44 and two first lifting fixing seats 45 arranged in a left-right direction, and the first side wall portion 132 of the rear plate 13 abuts against the rear plate fixing blocks 44 to serve the function of righting the rear plate 13 and prevent the rear plate 13 from inclining in the vertical direction; the first elevation ram 451 of the first elevation fixing base 45 presses against the top wall portion 131 of the rear plate 13, and functions to fix the rear plate 13.

Step three:

referring to fig. 8 and 3, the front plate 12 is placed on the bottom plate 11 between the left and right end caps 14 and 15 such that both ends of the front plate 12 are arranged along the left and right front plate scores 141 and 151, respectively, and the front plate 12, the rear plate 13, the left end cap 14, and the right end cap 15 are welded and fixed.

Specifically, the jig 4 is provided with two front plate fixing blocks 46 and three second lifting fixing seats 47 which are arranged in a left-right direction in a draining manner, and the front plate 12 is abutted to the front plate fixing blocks 46, so that the front plate 12 is tightly attached to the second side wall portion 133 of the rear plate 13. In the vertical direction, the second lifting ram 471 of the second lifting fixing seat 47 presses on the first protrusion 121 and the second protrusion 122 of the front plate 12, respectively, and plays a role of fixing the front plate 12.

Step four:

in this step, the left support frame 2 and the right support frame 3 may be welded to the top wall portion 131 at the same time, or the left support frame 2 and the right support frame 3 may be welded to the top wall portion 131 in the order, and the order of the left support frame 2 and the right support frame 3 is not limited, and in this embodiment, the former is preferable.

Referring to fig. 9, 10, 4 and 5, the left fixing seat 21 is placed on the top wall portion 131 along the first position notch 1311 so that the left fixing seat 21 is adjacent to the first protrusion 121, and then the left fixing seat 21 is fixed by the first pin positioning assembly 48 of the clamp 4 and is welded.

Specifically, the first pin positioning assembly 48 includes a first positioning column 481 and two first positioning pins 482, wherein annular flanges 483 are disposed on left and right sides of the first positioning column 481, a second mounting hole is disposed at the center of the annular flanges 483, the annular flanges 483 protrude from the surface of the first positioning column 481, and the first positioning pins 482 are detachably connected to the second mounting hole. The two annular flanges 483 are located between the two support arms 212 of the left fixing seat 21, the second mounting hole is coaxially arranged with the first mounting hole 213, and the first positioning pin 482 is inserted into the second mounting hole of the annular flange 483 through the first mounting hole 213, so as to position the left fixing seat 21 on the top wall portion 131. The first pin positioning assembly 48 is beneficial to correcting and maintaining the distance between the two supporting arms 212 of the left fixing seat 21, so that the left fixing seat 21 is prevented from being deformed and the accuracy of the mounting position of subsequent parts is prevented from being affected.

The right fixing seat 31 is placed on the top wall portion 131 along the second position notch 1312 so that the right fixing seat 31 is adjacent to the second protruding portion 122, and then the right fixing seat 31 is fixed by the second pin shaft positioning assembly 49 of the clamp 4 and is welded. The structure of the second pin positioning assembly 49 is the same as that of the first pin positioning assembly 48, and will not be described herein.

Step five:

referring to fig. 11, 3 and 4, the first bending portion 221 of the first left anchor plate 22 is overlapped on the bottom wall of the left anchor 21, and the first bending portion 221 is adjacent to the left side wall of the left anchor 21, and then the position of the first left anchor plate 22 is adjusted such that the first left anchor plate 22 is simultaneously arranged along the first side score 1321 and the first left anchor plate score 143. At this time, the first through hole 222 of the first bending portion 221 and the first mounting hole 213 of the left fixing seat 21 are coaxially disposed and communicated with each other, and the first positioning pin 482 sequentially passes through the first through hole 222 and the first mounting hole 213 and is inserted into the second mounting hole, so as to position the left fixing plate 22. And then the left fixing plate 22, the left fixing seat 21, the first side wall part 132 and the left end cover 14 are welded and fixed.

The second bending portion 231 of the left second fixing plate 23 is overlapped on the bottom wall of the left fixing seat 21, and the second bending portion 231 is adjacent to the right side plate of the left fixing seat 21, and then the position of the left second fixing plate 23 is adjusted so that the left second fixing plate 23 is arranged along the second side notch 1322. At this time, the second through hole 232 of the second bending portion 231 and the first mounting hole 213 of the left fixing seat 21 are coaxially disposed and communicated with each other, and the first positioning pin 482 sequentially passes through the second through hole 232 and the first mounting hole 213 and is inserted into the second mounting hole, so as to position the left second fixing plate 23. And then the left second fixing plate 23, the left fixing seat 21 and the first side wall portion 132 are fixed by welding.

Referring to fig. 12, 3 and 4, the first positioning protrusion 241 of the left third fixing plate 24 is inserted into the first positioning hole 1313 of the top wall portion 131, and then the left fourth fixing plate 25 is disposed on the top wall portion 131 and the position of the left fourth fixing plate 25 is adjusted such that the left fourth fixing plate 25 is disposed along the left fourth fixing plate notch 243. The left three fixing plate 24, the left four fixing plate 25, the left end portion and the top wall portion 131 are then welded and fixed.

Referring to fig. 11, 3 and 5, the third bent portion 321 of the right fastening plate 32 is overlapped on the bottom wall of the right fastening plate 31, and the third bent portion 321 is adjacent to the right side plate of the right fastening plate 31, and then the position of the right fastening plate 32 is adjusted so that the right fastening plate 32 is simultaneously arranged along the fourth side notch 1324 and the right fastening plate notch 153. At this time, the third through hole 322 of the third bending portion 321 is coaxially disposed with the first mounting hole 213 of the right fixing seat 31, and the second positioning pin 491 of the second pin positioning assembly 49 sequentially passes through the third through hole 322 and the first mounting hole 213 to be inserted into the second mounting hole of the second pin positioning assembly 49, so as to position the right fixing plate 32. Then, the right fixing plate 32, the right fixing seat 31, the first side wall portion 132 and the right end cover 15 are welded and fixed.

The fourth bent portion 331 of the right second fastening plate 33 is overlapped on the bottom wall of the right fastening seat 31 and the fourth bent portion 331 is adjacent to the left side plate of the right fastening seat 31, and then the position of the right second fastening plate 33 is adjusted such that the right second fastening plate 33 is arranged along the third side notch 1323. At this time, the fourth through hole 332 of the fourth bending portion 331 and the first mounting hole 213 of the right fixing seat 31 are coaxially disposed and communicated with each other, and the second positioning pin 491 side of the second pin positioning assembly 49 is inserted into the second mounting hole through the fourth through hole 332 and the first mounting hole 213, so as to position the right second fixing plate 33. And then the right second fixing plate 33, the right fixing seat 31 and the second side wall portion 133 are welded and fixed.

Step six:

with reference to fig. 13, 4 and 5, the left top plate 26 is fixedly disposed above the left three fixing plates 24, the left first fixing plate 22, the left fixing seat 21, the left second fixing plate 23 and the first protrusion 121, so that the second positioning protrusion 242 of the left three fixing plates 24 is embedded in the second positioning hole 161 of the left top plate 26, and the positioning of the left top plate 26 is achieved. And then the left top plate 26 is pressed by the third lifting press head 40 of the clamp 4, and the left top plate 26, the left first fixing plate 22, the left fixing seat 21 and the left second fixing plate 23 are welded and fixed.

The right top plate 34 is fixedly placed above the right first fixing plate 32, the right fixing seat 31 and the right second fixing plate 33, then the right top plate 34 is pressed by two fourth lifting rams 400 of the fixture 4, and the right top plate 34, the right first fixing plate 32, the right fixing seat 31 and the right second fixing plate 33 are welded and fixed.

Finally, the welded frame rail assembly is removed from the jig 4.

To sum up, the utility model discloses a bottom plate, front bezel and back plate enclose to close and form the tubulose and set up left branch strut and right branch strut on the tubulose, and the rear wheel arch baffle of being convenient for sets up on left branch strut and right branch strut, is favorable to the height of frame of falling the end under the prerequisite of cooperation rear wheel height, is convenient for reduce the focus of car, improves its security. The utility model discloses still through the roof portion that first bellying and second bellying on the setting front bezel all exceed the back plate, the roof portion that the upper portion of end cover exceeds the back plate about setting up simultaneously, the support frame about the lateral fixation of being convenient for is convenient for improve the joint strength of support frame about to whole beam assembly's structural strength. The utility model discloses again through arranging the tip of back plate, front bezel respectively along the nick that corresponds, existing quick location that is favorable to improving between each part compares with the method of confirming each part position through various measuring tools among the prior art, the utility model has the advantages of save time, raise the efficiency.

Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, and are not intended to limit the scope of the present invention, as those skilled in the art will appreciate that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended to cover all such modifications, equivalents, and improvements as fall within the true spirit and scope of the invention.

Claims (6)

1. A frame rail assembly, comprising:

the beam body assembly comprises a bottom plate, a front plate, a rear plate, a left end cover and a right end cover, wherein the front plate and the rear plate are arranged on two sides of the bottom plate along the front-rear direction, the rear plate comprises a top wall part, a first side wall part and a second side wall part, the top wall part is arranged between the first side wall part and the second side wall part, the top wall part is positioned above the bottom plate, the second side wall part is connected with the front plate, two ends of the front plate are respectively provided with a first protruding part and a second protruding part, in the vertical direction, the first protruding part and the second protruding part are higher than the top wall part, the left end cover and the right end cover are arranged at two ends of the bottom plate along the left-right direction, and in the vertical direction, the upper parts of the left end cover and the right end cover are higher than the top wall part;

the left supporting frame is arranged at the left end of the top wall part, and the left supporting part is fixedly connected with the first protruding part and the left end cover respectively;

the right supporting frame is arranged at the right end of the top wall part and is fixedly connected with the second protruding part and the right end cover respectively.

2. The frame rail assembly of claim 1, wherein:

the top wall portion is sequentially provided with a first position nick and a second position nick along the extending direction of the top wall portion, the first side wall portion is provided with a first side nick, a second side nick, a third side nick and a fourth side nick along the extending direction of the first side wall portion in an arrayed manner, the first side nick and the second side nick are located on the left side and the right side of the first position nick, and the third side nick and the fourth side nick are located on the left side and the right side of the second position nick.

3. The frame rail assembly of claim 1, wherein:

the left end cover is provided with a left front plate nick, a left rear plate nick and a left fixed plate nick, and the left rear plate nick is positioned between the left front plate nick and the left fixed plate nick;

the right end is covered and is provided with right front bezel nick, right back plate nick and a right fixed plate nick, right back plate nick is located right front bezel nick with between the right fixed plate nick.

4. The frame rail assembly of claim 1, wherein:

the left support frame comprises a left fixed seat, a left first fixed plate, a left second fixed plate, a left third fixed plate, a left fourth fixed plate and a left top plate, the left first fixed plate, the left fixed seat and the left second fixed plate are sequentially arranged along the left-right direction, the left fixed seat is arranged on the top wall part, and the left first fixed plate and the left second fixed plate are respectively and fixedly connected with the first side wall part;

the left first fixing plate, the left third fixing plate and the left fourth fixing plate are arranged in a front-back direction, the left third fixing plate is obliquely arranged in a left-right direction, two ends of the left third fixing plate respectively extend towards the first boss and the left end cover, and the left fourth fixing plate is arranged on the left third fixing plate and extends back to the left first fixing plate;

the left top plate is arranged above the first left fixing plate, the second left fixing plate, the third left fixing plate, the fourth left fixing plate and the first protruding portion.

5. The frame rail assembly of claim 4, wherein:

the left end of the top wall part is provided with a first positioning hole, the bottom wall of the left three fixing plates is provided with a first positioning bulge, and the first positioning bulge is arranged in the first positioning hole;

the left top plate is provided with a second positioning hole, the top wall of the left three fixing plates is provided with a second positioning bulge, and the second positioning bulge is arranged in the second positioning hole.

6. The frame rail assembly of claim 1, wherein:

the right supporting frame comprises a right fixed seat, a right first fixed plate, a right second fixed plate and a right top plate, the right first fixed plate, the right fixed seat and the right second fixed plate are sequentially arranged along the left-right direction, the right fixed seat is arranged on the top wall part, and the right first fixed plate and the right second fixed plate are respectively and fixedly connected with the first side wall part;

the right top plate is arranged above the right fixing plate, the right fixing seat, the right two fixing plates and the second bulge.

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