CN210101759U - Automobile body unloading body - Google Patents
Automobile body unloading body Download PDFInfo
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- CN210101759U CN210101759U CN201920720237.5U CN201920720237U CN210101759U CN 210101759 U CN210101759 U CN 210101759U CN 201920720237 U CN201920720237 U CN 201920720237U CN 210101759 U CN210101759 U CN 210101759U
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Abstract
The utility model relates to a car body down, it includes the load frame that forms by welding in proper order front beam, right threshold roof beam, rear beam and left threshold roof beam, still including setting up crossbeam, main longeron and the auxiliary girder in this load frame. In addition, the reinforced transition plate is welded right below the cross beam. One end of the reinforcing transition plate is welded to the left threshold beam, and the other end is welded to the right threshold beam. The main longitudinal beam crosses over from the right below of the reinforced transition plate, one end of the main longitudinal beam is welded on the front cross beam, the other end of the main longitudinal beam is welded on the rear cross beam, and the top wall of the main longitudinal beam is welded with the bottom wall of the reinforced transition plate. And welding the auxiliary longitudinal beam and the free edge of the reinforced transition plate. In the actual operation process of the automobile, a part of longitudinal force is transmitted to the reinforcing transition plate through the main longitudinal beam and the auxiliary longitudinal beam and then transmitted to the cross beam again, so that the longitudinal force is equally divided along the length direction of the cross beam, the phenomenon that the longitudinal force is concentrated in some local areas is avoided, and the risk of deformation of the cross beam is effectively reduced.
Description
Technical Field
The utility model belongs to the technical field of the automobile body structure manufacturing technology and specifically relates to an automobile body is car body down.
Background
The lower body of the automobile is an important component of the frame, plays an important role in bearing, is in a frame-shaped structure, and is internally provided with longitudinal beams and transverse beams which are criss-cross. The more common design forms are: two ends of the cross beam are respectively abutted against and welded to the left and right threshold beams; one end of the longitudinal beam is abutted against and welded to the front cross beam or the rear cross beam, and the other end of the longitudinal beam is abutted against and welded to the side wall of the cross beam (as shown in fig. 1). In addition, in the consideration of the scheme of the whole automobile weight reduction design, the cross beam and the longitudinal beam both adopt a rectangular box structure form. The automobile body bears great stress and impact force under the automobile body in the actual operation process of the automobile, and the phenomenon that the side wall of the cross beam bulges or is sunken occurs sometimes, so that the connection strength of the welding part is reduced, and the driving safety of the automobile is affected. Thus, a skilled person is urgently needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a automobile body lower automobile body that structural design is simple, structural strength is high.
In order to solve the technical problem, the utility model relates to a car body down, it includes the load frame that forms by welding in proper order front beam, right threshold roof beam, rear beam and left threshold roof beam, still including setting up crossbeam, main longeron and the auxiliary longeron in this load frame. The auxiliary longitudinal beams are symmetrically arranged on the left side and the right side of the main longitudinal beam, and the auxiliary longitudinal beams further comprise reinforcing transition plates welded right below the cross beam. One end of the reinforcing transition plate is welded to the left threshold beam, and the other end is welded to the right threshold beam. The reinforcing transition plate has a width larger than that of the cross member to form free edges at front and rear sides thereof. The main longitudinal beam crosses over from the right below of the reinforced transition plate, one end of the main longitudinal beam is welded on the front cross beam, the other end of the main longitudinal beam is welded on the rear cross beam, and the top wall of the main longitudinal beam is welded with the bottom wall of the reinforced transition plate. And welding the auxiliary longitudinal beam with the free edge.
As a further improvement of the technical scheme, a first crossing groove is formed in the bottom wall of the reinforcing transition plate, so that the main longitudinal beam can cross. The unilateral clearance between the first penetrating groove and the main longitudinal beam is controlled to be 3-5 mm.
As a further improvement of the technical scheme, the end part of the auxiliary longitudinal beam is provided with a right-angle notch so as to be convenient for realizing the welding of the auxiliary longitudinal beam with the side wall and the top wall of the free edge.
As a further improvement of the technical scheme, the lower automobile body of the automobile body further comprises a short cross beam transversely arranged right above the main longitudinal beam. The two ends of the short beam are welded with the auxiliary longitudinal beam, and the bottom wall of the short beam is also welded on the main longitudinal beam.
As a further improvement of the technical scheme, a second crossing groove is formed in the bottom wall of the short cross beam and is used for the main longitudinal beam to cross. The unilateral clearance between the second penetrating groove and the main longitudinal beam is controlled to be 3-5 mm.
As a further improvement of the technical proposal, the width of the free edge is not less than 15 mm.
As a further improvement of the technical scheme, the number of the cross beams is 2, and the cross beams are respectively a first cross beam and a second cross beam which are arranged in parallel at intervals. At least one force transmission beam is arranged between the two cross beams. One end of the force transfer beam is welded to the first cross beam, the other end of the force transfer beam is welded to the second cross beam, and the bottom wall and the free edge of the force transfer beam are welded.
As a further improvement of the technical scheme, the lower automobile body of the automobile body further comprises diagonal reinforcing beams, the number of the diagonal reinforcing beams is set to be 4, and the diagonal reinforcing beams are arranged at 4 corners of the bearing outer frame.
Compare in traditional design scheme the utility model discloses an in the structure of automobile body lower automobile body, add and strengthen the cab apron. The main longitudinal beam and the auxiliary longitudinal beam are both directly welded on the reinforcing transition plate. In the actual operation process of the automobile, a part of longitudinal force is transmitted to the reinforcing transition plate through the main longitudinal beam and the auxiliary longitudinal beam and then transmitted to the cross beam again, so that the longitudinal force is equally divided along the length direction of the cross beam, the phenomenon that the longitudinal force is concentrated in some local areas is avoided, the risk of deformation of the cross beam is effectively reduced, and the safety of the automobile in the driving process is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a partial view of a lower body of a prior art automotive body (i.e., a schematic view of the connection of a cross member to main and auxiliary side rails).
Fig. 2 is a schematic perspective view of the lower body of the middle automobile body of the present invention.
Fig. 3 is a front view of the lower body of the middle automobile body.
Fig. 4 is a plan view of the lower body of the car body of the present invention.
Fig. 5 is an enlarged view of part I of fig. 2.
Fig. 6 is a partial enlarged view II of fig. 2.
1-a front cross beam; 2-right sill beam; 3-rear cross beam; 4-left sill beam; 5-a cross beam; 51-a first beam; 52-a second beam; 6-main longitudinal beam; 7-auxiliary longitudinal beams; 71-right angle notches; 8-reinforcing transition plates; 81-free edge; 82-a first pass-through groove; 9-short beam; 91-a second pass through groove; 10-a force transfer beam; and 11-diagonal tension stiffening beam.
Detailed Description
In the following description, the front-rear direction refers to the vehicle length direction, and the direction in which the vehicle advances is referred to as the front, and the direction in which the vehicle retreats is referred to as the rear. The left-right direction is a vehicle width direction, and left and right directions when the driver faces forward are referred to as left and right directions, respectively. The vertical direction is a vehicle height direction, and the direction on the ground side is set to be downward and the direction on the opposite side is set to be upward with respect to the vehicle. This is merely for convenience in describing the invention and to simplify the description, and is not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be considered limiting of the invention.
The following description is made in detail with reference to the specific embodiments, and fig. 2, fig. 3, and fig. 4 respectively show the three-dimensional schematic view, the front view, and the top view of the lower body of the middle automobile body of the present invention, which is composed of several parts, such as the front beam 1, the right threshold beam 2, the rear beam 3, the left threshold beam 4, the cross beam 5, the main longitudinal beam 6, the auxiliary longitudinal beam 7, and the reinforced transition plate 8, wherein the front beam 1, the right threshold beam 2, the rear beam 3, and the left threshold beam 4 are welded in sequence as the force-bearing frame, and the cross beam is welded to the left and right side walls of the force-bearing frame (i.e. the opposite side walls of the left threshold beam 4 and the right threshold beam 2), and the main longitudinal beam 6 is welded to the front and rear side walls of the force-bearing frame (i.e. the opposite side walls of the front beam 1 and the rear. The length and the direction of the reinforcing transition plate 8 are consistent with those of the cross beam 5, and the reinforcing transition plate is welded on the bottom wall of the cross beam 5. One end of the reinforcing transition plate 8 is welded to the left rocker beam 4 and the other end is welded to the right rocker beam 2. It is important to note here that the width of the reinforcing transition plate 8 needs to be greater than the width of the cross beam 5, so that, when it is welded to the cross beam 5, it is possible to form free edges 81 (as shown in fig. 5) on its own front and rear sides. The main longitudinal beam 6 passes right under the reinforcing transition plate 8, one end portion thereof is welded to the front cross member 1, the other end portion thereof is welded to the rear cross member 3, and the top wall thereof is welded to the bottom wall of the reinforcing transition plate 8. The auxiliary longitudinal beam 7 is abutted against the free edge 81 and welded into a whole. In the actual running process of the automobile, a part of longitudinal force is transmitted to the reinforcing transition plate 8 through the main longitudinal beam 6 and the auxiliary longitudinal beam 7 and then transmitted to the cross beam 5 again through the reinforcing transition plate 8, so that the longitudinal force is uniformly distributed along the length direction of the cross beam, the phenomenon that the longitudinal force is concentrated in some local areas is avoided, the risk of deformation of the cross beam 5 is effectively reduced, and the safety of the automobile in the running process is improved.
In a preferred embodiment, the number of the cross beams 5 is 2, and the cross beams are a first cross beam 51 and a second cross beam 52 which are arranged in parallel and spaced apart from each other. At least one force transmission beam 10 (shown in fig. 5) is provided between the above-described first and second cross members 51 and 52. One end of the force transmission beam 10 is welded to the first cross member 51, the other end is welded to the second cross member 52, and the bottom wall thereof is welded to the free edge 81. In this way, the structural strength of the lower body of the automobile body is ensured, and the implementation of light weight design is ensured as much as possible.
It is particularly emphasized that the reinforcing transition plate 8 and the cross beam 5 must be fully welded together, and fully penetration welded, so as to improve the reliability and stability of the connection therebetween. In addition, when the materials of the reinforcing transition plate 8 and the cross beam 5 are selected, the materials with better fatigue resistance are preferably selected, and the mechanical properties of the materials selected by the reinforcing transition plate 8 and the cross beam 5 are close to each other as much as possible, so that the deformation rates of the reinforcing transition plate 8 and the cross beam 5 tend to be consistent, and the cracks of the welding seams are effectively prevented.
As a further optimization of the structure of the lower body of the automobile body, a first passing groove 82 (as shown in fig. 5) may be further formed in the bottom wall of the reinforced transition plate 8 for the main longitudinal beam 6 to pass through, and by adopting the technical scheme, the transverse force of the main longitudinal beam 6 acting on the reinforced transition plate 8 is mainly borne by the side wall of the first passing groove 82, so that the welding seam arranged between the main longitudinal beam and the reinforced transition plate only bears the longitudinal tensile force, and the welding seam is prevented from being affected by the cross force, thereby improving the reliability and stability of the connection between the main longitudinal beam 6 and the reinforced transition plate 8. Further optimization, a welding gap is reserved on two sides of the first through groove 82 in advance according to a specific welding process, and the unilateral gap is generally controlled to be 3-5 mm.
Furthermore, a right-angle notch 71 (as shown in fig. 5) may be provided at the end of the auxiliary longitudinal beam 7 to facilitate welding with the side wall and the top wall of the free edge 82, thereby improving the connection reliability of the auxiliary longitudinal beam 7 and the reinforcing transition plate 8. As a further optimization, the welding mode of the auxiliary longitudinal beam 7 and the reinforcing transition plate 8 is also set to be a full welding mode.
In order to further improve the structural strength of the lower automobile body of the automobile body, a short cross beam 9 for connecting two parallel auxiliary longitudinal beams 7 can be additionally arranged. The short cross beam 9 is transversely arranged right above the main longitudinal beam 6, and the short cross beam and the main longitudinal beam are welded and fixed in a full-length welding mode. As a further optimization of the design structure, similar to the design form of the reinforced transition plate 8, a groove may also be formed on the bottom wall of the short cross beam 9, and for the convenience of distinguishing from the first crossing groove, it is named as a second crossing groove 91 (as shown in fig. 6) for the main longitudinal beam 6 to cross. The unilateral clearance between the second penetrating groove 91 and the main longitudinal beam 6 is also preferably controlled to be 3-5 mm.
Further, in order to reduce the connection rigidity of the main side member 6, the sub side member 7 and the reinforcing transition plate 8 and to improve the fatigue resistance, as a further optimization of the above-described lower body of the automobile body, the width of the one side of the free edge 81 provided at the reinforcing transition plate 8 should not be less than 15 mm.
Finally, diagonal reinforcing ribs 11 can be welded at 4 corner positions of the bearing outer frame, so that the structural strength of the lower automobile body of the automobile body is further improved, and the service life of the lower automobile body is prolonged.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The lower automobile body of the automobile comprises a force-bearing outer frame, a cross beam, a main longitudinal beam and an auxiliary longitudinal beam, wherein the force-bearing outer frame is formed by sequentially welding a front cross beam, a right threshold beam, a rear cross beam and a left threshold beam; the auxiliary longitudinal beams are symmetrically arranged on the left side and the right side of the main longitudinal beam, and the auxiliary longitudinal beams are characterized by further comprising reinforcing transition plates welded right below the cross beam, one end of each reinforcing transition plate is welded to the left threshold beam, and the other end of each reinforcing transition plate is welded to the right threshold beam; the width of the reinforcing transition plate is larger than that of the cross beam so as to form free edges at the front side and the rear side of the reinforcing transition plate; the main longitudinal beam crosses over from the right below of the reinforced transition plate, one end of the main longitudinal beam is welded on the front cross beam, the other end of the main longitudinal beam is welded on the rear cross beam, and the top wall of the main longitudinal beam is welded with the bottom wall of the reinforced transition plate; and the auxiliary longitudinal beam is welded with the free edge.
2. The automobile body lower body according to claim 1, wherein a first passing groove is formed in a bottom wall of the reinforcing transition plate for the main longitudinal beam to pass through; and the unilateral clearance between the first penetrating groove and the main longitudinal beam is controlled to be 3-5 mm.
3. The vehicle body lower body according to claim 1, wherein a right-angle notch is provided at an end portion of the auxiliary side member so as to facilitate welding thereof to the side wall and the top wall of the free edge.
4. The automobile body lower body according to claim 1, further comprising a short cross member disposed transversely directly above the main longitudinal member; the two end parts of the short cross beam are welded with the auxiliary longitudinal beam, and the bottom wall of the short cross beam is also welded on the main longitudinal beam.
5. The automobile body lower body according to claim 4, wherein a second passing groove is formed in a bottom wall of the short cross beam for the main longitudinal beam to pass through; and the unilateral clearance between the second penetrating groove and the main longitudinal beam is controlled to be 3-5 mm.
6. The automobile underbody according to claim 1, wherein the width of the free edge is not less than 15 mm.
7. The automobile underbody according to any one of claims 1 to 6, wherein the number of the cross members is set to 2, and the number of the cross members is a first cross member and a second cross member which are arranged in parallel and spaced apart from each other; at least one force transmission beam is arranged between the two cross beams; one end of the force transfer beam is welded to the first cross beam, the other end of the force transfer beam is welded to the second cross beam, and the bottom wall of the force transfer beam is welded to the free edge.
8. The automobile body lower body according to claim 7, further comprising a cable-stayed reinforcing beam, wherein the number of the cable-stayed reinforcing beam is 4, and the cable-stayed reinforcing beam is arranged at 4 corners of the force-bearing outer frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920720237.5U CN210101759U (en) | 2019-05-20 | 2019-05-20 | Automobile body unloading body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920720237.5U CN210101759U (en) | 2019-05-20 | 2019-05-20 | Automobile body unloading body |
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| Publication Number | Publication Date |
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| CN210101759U true CN210101759U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920720237.5U Active CN210101759U (en) | 2019-05-20 | 2019-05-20 | Automobile body unloading body |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111976846A (en) * | 2020-08-27 | 2020-11-24 | 徐州徐工矿业机械有限公司 | Cargo compartment bottom plate device based on lightweight technology |
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2019
- 2019-05-20 CN CN201920720237.5U patent/CN210101759U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111976846A (en) * | 2020-08-27 | 2020-11-24 | 徐州徐工矿业机械有限公司 | Cargo compartment bottom plate device based on lightweight technology |
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