SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a rear floor structure and an automobile for solving the above technical problems, which are beneficial to improving the torsional rigidity of the automobile, improving the control capability and braking capability of the automobile chassis, and improving the quality and safety of the automobile.
A rear floor structure comprising:
the support is of an integrally formed structure, and the upper cross beam of the rear floor is of a hydraulic forming tubular structure; the two ends of the upper cross beam of the rear floor are respectively provided with the bracket, and the bracket is erected at the end part of the upper cross beam of the rear floor.
The back floor structure that this embodiment provided includes back floor entablature and support, and the support is integrated into one piece structure, and back floor entablature is the tubular structure of hydraulic forming. The traditional upper cross beam of the rear floor is generally made of stamping steel, and the upper cross beam of the rear floor of the embodiment is formed by a hydraulic forming process. Compared with the traditional stamping process, the part manufactured by the hydraulic forming process has obvious advantages in the aspects of rigidity, strength and the like, and the strength and the rigidity of the upper cross beam of the rear floor are greatly improved. The traditional support is formed by screwing or welding two branch supports, the rigidity and the strength of the combined support at a connecting point are poor, the support provided by the embodiment is of an integrally formed structure, and the integrally formed support structure has good rigidity and strength due to the fact that the connecting point does not exist, so that the integral rigidity and the strength of a rear floor structure are improved, the torsional rigidity of an automobile is further improved, the control capability and the braking capability of an automobile chassis are improved, and the quality of the automobile is improved.
In addition, in the design of the rear floor structure in the traditional automobile industry, the upper cross beam of the rear floor generally protrudes towards the roof, and the design can cause the ground of the rear floor to protrude and also occupy the inner space of the automobile. However, in this embodiment, since the rear floor upper cross beam is a hydraulic forming pipe, a corresponding mold can be designed as required when the rear floor upper cross beam is manufactured, and when a hollow pipe with a shape and precision meeting technical requirements is obtained, it is ensured that the produced rear floor is protruded in a direction deviating from the roof, so that the space in the vehicle is not occupied, and the space in the vehicle is favorably enlarged.
The technical solution is further explained below:
in one embodiment, the rear floor upper cross beam comprises a cross beam main body and first bent parts, wherein the first bent parts are arranged at two ends of the cross beam main body, and are of arc-shaped tubular structures and are bent upwards.
In one embodiment, one surface of the first bent portion, which faces away from the main beam body, is connected to the bracket, and the first bent portion is welded to the bracket. The first bending part is connected to the bracket in a spot welding mode.
In one embodiment, the rear floor structure further comprises two wheel covers, the two wheel covers are respectively arranged at two ends of the rear floor upper cross beam, and the support is arranged on one surface, facing the rear floor upper cross beam, of the wheel covers. The wheel cover is internally provided with tires, and the upper beam of the rear floor and the wheel cover can be connected by any one of bolts, electric welding and laser welding.
In one embodiment, the rear floor structure further comprises two rear longitudinal beams, the two rear longitudinal beams are respectively arranged at two ends of the rear floor upper cross beam, the end part of the rear floor upper cross beam is connected to the middle part of the rear longitudinal beam, and the length direction of the rear longitudinal beam is crossed with the length direction of the rear floor upper cross beam; one surface of the wheel cover facing the upper cross beam of the rear floor is attached to the side surface of the rear longitudinal beam along the length direction of the rear longitudinal beam.
In one embodiment, the rear floor structure further comprises a rear anti-collision beam, the rear anti-collision beam is parallel to the rear floor upper cross beam, and one end of the rear longitudinal beam, which extends out of the rear floor upper cross beam, is connected to the rear anti-collision beam. The rear longitudinal beam is connected to the rear anti-collision beam in a spot welding, bolt or laser welding mode. The rear anti-collision beam, the section of the rear longitudinal beam, which is close to the rear anti-collision beam, the upper cross beam of the rear floor and the wheel cover are used as paths for transmitting collision energy, so that the energy generated by collision can be dispersed and digested by the parts, the use safety of the automobile is improved, and the personal safety is guaranteed.
In one embodiment, the rear floor upper cross beam is a steel pipe, and the rear longitudinal beam is an aluminum extruded section.
In one embodiment, the rear floor structure further comprises two suspension mounting reinforcing plates; the two suspension mounting reinforcing plates are respectively arranged on the rear floor upper cross beam and are close to the bracket, and the rear floor upper cross beam, the suspension mounting reinforcing plates and the wheel cover form a rigid stress structure, so that the strength and the rigidity of the wheel cover are enhanced, and the torsional rigidity of the wheel cover is further improved.
In one embodiment, an automobile comprises the rear floor structure according to any one of the above embodiments, the rear floor structure is arranged at the bottom of the automobile, and the automobile body is a steel body, an aluminum alloy body or a mixed material body.
In one embodiment, the vehicle is a fuel-powered vehicle, a new energy vehicle or a hybrid vehicle.
The automobile at least has the following beneficial effects:
the automobile that this embodiment provided includes the back floor structure of any above-mentioned embodiment, back floor structure includes back floor entablature and support, and the support is integrated into one piece structure, and back floor entablature is the hydraulic forming tubular structure, and the part that the hydraulic forming technology was made has obvious advantage in aspects such as rigidity and intensity, has improved the intensity and the rigidity of back floor entablature greatly. The integrally formed support structure has better rigidity and strength due to no connection point, thereby being beneficial to improving the integral rigidity and strength of the rear floor structure, further improving the torsional rigidity of the automobile, improving the control capability and braking capability of the automobile chassis and improving the quality and safety of the automobile.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The embodiment provides a rear floor structure and an automobile, which have the advantages of being beneficial to improving the torsional rigidity of the automobile, improving the control capability and the braking capability of an automobile chassis and improving the quality and the safety of the automobile, and will be described in detail with reference to the attached drawings.
In one embodiment, referring to fig. 2 and 3, a rear floor structure includes a rear floor upper beam 100 and a bracket 200. The support 200 is an integrally formed structure, and the upper cross beam 100 of the rear floor is a hydraulic forming tubular structure. The two ends of the rear floor upper cross beam 100 are respectively provided with a bracket 200, and the brackets 200 are erected at the ends of the rear floor upper cross beam 100.
The hydraulic forming is also called internal high pressure forming or hydraulic forming, and the basic principle of the hydraulic forming is that a pipe is used as a blank, and when ultrahigh pressure liquid is applied to the inside of the pipe, axial thrust is applied to two ends of the pipe blank to supplement materials. Under the combined action of the two external forces, the tube blank material is subjected to plastic deformation and finally attached to the inner wall of the mold cavity, so that the hollow part with the shape and the precision meeting the technical requirements is obtained. The hydroforming can integrally form a hollow structural member having a variable cross-section along the member at a time.
The punching process is based on the plastic deformation of metal and includes four basic steps of punching, bending, stretching and local forming. Compared with a stamping and welding process, the hydroforming technology has the following main advantages: firstly, the mass is reduced, and materials are saved; and secondly, the number of parts and dies is reduced, and the die cost is reduced. Hydroformed parts generally require only one set of dies, while stamped parts mostly require multiple sets of dies; thirdly, the welding amount of subsequent machining and assembly can be reduced; fourthly, strength and rigidity are improved; fifthly, the production cost is reduced, the production cost of the hydroformed part is averagely reduced by 15-20% compared with that of a stamping part, and the die cost is reduced by 20-30%.
In addition, in the design of the rear floor structure in the conventional automobile industry, as shown in fig. 1, the rear floor upper cross beam 1 of the conventional automobile is generally connected with the brackets 2 arranged at the two ends of the rear floor upper cross beam 1 by spot welding, each bracket 2 comprises two connected branch brackets (see a branch bracket 21 and a branch bracket 22 in fig. 1), one surface of each bracket 2, which is far away from the rear floor upper cross beam 1, is connected with the wheel housing 3, and the rigidity and the strength of the rear floor structure are limited, and the torsional rigidity of the automobile body is poor. As shown in fig. 1, the rear floor upper cross member 1 of the conventional automobile is generally protruded toward the roof, and this design causes the ground of the rear floor to be protruded and also occupies the inner space of the automobile.
However, in this embodiment, since the rear floor upper cross beam 100 is a hydraulic forming pipe, a corresponding mold can be designed as required when the rear floor upper cross beam 100 is manufactured, and when a hollow pipe with a shape and precision meeting technical requirements is obtained, it is ensured that the produced rear floor is protruded in a direction deviating from the roof, so that the space in the vehicle is not occupied, and the space in the vehicle is favorably enlarged.
Referring to fig. 2 and 3, the rear floor structure of the present embodiment includes a rear floor upper cross member 100 and a bracket 200, wherein the bracket 200 is an integrally formed structure, and the rear floor upper cross member 100 is a hydraulic-formed tubular structure. The conventional rear floor upper cross member 100 is generally made of stamped steel, and the rear floor upper cross member 100 of the embodiment is formed by a hydraulic forming process. Compared with the traditional stamping process, the part manufactured by the hydraulic forming process has obvious advantages in the aspects of rigidity, strength and the like, and the strength and rigidity of the upper cross beam 100 of the rear floor are greatly improved. The traditional support 200 is formed by screwing or welding two branch supports 200, the rigidity and the strength of the combined support 200 at the connecting point are poor, the support 200 provided by the embodiment is of an integrally formed structure, and the integrally formed support 200 structure has good rigidity and strength due to the fact that the connecting point does not exist, so that the integral rigidity and the strength of the rear floor structure are improved, the torsional rigidity of an automobile is further improved, the control capability and the braking capability of an automobile chassis are improved, and the quality of the automobile is improved.
In one embodiment, referring to fig. 2 and 3, the rear floor upper cross beam 100 includes a cross beam main body 110 and a first bent portion 120. The two ends of the beam main body 110 are both provided with a first bending portion 120, and the first bending portion 120 is an arc-shaped tubular structure and is bent upwards. One surface of the first bent portion 120 departing from the beam main body 110 is connected to the bracket 200, and the first bent portion 120 is welded to the bracket 200. Specifically, the first bent portion 120 is connected to the bracket 200 by spot welding. Spot welding is a welding method in which a welding spot is formed between the contact surfaces of two overlapped workpieces by using a columnar electrode during welding. During spot welding, the workpiece is pressed to be in close contact with the workpiece, then current is switched on, the contact position of the workpiece is melted under the action of resistance heat, and a welding spot is formed after cooling. Spot welding is one type of resistance welding, and is mainly used for welding sheet structures, reinforcing bars and the like. In particular, spot welding is mainly used for welding sheet member stamping parts with the thickness of less than 4mm, and is particularly suitable for welding automobile bodies, carriages and airplane fuselages. The heating time to the connecting area is very short during spot welding, and the welding speed is high. Spot welding consumes only electrical energy and does not require filler materials or solder, gases, etc. The spot welding also has the advantages of simple operation, high mechanization and automation degree, high production efficiency, low labor intensity and good labor condition.
Further, referring to fig. 2 and 3, the rear floor structure further includes two wheel covers 300, the two wheel covers 300 are respectively disposed at two ends of the rear floor upper cross beam 100, and the bracket 200 is disposed on a surface of the wheel cover 300 facing the rear floor upper cross beam 100. Specifically, the wheel house 300 is provided with tires, and the rear floor upper cross member 100 and the wheel house 300 may be connected by any one of bolts, electric welding, and laser welding.
In one embodiment, referring to fig. 2 and 3, the rear floor structure further includes two rear longitudinal beams 400, the two rear longitudinal beams 400 are respectively disposed at two ends of the rear floor upper cross beam 100, an end portion of the rear floor upper cross beam 100 is connected to a middle portion of the rear longitudinal beam 400, and a length direction of the rear longitudinal beam 400 intersects with a length direction of the rear floor upper cross beam 100. One surface of the wheel house 300 facing the rear floor upper cross member 100 is attached to a side surface of the rear side member 400 in the longitudinal direction thereof. In the present embodiment, one rear floor upper cross member 100 is interposed between two rear side members 400, and the rear side members 400 and the rear floor upper cross member 100 may be connected by spot welding or by bolts or laser welding. Further, the rear floor structure further includes a rear anti-collision beam 500, the rear anti-collision beam 500 is parallel to the rear floor upper cross beam 100, and one end of the rear longitudinal beam 400 extending out of the rear floor upper cross beam 100 is connected to the rear anti-collision beam 500. That is, the ends of the two rear longitudinal beams 400 are connected to the rear impact beam 500 by spot welding or by bolt or laser welding. When the automobile has a rear-end collision accident, the rear anti-collision beam 500 is firstly impacted, and then energy generated by the impact is transmitted to the rear longitudinal beam 400, the rear floor upper cross beam 100 and the wheel cover 300, so that the energy generated by the impact can be dispersed and digested by a plurality of parts, the use safety of the automobile is improved, and the personal safety is guaranteed.
In one embodiment, referring to fig. 2 and 3, the rear floor structure further includes two suspension mounting reinforcing plates 600, and the suspension mounting reinforcing plates 600 are provided. The two suspension mounting reinforcing plates 600 are respectively provided on the rear floor upper cross member 100 and adjacent to the bracket 200. The connection mode of the rear floor upper cross member 100 and the suspension mounting reinforcing plate 600 may be spot welding, or may be bolt or laser welding. The rear floor upper cross member 100, the suspension mounting reinforcing plate 600 and the wheel house 300 form a rigid stressed structure, which is beneficial to enhancing the strength and rigidity of the wheel house 300, and further improving the torsional rigidity of the wheel house 300. In addition, the rear anti-collision beam 500, the rear floor upper cross beam 100, the wheel cover 300 and the suspension mounting reinforcing plate 600 of the rear longitudinal beam 400 close to the rear anti-collision beam 500 can also be used as a path for transmitting collision energy, so that the energy generated by collision can be dispersed and digested by the parts, thereby being beneficial to improving the use safety of the automobile and ensuring the personal safety.
In one embodiment, referring to fig. 2 and 3, the rear floor upper cross member 100 is a hydroformed steel tube and the rear side member 400 is an aluminum extruded profile. The hydroformed steel tube has obvious advantages in the aspects of rigidity, strength and the like, the strength and rigidity of the upper cross beam 100 of the rear floor are greatly improved, the torsional rigidity of the automobile is further improved, the control capability and the braking capability of the automobile chassis are improved, and the quality and the safety of the automobile are improved. The rear side member 400 is formed of an aluminum extruded section, and the aluminum has a component of an aluminum structure that performs the same function as that of other metal structures by about half, so that the aluminum extruded section can reduce the cost. During production, workers can use the aluminum profiles at places where strength is required to be increased, and the aluminum profiles are removed at places where the strength is not required, namely, the structural efficiency of the aluminum extruded profiles is high. The aluminum extruded section also has the advantages of less machining, light weight, high strength, durability and strong corrosion resistance.
In one embodiment, referring to fig. 2 and 3, an automobile includes a rear floor structure according to any one of the above embodiments, the rear floor structure is disposed at the bottom of the automobile, and the automobile is a fuel automobile, a new energy automobile or a hybrid automobile. Because the automobile provided by the embodiment comprises the rear floor structure described in any one of the above embodiments, the rear floor structure comprises the rear floor upper cross beam 100 and the bracket 200, the bracket 200 is an integrally formed structure, the rear floor upper cross beam 100 is a hydraulic forming tubular structure, parts manufactured by a hydraulic forming process have obvious advantages in the aspects of rigidity, strength and the like, and the strength and rigidity of the rear floor upper cross beam 100 are greatly improved. The integrally formed support 200 structure has better rigidity and strength due to the absence of connection points, thereby being beneficial to improving the overall rigidity and strength of the rear floor structure, further improving the torsional rigidity of the automobile, improving the control capability and braking capability of the automobile chassis, and improving the quality and safety of the automobile.
Further, the body of the automobile is a steel body, an aluminum alloy body, or a hybrid body, and is not particularly limited herein.
The rear floor structure provided by the embodiment comprises a rear floor upper beam 100 and a support 200, wherein the support 200 is an integrally formed structure, and the rear floor upper beam 100 is a hydraulic forming tubular structure. The conventional rear floor upper cross member 100 is generally made of stamped steel, and the rear floor upper cross member 100 of the embodiment is formed by a hydraulic forming process. Compared with the traditional stamping process, the part manufactured by the hydraulic forming process has obvious advantages in the aspects of rigidity, strength and the like, and the strength and rigidity of the upper cross beam 100 of the rear floor are greatly improved. The traditional support 200 is formed by screwing or welding two branch supports 200, the rigidity and the strength of the combined support 200 at the connecting point are poor, the support 200 provided by the embodiment is of an integrally formed structure, and the integrally formed support 200 structure has good rigidity and strength due to the fact that the connecting point does not exist, so that the integral rigidity and the strength of the rear floor structure are improved, the torsional rigidity of an automobile is further improved, the control capability and the braking capability of an automobile chassis are improved, and the quality of the automobile is improved.
In addition, in the design of the rear floor structure in the conventional automobile industry, the rear floor upper cross beam 100 generally protrudes towards the roof, and the design can cause the ground of the rear floor to protrude and occupy the inner space of the automobile. However, in this embodiment, since the rear floor upper cross beam 100 is a hydraulic forming pipe, a corresponding mold can be designed as required when the rear floor upper cross beam 100 is manufactured, and when a hollow pipe with a shape and precision meeting technical requirements is obtained, it is ensured that the produced rear floor is protruded in a direction deviating from the roof, so that the space in the vehicle is not occupied, and the space in the vehicle is favorably enlarged.
In addition, one section of the rear anti-collision beam 500 and the rear longitudinal beam 400 close to the rear anti-collision beam 500, the rear floor upper cross beam 100 and the wheel cover 300 are used as paths for transferring impact energy, so that the energy generated by impact can be dispersed and digested by the parts, the use safety of the automobile is improved, and the personal safety is guaranteed. The rear floor upper cross member 100, the suspension mounting reinforcing plate 600 and the wheel house 300 form a rigid stressed structure, which is beneficial to enhancing the strength and rigidity of the wheel house 300, and further improving the torsional rigidity of the wheel house 300.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.