Flatbed truck and its underframe

Abstract

The present invention provides a flatbed truck, which includes two side beams and two end beams vertically connected to the two ends of the side beams. Each side beam and each end beam are of channel steel structure and each includes two wing plates and a web plate connected between the two wing plates. The included angle between the end face of the wing plate of each side beam and the plane where the web plate of this side beam is located is an α angle, and the α angle is an acute angle; the included angle between the end face of the wing plate of each end beam and the plane where the web plate of this end beam is located is a β angle, and the β angle is an acute angle; the wing plates of the side beams and the wing plates of the end beams are flush-spliced, the end face of the wing plate of the side beam is butt-jointed and fixed with the end face of the wing plate of the end beam, and the web plate of the side beam and the web plate of the end beam are perpendicular to each other. The present invention changes the connection mode between the end beam and the side beam of the flatbed truck chassis. Moreover, the end face welding of the present invention is easier than the traditional right-angle insertion welding, reduces the welding difficulty, saves the welding man-hours, and improves the product quality.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and particularly to a flatbed truck and its chassis. Background Art

[0002] The flatbed truck mainly includes: two longitudinally parallel main beams, a front end beam transversely welded at the front ends of the two main beams, a rear end beam transversely welded at the rear ends of the two main beams, multiple cross beams located between the front end beam and the rear end beam and transversely and spacedly welded on the two main beams, and two side beams respectively arranged on the outermost sides of both sides of the chassis and welded together at the transverse two ends. The front end beam, the rear end beam and the two side beams are welded to each other to form the outer frame of the flatbed truck chassis.

[0003] Currently, the structures of the front and rear end beams and the side beams of flatbed trucks on the market are all channel steel structures, and the connection is a right-angle insertion connection, that is, the side beam is entirely inserted into the channel-shaped structures of the front end beam and the rear end beam, the two wing plates of the side beam are in upper and lower contact with the end beam, and then fixed by double-sided welding. This manufacturing method has a large working intensity, a large welding area, a large welding workload, a large environmental pollution, a long production operation line, and poor product quality. Summary of the Invention

[0004] The purpose of the present invention is to provide a flatbed truck and its chassis to solve the problems in the prior art.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides a flatbed truck chassis, including two side beams and two end beams vertically connected to both ends of the side beams. Each side beam and each end beam are channel steel structures, each including two wing plates and a web connecting between the two wing plates. The included angle between the end face of the wing plate of each side beam and the plane where the web of the side beam is located is an α angle, and the α angle is an acute angle; the included angle between the end face of the wing plate of each end beam and the plane where the web of the end beam is located is a β angle, and the β angle is an acute angle; the wing plates of the side beam and the wing plates of the end beam are flush spliced, the end face of the wing plate of the side beam and the end face of the wing plate of the end beam are butt-jointed and fixed, and the web of the side beam and the web of the end beam are perpendicular to each other.

[0007] Preferably, the sum of the α angle and the β angle is 90 degrees.

[0008] Preferably, the α angle is 45 degrees and the β angle is 45 degrees.

[0009] Preferably, an outer reinforcing member is further provided at the connection between the end beam and the side beam, and the outer reinforcing member is connected to the outer sides of the webs of the end beam and the side beam.

[0010] Preferably, the outer reinforcing member is in an L shape and includes two outer reinforcing plates perpendicular to each other. Each outer reinforcing plate is respectively in contact with the web and welded or bolted.

[0011] Preferably, the outer reinforcing member is a steel member, an aluminum member or a non-metallic formed member.

[0012] Preferably, an inner reinforcing member is further provided at the connection between the end beam and the side beam, and the inner reinforcing member is connected to the inner sides of the webs of the end beam and the side beam.

[0013] Preferably, the inner reinforcing member is in an L shape and includes two inner reinforcing plates perpendicular to each other, and each inner reinforcing plate is respectively attached to and welded to the web.

[0014] Preferably, the inner reinforcing member is an angle steel.

[0015] The present invention further provides a flatbed truck, including the flatbed truck chassis as described above.

[0016] As can be seen from the above technical solutions, the advantages and positive effects of the present invention are as follows: By splicing the flange of the side beam flush with the flange of the end beam, docking and fixing the end face of the flange of the side beam with the end face of the flange of the end beam, and making the web of the side beam perpendicular to the web of the end beam, the connection mode between the end beam and the side beam of the flatbed truck chassis is changed. And the end face welding of the present invention is easier than the traditional right-angle insertion welding, reducing the welding difficulty of the flatbed truck, saving welding man-hours, and improving the product quality. Brief Description of the Drawings

[0017] Figure 1 is a schematic diagram of the flatbed truck chassis of the present invention.

[0018] Figure 2 is a rear view of the flatbed truck chassis of the present invention.

[0019] Figure 3 is an enlarged view of the connection between the end beam and the side beam in the flatbed truck chassis of the present invention.

[0020] Figure 4 is a schematic diagram of the side beam in the preferred embodiment of the flatbed truck chassis of the present invention.

[0021] Figure 5 is a schematic diagram of the end beam in the preferred embodiment of the flatbed truck chassis of the present invention.

[0022] Among them, the reference numerals are explained as follows: 1, flatbed truck chassis; 11, side beam; 111, flange; 112, web; 12, end beam; 121, flange; 122, web; 13, outer reinforcing member; 131, outer reinforcing plate. Detailed Description of the Invention

[0023] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments, all of which do not depart from the scope of the present invention, and the descriptions and illustrations therein are for illustrative purposes in nature and not intended to limit the present invention.

[0024] To further illustrate the principle and structure of the present invention, the preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] Referring to Figures 1 - 3 , the present invention provides a flatbed car chassis 1, including two side beams 11 and two end beams 12 vertically connected to both ends of the side beams 11.

[0026] Referring to Figure 4 , the side beam 11 is of channel steel structure, including two wing plates 111 and a web 112 connected between the two wing plates 111. The included angle between the end face of the wing plate 111 and the plane where the web 112 is located is an α angle, and the α angle is an acute angle.

[0027] Referring to Figure 5 , the end beam 12 is of channel steel structure, including two wing plates 121 and a web 122 connected between the two wing plates 121. The included angle between the end face of the wing plate 121 and the plane where the web 122 is located is a β angle, and the β angle is an acute angle.

[0028] The wing plate 111 of the side beam 11 is flush-spliced with the wing plate 121 of the end beam 12, the end face of the wing plate 111 of the side beam 11 is butt-fixed to the end face of the wing plate 121 of the end beam 12, and the web 112 of the side beam 11 is perpendicular to the web 122 of the end beam 12, thereby realizing the mutual welding of the side beam 11 and the end beam 12 and enclosing the outer frame of the flatbed car chassis 1.

[0029] Specifically, the sum of the α angle and the β angle is 90 degrees. Ensure that after the butt-jointed end faces are spliced, the two webs are exactly perpendicular to each other. In this embodiment, α is 45 degrees and β is 45 degrees. In other embodiments, α can be 30 degrees and β can be 60 degrees; or α can be 60 degrees and β can be 30 degrees, as long as the sum of the two is 90 degrees. In addition, the sum of the α angle and the β angle can also be slightly less than 90 degrees, and during welding, solder is used to fill in the gaps to fix the two end faces together by welding.

[0030] To increase the strength of the structure of the flatbed car chassis 1, an external reinforcing member 13 is also provided at the connection between the end beam 12 and the side beam 11. Referring to Figure 3, the external reinforcing member 13 is connected to the outer sides of the web 122 of the end beam 12 and the web 112 of the side beam 11. Specifically, the external reinforcing member 13 is L-shaped and includes two external reinforcing plates 131 perpendicular to each other. Each external reinforcing plate 131 is respectively connected to the web in a fitting manner, that is, one external reinforcing plate 131 is connected to the web 122 of the end beam 12 in a fitting manner, and the other external reinforcing plate 131 is connected to the web 112 of the side beam 11 in a fitting manner. The external reinforcing member 13 is fixed to the connection between the end beam 12 and the side beam 11 by welding or bolt connection. Preferably, the external reinforcing member 13 is a steel member, an aluminum member or a non-metallic molded member.

[0031] To increase the strength of the flat car underframe 1 structure, an internal reinforcing member (not shown in the figure) can also be provided at the connection between the end beam 12 and the side beam 11. Similar to the external reinforcing member 13, the internal reinforcing member is connected to the inner sides of the web 122 of the end beam 12 and the web 112 of the side beam 11. Specifically, the internal reinforcing member is L-shaped and includes two internal reinforcing plates perpendicular to each other. Each internal reinforcing plate is respectively connected to the web in a fitting manner, that is, one internal reinforcing plate is connected to the web 122 of the end beam 12 in a fitting manner, and the other internal reinforcing plate is connected to the web 112 of the side beam 11 in a fitting manner. The internal reinforcing member is welded and fixed to the connection between the end beam 12 and the side beam 11. Preferably, the internal reinforcing member is an angle steel.

[0032] In this embodiment, both an external reinforcing member 13 and an internal reinforcing member are provided at the connection between the end beam 12 and the side beam 11 of the flat car underframe 1. In other embodiments, according to the required strength and stiffness of the flat car underframe 1 structure, only the external reinforcing member 13 or only the internal reinforcing member can be provided separately.

[0033] When assembling the flat car underframe 1, first, the end face of the flange 111 of the side beam 11 is butted against the end face of the flange 121 of the end beam 12, and the web 112 of the side beam 11 is perpendicular to the web 122 of the end beam 12. The flange 111 of the side beam 11 and the flange 121 of the end beam 12 are flush and spliced, and then welding is carried out to weld the butted end faces to realize the mutual welding of the side beam 11 and the end beam 12 and enclose the outer frame of the flat car underframe 1. To increase the strength of the flat car underframe 1 structure, an external reinforcing member 13 or an internal reinforcing member or both an external reinforcing member 13 and an internal reinforcing member can also be provided at the connection between the end beam 12 and the side beam 11.

[0034] The present invention also provides a flat car, including the flat car underframe 1 as described above.

[0035] As can be seen from the above technical solution, the advantages and positive effects of the present invention are as follows: In the present invention, the wing plates of the side beams are flush-spliced with the wing plates of the end beams, the end faces of the wing plates of the side beams are butt-jointed and fixed with the end faces of the wing plates of the end beams, and the webs of the side beams are perpendicular to the webs of the end beams, thus changing the connection mode between the end beams and the side beams of the flatbed car chassis. Moreover, the end-face welding of the present invention is easier than the traditional right-angle insertion welding, reducing the welding difficulty of the flatbed car, saving welding man-hours, and improving the product quality.

[0036] The above is only a preferred feasible embodiment of the present invention, and does not limit the protection scope of the present invention. Any equivalent structural changes made by using the content of the specification and drawings of the present invention are included in the protection scope of the present invention.

Claims

1. A flatbed car chassis, comprising two side beams and two end beams vertically connected to both ends of the side beams. Each side beam and each end beam are of channel steel structure and each includes two wing plates and a web plate connected between the two wing plates. It is characterized in that, The angle between the end face of the flange of each side beam and the plane where the web of the side beam is located is the α angle, and the α angle is an acute angle; the angle between the end face of the flange of each end beam and the plane where the web of the end beam is located is the β angle, and the β angle is an acute angle. The sum of the α angle and the β angle is less than or equal to 90 degrees. An external reinforcing member is also provided at the connection between the end beam and the side beam, and the external reinforcing member is connected to the outer sides of the webs of the end beam and the side beam. The flanges of the side beam and the end beam are flush-spliced, the end face of the flange of the side beam is butt-fixed to the end face of the flange of the end beam, and the web of the side beam and the web of the end beam are perpendicular to each other.

2. The flatbed chassis according to claim 1, characterized in that, The α angle is 45 degrees, and the β angle is 45 degrees.

3. The flatbed chassis according to claim 1, characterized in that, The external reinforcing member is in an L shape and includes two mutually perpendicular external reinforcing plates. Each external reinforcing plate is respectively attached to and welded or bolted to the web.

4. The flatbed vehicle underframe according to claim 3, characterized in that, The external reinforcing member is a steel member, an aluminum member or a non-metallic formed member.

5. The flatbed chassis according to any one of claims 1 to 4, characterized in that An internal reinforcing member is also provided at the connection between the end beam and the side beam, and the internal reinforcing member is connected to the inner sides of the webs of the end beam and the side beam.

6. The flatbed vehicle underframe according to claim 5, characterized in that, The internal reinforcing member is in an L shape and includes two mutually perpendicular internal reinforcing plates. Each internal reinforcing plate is respectively attached to and welded to the web.

7. The flat car underframe according to claim 6, characterized in that, The internal reinforcing member is an angle steel.

8. A flatbed truck, characterized in that, It includes a flat car underframe according to any one of claims 1 to 7.

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