[0052] Example two
[0053] See Figure 7 , Picture 8 with Picture 9 The second embodiment provides a semi-trailer frame, and also adopts the above-mentioned technical structure relationship; for example: the second embodiment provides a semi-trailer frame including a rear lower wing plate 10 and a suspension member 40; The lower wing plate 10 includes a lower wing plate portion 11 and two lower wing plate side plate portions 12, the two lower wing plate side plate portions 12 are located on opposite sides of the lower wing plate plate portion 11, forming The cross section is a U-shaped structure; the opening of the U-shaped rear lower wing plate 10 is set upward or downward, and the flat plate portion 11 of the lower wing plate is connected to the suspension 40.
[0054] The main structure of the semi-trailer frame provided in the second embodiment is the same as that of the semi-trailer frame in the first embodiment; however, the semi-trailer frame provided in the second embodiment also involves specific structural design. This second embodiment is different from the above-mentioned first embodiment: the semi-trailer frame in the second embodiment has more specific design features for specific structures; for example: the specific structure of the rear lower wing plate 10; in addition, its Also added some preferred technical features.
[0055] The specific structure and technical effects of the technical solution of the second embodiment are as follows:
[0056] The flat plate portion 11 of the lower wing plate and the suspension member 40 are preferably fixed by welding, and the connection is stronger.
[0057] In the specific structure of the rear lower wing panel 10, the flat section 11 of the lower wing panel and the two side panel parts 12 of the lower wing panel are connected by a smooth curved surface; obviously, the smooth transition of the curved surface can make the rear lower wing panel 10 The self-strength is greater, which further alleviates the fracture of the rear lower wing plate 10 at the connection between the lower wing plate portion 11 and the suspension 40.
[0058] Preferably, the U-shaped rear lower wing plate 10 is defined as being opened downwardly.
[0059] It should be noted that the opening of the rear lower wing plate 10 is downward, so that the suspension 40 is connected to the surface of the lower wing plate portion 11 at the inner side of the U shape, which is more conducive to improving the connection between the lower wing plate portion 11 and the suspension piece 40 The strength to withstand the stress further alleviates the prone to fracture of the connection.
[0060] In addition, in the prior art, the lower wing panel is an integral plate-like structure with multiple bends; among them, the connection between the gooseneck lower wing panel and the rear lower wing panel is one of the bends. The stress at the bend is relatively large, and the strength of the lower wing plate of the plate-like structure is poor, and it is very easy to break at the bend.
[0061] Therefore, in the second embodiment, in view of the above-mentioned situation, the gooseneck lower wing plate 20 and the rear lower wing plate 10 of the lower wing plate adopt a segmented structure. Among them, the gooseneck lower wing plate 20 still adopts the original plate-like structure. The gooseneck lower wing plate 20 penetrates into the U-shaped groove of the rear lower wing plate 10, and laps and fixes the gooseneck lower wing plate 20 with the lower surface of the lower wing plate portion 11 in the rear lower wing plate 10 (can be The use of welding); this way of overlapping and fixing the gooseneck lower wing plate 20 and the rear lower wing plate 10 can enhance the strength of the stress-bearing joint between the two, and further relieve the gooseneck lower wing plate 20 and the rear The joint of the lower wing plate 10 is prone to breakage.
[0062] In fact, the front end of the gooseneck lower wing panel 20 is also connected with a front lower wing panel 30.
[0063] In the prior art, the upper wing plate needs to be welded with the large traction beam and its corresponding side and the short beam on the corresponding side to achieve the purpose of fixing. However, because the upper wing plate is a thin plate-like structure, the welding seam welded to the large traction beam and the short beam is a thin straight line, and there is basically no structural support on the upper and lower sides of the welding seam; the weld is prone to fracture.
[0064] Therefore, in the second embodiment, for the above situation, see Picture 8 with Picture 9 , The upper wing plate 50 is also set to a U-shaped cross-section structure, wherein the upper wing plate flat portion 51 is the bottom surface of the U shape, and the two upper wing plate side plate portions 52 are the two sides of the U shape. . In order to adapt the upper wing panel 50 to other structures of the semi-trailer (for example, the floor of the carriage), the U-shaped upper wing panel 50 is set as a structure with a downward opening. Similarly, in combination with the structure of the lower wing plate described above, the upper wing plate flat portion 51 and the two upper wing plate side plate portions 52 are smoothly transitioned and connected by a curved surface to enhance the strength of the upper wing plate 50. At the same time, the arc surface joints of the upper wing plate portion 51 and the two upper wing plate side plate portions 52 are respectively welded to the corresponding side of the traction beam 60 and the short beam 70 on the corresponding side; further, at the arc surface connection The welding seam 53 on the side corresponding to the traction beam 60 and the welding seam 53 between the arc surface and the short beam 70 on the corresponding side form a welding area with a cross-section similar to a triangle; this triangle has a larger welding area, and There is an upper wing plate side plate 52 as a support underneath it, so it alleviates the situation that the weld is prone to breakage.
[0065] In particular, see Picture 10 with Picture 11 An oblique support 80 is provided between the short beam 70 and the large traction beam 60, and the cross section of the oblique support 80 is Z-shaped. Compared with the oblique support with a C-shaped cross section in the prior art, the Z-shaped oblique support 80 provided in the second embodiment does not require edge cutting, reducing the manufacturing process; at the same time, it also reduces the force in the same direction. Increase in intensity.
[0066] Preferably, both the rear lower wing plate 10 and the upper wing plate 50 are made of channel steel.
