Semi-trailer girder and semi-trailer

[0046] Example one

[0047] See Figure 4 , Figure 5 with Image 6 , The first embodiment provides a semi-trailer girder structure, including a rear lower wing panel 10 and a suspension 40;

[0048] Wherein, the rear lower wing plate 10 includes a lower wing plate portion 11 and two lower wing plate side plate portions 12, and the two lower wing plate side plate portions 12 are located on two opposite sides of the lower wing plate plate portion 11 Side, forming a structure with a U-shaped cross section;

[0049] 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.

[0050] Analyzing the structure of the above-mentioned semi-trailer girder shows that it is mainly composed of the rear lower wing plate 10 and the suspension 40. Among them, the rear lower wing panel 10 further includes a lower wing plate flat portion 11 and two lower wing plate side plate portions 12, and the

[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 embodimen

[0067] Example three

[0068] Correspondingly, the third embodiment provides a semi-trailer, which includes the semi-trailer frame involved in the second embodiment (the specific structure of the semi-trailer frame will not be repeated one by one), and it also includes a tractor; a semi-trailer The beam is connected to the tractor.

[0069] Obviously, the semi-trailer provided by the present invention has all the advantages of the semi-trailer frame in the second embodiment above, and will not be repeated here. The rear lower wing plate 10 of the semi-trailer beam in the semi-trailer is not easily broken at the connection with the suspension member 40, and the service life is prolonged (see also the above in the second embodiment Picture 10 ).