US 12,233,921 B2
Rail train
Liqing Ding, Tangshan (CN); Li Xiong, Tangshan (CN); Guoyan Gao, Tangshan (CN); Huanying Jia, Tangshan (CN); Shuai Yang, Tangshan (CN); Liwei Shen, Tangshan (CN); Juanjuan Wu, Tangshan (CN); Haichao Lu, Tangshan (CN); Fanshuai Meng, Tangshan (CN); Guopeng Hu, Tangshan (CN); Xuling Gao, Tangshan (CN); and Chen Liu, Tangshan (CN)
Assigned to CRRC TANGSHAN CO., LTD., Tangshan (CN)
Filed by CRRC TANGSHAN CO., LTD., Tangshan (CN)
Filed on Sep. 20, 2021, as Appl. No. 17/478,976.
Application 17/478,976 is a continuation of application No. PCT/CN2019/090853, filed on Jun. 12, 2019.
Prior Publication US 2022/0001903 A1, Jan. 6, 2022
Int. Cl. B61D 17/12 (2006.01); B61D 17/18 (2006.01)
CPC B61D 17/12 (2013.01) [B61D 17/18 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A rail train, comprising:
a semi-enclosed air duct, and the semi-enclosed air duct comprises an air duct top and an air duct side; the air duct top is fixed with an inner top of a rail train body, the air duct side is connected on both sides of the air duct top and extends downward;
a large side top, and the large side top is fixed to the rail train body as a part of a rail train roof, and the large side top is top-sealed at a bottom of the air duct side to form an air passage with the air duct;
a middle roof, and the middle roof is fixed between a left air duct and a right air duct as a middle part of the rail train roof; and
an L-shaped connecting angle code; a first corner arm of the L-shaped connecting angle code and an inner top of a lower layer rail train body are fixed, a second corner arm of the L-shaped connecting angle code and a side of a lower large side top close to the lower layer rail train body are fixed, so as to top-seal the lower large side top on a bottom of a side of a lower layer air duct;
wherein: a first mounting groove is arranged in an inner top of the lower layer rail train body; the first corner arm of the L-shaped connecting angle code and the inner top of the lower layer rail train body are fixed by the first mounting groove, bolts and nuts; and a plurality of oblong holes are provided along a length direction on a side of the lower large side top close to a side of the rail train body.