Patent Publication Number: US-2019168783-A1

Title: Vehicle Body Structure and Rail Train with Vehicle Body

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application is related to and claims the benefit of Chinese Patent Application Number 201810433981.7 filed on May 8, 2018, the contents of which are incorporated herein by reference in their entirety. 
     TECHNICAL FIELD 
     Embodiments of the present disclosure relate to a field of an air-conditioning ventilation design of vehicle, and in particular to a vehicle body structure and a rail train with the vehicle body. 
     BACKGROUND 
     A train air-conditioning unit and an air supply device are generally disposed at the top of a carriage, and an air supply duct is connected with the air-conditioning unit. This vehicle air duct system adopts an air supply form having a top static pressure chamber, and is not provided with an independent return air duct. This air-conditioning system does not facilitate the requirement of a high-speed train for low center of gravity, and the vehicle air duct system is bad in uniformity of micro air speed and temperature distribution. Moreover, airflow at an air supply opening of the existing vehicle air duct system is easily eddied, thereby not facilitating the airflow guide effect of an air duct on airflow. Furthermore, the existing vehicle air duct system is non-detachable, thus causing the problem of difficulty in detection or repair of the air duct. 
     SUMMARY 
     A main objective of the present disclosure is to provide a vehicle body structure and a rail train with the vehicle body, intended to solve the problem in the conventional art of difficulty in detection or repair of the air duct. 
     To achieve the above objective, according to an aspect of the present disclosure, a vehicle body structure is provided. The vehicle body structure includes a vehicle body; an air duct, the air duct being provided at a bottom of the vehicle body, and the air duct having a maintenance port; and a maintenance portion, the maintenance portion being connected with the air duct and located at the maintenance port, and the maintenance portion having an opening position for opening the maintenance port and a closing position for closing the maintenance port. 
     In some embodiments, wherein the air duct includes: a main air duct, the main air duct being provided along a length direction of the vehicle body, and an air supply opening being provided in a middle of the main air duct; and a branch air duct, the branch air duct being provided along a width direction of the vehicle body, a first end of the branch air duct being communicated with the main air duct, and a second end of the branch air duct having an air outlet for communicating with an interior of the vehicle body. 
     In some embodiments, wherein the main air duct and/or the branch air duct are/is provided with the maintenance portion. 
     In some embodiments, further including: a guide portion, the guide portion being provided in the air duct to guide or distribute airflow in the air duct. 
     In some embodiments, wherein the guide portion includes: a first guide plate, the first guide plate being provided at the air supply opening and located in the air duct, and/or the first guide plate being provided at a joint between the main air duct and the branch air duct and located in the air duct, wherein, the first guide plate being a herringbone guide plate. 
     In some embodiments, wherein a second end, provided with the air outlet, of the branch air duct is an arc-shaped structure, and the guide portion includes: a second guide plate, the second guide plate being provided in the second end of the branch air duct to divide the second end of the branch air duct into at least two independent air outlet ducts. 
     In some embodiments, wherein the air supply opening and/or the air outlet are/is provided with a flange, a seal ring being provided in the flange. 
     In some embodiments, wherein there are a plurality of branch air ducts, the plurality of branch air ducts being provided at intervals along the length direction of the vehicle body. 
     In some embodiments, wherein the plurality of branch air ducts are symmetrically provided on two sides of the main air duct. 
     In some embodiments, wherein the air duct includes: a return air duct, a first end of the return air duct being communicated with the main air duct, and a second end of the return air duct being communicated with the interior of the vehicle body. 
     In some embodiments, wherein the maintenance portion is a maintenance cover plate, the maintenance cover plate being detachably provided at the maintenance port. 
     According to another aspect of the present disclosure, a rail train is provided. The rail train includes a vehicle body structure, the vehicle body structure being the above vehicle body structure. 
     According to the technical solution of the present disclosure, a maintenance portion is provided on an air duct at the bottom of a vehicle body. By operating the maintenance portion, a maintenance port of the air duct is at an opened or closing position, in order to detect or repair the interior of the air duct, thus prolonging the life of the air duct of the vehicle body structure and improving the reliability. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which constitute a part of this application, are used to provide a further understanding of the present disclosure, and the exemplary embodiments of the present disclosure and the description thereof are used to explain the present disclosure, but do not constitute improper limitations to the present disclosure. In the drawings: 
         FIG. 1  illustrates a structure diagram of a vehicle body structure according to embodiment 1 of the present disclosure; 
         FIG. 2  illustrates a longitudinal sectional structure diagram of a vehicle body structure according to embodiment 2 of the present disclosure; 
         FIG. 3  illustrates an enlarged structure diagram of part A in  FIG. 2 ; 
         FIG. 4  illustrates a horizontal sectional structure diagram of a vehicle body structure according to embodiment 3 of the present disclosure; and 
         FIG. 5  illustrates a horizontal sectional structure diagram of a vehicle body structure according to embodiment 4 of the present disclosure. 
     
    
    
     THE DRAWINGS INCLUDE THE FOLLOWING REFERENCE SIGNS 
       10 : air duct;  11 : main air duct;  111 : air supply opening;  12 : branch air duct;  121 : air outlet;  13 : maintenance portion;  14 : return air duct; 
       20 : guide portion;  21 : first guide plate;  22 : second guide plate; 
       30 : flange. 
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     It is to be noted that in the case of no conflict, the features in the embodiments and the embodiments in the present application may be combined with each other. The present disclosure is described below with reference to the drawings and in conjunction with the embodiments in detail. 
     It is to be noted that terms used herein only aim to describe specific implementation manners, and are not intended to limit exemplar implementations of this application. Unless otherwise directed by the context, singular forms of terms used herein are intended to include plural forms. Besides, it will be also appreciated that when terms “contain” and/or “include” are used in the description, it is indicated that features, steps, operations, devices, assemblies and/or a combination thereof exist. 
     As shown in  FIG. 1  to  FIG. 5 , according to an embodiment of the present disclosure, a vehicle body structure is provided. 
     Specifically, as shown in  FIG. 1 , the vehicle body structure includes: a vehicle body, an air duct  10  and a maintenance portion  13 . The air duct  10  is disposed at the bottom of the vehicle body. The air duct  10  has a maintenance port. The maintenance portion  13  is connected with the air duct  10  and located at the maintenance port. The maintenance portion  13  has an opening position for opening the maintenance port and a closing position for closing the maintenance port. 
     In the present embodiment, a maintenance portion is provided on an air duct at the bottom of a vehicle body. By operating the maintenance portion, a maintenance port of the air duct is at an opened or closing position, in order to detect or repair the interior of the air duct, thus prolonging the life of the air duct of the vehicle body structure and improving the reliability. 
     In the present embodiment, the air duct  10  includes a main air duct  11  and a branch air duct  12 . The main air duct  11  is provided along a length direction of the vehicle body, and the middle of the main air duct  11  is provided with an air supply opening  111 . The branch air duct  12  is provided along a width direction of the vehicle body, a first end of the branch air duct  12  is communicated with the main air duct  11 , and a second end of the branch air duct  12  has an air outlet  121  for communicating with the interior of the vehicle body. By connecting the branch air duct to the main air duct, air generated by an air conditioner can be delivered into the vehicle body through the branch air duct in all directions, thereby improving the use experience of a user. 
     As shown in  FIG. 1 , the main air duct  11  or the branch air duct  12  is provided with the maintenance portion  13 . Of course, both the main air duct  11  and the branch air duct  12  may be provided with the maintenance portions  13 . Such arrangement enables the main air duct  11  and the branch air duct  12  to be detected or repaired by the maintenance portions, thus prolonging the life of the air duct of the vehicle body structure and improving the reliability. 
     As shown in  FIG. 2 , the vehicle body structure further includes a guide portion  20 , the guide portion  20  being disposed in the air duct  10  to guide or distribute airflow in the air duct  10 . Such arrangement avoids an eddy at the air supply opening, thus improving the flowing stability of airflow in the air duct. 
     As shown in  FIG. 3 , the guide portion  20  includes a first guide plate  21 . The first guide plate  21  is disposed at the air supply opening  111  and located in the air duct  10 , and/or the first guide plate  21  is disposed at a joint between the main air duct  11  and the branch air duct  12  and located in the air duct  10 , wherein the first guide plate  21  is a herringbone guide plate. The herringbone guide plate distributes airflow at the air supply opening and avoids an eddy, thus improving the flowing stability of airflow in the air duct. 
     As shown in  FIG. 2 ,  FIG. 4  and  FIG. 5 , the second end, provided with the air outlet  121 , of the branch air duct  12  is an arc-shaped structure, and the guide portion  20  includes a second guide plate  22 , the second guide plate  22  being disposed in the second end of the branch air duct  12  to divide the second end of the branch air duct  12  into at least two independent air outlet ducts. The second guide plate here may be an arc-shaped guide plate, and there is at least one arc-shaped guide plate. Such arrangement enables the second guide plate namely the arc-shaped guide plate to directionally guide airflow and avoids an eddy. 
     As shown in  FIG. 1 , the air supply opening  111  or the air outlet  121  is provided with a flange  30 . Of course, they may be both provided with a flange. A seal ring is provided in the flange  30 . Such arrangement achieves firm mounting of a pipeline communicated with the air supply opening and the air outlet, and good sealing performance. 
     In the present embodiment, there are multiple branch air ducts  12 , the multiple branch air ducts  12  being provided at intervals along the length direction of the vehicle body. By connecting the multiple branch air ducts to the main air duct, air generated by an air conditioner can be delivered into the vehicle body through the branch air duct in all directions, thereby improving the use experience of a user. 
     In the present embodiment, the multiple branch air ducts  12  are symmetrically disposed on two sides of the main air duct  11 . Such arrangement facilitates mounting of the branch air duct  12 , and improves the stability of airflow in the air duct. 
     As shown in  FIG. 1 , the air duct  10  includes a return air duct  14 . A first end of the return air duct  14  is communicated with the main air duct  11 , and a second end of the return air duct  14  is communicated with the interior of the vehicle body. At least one end of the return air duct is provided with a flange, in order to mount the return air duct. Such arrangement enables interior airflow in the vehicle body to return into the air conditioner through the return air duct. 
     In the present embodiment, the maintenance portion  13  is a maintenance cover plate. The maintenance cover plate is detachably disposed at the maintenance port. The maintenance cover plate is connected to a pipeline wall on the periphery of the maintenance port in a fastening connection manner, and a rubber pad is disposed in the maintenance cover plate to improve the sealing performance of connection between the maintenance cover plate and the maintenance port. 
     The vehicle body structure of the above embodiments may also be used for the technical field of rail traffic. That is to say, according to another aspect of the present disclosure, a rail train is provided. The rail train includes a vehicle body structure, and the vehicle body structure is the vehicle body structure in the above embodiments. 
     In the present embodiments, the vehicle body structure provides the air duct at the bottom of the vehicle body, thereby saving the interior space of the vehicle, and improving the ride comfort of a passenger. It is applied to a small-section vehicle model. The air duct is compact in structure and convenient to mount, facilitates effective utilization of a vehicle space, and facilitates maintenance of an air duct system. 
     In the above embodiment, descriptions of each embodiment are emphasized respectively, and parts which are not elaborated in detail in a certain embodiment may refer to relevant descriptions of other embodiments. 
     The above is only the preferred embodiments of the present disclosure, not intended to limit the present disclosure. As will occur to those skilled in the art, the present disclosure is susceptible to various modifications and changes. Any modifications, equivalent replacements, improvements and the like made within the spirit and principle of the present disclosure shall fall within the scope of protection of the present disclosure.