Door corner structure of rail transit stainless steel vehicle body door area, vehicle body and method

Abstract

The invention discloses a door corner structure of a rail transit stainless steel vehicle body door area, a vehicle body and a method, solves the problems that in the prior art, a door corner reinforcing part at a vehicle door frame is unreasonable in structure arrangement and not easy to weld, and wall plate deformation is easily caused in the welding process, and has the beneficial effects that the structural strength of the door area is enhanced, and wall plate deformation is not caused. According to the specific scheme, the door corner structure of the rail transit stainless steel vehicle body door area comprises door corners arranged at the four corners of a vehicle door frame respectively, the door corners can be connected with wallboards on the outer side in a welded mode, each door corner is provided with a first face and an arc-shaped face, the bevel edge side of each first face is connected with the longer side of the corresponding arc-shaped face, and the first faces are flush with the outer surface of a door stand column; the first end of the door corner arc-shaped face and the first side of the first face are both connected with the vehicle door frame in a welded mode, the opposite side of the first end of the door corner arc-shaped face is the second end of the door corner arc-shaped face, and the second end of the door corner arc-shaped face and the second side of the first face are both connected with the vehicle door frame or the bottom frame in a welded mode.

Description

Technical Field

[0001] The invention relates to the field of rail transit, and in particular to a door corner structure of a door area of ​​a stainless steel vehicle body of rail transit, a vehicle body and a method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Rail transit vehicles often use multiple passenger compartment doors to facilitate passengers to get on and off the vehicle quickly. In addition, with the extension of the operating range and the gradual integration of subways and intercity vehicles, the vehicle operating speed has increased year by year. The operating conditions involve both underground and above ground, which puts higher requirements on the vehicle's airtight, watertight and other all-weather sealing performance.

[0004] Rail transit vehicles are mostly plate-beam structures. Figure 1 and Figure 2 As shown, the door column and the wall panel are mostly sealed by spot welding + sealant 7, forming multiple welding points 6 between the door column 3 and the wall panel 1, or by sealing fasteners 4 + sealing strips. Specifically, a connector 2 is provided on one side of the door column 3, and the connector is connected to the inner side of the wall panel by bolts 5. A sealing fastener is also provided between the connector and the wall panel. The above two sealing methods cannot meet the sealing requirements of the vehicle's full life cycle of 30 years, and regular maintenance is required. In addition, the stainless steel car bodies used in the rail vehicle industry are mostly unpainted surfaces, and the austenitic stainless steel material welding connection has large deformation, and the arc welding connection in the door corner area has large deformation and poor appearance, which affects the appearance of the vehicle.

[0005] In summary, the inventors have found that the rail transit vehicle body in the prior art cannot achieve full-life sealing of the passenger compartment steel structure door area. The specific reasons are as follows:

[0006] After the car body wall panel and the door pillar are spot welded, the door corner reinforcement is required to ensure the structural strength of the door corner stress mutation area. The structural setting of the door corner reinforcement 9 is unreasonable. Figure 3 As shown, the structure is complex, and multiple sides need to be welded (weld 10 is formed after welding). After the wall panel is spot welded, the space between the door corner reinforcement member and the wall panel is limited, and it is not easy to weld and fix the door corner reinforcement member at the door frame. Welding in a limited space affects the welding quality and structural strength.

[0007] The door corner reinforcement is separated from the wall panel, further affecting the structural strength of the door frame;

[0008] The door corner reinforcement is welded after the wall panels are spot welded. The high temperature generated during the welding process can easily cause the wall panels to deform, affecting the appearance of the wall panels and the sealing effect of the area.

[0009] The current forms of sealants and sealant strips are easily damaged;

[0010] The wall panels and door columns are of the curled welded joint type, which requires overhead welding under existing working conditions. This is difficult to operate and results in large deformation of the welded connection.

[0011] The door corner reinforcement exceeds the wall panel setting, and the appearance of the arc-sealed weld of the cold-work-hardened austenitic stainless steel of the door corner reinforcement does not meet the exposure requirements. Summary of the invention

[0012] In view of the shortcomings of the prior art, the first purpose of the present invention is to provide a door corner structure in the door area of ​​a stainless steel rail transit vehicle body, which can bear force together with the wall panels, door frames and base frames, effectively enhancing the structural strength of the four corners of the door frames.

[0013] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0014] A door corner structure of a door area of ​​a rail transit stainless steel vehicle body, including door corners respectively arranged at four corners of a door frame, the door corners can be welded to an outer wall panel, the door corner has a first surface and a curved surface, the hypotenuse side of the first surface is connected to a longer side of the curved surface, the first surface is flush with the outer surface of a door column, the curved surface is bent toward the center of the door frame, the first end of the door corner curved surface and the first side of the first surface are both welded to the door frame, the opposite side of the first end of the door corner curved surface is the second end of the door corner curved surface, the first side of the first surface is vertically connected to the second side of the first surface, and the second end of the door corner curved surface and the second side of the first surface are both welded to the door frame or a chassis.

[0015] The door corner structure as described above, by setting the door corners at the four corners of the vehicle door frame, the setting of the door corners effectively enhances the strength between the two upper corners of the vehicle door frame and the lower side of the vehicle door frame and the bottom frame, and the first surface of the door corner can be flush with the door pillar, so the door corners can be set at the four corners of the vehicle door frame first, and the door corners can be welded to the wall panel, so that at the four corners of the vehicle door frame, a unified force system of the vehicle door frame, door corner and wall panel is formed, or a unified force system of the door pillar, bottom frame, door corner and wall panel is formed, which not only does not cause deformation of the wall panel, but also effectively enhances the structural strength of the vehicle door frame at the four corners, and ensures the reliability and sealing of the connection between the wall panel and the door corner.

[0016] As described above, a door corner structure of a door area of ​​a stainless steel rail transit vehicle body, the oblique cross-section of the door corner is L-shaped, the opposite side of the first surface of the door corner is hollow, and the interior of the door corner is also hollow, that is, the arc surface of the door corner is bent relative to the first surface to ensure the structural strength of the four corners of the door frame.

[0017] The door corner structure of the door area of ​​a stainless steel rail transit vehicle body as described above comprises an upper door corner and a lower door corner, the upper door corner is fixed between the upper door crossbeam and the top side of the door pillar in the door frame, and the lower door corner is fixed between the bottom side of the door pillar and the base frame.

[0018] The door corner structure of the door area of ​​a stainless steel rail transit vehicle body as described above, taking into account that the upper door beam and the outer surface of the door column are not on the same plane, in order to ensure the welding connection between the upper door corner and the wall panel, the spacing distance between the first end of the upper door corner arc surface and the first side of the upper door corner first surface is set so that one side of the upper door corner can be stuck on the upper door beam.

[0019] A door corner structure of a rail transit stainless steel vehicle door area as described above, wherein the first end of the upper door corner arc surface is welded to the lower surface of the door upper cross beam, and the first side of the upper door corner first surface is welded to the outer surface of the door upper cross beam;

[0020] The second end of the arcuate surface of the upper door corner is welded to the inner surface of the door column, and the second side of the first surface of the upper door corner is welded to the first rounded transition section of the door column. The first rounded transition section is located between the outer surface and the inner surface of the door column, so as to ensure that the first surface is flush with the outer surface of the door column, thereby ensuring the fit and welding effect with the wall panel.

[0021] A door corner structure of a rail transit stainless steel vehicle door area as described above, wherein the inner surface of the first end of the lower door corner arc surface is welded to the inner surface of the door column, and the first side of the first surface of the lower door corner is welded to the first rounded transition section of the door column, ensuring that the first surface of the lower door corner is flush with the outer surface of the door column;

[0022] The inner surface of the second end of the arc-shaped surface of the lower door corner is welded to the upper surface of the base frame, and the second side of the first surface of the lower door corner is welded to the second rounded transition section of the base frame to ensure that the first surface of the lower door corner is flush with the outer surface of the base frame;

[0023] Considering that the second end of the curved surface of the lower door corner and the second side of the first surface need to be connected to the base frame, the inner surface of the second end of the curved surface of the lower door corner and the second side of the first surface of the lower door corner are arranged in the same plane; or, the distance between the inner surface of the second end of the curved surface of the lower door corner and the second side of the first surface of the lower door corner is smaller than the distance between the first end of the curved surface of the lower door corner and the first side of the first surface of the lower door corner.

[0024] The door corner structure of the door area of ​​a rail transit stainless steel vehicle body as described above takes into account the appearance of the door corner and facilitates the welding connection between the door corner and the wall panel. The arc surface of the door corner is transitionally connected to the first surface through an arc transition section.

[0025] A door corner structure of a rail transit stainless steel vehicle body door area as described above, wherein the hypotenuse side of the first surface of the door corner is an arc segment;

[0026] The width of the door corner arc surface is smaller than the thickness of the door pillar, which effectively saves materials and can effectively ensure the structural strength of the door frame while controlling material costs.

[0027] As described above, a door corner structure of a door area of ​​a stainless steel rail transit vehicle body, wherein the door corner arc surface has a set thickness, the first end of the door corner arc surface is a slope side, the second end of the door corner arc surface is also a slope side, the angle between the first end of the door corner arc surface and the cross beam or door column on the door is an acute angle, and the angle between the second end of the door corner arc surface and the door column or base frame is an acute angle.

[0028] In the second aspect, the present invention also provides a rail transit stainless steel car body, including a wall panel and a door corner structure of a rail transit stainless steel car body door area, the wall panel is welded to the first surface of the door corner and the door column in sequence, so that the wall panel and the door column are connected by welding to ensure the sealing between the two.

[0029] The vehicle body provided above realizes full sealing between the door pillar and the side wall through welding connection, without the need for sealant and sealing strips. The door corner enables the wall panel located outside the door pillar to be welded to the door corner and the door pillar in sequence to realize full sealing of the door area.

[0030] In the above-mentioned stainless steel rail transit vehicle body, the wall panel is provided with an arc-shaped protrusion on the outside of the door corner, and the arc-shaped protrusion is welded to the first surface of the door corner;

[0031] The arc-shaped protrusion is arranged beyond the door corner along the lateral direction of the stainless steel body, and the arc-shaped protrusion is arranged in the reverse direction of the height of the stainless steel body and lower than the arc-shaped surface of the door corner.

[0032] In a third aspect, the present invention further provides a method for sealing a door area of ​​a rail transit stainless steel vehicle body, characterized in that the method adopts the rail transit stainless steel vehicle body, and includes the following contents:

[0033] Place the side wall unit of the stainless steel body connected with the door frame horizontally;

[0034] A door corner is provided at each of the four corners of the door frame;

[0035] The second end of each door corner arc surface is welded to the door frame or the bottom frame, and the second side of the first surface of the door corner is welded to the door frame or the bottom frame;

[0036] The first side of the first surface of each door corner is welded to the door frame, and the first end of the arc-shaped surface of the door corner is welded to the door frame;

[0037] Place the wall panel on the outside of the stainless steel body, and overlap the door pillars of the door frame;

[0038] Use laser welding to weld the wall panel to the upper door corner, then weld the wall panel to the door column, and finally weld the wall panel to the lower door corner;

[0039] Laser welding is used to weld the wall panels and the base frame.

[0040] The beneficial effects of the present invention are as follows:

[0041] 1) In the present invention, door corners are arranged at the four corners of the door frame. The arrangement of the door corners effectively enhances the strength between the two upper corners of the door frame and the lower side of the door frame and the bottom frame, and the first surface of the door corner is flush with the door pillar. Thus, the door corners can be arranged at the four corners of the door frame first, and the door corners can be welded to the wall panel. Not only will the deformation of the wall panel not be caused due to the later arrangement of the door corners, but also the reliability and sealing of the connection between the wall panel and the door corners can be effectively guaranteed.

[0042] 2) The door corner structure of the present invention is reasonably arranged, the door corner has an arcuate surface and a first surface, the two ends of the arcuate surface are respectively welded to the vehicle door frame or the chassis, the two sides of the first surface are respectively welded to the vehicle door frame or the chassis, and after the door corner is fixed, the first surface can be welded to the wall panel. The door corner does not need to be too complicated, and its setting function can be guaranteed by a simple arcuate surface and the first surface; in this way, a unified force-bearing system of the vehicle door frame, door corner and wall panel is formed at the four corners of the vehicle door frame, or a unified force-bearing system of the door column, chassis, door corner and wall panel is formed, thereby effectively enhancing the structural strength of the vehicle door frame at the four corners.

[0043] 3) The structure of the middle door corner in the present invention is simple, and only four sides of the door frame need to be welded, without excessive sides, and there is no need to weld all six sides of the door corner as in the prior art; and the door corner can be installed before the side wall is installed, which is convenient for welding the door corner.

[0044] 4) In the present invention, one side of the upper door angle is engaged with the upper cross beam of the door, and the second side of the first surface of the upper door angle is welded to the first rounded transition section of the door column, which fully utilizes the structural feature that the upper cross beam of the door and the outer surface of the door column are not in the same plane, and can ensure that the first surface of the upper door angle is flush with the outer surface of the door column, thereby ensuring the fitting and welding effect of the upper door angle and the wall panel.

[0045] 5) The lower door corner structure of the present invention is reasonably arranged, the first side of the first surface of the lower door corner is welded to the first rounded transition section of the door column, and the second side of the first surface is welded to the second rounded transition section of the base frame, which is convenient for processing and manufacturing and ensures that the first surface is flush with the outer surfaces of the door column and the base frame.

[0046] 6) The stainless steel body of the present invention is provided, and the wall panel is welded to the first surface of the door corner and the door column in sequence. In this way, the wall panel, the door column and the door corner can be connected as one through welding, so that there is no need to set sealant or sealing strip between the wall panel and the end side of the door column, thereby ensuring the sealing between the door column and the wall panel, and the welding quality is reliable, which can effectively meet the sealing requirements of the vehicle's full life cycle of 30 years and control the regular maintenance cost and maintenance time.

[0047] 7) In the present invention, the wall panels, door corners and door pillars can be welded to each other by laser welding at one time. The welding can be carried out when the side wall of the vehicle body is in a horizontal state. There is no need for overhead welding in the prior art. The operation is convenient and the welding deformation is small. The wall panels cover the door corners so that the weld seams are not exposed, thus avoiding the problem of large deformation of welding connections of austenitic stainless steel materials in the prior art. Moreover, laser welding can realize the design and manufacture of door area structures that meet the requirements of full-life sealing and excellent appearance.

[0048] 8) The sealing method provided by the present invention can ensure the structural strength of the door frame, avoid deformation of the wall panel, and facilitate welding. Ultimately, it can ensure the sealing of the connection between the door column, door corner and side wall, meeting the airtight and watertight requirements of high-speed and all-weather operation of rail vehicles. It is suitable for the full spectrum of stainless steel vehicle products and provides effective support and means for stainless steel vehicle bodies with high appearance quality and full-life sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0050] Figure 1 Schematic diagram of a sealing fastener provided between a side wall and a door column in the prior art.

[0051] Figure 2 The invention is a schematic diagram of the connection between the side wall and the door column by means of electric welding and sealant in the prior art.

[0052] Figure 3 This is a schematic diagram showing that door corner reinforcements need to be welded in the prior art.

[0053] Figure 4 It is a front view of a door corner structure of a door area of ​​a stainless steel rail transit vehicle body fixed to a door frame according to one or more embodiments of the present invention.

[0054] Figure 5 The present invention Figure 4 Schematic diagram of the CC section.

[0055] Figure 6 The present invention Figure 4Schematic diagram of the DD section.

[0056] Figure 7 It is a schematic diagram of the setting of the upper door corner in the door corner structure of the door area of ​​a stainless steel vehicle body of rail transit according to one or more embodiments of the present invention.

[0057] Figure 8 It is a schematic diagram of the setting of the lower door corner in the door corner structure of the door area of ​​a stainless steel vehicle body of rail transit according to one or more embodiments of the present invention.

[0058] Fig. 9 It is a schematic diagram of a door corner structure of a door area of ​​a stainless steel rail transit vehicle body fixed to the rear inner side of a door frame and a bottom frame according to one or more embodiments of the present invention.

[0059] Fig.10 The present invention Fig. 9 Schematic diagram of the AA section.

[0060] Fig.11 The present invention Fig. 9 Schematic diagram of the EE cross section.

[0061] Fig.12 The present invention Fig.11 Enlarged schematic diagram of point D in the middle.

[0062] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0063] Among them: 1. wall panel, 2. connector, 3. door column, 4. sealing fastener, 5. bolt, 6. welding point, 7. sealant, 8. door crossbeam, 9. door corner reinforcement, 10. welding seam;

[0064] 11. Upper door angle, 12. Lower door angle, 13. Bottom frame;

[0065] 1-1. Arc-shaped protrusion; 3-1. Left door pillar, 3-2. Right door pillar, 3-3. First rounded transition section;

[0066] 11-1. The first side of the first surface, 11-2. The first end of the arcuate surface, 11-3. The arc transition section, 11-4. The arcuate surface, 11-5. The first surface, 11-6. The second side of the first surface, 11-7. The second end of the arcuate surface. DETAILED DESCRIPTION

[0067] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0068] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0069] As introduced in the background technology, there are problems in the prior art such as unreasonable door corner reinforcement structure at the door frame, difficulty in welding, and easy deformation of the wall panel during welding. In order to solve the above technical problems, the present invention proposes a door corner structure in the door area of ​​a stainless steel body of a rail transit.

[0070] Embodiment 1

[0071] In a typical embodiment of the present invention, reference is made to Figure 4 , Figure 5 and Fig. 9 As shown, a door corner structure of a door area of ​​a stainless steel rail transit vehicle body includes door corners respectively arranged at four corners of a door frame, the door corners can be welded to an outer wall panel 1, the door corner has a first surface 11-5 and an arcuate surface 11-4, the first surface is specifically a first plane, the hypotenuse side of the first surface 11-5 is connected to a longer side of the arcuate surface 11-4, the first surface is flush with the outer surface of the door column, the arcuate surface 11-4 is bent toward the center of the door frame, the first end 11-2 of the door corner arcuate surface and the first side 11-1 of the first surface are both welded to the door frame, the opposite side of the first end 11-2 of the door corner arcuate surface is the second end 11-7 of the door corner arcuate surface, the first side 11-1 of the first surface is vertically connected to the second side 11-6 of the first surface, and the second end of the door corner arcuate surface and the second side of the first surface are both welded to the door frame or the chassis.

[0072] Among them, it needs to be explained that the vehicle door frame includes two oppositely arranged door pillars 3, a door upper cross beam 8 is arranged on the top of the door pillars 3, and a base frame 13 is respectively arranged at the bottom of the door pillars on both sides. The base frame is located at the bottom of the door pillar, and the base frame is used to support the side wall. One end of the base frame is arranged beyond the door pillar.

[0073] In this embodiment, the oblique cross-section of the door corner (the cross-section direction intersects with the vertical plane where the door pillar is located) is L-shaped, the opposite side of the first surface of the door corner is hollow, and the interior of the door corner is also hollow, that is, the arcuate surface of the door corner is bent relative to the first surface, so that the door corner has only two surfaces, one is the arcuate surface, and the other is the first surface, so as to ensure the structural strength of the four corners of the door frame.

[0074] Specifically, the lengths of the first side and the second side of the first surface 11-5 may be the same or different. Considering the structure of the vehicle door frame, the first side and the second side of the first surface 11-5 are perpendicular to each other to form a right-angle side. The opposite side of the right-angle side in the first surface of the door corner is the hypotenuse side, and the hypotenuse side is an arc segment. In this way, the arc surface of the door corner is transitionally connected to the first surface through the arc transition segment 11-3, which facilitates the welding connection between the door corner and the wall panel.

[0075] It is easy to understand that the center of the door corner arc surface 11-4 is set towards the vertical center line of the vehicle door frame, and the width of the door corner arc surface is less than the thickness of the door pillar. Specifically, the width of the door corner arc surface can be less than or equal to half the thickness of the door pillar, and can be specifically 15-30mm. This not only effectively saves materials and ensures the accessibility of welding (that is, it can ensure that the arc welding gun can be inserted into the gap), but also effectively ensures the structural strength of the vehicle door frame under the premise of controlling material costs without setting an overly wide door corner arc surface.

[0076] In some examples, the length of the first side of the first surface 11-5 of the door corner may be 1 / 36-1 / 30 of the height of the door column, and the length of the second side of the first surface of the door corner may be 1 / 25-1 / 18 of the cross beam on the door. The second side of the door corner will not be too long to avoid affecting the passage of people at the vehicle door.

[0077] In this embodiment, the door corner curved surface 11-4 has a set thickness, the first end of the door corner curved surface is a bevel side, the second end of the door corner curved surface is also a bevel side, the angle between the first end of the door corner curved surface and the door cross beam or door column is an acute angle, and the angle between the second end of the door corner curved surface and the door column or base frame is an acute angle. In this way, a V-shaped welding joint is formed between the first end and the second end of the door corner curved surface and the door cross beam or door column or base frame to facilitate smooth welding; and when welding, the weld can fill the space between the door corner curved surface and the door cross beam, door column or base frame to ensure the quality of the weld.

[0078] It is easy to understand that, considering the different setting positions of the door corners, the door corners are distinguished, and the door corners include an upper door corner 11 and a lower door corner 12. The upper door corner 11 is fixed between the upper door beam 8 and the top side of the door pillar 3 in the vehicle door frame, and the lower door corner 12 is fixed between the bottom side of the door pillar 3 and the bottom frame 13. The upper door corners on both sides are relatively set, and the first upper door corner is set between the left door pillar 3-1 and the upper door beam 8, and the second upper door corner is set between the right door pillar 3-2 and the upper door beam 8. The lower door corners on both sides are relatively set, and the first lower door corner is set between the left door pillar 3-1 and the first bottom frame, and the second lower door corner is set between the right door pillar 3-2 and the second bottom frame.

[0079] In this embodiment, for the same vehicle model, the structure and size of each upper door corner are the same, and the structure and size of each lower door corner are the same, so as to facilitate processing, manufacturing and installation.

[0080] Considering that the upper crossbeam and the outer surface of the door column are not on the same plane, in order to ensure the welding connection between the upper door angle and the wall panel, refer to Figure 6 and Figure 7 As shown, the spacing distance between the first end of the upper door corner arc surface and the first side of the upper door corner first surface is set so that one side of the upper door corner can be clamped on the upper cross beam of the door, one end of the upper door corner arc transition section and the first end of the arc surface are on the same inclined plane, and the other end of the upper door corner arc transition section is set with a notch close to the door column, so that the side of the upper door corner arc transition section close to the door column and the second side of the first surface are set in the same plane.

[0081] In addition, the first end of the upper door angle arc surface is welded to the lower surface of the upper door beam, and the first side of the first surface of the upper door angle is welded to the outer surface of the upper door beam, that is, the upper door angle contacts the upper door beam through the L-shaped angle, and usually the length of the contact between the upper door angle and the lower surface of the upper door beam is greater than the length of the contact between the upper door angle and the outer surface of the upper door beam;

[0082] It should be noted that the lower surface of the door upper beam is arranged toward the upper surface of the base frame, the outer surface of the door upper beam faces the wall panel, and the lower surface of the door upper beam and the outer surface of the door upper beam are perpendicular to each other.

[0083] Specifically, when the upper door corner is set, the second end of the arcuate surface of the upper door corner is welded to the inner surface of the door column, and the second side of the first surface of the upper door corner is welded to the first rounded transition section of the door column. The first rounded transition section is located between the outer surface and the inner surface of the door column. This ensures that the first surface is flush with the outer surface of the door column, ensuring the fit and welding effect with the wall panel, and when the wall panel is subsequently welded, the weld formed between the wall panel and the door column is set along the height direction of the first rounded transition section.

[0084] The inner surface of the door column refers to the inner surface of the door columns on both sides that are arranged opposite to each other, and the outer surface of the door column refers to the surface that contacts the wall panel.

[0085] refer to Figure 8 As shown, the inner surface of the first end of the arcuate surface of the lower door corner is welded to the inner surface of the door column, and the first side of the first surface of the lower door corner is welded to the first rounded transition section of the door column, ensuring that the first surface of the lower door corner is flush with the outer surface of the door column;

[0086] The inner surface of the second end of the arc-shaped surface of the lower door corner is welded to the upper surface of the bottom frame, and the second side of the first surface of the lower door corner is welded to the second rounded transition section of the bottom frame, so as to ensure that the first surface of the lower door corner is flush with the outer surface of the bottom frame;

[0087] Taking into account that the second end of the curved surface of the lower door corner and the second side of the first surface need to be connected to the base frame, the inner surface of the second end of the curved surface of the lower door corner and the second side of the first surface of the lower door corner are arranged in the same plane; or, the distance between the inner surface of the second end of the curved surface of the lower door corner and the second side of the first surface of the lower door corner is smaller than the distance between the first end of the curved surface of the lower door corner and the first side of the first surface of the lower door corner, so that the first side of the first surface can contact the first rounded transition section 3-3 of the door column 3, and the second side of the first surface can contact the second rounded transition section of the base frame.

[0088] It is easy to understand that the arc transition section at the lower door corner is notched near the first side of the first surface and near the second side of the second plane.

[0089] The door angle structure provided in this embodiment is provided with door angles at the four corners of the vehicle door frame. The provision of the door angles effectively enhances the strength between the two upper corners of the vehicle door frame and the lower side of the vehicle door frame and the bottom frame, and the first surface of the door angle can be flush with the door column. Thus, the door angles can be provided at the four corners of the vehicle door frame first, and the door angles can be welded to the wall panel. Thus, at the four corners of the vehicle door frame, a unified force bearing system of the vehicle door frame, the door angle and the wall panel is formed, or a unified force bearing system of the door column, the bottom frame, the door angle and the wall panel is formed. This not only does not cause deformation of the wall panel, but also effectively enhances the structural strength of the vehicle door frame at the four corners, and ensures the reliability and sealing of the connection between the wall panel and the door angle.

[0090] In addition, in the present embodiment, the door corner is fixed first and then the wall panel is welded. After the door corner is fixed, the first surface is welded to the wall panel. In this way, a unified force-bearing system of the door frame, door corner and wall panel is formed at the four corners of the door frame, or a unified force-bearing system of the door column, base frame, door corner and wall panel is formed, which effectively enhances the structural strength of the door frame at the four corners. In this way, the door corner does not need to be too complicated, and its setting function can be guaranteed by a simple curved surface and the first surface.

[0091] Embodiment 2

[0092] This embodiment provides a stainless steel rail transit vehicle body. Fig.10 and Fig.11 As shown, it includes a wall panel and a door corner structure of a rail transit stainless steel car body door area described in Example 1. The wall panel is welded to the first surface of the door corner and the door column in sequence, so that the wall panel and the door column are connected by welding to ensure the sealing between the two.

[0093] The vehicle body provided in this embodiment achieves full sealing between the door pillars and the side walls through welding connection, without the need for sealants and sealing strips. The door corners are welded together with the wall panels located outside the door pillars, the door corners and the door pillars in sequence to achieve full sealing of the door area.

[0094] It is easy to understand that the wall panel 1 is provided with an arc-shaped protrusion 1-1 on the outer side of the door corner, the arc-shaped protrusion 1-1 is welded to the first surface of the door corner, and the shape of the arc-shaped protrusion is the same as that of the first surface.

[0095] Moreover, reference Fig.12 As shown, the arc-shaped protrusion is arranged beyond the door corner along the lateral direction of the stainless steel body to be connected with the door upper cross beam 8 or the base frame 13, and the arc-shaped protrusion is arranged lower than the arc surface of the door corner along the height reverse of the stainless steel body, specifically, lower than the arc transition section of the door corner, so that it is convenient to weld the protrusion of the wall panel to the first surface. Under the setting of the arc-shaped protrusion, even if the welds between the door corner and the door column, the door upper cross beam and the base frame are not beautiful enough, the arc-shaped protrusion covers part of the welds to ensure the welding effect at the wall panel.

[0096] Embodiment 3

[0097] This embodiment provides a method for sealing a door area of ​​a rail transit stainless steel vehicle body, using a rail transit stainless steel vehicle body as described in Embodiment 2, including the following contents:

[0098] Place the side wall unit of the stainless steel body connected with the door frame horizontally;

[0099] A door corner is provided at each of the four corners of the door frame;

[0100] The second end of each door corner arc surface is welded and connected to the door frame or the bottom frame by electric arc welding, and the second side of the first surface of the door corner is welded and connected to the door frame or the bottom frame;

[0101] The first side of the first surface of each door corner is welded to the door frame of the vehicle door by using arc welding, and the first end of the arc surface of the door corner is welded to the door frame of the vehicle door;

[0102] The wall panel is placed on the outside of the stainless steel body, and the wall panel is overlapped with the door column of the door frame, which means that the main part of the wall panel and the first rounded corner transition section 3-3 of the door column are spaced apart from each other at a distance close to the wall panel;

[0103] Use laser welding to weld the wall panel to the upper door corner, then weld the wall panel to the door column, and finally weld the wall panel to the lower door corner;

[0104] Laser welding is used to weld the wall panels and the base frame.

[0105] Specifically, the wall panel is overlapped with the first surface of the door corner and the outer surface of the door column, and the worker holds the existing laser welding gun to weld the required welding points, and performs handheld laser positioning welding at a spacing of 140-160mm;

[0106] Among them, the gap between the wall panel and the first surface of the door corner and the outer surface of the door column is less than or equal to 0.2mm.

[0107] It is easy to understand that after welding is completed, the oxidation color on the weld surface is cleaned by electrochemical method until the weld presents the original silver-white stainless steel color, and the sealing of the weld is checked by high-pressure air + soapy water.

[0108] The sealing method provided in this embodiment can ensure the structural strength of the door frame and avoid deformation of the wall panel. It is convenient for welding and can ultimately ensure the sealing of the connection between the door pillar, door corner and side wall, meeting the airtight and watertight requirements of high-speed and all-weather operation of rail vehicles. It is suitable for the full spectrum of stainless steel vehicle products and provides effective support and means for stainless steel vehicle bodies with high appearance quality and full-life sealing performance.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A door angle structure for a stainless steel vehicle door area of ​​a rail transit vehicle, characterized in that: It includes door corners respectively arranged at the four corners of the vehicle door frame, the door corners can be welded to the outer wall panel, the door corner has a first surface and a curved surface, the hypotenuse side of the first surface is connected to the longer side of the curved surface, the first surface is flush with the outer surface of the door pillar, the curved surface is bent toward the center of the vehicle door frame, the first end of the door corner curved surface and the first side of the first surface are both welded to the vehicle door frame, the opposite side of the first end of the door corner curved surface is the second end of the door corner curved surface, the first side of the first surface is vertically connected to the second side of the first surface, and the second end of the door corner curved surface and the second side of the first surface are both welded to the vehicle door frame or the chassis.

2. The door angle structure of the stainless steel vehicle door area of ​​rail transit according to claim 1, characterized in that: The oblique cross-section of the door corner is L-shaped, the opposite side of the first surface of the door corner is hollow, and the interior of the door corner is also hollow.

3. The door angle structure of the stainless steel vehicle door area of ​​rail transit according to claim 1, characterized in that: The door corners include an upper door corner and a lower door corner, wherein the upper door corner is fixed between an upper door cross beam and a top side of a door pillar in the vehicle door frame, and the lower door corner is fixed between a bottom side of a door pillar and the bottom frame.

4. The door angle structure of the stainless steel vehicle door area of ​​rail transit according to claim 3, characterized in that: The first end of the upper door corner arc surface and the first side of the upper door corner first surface are spaced apart at a distance such that one side of the upper door corner can be clamped on the door upper crossbeam.

5. The door angle structure of the stainless steel vehicle door area of ​​rail transit according to claim 3, characterized in that: The first end of the upper door angle arc surface is welded to the lower surface of the upper door beam, and the first side of the first surface of the upper door angle is welded to the outer surface of the upper door beam; The second end of the upper door corner arc surface is welded to the inner surface of the door column, and the second side of the upper door corner first surface is welded to the first rounded transition section of the door column, and the first rounded transition section is located between the outer surface and the inner surface of the door column.

6. The door angle structure of the door area of ​​the stainless steel vehicle body of rail transit according to claim 3, characterized in that: The inner surface of the first end of the lower door corner arc surface is welded to the inner surface of the door column, and the first side of the first surface of the lower door corner is welded to the first rounded transition section of the door column; The inner surface of the second end of the arcuate surface of the lower door corner is welded to the upper surface of the base frame, and the second side of the first surface of the lower door corner is welded to the second rounded transition section of the base frame.

7. The door angle structure of the stainless steel vehicle door area of ​​rail transit according to claim 1, characterized in that: The arc surface of the door corner is transitionally connected to the first surface via an arc transition section.

8. The door angle structure of the stainless steel vehicle door area of ​​rail transit according to claim 1, characterized in that: The hypotenuse side of the first face of the door angle is an arc segment; The width of the door corner arc surface is smaller than the thickness of the door column.

9. The door angle structure of the stainless steel vehicle door area of ​​rail transit according to claim 1, characterized in that: The door corner arc surface has a set thickness, the first end of the door corner arc surface is a sloped side, the second end of the door corner arc surface is also a sloped side, the angle between the first end or the second end of the door corner arc surface and the vehicle door frame is an acute angle, and the angle between the second end of the door corner arc surface and the vehicle door frame is an acute angle.

10. A stainless steel rail transit vehicle body, characterized in that: The invention comprises a door corner structure of a rail transit stainless steel vehicle body door area and a wall panel, wherein the wall panel is welded to the first surface of the door corner and the door column in sequence, so that the wall panel and the door column are welded to ensure the sealing between the two.

11. The rail transit stainless steel car body according to claim 10, characterized in that: The wall panel is provided with an arc-shaped protrusion on the outer side of the door corner, and the arc-shaped protrusion is welded to the first surface of the door corner; The arc-shaped protrusion is arranged beyond the door corner along the lateral direction of the stainless steel body, and the arc-shaped protrusion is arranged in the reverse direction of the height of the stainless steel body and lower than the arc-shaped surface of the door corner.

12. A method for sealing the door area of ​​a stainless steel rail transit vehicle body, characterized in that: A rail transit stainless steel car body according to any one of claims 10 or 11, comprising the following contents: Place the side wall unit of the stainless steel body connected with the door frame horizontally; A door corner is provided at each of the four corners of the door frame; The second end of each door corner arc surface is welded to the door frame or the bottom frame, and the second side of the first surface of the door corner is welded to the door frame or the bottom frame; The first side of the first surface of each door corner is welded to the door frame, and the first end of the arc-shaped surface of the door corner is welded to the door frame; Place the wall panel on the outside of the stainless steel body, and overlap the door pillars of the door frame; Use laser welding to weld the wall panel to the upper door corner, then weld the wall panel to the door column, and finally weld the wall panel to the lower door corner; Laser welding is used to weld the wall panels and the base frame.

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