Rail transit stainless steel car body door corner structure, car body and method

Abstract

The application discloses a door corner structure of a rail transit stainless steel car body door area, a car body and a method, solves the problem of unreasonable structure setting, difficulty in welding and easy deformation of a wallboard in a welding process of a door frame corner reinforcing part in the prior art, has the beneficial effects of enhancing the structural strength of the door area and not causing the deformation of the wallboard, and specifically has the following technical scheme: a door corner structure of a rail transit stainless steel car body door area, which comprises door corners arranged at four corners of a door frame, the door corners are welded and connected with wallboards on the outside, the door corner has a first face and an arc face, the oblique edge side of the first face is connected with the longer side of the arc face, the first face is flush with the outer surface of a door upright column, the first end of the arc face of the door corner, and the first side of the first face are welded and connected with the door frame, the opposite side of the first end of the arc face of the door corner is the second end of the arc face of the door corner, and the second end of the arc face of the door corner and the second side of the first face are welded and connected with the door frame or a chassis.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail transit, and in particular to a door corner structure of a rail transit stainless steel car body door area, a car body and a method. BACKGROUND

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

[0003] Rail transit car bodies are usually provided with multiple passenger compartment doors to facilitate passengers to quickly get on and off the vehicle. In addition, with the extension of the operation area and the gradual integration of metro and intercity vehicles for operation, the operation speed of the vehicle is gradually increased year by year, and the operation conditions involve underground and aboveground, which puts forward higher requirements for the air tightness, water tightness and all-weather sealing performance of the vehicle.

[0004] Rail transit car bodies are usually of a plate girder structure, as shown in Figure 1 and Figure 2 , the door column and the wall plate are usually sealed by spot welding + sealant 7, a plurality of welding points 6 are formed between the door column 3 and the wall plate 1, or a sealing fastener 4 + sealant strip is used, specifically, a connecting piece 2 is arranged on one side of the door column 3, the connecting piece is connected to the inner side of the wall plate by a bolt 5, and a sealing fastener is further arranged between the connecting piece and the wall plate. The above two sealing methods do not meet the sealing performance of the vehicle for 30 years of life cycle, and regular maintenance is required. In addition, the stainless steel car body in the rail vehicle industry is usually a non-coated surface, the deformation of the austenitic stainless steel material after welding connection is large, the deformation of the door corner area after arc welding connection is large, and the appearance effect is poor, which affects the appearance effect of the vehicle.

[0005] In summary, the inventors found that the existing rail transit car body cannot achieve the life cycle sealing of the passenger compartment steel structure door area, and the specific reasons are as follows:

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

[0007] The door corner reinforcement is separated from the wall plate, which further affects the structural strength of the door frame of the vehicle door;

[0008] The door corner reinforcement is welded after the wall plate is spot welded, and the high temperature generated in the welding process easily causes the wall plate to deform, which affects the appearance effect of the wall plate and the sealing effect of the area;

[0009] The current sealant and sealant strip are in the form of being easy to break;

[0010] The wallboard and the door column are in the form of a roll edge welding connector, and need to be welded upward in the existing working condition, which is difficult to operate and has large welding connection deformation;

[0011] The door corner reinforcing member is arranged beyond the wallboard, and the appearance of the arc seal welding seam of the cold work hardened austenitic stainless steel of the door corner reinforcing member does not meet the exposure requirement. SUMMARY

[0012] In view of the deficiencies in the prior art, a first object of the present application is to provide a door corner structure of a rail transit stainless steel car body door area, which can be stressed together with a wallboard, a door frame and a chassis, and effectively enhances the structural strength of the four corners of the door frame.

[0013] In order to achieve the above-mentioned purpose, the present application is realized by the following technical solutions:

[0014] A door corner structure of a rail transit stainless steel car body door area, comprising door corners arranged at four corners of a door frame, the door corners being welded and connected with the wallboards outside, the door corners having a first face and an arc face, the oblique edge side of the first face being connected with the longer side of the arc face, the first face being flush with the outer surface of a door column, the arc face being curved towards the center of the door frame, the first end of the arc face of the door corner and the first side of the first face being welded and connected with the door frame, the opposite side of the first end of the arc face of the door corner being the second end of the arc face of the door corner, the second side of the first face being perpendicularly connected with the first side of the first face, the second end of the arc face of the door corner and the second side of the first face being welded and connected with the door frame or the chassis.

[0015] The door corner structure as described above, by arranging the door corners at the four corners of the door frame, the arrangement of the door corners effectively enhances the strength of the upper two corners of the door frame and between the lower side of the door frame and the chassis, and the first face of the door corner can be flush with the door column, so that the door corners can be arranged at the four corners of the door frame first, and the door corners can be welded with the wallboards, so that at the four corners of the door frame, a unified stress system of the door frame, the door corner and the wallboard is formed, or a unified stress system of the door column, the chassis, the door corner and the wallboard is formed, which not only does not cause deformation of the wallboard, but also effectively enhances the structural strength of the door frame at the four corners, and ensures the reliability and sealing of the connection between the wallboard and the door corner.

[0016] The door corner structure as described above, the oblique cross section of the door corner is L-shaped, the opposite vertical side of the first face of the door corner is hollowly arranged, and the inside of the door corner is also hollowly arranged, that is, the arc face of the door corner is curvedly arranged relative to the first face, so as to ensure the structural strength of the four corners of the door frame.

[0017] The door corner structure of a door area of a rail transit stainless steel car body as described above, the door corner includes an upper door corner and a lower door corner, the upper door corner is fixed between a door upper beam and a door upright top side in a door frame of the car door, and the lower door corner is fixed between a door upright bottom side and a bottom frame.

[0018] The door corner structure of a door area of a rail transit stainless steel car body as described above, in consideration of the fact that the door upper beam and the outer surface of the door upright are not in the same plane, in order to ensure the welding connection between the upper door corner and the wall plate, a distance is provided between the first end of the arc surface of the upper door corner and the first side of the first surface of the upper door corner, so that one side of the upper door corner can be clamped to the door upper beam.

[0019] The door corner structure of a door area of a rail transit stainless steel car body as described above, the first end of the arc surface of the upper door corner is welded to the lower surface of the door upper beam, and the first side of the first surface of the upper door corner is welded to the outer surface of the door upper beam.

[0020] The second end of the arc surface of the upper door corner is welded to the inner surface of the door upright, and the second side of the first surface of the upper door corner is welded to the first fillet transition section of the door upright, which is located between the outer surface and the inner surface of the door upright, so as to ensure that the first surface is flush with the outer surface of the door upright, and to ensure the fit and welding effect with the wall plate.

[0021] The door corner structure of a door area of a rail transit stainless steel car body as described above, the first end of the arc surface of the lower door corner is welded to the inner surface of the door upright, and the first side of the first surface of the lower door corner is welded to the first fillet transition section of the door upright, so as to ensure that the first surface of the lower door corner is flush with the outer surface of the door upright.

[0022] The second end of the arc 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 fillet 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.

[0023] In consideration of the fact that the second end of the arc surface of the lower door corner and the second side of the first surface need to be connected to the bottom frame, the inner surface of the second end of the arc 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 arc 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 arc 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 a door area of a rail transit stainless steel car body as described above, in consideration of the appearance of the door corner and the convenience of the welding connection between the door corner and the wall plate, the arc surface and the first surface of the door corner are connected through a circular arc transition section.

[0025] The door corner structure of a door area of a rail transit stainless steel car body as described above, the oblique edge side of the first surface of the door corner is an arc section.

[0026] The width of the door corner arc surface is less than the thickness of the door upright, which effectively saves material and ensures the structural strength of the door frame of the vehicle door under the premise of controlling the material cost.

[0027] The door corner arc surface has a set thickness, the first end of the door corner arc surface is a bevel side, the second end of the door corner arc surface is also a bevel side, the angle between the first end of the door corner arc surface and the door upper beam or the door upright is an acute angle, and the angle between the second end of the door corner arc surface and the door upright or the chassis is an acute angle.

[0028] In the second aspect, the present application further provides a rail transit stainless steel vehicle body, which comprises a wall plate and the door corner structure of the rail transit stainless steel vehicle body door area, and the wall plate is sequentially welded and connected with the door corner first surface and the door upright, so that the wall plate and the door upright are connected by welding to ensure the sealing therebetween.

[0029] The vehicle body provided above achieves full sealing between the door upright and the side wall through welding connection, without the need to set sealing glue and sealing rubber strips, and the door corner enables the wall plate located outside the door upright to be sequentially welded and connected with the door corner and the door upright to achieve full sealing of the door area.

[0030] The wall plate of the rail transit stainless steel vehicle body provided above is provided with an arc-shaped protruding portion outside the door corner, and the arc-shaped protruding portion is welded and connected with the door corner first surface.

[0031] The arc-shaped protruding portion is arranged outside the door corner along the transverse direction of the stainless steel vehicle body, and the arc-shaped protruding portion is arranged lower than the door corner arc surface along the height of the stainless steel vehicle body.

[0032] In the third aspect, the present application further provides a sealing method for a door area of a rail transit stainless steel vehicle body, characterized in that the rail transit stainless steel vehicle body is used, and the method comprises the following steps:

[0033] The side wall unit of the stainless steel vehicle body connected with the door frame of the vehicle door is horizontally placed;

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

[0035] The second end of each door corner arc surface is welded and connected with the door frame of the vehicle door or the chassis, and the second side of the door corner first surface is welded and connected with the door frame of the vehicle door or the chassis;

[0036] The first side of each door corner first surface is welded and connected with the door frame of the vehicle door, and the first end of the door corner arc surface is welded and connected with the door frame of the vehicle door;

[0037] The wall plate is arranged outside the stainless steel vehicle body, and the wall plate is overlapped with the door upright of the door frame of the vehicle door.

[0038] The wall plate and the upper door corner are welded and connected by laser welding, then the wall plate and the door post are welded, and finally the wall plate and the lower door corner are welded and connected;

[0039] The wall plate and the bottom frame are welded and connected by laser welding.

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

[0041] 1) In the present application, door corners are arranged at the four corners of the door frame, which effectively enhances the strength of the upper two corners of the door frame and the bottom frame, and the first surface of the door corner is flush with the door post, so that the door corners can be arranged at the four corners of the door frame first, and the door corners can be welded with the wall plate, which not only does not cause deformation of the wall plate due to the arrangement of the door corners later, but also effectively ensures the reliability and sealing of the connection between the wall plate and the door corner.

[0042] 2) In the present application, the door corner structure is reasonable, the door corner has an arc surface and a first surface, the two ends of the arc surface are welded and connected with the door frame or the bottom frame, the two sides of the first surface are welded and connected with the door frame or the bottom frame, and the first surface can be welded and connected with the wall plate after the door corner is fixed. The door corner does not need to be too complex, and the simple arc surface and the first surface can ensure its setting effect; thus, at the four corners of the door frame, a unified stress system of the door frame, the door corner and the wall plate is formed, or a unified stress system of the door post, the bottom frame, the door corner and the wall plate is formed, effectively enhancing the structural strength of the door frame at the four corners.

[0043] 3) In the present application, the door corner structure is simple, only four sides of the door frame need to be welded, there are no too many sides, and it is not necessary 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 facilitates the welding of the door corner.

[0044] 4) In the present application, one side of the upper door corner is clamped with the upper door beam, and the second side of the first surface of the upper door corner is welded and connected with the first rounded transition section of the door post, which fully utilizes the structural feature that the upper door beam and the outer surface of the door post are not in the same plane, so as to ensure that the first surface of the upper door corner is flush with the outer surface of the door post, and the fitting and welding effect of the upper door corner and the wall plate is ensured.

[0045] 5) In the present application, the lower door corner structure is reasonable, the first side of the first surface of the lower door corner is welded and connected with the first rounded transition section of the door post, and the second side of the first surface is welded and connected with the second rounded transition section of the bottom frame, which facilitates processing and manufacturing, and ensures that the first surface is flush with the outer surfaces of the door post and the bottom frame.

[0046] 6) The stainless steel vehicle body provided in this invention allows for sequential welding of the wall panel, the first side of the door corner, and the door pillar. This welding connection integrates the wall panel, door pillar, and door corner into a single unit, eliminating the need for sealant or sealing strips between the wall panel and the end of the door pillar. This ensures the airtightness between the door pillar and the wall panel, guarantees reliable welding quality, effectively meets the airtightness requirements for the entire 30-year vehicle lifecycle, and controls the cost and time of regular maintenance.

[0047] 7) In this invention, the wall panel, door corner, and door post can be welded together in one go using laser welding. Welding can be performed while the side wall of the vehicle is horizontal, eliminating the need for overhead welding operations in the prior art. This makes the operation convenient and results in less welding deformation. The wall panel covers the door corner, preventing the weld seam from being exposed and avoiding the problem of large deformation in the welding connection of austenitic stainless steel materials in the prior art. Moreover, the laser welding method can achieve the door area structure design and manufacturing that meets the requirements of full-life sealing and excellent appearance.

[0048] 8) The sealing method provided by this 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 pillar, door corner and side wall, meet the airtight and watertight requirements of high-speed and all-weather operation of rail vehicles, and is applicable to the full range of stainless steel vehicle products. It provides an effective support and approach for stainless steel car bodies with high appearance quality and full life sealing performance. Attached Figure Description

[0049] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0050] Figure 1 A schematic diagram of a sealing fastener installed between the side wall and the door post in the prior art.

[0051] Figure 2 This is a schematic diagram of the connection between the side wall and the doorpost in the existing technology, which is achieved by electric welding and sealant.

[0052] Figure 3 This is a schematic diagram illustrating the welding required for door corner reinforcement components in existing technologies.

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

[0054] Figure 5 This is the present invention. Figure 4 A schematic diagram of the CC section.

[0055] Figure 6 This is the present invention. Figure 4A schematic diagram of the DD section.

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

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

[0058] Figure 9 This is a schematic diagram of the corner structure of a stainless steel rail transit car body door area fixed to the rear inner side of the door frame and the underframe, according to one or more embodiments of the present invention.

[0059] Figure 10 This is the present invention. Figure 9 A schematic diagram of section AA.

[0060] Figure 11 This is the present invention. Figure 9 A schematic diagram of the EE section.

[0061] Figure 12 This is the present invention. Figure 11 Enlarged diagram of point D in the middle.

[0062] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0063] The components include: 1. wall panel, 2. connector, 3. door post, 4. sealing fastener, 5. bolt, 6. weld point, 7. sealant, 8. door top beam, 9. door corner reinforcement, and 10. weld.

[0064] 11. Upper door corner; 12. Lower door corner; 13. Base frame;

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

[0066] 11-1. First side of the first face, 11-2. First end of the arc face, 11-3. Arc transition section, 11-4. Arc face, 11-5. First face, 11-6. Second side of the first face, 11-7. Second end of the arc face. Detailed Implementation

[0067] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0068] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0069] As introduced in the background, there are problems of unreasonable structure setting, not easy to weld, and easy to cause wallboard deformation in the welding process of the door corner reinforcing structure at the door frame in the prior art, in order to solve the above technical problems, the present application provides a door corner structure of a rail transit stainless steel car body door area.

[0070] Embodiment one

[0071] In a typical embodiment of the present application, referring to Figure 4 , Figure 5 and Figure 9 , a door corner structure of a rail transit stainless steel car body door area, including door corners respectively arranged at four corners of a door frame, the door corner can be welded and connected with an outer wall plate 1, the door corner has a first face 11-5 and an arc face 11-4, the first face is specifically a first plane, the oblique side of the first face 11-5 is connected with the longer side of the arc face 11-4, the first face is flush with the outer surface of a door upright, the arc face 11-4 is curved towards the center of the door frame, the first end 11-2 of the arc face of the door corner and the first side 11-1 of the first face are both welded and connected with the door frame, the opposite side of the first end 11-2 of the arc face of the door corner is the second end 11-7 of the arc face of the door corner, the first side 11-1 of the first face is perpendicularly connected with the second side 11-6 of the first face, and the second end of the arc face of the door corner and the second side of the first face are both welded and connected with the door frame or a chassis.

[0072] Among them, it needs to be explained that the door frame includes two pairs of vertically arranged door uprights 3, a door upper cross beam 8 is arranged at the top of the door upright 3, and a chassis 13 is arranged at the bottom of each side door upright, the chassis is located at the bottom of the door upright, and the chassis is used for supporting the side wall, and one end of the chassis exceeds the door upright.

[0073] In this embodiment, the oblique cross section (the cross section direction intersects with the vertical plane where the door upright is located) of the door corner is L-shaped, the opposite vertical side of the first face of the door corner is hollowly arranged, and the inside of the door corner is also hollowly arranged, that is, the arc face of the door corner is curved relative to the first face, so that the door corner has only two faces, one is the arc face, and the other is the first face, so as to ensure the structural strength of the four corners of the door frame.

[0074] Specifically, the length of the first side of the first surface 11-5 and the length of the second side of the first surface 11-5 can be the same or different, 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 door corner first surface is a hypotenuse side, and the hypotenuse side is an arc-shaped segment, so that the arc-shaped surface of the door corner and the first surface are connected through a circular arc transition segment 11-3, facilitating the welding connection of the door corner and the wall plate.

[0075] It is easy to understand that the center of the door corner arc-shaped surface 11-4 is arranged towards the vertical center line direction of the door frame, and the width of the door corner arc-shaped surface is less than the thickness of the door upright column, specifically, the width of the door corner arc-shaped surface can be less than or equal to half of the thickness of the door upright column, specifically, it can be 15-30mm, not only effectively saving materials and ensuring the accessibility of welding (that is, it can be ensured that the electric arc welding torch can be inserted into the gap), but also effectively ensuring the structural strength of the door frame without the need to set a too wide door corner arc-shaped surface under the premise of controlling the material cost.

[0076] In some examples, the length of the first side of the door corner first surface 11-5 can be 1 / 36-1 / 30 of the height of the door upright column, and the length of the second side of the door corner first surface can be 1 / 25-1 / 18 of the door upper cross beam, so that the second side of the door corner will not be too long to affect the passage of personnel at the door.

[0077] In the embodiment, the door corner arc-shaped surface 11-4 has a set thickness, the first end of the door corner arc-shaped surface is a bevel side, the second end of the door corner arc-shaped surface is also a bevel side, the angle between the first end of the door corner arc-shaped surface and the door upper cross beam or the door upright column is an acute angle, and the angle between the second end of the door corner arc-shaped surface and the door upright column or the chassis is an acute angle, so that a V-shaped welding interface is formed between the first end and the second end of the door corner arc-shaped surface and the door upper cross beam or the door upright column or the chassis, facilitating smooth welding; and during welding connection, the welding seam can fill the space between the door corner arc-shaped surface and the door upper cross beam, the door upright column or the chassis, thereby ensuring the quality of the welding seam.

[0078] It is easy to understand that the door corners are divided according to their different positions, and the door corners include upper door corners 11 and lower door corners 12, the upper door corners 11 are fixed between the door upper cross beam 8 and the top side of the door upright column 3, and the lower door corners 12 are fixed between the bottom side of the door upright column 3 and the chassis 13, the upper door corners on both sides are oppositely arranged, the first upper door corner is arranged between the left door upright column 3-1 and the door upper cross beam 8, and the second upper door corner is arranged between the right door upright column 3-2 and the door upper cross beam 8, the lower door corners on both sides are oppositely arranged, the first lower door corner is arranged between the left door upright column 3-1 and the first chassis, and the second lower door corner is arranged between the right door upright column 3-2 and the second chassis.

[0079] In the embodiment, the structure and size of each upper door corner are the same for the same vehicle type, and the structure and size of each lower door corner are the same, facilitating processing, manufacturing and installation.

[0080] In view of the fact that the upper door beam and the outer surface of the door post are not in the same plane, in order to ensure the welding connection of the upper door corner and the wallboard, as shown in Figure 6 and Figure 7 , the first end of the arc surface of the upper door corner is spaced apart from the first side of the first surface of the upper door corner to allow one side of the upper door corner to be clamped to the upper door beam, one end of the arc transition section of the upper door corner is on the same inclined surface as the first end of the arc surface, and the other end of the arc transition section of the upper door corner is provided with a missing corner close to one side of the door post, so that the side of the arc transition section of the upper door corner close to the door post is provided on the same plane as the second side of the first surface.

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

[0082] It should be noted that the lower surface of the upper door beam faces the upper surface of the chassis, the outer surface of the upper door beam faces the wallboard, and the lower surface of the upper door beam is perpendicular to the outer surface of the upper door beam.

[0083] Specifically, when the upper door corner is provided, the second end of the arc surface of the upper door corner is welded to the inner surface of the door post, and the second side of the first surface of the upper door corner is welded to the first round corner transition section of the door post, which is located between the outer surface and the inner surface of the door post. In this way, the first surface is flush with the outer surface of the door post, ensuring the fit and welding effect with the wallboard, and the weld formed between the wallboard and the door post is arranged along the height direction of the first round corner transition section during subsequent welding of the wallboard.

[0084] The inner surface of the door post refers to the inner surfaces of the two door posts arranged opposite to each other, and the outer surface of the door post refers to the surface in contact with the wallboard.

[0085] As shown in Figure 8 , the inner surface of the first end of the arc surface of the lower door corner is welded to the inner surface of the door post, and the first side of the first surface of the lower door corner is welded to the first round corner transition section of the door post, ensuring that the first surface of the lower door corner is flush with the outer surface of the door post.

[0086] The inner surface of the second end of the arc surface of the lower door corner is welded to the upper surface of the chassis, and the second side of the first surface of the lower door corner is welded to the second round corner transition section of the chassis, ensuring that the first surface of the lower door corner is flush with the outer surface of the chassis.

[0087] In view of the fact that the second end of the lower door corner arc surface needs to be connected with the first side of the bottom frame, the inner surface of the second end of the lower door corner arc surface is arranged in the same plane as the second side of the first surface of the lower door corner, or the distance between the inner surface of the second end of the lower door corner arc surface and the second side of the first surface of the lower door corner is less than the distance between the first end of the lower door corner arc surface and the first side of the first surface of the lower door corner, so that the first side of the first surface is in contact with the first circular corner transition section 3-3 of the door upright 3, and the second side of the first surface is in contact with the second circular corner transition section of the bottom frame.

[0088] It is easily understood that the lower door corner circular arc transition section is arranged without an angle near the first side of the first surface and near the second side of the second plane.

[0089] The door corner structure provided in the embodiment can effectively enhance the strength of the upper two corners of the door frame and the bottom frame, and the first surface of the door corner can be flush with the door upright, so that the door corner can be arranged at the four corners of the door frame first, and the door corner can be welded with the wall panel, so that a unified stress system of the door frame, the door corner and the wall panel is formed at the four corners of the door frame, or a unified stress system of the door upright, the bottom frame, the door corner and the wall panel is formed, which can not only avoid deformation of the wall panel, but also effectively enhance the structural strength of the door frame at the four corners and ensure the reliability and sealing of the connection between the wall panel and the door corner.

[0090] In addition, the door corner is fixed first and then the wall panel is welded in the embodiment, the first surface is welded and connected with the wall panel after the door corner is fixed, so that a unified stress system of the door frame, the door corner and the wall panel is formed at the four corners of the door frame, or a unified stress system of the door upright, the bottom frame, the door corner and the wall panel is formed, which can effectively enhance the structural strength of the door frame at the four corners, so that the door corner does not need to be too complex and can be ensured to have the setting effect by the simple arc surface and the first surface.

[0091] Embodiment two

[0092] The embodiment provides a rail transit stainless steel car body, referring to Figure 10 and Figure 11 As shown, the rail transit stainless steel car body door corner structure of the embodiment one, the wall panel is welded and connected with the first surface of the door corner and the door upright in sequence, so that the wall panel and the door upright are connected by welding to ensure the sealing between them.

[0093] The car body provided in the embodiment realizes full sealing between the door upright and the side wall by welding, without the need of sealing glue and sealing rubber strips, and the door corner is welded and connected with the wall panel and the door upright in sequence to realize full sealing of the door area.

[0094] It is easy to understand that the wallboard 1 is provided with an arc-shaped protruding part 1-1 outside the door corner, the arc-shaped protruding part 1-1 is welded and connected with the first surface of the door corner, and the shape of the arc-shaped protruding part is the same as that of the first surface.

[0095] Moreover, as shown in the figure, the arc-shaped protruding part is arranged outside the door corner along the transverse direction of the stainless steel vehicle body to be connected with the upper transverse beam 8 or the chassis 13, and the arc-shaped protruding part is arranged below the arc-shaped surface of the door corner along the height direction of the stainless steel vehicle body, specifically below the circular arc transition section of the door corner, so that the welding connection between the wallboard protruding part and the first surface is facilitated, and under the arrangement of the arc-shaped protruding part, even if the welding seams between the door corner and the door pillar, the upper transverse beam and the chassis are not beautiful enough, the arc-shaped protruding part can cover part of the welding seams, and the welding effect at the wallboard is ensured. Figure 12

[0096] Embodiment three

[0097] The embodiment provides a sealing method for a door area of a rail transit stainless steel vehicle body, adopts the rail transit stainless steel vehicle body in the embodiment two, and comprises the following contents.

[0098] The side wall unit connected with the door frame of the stainless steel vehicle body is horizontally placed;

[0099] One door corner is arranged at each of four corners of the door frame of the vehicle door;

[0100] The second end of the arc-shaped surface of each door corner is welded and connected with the door frame of the vehicle door or the chassis by adopting electric arc welding, and the second side of the first surface of the door corner is welded and connected with the door frame of the vehicle door or the chassis;

[0101] The first side of the first surface of each door corner is welded and connected with the door frame of the vehicle door by adopting electric arc welding, and the first end of the arc-shaped surface of the door corner is welded and connected with the door frame of the vehicle door;

[0102] The wallboard is placed outside the stainless steel vehicle body, the wallboard is overlapped with the door pillar of the door frame of the vehicle door, and the interval distance between the main part of the wallboard and the side of the first circular corner transition section 3-3 close to the wallboard is arranged.

[0103] The wallboard is welded and connected with the upper door corner by adopting laser welding, then the wallboard is welded with the door pillar, and finally the wallboard is welded and connected with the lower door corner;

[0104] The wallboard is welded and connected with the chassis by adopting laser welding.

[0105] Specifically, the wallboard is overlapped with the first surface of the door corner and the outer surface of the door pillar, a worker holds an existing laser welding gun to weld and connect the parts needing to be welded, and the laser positioning welding is performed at an interval of 140-160 mm;

[0106] The gap between the wallboard and the first surface of the door corner and the outer surface of the door pillar is less than or equal to 0.2 mm.​

[0107] It is easily understood that after the welding is completed, the surface oxidation color of the weld is cleaned by electrochemical method, so that the weld presents the original color of silver white stainless steel, and the sealing inspection of the weld is performed by high pressure air + soap water.

[0108] The sealing method provided by the embodiment can guarantee the structural strength of the door frame of the vehicle door, avoid the deformation of the wall plate, facilitate welding, finally guarantee the connection sealing performance of the door upright, the door corner and the side wall, meet the air tightness and water tightness requirements of the track vehicle in high speed and all-weather operation, be suitable for full spectrum stainless steel vehicle products, and provide effective support and way for the stainless steel car body with high appearance quality and full life sealing performance.

[0109] The above merely describes the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A door corner structure of a door area of a rail transit stainless steel car body, characterized in that, The door corner is provided with a first surface and an arc surface, the inclined side of the first surface is connected with the longer side of the arc surface, the first surface is flush with the outer surface of the door pillar, and the arc surface is curved toward the center of the door frame. The door corner includes an upper door corner fixed between the upper door beam and the top side of the door pillar in the door frame, and a first end of the arc surface of the upper door corner is spaced apart from a first side of the first surface of the upper door corner by a distance to allow one side of the upper door corner to be clamped to the upper door beam.

2. The door corner structure of a rail transit stainless steel car body door area according to claim 1, characterized in that, The inclined cross section of the door corner is L-shaped, and the opposite side of the first surface of the door corner is hollow.

3. The door corner structure of a rail transit stainless steel car body door area according to claim 1, characterized in that, The door corner also includes a lower door corner fixed between the bottom side of the door pillar and the chassis.

4. The door corner structure of a rail transit stainless steel car body door area according to claim 1, characterized in that, The second end of the arc surface of the upper door corner is welded to the inner surface of the door pillar, and the second side of the first surface of the upper door corner is welded to the first rounded transition section of the door pillar.

5. The door corner structure of a rail transit stainless steel car body door area according to claim 3, characterized in that, The inner surface of the first end of the arc surface of the lower door corner is welded to the inner surface of the door pillar, and the first side of the first surface of the lower door corner is welded to the first rounded transition section of the door pillar. The inner surface of the second end of the arc surface of the lower door corner is welded to the upper surface of the chassis, and the second side of the first surface of the lower door corner is welded to the second rounded transition section of the chassis.

6. The door corner structure of a rail transit stainless steel car body door area according to claim 1, characterized in that, The arc surface and the first surface of the door corner are connected by a rounded transition section.

7. The door corner structure of a rail transit stainless steel car body door area according to claim 1, characterized in that, The inclined side of the first surface of the door corner is an arc section. The width of the arc surface of the door corner is less than the thickness of the door pillar.

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

9. A rail transit stainless steel car body characterized by, The door corner structure of the door area of the rail transit stainless steel car body includes a wall plate and the door corner structure of any one of claims 1-8, the wall plate being sequentially welded to the first surface of the door corner and the door pillar to ensure the sealing between the wall plate and the door pillar through the welded connection.

10. The rail transit stainless steel car body of claim 9, wherein, The wall plate is provided with an arc protrusion outside the door corner, and the arc protrusion is welded to the first surface of the door corner. The arc protrusion is arranged beyond the door corner in the transverse direction of the stainless steel car body, and the arc protrusion is arranged below the arc surface of the door corner in the height direction of the stainless steel car body.

11. A sealing method for a door area of a rail transit stainless steel car body, characterized in that, The rail transit stainless steel car body of any one of claims 9 or 10 includes the following content: The side wall unit of the stainless steel car body connected with the door frame is placed horizontally; A door corner is arranged at each of the four corners of the door frame; The second end of the arc-shaped surface of each door corner is welded to the door frame or the chassis of the vehicle, and the second side of the first surface of each door corner is welded to the door frame or the chassis of the vehicle; The first side of the first surface of each door corner is welded to the door frame of the vehicle, and the first end of the arc-shaped surface of each door corner is welded to the door frame of the vehicle; The wall plate is arranged on the outer side of the stainless steel vehicle body, and the wall plate is overlapped with the door upright column of the door frame of the vehicle; The wall plate is welded to the upper door corner by laser welding, then the wall plate is welded to the door upright column, and finally the wall plate is welded to the lower door corner; The wall plate is welded to the chassis by laser welding.

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