Side door frame, side wall assembly and railway vehicle

Abstract

The invention relates to the technical field of railway vehicles, and provides a side door frame, a side wall assembly and a railway vehicle, the side door frame comprises a door upper cross beam, a lower doorsill, a connecting piece and a pair of door stand columns, the pair of door stand columns are parallel and distributed at intervals in the reference direction, and the door stand columns are fixedly connected with a side wall plate; the two ends of the door upper cross beam are correspondingly connected with the upper ends of the pair of door stand columns, and the door upper cross beam is fixedly connected with the side wall upper edge beam. The lower ends of the pair of door stand columns are fixedly connected with a lower doorsill, and the lower doorsill is fixedly connected with a side wall lower edge beam. The connecting pieces are arranged on the sides, away from each other, of the pair of door stand columns, and the connecting pieces are arranged at the upper end and the lower end of each door stand column and suitable for being fixedly connected with side wall stand columns. Therefore, the side door frame is of an independent and integral structure, is formed before the side wall assembly and the underframe assembly, is less affected by assembly errors and tolerance accumulation, can be independently adjusted and repaired, and can be beneficial to improving the structural size precision of a door area mounting interface.

Description

Technical Field

[0001] The invention relates to the technical field of rail vehicles and provides a side door frame, a side wall assembly and a rail vehicle. Background Art

[0002] The side wall door area of ​​a rail vehicle is a very important part of the vehicle body structure, which is used to provide an installation interface for the passenger compartment side door. In the related technology, when processing and forming the side wall door area, a notch is first reserved on the side wall panel, the door columns are welded and fixed to the left and right sides of the reserved notch, and the upper cross beam and lower door sill are welded and fixed to the upper side beam of the side wall and the side beam of the chassis respectively. The side door area structure is formed after the side wall and chassis are assembled. It is affected by manufacturing errors, assembly errors, tolerance accumulation, welding deformation and other reasons, which is not conducive to the control of the structural dimensions and tolerances of the door area installation interface.

[0003] Therefore, how to solve the problem in the related art that the side door area structure is not conducive to the control of the structural dimensions and tolerances of the door area installation interface has become an important technical problem to be solved by technical personnel in this field. Summary of the invention

[0004] The embodiments of the present invention provide a side door frame, a side wall assembly and a rail vehicle, so as to solve the defect in the related art that the side door area structure is not conducive to the control of the structural dimensions and tolerances of the door area installation interface, reduce the difficulty of controlling the structural dimensions and tolerances of the door area installation interface, and improve the dimensional accuracy of the door area installation interface.

[0005] The present invention provides a side door frame, comprising: A pair of door posts, parallel to each other and spaced apart along a reference direction, the door posts being adapted to be fixedly connected to the side wall panels; The door upper cross beam is arranged at the upper ends of the pair of door posts, the two ends of the door upper cross beam are correspondingly connected to the pair of door posts, and the door upper cross beam is suitable for being fixedly connected to the upper beam of the side wall; A lower threshold is parallel to the upper cross beam of the door, the lower threshold is arranged at the lower ends of a pair of door posts, the lower ends of the pair of door posts are fixedly connected to the lower threshold, and the lower threshold is suitable for being fixedly connected to the lower side beam of the side wall; The connecting piece is arranged on one side of a pair of the door posts which are away from each other. The upper and lower ends of each door post are provided with the connecting piece, and the connecting piece is suitable for being fixedly connected with the side wall post.

[0006] With such arrangement, a U-shaped door frame structure is formed by connecting the upper door beam, the lower door sill and a pair of door columns. The side door frame is an independent, integral structure, which is formed before the side wall and the chassis are assembled. It is less affected by assembly errors and tolerance accumulation and can be adjusted separately, which can be beneficial to improving the structural dimensional accuracy of the door area installation interface, and solves the problem in the related art that the side door area structure is not conducive to the control of the structural dimensions and tolerances of the door area installation interface.

[0007] Moreover, the side door frame provided by the present invention is an independent, integrated structure, and the door columns, upper door beams, lower door sills and connecting parts of the side door frame are all connected to the side walls, which can greatly improve the overall strength, rigidity and stability of the side wall assembly formed by connecting it with the side walls.

[0008] The connecting piece is used to connect the side door frame and the side wall. The connecting piece and the side door frame are pre-assembled and adjusted in advance, which can avoid the problem of deformation and difficulty in adjustment caused by welding the connecting piece after the side wall assembly is formed.

[0009] According to a side door frame provided by the present invention, the door upper cross beam is arranged between a pair of door upright posts, and the end surface of the door upper cross beam is fixedly connected to the door upright posts; The inner side of the side wall upper beam has a first through slot extending along the reference direction, the first through slot has an upper side wall and a lower side wall, and the door upper cross beam is embedded in the first through slot; The upper end of the door column is provided with an avoidance notch for avoiding the upper side wall and the lower side wall of the first through groove, so that the upper end of the door column can be inserted into the first through groove from the inner side of the upper side beam of the side wall.

[0010] With such arrangement, the upper cross beam of the door is embedded in the first through groove, and the arrangement of the upper cross beam of the side door frame does not affect the thickness of the side wall upper beam. The upper end of the door column can be inserted into the first through groove of the side wall upper beam until the door column and the inner side of the side wall panel abut against each other. The avoidance notch on the door column and the upper side wall and lower side wall of the side wall upper beam can position the door column and the side wall upper beam, and the door column and the side wall panel, which is conducive to improving the installation position accuracy of the side door frame on the side wall.

[0011] According to a side door frame provided by the present invention, the upper side of the door upper cross beam has a second through slot extending along the reference direction, a reinforcement seat is arranged in the second through slot, and the reinforcement seat is fixedly connected to each side wall of the second through slot.

[0012] Such arrangement and the arrangement of the reinforcing seat increase the rigidity and strength of the cross beam on the door, and improve the rigidity, strength and stability of the structure of the side door frame.

[0013] According to a side door frame provided by the present invention, at least two reinforcement seats are provided, and each reinforcement seat is spaced apart and distributed along the reference direction; And / or, the reinforcement seat includes a base plate, a first bending plate, a second bending plate and a third bending plate, the base plate is perpendicular to the reference direction, the first bending plate, the second bending plate and the third bending plate are all perpendicular to the base plate, and the first bending plate, the second bending plate and the third bending plate are suitable for being fixedly connected to the side walls of the second through groove.

[0014] By setting it in this way, increasing the number of reinforcing seats can increase the rigidity and strength of the door cross beam at various positions, and evenly improve the rigidity and strength of the door cross beam. The first bending plate, the second bending plate and the third bending plate of the reinforcing seat can improve the rigidity and strength of the reinforcing seat, and can increase the support for the door cross beam, further improving the rigidity and strength of the door cross beam.

[0015] According to a side door frame provided by the present invention, the length of the lower door sill along the reference direction is greater than the spacing between a pair of door columns along the reference direction, both ends of the lower door sill extend to a side away from the pair of door columns, and both ends of the lower door sill are suitable for supporting the side wall columns.

[0016] With such arrangement, the lower door sill is used to support the side wall columns, thereby improving the structural stability of the side wall.

[0017] According to a side door frame provided by the present invention, a slot with an open lower end is formed at the lower end of the door column, the lower door sill is embedded in the slot, and the shape of the slot matches the shape of the lower door sill.

[0018] Such an arrangement improves the matching degree between the lower end of the door column and the lower threshold, and the relative stability between the lower end of the door column and the lower threshold is relatively high. Moreover, the arrangement of the door column of the side door frame does not affect the thickness of the side wall. In addition, when the door column and the lower threshold are welded and fixed by welding technology, it is beneficial to improve the welding quality and the connection strength between the door column and the lower threshold.

[0019] A side door frame provided by the present invention further includes: A door corner reinforcement, wherein the upper door beam, the lower door sill and a pair of door posts form a U-shaped door frame structure, wherein the door corner reinforcement is arranged in the U-shaped door frame structure, and one door corner reinforcement is arranged at each corner of the U-shaped door frame structure, wherein the door corner reinforcement is fixedly connected to the door post, and further fixedly connected to one of the upper door beam and the lower door sill.

[0020] With such an arrangement, the door corner reinforcement can strengthen the door corner structure and improve the vehicle body strength in the stress concentration area.

[0021] According to a side door frame provided by the present invention, the door corner reinforcement is a stamped bent part, and the door corner reinforcement includes a curved panel and a pair of fourth bent plates, the pair of fourth bent plates are distributed along the inner and outer directions of the side wall, the fourth bent plates are fixedly connected to the U-shaped door frame structure, and the curved panel forms rounded corners at the corners of the U-shaped door frame structure.

[0022] In this way, the door corner reinforcement is a hollow structure, and when it is connected with the door column, the upper cross beam and the lower door sill, it only needs to be welded and fixed at the edge of the fourth bent plate. Compared with setting the door corner reinforcement as a solid block structure, the door corner reinforcement provided by the present invention is more conducive to ensuring welding quality.

[0023] The present invention also provides a side wall assembly, comprising the above-mentioned side door frame.

[0024] The present invention also provides a rail vehicle, comprising the above-mentioned side door frame, or comprising the above-mentioned side wall assembly.

[0025] The side door frame provided by the present invention comprises an upper door beam, a lower door sill, a connecting piece and a pair of door posts. The pair of door posts are parallel to each other and spaced apart along a reference direction, the upper door beam and the lower door sill are parallel to each other, the upper door beam is arranged at the upper end of the pair of door posts, and the lower door sill is arranged at the lower end of the pair of door posts. The two ends of the upper door beam are correspondingly connected to the pair of door posts, the lower ends of the pair of door posts are fixedly connected to the lower door sill, and the upper door beam, the lower door sill and the pair of door posts are enclosed to form a square door frame structure. A door area is reserved on the side wall, and the edge position of the door area is the side wall upper beam, the side wall lower beam and the side wall wallboard. The upper door beam of the side door frame provided by the present invention is used to be fixedly connected to the side wall upper beam, the lower door sill is used to be fixedly connected to the side wall lower beam, and the door post is used to be fixedly connected to the side wall wallboard. The connecting piece is arranged on the side of the pair of door posts away from each other, and each door post is provided with a connecting piece at both ends. The side wall panels are also provided with side wall columns, and the connecting pieces are used to be fixedly connected with the side wall columns. In this way, a U-shaped door frame structure is formed by connecting the upper door beam, the lower door sill and a pair of door columns. The side door frame is an independent, integral structure, which is formed before the side wall and the chassis are assembled. It is less affected by assembly errors and tolerance accumulation, and can be adjusted separately, which is conducive to improving the structural dimensional accuracy of the door area installation interface, and solves the problem in the related art that the side door area structure is not conducive to the control of the structural dimensions and tolerances of the door area installation interface.

[0026] Furthermore, in the side wall assembly provided by the present invention, since it is provided with the side door frame as described above, it also has the various advantages as described above.

[0027] Furthermore, in the rail vehicle provided by the present invention, since it is provided with the side door frame or the side wall assembly as described above, it also has the various advantages as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of the side door frame provided by the present invention at a certain viewing angle.

[0030] Figure 2 yes Figure 1 Enlarged view of S.

[0031] Figure 3 It is a schematic structural diagram of the side door frame provided by the present invention at another viewing angle.

[0032] Figure 4 It is a structural schematic diagram of a side door frame provided by the present invention when it is installed on a side wall.

[0033] Figure 5 yes Figure 4 Enlarged view of point P in the middle.

[0034] Figure 6 yes Figure 4 Enlarged view of the middle Q.

[0035] Figure 7 yes Figure 4 Enlarged view of R in the middle.

[0036] Figure 8 It is a schematic diagram of the cross-sectional shape of the upper beam of the side wall provided by the present invention.

[0037] Fig. 9 It is a structural schematic diagram of the door upper crossbeam and the reinforcing seat provided by the present invention.

[0038] Fig.10 It is a structural schematic diagram of the reinforcement seat provided by the present invention.

[0039] Fig.11 It is a structural schematic diagram of the door corner reinforcement provided by the present invention.

[0040] Fig.12 It is a schematic diagram of the slot structure at the lower end of the door column provided by the present invention.

[0041] Fig.13It is a schematic diagram of the relative positions of the lower side beam of the side wall and the lower door sill provided by the present invention.

[0042] Reference numerals: 1. Door pillar; 2. Side wall panel; 3. Door crossbeam; 4. Side wall upper beam; 5. Lower door sill; 6. Side wall lower beam; 7. Connector; 8. Side wall pillar; 9. First through groove; 10. Upper side wall; 11. Lower side wall; 12. Avoidance gap; 13. Second through groove; 14. Reinforcement seat; 15. Base plate; 16. First bending plate; 17. Second bending plate; 18. Third bending plate; 19. Slot; 20. Door corner reinforcement; 21. Arc panel; 22. Fourth bending plate. DETAILED DESCRIPTION

[0043] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0044] Combine the following Figures 1 to 13 The side door frame of the present invention is described.

[0045] like Figures 1 to 13 As shown, the side door frame provided by the embodiment of the present invention includes an upper door beam 3, a lower door sill 5, a connecting piece 7 and a pair of door columns 1.

[0046] Specifically, a pair of door posts 1 are parallel to each other and spaced apart along the reference direction. When the side door frame is installed on the side wall, the reference direction is consistent with the longitudinal direction of the side wall. Figure 4 and Figure 1 The direction indicated by m.

[0047] The upper door beam 3 and the lower door threshold 5 are parallel to each other, and the upper door beam 3 is arranged at the upper end of a pair of door posts 1, and the lower door threshold 5 is arranged at the lower end of a pair of door posts 1. Both ends of the upper door beam 3 are connected to the pair of door posts 1, and the lower ends of the pair of door posts 1 are fixedly connected to the lower door threshold 5. The upper door beam 3, the lower door threshold 5 and the pair of door posts 1 are surrounded to form a square-shaped door frame structure.

[0048] The side wall includes a side wall upper beam 4, a side wall lower beam 6, a side wall panel 2 and a side wall column 8. The side wall upper beam 4 and the side wall lower beam 6 are distributed up and down and extend along the reference direction. The side wall panel 2 is located between the side wall upper beam 4 and the side wall lower beam 6. A door area is reserved on the side wall. The edge positions of the door area are the side wall upper beam 4, the side wall lower beam 6 and the side wall panel 2. At positions outside the door area, the upper end of the side wall panel 2 is fixedly connected to the lower edge of the side wall upper beam 4, and the lower end of the side wall panel 2 is fixedly connected to the upper edge of the side wall lower beam 6. The side wall panel 2 is basically aligned with the outer side of the side wall upper beam 4 and the outer side of the side wall lower beam 6. The side wall column 8 is arranged on the inner side of the side wall panel 2, and the side wall column 8 is fixedly connected to the side wall upper beam 4 and the side wall lower beam 6.

[0049] The upper door beam 3 of the side door frame provided in the embodiment of the present invention is used to be fixedly connected to the upper side beam 4 of the side wall, the lower door sill 5 is used to be fixedly connected to the lower side beam 6 of the side wall, and the door column 1 is used to be fixedly connected to the side wall panel 2.

[0050] The connecting member 7 is arranged on the side of a pair of door columns 1 away from each other, and the upper and lower ends of each door column 1 are provided with a connecting member 7. The side wall panel 2 is also provided with a side wall column 8, and the connecting member 7 is used to be fixedly connected with the side wall column 8.

[0051] In this way, a U-shaped door frame structure is formed by connecting the upper door beam 3, the lower door sill 5 and a pair of door columns 1. The side door frame is an independent, integral structure, which is formed before the side wall and the chassis are assembled. It is less affected by assembly errors and tolerance accumulation and can be adjusted separately, which can be beneficial to improving the structural dimensional accuracy of the door area installation interface, and solves the problem in the related art that the side door area structure is not conducive to the control of the structural dimensions and tolerances of the door area installation interface.

[0052] Moreover, the side door frame provided in the embodiment of the present invention is an independent, integral structure, and the door column 1, the upper door beam 3, the lower door sill 5 and the connecting piece 7 of the side door frame are all connected to the side wall, which can greatly improve the overall strength, rigidity and stability of the side wall assembly formed by the connection with the side wall.

[0053] The connector 7 is used to connect the side door frame and the side wall. The connector 7 and the side door frame are pre-assembled and adjusted in advance, which can avoid the problem of deformation and difficulty in adjustment caused by welding the connector after the side wall assembly is formed.

[0054] In the embodiment of the present invention, the door upper cross beam 3 is arranged between a pair of door posts 1, and the end surface of the door upper cross beam 3 is fixedly connected to the door posts 1. A first through groove 9 is provided on the inner side of the side wall upper beam 4, and the first through groove 9 extends along the reference direction, and the opening of the first through groove 9 faces the inner side of the side wall.

[0055] Specifically, the side wall beam 4 is a stamped and bent part, and its cross-sectional shape is as follows: Figure 8 shown.

[0056] When the side door frame is assembled and connected with the side wall, the side door frame is located on the inner side of the side wall, the upper door beam 3 corresponds to the position of the first through groove 9, and the upper door beam 3 is embedded in the first through groove 9. The setting of the upper door beam 3 of the side door frame does not affect the thickness of the upper beam 4 of the side wall.

[0057] The end surface of the upper cross beam 3 of the door is connected to the door column 1. The upper cross beam 3 of the door corresponds to the first through groove 9, and the upper end of the door column 1 also corresponds to the first through groove 9. The first through groove 9 has an upper side wall 10 and a lower side wall 11. The upper end of the door column 1 is provided with an escape notch 12, which is used to escape the upper side wall 10 and the lower side wall 11 of the first through groove 9. In this way, the upper end of the door column 1 can be inserted into the first through groove 9 of the upper side beam 4 of the side wall until the door column 1 abuts against the inner side of the side wall panel 2.

[0058] It should be noted that a plurality of reinforcing plates are provided on the inner side of the side wall panel 2, and the plurality of reinforcing plates are spaced apart in the up-down direction, and each reinforcing plate is fixedly connected to the side wall panel 2. The reinforcing plate is a bent plate, and has a protrusion and a groove extending along the reference direction. A recessed portion and a raised portion are also provided on the side of the door column 1 close to the side wall panel 2, and the recessed portion is matched with the protrusion on the side wall panel 2, and the raised portion is matched with the groove on the side wall panel 2. In this way, when the door column 1 is against the side wall panel 2, each position of the door column 1 follows the shape of the side wall panel 2 and the reinforcing plate, and when the door column 1 is welded and fixed to the side wall panel 2 and the reinforcing plate by a welding process, it is beneficial to improve the welding quality and the connection strength between the door column 1 and the side wall panel 2.

[0059] Combining the raised groove on the above-mentioned reinforcing plate with the raised part and recessed part on the door column 1 and the avoidance notch 12 on the door column 1 with the upper side wall 10 and lower side wall 11 of the side wall upper side beam 4, the door column 1 and the side wall upper side beam 4 can be positioned, and the door column 1 and the side wall panel 2 can be positioned, which is beneficial to improve the installation position accuracy of the side door frame on the side wall.

[0060] In this embodiment, a second through slot 13 is provided on the upper side of the door upper cross beam 3, and the second through slot 13 extends along the reference direction. Fig. 9 The opening of the second through groove 13 is arranged upward, and the opening of the second through groove 13 corresponds to the upper side wall 10 of the first through groove 9 .

[0061] Specifically, the door upper cross beam 3 is a stamped and bent part.

[0062] After the door upper cross beam 3 is embedded in the first through groove 9 , the door upper cross beam 3 fills the first through groove 9 of the side wall upper beam 4 , and the side of the door upper cross beam 3 away from the plane where the side wall panel 2 is located is flush with the inner edge of the side wall upper beam 4 .

[0063] A plurality of weight-reducing holes are arranged on a side of the door upper cross beam 3 away from the side wall panel 2 , and the plurality of weight-reducing holes are distributed at intervals.

[0064] A reinforcing seat 14 is arranged in the second through slot 13, and the reinforcing seat 14 is fixedly connected to each side wall of the second through slot 13. The arrangement of the reinforcing seat 14 increases the rigidity and strength of the door upper cross beam 3, and improves the rigidity, strength and stability of the structure of the side door frame.

[0065] In some embodiments, at least two reinforcement seats 14 are provided, and the reinforcement seats 14 are spaced apart along the reference direction to increase the rigidity and strength of the door upper beam 3 at various positions, thereby uniformly improving the rigidity and strength of the door upper beam 3 .

[0066] In some embodiments, the reinforcement seat 14 includes a base plate 15, a first bending plate 16, a second bending plate 17, and a third bending plate 18. The base plate 15 is perpendicular to the reference direction, and the first bending plate 16, the second bending plate 17, and the third bending plate 18 are all perpendicular to the base plate 15, wherein the first bending plate 16 is located on a side of the base plate 15 close to the side wall panel 2, the second bending plate 17 is located at the lower end of the base plate 15, and the third bending plate 18 is located on a side of the base plate 15 away from the side wall panel 2. The first bending plate 16, the second bending plate 17, and the third bending plate 18 are used to be fixedly connected to each side wall of the second through groove 13, such as Fig. 9 and Fig.10 shown.

[0067] In addition to serving as connecting parts for connecting the upper door beam 3, the first bending plate 16, the second bending plate 17 and the third bending plate 18 can also increase support for the upper door beam 3, further improving the rigidity and strength of the upper door beam 3.

[0068] The first bending plate 16, the second bending plate 17, and the third bending plate 18 are all formed integrally with the base plate 15. Specifically, the reinforcing seat 14 is set as a stamping and bending part, and is formed by stamping and bending a steel plate using a stamping die. The position where the first bending plate 16 is connected to the base plate 15, the position where the second bending plate 17 is connected to the base plate 15, and the position where the third bending plate 18 is connected to the base plate 15 are all formed with bending ribs, which is beneficial to improving the rigidity of the reinforcing seat 14.

[0069] In the embodiment of the present invention, the lower threshold 5 is disposed below the door pillar 1, and the lower end of the door pillar 1 is connected to the upper surface of the lower threshold 5. The length of the lower threshold 5 along the reference direction is greater than the spacing between a pair of door pillars 1 along the reference direction, and both ends of the lower threshold 5 extend to the side away from the pair of door pillars 1.

[0070] A notch is reserved at the position of the side wall lower beam 6 corresponding to the door area. When the lower door sill 5 is fixed to the side wall lower beam 6, the lower door sill 5 fills the notch, and the two ends of the lower door sill 5 extend into the positions of the side wall lower beam 6 on both sides of the notch. Fig.13 The end of the lower door sill 5 overlaps with the lower side beam 6 of the side wall, and they support the side wall column 8 together.

[0071] The lower end of the side wall column 8 extends to above the lower door sill 5 , and the lower door sill 5 can support the side wall column 8 .

[0072] In the side door frame provided in this embodiment, the door column 1 is fixedly connected to the side wall column 8 by a connecting piece 7, and the lower door sill 5 is fixedly connected to the side wall column 8, which improves the connection strength between the side door frame and the side wall and is beneficial to improving the stability of the side wall assembly.

[0073] In this embodiment, a slot 19 is formed at the lower end of the door column 1, and the slot 19 is open downward. The lower threshold 5 is embedded in the slot 19, and the shape of the slot 19 matches the shape of the lower threshold 5, which improves the matching degree between the lower end of the door column 1 and the lower threshold 5, and the relative stability of the lower end of the door column 1 and the lower threshold 5 is relatively high. Moreover, the arrangement of the door column 1 of the side door frame does not affect the thickness of the side wall. In addition, when the door column 1 and the lower threshold 5 are welded and fixed by welding, it is beneficial to improve the welding quality and the connection strength between the door column 1 and the lower threshold 5.

[0074] Specifically, the door pillar 1 is formed by processing from a pipe.

[0075] In the embodiment of the present invention, the side door frame further includes a door corner reinforcement 20, which is arranged in the U-shaped door frame structure, and each corner of the U-shaped door frame structure is correspondingly provided with a door corner reinforcement 20. The door corner reinforcement 20 is fixedly connected to the door column 1, and the door corner reinforcement 20 is also fixedly connected to one of the upper door beam 3 and the lower door sill 5.

[0076] Specifically, for the corner formed by the door column 1 and the upper door beam 3, the door corner reinforcement 20 is fixedly connected to the door column 1 and the upper door beam 3 at the same time, which can improve the structural strength of the connection between the door column 1 and the upper door beam 3. For the corner formed by the door column 1 and the lower door sill 5, the door corner reinforcement 20 is fixedly connected to the door column 1 and the lower door sill 5 at the same time, which can improve the structural strength of the connection between the door column 1 and the lower door sill 5.

[0077] The door corner reinforcement piece 20 can strengthen the door corner structure and improve the strength of the side wall assembly in the stress concentration area.

[0078] In this embodiment, the door corner reinforcement 20 includes a curved panel 21 and a pair of fourth bent panels 22. The curved panel 21 forms a rounded corner at the corner of the U-shaped door frame structure. The pair of fourth bent panels 22 are distributed along the inner and outer directions of the side wall, and the fourth bent panels 22 are fixedly connected to the U-shaped door frame structure. The edge of the fourth bent panel 22 away from the curved panel 21 is two straight edges perpendicular to each other, so that one straight edge of the fourth bent panel 22 is fixedly connected to the door column 1, and one of the upper cross beam 3 and the lower door sill 5 is fixedly connected to the other straight edge of the fourth bent panel 22.

[0079] The door corner reinforcement 20 is a hollow structure, and when it is connected with the door column 1, the upper door beam 3 and the lower door sill 5, it is only necessary to weld and fix the edge of the fourth bent plate 22. Compared with setting the door corner reinforcement 20 as a solid block structure, the door corner reinforcement 20 provided in this embodiment is more conducive to ensuring welding quality.

[0080] The pair of fourth bent plates 22 are integrally formed with the curved panel 21. Specifically, the door corner reinforcement 20 is set as a stamping and bending part, and is formed by stamping and bending a steel plate using a stamping die. A bending rib is formed at the position where the fourth bent portion is connected to the curved panel 21, which is beneficial to improving the rigidity of the door corner reinforcement 20.

[0081] In some embodiments, the side wall columns 8 of the side wall are arranged in an inclined shape, referring to Figure 4 The connecting member 7 for connecting the door column 1 and the side wall column 8 needs to be designed according to the inclination of the side wall column 8 and the distance between the side wall column 8 and the door column 1 .

[0082] For the connection structure between the side wall column 8 and the upper end of the door column 1, refer to Figure 5 , the end face of the side wall column 8 is tilted relative to the extension direction of the side wall column 8, so that the end face of the side wall column 8 is in close contact with the side of the door column 1. For the connector 7 at this position, the main body of the connector 7 is welded and fixed to the door column 1, and at the same time, the main body of the connector 7 is connected to the side of the side wall column 8 away from the side wall panel 2. The connector 7 has a first extension part, which is tilted, and the inclination angle of the first extension part is consistent with the inclination angle of the side wall column 8, so that the first extension part is in close contact with the downwardly disposed surface of the side wall column 8. The connector 7 connects the side wall column 8 from different positions and different directions, so that the connection structure between the connector 7 and the side wall column 8 is more stable.

[0083] For the connection structure between the side wall column 8 and the lower end of the door column 1, refer to Figure 6 and Figure 7, the lower end of the side wall column 8 is directly connected to the lower door sill 5, and there is a gap between the lower end of the door column 1 and the lower end of the side wall column 8. At this time, the connecting member 7 is set as a connecting beam extending along the reference direction, and one end of the connecting beam is welded and fixed to the door column 1. A second extension portion is set at the other end of the connecting beam, and the inclination angle of the second extension portion is consistent with the inclination angle of the side wall column 8, so that the second extension portion is in contact with the upwardly disposed surface of the side wall column 8.

[0084] In this embodiment, the fixed connection between the various components of the side door frame is achieved by spot welding or segment welding.

[0085] On the other hand, an embodiment of the present invention further provides a side wall assembly, including the side door frame provided by any of the above embodiments. The side door frame provided by any of the above embodiments is a separate, integral structure, which is conducive to improving the structural dimensional accuracy of the door area installation interface. Therefore, the side wall assembly in this embodiment has the advantages of high structural dimensional accuracy and high strength and rigidity of the door area installation interface. The derivation process of the beneficial effects of the side wall assembly in the embodiment of the present invention is generally similar to the derivation process of the beneficial effects of the above-mentioned side door frame, so it will not be repeated here.

[0086] In another aspect, an embodiment of the present invention further provides a rail vehicle, comprising a side door frame or side wall assembly provided by any of the above embodiments, which has all the advantages of the above side door frame or side wall, and will not be described in detail here.

[0087] The derivation process of the beneficial effects of the rail vehicle in the embodiment of the present invention is generally similar to the derivation process of the beneficial effects of the above-mentioned side door frame or side wall assembly, so it will not be repeated here.

[0088] The rail vehicle provided in the embodiment of the present invention may be a high-speed train, a motor train, an urban train, etc.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A side door frame, characterized in that: include: A pair of door posts (1) parallel to each other and spaced apart along a reference direction, wherein the door posts (1) are suitable for being fixedly connected to the side wall panels (2); An upper door beam (3) is arranged at the upper ends of a pair of door uprights (1), the two ends of the upper door beam (3) are correspondingly connected to the pair of door uprights (1), and the upper door beam (3) is suitable for being fixedly connected to the upper beam (4) of the side wall; A lower threshold (5) is parallel to the upper cross beam (3) of the door, the lower threshold (5) is arranged at the lower ends of a pair of door uprights (1), the lower ends of the pair of door uprights (1) are both fixedly connected to the lower threshold (5), and the lower threshold (5) is suitable for being fixedly connected to the lower side beam (6) of the side wall; A connecting member (7) is arranged on a side of a pair of door columns (1) that are away from each other. The upper and lower ends of each door column (1) are provided with the connecting member (7). The connecting member (7) is suitable for being fixedly connected to a side wall column (8).

2. The side door frame according to claim 1, characterized in that: The door upper cross beam (3) is arranged between a pair of door upright posts (1), and the end surface of the door upper cross beam (3) is fixedly connected to the door upright posts (1); The inner side of the side wall upper beam (4) has a first through groove (9) extending along the reference direction, the first through groove (9) has an upper side wall (10) and a lower side wall (11), and the door upper cross beam (3) is embedded in the first through groove (9); The upper end of the door column (1) is provided with an escape notch (12) for escaping the upper side wall (10) and the lower side wall (11) of the first through groove (9), so that the upper end of the door column (1) can be inserted into the first through groove (9) from the inner side of the side wall upper beam (4).

3. The side door frame according to claim 2, characterized in that: The upper side of the door upper cross beam (3) has a second through slot (13) extending along the reference direction, a reinforcing seat (14) is arranged in the second through slot (13), and the reinforcing seat (14) is fixedly connected to each side wall of the second through slot (13).

4. The side door frame according to claim 3, characterized in that: At least two reinforcement seats (14) are provided, and the reinforcement seats (14) are distributed at intervals along the reference direction; And / or, the reinforcing seat (14) comprises a base plate (15), a first bending plate (16), a second bending plate (17) and a third bending plate (18), the base plate (15) is perpendicular to the reference direction, the first bending plate (16), the second bending plate (17) and the third bending plate (18) are all perpendicular to the base plate (15), and the first bending plate (16), the second bending plate (17) and the third bending plate (18) are suitable for being fixedly connected to each side wall of the second through groove (13).

5. The side door frame according to any one of claims 1 to 4, characterized in that: The length of the lower door sill (5) along the reference direction is greater than the spacing between the pair of door columns (1) along the reference direction, the two ends of the lower door sill (5) extend to a side away from the pair of door columns (1), and the two ends of the lower door sill (5) are suitable for supporting the side wall columns (8).

6. The side door frame according to claim 5, characterized in that: The lower end of the door column (1) is formed with a slot (19) with an open lower end, and the lower door sill (5) is embedded in the slot (19), and the shape of the slot (19) matches the shape of the lower door sill (5).

7. The side door frame according to any one of claims 1 to 4, characterized in that: Also includes: A door corner reinforcement piece (20), wherein the upper door beam (3), the lower door sill (5) and a pair of the door uprights (1) enclose a U-shaped door frame structure, the door corner reinforcement piece (20) is arranged in the U-shaped door frame structure, and one door corner reinforcement piece (20) is correspondingly arranged at each corner of the U-shaped door frame structure, the door corner reinforcement piece (20) is fixedly connected to the door uprights (1), and the door corner reinforcement piece (20) is also fixedly connected to one of the upper door beam (3) and the lower door sill (5).

8. The side door frame according to claim 7, characterized in that: The door corner reinforcement piece (20) is a stamped and bent piece, comprising a curved panel (21) and a pair of fourth bent plates (22), wherein the pair of fourth bent plates (22) are distributed along the inner and outer directions of the side wall, the fourth bent plates (22) are fixedly connected to the U-shaped door frame structure, and the curved panel (21) forms a rounded corner at the corner of the U-shaped door frame structure.

9. A side wall assembly, characterized in that: The invention comprises a side door frame as claimed in any one of claims 1 to 8.

10. A rail vehicle, characterized in that: It comprises the side door frame according to any one of claims 1 to 8, or it comprises the side wall assembly according to claim 9.

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