Traction box and chassis floor integrated structure

Abstract

The utility model discloses a traction box and chassis floor integrated structure. The traction box and chassis floor integrated structure comprises an end cross beam, a traction box, a chassis floor and a traction beam reinforcing structure, wherein one end of the traction box and one end of the underframe floor are welded to the same side face of the end cross beam, and the traction box is welded to the underframe floor; moreover, the traction beam reinforcing structure is fixed to the side, away from the end cross beam, of the chassis floor, and the traction beam reinforcing structure is welded to the end, away from the end cross beam, of the traction box in a butt joint mode. The end, far away from the end cross beam, in the traction box is welded to the traction beam reinforcing structure, so that geometric mutation positions of the traction box and the chassis floor are changed into base materials, the bearing capacity of the traction box and chassis floor integrated structure is greatly improved, a welding joint in a butt joint form can be adopted as far as possible, the structural strength is greatly improved, and the cost is reduced. The light weight effect is obvious, the process is simplified, and the welding workload is reduced.

Description

Technical Field

[0001] The present application relates to the field of rail vehicle traction structures, and in particular to an integrated structure of a traction box and an underframe floor. Background Art

[0002] As rail vehicle speeds continue to increase, aluminum alloy car bodies have become widely used. Due to the welding characteristics of aluminum alloy, the traction box structure has always been a key design challenge. Currently, traction box structures designed and used in China are mostly welded plate structures, with a large number of T-shaped welded joints. To meet strength requirements, complex reinforcement structures are often required. This leads to complex processes, heavy welding workloads, and difficulties in lightweighting the product. Summary of the Invention

[0003] The present application provides an integrated structure of a traction box and a chassis floor, which uses butt joints as much as possible to greatly improve the structural strength, achieve a significant lightweight effect, and simplify the process and reduce the welding workload.

[0004] A first aspect of the present application provides a traction box and chassis floor integrated structure, comprising:

[0005] End crossbeams, traction boxes, chassis floors and traction beam reinforcement structures;

[0006] Wherein, one end of the traction box and one end of the chassis floor are welded to the same side of the end crossbeam, and the traction box is welded to the chassis floor;

[0007] Moreover, the traction beam reinforcement structure is fixed to a side of the chassis floor away from the end cross beam, and the traction beam reinforcement structure is welded to an end of the traction box away from the end cross beam in the form of a butt joint.

[0008] In some embodiments, the traction beam reinforcement structure and the chassis floor are both profile structures;

[0009] The traction beam reinforcement structure and the chassis floor are integrally formed.

[0010] In some embodiments, the chassis floor comprises:

[0011] There are multiple sub-plates, which are arranged in sequence along the length direction of the end crossbeam, and adjacent sub-plates are welded;

[0012] The traction box and the traction beam reinforcement structure are respectively welded to the corresponding sub-plates. Moreover, there is a gap between the weld between the traction box and the corresponding sub-plate and the welds between adjacent sub-plates.

[0013] In some embodiments, the traction box includes: a buffer beam, a coupler plate, and a traction beam body;

[0014] The buffer beam and the traction beam body are respectively welded to both sides of the coupler plate, and the end of the buffer beam away from the coupler plate is welded to the end cross beam;

[0015] An end portion of the traction beam body away from the coupler plate is welded to the traction beam reinforcement structure.

[0016] In some embodiments, the coupler plate comprises:

[0017] a first plate, disposed at an end of the buffer beam away from the end crossbeam;

[0018] buffer beam welding interfaces, the number of which corresponds to the number of the buffer beams, and the buffer beam welding interfaces are arranged on the side of the first plate facing the buffer beam for welding to the buffer beam;

[0019] a second plate corresponding to each of the traction beam bodies, and the second plate is fixed to a side of the first plate facing the traction beam body, and an end of the second plate away from the first plate is welded to the corresponding traction beam body;

[0020] The third plate corresponds to the second plate one by one, and two ends of the third plate are respectively fixed to the first plate and the corresponding second plate, so that the first plate, the corresponding second plate and the third plate form a triangle arrangement.

[0021] In some embodiments, the first plate includes: a first split plate and a second split plate sequentially distributed along the length direction of the end beam, and the first split plate and the second split plate are symmetrically arranged;

[0022] The buffer beam welding interface, the second plate and the third plate are evenly distributed on the first sub-plate and the second sub-plate.

[0023] In some embodiments, the buffer beam includes: a first beam and a second beam;

[0024] The first beam and the second beam are welded to the buffer beam welding interfaces on the first and second split plates respectively, and the distance between the first beam and the second beam gradually increases from the coupler plate to the end cross beam.

[0025] In some embodiments, the traction beam body includes: a first traction beam and a second traction beam;

[0026] The first pull beam and the second pull beam are both welded between the traction beam reinforcement structure and the corresponding second split plate, and the distance between the first pull beam and the second pull beam gradually decreases from the coupler plate to the traction beam reinforcement structure.

[0027] In some embodiments, further comprising:

[0028] A lower cover plate is welded to the end surface of the buffer beam, the coupler plate and the traction beam body that is away from the chassis floor;

[0029] Moreover, in a direction perpendicular to the chassis floor, a height from the coupler plate to the buffer beam gradually decreases, and a height from the coupler plate to the traction beam reinforcement structure gradually decreases.

[0030] In some embodiments, one or more of the weld interface between the end cross beam and the chassis floor and the buffer beam weld interface is a weld interface in the form of a butt joint;

[0031] One or more of the end cross beam, the buffer beam, and the first plate of the coupler plate are profile structures.

[0032] Compared with the prior art, the advantage of the present application is that by fixing the traction beam reinforcement structure to the chassis floor, the chassis floor is integrated with the traction beam reinforcement structure, and the end of the traction box away from the end cross beam is welded to the traction beam reinforcement structure, so that the geometric mutation position of the traction box and the chassis floor becomes the parent material, which greatly improves the bearing capacity of the integrated structure of the traction box and the chassis floor. In addition, the end of the chassis floor away from the traction beam reinforcement structure is welded to the end cross beam in the form of a butt joint, so that the welding joint in the form of a butt joint can be used as much as possible, which greatly improves the structural strength and has a significant lightweight effect. Moreover, the process is simplified and the welding workload is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the integrated structure of the traction box and the chassis floor;

[0034] Figure 2 It is a schematic diagram of the traction box structure;

[0035] Figure 3 It is a schematic diagram of the chassis floor structure;

[0036] Figure 4 1 is a schematic diagram of the coupler plate structure (I);

[0037] Figure 5 It is a schematic diagram of the end beam structure;

[0038] Figure 6 It is a schematic diagram of the cross-section structure of the end beam;

[0039] Figure 7 2. Schematic diagram of the coupler plate structure (II).

[0040] In the figure, 1, traction box; 101, buffer beam; 1011, first beam; 1012, second beam; 102, traction beam body; 1021, first traction beam; 1022, second traction beam; 103, coupler plate; 1031, first plate; 10311, first split plate; 10312, second split plate; 1032, second plate; 10321, first panel; 10322, second panel; 1033, third plate; 10331, third panel; 10332, third panel. Four panels; 1034, buffer beam welding interface; 1035, coupler traction welding interface; 10303, coupler mounting bolt hole; 10304, operation hole; 104, lower cover plate; 2, chassis floor; 20, sub-plate; 200, right sub-plate; 201, middle sub-plate; 202, left sub-plate; 203, traction beam reinforcement structure; 2031, reinforcement component; 2032, stiffener component; 3, end crossbeam; 301, arc area interface; 302, floor welding interface. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solutions of the present application, and to fully understand and implement how the present application applies technical means to solve technical problems and achieve the corresponding technical effects, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. The embodiments of the present application and the various features in the embodiments can be combined with each other without conflict, and the technical solutions formed are all within the scope of protection of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present application.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0043] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0044] Example 1

[0045] Figure 1 It is a schematic diagram of the overall structure of the integrated structure of the traction box and the chassis floor; Figure 2 1 is a structural diagram of the traction box 1; Figure 3 2 is a schematic diagram of the structure of the chassis floor; Figure 4 1 is a schematic structural diagram of the coupler plate 103 (I); Figure 5 It is a schematic diagram of the structure of the end beam 3; Figure 6 Schematic diagram of the cross-sectional structure of the end beam 3; Figure 7 1 is a structural diagram of the coupler plate 103 (II).

[0046] according to Figure 1-6 As shown, this embodiment provides an integrated structure of a traction box and a chassis floor, which includes: an end crossbeam 3, a traction box 1, a chassis floor 2, and a traction beam reinforcement structure 203;

[0047] One end of the traction box 1 and one end of the chassis floor 2 are welded to the same side of the end crossbeam 3;

[0048] Moreover, the traction beam reinforcement structure 203 is fixed to a side of the chassis floor 2 away from the end cross beam 3 , and the traction beam reinforcement structure 203 is welded to the end of the traction box 1 away from the end cross beam 3 in the form of a butt joint.

[0049] Specifically, the end of the chassis floor 2 away from the end crossbeam 3 is fixed to the traction beam reinforcement structure 203, and the two ends of the traction box 1 are respectively welded to the end crossbeam 3 and the traction beam reinforcement structure 203 fixed to the chassis floor 2. The traction box 1 is welded to the end crossbeam 3 in the form of a butt joint, and the end of the chassis floor 2 away from the traction beam reinforcement structure 203 is also welded to the end crossbeam 3 in the form of a butt joint. One end of the traction box 1 and one end of the chassis floor 2 are both welded to the same side of the end crossbeam 3. In another option, the traction box 1 is also welded to the chassis floor 2.

[0050] Therefore, in this embodiment, the traction beam reinforcement structure 203 is fixed to the chassis floor 2, so that the chassis floor 2 is integrated with the traction beam reinforcement structure 203, and the end of the traction box 1 away from the end cross beam 3 is welded to the traction beam reinforcement structure 203, so that the geometric mutation position of the traction box 1 and the chassis floor 2 becomes the parent material, which greatly improves the bearing capacity of the integrated structure of the traction box 1 and the chassis floor 2. In addition, the traction box 1 is welded to the end cross beam 3 in the form of a butt joint, and the end of the chassis floor 2 away from the traction beam reinforcement structure 203 is also welded to the end cross beam 3 in the form of a butt joint, so that welding joints in the form of butt joints can be used as much as possible, which greatly improves the structural strength and has a significant lightweight effect. Moreover, the process is simplified and the welding workload is reduced.

[0051] Regarding the connection relationship between the traction beam reinforcement structure 203 and the chassis floor 2, in this embodiment, it can be further optimized as follows: the traction beam reinforcement structure 203 and the chassis floor 2 are both profile structures, and the traction beam reinforcement structure 203 and the chassis floor 2 are integrally formed to constitute a parent material structure for the chassis floor 2 profile processing. Therefore, compared with welding the traction beam reinforcement structure 203 to the chassis floor 2, the traction beam reinforcement structure 203 is integrally formed on the chassis floor 2 to constitute a parent material structure for the chassis floor 2 profile processing, thereby avoiding problems such as reduced material mechanical properties due to welding.

[0052] In addition, for the above-mentioned end cross beam 3, the end cross beam 3 can be preferably set as a profile structure, and the end cross beam 3 integrates a floor welding interface 302 welded to the chassis floor 2. Further preferably, the welding interface between the end cross beam 3 and the chassis floor 2 (i.e., the floor welding interface 302) is a butt joint type welding interface. Compared with T-type welding joints, the fatigue resistance of the structure can be improved by adopting more butt joint type welding joints; the middle part of the end cross beam 3 is machined into an arc area interface 301.

[0053] Example 2

[0054] according to Figure 1 and Figure 3 As shown, based on the above embodiment 1, the following settings are made for the chassis floor 2 in this embodiment, namely:

[0055] The chassis floor 2 includes a plurality of sub-panels 20 arranged in sequence along the length of the end crossbeam 3. Adjacent sub-panels 20 are welded to each other. The welding method between the sub-panels 20 is not limited in this embodiment and can be any common welding method, such as fusion welding, pressure welding, friction stir welding, arc welding, and friction welding. One option is to weld adjacent sub-panels 20 in a T-joint or butt-joint manner.

[0056] In addition, the traction beam reinforcement structure 203 and the traction box 1 are welded to the corresponding sub-plates 20. It is worth noting that there is a gap between the weld between the traction box 1 and the sub-plate 20 and the weld between adjacent sub-plates 20. In other words, the weld between adjacent sub-plates 20 of the chassis floor 2 should avoid the group weld between the traction box 1 and the chassis floor 2 (the corresponding sub-plates 20) to avoid stress concentration areas and improve structural strength.

[0057] It is further preferred that the chassis floor 2 is welded from an odd number of sub-plates 20, and the sub-plates 20 are profile structures, and adjacent sub-plates 20 use the same profile cross-section. Moreover, the chassis floor 2 is arranged to be symmetrical relative to the sub-plate 20 located in the middle, and the welds between adjacent sub-plates 20 should avoid the welds between the traction box 1 and the corresponding sub-plates 20. The sub-plate 20 located in the middle is integrally formed with a traction beam reinforcement structure 203.

[0058] Such as: according to Figure 1 and Figure 3 As shown, the chassis floor 2 includes three sub-plates 20 (left sub-plate 202, middle sub-plate 201, and right sub-plate 200) welded in sequence, and the middle sub-plate 201 integrated traction beam reinforcement structure 203 is machined from profiles.

[0059] In addition, in any embodiment related to the integrated structure of the traction box 1 and the chassis floor 2, the traction beam reinforcement structure 203 is a profile structure, and the traction beam reinforcement structure 203 includes a reinforcement component 2031 and a reinforcement rib component 2032. The reinforcement component 2031 and the reinforcement rib component 2032 are both integrally formed. The reinforcement component 2031 and the reinforcement rib component 2032 are both integrally formed on the chassis floor 2. Of course, the reinforcement component 2031 and the reinforcement rib component 2032 are preferably configured to be integrally formed on the middle sub-plate 20 (neutron plate 201). The traction box 1 and the reinforcement rib component 2032 are respectively located at both ends of the reinforcement component 2031, and the traction box 1 is welded to the end of the reinforcement component 2031.

[0060] Example 3

[0061] according to Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, based on any of the above embodiments, in this embodiment, the following settings are made for the traction box 1, namely:

[0062] The traction box 1 includes a buffer beam 101, a coupler plate 103 and a traction beam body 102;

[0063] The coupler plate 103 is a coupler mounting plate used to mount the coupler. The buffer beam 101 and the traction beam body 102 are welded to both sides of the coupler plate 103, and the end of the buffer beam 101 away from the coupler plate 103 is welded to the end crossbeam 3.

[0064] An end portion of the traction beam body 102 away from the coupler plate 103 is welded to the traction beam reinforcement structure 203 .

[0065] Therefore, the end cross beam 3 is welded to the end of the buffer beam 101 away from the coupler plate 103. Preferably, the end cross beam 3 is welded to the end of the buffer beam 101 away from the coupler plate 103 in the form of a T-joint.

[0066] In addition, for the coupler plate 103, a first structural optimization is performed in this embodiment:

[0067] The coupler plate 103 is preferably: the coupler plate 103 is an integral extruded profile, the coupler plate 103 includes: a first plate 1031, a second plate 1032, a third plate 1033, and a buffer beam welding interface 1034, wherein the first plate 1031 is arranged at the end of the buffer beam 101 away from the end crossbeam 3; the second plate 1032 corresponds to the traction beam body 102 one by one, and the second plate 1032 is fixed to the side of the first plate 1031 facing the traction beam body 102, and the end of the second plate 1032 away from the first plate 1031 is welded to the corresponding traction beam body 102. Beam body 102; the third plate 1033 corresponds to the second plate 1032 one by one, and the two ends of the third plate 1033 are respectively fixed to the first plate 1031 and the corresponding second plate 1032, so that the first plate 1031, the corresponding second plate 1032 and the third plate 1033 form a triangular arrangement, thereby, the third plate 1033 can be used as a reinforcing rib plate of the coupler plate 103, and the connection between the second plate 1032 and the traction beam body 102 adopts an integrally formed third plate 1033 for transition, and the buffer beam 101 is welded to the corresponding position of the third plate 1033, so that the structural force transmission is more coordinated.

[0068] Preferably, the first plate 1031 , the second plate 1032 , the third plate 1033 , and the buffer beam welding interface 1034 are integrally formed. Further, the first plate 1031 , the second plate 1032 , the third plate 1033 , and the buffer beam welding interface 1034 are integrally extruded profiles.

[0069] Moreover, the first plate 1031, the corresponding second plate 1032 and the third plate 1033 form a triangular stable transition structure, which not only avoids the degradation of the parent material performance caused by the welded reinforcement structure (the traction beam reinforcement structure 203 is integrally formed in the middle sub-plate 20 of the chassis floor 2), but also the thickness variation of the profile-formed reinforcement rib plate (the third plate 1033) is more flexible than that of plate welding, and the structure can be designed as a more optimal solution according to the strength requirements.

[0070] Furthermore, the number of the buffer beam welding interfaces 1034 corresponds one-to-one with the number of the buffer beam 101. Furthermore, the buffer beam welding interfaces 1034 are disposed on the side of the first plate 1031 facing the buffer beam 101 for welding to the buffer beam 101. Preferably, the buffer beam welding interfaces 1034 are butt-jointed welded interfaces. Compared to T-joints, the use of more butt-jointed welded interfaces can improve the structural fatigue resistance between the buffer beam 101 and the first plate 1031, thereby improving the structural fatigue resistance between the buffer beam 101 and the coupler plate 103.

[0071] The welding interface between the second plate 1032 and the traction beam body 102 is a coupler traction welding interface 1035; the coupler traction welding interface 1035 can also be set as an interface welded in the form of a butt joint. Compared with T-type welding joints, by adopting more welding joints in the form of butt joints, the structural fatigue resistance between the traction beam body 102 and the second plate 1032 can be improved, thereby improving the structural fatigue resistance between the traction beam body 102 and the coupler plate 103.

[0072] Of course, in this embodiment, the following settings can also be made: the first plate 1031 is a profile structure, the second plate 1032 and the third plate 1033 are plate structures, the traction beam body 102 is a plate structure, the buffer beam 101 and the first plate 1031 are butt-welded through the buffer beam welding interface 1034, and the second plate 1032 and the traction beam body 102 are welded through the coupler traction welding interface 1035.

[0073] In addition, coupler mounting bolt holes 10303 and operating holes 10304 are machined in the solid area of the coupler plate 103 profile for assembling coupler bolts.

[0074] Among them, the coupler mounting bolt hole 10303 is opened on the first plate 1031. Preferably, the coupler mounting bolt hole 10303 is opened in the triangular area covered by the first plate 1031, the second plate 1032 and the third plate 1033, and the operation hole 10304 is opened on the third plate 1033.

[0075] In addition, based on the above-mentioned first structural optimization of the coupler plate 103, the following second structural optimization can also be performed on the coupler plate 103:

[0076] The first plate 1031 includes: a first sub-plate 10311 and a second sub-plate 10312 distributed in sequence along the length direction of the end crossbeam 3, and the first sub-plate 10311 and the second sub-plate 10312 are symmetrically arranged; the buffer beam welding interface 1034, the second plate 1032 and the third plate 1033 are evenly distributed on the first sub-plate 10311 and the second sub-plate 10312.

[0077] Preferably, the coupler plate 103 is formed by splicing and welding a first sub-plate 10311 and a second sub-plate 10312 .

[0078] Specifically, the first sub-plate 10311, and the second plate 1032 and the third plate 1033 distributed on the first sub-plate 10311 are a profile structure, that is, a first profile structure; the second sub-plate 10312, and the second plate 1032 and the third plate 1033 distributed on the second sub-plate 10312 are a profile structure; further, the first sub-plate 10311, and the second plate 1032, the third plate 1033 distributed on the first sub-plate 10311 and the buffer beam welding interface 1034 are a profile structure, that is, : First profile structure; the second sub-plate 10312, and the second plate 1032, the third plate 1033 and the buffer beam welding interface 1034 distributed on the second sub-plate 10312 are a profile structure; that is: the second profile structure; the first profile structure and the second profile structure are formed by welding the weld between the first sub-plate 10311 and the second sub-plate 10312 to form the coupler plate 103, and the welding method between the first profile structure and the second profile structure includes but is not limited to one or more of the following: arc welding, friction welding, and stir friction welding.

[0079] Preferably, both the first and second profile structures are integrally extruded. Furthermore, the first sub-plate 10311, the corresponding second plate 1032, and the third plate 1033 form a triangular, stable transition structure. The second sub-plate 10312, the corresponding second plate 1032, and the third plate 1033 also form a triangular, stable transition structure. This avoids the degradation of the parent material's performance caused by welded reinforcement structures (the traction beam reinforcement structure 203 is integrally formed with the central sub-plate 20 of the chassis floor 2). Furthermore, the profile-formed reinforcement ribs (third plate 1033) offer greater flexibility in thickness variation compared to plate welding, allowing for optimal structural design based on strength requirements.

[0080] Furthermore, the number of the buffer beam welding interfaces 1034 corresponds one-to-one with the buffer beam 101. Furthermore, the buffer beam welding interfaces 1034 are disposed on the side of the corresponding first sub-plate 10311 and second sub-plate 10312 facing the buffer beam 101 for welding to the corresponding buffer beam 101. Preferably, the buffer beam welding interfaces 1034 are butt-jointed welded interfaces. Compared to T-joints, the use of more butt-jointed welded interfaces can improve the structural fatigue resistance between the corresponding buffer beam 101 and the first sub-plate 10311, and between the corresponding buffer beam 101 and the second sub-plate 10312, thereby improving the structural fatigue resistance between the buffer beam 101 and the coupler plate 103.

[0081] The welding interface between the second plate 1032 and the traction beam body 102 is a coupler traction welding interface 1035; the coupler traction welding interface 1035 can also be set as an interface welded in the form of a butt joint. Compared with T-type welding joints, by adopting more welding joints in the form of butt joints, the structural fatigue resistance between the traction beam body 102 and the second plate 1032 can be improved, thereby improving the structural fatigue resistance between the traction beam body 102 and the coupler plate 103.

[0082] Of course, in this embodiment, the following settings can also be made: the first sub-plate 10311 and the second sub-plate 10312 are both profile structures, the second plate 1032 and the third plate 1033 are plate structures, the traction beam body 102 is a plate structure, the buffer beam 101 and the corresponding first sub-plate 10311 are welded in the form of a butt joint through the corresponding buffer beam welding interface 1034, the buffer beam 101 and the corresponding second sub-plate 10312 are welded in the form of a butt joint through the corresponding buffer beam welding interface 1034, and the second plate 1032 and the traction beam body 102 are welded via the coupler traction welding interface 1035.

[0083] In addition, coupler mounting bolt holes 10303 and operating holes 10304 are machined in the solid area of the coupler plate 103 profile for assembling coupler bolts.

[0084] Among them, the coupler mounting bolt hole 10303 is opened on the first plate 1031. Preferably, the coupler mounting bolt hole 10303 is opened in the triangular area covered by the first plate 1031, the second plate 1032 and the third plate 1033, and the operation hole 10304 is opened on the third plate 1033.

[0085] In addition, according to Figure 7 As shown, based on the above-mentioned first structural optimization and / or second structural optimization of the coupler plate 103, the following third structural optimization can also be performed on the coupler plate 103:

[0086] The first sub-plate 10311, the corresponding second plate 1032 and the third plate 1033 form a triangular stable transition structure, and the second sub-plate 10312, the corresponding second plate 1032 and the third plate 1033 form a triangular stable transition structure.

[0087] The second plate 1032 includes a first panel 10321 and a second panel 10322 . The first panel 10321 and the second panel 10322 are welded together by a first weld seam therebetween. It is worth noting that the first weld seam is located at any position on the second plate 1032 .

[0088] The third plate 1033 includes: a third plate 10331 and a fourth plate 10332; the third plate 10331 and the fourth plate 10332 are welded by a second weld between them. It is worth noting that the second weld is located at any position on the third plate 1033, such as: the second weld coincides with the machining operation hole 10304 (such as Figure 7 As shown), of course, the second weld can also be set to have a gap between it and the machining operation hole 10304.

[0089] The first weld and / or the second weld are parallel to the first plate 1031 (or the corresponding first sub-plate 10311 or the corresponding second sub-plate 10312 ).

[0090] Among them, the first puzzle panel 10321 and the third puzzle panel 10331 are both fixed to the first plate 1031 (or, the corresponding first sub-plate 10311 or the corresponding second sub-plate 10312), the first puzzle panel 10321, the third puzzle panel 10331 and the first plate 1031 are a profile structure, that is: the third profile structure (or, the first puzzle panel 10321, the third puzzle panel 10331 and the corresponding first sub-plate 10311 form a profile structure, the first puzzle panel 10321, the third puzzle panel 10331 and the corresponding second sub-plate 10312 form a profile structure).

[0091] The end of the second panel 10322 is fixed to the end of the fourth panel 10332 and forms a profile structure, namely, a fourth profile structure.

[0092] The third profile structure corresponds to the fourth profile structure one-to-one, and the corresponding third profile structure and the fourth profile structure are welded together via a first weld and a second weld to form a triangular structure. The welding method between the third profile structure and the fourth profile structure (the welding method of the first weld and the welding method of the second weld) includes, but is not limited to, one or more of the following: arc welding, friction welding, and friction stir welding.

[0093] Example 4

[0094] according to Figure 1 and 2As shown, based on any of the above embodiments, in this embodiment, the following settings are made for the buffer beam 101, namely:

[0095] The buffer beam 101 includes: a first beam 1011 and a second beam 1012; wherein, the first beam 1011 and the second beam 1012 are welded to the buffer beam welding interface 1034 located on the first sub-plate 10311 and the second sub-plate 10312 respectively, and the spacing between the first beam 1011 and the second beam 1012 gradually increases from the coupler plate 103 to the end cross beam 3, that is: from the coupler plate 103 to the end cross beam 3, the first beam 1011 and the second beam 1012 are in an "eight" shape structure, so that from the coupler plate 103 to the end cross beam 3, they can be gradually welded to a wider area of the chassis floor 2, so that the load is evenly distributed over a larger area of the chassis floor 2, thereby alleviating stress concentration.

[0096] In another embodiment, the following configuration is performed for the traction beam body 102, namely: the traction beam body 102 includes: a first traction beam 1021 and a second traction beam 1022; wherein, both ends of the first traction beam 1021 and the second traction beam 1022 are welded between the coupler plate 103 (second plate (1032)) and the traction beam reinforcement structure 203, and the distance between the first traction beam 1021 and the second traction beam 1022 gradually decreases from the coupler plate 103 to the traction beam reinforcement structure 203.

[0097] It is worth noting that, based on the settings of any of the above embodiments, the following settings are also made: the integrated structure of the traction box and the chassis floor also includes: a lower cover plate 104, which is welded to the end face of the buffer beam 101, the coupler plate 103 and the traction beam body 102 away from the chassis floor 2; and, in the direction perpendicular to the chassis floor 2, the height from the coupler plate 103 to the buffer beam 101 gradually decreases, and the height from the coupler plate 103 to the traction beam reinforcement structure 203 gradually decreases.

[0098] Because the lower cover plate 104 is welded to the end surface of the buffer beam 101, the coupler plate 103 and the traction beam body 102 that is away from the chassis floor 2, in this embodiment, the lower cover plate 104, the buffer beam 101, the coupler plate 103, the traction beam body 102 and the chassis floor 2 form a box structure.

[0099] In addition, since the height from the coupler plate 103 to the buffer beam 101 gradually decreases in the direction perpendicular to the chassis floor 2, the height from the coupler plate 103 to the traction beam reinforcement structure 203 also gradually decreases. Because the lower cover plate 104 needs to be welded to the end surface of the buffer beam 101, the coupler plate 103, and the traction beam body 102 that is away from the chassis floor 2, the lower cover plate 104 needs to bend and adapt to the height fluctuations of the buffer beam 101, the coupler plate 103, and the traction beam body 102 in the direction perpendicular to the chassis floor 2.

[0100] Specifically, the end cross beam 3 is welded to the chassis floor 2 and the traction box 1. Since the traction beam body 102 gradually transitions from the same height as the coupler plate 103 to the same height as the traction beam reinforcement structure 203 in the direction perpendicular to the chassis floor 2, the lower cover plate 104, as a transversely bent plate, will also gradually close from the coupler plate 103 to the traction beam reinforcement structure 203 until they are finally butt-welded together; the lower cover plate 104 is a bent plate in the traction beam body 102 area, and is the same as the traction beam body 102 (first traction beam 1021 and the second pull beam 1022) are fully welded together; the lower cover plate 104 in the coupler plate 103 area is a bent plate, which is welded together with the machined coupler plate 103 profile (the first plate 1031, the second plate 1032 and the third plate 1033); the lower cover plate 104 in the buffer beam 101 area is a bent plate, which is welded together with the buffer beam 101 profile (the first beam 1011, the second beam 1012); the lower cover plate 104 can be selected as a whole or multiple plates welded together in the low stress area.

[0101] Therefore, in this embodiment, a simple integrated structure of beams and chassis floor 2 is provided, in which a design combining profiles and plates is adopted, stress concentration areas are avoided as much as possible by welding and are machined by parent materials, and welding joints are welded in the form of butt joints as much as possible, which greatly improves the structural strength and has a significant lightweight effect.

[0102] Example 5

[0103] according to Figure 1-6 As shown, based on any of the above embodiments, this embodiment provides an integrated structure of a traction box and a chassis floor.

[0104] The utility model provides a traction box and chassis floor integrated structure, which provides a traction box and floor integrated structure with simple structure and high strength. The structure comprises a traction box 1, a chassis floor 2 and an end crossbeam 3.

[0105] The traction box 1 includes a buffer beam 101 , a traction beam body 102 , a coupler plate 103 , and a lower cover plate 104 .

[0106] The lower cover plate 104 can be designed as a whole or multiple pieces according to process requirements, and then welded together with other components of the traction box 1 to form a traction box body.

[0107] The end cross beam 3 is a profile structure, integrated with the floor welding interface 302 of the welded chassis floor 2.

[0108] The chassis floor 2 is formed by welding an odd number of sub-plates 20 (the sub-plates 20 are profiles). The chassis floor 2 is designed to be bilaterally symmetrical, and the butt welds between adjacent sub-plates 20 avoid the assembly welds between the traction box 1 and the chassis floor 2.

[0109] Furthermore, the central sub-panel 20 integrates the traction beam reinforcement structure 203; the front end of the traction beam reinforcement structure 203 is machined to form a butt joint for welding the traction beam body 102. Furthermore, because the underframe floor 2 (the central sub-panel 20) integrates the traction beam reinforcement structure 203, the geometric transition point between the traction box 1 and the underframe floor 2 becomes the parent material, significantly improving the structure's load-bearing capacity.

[0110] At the same time, the coupler plate 103 is an integral extruded profile or two pieces spliced together, and an interface for welding with the buffer beam 101 and the traction beam body 102 in the form of a butt joint is reserved, reducing the use of T-type welded joints and instead using more butt joints, thereby improving the fatigue resistance of the structure.

[0111] Specifically, according to Figure 1-5 As shown, the utility model provides an integrated structure of a traction box and a chassis floor, comprising a traction box 1, a chassis floor 2 and an end crossbeam 3. The traction box 1, the chassis floor 2 and the end crossbeam 3 are welded together. The traction box 1 comprises a coupler plate 103, a traction beam body 102 and a buffer beam 101. The coupler plate 103 adopts an integrally extruded aluminum profile, and has reserved welding interfaces with the buffer beam 101 (buffer beam welding interface 1034) and the traction beam body 102 respectively. The welding interface corresponding to the buffer beam 101 is an aluminum profile butt weld, and the edge of the profile is integrated with a welded back plate; the interface with the traction beam body 102 (the end of the second plate 1032 away from the first plate 1031) is a plate butt weld, and a coupler mounting bolt hole 10303 is machined in the solid area of the coupler plate 103 profile (the coupler mounting bolt hole 10303 is opened on the first plate 1031), and an operating hole 10304 is machined on the third plate 1033 for assembling the coupler bolt.

[0112] The coupler plate 103 is first butt-welded to the buffer beam 101 and the traction beam body 102, and then welded together with the lower cover plate 104. The sub-plate 20 profiles of the three underframe floors 2 are integrated with the welding back plates and welded together, and then welded together with the traction beam body 102 to form a box-type structure. The traction beam reinforcement structure 203 is butt-welded to the lower cover plate 104 and the traction beam body 102.

[0113] A floor welding interface 302 for welding the chassis floor 2 is provided on the end crossbeam 3 profile, and an arc-shaped area interface 301 is machined in the middle of the end crossbeam.

[0114] The end cross beam 3 is welded to the chassis floor 2 and the traction box 1. In the direction from the coupler plate 103 to the traction beam reinforcement structure 203, the height of the traction beam body 102 gradually transitions from the same height as the coupler plate 103103 to the same height as the traction beam reinforcement structure 203. The transversely bent plate (lower cover plate 104) gradually closes from the coupler plate 103 to the traction beam reinforcement structure 203 and is finally welded together.

[0115] The lower cover plate 104 is a bent plate in the traction beam body 102 area, and is fully welded to the traction beam body 102 (the first traction beam 1021 and the second traction beam 1022); the lower cover plate 104 is a bent plate in the coupler plate 103 area, and is welded to the machined coupler plate 103 profile (the first plate 1031, the second plate 1032 and the third plate 1033); the lower cover plate 104 is a bent plate in the buffer beam 101 area, and is welded to the buffer beam 101 profile (the first beam 1011 and the second beam 1012); the lower cover plate 104 can be selected as a whole or multiple plates welded together in the low stress area.

[0116] The floor structure is formed by butting three profiles (right sub-plate 200, middle sub-plate 201, and left sub-plate 202), and the middle sub-plate 201 and the integrated traction beam reinforcement structure 203 are machined from the profiles.

[0117] The utility model provides a simple structure of the integrated structure of the traction box and the chassis floor. The structure adopts a design combining profiles and plates. The stress concentration area is avoided as much as possible by welding and is machined by the parent material. The welded joints are butt joints as much as possible, which greatly improves the structural strength and has a significant lightweight effect.

[0118] Moreover, the location where the vertical height of the traction box and the chassis floor 2 suddenly changes is a high-stress area where the longitudinal load transfer path of the vehicle body changes. The welded structure is changed to a base material structure machined from the chassis floor 2 profile, avoiding the reduction of material mechanical properties caused by welding.

[0119] Furthermore, the coupler plate 103 utilizes a one-piece or two-piece profile structure, with integrated welded interfaces for the bumper beam 101 and the traction beam body 102. This replaces the T-joint with a butt joint, avoiding stress concentration areas and offering superior fatigue resistance compared to T-joints. The two bumper beams 101 are closest in the lateral direction of the coupler plate 103. From the coupler plate 103 to the end crossbeam 3, they can be welded progressively to a wider area of the undercarriage floor 2, evenly distributing the load across a wider area of the undercarriage floor 2 and alleviating stress concentration.

[0120] Moreover, the buffer beam 101 is welded to the corresponding position of the third plate 1033 of the coupler plate 103, so that the structural force transmission is more coordinated.

[0121] Moreover, the back of the coupler plate 103 is formed of an integrated profile as a single piece with a third plate 1033, and a stable transition structure of a triangle is formed by the first plate 1031, the second plate 1032 and the third plate 1033, which not only avoids the degradation of the parent material performance caused by the welding reinforcement structure, but also the thickness change of the third plate 1033 formed of the profile is more flexible than that of the plate welding, and the structure can be designed as a better solution according to the strength requirements.

[0122] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the above-mentioned module, program segment or a part of the code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions.

[0123] It should be noted that, in this application, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element limited by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0124] Although the embodiments disclosed in this application are as described above, the above contents are merely embodiments adopted to facilitate understanding of this application and are not intended to limit this application. Any person skilled in the art of the present application may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application. However, the scope of patent protection of this application shall still be based on the scope defined by the attached claims.

Claims

1. A traction box and chassis floor integrated structure, characterized in that: include: End cross beam (3), traction box (1), chassis floor (2) and traction beam reinforcement structure (203); Wherein, one end of the traction box (1) and one end of the chassis floor (2) are both welded to the same side of the end crossbeam (3), and the traction box (1) is welded to the chassis floor (2); Furthermore, the traction beam reinforcement structure (203) is fixed to a side of the chassis floor (2) away from the end cross beam (3), and the traction beam reinforcement structure (203) is welded to an end of the traction box (1) away from the end cross beam (3) in the form of a butt joint.

2. The integrated structure of traction box and chassis floor according to claim 1, characterized in that: The traction beam reinforcement structure (203) and the chassis floor (2) are both profile structures; The traction beam reinforcement structure (203) and the chassis floor (2) are integrally formed.

3. The integrated structure of traction box and chassis floor according to claim 2, characterized in that: The chassis floor (2) comprises: The sub-plates (20) are arranged in a plurality, the plurality of sub-plates (20) are sequentially arranged along the length direction of the end cross beam (3), and adjacent sub-plates (20) are welded; The traction box (1) and the traction beam reinforcement structure (203) are respectively welded to the corresponding sub-plates (20), and a gap exists between the weld between the traction box (1) and the corresponding sub-plate (20) and the weld between adjacent sub-plates (20).

4. The integrated structure of traction box and chassis floor according to claim 1, characterized in that: The traction box (1) comprises: a buffer beam (101), a coupler plate (103) and a traction beam body (102); The buffer beam (101) and the traction beam body (102) are respectively welded to both sides of the coupler plate (103), and the end of the buffer beam (101) away from the coupler plate (103) is welded to the end crossbeam (3); The end of the traction beam body (102) away from the coupler plate (103) is welded to the traction beam reinforcement structure (203).

5. The integrated structure of traction box and chassis floor according to claim 4, characterized in that: The coupler plate (103) comprises: a first plate (1031) disposed at an end of the buffer beam (101) away from the end crossbeam (3); Buffer beam welding interfaces (1034), the number of which corresponds to the buffer beam (101), and the buffer beam welding interfaces (1034) are arranged on the side of the first plate (1031) facing the buffer beam (101) for welding with the buffer beam (101); A second plate (1032) corresponds one-to-one to the traction beam body (102), and the second plate (1032) is fixed to the side of the first plate (1031) facing the traction beam body (102), and the end of the second plate (1032) away from the first plate (1031) is welded to the corresponding traction beam body (102); The third plate (1033) corresponds to the second plate (1032) one by one, and the two ends of the third plate (1033) are respectively fixed to the first plate (1031) and the corresponding second plate (1032), so that the first plate (1031), the corresponding second plate (1032) and the third plate (1033) form a triangular arrangement.

6. The integrated structure of traction box and chassis floor according to claim 5, characterized in that: The first plate (1031) comprises: a first split plate (10311) and a second split plate (10312) sequentially distributed along the length direction of the end cross beam (3); and the first split plate (10311) and the second split plate (10312) are symmetrically arranged; The buffer beam welding interface (1034), the second plate (1032) and the third plate (1033) are evenly distributed on the first sub-plate (10311) and the second sub-plate (10312).

7. The integrated structure of traction box and chassis floor according to claim 6, characterized in that: The buffer beam (101) comprises: a first beam (1011) and a second beam (1012); The first beam (1011) and the second beam (1012) are respectively welded to the buffer beam welding interface (1034) located on the first sub-plate (10311) and the second sub-plate (10312), and the spacing between the first beam (1011) and the second beam (1012) gradually increases from the coupler plate (103) to the end cross beam (3).

8. The integrated structure of the traction box and chassis floor according to any one of claims 4 to 6, characterized in that: The traction beam body (102) comprises: a first traction beam (1021) and a second traction beam (1022); The first pull beam (1021) and the second pull beam (1022) are both welded between the traction beam reinforcement structure (203) and the corresponding second plate (1032), and the distance between the first pull beam (1021) and the second pull beam (1022) gradually decreases from the coupler plate (103) to the traction beam reinforcement structure (203).

9. The integrated structure of traction box and chassis floor according to claim 8, characterized in that: Also includes: A lower cover plate (104) is welded to the end surface of the buffer beam (101), the coupler plate (103) and the traction beam body (102) away from the chassis floor (2); Moreover, in a direction perpendicular to the chassis floor (2), the height from the coupler plate (103) to the buffer beam (101) gradually decreases, and the height from the coupler plate (103) to the traction beam reinforcement structure (203) gradually decreases.

10. The integrated structure of traction box and chassis floor according to claim 5, characterized in that: One or more of the welding interface between the end cross beam (3) and the chassis floor (2) and the buffer beam welding interface (1034) is a welding interface in the form of a butt joint; One or more of the end cross beam (3), the buffer beam (101), and the first plate (1031) of the coupler plate (103) is a profile structure.

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