Traction beam, chassis, vehicle body and railway vehicle

Abstract

The embodiment of the invention provides a traction beam, a chassis, a vehicle body and a railway vehicle, the traction beam comprises two single traction beams arranged side by side, the front end of any single traction beam is provided with a bending part bending backwards so as to form a horn mouth at the front end of the traction beam, the front end of the traction beam is connected with a vehicle body buffer beam, and the rear end of the traction beam is connected with a sleeper beam; the single traction beam is provided with an insertion concave part, and the insertion concave part is arranged from inside to outside in the thickness direction; the two transverse ends of the car coupler installation base are provided with inserting and embedding convex parts respectively, the car coupler installation base is located between the two single-piece traction beams, and the inserting and embedding convex parts and the inserting and embedding concave parts on the corresponding sides are inserted, welded and fixed. A hot riveting process is canceled, the process requirements of manufacturing and maintenance are simplified, and the production efficiency is improved; a part of longitudinal drawing force and compression force borne by the car coupler mounting seat can be effectively and directly transmitted to the single traction beams on the two sides in a semi-inserting and embedding mounting mode of welding fixation, the shearing force borne by a fixed welding seam is reduced, and the bearing strength is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of traction beams, in particular to a traction beam, a bogie frame, a car body and a railway vehicle. BACKGROUND

[0002] The railway vehicle industry attaches great importance to train safety and energy saving, so in the design of the train, the requirements for high strength and light weight are becoming higher and higher. The car body, as the main load-bearing structure and heavy component of the vehicle, also has the same design pursuit. The car body structure is often a design difficulty in ensuring high strength while taking into account light weight. In the car body design process, light weight design is generally performed on components such as the bogie frame, side wall, roof, end wall, etc., and then the strength is improved by optimizing the structure and material selection of each component. The traction cushion structure of the bogie frame is the primary load-bearing part under tensile and compressive conditions. The traction cushion structure is composed of a traction beam, a bolster beam, a buffer beam, a support cross beam and a reinforcing accessory. The traction beam assembly is a connecting component, and the car coupler mounting seat is also a main load-bearing component, which is the focus of car body loading inspection. The commonly used traction beam assembly is made of two symmetrical outwardly bent groove-shaped single-piece traction beams riveted with a car coupler mounting seat and supplemented with reinforcing plates as needed. The entire traction cushion structure has the function of a support frame, and transmits the tensile and compressive load received by the car coupler mounting seat to the entire car body structure. The car coupler mounting seat is made of cast steel, and the car coupler mounting seat has a large volume and weight, leaving little room for light weight improvement. In the process of assembling the traction beam, rivets are used for riveting, which requires higher process tooling for car body manufacturing and post-maintenance, and the process is complex, resulting in low production efficiency. In order to ensure the strength of the riveting area of the traction beam assembly, the reasonable arrangement of the rivets needs to be optimized and improved several times, increasing the design and manufacturing workload. SUMMARY

[0003] The traction beam, the bogie frame, the car body and the railway vehicle provided in the embodiments of the present application solve the problems of high process tooling requirement and complex process in the process of riveting the existing car coupler mounting seat and traction beam.

[0004] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A traction beam, comprising:

[0006] Two single-piece traction beams arranged side by side, the front end of any single-piece traction beam is respectively provided with a bent portion bent away from the front end to form a flared mouth at the front end of the traction beam, the front end of the traction beam is connected with a car body buffer beam, and the rear end is connected with a bolster beam; the single-piece traction beam is provided with an insert recess, the insert recess is arranged from inside to outside along the thickness direction;

[0007] The car hook mounting seat is provided with an insertion protruding part at each of the two lateral ends, the car hook mounting seat is located between the two single-piece traction beams, and the insertion protruding part is inserted into and welded with the insertion recess part at the corresponding side.

[0008] Optionally, the insertion recess part is an insertion recess groove, which penetrates the single-piece traction beam in the thickness direction.

[0009] Optionally, the insertion recess groove is arranged to open from the bottom end of the single-piece traction beam and extend upward.

[0010] Optionally, the insertion protruding part extends along the lateral direction of the car hook mounting seat, and the top wall of the insertion protruding part forms a stepped structure with the top wall of the car hook mounting seat.

[0011] The insertion protruding part is inserted into the insertion recess groove and arranged to protrude laterally from the side wall of the single-piece traction beam.

[0012] Optionally, the vertical projection of the insertion protruding part includes a horizontal edge, a vertical edge, an inclined edge, and a bottom edge.

[0013] The first end of the horizontal edge is connected with the car hook mounting seat, the second end of the horizontal edge extends in the horizontal direction and is connected with the top end of the vertical edge, the vertical edge extends downward in the vertical direction, the bottom end of the vertical edge is connected with the top end of the inclined edge, the inclined edge extends outward in the lateral direction, the first end of the bottom edge is connected with the bottom end of the inclined edge, and the second end of the bottom edge is connected with the bottom wall of the car hook mounting seat.

[0014] Optionally, the single-piece traction beam includes:

[0015] A traction beam side stand, a traction beam upper cover plate, and a traction beam lower cover plate, the bottom edge of the insertion protruding part is arranged on the traction beam lower cover plate and welded.

[0016] Optionally, the application further includes:

[0017] A plurality of reinforcing plates, which are located between the two single-piece traction beams.

[0018] The application further provides a bottom frame, which includes a buffer beam, a bolster beam, a support cross beam, and the traction beam according to any one of the above embodiments; the buffer beam is fixedly arranged at the front end of the horn opening of the traction beam, and the bolster beam is fixedly arranged at the rear end of the traction beam.

[0019] The application further provides a car body, which includes the bottom frame according to the above embodiments.

[0020] The application further provides a railway vehicle, which includes a driver's cabin and the car body according to the above embodiments.

[0021] The traction beam provided in the embodiment of the present application comprises: two single-piece traction beams arranged side by side, and each of the single-piece traction beams is provided with a bending part bent away from the front end to form a bell mouth at the front end of the traction beam, the front end of the traction beam is connected with a car body buffer beam, and the rear end is connected with a bolster beam; the single-piece traction beam is provided with an insert recess part, and the insert recess part is arranged from inside to outside along the thickness direction; a coupler mounting seat is provided with an insert convex part at each of the two ends in the transverse direction, the coupler mounting seat is located between the two single-piece traction beams, and the insert convex part is inserted into and welded with the corresponding insert recess part.

[0022] Compared with the prior art, the traction beam, the underframe, the car body and the railway vehicle provided in the embodiment of the present application have the following technical effects:

[0023] The traction beam of the present application is composed of two single-piece traction beams arranged side by side, the front end of the traction beam is connected with a car body buffer beam, and the rear end is connected with a bolster beam; the single-piece traction beam is provided with an insert recess part, which is arranged from inside to outside along the thickness direction, and an insert convex part is arranged at each of the two ends in the transverse direction of the coupler mounting seat, and the two ends in the transverse direction of the coupler mounting seat are connected with the insert recess part of the single-piece traction beam through the insert convex part and then welded, which cancels the hot riveting process, simplifies the process requirements of manufacturing and maintenance, and improves the production efficiency; the semi-insert mounting mode of welding fixation can effectively transmit part of the longitudinal tensile force and compressive force received by the coupler mounting seat to the two single-piece traction beams, reduce the shear force borne by the fixed weld, and improve the bearing strength. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, and the illustrative embodiments of the present application and the description thereof are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 The structure schematic view of the underframe provided in the embodiment of the present application is shown in the figure;

[0026] Figure 2 The structure schematic view of the traction beam provided in the embodiment of the present application is shown in the figure;

[0027] Figure 3 The structure schematic view of the single-piece traction beam provided in the embodiment of the present application is shown in the figure;

[0028] Figure 4 The structure schematic view of the coupler mounting seat provided in the embodiment of the present application is shown in the figure.

[0029] In the drawings, the following marks are used:

[0030] Traction beam 9910, buffer beam 9911, bolster beam 9912, support cross beam 9913;

[0031] Single-piece drawbar beam 991, coupler mounting seat 992;

[0032] Inserting and embedding recess 9911, drawbar beam side stand 9912, drawbar beam upper cover plate 9913, drawbar beam lower cover plate 9914, reinforcing plate 9915;

[0033] Inserting and embedding convex part 9921, horizontal edge 99211, vertical edge 99212, bevel edge 99213, bottom edge 99214. DETAILED DESCRIPTION

[0034] The embodiments of the present application disclose a drawbar beam, a bogie, a car body and a railway vehicle, so as to solve the problems of riveting, high requirement for process tooling and complex process in the installation process of the existing coupler mounting seat and drawbar beam.

[0035] In order to make the technical solutions and advantages of the embodiments of the present application clearer, the exemplary embodiments of the present application are further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0036] Please refer to Figures 1-4 , Figure 1 A structure schematic diagram of a bogie provided by the embodiments of the present application is shown in the figure; Figure 2 A structure schematic diagram of a drawbar beam 9910 provided by the embodiments of the present application is shown in the figure; Figure 3 A structure schematic diagram of a single-piece drawbar beam 991 provided by the embodiments of the present application is shown in the figure; Figure 4 A structure schematic diagram of a coupler mounting seat 992 provided by the embodiments of the present application is shown in the figure.

[0037] In a specific embodiment, the drawbar beam 9910 includes two single-piece drawbar beams 991 arranged side by side and the coupler mounting seat 992; the front end of any single-piece drawbar beam 991 is respectively provided with a bending part bent away from the back, so as to form a horn at the front end of the drawbar beam 9910; the front end of the drawbar beam 9910 is connected with a car body buffer beam 9911, and the rear end is connected with a bolster 9912; the single-piece drawbar beam 991 is provided with an inserting and embedding recess 9911, which is arranged from inside to outside along the thickness direction;

[0038] The coupler mounting seat 992 is respectively provided with an inserting and embedding convex part 9921 at the transverse two ends; the coupler mounting seat 992 is located between the two single-piece drawbar beams 991, and the inserting and embedding convex part 9921 is inserted and fixed with the corresponding inserting and embedding recess 9911 and is welded.

[0039] The traction beam 9910 is composed of two independent single-piece traction beams 991 arranged in parallel, which are made of high-strength steel plate material by welding or forging, and arranged side by side to enhance the load-carrying capacity and stability of the overall structure. The front end of the single-piece traction beam 991 is provided with a backwardly bent bending portion, that is, the front ends of the two traction beams 9910 are bent outward, and the structure after bending forms a horn-shaped opening space at the front end of the traction beam 9910, which is used to accommodate the bumper beam 9911 structure at the front end of the car body, realize the structural butt joint and transition, and the horn area is the first energy-absorbing structure when the car body collides. The front end of the traction beam 9910 is connected with the car body bumper beam 9911 for transmitting longitudinal force and buffering impact, and the rear end of the traction beam 9910 is connected with the bolster beam 9912 to bear the weight of the car body and transmit it to the track through the bogie. The traction beam also uses high-strength steel material to improve strength and reduce weight, achieving lightweight design of the underframe.

[0040] In an embodiment, an insertion recess 9911 is provided on each single-piece traction beam 991, which is arranged from inside to outside in the thickness direction, and on the lateral direction of the traction beam 9910, with the side close to the longitudinal center line of the traction beam 9910 as the inside and the side away from the longitudinal center line as the outside. The insertion recess 9911 is used for cooperating and connecting with the insertion protrusion 9921 of the coupler mounting seat 992, and the recess structure can be a slot, a U-shaped notch or a stepped hole, etc., which can be set as needed to ensure accurate positioning and reliable connection. It provides a large welding area to improve the structural strength.

[0041] It can be understood that the coupler mounting seat 992 is arranged between the two single-piece traction beams 991 and is a key component for connecting the coupler and the car body. The two ends of the mounting seat in the lateral direction are provided with insertion protrusions 9921, which are inserted into the insertion recesses 9911 of the traction beams 9910 and fixed by welding. The insertion protrusion 9921 and the recess can be in the form of mortise and tenon, buckle or sliding. The welding method can be groove welding, fillet welding, etc. to ensure the connection strength. Through the double fixation method of insertion and welding, the integrity and reliability of the structure are improved.

[0042] The coupler mounting seat 992 is made of high-strength steel plate material to improve the strength of the coupler mounting seat 992 and reduce the weight. After the coupler mounting seat 992 is inserted into the single-piece traction beam 991, it is fixed by welding. Compared with the hot riveting process, it simplifies the manufacturing and maintenance process requirements and improves the production efficiency. The semi-insertion mounting method by welding can effectively transmit part of the longitudinal tensile and compressive forces received by the coupler mounting seat 992 to the two single-piece traction beams 9910, reduce the shear force borne by the fixed weld, and improve the bearing strength.

[0043] In a specific embodiment, the insertion recess 9911 is a through groove structure for accommodating the insertion protrusion 9921, the through groove allows the insertion protrusion 9921 of the drawbar mounting seat 992 to be inserted directly from one side and penetrate through the entire drawbar beam 9910 structure, improving assembly efficiency; It is also convenient to observe whether the insertion is in place, and to improve process controllability. At the same time, after the insertion protrusion 9921 is inserted into the through groove, welding reinforcement can be performed on the inner and outer sides of the drawbar beam 9910, improving the length and strength of the weld; Support double-sided welding, effectively prevent welding deformation and stress concentration.

[0044] Specifically, the insertion groove is arranged from the bottom end of the single-piece drawbar beam 991 and extends upward, so that the welding operation can be performed from the side or the top, improving the utilization rate of welding space, avoiding dead angle welds, and enhancing the structural reliability; At the same time, it is helpful for uniform transmission of longitudinal load, reduces local stress concentration, and improves fatigue resistance.

[0045] Further, the insertion protrusion 9921 extends along the transverse direction of the drawbar mounting seat 992, and the top wall of the insertion protrusion 9921 and the top wall of the drawbar mounting seat 992 form a stepped structure; The insertion protrusion 9921 is inserted into the insertion groove and protrudes outward from the side wall of the single-piece drawbar beam 991 along the transverse direction.

[0046] The top wall of the insertion protrusion 9921 is lower than the top wall of the drawbar mounting seat 992 to form a stepped structure; The insertion protrusion 9921 extends along the transverse direction of the drawbar mounting seat 992 and is inserted into the insertion groove and protrudes outward from the side wall of the single-piece drawbar beam 991 along the transverse direction, thereby forming welds on the inner side and the outer side, facilitating positioning and welding, and improving the external welding operation space; Welding personnel can perform reinforcement welding work outside the drawbar beam 9910, improving the connection reliability; The stepped portion can also be used as a welding bevel area to enhance the weld load capacity.

[0047] The transversely extending insertion protrusion 9921 cooperates with the through groove to enhance the transverse shear resistance; The stepped structure helps to disperse the load and avoid stress concentration, improving the fatigue life.

[0048] In this embodiment, the vertical projection of the insertion protrusion 9921 includes a horizontal edge 99211, a vertical edge 99212, an inclined edge 99213, and a bottom edge 99214;

[0049] The first end of the horizontal edge 99211 is connected with the coupler mounting seat 992, the second end of the horizontal edge 99211 extends in the horizontal direction and extends in the transverse direction away from the coupler mounting seat 992, the second end of the horizontal edge 99211 is connected with the top end of the vertical edge 99212, the vertical edge 99212 extends in the vertical direction downward, the bottom end of the vertical edge 99212 is connected with the top end of the oblique edge 99213, the oblique edge 99213 extends outward in the transverse direction, the first end of the bottom edge 99214 is connected with the bottom end of the oblique edge 99213, and the second end of the bottom edge 99214 is connected with the bottom wall of the coupler mounting seat 992.

[0050] The horizontal edge 99211, the vertical edge 99212, the oblique edge 99213 and the bottom edge 99214 form a geometric structure, which enhances the matching area between the inserted convex part 9921 and the groove, improves the load-bearing performance after assembly, and the horizontal edge 99211 and the vertical edge 99212 jointly bear the longitudinal load; the oblique edge 99213 and the bottom edge 99214 help to disperse the force to the bottom of the coupler mounting seat 992, and reduce local stress concentration. A plurality of weldable surfaces are formed between the edges, which facilitates multi-angle welding; in particular, the junction between the bottom edge 99214 and the oblique edge 99213 can be used as a weld reinforcement area. When the edges are smoothly transitioned, the mold wear can be reduced and the manufacturing efficiency can be improved.

[0051] In another embodiment, the single-piece drawbar beam 991 includes a drawbar beam side upright plate 9912, a drawbar beam upper cover plate 9913, a drawbar beam lower cover plate 9914 and a plurality of reinforcing plates 9915, and the bottom edge 99214 of the inserted convex part 9921 is seated on the drawbar beam lower cover plate 9914 and is welded and fixed; the reinforcing plates 9915 are located between two single-piece drawbar beams 991.

[0052] The drawbar beam side upright plate 9912 of the single-piece drawbar beam 991 serves as the main load-bearing structure, the drawbar beam upper cover plate 9913 bears the longitudinal load, the drawbar beam lower cover plate 9914 provides a support platform for the inserted convex part 9921, the bottom edge 99214 of the inserted convex part 9921 is seated on the drawbar beam lower cover plate 9914 to form a stable support surface, preventing the inserted convex part 9921 from sinking or deviating during assembly; ensuring that the coupler mounting seat 992 and the drawbar beam 9910 maintain good contact state. The drawbar beam lower cover plate 9914 provides a large welding area, which can realize multi-directional welding (such as fillet welding, groove welding, etc.); improve the shear resistance and fatigue resistance of the connection part.

[0053] The reinforcing plates 9915 are arranged between two single-piece drawbar beams 991, and a plurality of reinforcing plates 9915 can be arranged in the length direction to prevent relative deformation between the two single-piece drawbar beams 991, and to share the concentrated load from the coupler mounting seat 992, reduce local stress concentration, and prolong the service life.

[0054] On the basis of the above-mentioned embodiments, the application further provides a chassis, comprising a buffer beam 9911, a bolster beam 9912, a support beam 9913 and the traction beam 9910 of any one of the above-mentioned embodiments; the buffer beam 9911 is fixedly arranged at the front end of the traction beam 9910, and the bolster beam 9912 is fixedly arranged at the rear end of the traction beam 9910.

[0055] The application further provides a vehicle body, comprising the chassis described in the above-mentioned embodiments.

[0056] The application further provides a railway vehicle, comprising a cab and the vehicle body described in the above-mentioned embodiments.

[0057] Although the preferred embodiments of the application have been described, those skilled in the art who once understand the basic creative concept can make further changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the application.

[0058] Obviously, those skilled in the art can make various modifications and variations to the application without departing from the spirit and scope of the application. Thus, if these modifications and variations of the application fall within the scope of the claims of the application and their equivalent technologies, the application also intends to include these modifications and variations.

Claims

1. A traction beam, characterized in that: include: Two single-piece traction beams are arranged side by side, each of the single-piece traction beams having a bent portion bent in opposite directions at the front end thereof to form a bell mouth at the front end thereof, the front end of the traction beam being connected to the vehicle body buffer beam, and the rear end being connected to the bolster beam; the single-piece traction beam is provided with an inserting recess, the inserting recess being arranged from the inside to the outside along the thickness direction; The coupler mounting seat is provided with an inserting convex portion at both transverse ends. The coupler mounting seat is located between the two single-piece traction beams, and the inserting convex portion is inserted into and welded to the inserting concave portion on the corresponding side.

2. The traction beam according to claim 1, characterized in that: Any of the inserting recesses is an inserting groove, and the inserting groove passes through the single-piece traction beam along the thickness direction.

3. The traction beam according to claim 2, characterized in that: The inserting groove opens from the bottom end of the single-piece traction beam and extends upward.

4. The traction beam according to claim 2, characterized in that: The inserting protrusion extends in the transverse direction of the coupler mounting seat, and the top wall of the inserting protrusion and the top wall of the coupler mounting seat form a step structure; The inserting protrusion is inserted into the inserting groove and is arranged to protrude from the side wall of the single-piece traction beam in the transverse direction.

5. The traction beam according to claim 4, characterized in that: The vertical projection of the inserting protrusion includes a horizontal side, a vertical side, a hypotenuse and a bottom side; The first end of the horizontal edge is connected to the coupler mounting seat, the second end of the horizontal edge extends in the horizontal direction and is connected to the top end of the vertical edge, the vertical edge extends downward in the vertical direction, the bottom end of the vertical edge is connected to the top end of the oblique edge, the oblique edge extends laterally outward, the first end of the bottom edge is connected to the bottom end of the oblique edge, and the second end of the bottom edge is connected to the bottom wall of the coupler mounting seat.

6. The traction beam according to claim 5, characterized in that: The single-piece traction beam comprises: The traction beam side vertical plate, the traction beam upper cover plate and the traction beam lower cover plate, the bottom edge of the embedded protrusion is located on the traction beam lower cover plate and is welded and fixed.

7. The traction beam according to claim 1, characterized in that: Also includes: A plurality of reinforcing plates are located between the two single-piece traction beams.

8. A chassis, characterized in that: It comprises a buffer beam, a bolster beam, a supporting crossbeam and the traction beam according to any one of claims 1 to 7; the buffer beam is fixedly arranged at the front end of the bell mouth of the traction beam, and the bolster beam is fixedly arranged at the rear end of the traction beam.

9. A vehicle body, characterized in that: Comprising the chassis according to claim 8.

10. A rail vehicle, characterized in that: The vehicle comprises a driver's cab and the vehicle body according to claim 9.

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