A torsion-resistant and load-equalizing welded frame and bogie

Abstract

The present invention provides a torsion-resistant and load-sharing welded frame and a bogie, which relate to the technical field of vehicle bogies. Among them, an torsion-resistant and load-sharing welded frame comprises a crossbeam and two side beams, wherein the side beams are provided with mounting grooves for embedding the ends of the crossbeams; an elastic connection assembly is provided in the mounting grooves, and the side beams are connected to the corresponding ends of the crossbeams via the elastic connection assembly. And a bogie comprises the above-mentioned torsion-resistant and load-sharing welded frame. Based on the technical solution of the present invention, the load-sharing performance of the welded frame and the bogie is improved, the relative rotation between the crossbeam and the side beams is suppressed, and while ensuring the anti-diameter stiffness of the bogie, the curve passing performance of the vehicle and the running stability during high-speed straight-line operation are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle bogies, and in particular to an anti-torsion and evenly loaded welded frame and a bogie. Background Art

[0002] The bogie is the part of the vehicle that runs along the track under the action of traction. Its function is to ensure that the vehicle runs flexibly, safely and smoothly along the rails and through curves; reliably bear the various loads acting on the vehicle and transmit them to the rails; alleviate the mutual impact between the vehicle and the rails, reduce vehicle vibration, ensure sufficient running stability and good running quality, and have a reliable braking mechanism to enable the vehicle to have a good braking effect.

[0003] The existing utility model patent with authorization announcement number CN203793350U discloses a 2C-axle welded frame bogie, which includes a welded frame, an axle box spring suspension device and a basic braking device; wherein, the welded frame is connected to the car body through a center pin, and is mainly composed of a center plate beam and two side beams welded into an H-shaped integral structure. The side beams and center plate beams both adopt a box-type structure consisting of an upper cover plate, a lower cover plate and a web plate, and are all box-type variable-section beams welded with steel plates.

[0004] The welded frame bogie adopting the above-mentioned technical solution has the technical advantages of energy saving and environmental protection, high anti-corrosion rigidity and high operating speed. However, this two-axle welded frame bogie has the following disadvantages:

[0005] (1) The welded frame is generally an integrated H-shaped structure, with the crossbeam and two side beams welded together. This results in no relative movement between the crossbeam and the two side beams. This makes the welded frame incapable of adapting when the vehicle passes through railway lines such as triangular pits, resulting in a large wheel-rail load reduction rate, which may even exceed the standard (GB / T 5599-1985);

[0006] (2) The vehicle's load-balancing capacity on the relief curves where the vehicle transitions from a straight line to a curved section and vice versa is poor, and the curve passing performance is poor;

[0007] (3) Existing welded frame bogies are generally used for special freight cars, which have special requirements for routes and applications, and relatively harsh application conditions, and have obvious limitations. Summary of the Invention

[0008] The present invention provides a torsion-resistant and load-sharing welded frame and bogie. By embedding the ends of the crossbeams in mounting grooves on the side beams and connecting the crossbeams and the side beams with elastic connection components, the load-sharing performance of the welded frame and the bogie is improved, and the relative rotation between the crossbeams and the side beams is suppressed. While ensuring the anti-torsion stiffness of the bogie, the vehicle's curve negotiating performance and the operating stability during straight high-speed operation are improved.

[0009] On the one hand, the present invention provides a torsion-resistant and evenly loaded welded frame, comprising a crossbeam and two side beams, wherein the side beams are provided with mounting grooves for embedding the ends of the crossbeams; an elastic connection component is provided in the mounting grooves, and the side beams are connected to the corresponding ends of the crossbeams through the elastic connection components.

[0010] In one embodiment, the elastic connection assembly includes an upper positioning plate for connecting to the crossbeam and a lower positioning plate for connecting to the side beam, with an elastic member disposed between the upper and lower positioning plates. In this embodiment, the elastic member connects the crossbeam and the side beam via the upper and lower positioning plates, respectively, ensuring reliable installation of the elastic member.

[0011] In one embodiment, the elastic member is a torsion spring or a leaf spring. With this embodiment, due to the vertical deflection of the torsion spring or leaf spring, the crossbeam and side beams can rotate in the vehicle's nod direction. Furthermore, the torsion spring or leaf spring has a high stiffness against the rotation of the crossbeam and side beams, providing significant resistance when the crossbeam and side beams rotate relative to each other, thereby ensuring the anti-rotation stiffness of the bogie.

[0012] In one embodiment, the bottom surface of the crossbeam end and the bottom surface of the mounting slot are both provided with positioning holes; the upper positioning plate, which is connected to the crossbeam, and the lower positioning plate, which is connected to the side beam, are both provided with positioning protrusions that engage with the positioning holes. In this embodiment, the upper and lower positioning plates engage with the positioning holes in the crossbeam or side beam via the positioning protrusions, ensuring a radially free gap between the side beams and the crossbeam after assembly, thereby preventing loss of anti-diameter rigidity.

[0013] In one embodiment, the end portion of the cross beam for connecting to the side beam is provided with contact arc surfaces on both sides along the vehicle running direction.

[0014] In one embodiment, the mounting groove is provided with mating arc surfaces on both sides along the vehicle's travel direction for abutting the contact arc surface. With this embodiment, the contact arc surfaces abut the mating arc surfaces, and when the crossbeam and side beams engage in nodding relative displacement contact, arcuate contact is achieved between the crossbeam and side beams, thereby reducing resistance and lowering wear on both.

[0015] In one embodiment, arc-shaped contact protrusions are provided on both sides of the bottom surface of the end portion of the cross beam for connecting to the side beam along the vehicle running direction.

[0016] In one embodiment, the bottom surface of the mounting groove is provided with curved mating protrusions on both sides along the vehicle's travel direction, each of which is configured to abut the curved contact protrusions. With this embodiment, when the crossbeam and side beams engage in nodding relative displacement, the crossbeam can abut the curved mating protrusions on the side beams via the curved contact protrusions, achieving curved surface contact, thereby reducing resistance and wear.

[0017] In one embodiment, a reserved gap is provided between the two side walls of the crossbeam along the vehicle's travel direction and the adjacent side walls of the mounting slot. The width of the reserved gap is 2-20 mm. This embodiment provides sufficient rotational space between the crossbeam and the side beams in the nodding direction (i.e., vertical direction), ensuring load-sharing performance for the bogie. Furthermore, when the crossbeam and side beams rotate to a certain angle, they contact, preventing further rotation and maintaining the bogie's anti-slope rigidity.

[0018] Another aspect of the present invention provides a bogie comprising the above-mentioned torsion-resistant and load-sharing welded frame.

[0019] In summary, compared with the prior art, the beneficial technical effects of the present invention are:

[0020] (1) By embedding the ends of the crossbeams in the mounting grooves on the side beams and connecting the crossbeams and side beams with elastic connection components, the load-sharing performance of the welded frame and bogie is improved, and the relative rotation between the crossbeams and side beams is suppressed. While ensuring the anti-slope rigidity of the bogie, the vehicle's curve negotiating performance and running stability during straight high-speed operation are improved;

[0021] (2) By providing a contact arc surface and an arc-shaped contact protrusion on the crossbeam, and cooperating with the matching arc surface and arc-shaped matching protrusion provided on the side beam, arc-shaped contact can be achieved when the crossbeam and the side beam are in contact with each other by nodding relative displacement, thereby reducing resistance and wear on both.

[0022] (3) By setting a reserved gap between the end of the crossbeam and the side wall of the mounting groove, on the one hand, the crossbeam and the side beam have sufficient rotation space in the nodding direction to ensure the load-balancing performance of the bogie; on the other hand, it can also limit the continuous rotation of the crossbeam and the side beam, thereby ensuring the anti-diameter stiffness of the bogie. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0024] Figure 1 This is a schematic diagram of the overall structure of a torsion-resistant and evenly loaded welded frame in one embodiment of the present invention;

[0025] Figure 2 1. It is a bottom view of a torsion-resistant and load-balanced welded frame according to one embodiment of the present invention;

[0026] Figure 3 It is a cross-sectional schematic diagram of a torsion-resistant and load-balanced welded frame in one embodiment of the present invention, and is mainly used to illustrate an elastic connection component.

[0027] Figure numerals: 1. crossbeam; 101. contact arc surface; 102. arc-shaped contact protrusion; 2. side beam; 21. mounting groove; 211. mating arc surface; 212. arc-shaped mating protrusion; 3. elastic connection assembly; 31. upper positioning plate; 32. lower positioning plate; 33. elastic member; 4. positioning protrusion; 5. reserved gap. DETAILED DESCRIPTION

[0028] The present invention will be described clearly and completely below with reference to the accompanying drawings.

[0029] See attached Figure 1-2 The present invention provides a torsionally resistant, evenly loaded welded frame, comprising a crossbeam 1 and two side beams 2 connected to the crossbeam 1. To facilitate assembly of the crossbeam 1 and the side beams 2, mounting slots 21 are provided on the upper sides of the side beams 2. The longitudinal ends of the crossbeam 1 are respectively embedded in the mounting slots 21 of the crossbeams 1 on either side and connected to the crossbeams 1, forming an H-shaped structure as a whole.

[0030] In this embodiment, the mounting groove 21 can be positioned in the middle of the upper portion of the corresponding side beam 2 to ensure uniform force distribution across the welded structure. Furthermore, to ensure the stability of the connection between the crossbeam 1 and the side beam 2, the bottom surface of the mounting groove 21 can be enlarged. Specifically, a mounting plate can be positioned transversely on the bottom surface of the mounting groove 21 to increase the contact area with the end of the crossbeam 1. Of course, if the bottom surface contact area of ​​the mounting groove 21 is sufficient, the mounting plate can be omitted, and this is not a specific limitation.

[0031] At the same time, in order to further improve the stability of the connection between the cross beam 1 and the side beam 2, the two ends of the cross beam 1 in the length direction can also be similarly designed with enlarged heads, that is, the cross beam 1 as a whole can be set as follows Figure 2 The H-shaped structure shown creates enlarged ends at the ends of the crossbeam 1. During actual assembly, the enlarged ends of the crossbeam 1 are respectively embedded in the mounting grooves 21 on either side and connected to the mounting plates at the bottom of the corresponding mounting grooves 21. Of course, if the dimensions of the ends of the crossbeam 1 for connecting to the side beams 2 are sufficient, the enlarged ends of the crossbeam 1 can be eliminated. The specific size can be determined based on the actual dimensions of the crossbeam 1 and is not specifically limited to this.

[0032] See attached Figure 3 In this embodiment, to address the high wheel-rail load reduction ratios associated with conventional welded structures, the crossbeam 1 and side beams 2 are welded together, rather than being integrally welded. To connect the crossbeam 1 and side beams 2, elastic connectors 3 are provided on the side beams 2. During assembly, the side beams 2 are connected to the adjacent ends of the crossbeam 1 via the elastic connectors 3, forming an H-shaped structure.

[0033] Taking one of the side beams 2 as an example, the elastic connection assembly 3 includes an upper positioning plate 31, a lower positioning plate 32, and an elastic member 33 disposed between the upper positioning plate 31 and the lower positioning plate 32. The upper positioning plate 31 abuts the bottom surface of the end of the cross beam 1 for connecting the cross beam 1; the lower positioning plate 32 abuts the bottom surface of the mounting groove 21 for connecting the side beam 2; and the elastic member 33 is located between the upper positioning plate 31 and the lower positioning plate 32, capable of elastic expansion and contraction, with a certain vertical deflection, allowing the cross beam 1 and the side beam 2 to rotate along the vehicle's nod direction (i.e., the vertical axis).

[0034] Specifically, to facilitate assembly of the upper positioning plate 31 and the lower positioning plate 32, positioning holes are provided at the end of the crossbeam 1 (for ease of description, unless otherwise specified, "end of the crossbeam 1" will directly refer to the end of the crossbeam 1 for connecting to the side beam 2) and the bottom surface of the mounting slot 21. Correspondingly, positioning protrusions 4 are provided on the top surface of the upper positioning plate 31 (i.e., the side abutting the crossbeam 1) and the bottom surface of the lower positioning plate 32 (i.e., the side abutting the side beam 2). There can be two, three, or more positioning protrusions 4, with no specific limitation, and the positioning holes and positioning protrusions 4 are provided in a one-to-one correspondence. During actual assembly, each positioning protrusion 4 on the upper positioning plate 31 is respectively embedded in a respective positioning hole on the bottom surface of the end of the crossbeam 1, while each positioning protrusion 4 on the lower positioning plate 32 is respectively embedded in a respective positioning hole on the bottom surface of the mounting slot 21, thereby achieving installation and positioning of the upper positioning plate 31 and the lower positioning plate 32.

[0035] It should be noted that, in practical applications, the positioning projections 4 can be conical positioning pins, with the corresponding positioning holes having a corresponding shape. This allows the positioning pins to have a certain degree of taper, ensuring a radially gap-free assembly between the side beams 2 and cross beam 1, thereby preventing loss of anti-diameter rigidity. Of course, the positioning projections 4 can also adopt other structural forms, provided that the assembly stability of the side beams 2, cross beam 1, and elastic connection assembly 3 is ensured, and this is not specifically limited.

[0036] Meanwhile, the elastic member 33 can be any component with elastic expansion and contraction capabilities. For example, in one embodiment, the elastic member 33 can be a torsion spring or a leaf spring. Torsion springs or leaf springs not only have a certain degree of vertical deflection but also provide significant resistance when the crossbeam 1 and side beams 2 rotate relative to each other, thereby ensuring the anti-rotation rigidity of the bogie.

[0037] See attached Figure 1 The ends of the crossbeam 1 are provided with contact arc surfaces 101 on both sides along the vehicle's running direction. When the crossbeam 1 and the side beam 2 make contact with each other by nodding relative displacement, the ends of the crossbeam 1 abut against the side walls of the mounting groove 21 through the contact arc surfaces 101, which helps to reduce resistance and wear.

[0038] In another embodiment, to further reduce resistance and wear, matching curved surfaces 211 may be provided on either side of the mounting groove 21 on the side beam 2 along the vehicle's travel direction. Thus, when the cross beam 1 and side beam 2 engage in nodding relative displacement, the end of the cross beam 1 contacts the matching curved surfaces 211 on the mounting groove 21 via the contact curved surfaces 101, further reducing resistance and wear.

[0039] In another embodiment, the bottom surface of the end of the crossbeam 1 is provided with arcuate contact protrusions 102 on both sides along the vehicle's travel direction; correspondingly, the bottom surface of the mounting groove 21 is provided with arcuate mating protrusions 212 on both sides along the vehicle's travel direction. In this way, when the crossbeam 1 and the side beam 2 engage in nodding relative displacement, the end of the crossbeam 1 can abut against the arcuate mating protrusions 212 on the bottom surface of the mounting groove 21, achieving arcuate contact, thereby further reducing resistance and wear.

[0040] It should be noted that the specific locations of the contact arc surface 101, mating arc surface 211, arc-shaped contact protrusion 102, and arc-shaped mating protrusion 212 can be fine-tuned based on actual conditions. Typically, the locations of the contact arc surface 101, mating arc surface 211, arc-shaped contact protrusion 102, and arc-shaped mating protrusion 212 can be determined through repeated experiments at an early stage to determine the high-frequency contact locations when the crossbeam 1 and side beam 2 experience nodding relative displacement contact.

[0041] In this embodiment, in order to ensure the load-sharing performance of the bogie, a reserved gap 5 can be set between the two side walls of the end of the crossbeam 1 along the vehicle's running direction and the adjacent side walls of the mounting groove 21. In this way, when the crossbeam 1 and the side beam 2 rotate relative to each other, the reserved gap 5 ensures that there is enough rotation space between the two in the vehicle's nodding direction, thereby ensuring the load-sharing performance of the bogie. However, the width of the reserved gap 5 should be flexibly controlled. When the two rotate relative to each other by a certain angle, the crossbeam 1 should contact the side beam 2, thereby restricting the two from continuing to rotate, so as to ensure the anti-diameter stiffness of the bogie. In this embodiment, the width of the reserved gap 5 can be flexibly optimized and designed according to actual design requirements, so as to meet the vehicle's anti-diameter stiffness and load-sharing performance requirements. Normally, the width of the reserved gap 5 can be set to 2-20mm. The specific value is determined according to the actual design requirements and is not specifically limited.

[0042] Meanwhile, the present invention also provides a bogie including the above-mentioned anti-torsion load-sharing welded frame. As for other structural components of the bogie, they belong to the existing technology in this field and are not the focus of this embodiment, so they will not be described here.

[0043] In the description of the present invention, it should be understood that terms such as "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", and "right" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0044] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A torsion-resistant and load-sharing welded frame, comprising a crossbeam and two side beams, characterized in that: The side beam is provided with a mounting groove for embedding the end of the cross beam; an elastic connection component is provided in the mounting groove, and the side beam is connected to the corresponding end of the cross beam through the elastic connection component; The elastic connection assembly includes an upper positioning plate for connecting the crossbeam and a lower positioning plate for connecting the side beam. An elastic member is provided between the upper positioning plate and the lower positioning plate. The elastic member is a torsion spring or a leaf spring.

2. The torsion-resistant and load-balanced welded frame according to claim 1, characterized in that: The bottom surface of the crossbeam end and the bottom surface of the mounting groove are both provided with positioning holes; the side of the upper positioning plate used to connect to the crossbeam and the side of the lower positioning plate used to connect to the side beam are both provided with positioning protrusions for plugging and cooperating with the positioning holes.

3. The torsion-resistant and load-balanced welded frame according to claim 1, characterized in that: The end portion of the cross beam used for connecting the side beam is provided with contact arc surfaces on both sides along the running direction of the vehicle.

4. The torsion-resistant and load-balanced welded frame according to claim 3, characterized in that: Matching arc surfaces for abutting against the contact arc surface are provided on both sides of the installation groove along the vehicle running direction.

5. The torsion-resistant and load-balanced welded frame according to claim 1, characterized in that: Arc-shaped contact protrusions are provided on both sides of the bottom surface of the end portion of the cross beam for connecting to the side beam along the vehicle running direction.

6. The torsion-resistant and load-balanced welded frame according to claim 5, characterized in that: Arc-shaped matching protrusions for abutting against the arc-shaped contact protrusions are provided on both sides of the bottom surface of the installation groove along the vehicle running direction.

7. A torsion-resistant and load-balanced welded frame according to any one of claims 1 to 6, characterized in that: A reserved gap is provided between the two side walls of the end portion of the cross beam along the vehicle running direction and the adjacent side walls of the installation groove, and the width of the reserved gap is 2-20 mm.

8. A bogie, characterized in that: It comprises the torsion-resistant and load-balanced welded frame as described in any one of claims 1 to 7.

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