Bogie frame, bogie and rail vehicle

Abstract

The embodiment of the invention provides a bogie frame, a bogie and a railway vehicle, a side beam upper cover plate and a side beam lower cover plate of the bogie frame protrude out of a side beam vertical plate along the transverse inner side and form a bearing connector, and the bearing connector is provided with a connecting bent plate and connected with the side beam upper cover plate, the side beam lower cover plate and the side beam vertical plate. Meanwhile, the transverse direction of the connecting bent plate and the side beam vertical plate are provided with a gap to form a double-inner-cavity structure with the side beam, so that the longitudinal rigidity of the side beam is improved, the strength of the connecting part of the side beam and the cross beam is improved, the high-speed operation requirement is met, and the safety of the framework is improved.

Description

Technical Field

[0001] The present application relates to the technical field of bogies, and in particular to a bogie frame, a bogie and a rail vehicle. Background Art

[0002] The urban rail transit is in an important position in the "four-network integration" of rail transit. The urban rail transit has the ability to interconnect with trunk railways and intercity railways, and the demand and performance requirements for urban rapid vehicles are getting higher and higher. The bogie frame is the core part of the train and carries the safety of train operation.

[0003] The structural type and performance parameters of the bogie are designed according to the user's usage conditions, limits and performance indicators. Modern simulation analysis methods are used to carry out necessary static strength and fatigue analysis on important parts of the bogie to achieve parameter optimization.

[0004] The frame structure is mainly "H"-shaped, and the connection between the crossbeam and the side beam is divided into the connection between the tubular beam and the box-type side beam and the connection between the box-type crossbeam and the box-type side beam. For example, the bogie frame includes two side beams and one crossbeam, and both the crossbeam and the side beam are box-type structures. The upper and lower covers of the side beam are butt-jointed with the upper and lower covers of the crossbeam, and the inner and outer vertical plates of the crossbeam are connected with the inner plates of the side beam. The connection between the crossbeam and the side beam is the main stress-bearing area of ​​the frame. The force generated by the bending and twisting of the side beam of this structural frame relative to the crossbeam is only borne by the welds between the inner and outer vertical plates of the crossbeam and the inner vertical plates of the side beam, the butt welds between the upper and lower covers of the crossbeam and the upper and lower covers of the side beam, and the upper and lower covers of the side beam. The structure of the connection between the crossbeam and the side beam of this frame is not strong enough, the arc of the upper and lower covers of the side beam is under great stress, and the safety margin is small. Summary of the invention

[0005] The embodiments of the present application provide a bogie frame, a bogie and a rail vehicle to solve the problems of insufficient structural strength at the connection between the cross beam and the side beam of the existing frame and greater stress at the arc of the upper and lower cover plates of the side beam.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A bogie frame comprises two side beams and a cross beam located between the two side beams, wherein both the side beams and the cross beam are box beam structures:

[0008] The side beam comprises: a side beam upper cover plate, a side beam lower cover plate and two side beam vertical plates, wherein the side beam upper cover plate and the side beam lower cover plate protrude from the side beam vertical plates along the lateral inner side to form a receiving interface;

[0009] A connecting bent plate is inserted into the receiving interface in the longitudinal direction and is respectively welded to the upper cover plate of the side beam and the lower cover plate of the side beam; the longitudinal ends of the connecting bent plate are respectively connected to the side beam upright plates in the receiving interface, and the connecting bent plate is spaced apart from the side beam upright plates in the transverse direction to form an inner cavity with the side beam;

[0010] The crossbeam includes: a crossbeam upper cover plate, a crossbeam lower cover plate and two crossbeam upright plates; the crossbeam is H-shaped, and the crossbeam upright plates of the connecting parts at both ends of the crossbeam are inserted into the receiving interface and welded to the connecting bent plate of the receiving interface, the side beam upper cover plate and the side beam lower cover plate; the crossbeam upper cover plate of the connecting part is connected to the side beam upper cover plate of the receiving interface, and the crossbeam lower cover plate of the connecting part is butt-jointed with the side beam lower cover plate of the receiving interface.

[0011] Optionally, the connection parts at both ends of the beam also include a frame upper cover plate, which is located above the beam vertical plate, one lateral end of the frame upper cover plate is connected to the beam upper cover plate, and the other lateral end of the frame upper cover is connected to the side beam upper cover plate of the receiving interface.

[0012] Optionally, each of the connecting parts includes two connecting sub-parts, and the two connecting sub-parts are respectively inclined toward the transverse center line thereof;

[0013] The two cross beam uprights of each connecting section are inserted into the receiving interface and welded to the side beam.

[0014] Optionally, the side beam upright plate and the side beam upper cover plate located in the middle of the longitudinal direction are respectively higher than the cross beam upright plate and the cross beam upper cover plate of the connecting part, and the cross beam upright plates of the connecting part located at the two ends in the transverse direction are higher than the cross beam upright plate located in the middle of the transverse direction; the frame upper cover plate is arranged in a straight line from outside to inside in the transverse direction and connects the side beam upper cover plate located in the middle of the longitudinal direction and the cross beam upper cover plate of the connecting part.

[0015] Optionally, it also includes:

[0016] A motor hanger assembly, comprising two motor hanger uprights and a motor hanger, wherein the two motor hanger uprights are located outside the middle of the beam and arranged in the transverse direction, and any one of the motor hangers is plugged into the upper cover plate of the beam, and the lower cover plate of the beam protrudes into the installation notch formed by the uprights of the beam, and is respectively welded to the upper cover plate of the beam, the lower cover plate of the beam and the uprights of the beam;

[0017] The motor hanger is arranged on the surface of the motor hanger stand facing away from the cross beam.

[0018] Optionally, a first reinforcing rib plate is provided between the two motor hangers, and a second reinforcing rib plate is provided on the transverse outer surface of any one of the motor hangers; the first reinforcing rib plate and the second reinforcing rib plate are respectively welded to the crossbeam vertical plate.

[0019] Optionally, the motor hanger has a step structure for limiting the position of the threaded fastener.

[0020] Optionally, it also includes:

[0021] The brake hanger assembly is located at the end of the side beam, plugged into the mounting notch formed by the side beam upper cover plate and the two side beam upright plates, and respectively welded to the side beam upper cover plate, the cap tube upper cover plate and the side beam upright plates.

[0022] Optionally, it also includes:

[0023] The pivot arm positioning seat is located between the middle and end of the lower cover plate of the side beam. The pivot arm positioning seat includes two parallel clamp seats with grooves below. A bun-shaped mounting hole for installing a threaded fastener is provided above the groove.

[0024] The present application also provides a bogie, comprising the bogie frame described in any one of the above embodiments.

[0025] The present application also provides a rail vehicle, comprising the bogie described in the above embodiment.

[0026] Compared with the prior art, the bogie frame, bogie and rail vehicle provided in the embodiments of the present application have the following technical effects:

[0027] In the present application, the side beam upper cover plate and the side beam lower cover plate protrude from the side beam upright plate along the transverse inner side and form a receiving interface. The receiving interface is provided with a connecting bent plate, and is respectively connected to the side beam upper cover plate, the side beam lower cover plate and the side beam upright plate. At the same time, the connecting bent plate is laterally provided with a spacer and the side beam upright plate to form a double inner cavity structure with the side beam, thereby improving the longitudinal stiffness of the side beam, and at the same time improving the strength of the connecting part of the side beam and the cross beam, so that it can adapt to the requirements of high-speed operation and improve the safety of the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 A schematic structural diagram of a bogie frame provided in an embodiment of the present application;

[0030] Figure 2 A schematic diagram of the structure of the receiving interface provided in the embodiment of the present application;

[0031] Figure 3 A schematic diagram of the installation structure of the connecting bent plate provided in an embodiment of the present application;

[0032] Figure 4 A schematic diagram of the structure of a motor hanger assembly provided in an embodiment of the present application;

[0033] Figure 5 A schematic diagram of the lateral structure of the motor hanger assembly provided in an embodiment of the present application;

[0034] Figure 6 A schematic diagram of the structure of a brake hanger assembly provided in an embodiment of the present application;

[0035] Figure 7 A schematic diagram of the structure of the rotating arm positioning seat provided in an embodiment of the present application;

[0036] Figure 8 A schematic diagram of the lateral structure of the rotating arm positioning seat provided in an embodiment of the present application.

[0037] The following are marked in the accompanying drawings:

[0038] Side beam 1, cross beam 2, motor hanger assembly 3, brake hanger assembly 4, swing arm positioning seat 5;

[0039] Side beam upper cover plate 11, side beam lower cover plate 12, side beam vertical plate 13, connecting bent plate 14, receiving interface 15;

[0040] The crossbeam upper cover plate 21, the crossbeam lower cover plate 22, the crossbeam vertical plate 23, and the frame upper cover plate 24;

[0041] Motor hanger stand plate 31, first reinforcing rib plate 32, second reinforcing rib plate 33, step structure 34;

[0042] Bun-shaped mounting hole 51. DETAILED DESCRIPTION

[0043] The embodiment of the invention discloses a bogie frame, a bogie and a rail vehicle, so as to solve the problems that the connection between the cross beam and the side beam of the existing frame is insufficient in structural strength and the arc of the upper and lower cover plates of the side beam is subjected to greater stress.

[0044] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of 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.

[0045] See also Figure 1-8 , Figure 1A schematic structural diagram of a bogie frame provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of the receiving interface provided in the embodiment of the present application; Figure 3 A schematic diagram of the installation structure of the connecting bent plate provided in an embodiment of the present application; Figure 4 A schematic diagram of the structure of a motor hanger assembly provided in an embodiment of the present application; Figure 5 A schematic diagram of the lateral structure of the motor hanger assembly provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of a brake hanger assembly provided in an embodiment of the present application; Figure 7 A schematic diagram of the structure of the rotating arm positioning seat provided in an embodiment of the present application; Figure 8 A schematic diagram of the lateral structure of the rotating arm positioning seat provided in an embodiment of the present application.

[0046] In a specific embodiment, the bogie frame provided by the present application includes two side beams 1 and a cross beam 2 located between the two side beams 1, the two side beams 1 are arranged in parallel along the longitudinal direction of the vehicle body, and the lateral ends of the cross beam 2 are respectively welded to the corresponding side beams 1; the side beams 1 and the cross beams 2 are both box beam structures to improve the connection strength; specifically, the side beam 1 includes a side beam upper cover plate 11, a side beam lower cover plate 12, a connecting bent plate 14 and two side beam vertical plates 13; the side beam upper cover plate 11 and the side beam lower cover plate 12 are arranged opposite to each other in the vertical direction, and the two side beam vertical plates 13 are respectively located between the side beam upper cover plate 11 and the side beam lower cover plate 12, and together form a box structure; at the same time, in order to achieve the connection with the cross beam 2, the side beam upper cover plate 11 The side beam lower cover plate 12 is arranged to protrude from the side beam vertical plate 13 along the lateral inner side and form a receiving interface 15; the cross beam 2 is connected to the receiving interface 15. In order to further improve the connection strength between the side beam and the cross beam 2, a connecting bent plate 14 is arranged in the receiving interface 15. The connecting bent plate 14 is inserted into the receiving interface 15 along the longitudinal direction, and the upper and lower ends are respectively welded to the side beam upper cover plate 11 and the side beam lower cover plate 12. The longitudinal ends of the connecting bent plate 14 are respectively bent to one side of the side beam vertical plate 13 in the receiving interface 15 and welded to the side beam vertical plate 13; it can be understood that in order to improve the connection strength, the longitudinal ends of the connecting bent plate 14 extend to the bending part where the side beam is connected to the cross beam 2, increasing the stress that can be tolerated at this part and increasing the safety margin. The connecting bent plate 14 is arranged in the receiving interface 15 and spaced from the side beam vertical plate 13 to form a cavity structure, that is, the connecting bent plate 14 and the side beam form a double cavity structure, which improves the longitudinal stiffness of the side beam and increases the strength of the connection between the side beam and the cross beam 2.

[0047] The crossbeam 2 includes: a crossbeam upper cover plate 21, a crossbeam lower cover plate 22 and two crossbeam upright plates 23; the crossbeam 2 is H-shaped, has good bending resistance when subjected to vertical loads, and can effectively resist bending deformation; the crossbeam upright plates 23 of the connecting parts at both ends of the crossbeam 2 are inserted into the receiving interface 15, and are welded to the connecting bent plate 14, the side beam upper cover plate 11 and the side beam lower cover plate 12 of the receiving interface 15; the crossbeam upper cover plate 21 of the connecting part is connected to the side beam upper cover plate 11 of the receiving interface 15, and the crossbeam lower cover plate 22 of the connecting part is connected to the side beam lower cover plate 12 of the receiving interface 15.

[0048] The cross beam is also a box structure, which includes a cross beam upper cover plate 21, a cross beam lower cover plate 22 and two cross beam vertical plates 23. The cross beam upper cover plate 21 and the cross beam lower cover plate 22 are arranged vertically opposite to each other, and the two cross beam vertical plates 23 are located between the transverse upper cover plate and the cross beam lower cover plate 22 to form a box structure; the cross beam vertical plates 23 include a cross beam inner vertical plate arranged close to the transverse center line and a cross beam outer vertical plate arranged away from the transverse center line; the cross beam is H-shaped, and the connection parts at both ends are inclined toward the transverse center line. The two sides of the frame are brought closer together, and at the same time, the crossbeam vertical plate 23 of the connecting part is inserted into the receiving interface 15, and is welded with the side beam upper cover plate 11, the side beam lower cover plate 12 and the connecting bent plate 14 in the receiving interface 15 to form a stable box body; specifically, the crossbeam upper cover plate 21 is connected to the side beam upper cover plate 11, the transverse lower cover plate is welded to the side beam lower cover plate 12, and the bent plate is assembled and welded after the welding of the internal welds at the joints of the transverse and side beams is completed, so as to ensure the weld quality and weld connection strength at the connection of the beam frame.

[0049] In the present application, the side beam upper cover plate 11 and the side beam lower cover plate 12 protrude the side beam upright plate 13 along the lateral inner side and form a receiving interface 15. The receiving interface 15 is provided with a connecting bent plate 14, and is respectively connected to the side beam upper cover plate 11, the side beam lower cover plate 12 and the side beam upright plate 13. At the same time, the connecting bent plate 14 is laterally spaced with the side beam upright plate 13 to form a double inner cavity structure with the side beam, thereby improving the longitudinal stiffness of the side beam, and at the same time improving the strength of the connecting part of the side beam and the cross beam, so that it can adapt to the high-speed operation requirements and improve the safety of the frame.

[0050] In this embodiment, the connection parts at both ends of the beam also include a frame upper cover plate 24, which is located above the beam vertical plate 23, and one lateral end of the frame upper cover plate 24 is connected to the beam upper cover plate 21, and the other lateral end of the frame upper cover is connected to the side beam upper cover plate 11 of the receiving interface 15.

[0051] The frame upper cover plate 24 is used for butt welding between the side beam upper cover plate 11 and the cross beam upper cover plate 21, and the frame upper cover plate 24 is welded to the cross beam vertical plate 23, and the side beam upper cover plate 11 and the cross beam upper cover plate 21 are connected to realize the connection between the cross beam and the side beam of the frame; the frame upper cover plate 24 can be used to weld the inner side of the inner and outer vertical plates of the cross beam and the inner side of the box body of the connecting part of the cross and side beams, ensuring that the welds on both sides of the connecting part can be welded. The force generated by the bending and twisting of the frame side beam relative to the cross beam is not only borne by the welds between the cross beam vertical plate 23 and the side beam vertical plate 13, the butt welds between the cross beam upper and lower cover plates and the side beam upper and lower cover plates, and the side beam upper and lower cover plates, but also by the connecting bent plate 14 and the cross beam vertical plate 23, the welds of the side beam vertical plate 13, the connecting bent plate 14 and the cross beam upper and lower cover plates, the frame upper cover plate 24 and the side beam upper cover plate 11, and the frame and the cross beam vertical plate 23, thereby increasing the range of stress to be borne.

[0052] Specifically, each connection part includes two connection sub-parts, and the two connection sub-parts are respectively inclined to their transverse center lines; they can disperse stress to a certain extent, reduce local stress concentration, and thus improve the ability to resist deformation. The two cross beam upright plates 23 of each connection sub-part are inserted into the receiving interface 15 and welded to the side beam; the cross beam upright plates 23 of each connection sub-part are inserted into the receiving interface 15, and are welded to the side beam upper cover plate 11, the side beam lower cover plate 12 and the side beam bent plate to form a stable box.

[0053] Furthermore, the side beam uprights 13 and the side beam upper cover 11 located in the middle of the longitudinal portion are respectively higher than the cross beam uprights 23 and the cross beam upper cover 21 of the connecting portion, and the cross beam uprights 23 of the connecting portion located at the two lateral ends are higher than the cross beam uprights 23 located in the middle of the lateral portion; the frame upper cover 24 is arranged in a straight line obliquely downward from the outside to the inside along the lateral direction, connecting the side beam upper cover 11 located in the middle of the longitudinal portion and the cross beam upper cover 21 of the connecting portion.

[0054] The side beam in the middle of the longitudinal direction is higher than the cross beam. Accordingly, the side beam vertical plate 13 and the side beam upper cover plate 11 included in the side beam are higher than the vertical plate and the cross beam upper cover plate 21 of the cross beam. The cross beam vertical plates 23 at the connecting parts at both ends of the transverse direction are higher than the cross beam vertical plates 23 at the middle of the transverse direction, thereby reducing the height of the cross beam, reducing design redundancy, reducing weight, and realizing lightweight design. At the same time, the frame upper cover plate 24 is used to connect the side beam upper cover plate 11 and the cross beam upper cover plate 21 so that there is no bending transition between the two, and the two plates can be butted at a specified angle, which is more conducive to ultrasonic flaw detection than the arc structure of the steel plate at the butt weld.

[0055] Optionally, the above-mentioned bogie frame also includes a motor hanger assembly 3, including two motor hanger uprights 31 and a motor hanger, the two motor hanger uprights 31 are located on the outer side of the middle part of the beam and are arranged horizontally, any motor hanger is inserted into the upper cover plate 21 of the beam and the lower cover plate 22 of the beam, protruding into the installation notch formed by the beam uprights 23, and respectively welded to the upper cover plate 21 of the beam, the lower cover plate 22 of the beam and the beam uprights 23; the motor hanger is arranged on the surface of the motor hanger uprights 31 away from the beam.

[0056] Two motor hanger stand plates 31 are located on the outer stand plates of the cross beam and arranged in the horizontal direction, and the two are arranged at intervals; the motor hanger is inserted into the cross beam upper cover plate 21, and the cross beam lower cover plate 22 protrudes into the installation notch formed by the cross beam stand plate 23, and the installation notch increases the welding area between the cross beam and the motor hanger, thereby improving the connection strength. At the same time, a first reinforcing rib plate 32 is provided between the two motor hangers, and a second reinforcing rib plate 33 is provided on the transverse outer surface of any motor hanger; the first reinforcing rib plate 32 and the second reinforcing rib plate 33 are respectively welded to the cross beam stand plate 23.

[0057] A first reinforcing rib plate 32 is provided between the two motor hangers to improve the connection strength between the motor hangers; at the same time, a second reinforcing rib plate 33 is provided on the lateral outer surface of the motor hanger to further improve the connection strength between the motor and the crossbeam. The first reinforcing rib plate 32 and the second reinforcing rib plate 33 are respectively welded to the outer vertical plate of the crossbeam to further improve the stability of the structure; the first reinforcing rib plate 32 and the second reinforcing rib plate 33 are respectively set as L-shaped bent plates or arc-shaped plates to increase the contact area and improve the structural rigidity.

[0058] The motor hanger is located on the surface of the motor vertical plate away from the cross beam, preferably a horizontal plane, and a mounting hole is provided on the horizontal plane to realize the installation of the motor, specifically, it is fixed by bolts; a step structure 34 is provided on it to form a bolt braking gear for preventing the bolts from loosening; compared with the box-type motor hanger, this structure of the motor hanger does not need to pre-weld the motor hanger box and then weld it with the cross beam, and it is directly contacted and welded with the upper and lower cover plates of the cross beam and the outer vertical plate of the cross beam, and the assembly process is simpler. Optionally, the motor hanger assembly 3 is a forging part, which has a simple shape and is easy to produce.

[0059] Furthermore, it also includes a brake hanger assembly 4, which is located at the end of the side beam and inserted into the installation notch formed by the side beam upper cover plate 11 and the two side beam upright plates 13, and is welded to the side beam upper cover plate 11, the cap barrel upper cover plate and the side beam upright plates 13 respectively. The brake hanger assembly 4 is located at the end of the side beam, the inner side of the cap barrel, and the side beam upper cover plate 11 and the two side beam upright plates 13 form an installation notch. The brake hanging assembly is located in the installation notch and is welded to the side beam upper cover plate 11, the cap barrel upper cover plate and the side beam upright plates 13. The brake hanging assembly is an integral casting to reduce the number of welds of the brake hanging assembly. Optionally, the brake hanging assembly 4 includes a tread cleaner mounting seat and a brake device mounting seat.

[0060] In another embodiment, a swivel arm positioning seat 5 is further included, which is located between the middle and end parts of the lower cover plate 12 of the side beam. The swivel arm positioning seat 5 includes two parallel clamp seats with grooves at the bottom, and a steamed bun-shaped mounting hole 51 for installing threaded fasteners is provided above the groove. The nut is installed by setting the steamed bun-shaped mounting hole 51, which is more convenient for operation and maintenance than the blind hole mounting hole of the swivel arm positioning seat 5. If the thread is damaged, the nut or bolt can be directly replaced without expanding the hole or inserting a threaded sleeve on the swivel arm positioning seat 5, thereby ensuring the structural strength of the swivel arm positioning seat 5 and simplifying the maintenance steps.

[0061] The connection method of the crossbeam and the side beam of the present application can improve the strength of the frame and reduce the difficulty of manufacturing; at the same time, the technical solution of changing the blind hole of the mounting seat into a through hole, the consideration design of the torque wrench's activity space, and the structural design of the mounting seat with its own bolt stop surface can protect and improve the vehicle's operating safety and vehicle maintenance costs.

[0062] Based on the bogie frame provided in the above embodiments, the present application also provides a bogie, which includes any one of the bogie frames in the above embodiments. Since the bogie adopts the bogie frame in the above embodiments, please refer to the above embodiments for the beneficial effects of the bogie.

[0063] The present application also provides a rail vehicle, comprising the bogie described in the above embodiment.

[0064] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. 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 present application.

[0065] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A bogie frame, comprising two side beams and a cross beam located between the two side beams, wherein both the side beams and the cross beam are box beam structures, characterized in that: The side beam comprises: a side beam upper cover plate, a side beam lower cover plate and two side beam vertical plates, wherein the side beam upper cover plate and the side beam lower cover plate protrude from the side beam vertical plates along the lateral inner side to form a receiving interface; A connecting bent plate is inserted into the receiving interface in the longitudinal direction and is respectively welded to the upper cover plate of the side beam and the lower cover plate of the side beam; the longitudinal ends of the connecting bent plate are respectively connected to the side beam upright plates in the receiving interface, and the connecting bent plate is spaced apart from the side beam upright plates in the transverse direction to form an inner cavity with the side beam; The crossbeam includes: a crossbeam upper cover plate, a crossbeam lower cover plate and two crossbeam upright plates; the crossbeam is H-shaped, and the crossbeam upright plates of the connecting parts at both ends of the crossbeam are inserted into the receiving interface and welded to the connecting bent plate of the receiving interface, the side beam upper cover plate and the side beam lower cover plate; the crossbeam upper cover plate of the connecting part is connected to the side beam upper cover plate of the receiving interface, and the crossbeam lower cover plate of the connecting part is butt-jointed with the side beam lower cover plate of the receiving interface.

2. The bogie frame according to claim 1, characterized in that: The connecting parts at both ends of the beam also include a frame upper cover plate, which is located above the beam vertical plate, one lateral end of the frame upper cover plate is connected to the beam upper cover plate, and the other lateral end of the frame upper cover is connected to the side beam upper cover plate of the receiving interface.

3. The bogie frame according to claim 2, characterized in that: Each of the connecting parts comprises two connecting sub-parts, and the two connecting sub-parts are respectively inclined toward the transverse center line thereof; The two cross beam uprights of each connecting section are inserted into the receiving interface and welded to the side beam.

4. The bogie frame according to claim 2, characterized in that: The side beam upright plate and the side beam upper cover plate located in the middle of the longitudinal direction are respectively higher than the cross beam upright plate and the cross beam upper cover plate of the connecting part, and the cross beam upright plates of the connecting part located at the two ends in the transverse direction are higher than the cross beam upright plate located in the middle of the transverse direction; the frame upper cover plate is arranged in a straight line from the outside to the inside in the transverse direction and connects the side beam upper cover plate located in the middle of the longitudinal direction and the cross beam upper cover plate of the connecting part.

5. The bogie frame according to claim 1, characterized in that: Also includes: A motor hanger assembly, comprising two motor hanger uprights and a motor hanger, wherein the two motor hanger uprights are located outside the middle of the beam and arranged in the transverse direction, and any one of the motor hangers is plugged into the upper cover plate of the beam, and the lower cover plate of the beam protrudes into the installation notch formed by the uprights of the beam, and is respectively welded to the upper cover plate of the beam, the lower cover plate of the beam and the uprights of the beam; The motor hanger is arranged on the surface of the motor hanger stand facing away from the cross beam.

6. The bogie frame according to claim 5, characterized in that: A first reinforcing rib plate is provided between the two motor hangers, and a second reinforcing rib plate is provided on the transverse outer surface of any motor hanger; the first reinforcing rib plate and the second reinforcing rib plate are respectively welded to the crossbeam vertical plate.

7. The bogie frame according to claim 5, characterized in that: The motor hanger has a step structure for limiting the position of the threaded fastener.

8. The bogie frame according to claim 1, characterized in that: Also includes: The brake hanger assembly is located at the end of the side beam, plugged into the mounting notch formed by the side beam upper cover plate and the two side beam upright plates, and respectively welded to the side beam upper cover plate, the cap tube upper cover plate and the side beam upright plates.

9. The bogie frame according to claim 1, characterized in that: Also includes: The pivot arm positioning seat is located between the middle and end of the lower cover plate of the side beam. The pivot arm positioning seat includes two parallel clamp seats with grooves below. A bun-shaped mounting hole for installing a threaded fastener is provided above the groove.

10. A bogie, characterized in that: Comprising the bogie frame as described in any one of claims 1-9.

11. A rail vehicle, characterized in that: Includes the bogie described in claim 10.

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