A bogie frame, bogie and rail vehicle

Abstract

This application provides a bogie frame, a bogie, and a rail vehicle. The upper and lower cover plates of the side beams of the bogie frame protrude from the side beam uprights along the transverse inner side and form a receiving interface. The receiving interface is provided with a connecting bend plate, which is connected to the upper cover plate, the lower cover plate, and the side beam uprights respectively. At the same time, the transverse side of the connecting bend plate is spaced from the side beam uprights to form a double inner cavity structure with the side beams, thereby improving the longitudinal stiffness of the side beams and the strength of the connection between the side beams and the crossbeams, so as to meet the requirements of high-speed operation and improve the safety of the frame.

Description

Technical Field

[0001] This application relates to the field of bogie technology, specifically to a bogie frame, a bogie, and a rail vehicle. Background Technology

[0002] Suburban railways occupy a crucial bridging position, possessing the ability to interconnect with trunk and intercity railways. Consequently, the demand for and performance requirements of suburban express trains are increasingly stringent. The bogie frame, as the core component of the train, bears the responsibility for ensuring safe train operation.

[0003] The bogie's structural type and performance parameters are designed based on user conditions, clearances, and performance indicators. Modern simulation analysis methods are used to perform necessary static strength and fatigue analyses on important bogie components to optimize parameters.

[0004] The frame structure is primarily "H"-shaped, with the connection between the crossbeams and side beams divided into two types: pipe beam to box-type side beam connection and box-type crossbeam to box-type side beam connection. For example, the bogie frame includes two side beams and one crossbeam, both of which are box-type structures. The upper and lower cover plates of the side beams are connected to the upper and lower cover plates of the crossbeams, and the inner and outer vertical plates of the crossbeams are connected to the inner plates of the side beams. The connection points between the crossbeams and side beams are the main load-bearing areas of the frame. The forces generated by the bending and torsion of the side beams relative to the crossbeams are borne only by the welds between the inner and outer vertical plates of the crossbeams and the inner vertical plates of the side beams, the butt welds between the upper and lower cover plates of the crossbeams and the upper and lower cover plates of the side beams, and the upper and lower cover plates of the side beams themselves. This type of crossbeam-to-side beam connection structure is not strong enough, with significant stress at the arcs of the upper and lower cover plates of the side beams and a small safety margin. Summary of the Invention

[0005] This application provides a bogie frame, bogie, and rail vehicle to solve the problems of insufficient structural strength at the connection between the crossbeam and side beam of the existing frame and the large stress at the arc of the upper and lower cover plates of the side beam.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A bogie frame includes two side beams and a crossbeam located between the two side beams, wherein both the side beams and the crossbeam are box girder structures.

[0008] The side beam includes: a side beam upper cover plate, a side beam lower cover plate, and two side beam upright plates. The side beam upper cover plate and the side beam lower cover plate protrude from the side beam upright plates along the transverse inner side to form a receiving interface.

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

[0010] The crossbeam includes: a top cover plate, a bottom cover plate, and two vertical crossbeam plates; the crossbeam is H-shaped, and the vertical crossbeam plates at the connecting parts at both ends of the crossbeam are inserted into the receiving interface and welded to the connecting bend plate, the top cover plate, and the bottom cover plate of the receiving interface; the top cover plate of the connecting part is connected to the top cover plate of the receiving interface, and the bottom cover plate of the connecting part is connected to the bottom cover plate of the receiving interface.

[0011] Optionally, the connecting portions at both ends of the crossbeam further include a frame cover plate, which is located above the upright plate of the crossbeam. One lateral end of the frame cover plate is connected to the crossbeam cover plate, and the other lateral end of the frame cover plate is connected to the side beam cover plate of the receiving interface.

[0012] Optionally, each of the connecting portions includes two connecting sub-parts, and the two connecting sub-parts are respectively inclined toward their lateral centerline;

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

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

[0015] Optionally, it also includes:

[0016] The motor mounting bracket assembly includes two motor mounting bracket uprights and a motor mounting bracket. The two motor mounting bracket uprights are located on the outer side of the middle part of the crossbeam and are arranged in a transverse direction. Each motor mounting bracket is inserted into the upper cover plate of the crossbeam, and the lower cover plate of the crossbeam protrudes into the mounting notch formed by the uprights of the crossbeam, and is welded to the upper cover plate, the lower cover plate and the uprights of the crossbeam respectively.

[0017] The motor hanger is located on the surface of the motor hanger upright plate opposite to the crossbeam.

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

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

[0020] Optionally, it also includes:

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

[0022] Optionally, it also includes:

[0023] The swing arm positioning seat is located between the middle and the end of the lower cover plate of the side beam. The swing arm positioning seat includes two parallel clamp seats with grooves below. Above the grooves are dome-shaped mounting holes for installing threaded fasteners.

[0024] This application also provides a bogie, including the bogie frame described in any of the above embodiments.

[0025] This application also provides a rail vehicle including the bogie described in the above embodiments.

[0026] Compared with the prior art, the bogie frame, bogie, and rail vehicle provided in this application embodiment have the following technical advantages:

[0027] In this application, the upper and lower cover plates of the side beams protrude from the side beam uprights along the transverse inner side and form a receiving interface. The receiving interface is provided with a connecting bend plate, which is connected to the upper cover plate, the lower cover plate, and the uprights of the side beams respectively. At the same time, the transverse side of the connecting bend plate is spaced from the uprights of the side beams to form a double inner cavity structure with the side beams. This improves the longitudinal stiffness of the side beams and the strength of the connection between the side beams and the crossbeams, making it adaptable to the requirements of high-speed operation and improving the safety of the structure. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a schematic diagram of a steering frame provided in an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the structure of the receiving interface provided in the embodiments of this application;

[0031] Figure 3 A schematic diagram of the installation structure of the connecting bend plate provided in the embodiments of this application;

[0032] Figure 4 This is a schematic diagram of the structure of the motor hanger assembly provided in the embodiments of this application;

[0033] Figure 5 A side view of the motor hanger assembly provided in an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of the structure of the brake hanger assembly provided in the embodiments of this application;

[0035] Figure 7 This is a schematic diagram of the structure of the rotating arm positioning seat provided in the embodiments of this application;

[0036] Figure 8 This is a side view of the rotating arm positioning seat provided in an embodiment of this application.

[0037] The following labels are shown in the attached diagram:

[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 upright plate 13, connecting bend plate 14, and receiving interface 15;

[0040] 21. Upper cover plate of crossbeam; 22. Lower cover plate of crossbeam; 23. Vertical plate of crossbeam; 24. Upper cover plate of frame;

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

[0042] 51. Bun-shaped mounting hole. Detailed Implementation

[0043] This invention discloses a bogie frame, a bogie, and a rail vehicle to solve the problems of insufficient structural strength at the connection between the crossbeam and the side beam in existing frames, and high stress at the arc of the upper and lower cover plates of the side beam.

[0044] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0045] Please see Figure 1-8 , Figure 1This is a schematic diagram of a steering frame provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the receiving interface provided in the embodiments of this application; Figure 3 A schematic diagram of the installation structure of the connecting bend plate provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the motor hanger assembly provided in the embodiments of this application; Figure 5 A side view of the motor hanger assembly provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the brake hanger assembly provided in the embodiments of this application; Figure 7 This is a schematic diagram of the structure of the rotating arm positioning seat provided in the embodiments of this application; Figure 8 This is a side view of the rotating arm positioning seat provided in an embodiment of this application.

[0046] In one specific embodiment, the bogie frame provided in this application includes two side beams 1 and a crossbeam 2 located between the two side beams 1. The two side beams 1 are arranged parallel to each other along the longitudinal direction of the vehicle body, and the two transverse ends of the crossbeam 2 are welded to the corresponding side beams 1 respectively. Both the side beams 1 and the crossbeam 2 are 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 bend plate 14, and two side beam upright plates 13. The side beam upper cover plate 11 and the side beam lower cover plate 12 are arranged vertically opposite each other, and the two side beam upright plates 13 are located between the side beam upper cover plate 11 and the side beam lower cover plate 12 respectively, forming a box structure together. At the same time, in order to achieve the connection with the crossbeam 2, the side beam upper cover plate 11... The lower cover plate 12 of the side beam protrudes laterally from the upright plate 13 of the side beam, forming a receiving interface 15. The crossbeam 2 connects to the receiving interface 15. To further improve the connection strength between the side beam and the crossbeam 2, a connecting bent plate 14 is provided within the receiving interface 15. The connecting bent plate 14 is inserted longitudinally into the receiving interface 15, and its upper and lower ends are welded to the upper cover plate 11 and the lower cover plate 12 of the side beam, respectively. The longitudinal ends of the connecting bent plate 14 are bent toward the upright plate 13 of the side beam within the receiving interface 15 and welded to the upright 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 bend where the side beam and the crossbeam 2 connect, increasing the stress that can be withstood at that point and increasing the safety margin. The connecting bent plate 14, within the receiving interface 15, is spaced apart from the upright plate 13 of the side beam to form a cavity structure, that is, the connecting bent plate 14 and the side beam form a double cavity structure, improving the longitudinal stiffness of the side beam and increasing the strength at the connection between the side beam and the crossbeam 2.

[0047] The crossbeam 2 includes: a crossbeam upper cover plate 21, a crossbeam lower cover plate 22, and two crossbeam vertical plates 23; the crossbeam 2 is H-shaped and has good bending resistance when bearing vertical loads, effectively resisting bending deformation; the crossbeam vertical plates 23 at both ends of the crossbeam 2 are inserted into the receiving interface 15 and welded to the connecting bend 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 crossbeam is also a box structure, comprising an upper cover plate 21, a lower cover plate 22, and two vertical plates 23. The upper cover plate 21 and the lower cover plate 22 are arranged vertically opposite each other, and the two vertical plates 23 are located between the upper cover plate and the lower cover plate 22, forming a box structure. The vertical plates 23 include an inner vertical plate located near the transverse centerline and an outer vertical plate located away from the transverse centerline. The crossbeam is H-shaped, with the connecting parts at both ends inclined towards the transverse centerline. The beams move closer together, and the horizontal beam plate 23 of the connecting part is inserted into the receiving interface 15 and welded to the side beam upper cover plate 11, side beam lower cover plate 12 and connecting bend plate 14 in the receiving interface 15 to form a stable box; specifically, the horizontal beam upper cover plate 21 is connected to the side beam upper cover plate 11, the horizontal lower cover plate is welded to the side beam lower cover plate 12, and the bend plate is assembled and welded after the internal weld of the horizontal and side beams is completed, to ensure the weld quality and weld connection strength at the beam frame connection.

[0049] In this application, the upper cover plate 11 and the lower cover plate 12 of the side beam protrude from the inner side of the side beam upright plate 13 along the transverse direction and form a receiving interface 15. The receiving interface 15 is provided with a connecting bend plate 14, which is connected to the upper cover plate 11, the lower cover plate 12 and the upright plate 13 of the side beam respectively. At the same time, the transverse direction of the connecting bend plate 14 is spaced from the upright plate 13 of the side beam to form a double inner cavity structure with the side beam, thereby improving the longitudinal stiffness of the side beam and the strength of the connection between the side beam and the crossbeam, so as to adapt to the requirements of high-speed operation and improve the safety of the structure.

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

[0051] The side beam top cover plate 11 and the cross beam top cover plate 21 are butt-welded together using the frame top cover plate 24. The frame top cover plate 24 is welded to the cross beam vertical plate 23 and connects the side beam top cover plate 11 and the cross beam top cover plate 21, thus connecting the cross beam and the side beam of the frame. The frame top cover plate 24 can be used to weld the inner side of the cross beam's inner and outer vertical plates to the inner side of the box body of the connection part of the cross beam and the side beam, ensuring that the welds on both sides of the connection 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 weld between the cross beam vertical plate 23 and the side beam vertical plate 13, the butt weld between the cross beam top cover plate and the side beam top cover plate, and the side beam top cover plate, but also by the weld between the connecting bending plate 14 and the cross beam vertical plate 23, the weld between the side beam vertical plate 13, the connecting bending plate 14 and the cross beam top cover plate, the frame top cover plate 24 and the side beam top cover plate 11, and the frame and the cross beam vertical plate 23, thereby increasing the stress range that can be borne.

[0052] Specifically, each connection part includes two connection sections, which are inclined towards their transverse centerlines; this can disperse stress to a certain extent, reduce local stress concentration, and thus improve the resistance to deformation. The two horizontal beam uprights 23 of each connection section are inserted into the receiving interface 15 and welded to the side beam; the horizontal beam uprights 23 of each connection section are inserted into the receiving interface 15 and welded to the upper cover plate 11, the lower cover plate 12, and the side beam bending plate to form a stable box.

[0053] Furthermore, the side beam upright plate 13 and the side beam top cover plate 11 located in the longitudinal middle are higher than the cross beam upright plate 23 and the cross beam top cover plate 21 of the connecting part, respectively. The cross beam upright plate 23 located at both ends of the transverse direction is higher than the cross beam upright plate 23 located in the transverse middle. The frame top cover plate 24 is arranged in a straight line from the outside to the inside in the transverse direction, connecting the side beam top cover plate 11 located in the longitudinal middle and the cross beam top cover plate 21 of the connecting part.

[0054] The longitudinally positioned side beams are higher than the transverse beams. Correspondingly, the side beam uprights 13 and the side beam top cover 11 are higher than the transverse beam uprights and transverse beam top cover 21. The transverse beam uprights 23 at the connecting parts at both transverse ends are higher than the transverse beam uprights 23 at the transverse middle. This reduces the transverse beam height, lowers design redundancy, reduces weight, and achieves lightweight design. Simultaneously, the frame top cover 24 connects the side beam top cover 11 and the transverse beam top cover 21, allowing for a seamless transition between them and enabling butt joints between the two plates at a specified angle. Compared to the arc structure of the steel plates at the butt weld, this is more conducive to ultrasonic testing.

[0055] Optionally, the aforementioned bogie frame also includes a motor mount assembly 3, comprising two motor mount uprights 31 and a motor mount. The two motor mount uprights 31 are located on the outer side of the middle of the crossbeam and are arranged laterally. Any motor mount is inserted into the upper cover plate 21 of the crossbeam and the lower cover plate 22 of the crossbeam protrudes into the mounting notch formed by the uprights 23 of the crossbeam, and is welded to the upper cover plate 21, the lower cover plate 22 and the uprights 23 of the crossbeam respectively. The motor mount is located on the surface of the motor mount upright 31 away from the crossbeam.

[0056] Two motor mounting brackets 31 are located on the outer vertical plate of the crossbeam and arranged laterally, with intervals between them. The motor mounting brackets are inserted into the upper cover plate 21 of the crossbeam, and the lower cover plate 22 of the crossbeam protrudes into the mounting notch formed by the vertical plate 23 of the crossbeam. The mounting notch increases the welding area between the crossbeam and the motor mounting brackets, thereby improving the connection strength. At the same time, a first reinforcing rib plate 32 is provided between the two motor mounting brackets, and a second reinforcing rib plate 33 is provided on the transverse outer surface of each motor mounting bracket. The first reinforcing rib plate 32 and the second reinforcing rib plate 33 are respectively welded to the vertical plate 23 of the crossbeam.

[0057] A first reinforcing rib plate 32 is provided between the two motor mounting brackets to improve the connection strength between the motors; at the same time, a second reinforcing rib plate 33 is provided on the transverse outer surface of the motor mounting bracket 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 curved plates or arc-shaped plates to increase the contact area and improve the structural rigidity.

[0058] The motor mount is located on the surface of the motor upright plate opposite to the crossbeam, preferably on a horizontal plane. Mounting holes are provided on this horizontal plane for motor installation, specifically for bolt fixing. A stepped structure 34 is provided on the mount to form a bolt braking stop, preventing bolt loosening. Compared to box-type motor mounts, this structure eliminates the need for pre-welding the motor mount housing to the crossbeam; it directly contacts and welds to the upper and lower cover plates and the outer upright plate of the crossbeam, simplifying the assembly process. Optionally, the motor mount assembly 3 is a forged part, with a simple shape and convenient production.

[0059] Furthermore, it also includes a brake hanger assembly 4, located at the end of the side beam, and inserted into the mounting notch formed by the side beam upper cover plate 11 and the two side beam upright plates 13, and welded to the side beam upper cover plate 11, the cap cover plate, and the side beam upright plates 13 respectively. The brake hanger assembly 4 is located at the end of the side beam, inside the cap, with the side beam upper cover plate 11 and the two side beam upright plates 13 forming the mounting notch. The brake hanger assembly is located within this mounting notch and welded to the side beam upper cover plate 11, the cap cover plate, and the side beam upright plates 13. The brake hanger assembly is an integral casting, reducing the number of welds in the brake hanger assembly. Optionally, the brake hanger assembly 4 includes a tread sweeper mounting seat and a brake device mounting seat.

[0060] In another embodiment, a swing arm positioning seat 5 is also included, located between the middle and the end of the side beam lower cover plate 12. The swing arm positioning seat 5 includes two parallel clamp seats with grooves on the bottom. A dome-shaped mounting hole 51 for installing threaded fasteners is provided above the groove. By setting the dome-shaped mounting hole 51 to install nuts, compared with the blind hole type mounting hole of the swing arm positioning seat 5, it is easier to operate and maintain. If the thread is damaged, the nut or bolt can be directly replaced without enlarging the hole or inserting the threaded sleeve on the swing arm positioning seat 5, which ensures the structural strength of the swing arm positioning seat 5 and simplifies the maintenance steps.

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

[0062] Based on the bogie frame provided in the above embodiments, this 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, the beneficial effects of the bogie can be found in the above embodiments.

[0063] This application also provides a rail vehicle including the bogie described in the above embodiments.

[0064] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0065] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

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

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

3. The steering frame according to claim 2, characterized in that, Each of the connecting parts includes two connecting portions, which are obliquely approaching their respective transverse center lines; The two crossbeam uprights of each of the connecting sections 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 top cover plate located in the longitudinal middle are respectively higher than the cross beam upright plate and the cross beam top cover plate of the connecting part. The cross beam upright plate of the connecting part located at both ends in the transverse direction is higher than the cross beam upright plate located in the transverse middle. The frame top cover plate is arranged in a straight line from the outside to the inside in the transverse direction, connecting the side beam top cover plate located in the longitudinal middle and the cross beam top cover plate of the connecting part.

5. The bogie frame according to claim 1, characterized in that, Also includes: The motor mounting bracket assembly includes two motor mounting bracket uprights and a motor mounting bracket. The two motor mounting bracket uprights are located on the outer side of the middle part of the crossbeam and are arranged in a transverse direction. Each motor mounting bracket is inserted into the upper cover plate of the crossbeam, and the lower cover plate of the crossbeam protrudes into the mounting notch formed by the uprights of the crossbeam, and is welded to the upper cover plate, the lower cover plate and the uprights of the crossbeam respectively. The motor hanger is located on the surface of the motor hanger upright plate opposite to the crossbeam.

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

7. The bogie frame according to claim 5, characterized in that, The motor hanger has a stepped structure for limiting the threaded fasteners.

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 and is inserted into the mounting notch formed by the upper cover plate of the side beam and the two upright plates of the side beam, and is welded to the upper cover plate of the side beam, the upper cover plate of the cap and the upright plates of the side beam respectively.

9. The bogie frame according to claim 1, characterized in that, Also includes: The swing arm positioning seat is located between the middle and the end of the lower cover plate of the side beam. The swing arm positioning seat includes two parallel clamp seats with grooves below. Above the grooves are dome-shaped mounting holes for installing threaded fasteners.

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

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

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