Bogie and heavy axle load locomotive

Abstract

The invention relates to the technical field of locomotives, in particular to a bogie and a large-axle-load locomotive. The bogie comprises a framework, a driving device, a wheel pair and a traction device, the framework comprises a box girder frame structure, and the box girder frame structure comprises a traction beam; the driving device comprises a direct-drive motor, a first suspension structure, a second suspension structure and a third suspension structure, one end of the first suspension structure and one end of the second suspension structure are both connected to one side of a shell of the direct-drive motor, one end of the third suspension structure is connected to the other side of the shell of the direct-drive motor, and the wheel pair comprises an axle and wheels. The axle is connected with the direct drive motor; the traction device comprises a traction rod, one end of the traction rod is installed on the traction beam, the other end of the traction rod is connected with the locomotive body, and the traction rod and the horizontal plane are arranged in an included angle mode so that the vertical distance between the intersection point of the extension line of the traction rod and the center line of the framework and the rail face can be reduced, and the purpose of smaller axle load transfer of the whole locomotive is achieved. And the operation safety of the locomotive is higher.

Description

Technical Field

[0001] The present disclosure relates to the technical field of locomotives, and in particular to a bogie and a locomotive with a large axle load. Background Art

[0002] At present, the domestic rail transit industry and related scientific research institutions have begun to conduct relevant technical research on direct drive bogies and locomotives. However, with the vigorous development of rail transit transportation and the increase in transportation demand, the existing direct drive bogies still cannot meet the needs of large axle load locomotives, and are prone to the risk of large axle load transfer and reduced safety. Summary of the invention

[0003] The purpose of the present disclosure is to provide a bogie and a large-axle-weight locomotive to improve the safety of the operation of the large-axle-weight locomotive.

[0004] Based on the above objectives, the present disclosure provides a bogie, comprising:

[0005] A frame, the frame comprising a box beam frame structure, the box beam frame structure comprising a traction beam;

[0006] A driving device, the driving device comprising a direct drive motor, a first suspension structure, a second suspension structure and a third suspension structure, one end of the first suspension structure and one end of the second suspension structure are both connected to one side of the housing of the direct drive motor, one end of the third suspension structure is connected to the other side of the housing of the direct drive motor, and the other ends of the first suspension structure, the second suspension structure and the third suspension structure are respectively connected to three non-collinear installation positions on the box beam frame structure;

[0007] A wheelset, the wheelset being mounted on the frame, the wheelset comprising an axle and a wheel, the axle being connected to an output shaft of the direct drive motor, and the wheel being connected to the axle; and

[0008] A traction device, comprising a traction rod, one end of which is mounted on the traction beam, and the other end of which is used to connect with the vehicle body, wherein the traction rod is arranged at an angle to the horizontal plane to reduce the vertical distance between the intersection of the extension line of the traction rod and the center line of the frame and the track surface.

[0009] In one embodiment of the present disclosure, the box beam frame structure further includes an end beam, a first side beam and a second side beam, the end beam is arranged opposite to the traction beam, the first side beam is arranged opposite to the second side beam, and the end beam, the traction beam, the first side beam and the second side beam are connected to form the box beam frame structure;

[0010] The frame further comprises a cross beam, one end of which is connected to the first side beam, and the other end of which is connected to the second side beam.

[0011] In one embodiment of the present disclosure, the number of the drive devices and the number of the wheelsets are both two, and the drive devices are connected to the wheelsets in a one-to-one correspondence, wherein the direct drive motor in one of the drive devices is installed between the end beam and the cross beam through the first suspension structure, the second suspension structure, and the third suspension structure, and the direct drive motor in the other drive device is installed between the traction beam and the cross beam through the first suspension structure, the second suspension structure, and the third suspension structure.

[0012] In one embodiment of the present disclosure, the first suspension structure and the second suspension structure both include a suspension rod, one end of the suspension rod in the driving device installed between the end beam and the cross beam is connected to the housing of the direct drive motor, and the other end is connected to the end beam; one end of the suspension rod in the driving device installed between the traction beam and the cross beam is connected to the housing of the direct drive motor, and the other end is connected to the traction beam;

[0013] The third suspension structure includes a motor mounting plate and a connecting portion, one side of the motor mounting plate is connected to the housing of the direct drive motor, the connecting portion is connected to the side of the motor mounting plate away from the motor, and the connecting portion is connected to the cross beam; a recessed portion is provided on the side of the connecting portion close to the first side beam to form an operating space with the first side beam, and / or a recessed portion is provided on the side of the connecting portion close to the second side beam to form an operating space with the second side beam.

[0014] In one embodiment of the present disclosure, the connecting portion includes a vertical rib plate and a transverse rib plate, the vertical rib plate is vertically connected to the motor mounting plate, and the transverse rib plate is vertically connected to both the mounting plate and the vertical rib plate; the transverse rib plate has at least one straight edge and at least one curved edge, at least one straight edge is connected to the motor mounting plate, and the curved edge is bent toward the straight edge to form the recessed portion; the vertical rib plate is provided with a mounting hole, a rubber joint is provided in the mounting hole, and the rubber joint is connected to the crossbeam.

[0015] In one embodiment of the present disclosure, the driving device further comprises a flexible plate coupling and a protective cover, the flexible plate coupling comprises a hollow shaft, the axle is passed through the hollow shaft, the end face teeth of the flexible plate coupling are connected to the direct drive motor, and the force transmission pin of the coupling is connected to the wheel;

[0016] The protective cover is connected to the direct drive motor, and the protective cover is provided with at least one of a ventilation hole and a functional hole.

[0017] In one embodiment of the present disclosure, the bogie further comprises a primary suspension device, the primary suspension device comprising a first axle box tie rod assembly, a second axle box tie rod assembly and a spring assembly, the first axle box tie rod assembly and the second axle box tie rod assembly being respectively located on both sides of the axle;

[0018] The box beam frame structure is provided with a first axle box tie rod mounting seat and a second axle box tie rod mounting seat, and axle boxes are provided at both ends of the axle; one end of the first axle box tie rod assembly is connected to one side of the axle box, and the other end of the first axle box tie rod assembly is connected to the first axle box tie rod mounting seat; one end of the second axle box tie rod assembly is connected to the other side of the axle box, and the other end of the second axle box tie rod assembly is connected to the axle box tie rod mounting seat; the spring assembly includes at least two springs which are nested with each other and spring seats installed at both ends of the springs.

[0019] In one embodiment of the present disclosure, the bogie further includes a secondary suspension device, the secondary suspension device includes a rubber pile, the rubber pile is installed on a side of the box beam frame structure facing the car body, and the lateral stiffness of the rubber pile is greater than the longitudinal stiffness of the rubber pile.

[0020] In one embodiment of the present disclosure, the traction beam is provided with a sand sprinkling mounting seat and a sand sprinkling mounting plate, the sand sprinkling mounting seat includes a plurality of first special-shaped bent plates, and the plurality of first special-shaped bent plates enclose a cavity; one end of the sand sprinkling mounting seat is welded to the traction beam, and the other end of the sand sprinkling mounting seat is welded to the sand sprinkling mounting plate, wherein the welding area between the sand sprinkling mounting seat and the traction beam is larger than the welding area between the sand sprinkling mounting seat and the sand sprinkling mounting plate.

[0021] In one embodiment of the present disclosure, the end beam is provided with a stone removal mounting seat and a stone removal mounting plate, the stone removal mounting seat includes a plurality of second special-shaped bent plates, and the plurality of second special-shaped bent plates enclose a cavity; one end of the stone removal mounting seat is welded to the traction beam, and the other end of the stone removal mounting seat is welded to the stone removal mounting plate, wherein the welding area between the stone removal mounting seat and the end beam is greater than the welding area between the stone removal mounting seat and the stone removal mounting plate.

[0022] In one embodiment of the present disclosure, the end beam and the traction beam are both provided with a brake mounting seat, and the brake mounting seat on the end beam is symmetrically arranged with the brake mounting seat on the traction beam;

[0023] And / or, both the end beam and the traction beam are provided with a motor vibration absorber mounting seat, and the motor vibration absorber mounting seat on the end beam is symmetrically arranged with the motor vibration absorber mounting seat on the traction beam.

[0024] In one embodiment of the present disclosure, the bogie further comprises a tread cleaning device, wherein the tread cleaning device comprises a grinder, and the grinder is used to repair the tread profile of the wheel according to the running status of the locomotive.

[0025] Based on the above objectives, the present disclosure also provides a large axle load locomotive, including the bogie.

[0026] In one embodiment of the present disclosure, the axle weight of the large axle weight locomotive is greater than or equal to 25 tons, and the power of each axle is greater than or equal to 1200 kilowatts.

[0027] The beneficial effects of the present disclosure are mainly:

[0028] The bogie provided by the present invention adopts a direct-drive motor to drive a wheel pair, one end of the traction rod is connected to the traction beam of the frame, and the other end of the traction rod is connected to the car body. When the car body rotates, the rotation angle of the traction rod is small, and the lateral component of the bogie caused by the rotation angle of the traction rod is also small. Moreover, the traction rod is arranged at an angle with the horizontal plane, which can reduce the vertical distance between the intersection of the extension line of the traction rod and the center line of the frame and the track surface; at the same time, since one end of the first suspension structure and one end of the second suspension structure are both connected to one side of the direct-drive motor housing, and one end of the third suspension structure is connected to the other side of the direct-drive motor housing, the other ends of the first suspension structure, the second suspension structure and the third suspension structure are respectively connected to three non-collinear installation positions on the box beam frame structure, ensuring that the motor torque reaction force is fully applied to the frame without additional axle weight changes, which is conducive to exerting large traction force, and the combined effect of the traction device and the drive device to achieve the purpose of smaller axle weight transfer of the whole vehicle. The bogie is suitable for large axle weight locomotives and has higher locomotive operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the specific embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of the structure of a bogie provided in an embodiment of the present disclosure;

[0031] Figure 2 A schematic diagram of the structure of a frame in a bogie provided in an embodiment of the present disclosure;

[0032] Figure 3 A structural schematic diagram of another perspective of the framework provided in an embodiment of the present disclosure;

[0033] Figure 4 A schematic diagram of the structure of a traction device in a bogie provided in an embodiment of the present disclosure;

[0034] Figure 5 A schematic structural diagram of a wheelset in a bogie provided in an embodiment of the present disclosure;

[0035] Figure 6 A schematic diagram of the structure of a driving device in a bogie provided in an embodiment of the present disclosure;

[0036] Figure 7 It is a schematic diagram of the structure of the frame and the driving device in the embodiment of the present disclosure;

[0037] Figure 8 is a schematic structural diagram of a flexible plate coupling in an embodiment of the present disclosure;

[0038] Fig. 9 It is a schematic structural diagram of a first protective cover in an embodiment of the present disclosure;

[0039] Fig.10 is a schematic structural diagram of a second protective cover in an embodiment of the present disclosure;

[0040] Fig.11 is a structural schematic diagram of a third suspension structure in an embodiment of the present disclosure;

[0041] Fig.12 is a structural schematic diagram of the third suspension structure in the embodiment of the present disclosure from another perspective;

[0042] Fig.13 is a top view of a third suspension structure in an embodiment of the present disclosure;

[0043] Fig.14 An exploded view of a primary suspension device in a bogie provided by an embodiment of the present disclosure;

[0044] Fig.15 An exploded view of a secondary suspension device in a bogie provided by an embodiment of the present disclosure;

[0045] Fig.16 A schematic diagram of the local structure of a bogie provided in an embodiment of the present disclosure Figure 1 ;

[0046] Fig.17 A schematic diagram of the local structure of a bogie provided in an embodiment of the present disclosure Figure 2 ;

[0047] Fig.18 It is a structural schematic diagram of a sand spreading mounting base in an embodiment of the present disclosure;

[0048] Fig.19 It is a structural schematic diagram of the sand spreading mounting base in the embodiment of the present disclosure from another perspective;

[0049] Fig. 20 It is a structural schematic diagram of a stone removal mounting seat in an embodiment of the present disclosure;

[0050] Fig.21 A schematic diagram of the structure of a braking device in a bogie provided in an embodiment of the present disclosure;

[0051] Fig. 22 A schematic structural diagram of a tread cleaning device in a bogie provided in an embodiment of the present disclosure.

[0052] The following are the descriptions of the reference numerals:

[0053] 1-frame; 11-end beam; 111-nodding stopper mounting seat; 112-wheel rim lubrication mounting seat; 113-brake mounting seat; 1141-stone removal mounting seat; 11411-second special-shaped curved plate; 1142-stone removal mounting plate; 115-motor shock absorber mounting seat; 116-first motor mounting seat; 12-first side beam; 13-cross beam; 131-second motor mounting seat; 14-traction beam; 141-traction device mounting seat; 142-sand spreading mounting seat; 1421-first special-shaped curved plate; 143-sand spreading Sand mounting plate; 15-second side beam; 151-shaking stopper; 152-second rubber pile mounting seat; 153-second lateral shock absorber mounting seat; 154-first vertical shock absorber mounting seat; 155-first axle box tie rod mounting seat; 156-second axle box tie rod mounting seat; 2-wheel set; 21-axle; 22-axle box; 23-wheel; 3-drive device; 31-first protective cover; 311-functional hole; 32-suspender rod; 33-motor shock absorber; 34-direct drive motor; 35-second protective cover; 351-ventilation hole ;36-flexible plate coupling;361-hollow shaft;362-force transmission pin;363-face gear;37-third suspension structure;371-motor mounting plate;372-connecting part;3721-vertical rib plate;37211-rubber joint;3722-first transverse rib plate;3723-second transverse rib plate;4-secondary suspension device;41-nodding stopper;42-rubber pile;43-lateral stopper;44-secondary transverse shock absorber;5-tread cleaning device;51-grinding sub;6-traction device;61-rotating Tow frame traction seat; 62-traction rod; 63-vehicle traction seat; 7-primary suspension device; 71a-first axle box tie rod assembly; 71b-second axle box tie rod assembly; 72-spring lower seat; 73-spring assembly; 74-spring upper seat; 75-lifting seat; 76-primary shock absorber; 77-primary connecting seat; 8-wheel rim lubrication device; 81-wheel rim lubrication nozzle; 82-grease tank; 91-stone removal device; 92-sand spreading device; 10-brake device; 101-clamp; 102-brake disc; 20-butt weld. DETAILED DESCRIPTION

[0054] The technical solution of the present disclosure will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0055] In the description of the present disclosure, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0056] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0057] See also Figures 1 to 22 As shown, this embodiment provides a bogie, including a frame 1, a drive device 3, a wheelset 2 and a traction device 6, the frame 1 includes a box beam frame structure, the box beam frame structure includes a traction beam 14; the drive device 3 includes a direct drive motor 34, a first suspension structure, a second suspension structure and a third suspension structure 37, one end of the first suspension structure and one end of the second suspension structure are connected to one side of the housing of the direct drive motor 34, one end of the third suspension structure 37 is connected to the other side of the housing of the direct drive motor 34, the first suspension structure, the second suspension structure and the third suspension structure are connected to the first suspension structure, the second suspension structure and the third suspension structure. The other end of the structure 37 is respectively connected to three non-collinear installation positions on the box beam frame structure; the wheelset 2 is installed on the frame 1, and the wheelset 2 includes an axle 21 and a wheel 23. The axle 21 is connected to the output shaft of the direct drive motor 34, and the wheel 23 is connected to the axle 21; the traction device 6 includes a traction rod 62, one end of the traction rod 62 is installed on the traction beam 14, and the other end of the traction rod 62 is used to connect with the vehicle body. The traction rod 62 is set at an angle with the horizontal plane to reduce the vertical distance between the intersection of the extension line of the traction rod 62 and the center line of the frame 1 and the track surface.

[0058] The bogie provided in this embodiment adopts a direct drive motor 34 to drive the wheelset 2, one end of the traction rod 62 is connected to the traction beam 14 of the frame 1, and the other end of the traction rod 62 is connected to the vehicle body. When the vehicle body rotates, the rotation angle of the traction rod 62 is small, and the lateral component of the bogie caused by the rotation angle of the traction rod 62 is also small. In addition, the traction rod 62 is arranged at an angle with the horizontal plane, which can reduce the vertical distance between the intersection of the extension line of the traction rod 62 and the center line of the frame 1 and the track surface; at the same time, since one end of the first suspension structure and one end of the second suspension structure are both One side of the housing of the direct-drive motor 34 is connected, one end of the third suspension structure 37 is connected to the other side of the housing of the direct-drive motor 34, and the other ends of the first suspension structure, the second suspension structure and the third suspension structure 37 are respectively connected to three non-collinear installation positions on the box beam frame structure, to ensure that the motor torque reaction force is fully applied to the frame 1 without additional axle weight changes, which is conducive to exerting large traction force, and the combined effect of the traction device 6 and the drive device 3 can achieve the purpose of smaller axle weight transfer of the whole vehicle. It is suitable for locomotives with large axle weights and has higher locomotive operation safety.

[0059] Exemplarily, the other end of the traction rod 62 is connected to the vehicle body at the middle of the vehicle body. Specifically, the vehicle body can be divided into the front end, the middle and the rear end according to the length direction. The middle here refers to the middle area relative to the front end and the rear end. The traction beam is provided with a traction device mounting seat 141, and the traction rod 62 is connected to the traction beam through the traction device mounting seat 141. The traction rod 62 is connected to the frame 1 only at the traction beam 14, and the connection part 372 of the traction rod 62 and the vehicle body is located in the middle of the vehicle body. When the vehicle body rotates, the rotation angle of the traction rod 62 is small, the length of the traction rod 62 can be short, and the deflection angle of the traction rod 62 is small. When subjected to longitudinal force, the lateral component force transmitted to the bogie is smaller, the dynamic performance of the whole vehicle is better, the structure is simple, and the space occupied is small. The overall structure is a lead-out type, that is, it is directly led from the traction beam 14 to the vehicle body, and is not interlaced with other structures in space, which is convenient for inspection and disassembly during maintenance.

[0060] See also Figure 4 As shown, the traction device 6 also includes a bogie traction seat 61 and a car body traction seat 63. The bogie traction seat 61 is installed at one end of the traction rod 62, and the car body traction seat 63 is installed at the other end of the traction rod 62. The bogie traction seat 61 is installed and connected to the traction beam 14 of the bogie, and the car body traction seat 63 is connected to the middle part of the car body.

[0061] In one embodiment, see Figure 2As shown, the box girder frame structure further includes end beams 11, first side beams 12, and second side beams 15. The end beams 11 are disposed opposite to the draw beams 14, and the first side beams 12 are disposed opposite to the second side beams 15. The end beams 11, draw beams 14, first side beams 12, and second side beams 15 are connected to form the box girder frame structure. The frame 1 further includes a cross beam 13. One end of the cross beam 13 is connected to the first side beam 12, and the other end of the cross beam 13 is connected to the second side beam 15.

[0062] The overall shape of the frame 1 is in the shape of a Chinese character 'Ri'. The end beams 11, draw beams 14, first side beams 12, and second side beams 15 all adopt reinforced box beam structures and are welded to form the box girder frame structure. One end of the cross beam 13 is welded to the first side beam 12, and the other end of the cross beam 13 is welded to the second side beam 15, meeting the strength requirements of the bogie with large axle load. The main body of the upper surface of the frame 1 is a flat plate structure without bending, which is flat and has good processability.

[0063] See Figure 2 and Figure 3 As shown, a nodding stop mounting seat 111, a wheel flange lubrication mounting seat 112, a brake mounting seat 113, and a stone discharging mounting seat 1141 are provided on the end beam 11. A yawing stop 151, a secondary rubber spring mounting seat 152, a secondary lateral damper mounting seat 153, and a primary vertical damper mounting seat 154 are provided on the first side beam 12 and the second side beam 15.

[0064] In one embodiment, see Figure 1 As shown, the number of both the driving devices 3 and the wheel sets 2 is two. The driving devices 3 are connected to the wheel sets 2 in a one-to-one correspondence. Each driving device 3 drives one wheel set 2. The direct drive motor 34 in one of the driving devices 3 is mounted between the end beam 11 and the cross beam 13 through the first suspension structure, the second suspension structure, and the third suspension structure 37. The direct drive motor 34 in the other driving device 3 is mounted between the draw beam 14 and the cross beam 13 through the first suspension structure, the second suspension structure, and the third suspension structure 37.

[0065] In this embodiment, the direct drive motor 34 in one of the driving devices 3 is connected to the end beam 11 through the first suspension structure and the second suspension structure, and is connected to the cross beam 13 through the third suspension structure 37. The direct drive motor 34 in the other driving device 3 is connected to the draw beam 14 through the first suspension structure and the second suspension structure, and is connected to the cross beam 13 through the third suspension structure 37.

[0066] The direct drive motor 34 is not directly connected to the frame 1, but is connected to the frame 1 through the first suspension structure, the second suspension structure, and the third suspension structure 37, forming a motor suspended structure on the frame, ensuring that all the torque reaction forces of the direct drive motor 34 act on the frame 1, without additional axle load changes, and ensuring the safety of the operation of the locomotive with large axle load.

[0067] In one embodiment, the first suspension structure and the second suspension structure both include a suspension rod 32, one end of the suspension rod 32 in the driving device 3 installed between the end beam 11 and the cross beam 13 is connected to the housing of the direct drive motor 34, and the other end is connected to the end beam 11; one end of the suspension rod 32 in the driving device 3 installed between the traction beam 14 and the cross beam 13 is connected to the housing of the direct drive motor 34, and the other end is connected to the traction beam 14; the third suspension structure 37 includes a motor mounting plate 371 and a connecting portion 372, one side of the motor mounting plate 371 is connected to the housing of the direct drive motor 34, the connecting portion 372 is connected to the side of the motor mounting plate 371 away from the motor, and the connecting portion 372 is connected to the cross beam 13; a recessed portion is provided on the side of the connecting portion 372 close to the first side beam 12 to form an operating space with the first side beam 12, and / or a recessed portion is provided on the side of the connecting portion 372 close to the second side beam 15 to form an operating space with the second side beam 15.

[0068] For example, see Figure 7 As shown, Figure 7 What is shown is the driving device 3 installed between the end beam 11 and the cross beam 13 , and the driving device 3 installed between the traction beam 14 and the cross beam 13 is not shown.

[0069] Figure 7 One end of the suspension rod 32 in the driving device 3 shown in FIG. 3 is connected to the housing of the direct drive motor 34, and the other end of the suspension rod 32 is connected to the end beam 11. Figures 11 to 13 As shown, the third suspension structure 37 includes a motor mounting plate 371 and a connecting portion 372, one side of the motor mounting plate 371 is connected to the housing of the direct drive motor 34, one end of the connecting portion 372 is connected to the side of the motor mounting plate 371 away from the motor, and the other end of the connecting portion 372 is connected to the cross beam 13; a recessed portion is provided on the side of the connecting portion 372 close to the first side beam 12 to form an operating space with the first side beam 12, and a recessed portion is provided on the side of the connecting portion 372 close to the second side beam 15 to form an operating space with the second side beam 15, so that the operator can inspect and maintain the direct drive motor 34 and other components in the operating space.

[0070] It should be noted that the recessed portion may be provided only on the side of the connection portion 372 close to the first side beam 12 , or may be provided only on the side of the connection portion 372 close to the second side beam 15 .

[0071] In some embodiments, see Fig.12As shown, the connecting portion 372 includes a vertical rib plate 3721 and a transverse rib plate, the vertical rib plate 3721 is vertically connected to the motor mounting plate 371, and the transverse rib plate is vertically connected to both the mounting plate and the vertical rib plate 3721; the transverse rib plate has at least one straight edge and at least one curved edge, at least one straight edge is connected to the motor mounting plate 371, and the curved edge is bent toward the straight edge to form a recessed portion; the vertical rib plate 3721 is provided with a mounting hole, a rubber joint 37211 is provided in the mounting hole, and the rubber joint 37211 is connected to the crossbeam 13.

[0072] Exemplarily, the number of vertical ribs 3721 is one, and the transverse ribs include a first transverse rib 3722 and a second transverse rib 3723. The number of first transverse ribs 3722 is two, and the two first transverse ribs 3722 are respectively connected to the upper and lower edges of the vertical rib 3721, and the second transverse rib 3723 is located between the two first transverse ribs 3722. Exemplarily, the first transverse rib 3722 is parallel to the second transverse rib 3723. The number of second transverse ribs 3723 can also be two, and the two second transverse ribs 3723 can be symmetrically arranged on both sides of the vertical rib 3721; the second transverse rib 3723 has two mutually perpendicular straight edges and one curved edge, and the two mutually perpendicular straight edges are respectively connected to the motor mounting plate 371 and the plate surface of the vertical rib 3721. The first transverse rib plate 3722 has a straight side and two curved sides, the straight side is connected to the plate surface of the motor mounting plate 371, the two curved sides are substantially symmetrical about the plate surface of the vertical rib plate 3721, and both curved sides are bent toward the straight side. The vertical rib plate 3721 is provided with a mounting hole, the axis of the mounting hole is substantially perpendicular to the plate surface of the vertical rib plate 3721, and a rubber joint 37211 is provided in the mounting hole, and the rubber joint 37211 is connected to the crossbeam 13.

[0073] In this embodiment, see Figure 1 As shown, the end beam 11 is provided with a first motor mounting seat 116 , and the first motor mounting seat 116 is connected to the suspension rod 32 ; the cross beam 13 is provided with a second motor mounting seat 131 , and the second motor mounting seat 131 is connected to the rubber joint 37211 .

[0074] See also Fig.13 As shown, the third suspension structure 37 in this embodiment is a lightweight triangular-like structure, which not only meets the overall structural strength, but also leaves an operating space for the operator to perform inspection and maintenance operations, such as the area within the dotted line.

[0075] In one embodiment, the driving device 3 also includes a motor shock absorber 33, one end of the motor shock absorber 33 is connected to the direct drive motor 34, and the other end is connected to the frame 1. Exemplarily, the end beam 11 and the traction beam 14 are both provided with a motor shock absorber mounting seat 115, and the motor shock absorber mounting seat 115 on the end beam 11 and the motor shock absorber mounting seat 115 on the traction beam 14 are arranged symmetrically.

[0076] In one embodiment, see Figure 6 Shown and Figure 8 As shown, the drive device 3 also includes a flexible plate coupling 36 and a protective cover. The flexible plate coupling 36 includes a hollow shaft 361. The axle 21 is passed through the hollow shaft 361. The end face teeth 363 of the flexible plate coupling 36 are connected to the direct drive motor 34. The force transmission pin 362 of the coupling is connected to the wheel 23. The protective cover is connected to the direct drive motor 34, and the protective cover is provided with at least one of the ventilation holes 351 and the functional holes 311.

[0077] The flexible plate coupling 36 also includes a force transmission disc, a first flexible plate, a transmission disc, a second flexible plate and a force transmission pin. The first end of the hollow shaft is connected to the first connection part, the second end of the hollow shaft is connected to the second connection part, and both ends of the axle 21 are connected to wheels 23. The wheel 23 close to the second end of the hollow shaft is the driving wheel, and the wheel 23 close to the first end of the hollow shaft is the driven wheel. The force transmission disc and the first flexible plate are sleeved on the outside of the hollow shaft and arranged close to the first end. The first flexible plate is located between the force transmission disc and the first connection part. The force transmission disc is fixedly connected to the output shaft of the direct drive motor 34, and the transmission disc is connected to The second connecting part is fixedly connected, the second flexible plate is fixedly connected to the transmission disc, and the second flexible plate is connected to the driving wheel through the force transmission pin; the output shaft of the direct drive motor is connected to the flexible plate coupling 36, and the flexible plate coupling 36 is connected to the driving wheel, and the driving wheel and the driven wheel are respectively installed at both ends of the axle, that is, the output shaft of the direct drive motor in this embodiment is indirectly connected to the axle; the power of the direct drive motor 34 is transmitted to the force transmission disc, the first flexible plate, the hollow shaft, the transmission disc, the second flexible plate, the force transmission pin, the driving wheel and the driven wheel through the output shaft in sequence, thereby driving the wheelset 2 to rotate.

[0078] The direct drive motor 34 in this embodiment is a permanent magnet direct drive motor.

[0079] See also Figure 6 As shown, a protective cover is installed at each end of the motor through a fastener, which can be a bolt. A plurality of bolt mounting holes 312 are arranged around the protective cover. The two protective covers wrap the two ends of the flexible plate coupling 36 to prevent the impact of sand and stone on the coupling. The protective cover away from the force transmission pin is named the first protective cover 31, and the protective cover close to the force transmission pin is named the second protective cover 35. The structures of the first protective cover 31 and the second protective cover 35 are not completely the same. For example, see Fig.10As shown, the second protective cover 35 is provided with a plurality of ventilation holes 351, and the first protective cover 31 is provided with a functional hole 311 for wiring and oiling. The material of the protective cover can be carbon fiber, aluminum alloy or stainless steel. The protective cover is an integral structure, and both protective covers have a clamp space opening.

[0080] By providing a protective cover, the ventilation requirement of the motor can be guaranteed and the impact of sand and gravel on the flexible plate coupling 36 can be prevented.

[0081] The flexible plate coupling 36 , the motor damper 33 , the first suspension structure, the second suspension structure and the third suspension structure 37 in this embodiment all have a vibration reduction effect on the direct drive motor 34 .

[0082] The drive device 3 in this embodiment not only has the performance of transmitting high-power torque, but also has the motor displacement compensation function and the motor vibration reduction function. The efficiency of the permanent magnet direct drive motor is higher than that of the asynchronous motor. The torque of the permanent magnet direct drive motor is directly transmitted to the wheel 23 through the flexible plate coupling 36. Compared with the traditional gear transmission structure, the transmission efficiency can be improved by about 2%, and there is no need to regularly add grease and recycle gear oil. It is green and environmentally friendly with low maintenance costs. In addition, the direct drive structure has no wear parts and aging parts, which reduces the frequency of inspection and maintenance.

[0083] It should be understood that the connection relationship between the various components in the flexible plate coupling 36 and the working principle of the flexible plate coupling 36 should be understandable to those skilled in the art, and are well known and easy to implement for those skilled in the art, so this embodiment will not be described in detail.

[0084] In one embodiment, see Fig.14 As shown, the bogie also includes a first-stage suspension device 7, which includes a first axle box tie rod assembly 71a, a second axle box tie rod assembly 71b and a spring assembly 73, the first axle box tie rod assembly 71a and the second axle box tie rod assembly 71b are respectively located on both sides of the axle 21; the box beam frame structure is provided with a first axle box tie rod mounting seat 155 and a second axle box tie rod mounting seat 156, and axle boxes 22 are provided at both ends of the axle 21; one end of the first axle box tie rod assembly 71a is connected to one side of the axle box 22, and the other end of the first axle box tie rod assembly 71a is connected to the first axle box tie rod mounting seat 155; one end of the second axle box tie rod assembly 71b is connected to the other side of the axle box 22, and the other end of the second axle box tie rod assembly 71b is connected to the second axle box tie rod mounting seat 156; the spring assembly 73 includes at least two springs which are mutually nested and spring seats installed at both ends of the springs.

[0085] Exemplarily, the first side beam 12 and the second side beam 15 are both equipped with a first axle box tie rod mounting seat 155 and a second axle box tie rod mounting seat 156. The first axle box tie rod mounting seat 155 and the second axle box tie rod mounting seat 156 are both castings, and the second motor mounting seat 131 is also a casting. All load-bearing castings use butt welds 20, and the weld strength and welding processability are better.

[0086] In this embodiment, the spring assembly 73 in the primary suspension device 7 is a spring assembly structure, and the spring assembly 73 includes two mutually nested springs and a spring upper seat 74 and an elastic lower seat installed at both ends of the spring, so that the spring has a large deformation capacity in a small space. Of course, the spring assembly 73 can also include three sequentially nested springs.

[0087] The first axle box tie rod assembly 71a and the second axle box tie rod assembly 71b are respectively located on both sides of the axle 21, one end of the first axle box tie rod assembly 71a is connected to one side of the axle box 22, and the other end of the first axle box tie rod assembly 71a is connected to the first axle box tie rod mounting seat 155; one end of the second axle box tie rod assembly 71b is connected to the other side of the axle box 22, and the other end of the second axle box tie rod assembly 71b is connected to the axle box 22 tie rod mounting seat. Compared with the existing axle box 22 tie rod, the design of this double axle box 22 tie rod assembly has a significantly reduced length, which can enhance the overall lateral stiffness of the primary suspension device 7 and meet the requirements of large axle weight locomotives for the primary lateral stiffness.

[0088] Taking into account that the flexible plate coupling 36 is restricted by the spatial structure of the wheel 23, axle 21, motor, clamp 101 and frame 1, and its achievable vertical displacement capacity is limited, the vertical dynamic displacement limit of the primary suspension device 7 is designed to be smaller than the vertical displacement capacity of the flexible plate coupling 36, to ensure that the flexible plate coupling 36 is not damaged when the locomotive is running.

[0089] See also Fig.14 As shown, the primary suspension device 7 also includes a lifting seat 75, a primary shock absorber 76 and a primary connecting seat 77. The structures and connection relationship of the lifting seat 75, the primary shock absorber 76 and the primary connecting seat 77 are well known to those skilled in the art and will not be described in detail here.

[0090] In one embodiment, see Fig.15 As shown, the bogie also includes a secondary suspension device 4, which includes a rubber pile 42. The rubber pile 42 is installed on the side of the box beam frame structure facing the car body, and the lateral stiffness of the rubber pile 42 is greater than the longitudinal stiffness of the rubber pile 42.

[0091] By adopting the parameter matching design method, the secondary suspension device 4 adopts a rubber pile 42 structure, and the lateral stiffness of the secondary system can be improved to enhance the ability of the bogie to self-stabilize the coupler. At this time, the primary suspension device 7 adopts a steel spring structure, which can ensure better dynamic performance of the whole vehicle. At the same time, during the design, the steel spring has a relatively large static deformation, which enhances the vibration reduction effect of the whole vehicle.

[0092] In this embodiment, the lateral stiffness of the rubber pile 42 is greater than the longitudinal stiffness of the rubber pile 42. The larger lateral stiffness can further enhance the ability of the bogie to self-stabilize the coupler, and the smaller longitudinal stiffness ensures that the bogie's turning resistance coefficient is smaller, thereby making the large axle weight locomotive better able to pass through curves.

[0093] In some embodiments, see Fig.15 As shown, the secondary suspension device 4 further includes a nodal stop 41 , a lateral stop 43 and a secondary lateral shock absorber 44 .

[0094] In one embodiment, see Fig.17 As shown, the bogie also includes a sand spreading device 92; see Figure 3 , Fig.18 and Fig.19 As shown, the traction beam 14 is provided with a sand sprinkling mounting seat 142 and a sand sprinkling mounting plate 143, the sand sprinkling mounting seat 142 includes a plurality of first special-shaped bent plates 1421, and the plurality of first special-shaped bent plates 1421 enclose a cavity; one end of the sand sprinkling mounting seat 142 is welded to the traction beam 14, and the other end of the sand sprinkling mounting seat 142 is welded to the sand sprinkling mounting plate 143, and the sand sprinkling device 92 is installed on the sand sprinkling mounting plate 143; wherein, the welding area between the sand sprinkling mounting seat 142 and the traction beam 14 is larger than the welding area between the sand sprinkling mounting seat 142 and the sand sprinkling mounting plate 143.

[0095] A cavity is formed by enclosing a plurality of first special-shaped bent plates 1421, and the areas of the two end faces of the sand-sprinkling mounting seat 142 are different. The end face area of ​​the sand-sprinkling mounting seat 142 close to the traction beam 14 is larger than the end face area of ​​the other end. When the sand-sprinkling mounting seat 142 is welded to the traction beam 14 and the sand-sprinkling mounting plate 143, the welding area between the sand-sprinkling mounting seat 142 and the traction beam 14 is larger than the welding area between the sand-sprinkling mounting seat 142 and the sand-sprinkling mounting plate 143. In a limited space, the welding area between the sand-sprinkling mounting seat 142 and the traction beam 14 is first increased to improve the welding strength. At the same time, the sand-sprinkling mounting seat 142 is composed of the first special-shaped bent plate 1421, which not only improves the structural strength but also improves the modal performance.

[0096] In one embodiment, see Fig.16 As shown, the bogie also includes a stone removal device 91; see Figure 3 and Fig. 20As shown, the end beam 11 is provided with a stone-removing mounting seat 1141 and a stone-removing mounting plate 1142, the stone-removing mounting seat 1141 includes a plurality of second special-shaped bent plates 11411, and the plurality of second special-shaped bent plates 11411 enclose a cavity; one end of the stone-removing mounting seat 1141 is welded to the traction beam 14, and the other end of the stone-removing mounting seat 1141 is welded to the stone-removing mounting plate 1142, and the stone-removing device 91 is installed on the stone-removing mounting plate 1142; wherein, the welding area between the stone-removing mounting seat 1141 and the end beam 11 is greater than the welding area between the stone-removing mounting seat 1141 and the stone-removing mounting plate 1142.

[0097] A cavity is formed by enclosing a plurality of second special-shaped bent plates 11411, and the areas of the two end faces of the stone-removing mounting seat 1141 are different. The end face area of ​​the stone-removing mounting seat 1141 close to the end beam 11 is larger than the end face area of ​​the other end. When the stone-removing mounting seat 1141 is welded to the end beam 11 and the stone-removing mounting plate, the welding area between the stone-removing mounting seat 1141 and the end beam 11 is larger than the welding area between the stone-removing mounting seat 1141 and the stone-removing mounting plate. In a limited space, the welding area between the stone-removing mounting seat 1141 and the end beam 11 is first increased to improve the welding strength. At the same time, the stone-removing mounting seat 1141 is composed of the first special-shaped bent plate 1421, which not only improves the structural strength but also improves the modal performance.

[0098] There are two stone removal mounting seats 1141 and two sand spreading mounting seats 142, forming four outwardly extending leg-shaped supports, which directly provide a mounting interface for the stone removal and sand spreading device 92. The stone removal device 91 is fixed to the end beam 11 through the stone removal mounting seat 1141 and the stone removal mounting plate 1142, and the sand spreading device 92 is fixed to the traction beam 14 through the sand spreading mounting seat 142 and the sand spreading mounting plate 143.

[0099] In one embodiment, see Figure 3 As shown, both the end beam 11 and the traction beam 14 are provided with a brake mounting seat 113 , and the brake mounting seat 113 on the end beam 11 and the brake mounting seat 113 on the traction beam 14 are arranged symmetrically.

[0100] For example, see Figure 1 As shown, the bogie includes four brake devices 10 for braking the wheel discs installed at the four corners of the frame 1. Fig.21 As shown, the brake device 10 includes a caliper 101 and a brake disc 102 .

[0101] There are four brake mounting seats 113, two of which are mounted on the end beam 11, and the other two are mounted on the traction beam 14. Each brake mounting seat 113 includes four sub-seats, and the four sub-seats are connected to the same brake device 10.

[0102] In one embodiment, see Figure 1and Fig. 22 As shown, the bogie further includes a tread cleaning device 5, and the tread cleaning device 5 includes a grinder 51, and the grinder 51 is used to repair the tread profile of the wheel 23 according to the running state of the locomotive.

[0103] In this embodiment, the tread cleaning device 5 with the function of grinding the wheel 23 is used for the first time on a large axle load locomotive. The material of the part in contact with the wheel 23 has the grinding function, and the tread shaping function is realized in conjunction with the control logic to extend the service life of the wheel 23. The control logic can be that the tread cleaning device 5 is activated when the locomotive braking signal is recognized and the locomotive speed is greater than or equal to 30km / h, or it can be activated when the locomotive is identified to be idling and sliding, each time the action lasts for 20s and the relief lasts for 10s. The action frequency, action time and contact force can be adjusted according to the actual state of the wheel 23 when the locomotive is running.

[0104] See also Fig.16 As shown, the bogie further includes a wheel rim lubricating device 8, which includes a wheel rim lubricating nozzle 81 and a grease tank 82. The wheel rim lubricating nozzle 81 is installed on the stone removal and sand spreading device 92. Both ends of the end beam 11 are provided with wheel rim lubricating mounting seats 112, and the wheel rim lubricating device 8 is installed on the wheel rim lubricating mounting seats 112.

[0105] This embodiment also provides a large axle load locomotive, including the bogie provided in this embodiment.

[0106] The heavy axle load locomotive provided in this embodiment uses the bogie provided in this embodiment, adopts the direct drive motor 34 to drive the wheel pair 2, one end of the traction rod 62 is connected to the traction beam 14 of the frame 1, and the other end of the traction rod 62 is connected to the car body. When the car body rotates, the rotation angle of the traction rod 62 is small, and the lateral component of the bogie caused by the rotation angle of the traction rod 62 is also small. Moreover, the traction rod 62 is set at an angle with the horizontal plane, which can reduce the vertical distance between the intersection of the extension line of the traction rod 62 and the center line of the frame 1 and the track surface; at the same time, due to the first suspension structure One end of the structure and one end of the second suspension structure are connected to one side of the direct drive motor 34 housing, one end of the third suspension structure 37 is connected to the other side of the direct drive motor 34 housing, and the other ends of the first suspension structure, the second suspension structure and the third suspension structure 37 are respectively connected to three non-collinear installation positions on the box beam frame structure, to ensure that the motor torque reaction force is fully applied to the frame 1 without additional axle weight changes, and the combined action of the traction device 6 and the drive device 3 can achieve the purpose of smaller axle weight transfer of the whole vehicle. It is suitable for locomotives with large axle weights and has higher locomotive operation safety.

[0107] In one embodiment, the axle weight of the large axle weight locomotive is greater than or equal to 25 tons, and the power of each axle 21 is greater than or equal to 1200 kilowatts.

[0108] Exemplarily, the heavy-axle locomotive provided in this embodiment can be a freight electric locomotive with a B0-B0 axle arrangement.

[0109] In summary, the bogie provided in this embodiment includes a frame 1, wheelset 2, drive device 3, traction device 6, secondary suspension device 4, primary suspension device 7, wheel flange lubrication device 8, tread cleaning device 5, stone discharging device 91, sanding device 92, and braking device 10. Through the mutual cooperation of each part, under the conditions of meeting the domestic line clearance requirements and the limited space inside the bogie, the application of high-efficiency high-power permanent magnet direct drive motor technology and the application of flexible plate coupling technology with no wear, high efficiency, and low maintenance cost are realized; a low-position inclined traction device is adopted, one end of the traction rod is connected to the traction beam of the frame, and the other end of the traction rod is connected to the car body. When the car body rotates, the rotation angle of the traction rod is small, and the lateral component force of the bogie caused by the rotation angle of the traction rod is also small. Moreover, the traction rod is arranged at an angle with the horizontal plane, which can reduce the vertical distance between the intersection of the extension line of the traction rod and the center line of the frame and the track surface, achieving the purpose of smaller axle load transfer of the whole vehicle and being beneficial to exerting large traction force; at the same time, the H-shaped frame is welded by strengthened box-shaped beams, and various mounting seats are reasonably arranged on the frame to realize the connection and installation of various functional components; the drive device adopts a three-point suspended structure and is equipped with structures such as a flexible plate coupling and a protective cover, taking into account the advantages of displacement compensation, vibration reduction, protection, and convenient maintenance; in addition, the parameters of the primary suspension device and the secondary suspension device are matched, and the parameters of the primary suspension device are matched with the parameters of the flexible plate coupling; furthermore, a tread cleaning device with grinding elements is equipped to extend the service life of the wheelset, and a disc braking device is adopted and equipped with a wheel flange lubrication device to ensure the safe operation of the heavy-axle high-power locomotive.

[0110] Applying this bogie to a heavy-axle high-power freight locomotive with an axle load greater than or equal to 25 tons and the power of each axle 21 greater than or equal to 1200 kW can ensure that the locomotive is efficient, green and environmentally friendly, and has low maintenance costs during operation.

[0111] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A bogie, characterized in that: include: A frame, the frame comprising a box beam frame structure, the box beam frame structure comprising a traction beam; A driving device, the driving device comprising a direct drive motor, a first suspension structure, a second suspension structure and a third suspension structure, one end of the first suspension structure and one end of the second suspension structure are both connected to one side of the housing of the direct drive motor, one end of the third suspension structure is connected to the other side of the housing of the direct drive motor, and the other ends of the first suspension structure, the second suspension structure and the third suspension structure are respectively connected to three non-collinear installation positions on the box beam frame structure; A wheelset, the wheelset being mounted on the frame, the wheelset comprising an axle and a wheel, the axle being connected to an output shaft of the direct drive motor, and the wheel being connected to the axle; as well as A traction device, comprising a traction rod, one end of which is mounted on the traction beam, and the other end of which is used to connect with the vehicle body, wherein the traction rod is arranged at an angle to the horizontal plane to reduce the vertical distance between the intersection of the extension line of the traction rod and the center line of the frame and the track surface.

2. The bogie according to claim 1, characterized in that: The box beam frame structure further includes an end beam, a first side beam and a second side beam, the end beam is arranged opposite to the traction beam, the first side beam is arranged opposite to the second side beam, and the end beam, the traction beam, the first side beam and the second side beam are connected to form the box beam frame structure; The frame further comprises a cross beam, one end of which is connected to the first side beam, and the other end of which is connected to the second side beam.

3. The bogie according to claim 2, characterized in that: There are two drive devices and two wheelsets, and the drive devices are connected to the wheelsets in a one-to-one correspondence. The direct drive motor in one of the drive devices is installed between the end beam and the cross beam through the first suspension structure, the second suspension structure, and the third suspension structure, and the direct drive motor in the other drive device is installed between the traction beam and the cross beam through the first suspension structure, the second suspension structure, and the third suspension structure.

4. The bogie according to claim 3, characterized in that: The first suspension structure and the second suspension structure both include a suspension rod, one end of the suspension rod in the driving device installed between the end beam and the cross beam is connected to the housing of the direct drive motor, and the other end is connected to the end beam; One end of a suspension rod in a driving device installed between the traction beam and the cross beam is connected to the housing of the direct drive motor, and the other end is connected to the traction beam; The third suspension structure includes a motor mounting plate and a connecting portion, one side of the motor mounting plate is connected to the housing of the direct drive motor, the connecting portion is connected to the side of the motor mounting plate away from the motor, and the connecting portion is connected to the cross beam; a recessed portion is provided on the side of the connecting portion close to the first side beam to form an operating space with the first side beam, and / or a recessed portion is provided on the side of the connecting portion close to the second side beam to form an operating space with the second side beam.

5. The bogie according to claim 4, characterized in that: The connecting portion includes a vertical rib plate and a transverse rib plate, the vertical rib plate is vertically connected to the motor mounting plate, and the transverse rib plate is vertically connected to both the mounting plate and the vertical rib plate; the transverse rib plate has at least one straight edge and at least one curved edge, at least one straight edge is connected to the motor mounting plate, and the curved edge is bent toward the straight edge to form the recessed portion; the vertical rib plate is provided with a mounting hole, a rubber joint is provided in the mounting hole, and the rubber joint is connected to the crossbeam.

6. The bogie according to claim 3, characterized in that: The driving device further comprises a flexible plate coupling and a protective cover, the flexible plate coupling comprises a hollow shaft, the axle is passed through the hollow shaft, the end face teeth of the flexible plate coupling are connected to the direct drive motor, and the force transmission pin of the coupling is connected to the wheel; The protective cover is connected to the direct drive motor, and the protective cover is provided with at least one of a ventilation hole and a functional hole.

7. The bogie according to claim 1, characterized in that: It also includes a first-series suspension device, which includes a first axle box tie rod assembly, a second axle box tie rod assembly and a spring assembly, wherein the first axle box tie rod assembly and the second axle box tie rod assembly are respectively located on both sides of the axle; The box beam frame structure is provided with a first axle box tie rod mounting seat and a second axle box tie rod mounting seat, and axle boxes are provided at both ends of the axle; one end of the first axle box tie rod assembly is connected to one side of the axle box, and the other end of the first axle box tie rod assembly is connected to the first axle box tie rod mounting seat; one end of the second axle box tie rod assembly is connected to the other side of the axle box, and the other end of the second axle box tie rod assembly is connected to the axle box tie rod mounting seat; the spring assembly includes at least two springs which are nested with each other and spring seats installed at both ends of the springs.

8. The bogie according to claim 1, characterized in that: It also includes a secondary suspension device, which includes a rubber pile. The rubber pile is installed on a side of the box beam frame structure facing the vehicle body, and the lateral stiffness of the rubber pile is greater than the longitudinal stiffness of the rubber pile.

9. The bogie according to claim 1, characterized in that: The traction beam is provided with a sand-sprinkling mounting seat and a sand-sprinkling mounting plate, the sand-sprinkling mounting seat includes a plurality of first special-shaped bent plates, and the plurality of first special-shaped bent plates enclose a cavity; one end of the sand-sprinkling mounting seat is welded to the traction beam, and the other end of the sand-sprinkling mounting seat is welded to the sand-sprinkling mounting plate, wherein the welding area between the sand-sprinkling mounting seat and the traction beam is larger than the welding area between the sand-sprinkling mounting seat and the sand-sprinkling mounting plate.

10. The bogie according to claim 2, characterized in that: The end beam is provided with a stone removal mounting seat and a stone removal mounting plate, the stone removal mounting seat includes a plurality of second special-shaped bent plates, and the plurality of second special-shaped bent plates enclose a cavity; one end of the stone removal mounting seat is welded to the traction beam, and the other end of the stone removal mounting seat is welded to the stone removal mounting plate, wherein the welding area between the stone removal mounting seat and the end beam is greater than the welding area between the stone removal mounting seat and the stone removal mounting plate.

11. The bogie according to claim 2, characterized in that: The end beam and the traction beam are both provided with a brake mounting seat, and the brake mounting seat on the end beam is symmetrically arranged with the brake mounting seat on the traction beam; And / or, both the end beam and the traction beam are provided with a motor vibration absorber mounting seat, and the motor vibration absorber mounting seat on the end beam is symmetrically arranged with the motor vibration absorber mounting seat on the traction beam.

12. The bogie according to any one of claims 1 to 11, characterized in that It also includes a tread cleaning device, which includes a grinder. The grinder is used to repair the tread profile of the wheel according to the running state of the locomotive.

13. A large axle load locomotive, characterized in that: A bogie comprising the bogie described in any one of claims 1 to 12.

14. The large axle load locomotive according to claim 13, characterized in that: The axle weight of the large axle weight locomotive is greater than or equal to 25 tons, and the power of each axle is greater than or equal to 1200 kilowatts.

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