Bogie

Abstract

The bogie comprises a framework, a permanent magnet direct drive motor and at least one pair of wheels, each wheel is provided with a wheel hollow shaft, and a wheel solid shaft is arranged in each wheel hollow shaft in the axial direction; an elastic element is arranged on the outer side of each wheel, and the two connecting ends of each elastic element are detachably and fixedly connected with the outer end of the corresponding wheel hollow shaft and the outer end of the corresponding wheel solid shaft respectively. The permanent magnet direct drive motor is hung on the framework, two opposite output shafts are arranged on the permanent magnet direct drive motor in the length direction of the wheel solid shafts, and the two output shafts are connected with the wheel solid shafts on the left side and the right side through couplings respectively; torque output by the permanent magnet direct drive motor is transmitted to the wheel solid shaft through the coupling, the wheel solid shaft transmits the torque to the wheel hollow shaft through the elastic element, and the wheel hollow shaft drives the wheel to rotate. The bogie solves the technical problem that rescue is difficult when a motor breaks down in the prior art.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail transit trains, and in particular relates to a bogie. Background Art

[0002] At present, the driving scheme of rail vehicle bogies is usually composed of motors, gearboxes and wheelsets. Since there is a certain amount of energy loss in the gearbox during the transmission process and the gearbox also has a certain weight, it is not conducive to energy saving and consumption reduction of the vehicle. At present, the driving mode of rail vehicle bogies is gradually developing towards the direction of direct drive by permanent magnet motors, which can greatly improve the transmission efficiency. However, this direct drive bogie has the following problems: (1) The motor usually adopts an axle-clamping suspension mode. The motor is non-elastically clamped on the axle through bearings. The weight of the non-elastic support of the vehicle is large, the wheel-rail impact is large, the ride comfort of the vehicle is poor, and the life of the motor bearings is also affected. If the wheelset is driven to rotate by the motor hollow shaft coupling, the radial size of the motor must be large enough to set the hollow shaft and solid shaft inside the motor. This will increase the size and weight of the motor. Compared with the gearbox drive mode, the entire bogie has no advantage in weight reduction. (2) When a motor bearing becomes stuck during operation on the line, the train cannot be driven directly back to the depot for repair. It is necessary to place a pulley under the wheel of the faulty wheelset and use an engineering vehicle to tow the train back to the depot at low speed for maintenance, making rescue very difficult. The purpose of towing at low speed is to prevent the normal motors in the train from becoming generators under towing conditions. The current generated needs to be consumed by resistors. If the speed is high and the current is too large, the vehicle's current consumption capacity is difficult to meet, and the rescue efficiency is low. (3) When repairing a faulty motor or a stuck wheel axle box bearing in the depot, the entire wheelset axle box device must be disassembled, which requires lifting the vehicle, withdrawing the wheels, removing the bearings, etc. The operation is complicated and can easily cause axle strain, resulting in a large amount of maintenance work. Summary of the Invention

[0003] In response to the current technical problems, the present invention aims to provide a bogie that can solve the technical problem of difficulty in rescuing when a motor fails in the prior art.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A bogie comprises a frame, a permanent magnet direct drive motor and at least one pair of wheels, and its structural features are: each wheel is provided with a hollow wheel shaft, and a solid wheel shaft is axially arranged inside the hollow wheel shaft; an elastic element is provided on the outside of each wheel, and the two connecting ends of the elastic element are respectively detachably fixedly connected to the outer end of the hollow wheel shaft and the outer end of the solid wheel shaft; the permanent magnet direct drive motor is suspended on the frame, and two opposing output shafts are provided on the permanent magnet direct drive motor along the length direction of the solid wheel shaft, and the two output shafts are respectively connected to the solid wheel shafts on the left and right sides through couplings; the torque output by the permanent magnet direct drive motor is transmitted to the solid wheel shaft through the coupling, and the solid wheel shaft transmits the torque to the hollow wheel shaft through the elastic element, and the hollow wheel shaft drives the wheel to rotate.

[0006] The elastic element provided on the bogie of the present application only needs to be able to connect the hollow wheel shaft and the solid wheel shaft and be able to adapt to deformation. The elastic element can be specifically selected according to the displacement of the first-stage suspension device. A rubber bushing can be used for a small displacement, and a diaphragm coupling or the like can be used for a large displacement. The hollow wheel shaft and the wheel can be connected by an interference fit. When the rail vehicle is in normal operating conditions, the torque output by the permanent magnet direct drive motor is transmitted to the solid wheel shaft through the coupling, and the solid wheel shaft then transmits the torque to the hollow wheel shaft through the elastic element. The hollow wheel shaft drives the wheel to rotate, thereby allowing the train to run on the track. When the permanent magnet direct drive motor fails, the coupling and the elastic element can be removed to achieve decoupling between the permanent magnet direct drive motor and the wheel. After decoupling, the train relies on other normal motors to drive and return to the maintenance section at a normal speed, thereby improving the convenience of rescue. The bogie of the present application does not have a complete axle between the left and right wheels. Instead, the drive shaft consists of three sections: the output shaft of the permanent magnet direct-drive motor, the solid wheel shaft, and the hollow wheel shaft. The permanent magnet direct-drive motor outputs torque at both ends through couplings. If the permanent magnet direct-drive motor fails, the transmission chain from the permanent magnet direct-drive motor to the wheel can be severed by simply removing the coupling and elastic element, turning the driving wheel into a driven wheel. The vehicle can then operate normally with the help of the other motors. The permanent magnet direct-drive motor used in the bogie of the present application adopts a frame-suspended structure and does not have a hollow shaft structure. Its radial dimension is smaller than that of traditional motors, which facilitates the design of a small wheelbase bogie, reduces unsprung mass, and improves wheel-rail interaction. The permanent magnet direct-drive motor in the bogie of the present application adopts a double-end direct drive structure, eliminating the gearbox, improving transmission efficiency, and reducing bogie weight. Due to the use of hollow wheel shafts in the bogie of the present application, the vertical displacement between the wheel and the permanent magnet direct-drive motor can be dissipated through the coupling and elastic element, and there is sufficient space.

[0007] Preferably, each wheel is connected to the frame via an axle housing, which includes a pivot arm and two lower housings located at the bottom of the pivot arm. Along the length of the frame side beam, one end of the pivot arm is provided with a U-shaped groove, and the other end of the pivot arm is provided with a connecting end, which is connected to the frame side beam via a rubber joint. The wheel is positioned within the U-shaped groove, and the two lower housings are respectively located at the bottom of the left and right side walls of the U-shaped groove, and both lower housings are removably fixed to the U-shaped groove. Both ends of the hollow wheel shaft extend through the abutment between the lower housing and the U-shaped groove, and bearings are provided at each penetration point. The axle housing and the frame are connected by rubber joints, providing elastic support for the longitudinal and lateral directions of the wheel. Because the lower housing and the pivot arm are detachable, if a wheel needs to be removed due to a stuck bearing, for example, the frame at the faulty wheel can be supported with a jack. Without disassembling the primary suspension system, only the lower housing is removed, and the wheel, hollow wheel shaft, and bearing can be removed together. Replacement of spare parts can complete the vehicle rescue. The axles of the left and right wheels are independent of each other, and the vertical movement of the rotating arms on the left and right axle boxes is also independent, which improves the wheel load reduction of the vehicle on twisted lines and enhances derailment safety.

[0008] Preferably, the bearings are tapered roller bearings, and the tapered roller bearings on the sidewalls of the U-shaped groove are installed back-to-back. Tapered roller bearings can simultaneously withstand axial and radial loads, and back-to-back installation is preferred. This arrangement provides a larger span, greater rigidity, improved bearing resistance to bending and overturning, and optimized load distribution.

[0009] Preferably, each wheel is equipped with a primary suspension device on both sides, with the lower ends of the primary suspension devices connected to the top of the U-shaped channel and the upper ends of the primary suspension devices connected to the side beams of the frame. Bearings and primary suspension devices are provided on both sides of the wheel, ensuring that the load exerted by the primary spring on both ends of the wheel axle is equal, and the axle forces are symmetrical.

[0010] Preferably, the U-shaped grooves on the left and right wheels are connected by a tie rod, which is arranged parallel to the solid wheel axle and hinged at both ends to the U-shaped groove. The tie rod between the two axle boxes maintains the wheel-back distance L between the left and right wheels and ensures that this distance L reaches the designed value, preventing the wheels from derailing when passing through the switch. Because the permanent magnet direct-drive motor directly drives the left and right wheels, the rotational speeds of the two wheels are equal. The tie rod enables the lateral movement of the two wheels to interact, thus providing wheel centering.

[0011] Preferably, the frame is an H-shaped structure, with three motor suspension points provided on both sides of the crossbeam of the frame, and the three motor suspension points on each side are connected to form a triangular structure; there are two permanent magnet direct drive motors, and one side of the two permanent magnet direct drive motors is hinged to the three motor suspension points. The permanent magnet direct drive motor adopts a frame suspension structure and does not have a hollow shaft structure. The radial size is smaller than that of a traditional motor. Since it does not adopt a gearbox transmission, it is conducive to the design of a small wheelbase D of the bogie. The permanent magnet direct drive motor can be connected to the motor suspension point by a connecting bolt. By loosening the connecting bolt and removing the coupling, the permanent magnet direct drive motor can be directly taken out without the need for a vehicle, wheel removal, bearing removal, etc., which facilitates the disassembly and maintenance of the motor.

[0012] Preferably, waist-shaped holes are provided at both ends of the side beams of the frame, and the tops of the wheels pass through the waist-shaped holes. Due to the waist-shaped holes, the wheels can pass through the ends of the frame, so that the height of the ends of the frame does not need to exceed the diameter of the wheels to avoid interference with the wheels, while maintaining the overall rigidity of the frame.

[0013] Preferably, a secondary suspension device is provided in the middle of each of the two side beams of the frame, and two pairs of wheels are provided, with the secondary suspension device being arranged on the centerline of the axles of the front and rear wheels. By arranging the positions of the secondary suspension devices, the load borne by the frame will not cause the frame to twist.

[0014] Preferably, a mounting opening is provided in the middle of the crossbeam of the frame, and two secondary suspension devices are symmetrically arranged about the mounting opening. A central traction device, a lateral shock absorber, and a lateral stop are provided within the mounting opening. The central traction device is mounted on the middle crossbeam of the frame and is equipped with a lateral shock absorber and a lateral stop. This fully utilizes the lateral stiffness of the secondary springs and improves lateral comfort during vehicle operation.

[0015] Preferably, the wheel is provided with a basic braking device, which is arranged on the outside of the hollow shaft of the wheel; the brake disc of the basic braking device is installed on the spoke plate of the wheel, and the brake caliper hanger of the basic braking device is connected to the side beam end of the frame by a three-point suspension.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The bogie of the present application does not have a complete axle between the wheels on the left and right sides, but a drive shaft composed of three sections, namely the output shaft of the permanent magnet direct drive motor, the solid shaft of the wheel and the hollow shaft of the wheel. Both ends of the permanent magnet direct drive motor output torque through the coupling. If the permanent magnet direct drive motor fails, it is only necessary to remove the coupling and the elastic element to cut off the transmission chain from the permanent magnet direct drive motor to the wheel, so that the driving wheel becomes the driven wheel. At this time, the vehicle can operate normally with the help of other motors, thereby improving the convenience of rescue.

[0018] 2. The permanent magnet direct drive motor used in the bogie of the present application adopts a frame-suspended structure and does not have a hollow shaft structure. Its radial size is smaller than that of traditional motors, which is conducive to the small wheelbase design of the bogie, reduces the unsprung mass, and improves the wheel-rail interaction force.

[0019] 3. The bogie of the present application adopts a double-end direct drive form for the permanent magnet direct drive motor, which eliminates the need for a gearbox, improves transmission efficiency, and reduces the weight of the bogie.

[0020] 4. The bogie of the present application adopts a hollow wheel shaft, so that the vertical displacement between the wheel and the permanent magnet direct drive motor can be consumed by the coupling and the elastic element, and there is enough space.

[0021] 5. The bogie of the present application has independent axles of the left and right wheels, and the vertical movement of the rotating arms on the left and right axle boxes is also independent, which improves the wheel load reduction performance of the vehicle on twisted lines and enhances derailment safety.

[0022] 6. The bogie of the present application is provided with bearings and primary suspension devices on both sides of the wheel, so that the loads exerted by the primary spring on both ends of the wheel axle are equal and the axle forces are symmetrical.

[0023] 7. The bogie of the present application uses a detachable lower box and a swing arm. When a wheel needs to be removed due to a stuck bearing or other working conditions, a jack is used to support the frame at the faulty wheel. There is no need to remove the primary suspension device. Only the lower box needs to be removed, and the wheel, hollow wheel shaft and bearing can be removed together. The vehicle can be rescued by replacing spare parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the front structure of the bogie of the present invention;

[0025] Figure 2 yes Figure 1 Schematic diagram of the top view structure;

[0026] Figure 3 yes Figure 1 Schematic diagram of the left view structure.

[0027] In the figure

[0028] 1-frame; 2-mounting port; 3-elastic element; 4-secondary vertical shock absorber; 5-secondary suspension device; 6-rubber joint; 7-axle box; 701-swing arm; 701-1-U-shaped groove; 701-2-connecting end; 702-lower box; 8-bearing; 9-wheel solid shaft; 10-wheel; 11-basic braking device; 1101-brake disc; 1102-brake clamp suspension rod; 12-wheel hollow shaft; 13-permanent magnet direct drive motor; 1301-output shaft; 14-central traction device; 15-coupling; 16-pull rod; 17-lateral shock absorber; 18-lateral stop; 19-primary suspension device; 20-waist-shaped hole; 21-motor suspension point; 22-primary vertical shock absorber; 23-brake clamp suspension rod suspension point. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments and features of the embodiments may be combined unless they conflict. For ease of description, the words "upper," "lower," "left," and "right" appear below merely to indicate the directions of upper, lower, left, and right in the accompanying drawings and do not limit the structure.

[0030] like Figure 1 and Figure 2As shown, a bogie of this embodiment includes a frame 1, two pairs of wheels 10, a primary suspension device 19, a secondary suspension device 5, two permanent magnet direct drive motors 13, a central traction device 14, a basic brake device 11, a secondary vertical shock absorber 4, a lateral shock absorber 17, a lateral stop 18, and a primary vertical shock absorber 22. The frame 1 is an H-shaped structure, with waist-shaped holes 20 provided at both ends of the side beams of the frame 1, through which the tops of the wheels 10 pass. Each wheel 10 is provided with a hollow wheel shaft 12, which has an interference fit with the wheel 10, and a solid wheel shaft 9 is axially disposed within the hollow wheel shaft 12. An elastic element 3 is provided on the outside of each wheel 10, with its two connecting ends being removably fixedly connected to the outer ends of the hollow wheel shaft 12 and the solid wheel shaft 9, respectively. Each wheel 10 is connected to the frame 1 via an axle housing 7, which includes a pivot arm 701 and two lower housings 702 located at the bottom of the pivot arm 701. Along the length of the frame 1 side beam, one end of the pivot arm 701 is provided with a U-shaped groove 701-1. The other end of the pivot arm 701 is provided with a connecting end 701-2, which is connected to the frame 1 side beam via a rubber joint 6. The wheel 10 is positioned within the U-shaped groove 701-1. The two lower housings 702 are respectively located at the bottom of the left and right side walls of the U-shaped groove 701-1. Both lower housings 702 are removably fixed to the U-shaped groove 701-1 via bolts. Both ends of the hollow wheel axle 12 extend through the junction of the lower housing 702 and the U-shaped groove 701-1, and bearings 8 are located at each penetration point. The upper half of the bearing 8 is located within the U-shaped groove 701-1, while the lower half of the bearing 8 is located within the lower housing 702. The bearing 8 is a tapered roller bearing, and the tapered roller bearings on the side walls of the U-shaped groove 701-1 are installed back to back. Figure 2 and Figure 3 As shown, in order to keep the wheel back distance L of the two wheels 10 unchanged, a pull rod 16 is set between the left and right axle boxes 7. The pull rod 16 is set parallel to the solid wheel shaft 9, and the two ends of the pull rod 16 are respectively hinged to the U-shaped groove 701-1. There are three motor suspension points 21 on both sides of the crossbeam of the frame 1, and the three motor suspension points 21 on each side are connected to form a triangular structure. The permanent magnet direct drive motor 13 is directly suspended on the frame 1, and one side of the two permanent magnet direct drive motors 13 is hinged to the three motor suspension points 21. As shown Figure 2 As shown, along the length direction of the wheel solid shaft 9, the permanent magnet direct drive motor 13 is provided with two opposite output shafts 1301, and the two output shafts 1301 are respectively connected to the wheel solid shaft 9 on the left and right sides through the coupling 15. The permanent magnet direct drive motor 13 drives the wheel solid shaft 9 in the wheel 10, and the wheel solid shaft 9 then drives the wheel hollow shaft 12 through the elastic element 3, thereby driving the wheel 10 to rotate. Figure 1As shown, the permanent magnet direct drive motor 13 adopts a frame-suspended structure and has no hollow shaft structure. Its radial size is smaller than that of a traditional motor. Since it does not use a gearbox transmission, it is conducive to the design of a small wheelbase D of the bogie. Figure 1 and Figure 3 As shown, each wheel 10 is provided with a primary suspension device 19 on both sides. The lower end of the primary suspension device 19 is connected to the top of the U-shaped groove 701-1, and the upper end of the primary suspension device 19 is connected to the side beam of the frame 1. A primary vertical shock absorber 22 is provided on the inner side of the primary suspension device 19. Figure 2 As shown, the middle of both side beams of the frame 1 is provided with a secondary suspension device 5, which is arranged on the centerline of the axles of the front and rear wheels 10. A secondary vertical shock absorber 4 is installed on one side of the secondary suspension device 5. The middle of the crossbeam of the frame 1 is provided with a mounting opening 2, and the two secondary suspension devices 5 are symmetrically arranged about the mounting opening 2. The mounting opening 2 is provided with a central traction device 14, a lateral shock absorber 17, and a lateral stop 18. Figure 1 and Figure 2 As shown, each wheel 10 is equipped with a basic brake device 11, which is arranged outside the hollow wheel shaft 12. The brake disc 1101 of the basic brake device 11 is mounted on the spoke plate of the wheel 10, and the brake caliper suspension rod 1102 of the basic brake device 11 is connected to three brake caliper suspension rod suspension points 23 on the end of the side beam of the frame 1. The three brake caliper suspension rod suspension points 23 are connected to form a triangular structure.

[0031] During normal train operation, the permanent magnet direct-drive motor 13 drives the solid wheel shaft 9 through the coupling 15. This force is then transmitted to the hollow wheel shaft 12 via the elastic element 3. The hollow wheel shaft 12 has an interference fit with the wheel 10, thereby driving the wheel 10 to rotate and enabling the train to operate on the track. When the train is operating in a curve, the connecting rod 16 connects the two axle housings 7 together. The lateral movement of the two wheels 10 interacts to control the inside distance of the wheelset. During operation, the displacement capability of the coupling 15 and the elastic element 3 is utilized to accommodate the required vertical displacement between the hollow wheel shaft 12 and the motor shaft of the permanent magnet direct-drive motor 13. When the train is braking, brake discs 1101 are mounted on both sides of the wheel 10's spokes. The brake caliper hanger 1102 of the three-point suspension base brake system 11 is suspended from the frame 1. During braking, braking force is applied to the brake discs 24, braking the vehicle.

[0032] When the permanent magnet direct drive motor 13 has a fault such as a stuck motor bearing, the coupling 15 and the elastic element 3 are removed to achieve decoupling between the permanent magnet direct drive motor 13 and the wheel 10. After decoupling, the train can rely on other normal motors to operate normally and return to the maintenance section. By loosening the connecting bolts between the permanent magnet direct drive motor 13 and the frame 1, the permanent magnet direct drive motor 13 can be directly taken out without the need to lift the vehicle, withdraw the wheel, remove the bearing, etc., which facilitates the disassembly and maintenance of the permanent magnet direct drive motor 13. When the bearing 8 on the axle box 7 is stuck and the wheelset needs to be disassembled, the frame 1 at the faulty wheel is supported by a jack. There is no need to disassemble the primary suspension device 19. Only the lower box 702 needs to be removed to remove the wheel 10, brake disc 1101, wheel hollow shaft 12 and bearing 8 together. The above components can be replaced with spare parts to complete the vehicle rescue.

[0033] The contents described in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the invention, and are not used to limit the scope of the invention. After reading the present invention, various equivalent modifications to the embodiments made by those skilled in the art fall within the scope defined by the claims attached to the present invention.

Claims

1. A bogie comprising a frame (1), a permanent magnet direct drive motor (13) and at least one pair of wheels (10), characterized in that: Each wheel (10) is provided with a wheel hollow shaft (12), and a wheel solid shaft (9) is axially arranged inside the wheel hollow shaft (12); an elastic element (3) is provided on the outside of each wheel (10), and two connecting ends of the elastic element (3) are respectively detachably fixedly connected to the wheel hollow shaft (12) and the outer end of the wheel solid shaft (9); the permanent magnet direct drive motor (13) is suspended on the frame (1), and along the length direction of the wheel solid shaft (12), two opposite output shafts (1301) are provided on the permanent magnet direct drive motor (13), and the two output shafts (1301) are respectively connected to the wheel solid shafts (9) on the left and right sides through a coupling (15); the torque output by the permanent magnet direct drive motor (13) is transmitted to the wheel solid shaft (12) through the coupling (15), and the wheel solid shaft (12) transmits the torque to the wheel hollow shaft (12) through the elastic element (3), and the wheel hollow shaft (12) drives the wheel (10) to rotate.

2. The bogie according to claim 1, characterized in that: Each wheel (10) is connected to the frame (1) through an axle box (7), and the axle box (7) includes a rotating arm (701) and two lower boxes (702) located at the bottom of the rotating arm (701); along the length direction of the side beam of the frame (1), one end of the rotating arm (701) is provided with a U-shaped groove (701-1), and the other end of the rotating arm (701) is provided with a connecting end (701-2), and the connecting end (701-2) is connected to the side beam of the frame (1) through a rubber The wheel (10) is arranged in the U-shaped groove (701-1), and the two lower boxes (702) are respectively arranged at the bottom of the left and right side walls of the U-shaped groove (701-1), and the two lower boxes (702) are detachably fixedly connected to the U-shaped groove (701-1); both ends of the wheel hollow shaft (12) pass through the abutment of the lower box (702) and the U-shaped groove (701-1), and the passing parts are each provided with a bearing (8).

3. The bogie according to claim 2, characterized in that: The bearings (8) are tapered roller bearings, and the tapered roller bearings on the side walls on both sides of the U-shaped groove (701-1) are installed back to back.

4. The bogie according to claim 2, characterized in that: Each wheel (10) is provided with a suspension device (19) on both sides. The lower end of the suspension device (19) is connected to the top of the U-shaped groove (701-1), and the upper end of the suspension device (19) is connected to the side beam of the frame (1).

5. The bogie according to claim 2, characterized in that: The U-shaped grooves (701-1) on the left and right wheels (10) are connected via a pull rod (16). The pull rod (16) is arranged parallel to the wheel solid shaft (9), and both ends of the pull rod (16) are respectively hinged to the U-shaped groove (701-1).

6. The bogie according to claim 1, characterized in that: The frame (1) is an H-shaped structure, and three motor suspension points (21) are provided on both sides of the crossbeam of the frame (1), and the three motor suspension points (21) on each side are connected to form a triangular structure; two permanent magnet direct drive motors (13) are provided, and one side of the two permanent magnet direct drive motors (13) is hinged to the three motor suspension points (21).

7. The bogie according to claim 6, characterized in that: Both ends of the side beams of the frame (1) are provided with waist-shaped holes (20), and the tops of the wheels (10) pass through the waist-shaped holes (20).

8. The bogie according to claim 6, characterized in that: The middle parts of the two side beams of the frame (1) are both provided with a secondary suspension device (5), two pairs of wheels (10) are provided, and the secondary suspension device (5) is arranged on the center lines of the wheel axles of the front and rear wheels (10).

9. The bogie according to claim 8, characterized in that: A mounting opening (2) is provided in the middle of the crossbeam of the frame (1), two secondary suspension devices (5) are symmetrically arranged about the mounting opening (2), and a central traction device (14), a lateral shock absorber (17) and a lateral stopper (18) are provided in the mounting opening (2).

10. The bogie according to any one of claims 1 to 9, characterized in that: The wheel (10) is provided with a basic braking device (11), which is arranged on the outside of the hollow wheel shaft (12); a brake disc (1101) of the basic braking device (11) is mounted on the spoke plate of the wheel (10), and a brake clamp suspension rod (1102) of the basic braking device (11) is connected to the end of the side beam of the frame (1) by a three-point suspension method.

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