Independent wheel sky rail driving bogie and connecting structure thereof

Abstract

The utility model discloses an independent wheel sky rail driving bogie and a connecting structure thereof. The independent wheel sky rail driving bogie comprises a framework assembly, and a rail containing space is formed in the middle of the framework assembly; a plurality of independent wheels which are fixed on the framework assembly and can independently rotate are arranged at the upper part of the track accommodating space, and the framework assembly can walk along the track through the independent wheels; a driving trolley which is fixed on the framework assembly and can walk along the bottom surface of the track fixing seat is arranged at the lower part of the track accommodating space; the driving trolley can drive the framework assembly to walk along the track through independent wheels; a suspension assembly used for bearing a suspension vehicle body is fixed to the lower portion of the framework assembly. The lower portion of the framework assembly is connected with a vehicle body vibration reduction connecting structure used for being connected with a suspended vehicle body. In the sky rail running process, when a curve, gradient change or local unevenness of a rail occurs, the independent wheels can flexibly adjust the rotating angle and speed according to actual conditions, and the independent wheels can be better attached to the outline of the rail.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transportation systems, in particular to an independent wheel idler rail driven bogie and a connection structure thereof. Background Art

[0002] In my country's current transportation landscape, intermodal transport remains at a relatively low level, with road transport having long dominated. This has led to inefficient coordination between road, rail, and water transport. Furthermore, the market environment is plagued by imperfections, regulatory standards struggle to adapt to actual needs, and the application of advanced technologies lags behind. While container transport has been widely used in freight transport sectors such as ports, logistics, and coal, it often faces numerous challenges in actual transportation. Due to the long distances between railway stations and the complex surrounding environments in some areas, transshipment operations rely on large numbers of container trucks, leading to a series of prominent issues such as congestion, pollution, inefficiency, and safety hazards. Against this backdrop, freight systems utilizing aerial rail transport have gradually gained traction and are attracting widespread market attention due to their potential to address these issues, demonstrating promising market prospects.

[0003] Existing suspended monorail systems, whether for passenger or freight transport, typically utilize a lower open track beam. Their running systems primarily utilize solid rubber wheels or pneumatic tires. This design provides excellent vibration damping during operation, providing a relatively comfortable transport environment for passengers and cargo, effectively reducing bumps and vibrations during transportation and ensuring smooth and safe transportation.

[0004] However, existing aerial rail transport vehicles also have some obvious defects. First, the rubber wheels are subject to severe wear during operation, which directly leads to their relatively short service life. A shorter service life means that the rubber wheels need to be replaced frequently throughout the life cycle, which greatly increases the operation and maintenance costs. From the actual market demand, freight aerial rails generally have application requirements of large volume, high frequency, long distance and large slopes. In this case, the excessively high maintenance cost of rubber wheels makes it difficult for the entire transportation system to be accepted by the market. Secondly, the vertical rigidity of the lower open track beam is poor. When the line is long, in order to ensure the stability and safety of the track, it is necessary to invest higher costs to build and maintain the track, which to a certain extent increases the overall cost of the project. Utility Model Content

[0005] The purpose of this utility model is to solve the shortcomings of the above-mentioned background technology and provide an independent wheel-rail driven bogie and its connection structure that can use steel wheels to travel on a fully enclosed box girder, which meets the actual needs of the market, effectively reduces costs and improves the overall efficiency of the transportation system.

[0006] To achieve this purpose, the independent wheel idler rail driven bogie designed by the utility model includes a frame assembly, a track accommodating space is provided in the middle part of the frame assembly; a plurality of independent wheels fixed to the frame assembly and capable of rotating independently are provided in the upper part of the track accommodating space, and the frame assembly can move along the track through the independent wheels; a driving trolley fixed to the frame assembly and capable of moving along the bottom surface of the track fixing seat is provided in the lower part of the track accommodating space, and the driving trolley can drive the frame assembly to move along the track through the independent wheels; a suspension assembly for carrying a suspended vehicle body is fixed to the lower part of the frame assembly; and a vehicle body vibration damping connection structure for connecting the suspended vehicle body is connected to the lower part of the frame assembly.

[0007] Furthermore, the frame assembly includes a frame body, which includes a middle frame, a top frame fixedly connected to the top of the middle frame, and a bottom frame fixedly connected to the bottom of the middle frame; the track accommodating space is provided in the middle frame, the independent wheel is fixed to the top frame, the driving trolley is fixed to the middle frame, the suspension assembly is fixed to the bottom frame, and the vehicle body vibration damping connection structure is connected to the bottom frame.

[0008] Furthermore, the independent wheel includes a wheel and an axle, and both ends of the axle are coaxially connected to a set of bearing mechanisms, and the axle can rotate in the bearing mechanism. The bearing mechanism includes a bearing coaxially connected to the axle and a limiting structure coaxially arranged on the axle for limiting the axial movement of the bearing. An elastic support part is sleeved and connected on the bearing, and the elastic support part is arranged perpendicular to the axle. A support fixing plate is fixed on the top of the elastic support part, and the support fixing plate is fixed on the frame assembly.

[0009] Furthermore, the limiting structure includes a rear retaining ring and an end cover coaxially connected to the axle and used to limit the movement of the bearing along its axial direction.

[0010] Furthermore, a shaft cylinder is sleeved on the bearing, and one end of the shaft cylinder is provided with a bent portion that cooperates with the side of the bearing close to the wheel and is axially positioned with the bearing, and the other end of the shaft cylinder is axially tightly connected to the axle box cover; at least one of the elastic support parts is fixed on the front and rear sides of the shaft cylinder, which includes a guide column structure fixedly connected to the outer ring of the shaft cylinder and arranged perpendicular to the axle direction, the top of the guide column structure is coaxially fixedly connected to the support fixing plate, and the bottom of the guide column structure is fixedly connected to the bottom limit plate, and an elastic connecting piece is coaxially provided on the guide column structure, which is connected between the support fixing plate and the bottom limit plate, and the support fixing plate can move relative to the bottom limit plate along the axial direction of the guide column structure.

[0011] Furthermore, the driving trolley includes a trolley driving device and a plurality of positioning wheels connected to the trolley driving device and driven by the trolley driving device, and the positioning wheels can move along the bottom surface of the track fixing seat.

[0012] Furthermore, an elastic support member is connected between the middle frame and the trolley drive device, which is used to support the trolley drive device and make the positioning wheel contact the bottom surface of the track fixing seat.

[0013] Furthermore, the suspension assembly includes a suspension rod with its top inserted into and fixed inside the bottom frame and a pillow beam fixed to the bottom of the suspension rod, and a top surface of the pillow beam is provided with a plurality of elastic support structures for supporting the suspension body.

[0014] Furthermore, the vehicle body vibration-damping connection structure includes shock absorbers symmetrically connected to the left and right sides of the bottom frame, and a traction rod connected to the front or rear of the bottom frame.

[0015] Furthermore, a connection structure of an independent wheel rail driven bogie includes a track and a track fixing seat, the track is fixed to the top surface of the track fixing seat, the track and the track fixing seat are arranged in the track accommodating space, the independent wheel is arranged on the track, and the top of the driving trolley is arranged in a rolling manner with the bottom surface of the track fixing seat.

[0016] The beneficial effects of the present invention are as follows: a plurality of independent wheels are provided on the upper part of the middle track accommodation space of the frame assembly of the present invention, and these independent wheels can rotate independently. During the process of traveling on the empty track, when encountering curves, slope changes or local unevenness of the track, the independent wheels can flexibly adjust the rotation angle and speed according to the actual situation, better fit the track contour, effectively reduce the slip and wear between the wheels and the track, improve the adaptability and stability of the bogie running on the track, reduce the risk of derailment, and ensure that the empty track vehicle travels safely and smoothly on complex track lines. The arrangement of the independent wheels makes the distribution of the contact points between the bogie and the track more reasonable, can evenly disperse the weight of the vehicle, avoid damage to the track due to excessive local pressure, and is also conducive to maintaining the balance of the vehicle during operation, reducing the shaking and bumping of the vehicle, and ensuring the safety of cargo transportation. The design of the track accommodation space enables the frame assembly to cooperate with the track accurately, providing a stable installation and operation environment for the independent wheels and the drive trolley. The rational planning of this space ensures that all components operate without interference from external factors while on the track. It also enables efficient power transmission and motion conversion within the confined space, improving the overall performance and reliability of the bogie. The drive trolley, located below the track housing, is fixed to the frame assembly and travels along the underside of the track mounts, simultaneously driving the frame assembly along the track via independent wheels. This unique drive system utilizes a coordinated design, with the drive trolley and independent wheels working together to effectively transmit driving force throughout the bogie. This ensures sufficient power to overcome operational resistance, such as air resistance and track friction, enabling rapid starting, acceleration, grade climbing, and stable operation. The drive trolley's design allows for flexible adjustment of its power and torque output to suit various operating scenarios and vehicle loads, enhancing the versatility and adaptability of the ASR vehicle. Furthermore, a rational control strategy optimizes power distribution between the drive trolley and independent wheels, further improving energy efficiency and reducing operating costs. The combination of independent wheels and the drive trolley forms a highly efficient drive system. The independent wheels carry the vehicle's weight and provide steering, while the drive trolley provides power. The two complement each other, making the bogie's operation on the track smoother and more efficient. This coordinated drive mechanism ensures excellent power and handling performance during operation, improving the efficiency and reliability of the vehicle's operation and reducing parking accidents caused by powertrain failures. The suspension assembly, fixed below the frame assembly, supports the suspended vehicle body and effectively cushions and absorbs various vibrations and shocks from the track and vehicle during operation.Whether it's due to minor unevenness on the track surface or the inertial forces generated by the vehicle during dynamic processes such as acceleration, deceleration, and cornering, the suspension assembly can adjust and attenuate these forces through its elastic elements and damping devices, providing a relatively stable support environment for the suspended carbody, protecting the carbody structure and internal equipment from damage, and extending the vehicle's service life. The carbody vibration-damping connection structure connects the frame assembly to the suspended carbody, further enhancing the vehicle's vibration-damping performance. It can effectively isolate the vibration and noise transmitted from the bogie, reducing the risk of damage to the cargo. At the same time, during vehicle operation, the carbody vibration-damping connection structure can also compensate for the relative displacement between the carbody and the bogie caused by factors such as track deformation and changes in vehicle posture, ensuring that the connection between the two remains stable and reliable, improving the overall comfort and safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A perspective view of an independent wheel idler rail driven bogie in the present invention;

[0018] Figure 2 This is a left side view of the independent wheel idler rail driven bogie in the present utility model;

[0019] Figure 3 This is a front view of the internal track arrangement of the independent wheel idler rail driven bogie in the utility model;

[0020] Figure 4 It is a three-dimensional diagram of the main frame of the utility model;

[0021] Figure 5 It is a three-dimensional diagram of the independent wheel in the utility model;

[0022] Figure 6 This is a front view of the independent wheel in the utility model;

[0023] Figure 7 for Figure 6 Middle AA section view;

[0024] Among them, 1—track accommodating space, 2—independent wheel (2.1—wheel, 2.2—axle), 3—driving trolley (3.1—trolley driving device, 3.2—positioning wheel), 4—frame body (4.1—top frame, 4.2—middle frame, 4.3—bottom frame), 5—bearing, 6—support fixing plate, 7—rear retaining ring, 8—end cover, 9—bottom limit plate, 10—elastic support member, 11—suspension rod, 12—bolster, 13—shock absorber, 14—traction rod, 15—track, 16—track fixing seat, 17—car body support spring, 18—side roll stop, 19—axle box cover, 20—elastic support ring, 21—metal support ring, 22—axle cylinder, 23—bending part, 24—guide column, 25—elastic connecting member, 26—guide column axle box, 27—guide column sleeve. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, rather than all the embodiments. In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0026] like Figure 1 As shown in FIG7 , in certain embodiments, the independent wheel rail driven bogie designed by the present invention includes a frame assembly, a track accommodating space 1 is provided in the middle of the frame assembly; a plurality of independent wheels 2 fixed to the frame assembly and capable of rotating independently are provided in the upper portion of the track accommodating space 1, and the frame assembly can move along the track 15 through the independent wheels 2; a driving trolley 3 fixed to the frame assembly and capable of moving along the bottom surface of the track fixing seat 16 is provided in the lower portion of the track accommodating space 1, and the driving trolley 3 can drive the frame assembly to move along the track 15 through the independent wheels 2; a suspension assembly for supporting a suspended vehicle body is fixed to the lower portion of the frame assembly; and a vehicle body vibration damping connection structure for connecting the suspended vehicle body is connected to the lower portion of the frame assembly.

[0027] Example 1

[0028] On the basis of certain embodiments, the structure of the frame assembly 4 is further optimized and designed: the frame assembly includes a frame body 4, the frame body 4 includes a middle frame 4.2, a top frame 4.1 fixedly connected to the top of the middle frame 4.2, and a bottom frame 4.3 fixedly connected to the bottom of the middle frame 4.2; a track accommodating space 1 is provided in the middle frame 4.2, four independent wheels 2 are fixed on the top frame 4.1, the driving trolley 3 is fixed on the middle frame 4.2, the suspension assembly is fixed on the bottom frame 4.3, and the vehicle body vibration reduction connection structure is connected to the bottom frame 4.3.

[0029] Example 2

[0030] On the basis of certain embodiments or embodiment 1, the independent wheel mechanism is further optimized: Figure 5As shown in Figure 7, the independent wheel 2 includes a wheel 2.1 and an axle 2.2. A set of bearing mechanisms are coaxially connected to both ends of the axle 2.2. The axle 2.2 can rotate in the bearing mechanism. The bearing mechanism includes a bearing 5 coaxially connected to the axle 2.2 and a limiting structure coaxially arranged on the axle 2.2 for limiting the axial movement of the bearing 5. The limiting structure includes a rear retaining ring 7 and an end cover 8 coaxially connected to the axle 2.2 for limiting the axial movement of the bearing 5. A shaft cylinder 22 is sleeved on the bearing 5, and one end of the shaft cylinder 22 is provided with a bent portion 23 that cooperates with the side of the bearing 5 close to the wheel and is axially positioned with the bearing 5, and the other end of the shaft cylinder 22 is axially tightly connected with the axle box cover 24; the front and rear sides of the shaft cylinder 22 are respectively fixed with an elastic support portion, which includes a guide column structure fixedly connected to the outer ring of the shaft cylinder 22 and arranged in a direction perpendicular to the axle 2.2, the top of the guide column structure is coaxially fixedly connected with a support fixing plate 6, and the bottom of the guide column structure is fixedly connected with a bottom limit plate 9, and an elastic connecting member 25 is coaxially provided on the guide column structure, which is connected between the support fixing plate 6 and the bottom limit plate 9, and the support fixing plate 6 can move relative to the bottom limit plate 9 along the axial direction of the guide column structure, and the support fixing plate 6 is fixed on the top frame 4.1, and an avoidance hole is opened on the top frame 4.1. Specifically, the guide post structure includes a guide post shaft housing 26, which includes a bottom limit plate 9 and a guide post sleeve 27 vertically fixedly connected to the bottom limit plate 9. The guide post sleeve 27 is coaxially arranged with a guide post 24, and the top of the guide post 24 is fixedly connected to the support plate 6. The guide post sleeve 27 is coaxially sleeved with an elastic support ring 20 and a metal support ring 21, and an elastic connector 25 is connected between the metal support ring 21 and the support plate 6.

[0031] Example 3

[0032] Based on the first or second embodiment, the structure of the driving trolley 3 is further optimized: the driving trolley 3 includes a trolley drive device 3.1 and a plurality of positioning wheels 3.2 connected to and driven by the trolley drive device 3.1. The positioning wheels 3.2 can move along the bottom surface of the track fixing base 17. An elastic support member 10 is connected between the middle frame 4.2 and the trolley drive device 3.1 to support the trolley drive device 3.1 and ensure that the positioning wheels 3.2 contact the bottom surface of the track fixing base 17.

[0033] Example 4

[0034] On the basis of the first, second or third embodiment, the structure of the suspension assembly is further optimized: the suspension assembly includes a suspension rod 11 whose top is inserted into and fixed inside the bottom frame 4.3, and a bolster 12 fixed to the bottom of the suspension rod 11. The top surface of the bolster 12 is provided with a plurality of body support springs 17 for supporting the suspension body.

[0035] Example 5

[0036] Based on Example 1 or Example 2 or Example 3 or Example 4, the vehicle body vibration damping connection structure is further optimized and designed: the vehicle body vibration damping connection structure includes shock absorbers 13 symmetrically connected to the left and right sides of the bottom frame 4.3, and a traction rod 14 connected to the front or rear of the bottom frame 4.3.

[0037] Example 6

[0038] Based on certain embodiments or embodiment 1 or embodiment 2 or embodiment 3 or embodiment 4 or embodiment 5, a connection structure of an independent wheel idler rail driven bogie is designed, such as Figure 2 As shown, it includes a track 15 and a track fixing seat 16, the track 15 is fixed to the top surface of the track fixing seat 16, the track 15 and the track fixing seat 16 are arranged in the track accommodating space 1, the independent wheel 2 is arranged on the track 15, and the top of the driving trolley 3 is arranged to roll with the bottom surface of the track fixing seat 16.

[0039] The bogie designed in this utility model utilizes steel wheels, resulting in a long wheel life and low maintenance costs. It can be adapted to fully enclosed track beam structures, requiring less steel for the track beam and lowering the cost of the open-track system. The driving trolley 3 is driven by a linear motor, unconstrained by adhesion between the steel wheels and the track, overcoming the limited gradeability of traditional steel-wheeled vehicles. Furthermore, the bogie has a low unsprung weight. The bogie is the vehicle's running mechanism on the open-track. Four independent wheels 2 are elastically mounted to the main frame 4. The main frame 4 suspends a bolster 12 and a vehicle support spring 17 via a suspension rod 11, which bears the weight of the vehicle frame. A brake caliper is mounted on the main frame 4, with the brake disc and caliper providing adhesion braking force. The linear motor driving the trolley 3 is suspended between the main frame 4 and the track mount 16 via an elastic support 10. The elastic support 10 ensures an air gap between the linear motor during vehicle operation. Tie rods secure the linear motor to the main frame 4 in both the transverse and longitudinal directions. Roll stops 18 are installed at the bottom of the main frame 4 to prevent hard contact between the car body and the bogie. Shock absorbers 13 and traction rods 14 connect the bogie frame to the vehicle frame. The bogie designed in this utility model is powered by a drive trolley 3, enabling stable movement along the track 15. The car body beneath the suspension assembly carries the cargo, meeting the requirements of rail-based transportation.

[0040] In summary, a plurality of independent wheels are arranged on the upper part of the track accommodating space in the middle of the frame assembly of the utility model, and these independent wheels can rotate independently. During the operation of the empty track, when encountering curves, slope changes or local unevenness of the track, the independent wheels can flexibly adjust the rotation angle and speed according to the actual situation, better fit the track contour, effectively reduce the slip and wear between the wheels and the track, improve the adaptability and stability of the bogie running on the track, reduce the risk of derailment, and ensure that the empty track vehicle runs safely and smoothly on complex track lines. The arrangement of the independent wheels makes the distribution of the contact points between the bogie and the track more reasonable, can evenly disperse the weight of the vehicle, avoid damage to the track due to excessive local pressure, and is also conducive to maintaining the balance of the vehicle during operation, reducing the shaking and bumping of the vehicle, and ensuring the safety of cargo transportation. The design of the track accommodating space enables the frame assembly to cooperate with the track accurately, providing a stable installation and operation environment for the independent wheels and the drive trolley. The rational planning of this space ensures that all components operate without interference from external factors while on the track. It also enables efficient power transmission and motion conversion within the confined space, improving the overall performance and reliability of the bogie. The drive trolley, located below the track housing, is fixed to the frame assembly and travels along the underside of the track mounts, simultaneously driving the frame assembly along the track via independent wheels. This unique drive system utilizes a coordinated design, with the drive trolley and independent wheels working together to effectively transmit driving force throughout the bogie. This ensures sufficient power to overcome operational resistance, such as air resistance and track friction, enabling rapid starting, acceleration, grade climbing, and stable operation. The drive trolley's design allows for flexible adjustment of its power and torque output to suit various operating scenarios and vehicle loads, enhancing the versatility and adaptability of the ASR vehicle. Furthermore, a rational control strategy optimizes power distribution between the drive trolley and independent wheels, further improving energy efficiency and reducing operating costs. The combination of independent wheels and the drive trolley forms a highly efficient drive system. The independent wheels carry the vehicle's weight and provide steering, while the drive trolley provides power. The two complement each other, making the bogie's operation on the track smoother and more efficient. This coordinated drive mechanism ensures excellent power and handling performance during operation, improving the efficiency and reliability of the vehicle's operation and reducing parking accidents caused by powertrain failures. The suspension assembly, fixed below the frame assembly, supports the suspended vehicle body and effectively cushions and absorbs various vibrations and shocks from the track and vehicle during operation.Whether it's due to minor unevenness on the track surface or the inertial forces generated by the vehicle during dynamic processes such as acceleration, deceleration, and cornering, the suspension assembly can adjust and attenuate these forces through its elastic elements and damping devices, providing a relatively stable support environment for the suspended carbody, protecting the carbody structure and internal equipment from damage, and extending the vehicle's service life. The carbody vibration-damping connection structure connects the frame assembly to the suspended carbody, further enhancing the vehicle's vibration-damping performance. It can effectively isolate the vibration and noise transmitted from the bogie, reducing the risk of damage to the cargo. At the same time, during vehicle operation, the carbody vibration-damping connection structure can also compensate for the relative displacement between the carbody and the bogie caused by factors such as track deformation and changes in vehicle posture, ensuring that the connection between the two remains stable and reliable, improving the overall comfort and safety of the vehicle.

[0041] Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and is susceptible to numerous variations. Any simple modifications, equivalent variations, and modifications to the above embodiments based on the technical essence of the present invention shall be deemed to fall within the scope of protection of the present invention.

Claims

1. An independent wheel idler rail driven bogie, characterized in that: It comprises a frame assembly, wherein a track accommodating space (1) is provided in the middle of the frame assembly; a plurality of independent wheels (2) fixed to the frame assembly and capable of rotating independently are provided on the upper part of the track accommodating space (1), and the frame assembly can move along a track (15) via the independent wheels (2); a driving trolley (3) fixed to the frame assembly and capable of moving along the bottom surface of a track fixing seat (16) is provided on the lower part of the track accommodating space (1), and the driving trolley (3) can drive the frame assembly to move along the track (15) via the independent wheels (2); a suspension assembly for carrying a suspended vehicle body is fixed to the lower part of the frame assembly; and a vehicle body vibration reduction connection structure for connecting the suspended vehicle body is connected to the lower part of the frame assembly.

2. The independent wheel idler rail driven bogie according to claim 1, characterized in that: The frame assembly comprises a frame body (4), the frame body (4) comprising a middle frame (4.2), a top frame (4.1) fixedly connected to the top of the middle frame (4.2), and a bottom frame (4.3) fixedly connected to the bottom of the middle frame (4.2); the track accommodating space (1) is provided in the middle frame (4.2), the independent wheel (2) is fixed to the top frame (4.1), the driving trolley (3) is fixed to the middle frame (4.2), the suspension assembly is fixed to the bottom frame (4.3), and the vehicle body vibration reduction connection structure is connected to the bottom frame (4.3).

3. The independent wheel idler rail driven bogie according to claim 2, characterized in that: The independent wheel (2) comprises a wheel (2.1) and an axle (2.2); both ends of the axle (2.2) are coaxially connected to a set of bearing mechanisms, the axle (2.2) can rotate in the bearing mechanism, the bearing mechanism comprises a bearing (5) coaxially connected to the axle (2.2) and a limiting structure coaxially arranged on the axle (2.2) for limiting the axial movement of the bearing (5); an elastic support portion is sleeved and connected on the bearing (5), the elastic support portion is arranged perpendicular to the axle (2.2), a support fixing plate (6) is fixed to the top of the elastic support portion, and the support fixing plate (6) is fixed to the frame assembly.

4. The independent wheel idler rail driven bogie according to claim 3, characterized in that: The limiting structure comprises a rear retaining ring (7) and an end cover (8) coaxially connected to the axle (2.2) and used to limit the movement of the bearing (5) along its axial direction.

5. The independent wheel idler rail driven bogie according to claim 4, characterized in that: The bearing (5) is sleeved with a shaft cylinder (22), one end of the shaft cylinder (22) is provided with a bent portion (23) that cooperates with the side of the bearing (5) close to the wheel and is axially positioned with the bearing (5), and the other end of the shaft cylinder (22) is axially tightly connected with an axle box cover (24); at least one elastic support portion is fixed to the front and rear sides of the shaft cylinder (22), which includes a guide column structure fixedly connected to the outer ring of the shaft cylinder (22) and arranged in a direction perpendicular to the axle (2.2), the top of the guide column structure is coaxially fixedly connected to the support fixing plate (6), and the bottom of the guide column structure is fixedly connected to the bottom limit plate (9), and an elastic connecting member (25) is coaxially provided on the guide column structure, which is connected between the support fixing plate (6) and the bottom limit plate (9), and the support fixing plate (6) can move relative to the bottom limit plate (9) along the axial direction of the guide column structure.

6. The independent wheel idler rail driven bogie according to claim 2, characterized in that: The driving trolley (3) comprises a trolley drive device (3.1) and a plurality of positioning wheels (3.2) connected to the trolley drive device (3.1) and driven by the trolley drive device (3.1), wherein the positioning wheels (3.2) can move along the bottom surface of the track fixing seat (16).

7. The independent wheel idler rail driven bogie according to claim 6, characterized in that: An elastic support member (10) is connected between the middle frame (4.2) and the trolley drive device (3.1) for supporting the trolley drive device (3.1) and making the positioning wheel (3.2) contact the bottom surface of the track fixing seat (16).

8. The independent wheel idler rail driven bogie according to claim 2, characterized in that: The suspension assembly comprises a suspension rod (11) whose top is inserted into and fixed inside the bottom frame (4.3) and a pillow beam (12) fixed to the bottom of the suspension rod (11); a plurality of elastic support structures for supporting the suspension vehicle body are arranged on the top surface of the pillow beam (12).

9. The independent wheel idler rail driven bogie according to claim 2, characterized in that: The vehicle body vibration-damping connection structure comprises a vibration absorber (13) symmetrically connected to the left and right sides of the bottom frame (4.3), and a traction rod (14) connected to the front or rear of the bottom frame (4.3).

10. A connection structure of an independent wheel idler rail driven bogie according to any one of claims 1 to 9, comprising a rail (15) and a rail fixing seat (16), characterized in that: The track (15) is fixed to the top surface of the track fixing seat (16); the track (15) and the track fixing seat (16) are arranged in the track accommodating space (1); the independent wheel (2) is arranged on the track (15); and the top of the driving trolley (3) and the bottom surface of the track fixing seat (16) are arranged in a rolling manner.

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