Independent wheel sky rail driving bogie and connecting structure thereof

Abstract

The invention 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 invention relates to the technical field of rail transportation systems, and in particular to an independent wheel-empty rail-driven bogie and a connection structure thereof. Background Art

[0002] In my country's current transportation pattern, the development level of multimodal transport is at a low level, and road transport has long been dominant. This has led to the lack of smooth coordination between road, rail and water transport. At the same time, there are many imperfections in the market environment, and regulatory standards are difficult to adapt to actual needs, and the application of advanced technologies is lagging behind. In terms of container transportation, although it has been widely used in ports, logistics, coal and other freight fields, it often faces many difficulties in actual transportation. Since the distance between railway stations is often long and the surrounding environment in some areas is complex, it can only rely on a large number of container trucks for transshipment operations, which has caused a series of prominent problems such as congestion, pollution, inefficiency and safety hazards. Against this background, the freight system using aerial rail transportation has gradually come into people's view, and has attracted widespread attention from the market because it is expected to solve the above problems, showing a good market prospect.

[0003] The existing suspended monorail system, whether for passenger or freight transport, usually adopts the lower open rail beam system. Its vehicle running system mainly uses solid rubber wheels or pneumatic tires. This design enables the vehicle to have excellent vibration reduction performance during operation, which can provide a relatively comfortable transportation environment for passengers or goods, effectively reduce bumps and vibrations during transportation, and ensure the stability and safety of transportation.

[0004] However, the 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. The 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 for large volumes, high frequencies, long distances, and large ramps. In this case, the excessive 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 increases the overall cost of the project to a certain extent. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and provide an independent wheel-blade 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 empty rail driven bogie designed by the present invention includes a frame assembly, a track accommodating space is arranged in the middle of the frame assembly; a plurality of independent wheels fixed to the frame assembly and capable of rotating independently are arranged 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 a track fixing seat is arranged 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 reduction 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 reduction 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 with 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 to 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 to 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 bending portion that cooperates with a 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 with an axle box cover; at least one of the elastic support portions is fixed on the front and rear sides of the shaft cylinder, and comprises a guide column structure that is fixedly connected to the outer ring of the shaft cylinder and arranged perpendicular to the direction of the axle, 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 limiting plate, and an elastic connecting piece is coaxially arranged on the guide column structure, which is connected between the support fixing plate and the bottom limiting plate, and the support fixing plate can move relative to the bottom limiting 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 with 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 plurality of elastic support structures for supporting the suspension body are arranged on the top surface of the pillow beam.

[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 and 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 rolledly arranged 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 arranged on the upper part of the track accommodation space in the middle of the frame assembly of the present invention, and these independent wheels can rotate independently. During the empty rail driving process, when encountering a curve, a slope change or a 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 wheel 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 rail vehicle runs safely and smoothly on the complex track line. 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 accurately cooperate with the track, providing a stable installation and operation environment for the independent wheels and the drive trolley. The rational planning of the space ensures that each component will not be disturbed by the outside world when running on the track, and can achieve efficient power transmission and motion conversion in a limited space, thereby improving the overall performance and reliability of the bogie. The driving trolley at the bottom of the track accommodation space is fixed on the frame assembly and can walk along the bottom surface of the track fixing seat, and can drive the frame assembly to walk along the track through the independent wheel. This driving method adopts a unique layout. The driving trolley works with the independent wheel to effectively transmit the driving force to the entire bogie, so that the vehicle can obtain sufficient power to overcome the resistance during operation, such as air resistance, track friction, etc., to achieve various working conditions such as rapid start, acceleration, climbing and stable operation. The design of the driving trolley can flexibly adjust its driving power and torque output according to actual needs to adapt to different operating scenarios and vehicle load conditions, thereby improving the versatility and adaptability of the empty rail vehicle. At the same time, through a reasonable control strategy, the power distribution between the driving trolley and the independent wheel can be optimized, further improving energy utilization efficiency and reducing operating costs. The combination of independent wheels and driving trolleys forms an efficient drive system. The independent wheels are responsible for bearing the weight of the vehicle and realizing the steering function, while the drive trolley focuses on providing power. The two cooperate and complement each other, making the bogie run more smoothly and efficiently on the track. This coordinated drive mechanism can ensure that the vehicle maintains good power performance and handling performance during operation, improves the operating efficiency and reliability of the empty rail vehicle, and reduces parking accidents caused by power system failures. The suspension assembly fixed at the bottom of the frame assembly is used to carry the suspension body, which can effectively buffer and absorb various vibrations and shocks from the track and the vehicle during operation.Whether it is due to the slight unevenness of the track surface or the inertial force generated by the vehicle during dynamic processes such as acceleration, deceleration, and turning, the suspension assembly can be adjusted and attenuated through its elastic elements and damping devices to provide a relatively stable support environment for the suspended body, protect the body structure and internal equipment from damage, and extend the service life of the vehicle. The body vibration reduction connection structure connects the frame assembly and the suspended body, further enhancing the vehicle's vibration reduction performance. It can effectively isolate the vibration and noise transmitted from the bogie and reduce the risk of damage to the cargo. At the same time, during the operation of the vehicle, the body vibration reduction connection structure can also compensate for the relative displacement between the body and the bogie caused by factors such as track deformation and vehicle posture changes, ensuring that the connection between the two is always stable and reliable, improving the overall comfort and safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of an independent wheel idler rail driven bogie in the present invention;

[0018] Figure 2 It is a left side view of the independent wheel idler rail driving bogie of the present invention;

[0019] Figure 3 It is a front view of the track arrangement inside the independent wheel rail driving bogie of the present invention;

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

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

[0022] Figure 6 It is a front view of the independent wheel in the present invention;

[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—pillar beam, 13—shock absorber, 14—traction rod, 15—track, 16—track fixing seat, 17—car body support spring, 18—side roll stopper, 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 technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention.

[0026] like Figure 1 As shown in FIG. 7 , in certain embodiments, the independent wheel rail-driven bogie designed by the present invention comprises a frame assembly, wherein a track accommodating space 1 is arranged in the middle of the frame assembly; a plurality of independent wheels 2 fixed on the frame assembly and capable of rotating independently are arranged 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 on the frame assembly and capable of moving along the bottom surface of the track fixing seat 16 is arranged 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 carrying 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] Embodiment 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 to the top frame 4.1, a driving trolley 3 is fixed to the middle frame 4.2, a suspension assembly is fixed to the bottom frame 4.3, and a vehicle body vibration reduction connection structure is connected to the bottom frame 4.3.

[0029] Embodiment 2

[0030] On the basis of some embodiments or embodiment 1, the independent wheel mechanism is further optimized: Figure 5As shown in FIG. 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 movement of the bearing 5 along its axial direction. A shaft cylinder 22 is sleeved on the bearing 5, and one end of the shaft cylinder 22 is provided with a bending 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; an elastic supporting portion is fixed to the front and rear sides of the shaft cylinder 22, respectively, 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 arranged 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 column structure includes a guide column shaft box 26, which includes a bottom limit plate 9 and a guide column sleeve 27 vertically fixedly connected to the bottom limit plate 9, a guide column 24 is coaxially arranged in the guide column sleeve 27, and a support fixing plate 6 is fixedly connected to the top of the guide column 24. An elastic support ring 20 and a metal support ring 21 are coaxially sleeved on the guide column sleeve 27, and an elastic connector 25 is connected between the metal support ring 21 and the support fixing plate 6.

[0031] Embodiment 3

[0032] On the basis of the first or second embodiment, the structure of the driving trolley 3 is further optimized: the driving trolley 3 comprises a trolley driving device 3.1 and a plurality of positioning wheels 3.2 connected to and driven by the trolley driving device 3.1, and the positioning wheels 3.2 can move along the bottom surface of the track fixing seat 17. An elastic support member 10 for supporting the trolley driving device 3.1 and making the positioning wheels 3.2 contact the bottom surface of the track fixing seat 17 is connected between the middle frame 4.2 and the trolley driving device 3.1.

[0033] Embodiment 4

[0034] On the basis of the first embodiment or the second embodiment or the third embodiment, the structure of the suspension assembly is further optimized and designed: the suspension assembly includes 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, and a plurality of body support springs 17 for supporting the suspension body are arranged on the top surface of the pillow beam 12.

[0035] Embodiment 5

[0036] On the basis of the first embodiment or the second embodiment or the third embodiment or the fourth embodiment, the vehicle body vibration damping connection structure is further optimized: the vehicle body vibration damping connection structure includes a shock 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.

[0037] Embodiment 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-idling 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 and the bottom surface of the track fixing seat 16 are arranged to roll.

[0039] The bogie designed by the present invention adopts steel wheel system, and the wheel has long service life and low maintenance cost; it can adapt to the fully enclosed track beam structure, the track beam uses less steel, and the cost of the empty track system is lower; the driving trolley 3 is driven by a linear motor, which is not limited by the adhesion between the steel wheel and the track, breaking through the problem of insufficient climbing ability of traditional steel wheel vehicles; and the unsprung weight is small. The bogie is the running mechanism of the vehicle on the aerial track. The four independent wheels 2 are installed on the frame body 4 through elastic suspension. The frame body 4 suspends the bolster 12 and the car body support spring 17 through the suspension rod 11, and the car body support spring 17 bears the weight of the frame. The brake caliper is installed on the frame body 4, and the brake disc and the caliper provide adhesion braking force. The linear motor of the driving trolley 3 is suspended between the frame body 4 and the track fixing seat 16 through the elastic support member 10. The elastic support member 10 can ensure the air gap of the linear motor when the vehicle is running. The linear motor and the frame body 4 are fixedly connected in the horizontal and longitudinal directions through the tie rod. The side roll stopper 18 is installed at the bottom of the frame body 4 to prevent the car body from hard contact with the bogie. The shock absorber 13 and the traction rod 14 connect the bogie frame and the vehicle frame. The bogie designed by the present invention is powered by the driving trolley 3, so that the bogie can stably move along the track 15, and the car body under the suspension assembly carries the goods, meeting the rail transportation requirements of the goods.

[0040] In summary, a plurality of independent wheels are arranged on the upper part of the track accommodation space in the middle of the frame assembly of the present invention, and these independent wheels can rotate independently. During the empty track driving process, when encountering the curve, slope change 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 wheel 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 the complex track line. 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 accurately cooperate with the track, providing a stable installation and operation environment for the independent wheels and the driving trolley. The rational planning of the space ensures that each component will not be disturbed by the outside world when running on the track, and can achieve efficient power transmission and motion conversion in a limited space, thereby improving the overall performance and reliability of the bogie. The driving trolley at the bottom of the track accommodation space is fixed on the frame assembly and can walk along the bottom surface of the track fixing seat, and can drive the frame assembly to walk along the track through the independent wheel. This driving method adopts a unique layout. The driving trolley works with the independent wheel to effectively transmit the driving force to the entire bogie, so that the vehicle can obtain sufficient power to overcome the resistance during operation, such as air resistance, track friction, etc., to achieve various working conditions such as rapid start, acceleration, climbing and stable operation. The design of the driving trolley can flexibly adjust its driving power and torque output according to actual needs to adapt to different operating scenarios and vehicle load conditions, thereby improving the versatility and adaptability of the empty rail vehicle. At the same time, through a reasonable control strategy, the power distribution between the driving trolley and the independent wheel can be optimized, further improving energy utilization efficiency and reducing operating costs. The combination of independent wheels and driving trolleys forms an efficient drive system. The independent wheels are responsible for bearing the weight of the vehicle and realizing the steering function, while the drive trolley focuses on providing power. The two cooperate and complement each other, making the bogie run more smoothly and efficiently on the track. This coordinated drive mechanism can ensure that the vehicle maintains good power performance and handling performance during operation, improves the operating efficiency and reliability of the empty rail vehicle, and reduces parking accidents caused by power system failures. The suspension assembly fixed at the bottom of the frame assembly is used to carry the suspension body, which can effectively buffer and absorb various vibrations and shocks from the track and the vehicle during operation.Whether it is due to the slight unevenness of the track surface or the inertial force generated by the vehicle during dynamic processes such as acceleration, deceleration, and turning, the suspension assembly can be adjusted and attenuated through its elastic elements and damping devices to provide a relatively stable support environment for the suspended body, protect the body structure and internal equipment from damage, and extend the service life of the vehicle. The body vibration reduction connection structure connects the frame assembly and the suspended body, further enhancing the vehicle's vibration reduction performance. It can effectively isolate the vibration and noise transmitted from the bogie and reduce the risk of damage to the cargo. At the same time, during the operation of the vehicle, the body vibration reduction connection structure can also compensate for the relative displacement between the body and the bogie caused by factors such as track deformation and vehicle posture changes, ensuring that the connection between the two is always stable and reliable, improving the overall comfort and safety of the vehicle.

[0041] Finally, it should be pointed out that the above embodiments are only representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention should be considered to belong to the protection scope 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 arranged in the middle of the frame assembly; a plurality of independent wheels (2) fixed to the frame assembly and capable of rotating independently are arranged 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 arranged 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 suspension vehicle body is fixed to the lower part of the frame assembly; and a vehicle body vibration reduction connection structure for connecting the suspension 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), wherein the frame body (4) comprises 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 arranged 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), the two ends of the axle (2.2) are respectively coaxially connected with 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) and used to limit the axial movement of the bearing (5), the bearing (5) is sleeved and connected with an elastic support part, the elastic support part is arranged perpendicular to the axle (2.2), the top of the elastic support part is fixed with a support fixing plate (6), 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) which are coaxially connected to the axle (2.2) and are 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 bending portion (23) which 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), respectively, and includes a guide column structure which is 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 limiting plate (9); an elastic connecting member (25) is coaxially arranged on the guide column structure, which is connected between the support fixing plate (6) and the bottom limiting plate (9), and the support fixing plate (6) can move relative to the bottom limiting 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 driving device (3.1) and a plurality of positioning wheels (3.2) connected to the trolley driving device (3.1) and driven by the trolley driving device (3.1), wherein the positioning wheels (3.2) can move along the bottom surface of the track fixing seat (17).

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) and is used to support the trolley drive device (3.1) and enable the positioning wheel (3.2) to contact the bottom surface of the track fixing seat (17).

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 as claimed in 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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