CN117465227B - Passenger and cargo permanent magnet suspension transportation system driven by distributed wheel type permanent magnet motor - Google Patents

Abstract

The present invention discloses a passenger and freight permanent magnetic suspension transportation system driven by a distributed wheeled permanent magnetic motor, comprising: a sky beam, a bogie, a wheel motor and a permanent magnetic suspension pair, wherein the sky beam has an installation cavity, and the bogie is vertically suspended in the installation cavity by the suspension force generated by the permanent magnetic suspension pair; a wheel pair is provided on one side of the bogie, and the wheel pair only has a rotational freedom around a vertical axis relative to the bogie; the wheel pair always keeps in contact with the side wall of one side of the sky beam under the action of the offset force formed by the permanent magnetic suspension pair; the wheel motor is installed at the upper end of the bogie to drive the wheel pair to rotate. The present invention utilizes the lateral force generated by the misalignment of the track magnet and the vehicle-mounted magnet to make the bogie tilt to one side, and by arranging the wheel motor on the bogie on this side, the outer side of the wheel motor is wrapped with an inflatable tire, and under the action of the lateral force, the inflatable tire forms sufficient adhesion with the inner wall of the sky beam on this side to ensure that the bogie always only fits with one side of the inner wall of the sky beam.

Description

A distributed wheeled permanent magnet motor-driven passenger and cargo permanent magnetic suspension transportation system

Technical Field

The present invention relates to the technical field of rail transportation vehicles, and more particularly to a passenger and cargo permanent magnetic suspension transportation system driven by a distributed wheeled permanent magnetic motor.

Background Art

In the following discussion, "vertical" refers to the direction of gravitational acceleration, "longitudinal" refers to the forward direction, "lateral" refers to the horizontal direction perpendicular to the "vertical" and "longitudinal" directions, the on-board magnet refers to the magnetic group installed on the bogie, and the track magnet refers to the magnetic group installed on the sky beam.

Maglev trains are a new type of transportation that uses magnetism to overcome weight to suspend vehicles and uses a drive system to drive the vehicles under the guidance of magnetic force. There are mainly superconducting electric maglev trains, conventional electromagnetic attraction high-speed maglev trains, and conventional electromagnetic attraction medium and low-speed maglev trains. Currently, all maglev vehicles are driven by linear motors, and there is no related research or report on using rotary motors to drive maglev trains.

The permanent magnetic suspension track system uses guide wheels to limit the movement range of the bogie in the sky beam, and its traction is driven by a short stator linear induction motor to realize the operation of the vehicle.

Using linear motors to drive maglev trains can simplify the transmission system, but the driving efficiency of linear motors is much lower than that of rotary motors and they are expensive. Therefore, using rotary motors to drive maglev trains has great advantages. However, using ordinary rotary motor systems to drive maglev trains requires adding transmission systems, which increases system complexity. The advantage of wheeled motors is that they omit a large number of transmission components, are highly integrated, and have higher efficiency. Therefore, using wheeled rotary motors to drive maglev trains can improve transmission efficiency, omit the transmission system of ordinary rotary motors, and greatly simplify the drive system of existing maglev trains.

At present, all maglev train drive forms adopt linear motor drive. Figure 1 is a cross-sectional diagram of the red track, an engineering test line built by Jiangxi University of Science and Technology. The diagram only shows the structural diagram of suspension, guidance and traction.

The lower part of the bogie is equipped with a vehicle-mounted magnet, and the bottom of the sky beam is equipped with a track magnet, which form a permanent magnetic suspension pair to generate suspension force, allowing the bogie and vehicle system to be suspended at zero power.

A linear motor induction plate is installed on the supporting wall in the middle of the sky beam, and a linear motor coil is installed on the upper part of the bogie. After power is taken, an electromagnetic force is generated between the linear motor coil and the induction plate to drive the bogie to move. Under the action of the bogie guide wheel, the bogie moves along the inner wall of the sky beam.

In the prior art, linear motor drive is adopted. It is well known that the driving efficiency of linear motor is much lower than that of rotary motor. In the prior art, the primary and secondary of the linear motor are respectively installed on the bogie and the sky beam. In the vertical direction, due to the influence of light and heavy vehicles, the gap in this direction changes all the time, resulting in the gap between the two constantly changing, thereby causing unstable driving efficiency; in the lateral direction, since the bogie moves left and right on the inner wall of the sky beam, the overlap rate of the primary and secondary of the linear motor in the lateral direction keeps changing, further resulting in reduced driving efficiency.

In the prior art, the sky beam is an open structure at the lower end, and the track magnet is installed on the bottom support of the sky beam. When the bottom of the sky beam is subjected to force, the opening will be expanded to form an "eight" shape structure, further aggravating the uncertainty of the offset and relative position of the vehicle-mounted magnet and the track magnet, resulting in unstable vertical suspension force and affecting the smooth operation of the vehicle.

Summary of the invention

The purpose of the present invention is to provide a passenger and cargo permanent magnetic suspension transportation system driven by a distributed wheeled permanent magnetic motor, in order to solve the technical problems in the background technology.

In order to achieve the above object, the present invention adopts the following technical solutions:

A distributed wheeled permanent magnet motor-driven passenger and freight permanent magnet levitation transportation system comprises: a sky beam, a bogie, a wheeled motor and a permanent magnet levitation pair, wherein the sky beam has an installation cavity, and the bogie is vertically suspended in the installation cavity by the levitation force generated by the permanent magnet levitation pair; a wheeled pair is provided on one side of the bogie, and the wheeled pair has only a rotational degree of freedom around a vertical axis relative to the bogie; the wheeled pair always keeps in contact with the side wall of one side of the sky beam under the action of the offset force generated by the permanent magnet levitation pair; the wheeled motor is installed at the upper end of the bogie to drive the wheeled pair to rotate.

In some embodiments, the wheelset includes an upper driving wheel, a connecting shaft and a lower driven wheel, wherein the connecting shaft is installed on the bogie through an axle box, and the connecting shaft only has rotational freedom around a vertical axis relative to the bogie; the wheel motor and the lower driven wheel are installed at the upper and lower ends of the rotating shaft; the upper driving wheel is installed on the outside of the wheel motor; the upper driving wheel, the lower driven wheel and the connecting shaft have exactly the same rotational speed around the vertical axis relative to the bogie.

In some embodiments, the upper driving wheel and the lower driven wheel are both pneumatic tires.

In some embodiments, the permanent magnetic suspension pair is composed of vehicle-mounted magnets and track magnets, the vehicle-mounted magnets include left-side vehicle-mounted magnets and right-side vehicle-mounted magnets, the track magnets include left-side track magnets and right-side track magnets, the left-side vehicle-mounted magnets and the right-side track magnets are arranged on the bogie, the left-side track magnets and the right-side track magnets are arranged on the sky beam, and the left-side vehicle-mounted magnets and the left-side track magnets as well as the right-side vehicle-mounted magnets and the right-side track magnets are all staggered and offset, so that the lateral deviation force generated by the left-side vehicle-mounted magnet and the left-side track magnet and the lateral deviation force generated by the right-side vehicle-mounted magnet and the right-side track magnet are both toward the side where the upper drive wheel is provided.

In some embodiments, support platforms arranged horizontally facing each other are respectively provided on the left and right side walls of the installation cavity, wherein the left support platform is used to install the left track magnet, and the right support platform is used to install the right track magnet.

In some embodiments, the bogie has an upper top surface and a lower bottom surface, which are respectively arranged on the upper and lower sides of the support platform, wherein the left vehicle-mounted magnet is arranged on the left side of the lower part of the upper top surface, and the right vehicle-mounted magnet is arranged on the right side of the lower part of the upper top surface.

In some embodiments, the axle box is mounted on a tie spring, and a tie spring is fixed to the bogie.

In some embodiments, a driven wheel system is also included, which is arranged on the right side of the bogie and is symmetrically arranged up and down. The driven wheel system includes a hydraulic cylinder, a guide rail, a slider, and a second driven wheel. The hydraulic cylinder is fixed on the bogie, the guide rail is fixed on the bogie, and the second driven wheel is installed on the slider. The slider is connected to the piston rod of the hydraulic cylinder, and the slider can slide back and forth on the guide rail under the push of the hydraulic cylinder.

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

The present invention utilizes the lateral force generated by the misalignment of the track magnet and the vehicle-mounted magnet to make the bogie deviate to one side, and arranges a wheel motor on the bogie on this side, and the outer side of the wheel motor is wrapped with an inflatable tire. Under the action of the lateral force, the inflatable tire forms sufficient adhesion with the inner wall of the sky beam on this side to ensure that the bogie is always in contact with only one side of the inner wall of the sky beam. When the wheel motor provides power, the bogie is driven to run along the inner wall of the sky beam, thereby stabilizing the running track of the bogie and improving the stability of the operation of the suspended sky rail vehicle.

When passing a curve where the centrifugal force offsets the adhesion, when the adhesion is insufficient under extreme weather conditions, or when emergency braking is required, the hydraulic mechanism pushes the second driven wheel to fit against the side wall of the track beam to increase the pressure, ensuring that the drive wheel has sufficient adhesion and allowing the vehicle to move smoothly.

During normal operation and other working conditions, the second driven wheel leaves the track beam wall under the action of the hydraulic cylinder and relies on the side force generated by the misalignment of the magnet to provide adhesion, thereby reducing rolling resistance, improving traction efficiency and reducing tire wear.

The present invention replaces the linear motor with a wheel motor. When the wheel motor provides power, the bogie is driven to run along the inner wall of the sky beam, which stabilizes the running track of the bogie and improves the running stability of the suspended sky rail vehicle. The structure of the suspended sky rail drive system is greatly simplified, and the driving efficiency of the entire system is greatly improved. By arranging a simple hydraulic system, adhesion is provided according to the working conditions, ensuring the safety and stability of the operation.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a bogie in the prior art;

FIG2 is a forward schematic diagram of a passenger and cargo permanent magnetic levitation transportation system driven by a distributed wheeled permanent magnet motor of the present application.

FIG3 is a side schematic diagram of the passenger and cargo permanent magnetic levitation transportation system driven by the distributed wheeled permanent magnet motor of the present application.

FIG4 is a schematic diagram of the operation of the passenger and cargo permanent magnetic levitation transportation system driven by the distributed wheeled permanent magnet motor of the present application under extreme working conditions.

FIG5 is a forward schematic diagram of a passenger and cargo permanent magnetic levitation transportation system driven by a distributed wheeled permanent magnet motor according to Example 2.

DETAILED DESCRIPTION

In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

The embodiments of the present application are described in detail below with reference to the accompanying drawings.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

A distributed wheeled permanent magnet motor driven passenger and cargo permanent magnet levitation transportation system according to an embodiment of the present application will be described in detail below in conjunction with Figure 2. It should be noted that the following embodiments are only used to explain the present application and do not constitute a limitation on the present application.

Embodiment 1:

As shown in Figure 2-3, a distributed wheeled permanent magnet motor-driven permanent magnet levitation transportation system for passengers and cargo includes: a sky beam 1, a bogie 2, a wheel motor 8 and a permanent magnet levitation pair, wherein the sky beam has an installation cavity, and the bogie is vertically suspended in the installation cavity by the levitation force generated by the permanent magnet levitation pair; a wheelset is provided on one side of the bogie, and the wheelset has only a rotational degree of freedom around the vertical axis relative to the bogie; the wheelset always keeps in contact with the side wall of one side of the sky beam under the action of the offset force generated by the permanent magnet levitation pair; the wheel motor is installed at the upper end of the bogie, and the wheel motor has driving and braking functions, which is used to drive the wheelset to rotate and to brake when parking is required.

The technical solution of the present application realizes "turning harm into advantage" by utilizing the lateral force generated by the misalignment of the track magnet and the vehicle-mounted magnet, so that the guide wheel always only fits one side of the inner wall of the sky beam. The lateral force generated by the misalignment of the track magnet and the vehicle-mounted magnet is utilized to make the bogie tilt to one side, and by arranging a wheel motor on the bogie on this side, the wheel motor is wrapped with an inflatable tire on the outside, and under the action of the lateral force, the inflatable tire forms sufficient adhesion with the inner wall of the sky beam on this side, so as to ensure that the bogie always only fits one side of the inner wall of the sky beam, and when the wheel motor provides power, the bogie is driven to run along the inner wall of the sky beam, thereby stabilizing the running track of the bogie and improving the stability of the operation of the suspended sky rail vehicle.

Referring to Fig. 2, the wheelset comprises an upper driving wheel 5, a connecting shaft 9 and a lower driven wheel 10. The connecting shaft is mounted on the bogie via an axle box 7. The axle box is mounted on a tie spring 6, which is fixed to the bogie. The installation of a tie spring can further reduce the vibration generated by the contact between the upper driving wheel and the lower driven wheel and the sky beam.

The connecting shaft has only the degree of freedom of rotation around the vertical axis relative to the bogie; the wheel motor and the lower driven wheel are installed at the upper and lower ends of the rotating shaft; the upper drive wheel is installed outside the wheel motor; the upper drive wheel, the lower driven wheel and the connecting shaft rotate around the vertical axis relative to the bogie in exactly the same way. The lower driven wheel is composed of an inflatable tire, and only the wheel motor at the upper end provides power, and the lower driven wheel at the lower end only serves as a driven wheel, thereby ensuring that the upper drive wheel and the lower driven wheel always have the same speed, which can prevent tire slippage.

Wherein, the upper driving wheel and the lower driven wheel are both pneumatic tires. Under the action of the lateral force, the pneumatic tires will form a stable adhesion force on the inner wall of the sky beam, and driven by the wheel motor, the bogie will be driven to travel stably.

In some embodiments, the permanent magnetic suspension pair is composed of a vehicle-mounted magnet and a track magnet, the vehicle-mounted magnet includes a left vehicle-mounted magnet 3 and a right vehicle-mounted magnet 11, the track magnet includes a left track magnet 4 and a right track magnet 12, the left vehicle-mounted magnet and the right vehicle-mounted magnet are arranged on the bogie, the left track magnet and the right track magnet are arranged on the sky beam, and the left vehicle-mounted magnet and the left track magnet as well as the right vehicle-mounted magnet and the right track magnet are all arranged in an offset manner, so that the lateral force generated by the left vehicle-mounted magnet and the left track magnet and the lateral force generated by the right vehicle-mounted magnet and the right track magnet are all toward the side where the upper drive wheel is provided. And the position and angle are adjustable, and the relative position of the vehicle-mounted magnet and the track magnet can be changed by adjustment.

The on-board magnets and the track magnets form a permanent magnetic suspension pair, which can generate a vertical suspension force. Since the on-board magnets are offset to the left relative to the center of the track magnets, the permanent magnetic suspension pair generates a lateral force to the left, causing the bogie to be subjected to an external force to the left. Under the action of this lateral force, the bogie will tend to deviate to the left.

The left and right side walls of the installation cavity are respectively provided with support platforms arranged horizontally facing each other, wherein the left support platform is used to install the left track magnet, and the right support platform is used to install the right track magnet. The bogie has an upper top surface and a lower bottom surface, and the upper top surface and the lower bottom surface are respectively arranged on the upper and lower sides of the support platform, wherein the left vehicle-mounted magnet is arranged on the left side of the lower part of the upper top surface, and the right vehicle-mounted magnet is arranged on the right side of the lower part of the upper top surface.

In the present application, the track magnet can be installed on the supporting rib plate in the middle of the sky beam, which greatly improves the stress condition of the sky beam.

Under the action of the lateral force, the bogie will always run to the left along the inner wall of the sky beam, with a stable running track, which can prevent the bogie from shaking back and forth on the inner wall of the sky beam and causing impact, thereby improving the stability of vehicle operation.

The on-board magnet and the track magnet form a permanent magnetic suspension pair. During installation, the former is offset to the left relative to the center of the latter. According to the characteristics of permanent magnetic suspension, the suspension pair will generate a vertical upward suspension force and a leftward lateral force. Under the action of the lateral force, the bogie will stick to the left inner wall of the sky beam as a whole, and the upper driving wheel and the lower driven wheel on the bogie will always stick to the left inner wall of the sky beam. The magnitude of the lateral force can be achieved by changing the offset between the on-board magnet and the center of the track magnetic track, and the magnitude of the lateral force must meet the requirements of traction and braking.

Using wheel motors to replace the linear motors in the original technical solution as drive units can greatly improve drive efficiency; a wheelset has only one active wheel, that is, one bogie is arranged with two wheel motors. During operation, the number of running motors can be controlled according to the line, load and speed conditions, thereby achieving the purpose of energy saving and consumption reduction.

The present invention utilizes the cornering force generated by the misalignment of the track magnet and the vehicle-mounted magnet to provide tire adhesion. The structure is simple, and the magnitude of the adhesion only needs to meet the basic requirements of traction and braking, which can greatly reduce tire wear. Moreover, the force only needs to be controlled by the misalignment of the magnets, and the adjustment method is simple and reliable.

As shown in FIG4 , in order to increase the pressure by pushing the driven wheel to fit the side wall of the track beam when the centrifugal force offsets the adhesion force, when the adhesion force is insufficient under extreme weather conditions, or when emergency braking is required, the hydraulic mechanism is used to push the driven wheel to fit the side wall of the track beam to ensure that the driving wheel has sufficient adhesion force and the vehicle can run smoothly. This embodiment also includes a driven wheel system, which is arranged on the right side of the bogie and is arranged symmetrically up and down. The driven wheel system includes a hydraulic cylinder 13, a guide rail 14, a slider 15, and a second driven wheel 16. The size of the second driven wheel can be the same as that of the driven wheel 10 or different. The hydraulic cylinder is fixed on the bogie, the guide rail is fixed on the bogie, and the second driven wheel is installed on the slider. The slider is connected to the piston rod of the hydraulic cylinder, and the slider can slide back and forth on the guide rail under the push of the hydraulic cylinder.

The driven wheel system is arranged symmetrically up and down on the bogie, and the upper and lower hydraulic cylinders work in a linked and synchronous manner, which can ensure that the upper and lower hydraulic cylinders can contact or leave the skylight track at the same time and with the same pressure.

The beam 1 can increase the roughness of the tire running surface in the inner cavity of the beam 1 and improve the friction coefficient by adopting surface shot peening or surface plastic coating treatment to ensure the driving effect.

The present invention replaces the linear motor with a wheel motor, greatly simplifies the structure of the suspended sky rail driving system, and greatly improves the driving efficiency of the entire system.

Embodiment 2:

As shown in Figure 5, a distributed wheeled permanent magnet motor-driven passenger and cargo permanent magnet levitation transportation system includes: a sky beam 1, a bogie 2, a wheel motor 8 and a permanent magnet levitation pair. The sky beam has an installation cavity, and the bogie is vertically suspended in the installation cavity by the levitation force generated by the permanent magnet levitation pair; the wheel motor 8 is respectively installed on the upper and bottom of the left side of the bogie, and can rotate around the central axis of the motor, and the pneumatic tire is installed on the outside of the wheel motor.

The main difference between this embodiment and embodiment 1 is that wheel motors are installed on both the upper and lower sides of the bogie, that is, both are driving wheels.

The wheel motor has driving and braking functions, and is used to drive the wheelset to rotate and to brake when parking is required.

Under the control system, the upper and lower wheel motors of the bogie can achieve synchronization and speed, thereby ensuring that the upper and lower pneumatic tires always have the same speed and preventing tire slippage.

During operation, the number of running motors can be controlled according to the line, load and speed conditions to achieve energy saving and consumption reduction.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A distributed wheeled permanent magnet motor driven passenger and freight permanent magnet levitation transportation system, characterized in that it comprises: a sky beam, a bogie, a wheeled motor and a permanent magnet levitation pair, wherein the sky beam has an installation cavity, and the bogie is vertically suspended in the installation cavity by the levitation force generated by the permanent magnet levitation pair; a wheeled pair is provided on one side of the bogie and is arranged through, and the wheeled pair has only a rotational degree of freedom around a vertical axis relative to the bogie; the wheeled pair always keeps in contact with the side wall of one side of the sky beam under the action of the offset force generated by the permanent magnet levitation pair; the wheeled motor is installed at the upper end of the bogie to drive the wheeled pair to rotate; The wheelset comprises an upper driving wheel, a connecting shaft and a lower driven wheel, wherein the connecting shaft is mounted on the bogie via an axle box, and the connecting shaft has only a rotational freedom around a vertical axis relative to the bogie; the wheel motor and the lower driven wheel are mounted at the upper and lower ends of the rotating shaft; the upper driving wheel is mounted outside the wheel motor; the upper driving wheel, the lower driven wheel and the connecting shaft rotate around the vertical axis in exactly the same manner relative to the bogie; The upper driving wheel and the lower driven wheel are both pneumatic tires; It also includes a driven wheel system, which is arranged on the right side of the bogie and is symmetrically arranged in an upper and lower manner. The driven wheel system includes a hydraulic cylinder, a guide rail, a slider, and a second driven wheel. The hydraulic cylinder is fixed on the bogie, the guide rail is fixed on the bogie, the second driven wheel is installed on the slider, the slider is connected to the piston rod of the hydraulic cylinder, and the slider can slide back and forth on the guide rail under the push of the hydraulic cylinder. 2. A distributed wheeled permanent magnet motor-driven passenger and freight permanent magnet levitation transportation system according to claim 1, characterized in that the permanent magnet levitation pair is composed of vehicle-mounted magnets and track magnets, the vehicle-mounted magnets include left-side vehicle-mounted magnets and right-side vehicle-mounted magnets, the track magnets include left-side track magnets and right-side track magnets, the left-side vehicle-mounted magnets and the right-side track magnets are arranged on the bogie, the left-side track magnets and the right-side track magnets are arranged on the sky beam, and the left-side vehicle-mounted magnets and the left-side track magnets as well as the right-side vehicle-mounted magnets and the right-side track magnets are all staggered and offset, so that the lateral force generated by the left-side vehicle-mounted magnets and the left-side track magnets and the lateral force generated by the right-side vehicle-mounted magnets and the right-side track magnets are both toward the side where the upper driving wheel is provided. 3. According to claim 2, a distributed wheeled permanent magnet motor-driven passenger and cargo permanent magnet levitation transportation system is characterized in that support platforms arranged horizontally facing each other are respectively provided on the left and right side walls of the installation cavity, wherein the support platform on the left is used to install the left track magnet, and the support platform on the right is used to install the right track magnet. 4. According to claim 3, a distributed wheeled permanent magnet motor-driven passenger and cargo permanent magnetic levitation transportation system is characterized in that the bogie has an upper top surface and a lower bottom surface, and the upper top surface and the lower bottom surface are respectively arranged on the upper and lower sides of the support platform, wherein the left-side vehicle-mounted magnet is arranged on the left side of the lower part of the upper top surface, and the right-side vehicle-mounted magnet is arranged on the right side of the lower part of the upper top surface. 5. According to a distributed wheeled permanent magnet motor driven passenger and cargo permanent magnet levitation transportation system as described in claim 1, it is characterized in that the axle box is installed on a tie spring, and a tie spring is fixed on the bogie.