阅读说明：本技术 一种用于磁浮线路养护车辆的单轴转向架 (Single-shaft bogie for magnetic suspension line maintenance vehicle ) 是由 罗建利 吴会超 李新泉 张亚雄 卢权 赵建希 朱震寰 于 2021-07-29 设计创作，主要内容包括：本发明提供一种用于磁浮线路养护车辆的单轴转向架,包括构架、驱动车桥、一系悬挂机构、二系悬挂机构、导向机构和走行轮；所述驱动车桥包括双向驱动的牵引电机；所述一系悬挂机构用于连接驱动车桥和构架,且一系悬挂机构包括一系弹簧；所述二系悬挂机构用于连接构架和车体,且二系悬挂机构包括二系弹簧、平衡拉杆组件和牵引拉杆组件；所述导向机构设有多组,单组导向机构包括导向轮支架和导向轮组件。本发明采用模块化设计、永磁同步电机驱动、两级悬挂机构进行减振、大载重实心橡胶走行轮设计,使该单轴转向架具有成本低、结构简单、维护方便、安全性高、运行性能及乘坐舒适性均优良的特点。(The invention provides a single-axle bogie for a magnetic suspension line maintenance vehicle, which comprises a framework, a driving axle, a primary suspension mechanism, a secondary suspension mechanism, a guide mechanism and traveling wheels, wherein the driving axle is arranged on the framework; the driving axle comprises a traction motor driven in two directions; the primary suspension mechanism is used for connecting the driving axle and the framework and comprises a spring; the secondary suspension mechanism is used for connecting the framework and the vehicle body and comprises a secondary spring, a balance pull rod assembly and a traction pull rod assembly; the guide mechanism is provided with a plurality of groups, and the single group of guide mechanism comprises a guide wheel bracket and a guide wheel component. The single-axle bogie has the characteristics of low cost, simple structure, convenience in maintenance, high safety, excellent running performance and riding comfort.)

1. The utility model provides a unipolar bogie for maglev circuit maintenance vehicle which characterized in that: the device comprises a framework, a driving axle, a primary suspension mechanism, a secondary suspension mechanism, a guide mechanism and a traveling wheel;

the driving axle comprises a traction motor, the traction motor adopts a bidirectional driving motor, and two ends of a bidirectional driving shaft of the traction motor are respectively connected with corresponding walking wheels;

the primary suspension mechanism is connected with the driving axle and the framework and comprises a primary spring;

the secondary suspension mechanism is connected with the framework and the vehicle body and comprises a secondary spring, a balance pull rod assembly and a traction pull rod assembly, and the secondary spring is connected with the framework and the vehicle body in a vertical mode; the balance pull rod assemblies are arranged in at least one group, and the balance pull rod assemblies in the same group are symmetrically arranged relative to the longitudinal central axis of the framework; the traction pull rod assemblies are at least one group, the traction pull rod assemblies in the same group are symmetrically arranged relative to the transverse central axis of the framework, and the balance pull rod assembly and the traction pull rod assemblies act together to transfer longitudinal traction and inhibit nodding movement between the single-axle bogie and the vehicle body;

the guide mechanism comprises a guide wheel support and a guide wheel assembly, one end of the guide wheel support is fixedly connected with the framework, the other end of the guide wheel support is provided with the guide wheel assembly, and the guide wheel in the guide wheel assembly rolls along the outer side face of the magnetic levitation track to realize guiding.

2. The single axle bogie of claim 1, wherein: the driving axle further comprises a brake, one end of the brake is connected with the traction motor, the other end of the brake is connected with the traveling wheels through a connecting flange, and the connecting flange is provided with a plurality of parts with different thicknesses.

3. The single axle bogie of claim 1, wherein: the running wheel comprises a steel rim and a solid rubber tread.

4. The single axle bogie of claim 1, wherein: the balance pull rod assembly comprises a first rod seat and a first pull rod, the first rod seat is fixedly connected with the framework, and a first mounting hole for mounting the first pull rod is formed in the first rod seat; rubber nodes are arranged at two ends of the first pull rod;

the traction pull rod assembly comprises a second rod seat and a second pull rod; the second rod seat is fixedly connected with the framework, and a second mounting hole for mounting a second pull rod is formed in the second rod seat; rubber nodes are arranged at the two ends of the second pull rod;

the rubber node is used for being connected with a vehicle body.

5. The single axle bogie of claim 1, wherein: the secondary suspension mechanism further comprises a transverse shock absorber for connecting the framework and the vehicle body; the transverse vibration absorber is provided with two transverse vibration absorbers which are arranged in an anti-symmetric mode.

6. The single axle bogie of claim 5, wherein: the secondary suspension mechanism further comprises at least one group of transverse stopping blocks, and the two transverse stopping blocks in the same group are symmetrically arranged along the longitudinal central axis and used for limiting the transverse displacement of the vehicle body in the process of passing through a curve.

7. The single axle bogie of claim 6, wherein: the transverse stop is arranged in an L-shaped structure.

8. The single axle bogie of claim 1, wherein: the guide wheel bracket comprises an upper support and a lower support which are arranged up and down, the upper support is fixedly connected with the framework, the lower support is rotatably connected with the upper support, and the guide wheel assembly is arranged on the lower support;

the guide mechanism further comprises a screw, a compression spring and a spring sleeve; one end of the screw is rotatably connected with the upper support, the other end of the screw is connected with the lower support, and a nut is arranged on the screw; the compression spring is sleeved on the screw rod, one end of the compression spring is connected with the spring sleeve, and the other end of the compression spring is connected with the lower support; one end of the spring sleeve is in contact connection with the nut, and a gap is formed between the other end of the spring sleeve and the lower support.

9. The single axle bogie of claim 8, wherein: the lower support is further provided with a safety wheel assembly, the safety wheel assembly comprises a safety wheel and a second connecting shaft, the safety wheel is connected with the extending end of the lower support through the second connecting shaft and is positioned right below the outer magnetic pole surface of the F rail in the magnetic levitation track, and a gap is formed between the safety wheel and the F rail in the magnetic levitation track.

10. The single-axle bogie according to any of claims 1 to 9, wherein: the primary spring is one of a spiral steel spring, a conical rubber spring or a laminated rubber spring;

the secondary spring is one of an hourglass rubber spring, a laminated rubber spring, a spiral steel spring or an air spring;

the traction motor is a permanent magnet synchronous motor;

the brake is a disc brake or a disc brake.

Technical Field

The invention belongs to the technical field of novel track traffic line maintenance equipment, and particularly relates to a single-axle bogie for a magnetic suspension line maintenance vehicle.

Background

The medium-low speed magnetic levitation transportation has the characteristics of large freedom degree of route selection, small noise, comfort, low operation and maintenance cost and the like, and is an urban rail transportation mode with great development potential. At present, two shafts, three shafts or four shafts are mainly used as a bogie for a magnetic suspension line maintenance vehicle, hydraulic and motor driving is mainly used as a driving mode, rigid guiding is mainly used as a guiding mechanism, and the bogie has the defects of high cost, high vibration noise, limited curve passing capacity, complex structure, inconvenient maintenance and the like.

Disclosure of Invention

The invention aims to provide a single-axle bogie for a magnetic suspension line maintenance vehicle, which aims to solve the problems in the prior art.

In order to achieve the aim, the invention provides a single-axle bogie for a magnetic suspension line maintenance vehicle, which comprises a framework, a driving axle, a primary suspension mechanism, a secondary suspension mechanism, a guide mechanism and traveling wheels, wherein the driving axle is arranged on the framework; the driving axle comprises a traction motor, the traction motor adopts a bidirectional driving motor, and two ends of a bidirectional driving shaft of the traction motor are respectively connected with corresponding walking wheels; the primary suspension mechanism is connected with the driving axle and the framework and comprises a primary spring; the secondary suspension mechanism is connected with the framework and the vehicle body and comprises a secondary spring, a balance pull rod assembly and a traction pull rod assembly, and the secondary spring is connected with the framework and the vehicle body in a vertical mode; the balance pull rod assemblies are arranged in at least one group, and the balance pull rod assemblies in the same group are symmetrically arranged relative to the longitudinal central axis of the framework; the traction pull rod assemblies are at least one group, the traction pull rod assemblies in the same group are symmetrically arranged relative to the transverse central axis of the framework, and the balance pull rod assembly and the traction pull rod assemblies act together to transfer longitudinal traction and inhibit nodding movement between the single-axle bogie and the vehicle body; the guide mechanism comprises a guide wheel support and a guide wheel assembly, one end of the guide wheel support is fixedly connected with the framework, the other end of the guide wheel support is provided with the guide wheel assembly, and the guide wheel in the guide wheel assembly rolls along the outer side face of the magnetic levitation track to realize guiding.

Preferably, the driving axle further comprises a brake, one end of the brake is connected with the traction motor, the other end of the brake is connected with the traveling wheels through a connecting flange, and the connecting flange is provided with a plurality of parts with different thicknesses.

Preferably, the running wheel comprises a steel rim and a solid rubber tread.

The balance pull rod assembly comprises a first rod seat and a first pull rod, the first rod seat is fixedly connected with the framework, and a first mounting hole for mounting the first pull rod is formed in the first rod seat; rubber nodes are arranged at two ends of the first pull rod; the rubber node is used for being connected with a vehicle body

The traction pull rod assembly comprises a second rod seat and a second pull rod; the second rod seat is fixedly connected with the framework, and a second mounting hole for mounting a second pull rod is formed in the second rod seat; rubber nodes are arranged at the two ends of the second pull rod; the rubber node is used for being connected with a vehicle body

As a further aspect of the present invention, the secondary suspension mechanism further includes a transverse damper for connecting the frame and the vehicle body; the transverse vibration absorber is provided with two transverse vibration absorbers which are arranged in an anti-symmetric mode.

As a further scheme of the invention, the secondary suspension mechanism further comprises at least one group of transverse stopping blocks, and the two transverse stopping blocks in the same group are symmetrically arranged along the longitudinal central axis and used for limiting the transverse displacement of the vehicle body in the process of passing through a curve.

Preferably, the lateral stops are provided as L-shaped structures.

The guide wheel support comprises an upper support and a lower support which are arranged up and down, the upper support is fixedly connected with the framework, the lower support is rotatably connected with the upper support, and the guide wheel assembly is arranged on the lower support.

As a further aspect of the present invention, the guiding mechanism further comprises a screw, a compression spring and a spring sleeve; one end of the screw is rotatably connected with the upper support, the other end of the screw is connected with the lower support, and a nut is arranged on the screw; the compression spring is sleeved on the screw rod, one end of the compression spring is connected with the spring sleeve, and the other end of the compression spring is connected with the lower support; one end of the spring sleeve is in contact connection with the nut, and a gap is formed between the other end of the spring sleeve and the lower support.

As a further scheme of the invention, the lower support is also provided with a safety wheel assembly, the safety wheel assembly comprises a safety wheel and a second connecting shaft, the safety wheel is connected with the extending end of the lower support through the second connecting shaft and is positioned right below the outer magnetic pole surface of the F rail in the magnetic levitation track, and a gap is formed between the safety wheel and the F rail in the magnetic levitation track.

Preferably, the series of springs is one of a spiral steel spring, a conical rubber spring or a laminated rubber spring.

Preferably, the secondary spring is one of an hourglass rubber spring, a laminated rubber spring, a spiral steel spring or an air spring.

Preferably, the traction motor is a permanent magnet synchronous motor.

Preferably, the brake is a disc brake or a disc brake.

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

the single-axle bogie has the characteristics of low cost, simple structure, convenience in maintenance, high safety, excellent running performance and riding comfort.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is an axial schematic view of the overall construction of a single axle bogie in an embodiment of the invention;

FIG. 2 is an axial schematic view of the frame of FIG. 1;

FIG. 3 is an axle schematic view of the drive axle of FIG. 1 coupled to a primary suspension mechanism;

FIG. 4 is an axial schematic view of the single guide mechanism of FIG. 1;

FIG. 5 is a schematic diagram of a single axle bogie coupled to a magnetic levitation track according to an embodiment of the present invention.

Wherein:

1. a framework 1-1, a first U-shaped frame 1-2, a second U-shaped frame 1-3, a first beam 1-4, a second beam 2, a driving axle 2-1, a traction motor 2-2, a brake 2-3, a connecting flange 2-4, an axle box mounting seat 3, a primary suspension mechanism 3-1, an axle box body 3-2, a primary spring 4, a secondary suspension mechanism 4-1, a secondary spring 4-2, a transverse shock absorber 4-3, a balance pull rod assembly 4-4, a traction pull rod assembly 4-5, a transverse stop 5, a guide mechanism 5-1, an upper support seat 5-2, a lower support seat 5-3, a transmission pin 5-4, a screw rod 5-5 and a compression spring, 5-6 parts of guide wheel assembly, 5-7 parts of safety wheel assembly, 6 parts of walking wheel, 100 parts of magnetic levitation track, 101 parts of F track.

Detailed Description

In order to make the aforementioned objects, features, advantages, and the like of the present invention more clearly understandable, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the drawings of the present invention are simplified and are not to precise scale, and are provided for convenience and clarity in assisting the description of the embodiments of the present invention; the several references in this disclosure are not limited to the particular numbers in the examples of the figures; the directions or positional relationships indicated by ' front ' middle, ' rear ' left ', right ', upper ', lower ', top ', bottom ', middle ', etc. in the present invention are based on the directions or positional relationships shown in the drawings of the present invention, and do not indicate or imply that the devices or components referred to must have a specific direction, nor should be construed as limiting the present invention.

Example (b):

referring to fig. 1 to 5, the single-axle bogie for a magnetic levitation line maintenance vehicle provided by the invention comprises a framework 1, a driving axle 2, a primary suspension mechanism 3, a secondary suspension mechanism 4, a guide mechanism 5 and running wheels 6.

The framework 1 comprises a first U-shaped frame 1-1, a first cross beam 1-3, a second cross beam 1-4 and a second U-shaped frame 1-2, wherein the open end of the first U-shaped frame 1-1 freely extends leftwards, the closed end of the first U-shaped frame 1-1 is fixedly connected with one end of the first cross beam 1-3 and one end of the second cross beam 1-4, the open end of the second U-shaped frame 1-2 freely extends rightwards, the closed end of the second U-shaped frame 1-2 is fixedly connected with the other end of the first cross beam 1-3 and the other end of the second cross beam 1-4, and the first cross beam 1-3 and the second cross beam 1-4 are arranged at intervals to form a cavity structure.

The driving axle 2 comprises a traction motor 2-1, a brake 2-2, a connecting flange 2-3 and an axle box mounting seat 2-4, the traction motor 2-1 is preferably a bidirectional driving motor, brakes 2-2 are respectively mounted on bidirectional driving shafts of the traction motor 2-1, and the two brakes 2-2 are respectively connected with corresponding travelling wheels 6 through the connecting flanges 2-3 to drive the two travelling wheels 2-6 to synchronously rotate so as to drive the two travelling wheels 2-6; the axle box mounting seats 2-4 are respectively erected between the traction motor 2-1 and the brake 2-2, and the two axle box mounting seats 2-4 are fixedly connected with the shell of the driving axle 2 through bolts.

Preferably, the traction motor 2-1 is a permanent magnet synchronous motor.

Preferably, the brake 2-2 is a drum brake or a disc brake.

As a further embodiment of the present invention, in order to increase the applicable scope of the single-axle bogie, the connecting flange 2-3 is provided with several pieces with different thicknesses, so that the single-axle bogie can adapt to magnetic levitation lines with different gauges, such as 1860mm and 2000mm, by installing (or replacing) the connecting flange 2-3 with different thicknesses.

The primary suspension mechanism 3 comprises a shaft box body 3-1 and a primary spring 3-2, the shaft box body 3-1 is provided with two shaft boxes which are respectively connected with the two shaft box installation seats 2-4 through bolts, and the two shaft box bodies 3-1 are respectively provided with a connecting shaft for sleeving the primary spring 3-2; two connecting shafts on the same axle box body 3-1 are symmetrically arranged along a transverse central axis (the transverse central axis is a central axis vertical to the advancing direction of the single-axle bogie), a series of springs 3-2 are sleeved on the connecting shafts, and one series of vibration reduction of the single-axle bogie is realized through the series of springs 3-2.

Preferably, two ends of each primary spring 3-2 are fixedly connected with the closed ends of the first U-shaped frame 1-1 or the second U-shaped frame 1-2 of the axle box body 3-1 and the framework 1 respectively so as to fix the primary spring 3-2.

Preferably, the primary spring 3-2 is one of a spiral steel spring, a conical rubber spring and a laminated rubber spring with high vertical stiffness, and the dynamic deflection of the selected primary spring 3-2 is smaller than 5mm through calculation so as to ensure the safety and the vibration damping effect.

The secondary suspension mechanism 4 comprises a secondary spring 4-1, a transverse shock absorber 4-2, a vertical shock absorber (not marked), a balance pull rod assembly 4-3, a traction pull rod assembly 4-4 and a transverse stopper 4-5; the secondary spring 4-1 is preferably provided with two secondary springs 4-1, the two secondary springs 4-1 are connected with the framework 1 and the vehicle body in a vertical mode (specifically, one end of each of the two secondary springs 4-1 is fixedly connected with the closed end of the first U-shaped frame 1-1 or the closed end of the second U-shaped frame 1-2, and the other end of each of the two secondary springs is fixedly connected with the vehicle body), and secondary vibration reduction of the single-shaft bogie is realized through the secondary spring 4-1; the transverse shock absorber 4-2 is preferably provided with two pieces which are arranged along the transverse central axis in an anti-symmetric way, and the two transverse shock absorbers 4-2 are both connected with the frame 1 and the vehicle body in a horizontal way (specifically: one end of each transverse shock absorber 4-2 is fixedly connected with the closed end of the first U-shaped frame 1-1 or the closed end of the second U-shaped frame 1-2, and the other end is fixedly connected with the vehicle body); the vertical shock absorber (not marked) is preferably provided with two vertical shock absorbers which are arranged along the longitudinal central axis (the longitudinal central axis is specifically the central axis along the advancing direction of the single-axle bogie) in an antisymmetric way, the two vertical shock absorbers are both connected with the frame 1 and the two parts of the vehicle body in a vertical way (specifically, one end of each vertical shock absorber is fixedly connected with the closed end of the first U-shaped frame 1-1 or the closed end of the second U-shaped frame 1-2, the other end of each vertical shock absorber is fixedly connected with the vehicle body), and the two transverse shock absorbers 4-2 are matched with the two vertical shock absorbers (not marked) to attenuate the vibration transmitted to the vehicle body by the frame 1, so that the riding comfort of the vehicle is improved; the balance pull rod assembly 4-3 is provided with two pieces which are symmetrically arranged along the longitudinal central axis of the framework 1, the two balance pull rod assemblies 4-3 are both connected with the framework 1 and the vehicle body (specifically, one end of each balance pull rod assembly 4-3 is respectively fixedly connected with the side surface of the first U-shaped frame 1-1 or the second U-shaped frame 1-2, the other end is fixedly connected with the vehicle body), the traction pull rod assembly 4-4 is provided with two pieces which are symmetrically arranged along the transverse central axis of the framework 1, the two traction pull rod assemblies 4-4 are both connected with the framework 1 and the vehicle body (specifically, one end of each traction pull rod assembly 4-4 is respectively fixedly connected with the first cross beam 1-3 or the second cross beam 1-4, the other end is fixedly connected with the vehicle body), the two balance pull rod assemblies 4-3 and the two traction pull rod assemblies 4-4 act together, transmitting longitudinal traction and inhibiting nodding motion of the single-axle bogie; the transverse stop 4-5 is preferably provided with two pieces which are respectively mounted on the closed ends of the first U-shaped frame 1-1 or the second U-shaped frame 1-2 and used for limiting the transverse displacement of the vehicle body in the process of passing through a curve.

Preferably, the lateral stops 4-5 can be provided in a plurality of sets as required by the design.

Preferably, the transverse damper 4-2 and the vertical damper are preferably provided in two pieces symmetrically arranged about the dual axis of the traction motor 2-1.

Preferably, the two transverse stopping blocks 4-5 are symmetrically arranged along the longitudinal central axis of the framework 1, the two transverse stopping blocks 4-5 are preferably arranged into an L-shaped structure, one end of each transverse stopping block is fixedly connected with the first U-shaped frame 1-1 or the second U-shaped frame 1-2, and the other end of each transverse stopping block extends upwards freely to limit the vehicle body.

Preferably, the secondary spring 4-1 is one of an hourglass rubber spring, a laminated rubber spring, a spiral steel spring and an air spring.

As a further embodiment of the present invention, in order to suppress the nodding motion between the single-axle bogie and the vehicle body, two groups of tie rod assemblies 4-3 are provided, wherein a single group of tie rod assemblies 4-3 includes a first rod seat and a first tie rod, the first rod seat is fixedly connected with the side surface of the frame 1 (specifically: the first rod seat is fixedly connected with the side surface of the first U-shaped frame 1-1 or the second U-shaped frame 1-2), the first rod seat is provided with a first mounting hole for mounting the first tie rod, the first tie rod is penetratingly mounted in the first mounting hole and arranged in parallel with the side surface of the frame 1, and two ends of the first tie rod freely extend towards two ends along the transverse central axis and are provided with rubber nodes for connecting with the vehicle body at the extending ends; the traction pull rod assemblies 4-4 comprise two groups which are respectively arranged on the first cross beams 1-3 and the second cross beams 1-4, the single group of traction pull rods comprises a second rod seat and a second pull rod, the second rod seat is fixedly connected with the upper end face of the framework 1 (specifically, the second rod seat is fixedly connected with the upper end face of the first U-shaped frame 1-1 or the second U-shaped frame 1-2), the second rod seat is provided with a second mounting hole for mounting the second pull rod, the second pull rod is arranged in the second mounting hole in a penetrating way and is parallel to the upper end face of the framework 1, two ends of the second pull rod freely extend towards two ends along the transverse central axis, and a rubber node for connecting with a vehicle body is arranged on the extending end; through the combined action of the two groups of balance pull rod assemblies 4-3 and the two groups of traction pull rod assemblies 4-4, the longitudinal traction force is transmitted, and the nodding motion between the single-axle bogie and the vehicle body is restrained.

The guide mechanism 5 is provided with four groups which are respectively arranged on the open ends of the first U-shaped frame 1-1 and the second U-shaped frame 1-2, and the single group of guide mechanism 5 comprises an upper support 5-1, a lower support 5-2, a transmission pin 5-3, a screw rod 5-4, a compression spring 5-5, a guide wheel assembly 5-6 and a safety wheel assembly 5-7; the upper support 5-1 is connected with the lower support 5-2 through a transmission pin 5-3 to form a guide wheel bracket; one end of the screw rod 5-4 is rotatably connected with the upper support 5-1 through a connecting shaft, the other end of the screw rod is arranged on a spring connecting plate arranged on the lower support 5-2 in a penetrating way, and a nut is arranged on the screw rod 5-4; the compression spring 5-5 is sleeved on the screw rod 5-4, one end of the compression spring 5-5 is connected with a spring sleeve (a certain gap is arranged between the lower end of the spring sleeve and a spring connecting plate), the other end of the compression spring 5-5 is connected with the spring connecting plate arranged on the lower support 5-2, the compression spring 5-5 and the spring sleeve are synchronously compressed downwards through an adjusting nut to form pre-pressure, and the length of the compression spring 5-5 compressed downwards is limited through the spring sleeve; the guide wheel assemblies 5-6 are provided with two groups which are respectively arranged on two side surfaces of the lower support 5-2, each of the two groups of guide wheel assemblies 5-6 comprises a mounting seat, a guide wheel and a first connecting shaft, the mounting seats are fixedly connected with the side surfaces of the lower support 5-2, the guide wheels are rotatably connected with the mounting seats through the first connecting shafts and are kept in a close state with the outer side surface of the F rail 101 in the magnetic levitation track 100 through the pre-pressure of the compression springs 5-5 (specifically, the guide wheels in the guide wheel assemblies 5-6 are kept in a close state with the outer side surface of the magnetic levitation track under the pre-pressure action of the compression springs 5-5 by the lower support 5-2); the safety wheel assembly 5-7 comprises a safety wheel and a second connecting shaft, the safety wheel is rotatably connected with the lower support 5-2 through the second connecting shaft and is arranged below the outer magnetic pole surface of the F rail 101 and close to the lower end surface of the outer magnetic pole surface of the F rail 101 (specifically, in an initial state, the safety wheel in the safety wheel assembly 5-7 is close to the outer magnetic pole surface of the F rail 101 but is not in contact with the outer magnetic pole surface, namely, a gap is arranged between the safety wheel and the outer magnetic pole surface, and the gap is preferably set to be 5mm), when a vehicle turns on side in the running process, the safety wheel opposite to the vehicle turning direction contacts with the outer magnetic pole surface due to a turning-on-side acting force to form a new supporting point, so that the vehicle is prevented from being separated from the magnetic suspension rail.

Preferably, the upper support 5-1 is preferably provided with an L-shaped structure, one end of the L-shaped structure is connected with the open end of the first U-shaped frame 1-1 or the second U-shaped frame 1-2, and the other end of the L-shaped structure extends downwards freely and is rotatably connected with the lower support 5-2 through a driving pin 5-3.

As a further embodiment of the invention, the running wheels 6 comprise a steel rim and a solid rubber tread, which forms an integral bearing surface with the steel rim by means of a vulcanization process.

Preferably, the diameter of the running wheels 6 is set to 660mm and the tread width is set to 112 mm.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.