JPS6135767B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetically levitated bogie for a levitated railway.

In recent years, as shown in Fig. 1, a magnetically levitated track has been constructed, consisting of a guide rail G at the center of the track, a running surface R on both sides of the guide rail, and an electromagnetic rail E with magnetic coils on the outside. The levitation/propulsion magnetic coil 2 and the guiding magnetic coil 3 attached to the bogie 1 supporting the vehicle body V are connected to the electromagnetic rail E.
It engages with the vehicle body V to propel, levitate, and guide the bogie 1 together with the vehicle body V. Also, when landing at low speed and in a state where no electromagnetic levitation force is generated, or when the levitation force suddenly disappears due to an electrical failure, In case of an emergency landing, the landing running wheels 4 attached to the trolley 1 are brought into contact with the running surface R to cause the trolley 1 to roll, and furthermore, when the guiding magnetic coil 3 breaks down,
A floating railway bogie for guiding the bogie 1 by bringing emergency guide wheels 5 attached to the bogie 1 into contact with guide rails G for emergency purposes is being researched.

In this type of railway, in order to improve energy efficiency, it is necessary to reduce the weight of the bogie and to have a soft magnetic spring constant during levitation, so that stability during floating and landing is required.

The present invention has been made to meet the above requirements, and its purpose is to provide a lightweight truck by simplifying the truck structure.

Another object of the present invention is to provide a bogie with good floating running stability and landing running stability by rationally arranging tow bars for transmitting electromagnetic propulsion force from the bogie to the car body. There is a particular thing.

Still another object of the present invention is to provide a bogie that allows simple transmission of vehicle body loads to the bogie and has good flying stability.

The gist of this invention consists of the formation of the side beams, the structure of the bogie frame consisting of the side beams, flexible cross beams, and rigid cross beams, and the mounting positions of the landing wheels and emergency guide wheels.

In order to reduce the weight of the truck, the iron core of the magnetic coil is used as a strength member, and the four magnetic coils are connected with bolts so as to be sandwiched between two longitudinal members from both sides.
One set of side beams was formed, and one set of side beams was placed on each side on the left and right in order to improve floating and landing stability. The left and right side beams are fixed firmly in an H-shape using flexible cross beams with a cross section with low rigidity against torsion, and the left and right side beams are connected to the left and right side beams by the rigid cross beams using the guiding magnetic coils at the tips of the left and right side beams. The bogie frame, which is composed of side beams, flexible cross beams, and rigid cross beams, can resist deformation in the horizontal plane, such as rhombus-shaped deformation, by connecting at least one pair of diagonal corners of the rectangle with pins. The structure is difficult to deform due to the high rigidity of the flexible cross beams in the horizontal plane, and is easy to deform due to the low torsional rigidity of the flexible cross beams and the pin connection connecting the side beams and the rigid cross beams against torsional deformation in the vertical direction. Furthermore, two landing running wheels and two emergency guide wheels are provided on the front and rear rigid cross beams to increase the distance between the front and rear mounting wheels.

The configuration will be described below with reference to FIGS. 2 to 8, which illustrate embodiments of the present invention. FIGS. 2 to 4 show an embodiment thereof,
In the figure, the magnetic coils 2 for levitation and propulsion are integrally constructed with a highly rigid iron core 2 _a , and two sets each for each left and right electromagnetic rail E, a total of four sets per bogie. placed on top. Two sets of magnetic coils 2 for levitation and propulsion on each side are arranged in the longitudinal direction of the electromagnetic rail E at intervals that are integral multiples of the coil pitch of the electromagnetic rail E.

The guiding magnetic coils 3 are integrally formed with the iron core _3a , and two sets each for each electromagnetic rail E on the left and right sides, and a total of four sets per bogie, are arranged on the bogie. Further, the guiding magnetic coil 3 is connected to the electromagnetic rail E.
To the extent that it does not interfere with the magnetic coil 2 for levitation/propulsion, the outside of the magnetic coil 2 for levitation/propulsion, that is, near both ends of the bogie, is placed in order to stably guide the vehicle. Placed.

A gap is provided between the electromagnetic rail E, the levitation/propulsion magnetic coil 2, and the guide magnetic coil 3 to the extent that they do not interfere with each other.

In order to support the magnetic coils 2 and 3 on the truck in the above arrangement, both sides of the two sets of levitation/propulsion magnetic coil iron core 2 _a and the guide magnetic coil iron core 3 _a are connected by longitudinal members 1 _a and 1 _b . A set of side beams is formed by firmly fastening the longitudinal member and each of the iron cores 2 _a and 3 _a with bolts 1 _d . By configuring the side beams of the truck in this manner, the floating/propulsion magnetic coil 2 and the guiding magnetic coil 3 are stably supported.

Since the side beams are subjected to complex forces such as levitation force, propulsion force, and guiding force when guiding the vehicle, it is necessary to increase the rigidity by connecting the left and right sides of the side beams with cross beams.

In this bogie, instead of using the side beams, the highly rigid levitation/propulsion magnetic coil core _2a can be used as a reinforcing member for the side beams. Furthermore, the levitation force P _L and propulsive force P _P due to the magnetic coil 2 are
Since it acts on the centers of _a and _1b , members _1a and _1b do not undergo torsional deformation. Therefore, member 1
For _a and 1 _b , the thickness t can be made relatively thin.

The magnetic coil iron cores _2a , _3a and the longitudinal member _1a ,
_1b is connected at its center to a flexible crossbeam _1e and a bolt _1f . The flexible cross beam _1e is made by bending a thin plate into a groove shape as shown in Figure 3, and increases shear and bending rigidity in the horizontal plane, and cross-section (for example, the cross-section in Figure 2).
AA) The torsional rigidity is lowered around the surroundings. In addition, the left and right side beams are connected and connected at their front and rear ends by rigid cross beams _1c . The method of connection is to connect one pair of diagonals of a rectangular bogie frame, which is made up of two sets of left and right side beams and two sets of front and rear rigid cross beams, with a pin 1 _g .
Rotatably connect with. The other pair of diagonals are firmly connected by bolts _1h . Furthermore, on the lower surface of the rigid cross beam _1c , a bracket 6 for attaching the landing wheel 4 and the emergency guide wheel 5 is attached with bolts 6a _.
It is installed integrally by.

Next, the operation of the truck configured as above will be explained.

First, when the landing running wheels 4 of the bogie land and roll while coming into contact with the somewhat uneven running surface R, in the bogie frame, the pin 1 _g rotates and the flexible cross beam 1 _e By being easily twisted, the landing running wheels 4 easily follow and contact the running surface R without straining the entire bogie frame, and the running wheels can run stably without being subjected to an uneven load. Therefore, there is no need for a special shaft spring device between the running wheel axle and the bogie frame as in conventional railways. Also,
During levitation, even if there is some imbalance in the levitation force P _L of the front and rear magnetic coils 2, the pin 1 _g rotates as in landing, and the flexible cross beam 1 _e is twisted. Therefore, an unreasonably large force is not applied to each fastening portion of the bogie frame. Furthermore, if a slight imbalance occurs in the propulsive force P _P of the left and right magnetic coils 2, the highly rigid rigid cross beam 1 _c and the flexible cross beam 1 _e cooperate to receive shearing force in the horizontal plane. , to prevent the bogie frame from forming a diamond shape. Furthermore, when the electromagnetic guiding force becomes invalid, the vertical force generated by the guiding force P _E generated in the emergency guide wheel 5 and the vertical distance H from the guiding wheel 5 to the rigid cross beam _1c (Fig. 4) The in-plane moment (P _E ×H) and the reaction force of the running wheels at the time of landing are received by the rigid cross beams 1 _c with sufficient strength, and the landing running wheels 4 are attached to the rigid cross beams 1 _c at the front and rear of the bogie. Since the distance between the front and back of the emergency guide wheels 5 is sufficiently large, pitching of the bogie caused by unevenness of the traveling road surface during landing is small, and yawing of the bogie does not occur even when the emergency guide wheels 5 act as guides. Since the guiding force P _E can be small, stable running can be achieved.

In the embodiments shown in Figures 2 to 4, the pair of diagonal joints are pin joints, but in order to allow the joints between the side beams and the rigid cross beams to be angularly displaced in a vertical plane, In addition, an elastic material such as rubber is used instead of a pin connection, and the elastic deformation action of the elastic material allows the same function as that of a pin connection.

FIGS. 6 to 8 show one embodiment thereof.
In a pair of rectangular diagonals consisting of the left and right side beams and the front and rear rigid cross beams, in order to connect the side beams and the rigid cross beams, a structure is installed on the upper surface of the longitudinal members 1 _a and 1 _b integrally with the longitudinal members. The top surface of the installed seat plate 1 _k and the rigid cross beam 1 _c
Insert a plate-shaped anti-vibration rubber 1 _i between the bottom surface of the
Further, a plate-shaped vibration isolating rubber 1 _j is placed on the upper surface of the rigid cross beam 1 _c , and these seat plate 1 _k , vibration isolating rubber 1 _i , rigid cross beam 1 _c and vibration isolating rubber 1 _j are fastened together with bolts. Rigid crossbeam 1 _c
are sandwiched between the anti-vibration rubbers 1 _i and 1 _j like a sandwich, so when vertical torsion is applied to the bogie frame, the thickness of the plate-shaped anti-vibration rubbers 1 _i and 1 _j increases. By elastically deforming into a wedge shape, the rigid cross beam 1 _c can be angularly displaced in a plane perpendicular to the side beams between the vibration isolating rubbers 1 _i and 1 _j . This function is similar to that of connecting a side beam and a rigid cross beam with pins.
That is, the entire bogie frame has a structure that is easily twisted in the vertical direction.

In the embodiments shown in FIGS. 2 to 8, the case where a pair of rectangular diagonals made up of left and right side beams and front and rear rigid cross beams are connected by pins or through elastic bodies is described. In addition to one pair of diagonal corners of a rectangular shape, one corner or two other corners can be connected by pins or elastic bodies, resulting in a structure that allows the entire bogie frame to easily twist and deform, achieving the desired purpose. You can. In this case, the left and right side beams are firmly connected in an H shape by the flexible cross beam 1 _e , which has low rigidity against torsional deformation but high shear and bending rigidity against deformation in the horizontal plane. The rectangular shape made up of the left and right side beams and the front and rear rigid cross beams will not transform into a parallelogram.

In FIG. 2, one end of the tow bar 7 is connected to the longitudinal member 1
_b and pin 7 _a , and the other end is attached to the tow bar holder V ₁ integrally attached to the vehicle body V.
and are rotatably connected via a pin _7b . In the plan view, the tow bars 7 are arranged symmetrically between the bogie 1 and the vehicle body V so as to form a figure-of-eight link.
The extension lines of the center lines of the two sets of tow bars intersect with each other at the 0 point of the plane center of the truck. In the vertical direction, as shown in FIG. 3, it is installed so as to match the height at which the propulsive force P _P of the levitation/propulsion magnetic coil 2 acts.

By arranging the towbar as described above,
No unbalance moment is generated in the bogie due to the propulsive force, and no pitching occurs.

Further, in general, in a railway vehicle, two sets of bogies are arranged at the front and rear of the car body V, as shown in FIG. When this type of vehicle travels on a curved track with a radius of curvature r, the bogie rotates at a rotation angle α around the rotation center pin C with respect to the center LL of the vehicle body.
The same can be said about this magnetically levitated trolley. In FIG. 2, by constructing the tow bar 7 into a figure-of-eight link, when the truck passes on a curved track, it can rotate about the 0 point, which is the center of the truck, as a virtual rotation center.

In this magnetically levitated bogie running track, the guide rail G, which has almost the same height as the propulsive force acting height, is installed at the center of the track, so the rotation center pin must be provided to match the propulsive force acting height. I can't. Since this magnetically levitated cart can rotate around the virtual rotation center when a rotation center pin is provided, the same effect as when an actual rotation center pin is provided can be obtained.

FIG. 9 schematically shows the relationship among the truck 1, the tow bar 7, and the tow bar holder _V1 integrated with the vehicle body.

In the figure, the solid line indicates the case where the bogie passes on a straight track, and the center line of the bogie is the center line L of the car body.
- Matches on L. As mentioned above, the 0 point is the center of the plane of the truck.

The broken line indicates the case where the bogie passes on a curved track as shown in Fig. 5, and the rotation angle α with respect to the center of the car body is
Correspondingly, the center line of the bogie is L-L on the car body center line.
It moves from L' to L', and one side of the draw bar 7 rotates by φ and the other rotates by φ'. At this time, the plane center 0 of the truck moves by x, y and moves to 0',
Although it slightly deviates from the original 0 position, the amount of movement in x and y is usually a small value, and in practical terms, the cart will be at 0.
It can be considered as rotating around a point.

A magnetically levitated bogie is equipped with a spring device between the bogie and the car body to support the vertical load of the car body and alleviate vertical vibration acceleration, but when passing through a curve, the bogie rotates relative to the car body. At this time, the spring device causes a relative displacement between the vehicle body and the bogie in a plane, and therefore allows lateral displacement in accordance with changes in the rotation angle.

The spring device of this bogie uses a spring device with low rigidity against lateral displacement, such as an air spring, so when passing through a curve, the rotation of the bogie is not hindered and stable running can be achieved. .

In FIGS. 2 and 3, the spring device 8 is located at the joint between the side beam and the flexible cross beam 1 _e , which are composed of longitudinal members 1 _a and 1 _b and two sets of magnetic coils 2 and 3 in the front and rear. Two sets of left and right members are provided, and they are arranged so that the pressure receiving center is located between the members 1 _a and 1 _b (center of the side beams), and in the center of the side beams. In the embodiments of FIGS. 2 and 3, an air spring is shown as the spring device. The lower surface of the spring device 8 is fastened to the flexible cross beam 1 _e by a bolt 8 _a , and the upper surface is fastened to the vehicle body V by a bolt 8 _b .

The vertical load on the vehicle body during levitation is balanced by the levitation force P _L generated by the levitation/propulsion magnetic coil 2, so the side beam should be placed between the front and rear levitation/propulsion magnetic coils L (Figure 2). The strength of the side beams may be small since it is sufficient to receive the transmission of force. Further, since the center of action of the front and rear levitation forces P _L and the center of pressure reception of the spring device are in the same plane, the longitudinal members 1 _a and 1 _b will not be twisted. Furthermore, since the spacing between the left and right spring devices 8, 8 is relatively large, rolling caused by spring deflection between the bogie and the vehicle body is reduced.

Figures 6, 7 and 8 show other embodiments which differ from the arrangement of the spring devices in the example described above. Four sets of spring devices 9 are provided on the rigid cross beam _1c , front and rear, right and left, and the spring devices are arranged so that the pressure receiving center of the spring device coincides with the support pressure receiving center when the landing running wheel 4 lands. In this example, an air spring is shown as the spring device. The lower surface of the spring device 9 is fastened to the rigid cross beam 1 _c by a bolt 9 _a , and the upper surface is fastened to the vehicle body V by a bolt 9 _b .

Since the vertical load on the vehicle body during landing or emergency landing is directly transmitted via the spring device 9 and the landing running wheels 4, other members do not receive the load.
Furthermore, since the distance between the front and rear spring devices is large, pitching due to spring deflection between the bogie and the car body is reduced.

As described above, the present invention utilizes the iron core of the magnetic coil, which is a component of the bogie, as a constituent member of the bogie frame, so there is an advantage that the weight of the bogie frame can be reduced.

In addition, in the structure of the bogie frame, we used pins or elastic bodies and thin flexible cross beams to maintain the ability of the running wheels to follow the running surface and achieve running stability. The device is omitted, and a trolley with a simple structure and light weight can be created.

Further, in the present invention, running stability is achieved by maintaining the bogie rotation function when passing through a curve and aligning the position of the tow bar with the height of action of the propulsive force.

Furthermore, the present invention simplifies the force transmission path and prevents the force from flowing to other members by rationally arranging the spring device and the landing wheel, thereby reducing the weight of the strength member. has advantages.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a known magnetically levitated vehicle running on a track, Fig. 2 is a plan view showing an embodiment of the bogie of the present invention, Fig. 3 is a side view thereof, and Fig. 4 is its side view. A front view, FIG. 5 is an explanatory diagram when the vehicle passes on a curve, FIG. 6 is a plan view showing another embodiment of the bogie of the present invention, FIG. 7 is a side view thereof, and FIG. 8 is a front view thereof. FIG. 9 is an explanatory view regarding deformation in a plan view of the truck of the present invention. 1...Bolly, 1 _a , 1 _b ... Longitudinal member, 1 _c ... Rigid cross beam, 1 _d , 1 _f , 1 _h , 6 _a , 9 _a , 9 _b ... Bolt, 1 _e
...Flexible cross beams, 1 _g , 7 _a , 7 _b ... Pins, 1 _i , 1 _j ...
Anti-vibration rubber, _1k ...seat plate, 2...magnetic coil for levitation and propulsion, _2a , _3a ...iron core, 3...magnetic coil for guidance,
4... Landing running wheel, 5... Emergency guide wheel, 6... Bracket, 7... Traction bar, 8, 9... Spring device, G... Guide rail, R... Running surface, E... Electromagnetic rail, V... Vehicle body, V ₁ ...Tow bar holder, 0...Center, C...Rotation center pin.

Claims (1)

[Scope of Claims] 1. A magnetic levitation track consisting of an upright guide rail in the center of the track, horizontal running surfaces on both sides, and electromagnetic rails with magnetic coils standing upright outside of the guide rail, with a levitation and propulsion coil installed. By arranging guide magnetic coils at a constant pitch in the direction of travel of the vehicle, and further arranging guide magnetic coils at a pitch larger than the pitch before and after the guide magnetic coils, a total of 4 In a truck with magnetic coils arranged in series, (a) the four magnetic coils are bolted together from both sides by two longitudinal members to form one side beam. (b) One set of side beams will be placed on each side, and the left and right side beams will be connected at the center with a flexible cross beam. (c) The left and right side beams are connected by a rigid cross beam at the guiding magnetic coil part at the tip of the side beam, and at least one diagonal pair is connected by pins. (d) Each rigid cross beam is provided with two landing wheels that roll on the running surface and two emergency guide wheels that engage with the guide rail. A magnetic levitation trolley characterized by: 2. The left and right side beams are connected by a rigid cross beam at the coil portion at the tip of the side beam, and at least one diagonal pair is connected via an elastic body, as described in claim 1. magnetic levitation trolley. 3 The bogie is connected to the car body by a link device having a virtual center approximately at the center of the projected plane of the bogie, and the operating height of the link device is made to substantially match the operating height of the magnetic coil for levitation and propulsion. A magnetically levitated trolley according to claim 1. 4. The magnetically levitated bogie according to claim 1, characterized in that a spring device for supporting the vehicle body is provided at the joint between the side beam and the flexible cross beam. 5. The magnetically levitated bogie according to claim 1, characterized in that spring devices for supporting the vehicle body are provided near both ends of the rigid cross beam.