JPS605122B2 - Suction type magnetic levitation vehicle with multiple bogies - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, a traveling body that levitates and travels along a track by a magnetic attraction force is provided with three or more bogies each having an unsprung portion, and furthermore, the traveling body levitates and travels along a track by magnetic attraction. This invention relates to a support structure for a carriage of an attraction-type magnetically levitated vehicle, which allows these numerous vehicles to move and align in an arc with respect to the traveling body so as to maintain a good tracking condition when the vehicle moves. .

In general railway wheels, as shown in Figure 1, there are usually 2
A bogie 3 with an axle wheel 5 is provided at the front and rear of the vehicle, and at the center of the bogie 3 there is a rotating shaft 4, commonly known as a shin-zara, about which the bogie 3 can turn. Therefore, the structure is such that the curved track 1 can be passed without strain.

This method is commonly called a bogie wheel, and most current railway wheels follow this method. However, in the case of a suction type magnetically levitated vehicle, this bogie type bogie arrangement has several problems. This will be explained with reference to FIG. 2. The figure shows a case where the wheels of a conventional bogie car are eliminated and a bogie type is constructed with a bogie to which a levitation electromagnet is attached instead. That is, 2 pieces (or 4 pieces) on each side,
The trolley 12 is equipped with a total of four (or eight) electromagnets 14 on the left and right sides, and when energized, the excited electromagnets 14 generate an attractive force against the rail 11, and an electronic circuit connects the rail 11 and the electromagnets. The gap of 14 is controlled to be maintained at about 1 cough number side.

The car body is supported by these two carts and floats up, and is configured to run using the propulsion force of a separately provided linear motor. By the way, since such a magnetically levitated vehicle travels while being levitated by an electromagnet,
It is better to disperse the levitation force by elongating an electromagnet of the size required to levitate a traveling object of a certain weight and making it continuous along the track with as few gaps as possible, so that the other track to be attracted has a small cross-sectional area. Nowadays, it is better to use lightweight tracks, which helps to reduce the weight of the tracks, sleepers, and other related parts that support them, which not only reduces the overall construction cost, but also reduces the weight of the tracks. A low rigidity rail according to the invention has the advantage of allowing or facilitating adjustment and maintenance work on this type of track, which requires precision in installation accuracy. FIG. 3 shows, as an example for comparison, a case in which electromagnets are arranged continuously by maximizing the bogie type truck from the above-mentioned viewpoint.
However, in such a method, as can be seen in this figure, the elongated electromagnet 14 has a small curvature, and on the curved road 11, the area where the iron core faces the rail becomes small, especially when the rotating shaft 1
3 and parts with a large distance from it, that is, the center and both ends of the traveling body 10 and the vicinity of the rotating shaft 13, are largely deviated from the opposing surface of the heel, resulting in an undesirable decrease in the suction force as a whole. be understood. Therefore, in order to plan a curved trajectory with a small radius of curvature while continuing the electromagnets along the trajectory with as few gaps as possible in an attraction type magnetically levitated vehicle, it is surprising that this can be achieved using a bogie model. It is.

The present invention has been made in view of these points, and its gist is that the number of carts on which electromagnets are assembled is three or more, whereas in the past the number of carts on which electromagnets are mounted is limited to two bogies with one axle. Moreover, by making each of these bogies and their mutual relationship meet or approach the following conditions, the area in which the track rail and the electromagnet face each other can be minimized as much as possible even when passing through a planned curved road with the minimum curvature. It's what I learned.

That is, the above conditions include, for example, the number of carts is 3, 4, and 5.
The explanation will be given in Figure 4 (a), (c), and (c) showing the case of A.
(geometric center) is located approximately on the center line x one X-ray of the left and right trajectory on a curved road showing the minimum curvature of the planned trajectory;
B. The left-right symmetrical axis Y-Y of each bogie is approximately tangent to the center line of the track at the center points 21', 22', and 23' of each bogie, C. The car body (the main body of the traveling body) The amount of lateral movement of the sprung portion) from the left-right symmetry axis Z-Z is
Symmetry axis Z-Z of each bogie center point 21', 22', 23'
Values that are shifted to the right or left when viewed from the equation should be summed to be equal, and these conditions can include cases where it can be considered approximate within an error range of a few to a tenth figure. .

This is because the amount of deviation of the bogie from the car body is about a few meters at the maximum on a practical curved track compared to the total length of the running body. It will be understood that it is sufficient to satisfy the conditions within the above error range. Furthermore, among these conditions, condition A indicates a condition for three or more bogies to be able to fit on a curved road by having a moving component in the lateral direction of the vehicle body, and condition B indicates a condition where three or more bogies can fit on a curved road. The conditions for each bogie adapted to the road to point in a desired direction with respect to the curved road are shown, and the condition C is a condition for preventing head movement of the vehicle body, for example, if the traveling body stops on a curved road. This is a necessary condition to prevent the vehicle body from moving sideways when By the way, the condition for C is that the amount of deviation of the center of each bogie from the Z-Z axis is d, ~
As d7, in the case of 3 carts in Figure 4 A, illusion 4 = d5, and similarly, in the case of 4 carts in Figure 4 exit, illusion 6 = 7, and in the case of 5 carts in Figure 4 C, illusion 4 = d5. In the case, 121= is . It is clear that the bogie support system that requires the above-mentioned movements cannot be achieved with the conventional bogie type, which has a rough structure.

In order to realize such movement of the bogie, the present invention interposes a driving mechanism, such as a linear bearing, in the connection between the bogie and the car body, so that the bogie can move easily. The guide direction is set by the side of the slider so that the cart can make a desired movement due to the guiding force of the electromagnet built into the cart, which tries to directly face the rail.

The present invention will be described below based on embodiments shown in the drawings.

To explain in detail each of the bogies shown in FIG. 4C, in which the car body 10 is equipped with five bogies 21, 22, and 23, FIG. 5 explains two intermediate bogies 22 among these five bogies. 22' is the center point of the intermediate truck, and 25 is an air spring for connecting the vehicle body and the truck when the truck is supported at four points.

In this figure, assuming that the car body 10 and bogie 22 are moving in accordance with the three conditions mentioned above with respect to the track center line XX, then the car body center line Z-Z and the bogie center line Y-Y If the intersection point is ○, it can be considered that the trolley 22 has geometrically rotated around ○ as a virtual center. Therefore, at this time, the loci of movement of the four air springs 25 that receive the load of the vehicle body also become two circular arcs 26 centered on the circle.

Similarly, the terminal cart 21 will be explained with reference to FIG.
The intersection of the car body center line Z-Z and the bogie center line Y-Y is 0 on the aircraft.
2, it is assumed that the truck 21 has rotated around 02 as the virtual center, and the locus 26 of the movement of the four air springs 25 can be found in the same way. Next, if the locus of the air spring 25 is similarly determined for the central truck 23 using FIG. 7,
In this case, the car body center line Z-Z and the bogie center line Y-Y are parallel, and their intersection is a point at infinity, and an arc centered at this point is represented by a straight line perpendicular to the car body center line Z-Z.

This is based on the transition characteristics of the center bogie when the number of bogies is odd, such as when the number of bogies is 3 or 5, and when the number of bogies is even, as is clear from the above explanation, the shift characteristics of the center bogie are does not exist. Air spring 2 obtained as above
Figure 8 shows a summary of the movement loci of 5.If this locus is narrowed and, for example, two IJ nya bearing rails 27 are installed next to the slider at appropriate intervals, it can be approximated. You can obtain a cart that can move according to your purpose. FIG. 9 shows a more specific illustration of the support mechanism for the truck having the above-mentioned configuration, in which 25 is the air spring, 26 is the center line of the air spring, and 27 is the rail of the linear bearing. . In the above explanation, the rail 27 of the linear bearing is linear, so if the linear bearing incorporated in the air spring 25 is used to slide in a straight line, all parts except the central carriage are attached to one carriage.
Purely theoretically, four sets of two straight rails each would create an unreasonable movement for the locus of rotational motion of the air springs, but all the figures shown in this specification are based on curved tracks. Regarding the curvature, it is greatly exaggerated; in reality, the amount of movement is small and only a slight error can occur, and if an air spring that can absorb the existing lateral displacement is used, it will not work in practice. Said error is not a hindrance at all. Further, in this specification, each truck has four air springs, but it goes without saying that the same function can be achieved even if there are two air springs, one each on the left and right sides. However, if these four air springs are installed near the center of each of the four (or eight) electromagnets that divides the levitation force distribution into four, one (or two) of the electromagnets will lose its levitation force. In this case, by releasing the air from the corresponding air spring, it is possible to continue traveling with minimal problems such as the bogie falling. Considering this point, it is practical to install four air springs for each bogie. It can be said that the arrangement according to the above embodiment is extremely useful. In the above embodiment, assuming that the length of each truck is approximately 2 degrees, and the planned minimum radius of curvature is approximately 60, d, . d2 and d3 are on the 7-term number side, 3-term dan skin, and 7-cough side, respectively.

As described above, the present invention regarding the arrangement and support of multiple bogies in an attraction type magnetically levitated vehicle has extremely excellent effects, and the main effects are as follows.

1. Since the electromagnets are installed continuously, the track becomes lighter and construction costs are lower.

2. It is easy to correct the accuracy because it is a lightweight track.

3. The car body is lighter because multiple bogies support the car body at multiple points.

4 1 because there are many air springs that support the electromagnet and the trolley
~ Even if two electromagnets fail, the vehicle can still run without any problems.

5. The minimum curvature of the orbit can be made very small.

6. The reaction plate on the secondary side of the linear motor can be removed 4.

The explanation does not specifically mention other mechanical functions that the bogie should have, but each bogie has a brake device, a sensor that detects the gap with the track, and an auxiliary wheel when the bogie stops moving or loses levitation force. Alternatively, it is natural to appropriately equip the skid with an IJ nya motor, thrust transmission mechanism, etc. as a propulsion device.

In addition, in the above description, the case where a linear bearing is used as an example for the side of the slider is described, but any other suitable slider foundation may be applied, or the guideway may have an arc shape instead of a straight line. Of course, a horizontal slider may also be used.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the situation when a conventional bogie car passes through a curved road. Figure 2 A, C and C show the situation in which this bogie type is adopted for an attraction type magnetically levitated vehicle, A is a side view, C is a front view,
FIG. 3C is a plan view showing the movement of the cart. FIG. 3 is a plan view showing the movement of the two bogie type bogies when they are lengthened. FIG. 4 is a plan view showing the movement of each bogie when three or more bogies are assembled to the traveling body according to the present invention, where A shows three bogies, mouth shows four bogies, and C shows five bogies. This is the case. Figures 5 to 8 show an example of the arrangement of sliding and supporting mechanisms to realize the movement of each carriage in the case of five carriages, with Figure 5 showing the intermediate carriage and Figure 6 showing the terminal carriage. , FIG. 7 shows the central truck, and FIG. 8 shows the state in which they are combined. Figure 9A and Figure 9 show a specific example of the sliding and supporting mechanism for the traveling body and the truck, Figure 9A is a sectional view and Figure 9 is a partial side view. 1...Curved track, 2...Car body, 3...Bogie, 4...
...rotating shaft, 5...wheel, 10...car body, 11...track, 12...bogie, 13
... Rotating shaft, 14 ... Electromagnet, 21.
...Terminal trolley, 22...Intermediate trolley, 23...
...Central truck, 26...Air spring, 26...
...Trajectory, 27... Linear bearing rail, 21'... Center point of terminal bogie, 22'...
...Center point of intermediate bogie, 23'...Center point of center bogie. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Blind T Figure 8 Figure 9

Claims (1)

[Claims] 1. A car body, and three or more bogies that are sequentially installed in the lower part of the car body along the longitudinal direction and equipped with electromagnets that apply an attractive magnetic levitation force and a lateral guiding force to the track rail. , a sliding mechanism that operatively connects the bogie to the car body so as to be movable in a horizontal plane, and the guide direction of the bogie movement by the sliding mechanism is between the center line of the car body and the center of each bogie when passing the minimum curvature track. 1. An attraction-type magnetically levitated vehicle having a plurality of bogies, characterized in that the locus is defined by an arcuate trajectory centered on a point as close as possible to or coincident with the intersection of the lines, or an approximate straight line thereof.