JP2020010544A - Eddy current type rail brake device - Google Patents

Abstract

To provide an eddy current type rail brake device in which the length in a longitudinal direction of a railway vehicle is shortened.SOLUTION: An eddy current type rail brake device 1 includes: a magnetic array 40; a support member 3; a magnetic electrode block 4; a plurality of pole pieces 5; and a slide device 6. The magnetic array 40 is arranged in one array in longitudinal direction. The magnetic electrode block 4 is adjacent to a permanent magnet 2 of one end of the magnetic array 40, and is a magnetic material. When viewing the slide device 6 from an upper direction of the eddy current type rail brake device 1, a plurality of permanent magnets is arranged so that one permanent magnet and one pole piece are overlapped in a brake state. In a non-brake state, two permanent magnets adjacent in the longitudinal direction are overlapped with one pole piece 5, and the magnetic electrode block 4 and the permanent magnet 2 adjacent to the magnetic electrode block 4 are overlapped with the pole piece 5 of one end in the longitudinal direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an eddy current type rail brake device. More specifically, the present invention relates to an eddy current type rail brake device for a railway vehicle, which generates a eddy current using a permanent magnet on a railroad rail to obtain a braking force.

  Brake devices for railway vehicles are mainly classified into adhesive brake devices and non-adhesive brake devices. The adhesive brake device is a system in which a braking force is applied to a railroad wheel and a railroad vehicle is decelerated or stopped by a frictional force between the railroad rail and the railroad wheel. Examples of the adhesive brake device include a mechanical brake device such as a disc brake. On the other hand, the non-adhesive brake device is a system in which a braking force is directly applied to a railway vehicle to decelerate or stop the railway vehicle without depending on a frictional force between a railway rail and a railway wheel. An example of the non-adhesive brake device is an eddy current type rail brake device.

  The eddy current type rail brake device is provided with a magnet, and an eddy current is generated in the railroad rail by placing the railroad rail in a magnetic field from the magnet to obtain a braking force. Such an eddy current type rail brake device is used in combination with a service brake or as an emergency brake.

  An eddy current type rail brake device is disclosed in, for example, Japanese Patent No. 5151882 (Patent Document 1).

  The eddy current type rail brake device of Patent Document 1 includes a plurality of permanent magnets arranged in a straight line. The arrangement of the magnetic poles of the plurality of permanent magnets is alternately reversed in the arrangement direction. At the time of braking of the eddy current type rail brake device, the plurality of permanent magnets face the railroad rail and generate eddy current in the railroad rail. On the other hand, at the time of non-braking, a plurality of permanent magnets are rotated about the traveling direction of the railway vehicle as an axis, and are separated from the railway rail. As a result, no eddy current is generated in the rail. The eddy current type rail brake device of Patent Document 1 switches between a braking state and a non-braking state by such a configuration.

Japanese Patent No. 5151882

  However, in the eddy current type rail brake device of Patent Literature 1, a plurality of permanent magnets are rotated as a method of switching to a braking state or a non-braking state. Therefore, it is necessary to provide a movable range of a plurality of permanent magnets, and a certain amount of space is required in the left-right direction of the railway vehicle. In this regard, if the length of the eddy current type rail brake device in the left-right direction is large, the projected area from the outer shape of the wheel as viewed from the front-back direction becomes large, so that the possibility of collision of flying objects during traveling increases. For this reason, it is desired that the length in the left-right direction of the eddy current type rail brake device be further reduced.

  An object of the present invention is to provide an eddy current type rail brake device in which the length of a railway vehicle in the left-right direction is reduced.

  An eddy current type rail brake device mounted on a railway vehicle according to the present invention includes a magnet row, a support member, a magnetic pole block, a plurality of pole pieces, and a slide device. The magnet row includes a plurality of permanent magnets that are arranged in a row in the front-rear direction of the eddy current rail brake device, and whose arrangement of magnetic poles is alternately reversed in the arrangement direction. The support member is disposed above the magnet row, supports the magnet row, and is a magnetic body. The magnetic pole block is provided on the support member, is adjacent to the permanent magnet at one end of the magnet row in the front-rear direction, and is a magnetic body. The plurality of pole pieces are arranged in a row in the front-rear direction below the row of magnets and the pole block. The slide device is disposed above the support member, and is capable of switching the eddy current type rail brake device to a braking state or a non-braking state by sliding the support member in the front-rear direction. When viewed from above the eddy current type rail brake device, the slide device arranges a plurality of permanent magnets such that one permanent magnet and one pole piece overlap each other in a braking state, and in a non-braking state. Two permanent magnets adjacent in the front-rear direction overlap one pole piece, and the pole block and the permanent magnet adjacent to the pole block overlap one pole piece at one end in the front-rear direction.

  According to the eddy current type rail brake device of the present invention, the length of the railroad vehicle in the left-right direction can be reduced.

FIG. 1 is a side view showing an eddy current type rail brake device attached to a railway vehicle. FIG. 2 is a sectional view of the eddy current type rail brake device in a braking state. FIG. 3 is an enlarged view of a front end portion of the eddy current type rail brake device in FIG. FIG. 4 is a diagram illustrating the magnetic circuit in a braking state. FIG. 5 is a plan view schematically showing the overlap between the permanent magnet and the pole piece in the braking state as viewed from above the eddy current type rail brake device. FIG. 6 is a sectional view of the eddy current type rail brake device in a non-braking state. FIG. 7 is a diagram illustrating the magnetic circuit in a non-braking state. FIG. 8 is a plan view schematically showing the overlap between the permanent magnet and the pole piece in the non-braking state when viewed from above the eddy current type rail brake device. FIG. 9 is a sectional view taken along line IX-IX in FIG.

  (1) The eddy current type rail brake device attached to the railway vehicle of the present embodiment includes a magnet row, a support member, a magnetic pole block, a plurality of pole pieces, and a slide device. The magnet row includes a plurality of permanent magnets that are arranged in a row in the front-rear direction of the eddy current rail brake device, and whose arrangement of magnetic poles is alternately reversed in the arrangement direction. The support member is disposed above the magnet row, supports the magnet row, and is a magnetic body. The magnetic pole block is provided on the support member, is adjacent to the permanent magnet at one end of the magnet row in the front-rear direction, and is a magnetic body. The plurality of pole pieces are arranged in a row in the front-rear direction below the row of magnets and the pole block. The slide device is disposed above the support member, and is capable of switching the eddy current type rail brake device to a braking state or a non-braking state by sliding the support member in the front-rear direction. When viewed from above the eddy current type rail brake device, the slide device arranges a plurality of permanent magnets such that one permanent magnet and one pole piece overlap each other in a braking state, and in a non-braking state. Two permanent magnets adjacent in the front-rear direction overlap one pole piece, and the pole block and the permanent magnet adjacent to the pole block overlap one pole piece at one end in the front-rear direction.

  According to such a configuration, the braking state or the non-braking state can be switched by sliding a plurality of permanent magnets arranged in a line in the front-rear direction of the eddy current type rail brake device. Therefore, there is no need to provide a movable range of the magnet array in the left-right direction of the eddy current type rail brake device, and the length of the eddy current type rail brake device in the left-right direction can be reduced. In addition, since the permanent magnet at the end of the magnet row is adjacent to the other permanent magnet on only one of the two sides in the front-rear direction, the magnetic flux emitted from the permanent magnet at the end of the magnet row is likely to leak to the outside. In this regard, in the eddy current type rail brake device of the present embodiment, since the magnetic pole block is provided, the magnetic flux emitted from the permanent magnet at the end of the magnet row easily passes through the magnetic pole block. Therefore, magnetic flux does not easily leak outside the eddy current type rail brake device.

  (2) It is preferable that the eddy current type rail brake device of (1) further includes a casing for accommodating the magnet rows, the support members, and the magnetic pole blocks. In this case, when viewed from the front-back direction of the eddy current rail brake device, the length of the slide device in the left-right direction of the eddy current rail brake device is shorter than the length of the casing in the left-right direction of the eddy current rail brake device.

  The size of the sliding device increases in the sliding direction because it is necessary to provide a movable range in the sliding direction. In this regard, in the eddy current type rail brake device of the present embodiment, since the sliding direction of the magnet rows is the front-back direction of the eddy current type rail brake device, the size in the left-right direction can be small. Therefore, it is possible to arrange the slide device such that the length of the slide device in the left-right direction is shorter than the length of the casing in the left-right direction.

  (3) In the eddy current type rail brake device according to the above (1) or (2), the slide device includes an actuator, two stands attached to a support member, a connecting member connecting the actuator and the two stands, It is preferred to include

  According to the slide device having such a configuration, by operating the actuator, the connecting member moves in the front-rear direction, and the support member (a plurality of permanent magnets) attached to the two stands can slide in the front-rear direction. Is also simple.

  (4) In the eddy current type rail brake device according to any one of the above (1) to (3), it is preferable that the total number of the plurality of pole pieces is one greater than the total number of the plurality of permanent magnets.

  In the braking state, one permanent magnet overlaps with one pole piece when viewed from above the eddy current rail brake device. If the number of permanent magnets and the number of pole pieces are the same, when a plurality of permanent magnets are slid to switch to the non-braking state, a pole piece overlapping the permanent magnet at the end of the magnet row and the magnetic pole block adjacent thereto Will no longer exist. In this regard, if one more pole piece is provided than the total number of the plurality of permanent magnets, even if the plurality of permanent magnets slide, the permanent magnets and pole blocks at the ends of the magnet row may overlap with the pole pieces. it can. Therefore, it is possible to further suppress the leakage of the magnetic flux at the longitudinal end of the eddy current type rail brake device.

  (5) In the eddy current type rail brake device according to any one of the above (1) to (4), further provided on the support member, adjacent to the other end permanent magnet of the magnet row in the front-rear direction, and is a magnetic material. Preferably, another pole block is included.

  As described above, if a plurality of permanent magnets are arranged in a line in the front-rear direction, the permanent magnet at the end of the magnet row is adjacent to the other permanent magnet only on one side of both sides in the front-rear direction. The same applies to the permanent magnet at the other end of the magnet row. If the second magnetic pole block adjacent to the permanent magnet at the other end of the magnet row is provided, the braking force can be sufficiently exerted at both ends in the front-rear direction of the eddy current type rail brake device.

  (6) In the eddy current rail brake device according to any one of the above (1) to (5), the magnet array, the support member, the plurality of pole pieces, and the slide device can be further moved up and down in the vertical direction of the eddy current rail brake device. It is preferable to include a simple lifting device.

  According to such a configuration, the eddy current type rail brake device can be separated from the railway rail when it is not necessary to apply the braking force of the railway vehicle (that is, at the time of non-braking). Therefore, it is not necessary to take measures to avoid inadvertent contact between the eddy current type rail brake device and the railroad rail.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts have the same reference characters allotted, and description thereof will not be repeated.

  First, directions in the present specification will be described. In this specification, the “front-rear direction” refers to the traveling direction of a railway vehicle. In the present specification, the “vertical direction” means a vertical direction in a state where the railway vehicle is standing upright and stationary. In the present specification, the “left-right direction” means a direction perpendicular to both the front-rear direction and the up-down direction. In addition, the front-rear direction, the up-down direction, and the left-right direction of the eddy-current-type rail brake device mean the front-rear direction, the up-down direction, and the left-right direction in a state where the eddy-current-type rail brake device is mounted on a railway vehicle.

  FIG. 1 is a side view showing an eddy current type rail brake device attached to a railway vehicle. The cross section of the eddy current type rail brake device 1 is shown. Referring to FIG. 1, eddy current type rail brake device 1 is disposed between two wheels 10 arranged in the front-rear direction of railway vehicle 20. The eddy current type rail brake device 1 is attached to a bogie 21 of a railway vehicle 20 and is disposed between the bogie 21 and the railway rail 22 in the vertical direction of the railway vehicle 20.

  FIG. 2 is a sectional view of the eddy current type rail brake device in a braking state. FIG. 2 is a cross-sectional view taken along a plane perpendicular to the left-right direction of the railway vehicle. With reference to FIG. 2, the eddy current type rail brake device 1 of the present embodiment includes a magnet row 40, a support member 3, a magnetic pole block 4, a plurality of pole pieces 5, and a slide device 6.

[Magnet row]
The eddy current type rail brake device 1 includes a plurality of permanent magnets 2 arranged in a line in the front-rear direction. In this specification, the plurality of permanent magnets 2 arranged in this manner are called a magnet row. Here, “arranged in a line in the front-back direction” means that the plurality of permanent magnets 2 are arranged in a straight line along the front-rear direction by design, and the plurality of permanent magnets 2 are strictly arranged in the front-rear direction. Not only the case of arrangement but also the case of arrangement with a slight deviation from a strict straight line due to dimensional tolerance, mounting tolerance, etc.

  FIG. 3 is an enlarged view of a front end portion of the eddy current type rail brake device in FIG. Referring to FIG. 3, each permanent magnet 2 has two magnetic poles (N pole and S pole), and the two magnetic poles are arranged vertically. The arrangement of the magnetic poles of the plurality of permanent magnets 2 is alternately reversed in the front-back direction (array direction). In other words, the arrangement of the magnetic poles of two permanent magnets 2 adjacent in the arrangement direction is reversed.

  For ease of manufacture, it is preferable that all of the plurality of permanent magnets 2 have the same shape and the same magnetic properties. Further, the plurality of permanent magnets 2 are preferably arranged at equal intervals. The number of the plurality of permanent magnets 2 is not particularly limited, and may be appropriately set according to the size of the eddy current type rail brake device 1 and a required braking force.

[Supporting member]
The support member 3 is arranged above the magnet row 40. Here, “upward” means a direction along the above-described vertical direction. The same applies to “downward” described later. The support member 3 extends in the front-rear direction and supports the magnet row 40. The support method is, for example, an adhesive, bolt fastening, or the like. The support member 3 is a magnetic body. This support member 3 can function as a yoke. There is no limitation on the size and material of the support member 3 as long as a plate thickness and a width capable of forming a magnetic circuit for expressing a predetermined braking force are secured. The material of the support member 3 may be a known magnetic material (eg, carbon steel, cast iron, or the like). This is the same for the material of the pole block 4 and the pole piece 5 described later. The shape of the support member 3 is not particularly limited as long as it can support the plurality of permanent magnets 2 and the magnetic pole block 4 described later. For example, the support member 3 is a rectangular parallelepiped whose longitudinal direction is the arrangement direction of the plurality of permanent magnets 2.

[Magnetic pole block]
The magnetic pole block 4 is adjacent to the permanent magnet 2 at one end of the magnet row 40 in the front-back direction. That is, the magnetic pole block 4 is provided on the side that is not adjacent to the other permanent magnets 2 on both sides along the front-rear direction of the permanent magnets 2 arranged at the end of the magnet row. The magnetic pole block 4 is a magnetic material and is provided on the support member 3. The magnetic pole block 4 may be integral with the support member 3 or may be separate. When the pole block 4 is integral with the support member 3, the material of the pole block 4 is the same as that of the support member 3. The shape of the magnetic pole block 4 is not particularly limited, and may be the same as the permanent magnet 2 or may be different from the permanent magnet 2.

  Referring to FIG. 2, magnetic pole block 4, magnet row 40 and support member 3 are housed in casing 8 whose longitudinal direction is the front-back direction. The casing 8 includes a side wall 11 and an upper lid 12. The side wall 11 is provided in the front-back direction and the left-right direction of the support member 3, and surrounds the magnetic pole block 4, the magnet row 40, and the support member 3. The distance in the front-rear direction between the side wall 11 disposed in front of the support member 3 and the rear wall 11 is longer than the length in the front-rear direction of the support member 3. Thereby, by operating the slide device 6 as described later, the support member 3 (the plurality of permanent magnets 2) can be slid in the front-rear direction.

[Pole piece]
The plurality of pole pieces 5 are arranged in a line in the front-rear direction below the magnet row 40 and the magnetic pole block 4. In the braking state, a slight gap is provided between each pole piece 5 and each permanent magnet 2. Each pole piece 5 is a magnetic material. All the pole pieces 5 are preferably of the same shape and the same material, and are preferably arranged at the same interval as the plurality of permanent magnets 2.

  Each pole piece 5 is provided on a casing cover 7 which is a non-magnetic material. The casing cover 7 is attached to the lower end of the side wall 11 of the casing 8 and faces the upper lid 12 in the vertical direction. That is, the casing cover 7 functions as a lower cover of the casing 8. The reason why the casing cover 7 is made of resin or non-magnetic material (eg, austenitic stainless steel or aluminum alloy) is that the magnetic flux from the permanent magnet 2 is positively passed through the pole piece 5 as described later, This is for suppressing passage through the cover 7.

[Slide device]
The slide device 6 is disposed above the support member 3 and can slide the support member 3 in the front-rear direction. The slide device 6 includes an actuator 14, two stands 13 attached to the support member 3, and a connecting member 15 connecting the actuator 14 and the two stands 13. The actuator 14 is, for example, a fluid type or electromagnetic control type actuator. The connecting member 15 attached to the actuator 14 extends in the front-rear direction. A part of the connecting member 15 and the two stands 13 are accommodated in the casing 8, and the actuator 14 is disposed outside the casing 8. For example, as shown in FIG. 2, a concave portion is formed by the upper lid 12, and the actuator 14 is accommodated in the concave portion. However, the arrangement of the actuator 14 is not limited to this, and may be mounted inside the casing 8.

  By operating the actuator 14, the connecting member 15 and the two stands 13 move in the front-back direction, and the support members 3 (that is, the plurality of permanent magnets 2) attached to the two stands 13 slide in the front-back direction. Thus, the eddy current type rail brake device 1 can be switched between a braking state and a non-braking state. Hereinafter, the braking state and the non-braking state will be described in detail.

[Magnetic circuit in braking state]
FIG. 4 is a diagram illustrating the magnetic circuit in a braking state. Referring to FIG. 4, in the braking state, one permanent magnet faces one pole piece 5 in the vertical direction. In this case, the magnetic flux of each permanent magnet is as follows.

  The following describes an example of a permanent magnet 2A having an N pole disposed below. The magnetic flux emitted from the N pole of the permanent magnet 2A passes through the pole piece 5, which is a magnetic material, and reaches the railroad rail 22. The magnetic flux that has reached the railroad rail 22 passes through the adjacent pole piece 5 and reaches the permanent magnet 2B in which the S pole adjacent to the permanent magnet 2A is arranged below. Further, the magnetic flux emitted from the N pole disposed above the permanent magnet 2B disposed below the S pole reaches the S pole of the adjacent permanent magnet 2A through the support member 3 which is a magnetic material. That is, a magnetic circuit is formed by two adjacent permanent magnets 2A and 2B, two pole pieces 5 facing the two permanent magnets 2A and 2B, the rail rail 22 and the support member 3, and the rail rail is an electric conductor. 22 will be in the magnetic field. Then, the railroad rail 22 moves in the magnetic field while the railroad vehicle is running, so that an eddy current is generated in the railroad rail 22 in the braking state. A demagnetizing field is generated by the eddy current, and a reaction force (braking force) acts on the eddy current type rail brake device 1 (that is, a railroad vehicle). When the magnet array and the plurality of pole pieces in such a braking state are viewed from above the eddy current type rail brake device, the following is obtained.

  FIG. 5 is a plan view schematically showing the overlap between the permanent magnet and the pole piece in the braking state as viewed from above the eddy current type rail brake device. Referring to FIG. 5, in the above-described braking state, at least a part of one permanent magnet 2 overlaps with one pole piece 5 as viewed from above the eddy current type rail brake device. In the present specification, “overlap” means that the projection surface of the permanent magnet 2 and the projection surface of the pole piece 5 overlap when only the permanent magnet 2 and the pole piece 5 are projected in the vertical direction. As described above, when the permanent magnet 2 and the pole piece 5 overlap, a magnetic circuit in the above-described braking state in which the magnetic flux from the permanent magnet 2 easily passes through the pole piece 5 can be formed.

  Preferably, at the time of braking, the whole area of one permanent magnet 2 overlaps with one pole piece 5 as viewed from above the eddy current type rail brake device. In other words, when viewed from above the eddy current type rail brake device, the projected area of one permanent magnet 2 is preferably smaller than the projected area of one pole piece 5. This makes it easier for more magnetic flux from one permanent magnet 2 to pass through one pole piece 5.

[Magnetic circuit in non-braking state]
The case where the eddy current type rail brake device 1 is in the non-braking state will be described.

  FIG. 6 is a sectional view of the eddy current type rail brake device in a non-braking state. Referring to FIG. 6, in order to bring the eddy current type rail brake device into the non-braking state, the slide device 6 is operated from the braking state shown in FIG. 2, and the support member 3 (magnet row 40) is slid in the front-back direction. . Then, two permanent magnets adjacent in the front-rear direction are opposed to one pole piece in the vertical direction. In this case, the magnetic flux of each permanent magnet is as follows.

  FIG. 7 is a diagram illustrating the magnetic circuit in a non-braking state. With reference to FIG. 7, as in the case of the braking state, a description will be given of an example of a certain permanent magnet 2A in which the N pole is disposed below. The magnetic flux emitted from the N pole of the permanent magnet 2A passes through the pole piece 5 and reaches the permanent magnet 2B in which the adjacent S pole is disposed below without passing through the railway rail 22. This is because one pole piece 5 faces both adjacent two permanent magnets 2A and 2B. The magnetic flux emitted from the N pole disposed above the permanent magnet 2B whose S pole is disposed below passes through the support member 3 and reaches the S pole of the permanent magnet 2A. That is, a magnetic circuit is formed by two adjacent permanent magnets 2A and 2B, one pole piece 5 and the support member 3 opposed to the two permanent magnets 2A and 2B. As a result, the railway rail 22 is hardly affected by the magnetic field, and eddy current is less likely to be generated in the railway rail 22. That is, the braking force is less likely to act on the railway vehicle.

  Subsequently, a magnetic circuit including the permanent magnet 2C at the end of the magnet row 40 and the magnetic pole block 4 adjacent thereto will be described.

  In the non-braking state, the pole piece 5 facing the magnetic pole block 4 also faces the permanent magnet 2C at one end in the front-rear direction. Therefore, the magnetic circuit including the permanent magnet 2C and the magnetic pole block 4 is as follows. When the N pole of the permanent magnet 2C at one end of the magnet row 40 is located below, the magnetic flux emitted from the N pole passes through the pole piece 5 and reaches the magnetic pole block 4 without passing through the rail rail 22. The magnetic flux reaching the magnetic pole block 4 passes through the support member 3 and reaches the S pole of the permanent magnet 2C at the end of the magnet row 40. That is, a magnetic circuit is formed by the permanent magnet 2 </ b> C at the end of the magnet row 40, the pole piece 5, the magnetic pole block 4, and the support member 3. As a result, eddy current is less likely to be generated in the rail rail 22 even at the end of the magnet row 40, and the non-braking state can be more reliably secured. When the magnet row and the plurality of pole pieces in the non-braking state are viewed from above the eddy current type rail brake device, the following is obtained.

  FIG. 8 is a plan view schematically showing the overlap between the permanent magnet and the pole piece in the non-braking state when viewed from above the eddy current type rail brake device. Referring to FIG. 8, in the non-braking state, at least a part of one pole piece 5 overlaps with each of two permanent magnets 2 adjacent in the front-rear direction when viewed from above the eddy current type rail brake device. As described above, if the two adjacent permanent magnets 2 and the pole piece 5 overlap, the magnetic flux from one permanent magnet 2 easily passes through the pole piece 5 and reaches the other permanent magnet 2, so that the above-described operation is performed. A magnetic circuit in such a non-braking state can be formed.

  The same applies to the overlap between the magnetic pole block 4 and the pole piece 5. That is, in the non-braking state, at least a part of one pole piece 5 overlaps with one magnetic pole block 4 and the permanent magnet 2 adjacent to the magnetic pole block 4 when viewed from above the eddy current type rail brake device. Preferably, when viewed from above the eddy current type rail brake device, the projected area of one magnetic pole block 4 is smaller than the projected area of one pole piece 5.

[Length in the left-right direction of the eddy current type rail brake device]
FIG. 9 is a sectional view taken along line IX-IX in FIG. With reference to FIG. 9, as described above, according to the eddy current type rail brake device 1 of the present embodiment, the support member 3 (that is, the magnet row 40) is moved in the front-rear direction (permanent magnet arrangement direction). Since the switching to the braking state or the non-braking state is performed, it is not necessary to move the magnet row 40 in the left-right direction. Therefore, the length of the eddy current type rail brake device 1 in the left-right direction can be shortened because the movable range of the magnet row 40 is not required. Note that a lubricating member 16 such as a dry ash may be provided between the support member 3 and the side wall 11 in order to smoothly slide the support member 3.

[Preferred embodiment]
In order to shorten the length of the eddy current type rail brake device 1 in the left-right direction, when viewed from the front-back direction of the eddy current type rail brake device, the length of the slide device 6 in the left-right direction of the eddy current type rail brake device is: It is preferable that the length of the casing 8 in the left-right direction of the eddy current type rail brake device is shorter. According to such a configuration, the length of the eddy current type rail brake device in the left-right direction can be reduced by the amount that the slide device 6 does not protrude from the side wall 11 of the casing 8 in the left-right direction when viewed from the front-back direction.

[Total number of pole pieces]
Referring to FIG. 6, the total number of the plurality of pole pieces 5 is preferably one more than the total number of the plurality of permanent magnets 2. According to such a configuration, in the non-braking state, the magnetic pole block 4 can overlap with the extra pole piece 5 as viewed from above the eddy current type rail brake device 1. As a result, the leakage of the magnetic flux from the permanent magnet 2 to the outside at the longitudinal end of the eddy current rail brake device 1 can be suppressed as described above.

[Number of magnetic pole blocks]
Further, by providing the magnetic pole block 4 as described above, it is possible to suppress the leakage of the magnetic flux from the permanent magnet 2 at one end of the magnet row to the outside. In this regard, since the plurality of permanent magnets 2 are linearly arranged, the same applies to the permanent magnets 2 at the other end of the magnet row. Therefore, it is preferable to provide a second magnetic pole block 4 adjacent to the permanent magnet 2 at the other end of the magnet row in the front-rear direction.

[lift device]
In the braking state, it is desirable that the plurality of permanent magnets 2 be as close as possible to the rail 22 in order to generate an eddy current in the rail 22. In this regard, regarding the eddy current type rail brake device of the present embodiment, the eddy current type rail brake device is arranged so that the distance between the casing cover 7 and the railroad rail 22 is as short as possible.

  On the other hand, in the non-braking state, no eddy current is generated in the railroad rail 22, so that it is not necessary to bring the eddy current rail brake device close to the railroad rail 22. In addition, the distance between the eddy current type rail brake device and the railroad rail 22 is not always constant due to the load on the railroad vehicle, the inclination of the railroad vehicle in the left-right direction, the inertia force at the time of turning, and the like. Therefore, it is necessary to secure a minimum interval so that the bottom (casing cover 7) of the eddy current type rail brake device does not contact the railroad rail 22. Therefore, it is desirable that the eddy current type rail brake device includes a configuration that allows the eddy current type rail brake device to be separated from the railroad rail 22 when braking is not performed.

  Therefore, the eddy current type rail brake device 1 of the present embodiment includes an elevating device capable of vertically moving the plurality of permanent magnets 2, the support member 3, the pole piece 5, and the slide device 6 in the vertical direction. May be included. According to such a configuration, the elevator device can be operated in the non-braking state to separate the eddy current type rail brake device 1 from the railroad rail 22. The lifting device is, for example, a hydraulic actuator mounted on a bogie of a railway vehicle. More specifically, this actuator is attached to the casing 8 of the eddy current type rail brake device 1, and the eddy current type rail brake device 1 is moved up and down.

  The embodiments of the present invention have been described above. However, the above-described embodiment is merely an example for implementing the present invention. Therefore, the present invention is not limited to the above-described embodiment, and can be implemented by appropriately modifying the above-described embodiment without departing from the spirit thereof.

  In the above embodiment, the case where the two magnetic poles of the permanent magnet 2 are arranged in the up-down direction has been described. However, the arrangement of the two magnetic poles of the permanent magnet 2 is not limited to this, and the two magnetic poles may be arranged in the front-back direction or the left-right direction. Even in this case, the arrangement of the magnetic poles of the adjacent permanent magnets 2 is reversed.

  The eddy current type rail brake device of the present invention can be used as a brake device for a railway vehicle.

1: Eddy current type rail brake device 2: Permanent magnet 3: Support member 4: Magnetic pole block 5: Pole piece 6: Slide device 7: Casing cover 8: Casing 11: Side wall 12: Top cover 13: Stand 14: Actuator 15: Connection Member 20: Railway vehicle 21: Bogie 22: Railway rail 40: Magnet row

Claims (6)

An eddy current type rail brake device attached to a railway vehicle,
A magnet row including a plurality of permanent magnets arranged in a line in the front-rear direction of the eddy current type rail brake device, and the arrangement of magnetic poles is alternately reversed in the arrangement direction.
A support member that is disposed above the magnet row, supports the magnet row, and is a magnetic body;
A magnetic pole block that is provided on the support member, is adjacent to the permanent magnet at one end of the magnet row in the front-rear direction, and is a magnetic body;
A plurality of pole pieces arranged in a line in the front-rear direction below the magnet row and the magnetic pole block,
A sliding device that is disposed above the support member and that can switch the eddy current type rail brake device to a braking state or a non-braking state by sliding the support member in the front-rear direction,
Seen from above the eddy current type rail brake device, the slide device is:
In the braking state, the plurality of permanent magnets are arranged such that one permanent magnet and one pole piece overlap,
At the time of the non-braking state, the two permanent magnets adjacent in the front-rear direction overlap with one pole piece, and the magnetic pole block and the permanent magnet adjacent to the magnetic pole block are one of the one in the front-rear direction. An eddy current rail brake device overlapping the pole piece at the end. The eddy current type rail brake device according to claim 1, further comprising:
A casing that houses the magnet row, the support member, and the magnetic pole block,
As viewed from the front-rear direction of the eddy current type rail brake device, the left-right length of the eddy current type rail brake device of the slide device is longer than the left-right length of the eddy current type rail brake device of the casing. Short, eddy current rail brake device. The eddy current type rail brake device according to claim 1 or 2, wherein:
The slide device,
An actuator,
Two stands attached to the support member,
An eddy current type rail brake device, comprising: a connecting member that connects the actuator and the two stands. The eddy current type rail brake device according to any one of claims 1 to 3, wherein
The eddy current type rail brake device, wherein a total number of the plurality of pole pieces is one greater than a total number of the plurality of permanent magnets. The eddy current type rail brake device according to any one of claims 1 to 4, further comprising:
An eddy current type rail brake device provided on the support member, further comprising another magnetic pole block which is a magnetic body and is adjacent to the permanent magnet at the other end of the magnet row in the front-rear direction. The eddy current type rail brake device according to any one of claims 1 to 5, further comprising:
An eddy current type rail brake device, comprising: a lifting device capable of moving the magnet row, the support member, the plurality of pole pieces, and the slide device up and down in the vertical direction of the eddy current type rail brake device.

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