JP2010048018A - Reaction plate mounting structure for linear motor car - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mount a reaction plate to a rail with high work efficiency in a linear motor car system. <P>SOLUTION: This mounting structure of the reaction plate 11 made of aluminum used as a secondary side conductor of a linear motor, to an upper face 3x of the steel rail 3 for a linear motor car comprises carrying out friction agitation welding of one side edge of a flat mounting plate 12 narrower in width than the reaction plate 11, to both side edges of the reaction plate 11, and fillet-welding the other side edge of the mounting plate 12 to the upper face 3x of the rail 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure for attaching a reaction plate to an upper surface of a rail in a linear motor car system.

  The linear motor car system magnetically levitates the vehicle and causes the vehicle to travel by the cooperation of the primary coil of the linear motor provided on the vehicle side and the reaction plate serving as the secondary conductor provided on the rail side. It is.

  Since the rail is made of steel and the reaction plate is made of aluminum, the reaction plate cannot be attached to the rail by ordinary welding. Therefore, the mounting structure as disclosed in Patent Document 1 is adopted.

  The mounting structure of Patent Document 1 will be described below. The reaction plate integrally has a flat plate portion and edges having a complicated cross-sectional shape formed on both sides of the flat plate portion. On the other hand, the rail has a portion for attaching the reaction plate (hereinafter referred to as a mounting portion), and this mounting portion is raised from the other portion and has a flat upper surface and both side surfaces.

  The flat plate portion of the reaction plate is placed on the flat upper surface of the mounting portion of the rail, and both sides of the reaction plate are connected to the both side surfaces of the mounting portion of the rail with a pin. That is, press-fitting holes were previously formed at intervals on both side surfaces of the rail mounting portion, and a large number of through-holes were also formed at both side edges of the reaction plate, and these through-holes were positioned in the press-fitting holes. In this state, the pin is inserted from the through hole and press-fitted into the press-fitting hole.

In the above-mentioned Patent Document 1, the reaction plate has a complicated cross-sectional shape and is expensive to manufacture by drawing or the like.
In addition, the work of attaching the reaction plate is accompanied by the positioning of the through hole and the press-fitting hole, so the workability is poor.
Japanese Patent No. 3830811

  In order to solve the above problems, the present invention provides a structure in which an aluminum reaction plate serving as a secondary side conductor of a linear motor is attached to the upper surface of a steel rail for a linear motor car. The steel plate is placed on the flat upper surface of the rail, and steel mounting members are arranged on both sides of the reaction plate in the width direction. The mounting member supports the reaction plate so as not to move and is welded to the rail. The reaction plate mounting structure is characterized by that.

  According to the above configuration, the reaction plate is inexpensive because a flat plate material can be used. In addition, since the reaction plate is supported via a mounting member that is welded to the rail, it is not necessary to connect with pins at both side edges of the reaction plate, so drilling and hole matching operations can be omitted. The workability of the work of attaching the plate to the rail is improved.

Preferably, each attachment member is friction stir welded to the side edge of the reaction plate.
According to this, the reaction plate and the mounting member are firmly connected by welding. Moreover, since friction stir welding is a metal solid-phase bonding that uses plastic flow, the bonding temperature is low, the thermal strain is low, and the cooling rate is fast, so formation of an intermetallic compound layer at the bonding interface can be suppressed, and good welding is achieved. Is possible.

Preferably, each mounting member comprises a flat mounting plate narrower than the reaction plate, one side edge of the mounting plate is friction stir welded to the side edge of the reaction plate, and the other side edge is the rail. Fillet welded.
According to this, the reaction plate can be more easily attached to the rail using the attachment plate.

Preferably, the mounting plate has the same thickness and the same length as the reaction plate, and is welded to the reaction plate flush with each other, thereby forming one flat joining plate.
According to this, the reaction plate can be more easily attached to the rail by welding the joining plate to the rail.

Preferably, on the upper surface of the reaction plate and the mounting plate, a first recess is formed in an area including the friction stir weld and extending along the friction stir weld, and the first recess is formed in the first recess. A first insulating material is accommodated.
According to this, electrolytic corrosion between the reaction plate and the mounting plate can be suppressed by the first insulating material.

Preferably, on the upper surface of the rail or the lower surface of the mounting plate and the reaction plate, a second recess is formed in a region extending along the reaction plate that includes the friction stir weld and is wider than the reaction plate, A second insulating material is accommodated in the second recess.
According to this, electrolytic corrosion between the reaction plate, the rail and the mounting plate can be suppressed by the second insulating material.

Instead of friction stir welding, the reaction plate can be attached to the rail as follows.
Both side edges of the reaction plate have a receiving surface that is inclined so that the normal line faces obliquely upward, and the mounting member has a holding surface that is inclined so that the normal line faces obliquely downward. The reaction plate is supported by the contact of the surface with the receiving surface.
More preferably, the mounting plate is a mounting plate narrower than the reaction plate, the pressing surface is formed on one side edge of the mounting plate, and the other side edge is fillet welded to the rail. .
More preferably, it has the same thickness and the same length as the reaction plate and is flush with the reaction plate.
More preferably, a concave portion including a joint portion between the receiving surface and the pressing surface is formed shallowly along the joint portion on the upper surface of the mounting plate and the reaction plate, and an insulating material is accommodated in the concave portion.
More preferably, in the upper surface of the rail, a recess is formed in a region that is wider than the reaction plate and that extends along the reaction plate including the joint portion, and an insulating material is accommodated in the recess.

In another aspect of the present invention, in the structure in which the reaction plate made of aluminum serving as the secondary side conductor of the linear motor is attached to the upper surface of the steel rail for the linear motor car, the reaction plate and the steel attachment plate are rolled by rolling. An integrated flat and elongated laminated plate is installed on the flat upper surface of the rail with the rear action plate facing upward, and both side edges of the mounting plate in the width direction are fillet welded to the upper surface of the rail. .
Even in this configuration, the reaction plate can be attached to the rail with good workability.

  According to the present invention, the reaction plate can be attached to the rail with good workability.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. First, a schematic configuration of a magnetic levitation type linear motor car system will be described with reference to FIG.

  On the ground side, a track girder 1 made of steel or PC concrete extending along the traveling direction of the vehicle (direction orthogonal to the paper surface) is provided. A sleeper 2 made of die steel is fixed to the track girder 1 at intervals in the longitudinal direction. The sleepers 2 extend in a direction perpendicular to the longitudinal direction of the track girder 1, and a pair of steel rails 3 extending in the longitudinal direction of the track girder 1 are fixed to the left and right ends thereof.

  Each rail 3 has a flat plate-like base portion 3 a fixed to the sleeper 2 and an extending portion 3 b that is integrally connected to the base portion 3 a and protrudes from the sleeper 2. A pair of ridges 3c that are separated from each other are formed on the lower side of the extending portion 3b. The upper part of the extension part 3b is a mounting part 3d that is raised from the base part 3a.

  An elongated joining plate 10 extending in the longitudinal direction of the rail 3 is attached to the upper surface of the attachment portion 3d. The joining plate 10 is composed mainly of a reaction plate 11 that constitutes the secondary side conductor of the linear motor, and will be described in detail later.

  On the other hand, the module 6 which makes a pair on the left and right is attached to the bottom surface of the vehicle 5 via an air spring 5a. The left and right modules 6 are arranged so as to straddle the left and right rails 3, and a plurality of sets are provided along the longitudinal direction of the vehicle 5.

  Each module 6 has a module body 6a having an L-shaped cross section. A plurality of levitation electromagnets 7 arranged at intervals in the longitudinal direction of the rail 3 are provided in the vertical portion of the module body 6a. The electromagnet 7 is opposed to the pair of protrusions 3 c of the extending portion 3 b of the rail 3. When a current flows through the electromagnet 7, an attractive force acts between the electromagnet 7 and the rail 3, thereby causing the vehicle 5 to float.

  A linear motor primary coil 8 is provided on the lower surface of the horizontal portion of the module body 6a. The primary side coil 8 faces the reaction plate 11, and the vehicle 5 travels along the rail 3 in cooperation with the reaction plate 11 when driven.

  As shown in FIGS. 1 and 2, the joining plate 10 includes an aluminum alloy (aluminum) reaction plate 11 and a pair of left and right steel mounting plates 12 (mounting members) disposed on both sides in the width direction. And is flattened over the entire area and extends in the longitudinal direction of the rail 3. In this embodiment, it is almost the same length as the rail 3 (slightly shorter).

  The reaction plate 11 is an elongated flat plate and extends in the longitudinal direction of the rail 3. The mounting plate 12 is also made of a flat plate and is narrower than the reaction plate 11 but has the same thickness and the same length.

  Both side edges in the width direction of the aluminum reaction plate 11 and one side edge of the steel mounting plate 12 are joined together in a single plane by friction stir welding (FSW). This friction stir weld is indicated by reference numeral 13 in FIGS.

On the upper surface of the joining plate 10 (upper surfaces of the reaction plate 11 and the mounting plate 12), a shallow concave portion 14 (first) is formed in a region including the friction stir welded portion 13 and extending along the friction stir welded portion 13 so as to be wider than this. 1 recess) is formed, and the recess 14 is coated with an insulating material 15 (first insulating material) such as silicon sealant for preventing electrolytic corrosion between different metals.
In addition, the said recessed part 14 may be formed after the said friction stir welding, and may be formed before a friction stir welding.

On the other hand, the upper surface 3x of the mounting portion 3d of the rail 3 is horizontal and flat. A shallow recess 3y (second recess) extending in the longitudinal direction of the rail 3 is formed on the upper surface 3x. The recess 3 y is formed over the entire length of the rail 3.
The recess 3y has a width wider than the reaction plate 11, and the recess 3y accommodates an insulating material 20 (second insulating material) such as a silicon sealant for suppressing electrolytic corrosion between different metals. Has been.

The joining plate 10 is fixed to the upper surface 3x of the rail 3 in which the insulating material 20 is accommodated. This fixing is performed by fillet welding the both side edges of the joining plate 10, that is, the side edges of the pair of mounting plates 12 opposite to the friction stir welding portion 13 to the upper surface 3 x of the rail 3. This fillet weld is indicated by 30 in the figure. Since both the mounting plate 12 and the rail 3 are made of steel, fillet welding is possible.
In the present embodiment, the fillet welding is performed continuously over the entire length of the joining plate 10, but fillet welding may be performed at a plurality of positions at intervals.

  As described above, the fillet welding of the joining plate 10 allows the reaction plate 11 to be fixed to the rail 3 via the mounting plate 12 on both sides in the width direction. Work can be saved.

In the fixed state of the joining plate 10, the insulating material 20 covers the lower surface of the reaction plate 11, the pair of friction stir welds 13, and the attachment plate 12 in the vicinity of the friction stir welds 13. The reaction plate 11, the steel rail 3 and the mounting plate 12 are insulated, and electrolytic corrosion between dissimilar metals can be suppressed.
If the insulating material 20 is made the same length as the rail 3, the joining plate 10 is slightly shortened, and the edge of the joining plate 10 is slightly retracted from the longitudinal edge of the rail and the insulating material 20, the effect of suppressing electrolytic corrosion Can be increased.

Next, another embodiment of the present invention will be described. In these embodiments, components corresponding to the embodiments described earlier are assigned the same reference numerals, and detailed descriptions thereof are omitted.
In the second embodiment shown in FIG. 4, as in the first embodiment, the pair of mounting plates 12 are narrower than the reaction plate 11, but have the same thickness and the same length.

  Both side edges of the reaction plate 11 have receiving surfaces 11a that are inclined so that the normal line is obliquely upward. On the other hand, one edge of the mounting plate 12 has a pressing surface 12a inclined so that the normal line is inclined obliquely downward. The pressing surface 12a contacts the receiving surface 11a, so that the reaction plate 11 is supported. Yes. The other edge of the mounting plate 12 is fixed to the rail 3 by fillet welding as in the first embodiment.

The upper surface of the mounting plate 12 and the reaction plate are flush with each other, and a concave portion 14 (first concave portion) including a joint portion between the receiving surface 11a and the pressing surface 12a is formed along the joint portion on both upper surfaces. The insulating material 15 is accommodated in the recess 14.
In addition, it is preferable to support the reaction plate 11 at both ends in the longitudinal direction with other mounting plates in the same manner as described above.

  In the third embodiment shown in FIG. 5, a flat and elongated laminated plate 10A obtained by vacuum rolling is used. In this laminated plate 10A, the reaction plate 11 and the mounting plate 12A having the same planar shape are integrally laminated. The laminated plate 10A has a length substantially equal to that of the rail 3, and is installed on the upper surface 3x of the mounting portion 3d of the rail 3 with the reaction plate 11 facing upward. The side edges of the mounting plate 12A in the width direction are fillet welded to the upper surface 3x of the rail 3 over the entire length (or at a plurality of intervals), whereby the reaction plate 11 can be attached to the rail 3. Made.

The present invention is not limited to the above embodiment, and various aspects can be adopted. For example, in the first and second embodiments, instead of using a mounting plate having the same length as the reaction plate, a plurality of short mounting plates may be arranged along the side edge of the reaction plate.
Instead of the elongated mounting plate, a plurality of block-shaped mounting members may be arranged at intervals. In this case, the cross-sectional shape of the mounting member is the same as or similar to that of the first and second embodiments.
Instead of forming the second concave portion for accommodating the second insulating material in the rail 3, it may be formed on the lower surface of the reaction plate and the mounting plate.
A plurality of the reaction plate and the mounting plate may be arranged along the rail.

It is a longitudinal cross-sectional view of the reaction plate attachment structure which makes 1st Embodiment of this invention. In the same attachment structure, it is a top view of the joining plate obtained by carrying out friction stir welding of the reaction plate and the attachment plate. It is a front view showing a schematic structure of a linear motor car system to which the present invention is applied. It is a longitudinal cross-sectional view of the reaction plate attachment structure which makes 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the reaction plate attachment structure which makes 3rd Embodiment of this invention.

Explanation of symbols

3 Rail 3x Upper surface 3y 2nd recessed part 10 Joining plate 10A Laminated plate 11 Reaction plate 11a Receiving surface 12 Mounting plate (mounting member)
12a Holding surface 12A Mounting plate 13 Friction stir weld 14 First recess 15 First insulation 20 Second insulation 30 Fillet weld

Claims (7)

In the structure where the reaction plate made of aluminum that becomes the secondary side conductor of the linear motor is attached to the upper surface of the steel rail for the linear motor car,
The reaction plate forms an elongated flat plate and is placed on the flat upper surface of the rail. Steel attachment members are arranged on both sides in the width direction of the reaction plate, and the attachment member makes the reaction plate immovable. A reaction plate mounting structure characterized by being supported and welded to the rail.   2. The reaction plate mounting structure according to claim 1, wherein each mounting member is friction stir welded to a side edge of the reaction plate.   Each mounting member is a flat mounting plate that is narrower than the reaction plate. One side edge of the mounting plate is friction stir welded to the side edge of the reaction plate, and the other side edge fills the rail. The reaction plate mounting structure according to claim 2, wherein the reaction plate is welded.   The mounting plate has the same thickness and the same length as the reaction plate, and is welded to the reaction plate flush with each other, thereby forming a flat joining plate. Item 4. The reaction plate mounting structure according to Item 3.   On the upper surface of the reaction plate and the mounting plate, a first recess is formed in a region that includes the friction stir weld and is wider than the friction stir weld and extends along the friction stir weld. 5. The reaction plate mounting structure according to claim 3, wherein a material is accommodated.   On the upper surface of the rail or the lower surface of the mounting plate and the reaction plate, a second recess is formed in a region that is wider than the reaction plate and includes the friction stir weld and extends along the reaction plate. 6. The reaction plate mounting structure according to claim 3, wherein the second insulating material is accommodated in the recess. In the structure where the reaction plate made of aluminum that becomes the secondary side conductor of the linear motor is attached to the upper surface of the steel rail for the linear motor car,
A flat and elongated laminated plate in which the reaction plate and the steel mounting plate are integrated by rolling is installed on the flat upper surface of the rail with the rear action plate facing upward, and both side edges in the width direction of the mounting plate are A reaction plate mounting structure, wherein the upper surface of the rail is fillet welded.

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