JPH0336218Y2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Industrial Application Field The present invention relates to a reaction plate installed on the ground side of a linear motor used as a power source for transportation systems.

(2) Prior art The reaction plate of a linear motor is
As shown in the figure and FIG. 3, it is a composite body in which a conductive plate 2 such as an aluminum plate is superimposed on a band-shaped iron plate 1 and fixed to each other. When the iron plate 1 and the conductive plate 2 of this reaction plate are stacked together in a simple manner as shown in Fig. 3, they are mainly integrated by explosion bonding, but this method requires a special bonding method. However, since it is expensive in terms of cost, as shown in Figure 2,
The overlapping iron plates 1 and conductive plates 2 are fixed to each other by engaging them on both sides, or by pressing downwardly the flanges provided on both side edges of the conductive plates with clamps fixed on the roadbed. A structure has been devised to do so.

(3) Problems to be solved by the invention However, in the reaction plate formed by such a mechanical coupling method, a small gap is created between the iron plate 1 and the conductive plate 2, which acts as a heat insulating layer. Therefore, the conduction of the Joule heat generated in the conductive plate to the iron plate becomes poor, and it is inevitable that the temperature rise when the traveling body passes through becomes large.

In this way, if the temperature rise of the reaction plate increases, the amount of thermal expansion of that plate will naturally increase, and therefore, a large gap should be provided at the joint of the reaction plate to absorb the amount of thermal expansion and contraction. This results in a reduction in the thrust of the linear motor.

(4) Means for solving the problem The present invention aims to realize an inexpensive and high-performance linear motor by improving the transferability from the conductive plate of the reaction plate to the steel plate at low production cost using a mechanical coupling method. This solution solves the problem of poor conductivity, by providing an injection hole that penetrates either the steel plate or the conductive plate that are fixed to each other, and injecting the conductive filler into the gap between the joint surfaces of the steel plate and the conductive plate through this hole. This is a reaction plate that is characterized by:

In this way, if the heat conductivity of the joint is increased by using a filler material with better heat conductivity than air as a heat medium, the heat generated in the conductive plate will be absorbed by the steel plate and quickly flow to the roadbed side via the steel plate. Therefore, the temperature rise of the entire reaction plate including the iron plate as well as the conductive plate having a large coefficient of thermal expansion can be suppressed to a small level, and the gap at the connection portion of the reaction plate can be reduced.

(5) Example An example of the reaction plate of the present invention is shown in the attached FIG. 1.

As shown in the figure, a side wall 2a along the side surface of the strip iron plate 1 and a locking piece 2b bent inward from its lower end are integrally formed on both sides of the conductive plate 2 made of aluminum, copper, etc. The conductive plate and the iron plate are fixed to each other by engaging the locking pieces 2b on both sides with the lower surface of the iron plate 1.

Further, the conductive plate 2 is provided with injection holes 2c extending to the back surface at appropriate intervals in the length direction, and after fixing to the iron plate, a conductive filler 3 is injected into the gap between the joint surfaces through these holes.

Any material may be used as the conductive filler 3 as long as it has higher heat conductivity than air, exhibits fluidity during injection, and solidifies after injection.
Preferably, a material that exhibits elasticity after solidification, such as silicone rubber or asphalt resin, is used. This is because the elastic material adheres well to the conductive plate and the iron plate even if a positional shift occurs between the conductive plate and the iron plate due to a difference in coefficient of thermal expansion, and does not reduce heat conductivity.

Note that the locking piece 2b may be engaged with a groove provided in the side surface of the iron plate 1. Furthermore, the conductive plate and the iron plate can be fixed by a so-called caulking fitting method in which the conductive plate is engaged with the iron plate while deforming it, a fitting method in which the iron plate is inserted and engaged with a conductive plate formed in advance as shown in the figure, or This may be achieved by a mechanical coupling method such as a clamp fixing method in which a collar is attached to the lower end of the side wall of the conductive plate and extends outward, and the collar is tightened downward with a clamp attached to the roadbed. However, in order to eliminate lifting due to thermal expansion of the conductive plates, it is preferable to allow them to slide relative to each other within the range of thermal expansion/contraction differences in the length direction.

(6) Effects As explained above, in the reaction plate of the present invention, the gap between the iron plate and the conductive plate is filled with a heat conductive filler, so that the Joule heat generated in the conductive plate is transferred to the iron plate. As a result, the temperature rise during the passage of the traveling body is suppressed to a small level, and the gap at the connecting portion can be reduced to that extent, thereby reducing the reduction in the thrust force of the linear motor. For example 300KVA
Width 220 when the linear motor passes every 5 minutes
When the temperature rise of an aluminum plate of 5mm thick and 5mm thick was confirmed in a simulation experiment, it was 65deg in the structure shown in Figure 2, but due to the injection of silicone rubber filler.
It was confirmed that the present invention is effective in improving the performance of linear motors.

In addition, the reaction plate of this invention is
If a filler with good adhesive properties is used, the reaction force that acts on the conductive plate when the vehicle passes through can be transmitted to the steel plate due to its adhesive force, and therefore a special reaction force transmission means is not required. It also has advantages.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the reaction plate of the present invention, and FIGS. 2 and 3 are sectional views of a conventional reaction plate. 1... Iron plate, 2... Conductive plate, 2a... Side wall, 2
b... Locking piece, 2c... Injection hole, 3... Heat conductive filler.

Claims (1)

[Claims for Utility Model Registration] (1) In a reaction plate for a linear motor, which consists of a conductive plate placed on a belt-shaped iron plate and both of which are mechanically fixed, either one of the above-mentioned iron plate or the conductive plate A reaction plate for a linear motor, characterized in that an injection hole is provided through the plate, and a heat conductive filler is injected into the gap between the joint surfaces of the iron plate and the conductive plate through the hole. (2) The reactor for a linear motor as set forth in claim (1) of the utility model registration, characterized in that the heat conductive filler is a material that is liquid before filling and solidifies after filling to exhibit elastic properties. Yong plate.