JPH07106054B2 - Connection structure of power supply board of linear motor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting a power feeding board of a linear motor.

[0002]

2. Description of the Related Art Recently, the use of a linear motor for transportation has been studied and developed. A linear motor of this type will be briefly described with reference to FIGS. This linear motor is a stator block in which plate-shaped permanent magnets 1 that are magnetized to different poles at regular intervals in the longitudinal direction and are magnetized to different poles in the thickness direction are arranged along the flow direction. A and a plurality of electromagnets 8 wound around the coil 3 in reverse winding on each side piece of the substantially U-shaped iron core 2 in which the permanent magnet 1 is interposed between both side pieces are arranged in the longitudinal direction of the permanent magnet 1. There is a so-called movable coil type which is composed of a movable element block B formed by being installed, and which causes the movable element block B to be propelled by selectively passing a current through the coil 3 of each electromagnet 8. Here, the mover block B includes a brush 4 to which the coil 3 of each electromagnet 8 is connected, and the electromagnets 8 are formed by arranging the electromagnets 8 in a row on a synthetic resin coupling body 10. Is the permanent magnet 1, the rectangular cylindrical stator case 7 in which the permanent magnet 1 is arranged over the entire length of the center of the lower surface of the top plate, and the brush 4 are in sliding contact with the mover block B. The power supply board 5 has conductors 5a and 5b for alternately applying positive and negative voltages to the coil 3 via the brush 4.

When connecting the stator block A in this type of conventional linear motor, the power supply board 5 must be connected. Therefore, conventionally, jumper wires or the like are soldered between the conductor portions 5a and 5b of the power supply boards 5 of the corresponding stator blocks A to connect the power supply boards 5 to each other. However, the above-described conventional method for connecting the power supply board 5 has a problem that it takes time and labor.

[0004]

[Problems to be Solved by the Invention]

The present invention has been made in view of the above heavens, and an object of the present invention is to provide a connection structure of a power supply board of a linear motor that can easily connect the power supply boards in a short time. It is in.

[0005]

In order to achieve the above object, the present invention uses a feeder board having flexibility so that at least the end portion can be bent, and two copper foil portions are formed. And connecting end plates of the stator blocks to be connected to each other, bend the ends of the power supply substrates to the inner wall surface of the stator case to which the power supply substrates are attached, and supply power to each stator block when connecting the stator blocks. A connecting plate is interposed between the substrate and the inner wall surface, and the conductor portions of the respective power feeding boards are connected to each other via the copper foil portion of the connecting plate.

[0006]

The present invention has the above-mentioned configuration,
Allows connecting the power supply boards of the stator blocks to be connected without soldering, bends the ends of the power supply boards, and inserts the connection plate between the power supply board and the inner wall surface of the stator case. The connection work can be easily performed by the above-mentioned work.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention is shown in FIGS. In the description of this embodiment, first, the basic configuration and operation of a linear motor to which the present invention is applied will be described.
Details will be described with reference to FIGS. The stator block A, as shown in FIG. 2 and FIG.
A stator case 7 having a rectangular tubular shape that serves as a guide rail, in which a guide groove 9 is bored in the center of the bottom plate along the longitudinal direction, and a fixed case arranged over the entire length in the center of the lower surface of the top plate of the stator case 7. It is composed of a long permanent magnet 1 as a child, and a power feeding board 5 which is attached to the inner surface of one side plate of the stator case 7 and feeds power to the coil 3 of the mover block B.

The permanent magnet 1 has a flat plate shape and is alternately magnetized into N poles and S poles at a constant pitch in the longitudinal direction, and is also magnetized into N poles and S poles in the thickness direction. ,
The length of one set of magnet pieces consisting of the N pole and the S pole in the longitudinal direction is L as shown in FIG. As shown in FIG. 4, the power supply board 5 has an insulating portion 5c meandering vertically at a regular interval in a central portion, and upper and lower portions separated by the insulating portion 5c are conductor portions 5a and 5b. For example, a positive voltage is applied to the coil 3 of the mover block B described later from the upper conductor portion 5a, and a negative voltage is applied to the coil 3 from the lower conductor portion 5b. Here, the conductor portions 5a and 5b at the center of the power feeding board 5 in the longitudinal direction are provided.
Is formed at L / 3, and the width of the insulating portion 5c located between the conductor portions 5a and 5b is formed at L / 6.

The mover block B has an iron core 2 formed by stacking approximately U-shaped yokes, a coil 3 wound around the iron core 2, and one end of the coil 3 is connected to the power feeding board. Three electromagnets 8 each of which is composed of a brush 4 which is slidably contacted with the electromagnet 5 are arranged in three phases. The other end of the coil 3 is commonly connected. Here, the length along the longitudinal direction of the stator case 7 of each electromagnetic scale 8 is set so as not to exceed L / 3. That is, when the length of the iron core 2 along the longitudinal direction of the stator block A is L ₀ as shown in FIG. 2, L ₀ <L / 3
In addition, the length of the electromagnet 8 when the coil 3 is wound does not exceed the above L / 3. The brushes 4 are attached to the mover block B by the insulating plate 6, and the distance between the brushes 4 provided for each electromagnet 8 is L / 3. The brushes 4 come into contact with the central position of the power supply board 5.

The inside of the stator case 7 has a two-stage structure as shown in FIG. 3, and the permanent magnet 1, the power feeding substrate 5, and the mover block B are housed in the upper stage portion, and the mover block B is A roller 11 for smoothly propelling and a connecting body 10 which is integrally fixed to the mover block B and which connects an object to be conveyed such as a decorative article are housed in a lower stage portion. Here, a connecting piece 10a protruding from the guide groove 9 of the stator case 7 is formed in the connecting body 10, and the transported object is connected to the hole 12 formed in the connecting piece 10a.

With this linear motor having the above-described structure, a current is switched from the power supply board 5 to any two phases of the three-phase coils 3a to 3c according to the movement of the mover block B. The magnetomotive force generated at this time obtains a propulsive force in a certain direction to move the mover block B. When moving the mover block B in the opposite direction, the positive and negative voltages of the conductor portions 5a and 5b of the power supply board 5 may be reversed.

The characteristic configuration of this embodiment will be described below. In this embodiment, a flexible board is used as the supply board 5, and the power supply board 5 is a pair of upper and lower guide projections formed on the inner wall side of the upper stage of the stator case 7 on the left side in the figure. It is attached by 7a and 7b as shown in FIG. Then, in order to connect the power supply boards 5 of the stator blocks A to be connected,
The connecting plate 13 shown in FIG. 1 is used. This connection plate 13
It is a thin flat plate with a thickness of about 0.5 mm, and is formed of a material such as phenol, and has copper foil portions 13a at the upper and lower ends in a horizontal direction.
Are formed respectively, and the upper and lower widths thereof are substantially matched with the upper and lower widths of the power supply board 5.

The power supply boards 5 are connected to each other using the connection plate 13 as follows. First, one stator brooke A
The end portion of the power feeding board 5 is bent downward to the inner wall side of the stator case 7 as shown in the first cormorant, and the connecting plate 13 is inserted between the power feeding board 5 and the inner wall of the stator case 7. However, at this time, the rear end portion of the stator case 7 is inserted so as to protrude from the end portion. Next, the other stator block A in which the end portion of the power supply board 5 is similarly bent is connected to the stator block A in which the connection plate 13 is inserted so that the end portions thereof come into contact with each other. At this time, the rear end portion of the connection plate 13 is inserted between the other power feeding board 5 and the inner wall surface of the stator case 7, and the conductor portions 5a of the both power feeding boards 5 and the conductor portions 5b are either above or below. It is connected via the copper foil portion 13a. By doing so, soldering or the like is not required when connecting the conductor portions 5a and 5b of the power supply board 5, and the power supply board 5 can be easily connected.
In the above description, the case where the entire power supply board 5 is formed of a flexible board has been described, but it is of course possible to use a method in which only the end portion of the power supply board 5 for connection is formed of a flexible board.

[0014]

As described above, the present invention uses a power supply board having flexibility so that at least its end portion can be bent, and is provided with a connecting plate having two copper foil portions formed therein, and is connected to the connection board. Bend the end of each power supply board of the stator block to the inner wall surface side of the stator case where the power supply board can be projected, and between the power supply board and the inner wall surface of each stator block when the stator block is continuous. Since the connecting plate is connected to and the conductor parts of the respective power supply boards are connected to each other via the copper foil part of the connection board, the power supply boards of the stator blocks to be connected are connected without soldering. Even if it is possible to simply bend the end of the power supply board and insert the connection plate between the power supply board and the inner wall surface of the stator case, the connection work can be easily performed.
Therefore, there is an advantage that the working time can be shortened.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a method for connecting a power supply board according to an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view showing the structure of a linear motor.

FIG. 3 is a sectional view of the above.

FIG. 4 is a plan view showing a power supply board.

[Explanation of symbols] A stator block B mover block 1 permanent magnet 2 iron core 3 coil 4 brush 5 power supply board 5a, 5b conductor part 7 stator case 8 electromagnet 13 connection plate

Claims (1)

[Claims] 1. A flat permanent magnet, which is magnetized to different poles at regular intervals in the longitudinal direction and is magnetized to different poles in the thickness direction, in a longitudinal direction in a cylindrical stator case. A plurality of electromagnets, each of which has a coil wound around each side piece of a substantially U-shaped iron core in which a permanent magnet is interposed between the both sides of the stator block, is wound along the longitudinal direction of the permanent magnet. And a brush to which the coils of the electromagnets are connected is provided in the mover block, and the brush slides into contact with the mover block to move through the brush. In a linear motor in which a stator block is provided with a power supply board on which conductors for alternately applying positive and negative voltages to coils are provided, a power supply board having at least end flexibility is used. Strip copper foil With the formed connecting plate, each end of the power supply board of the stator block to be connected is bent to the inner wall surface side of the stator case to which the power supply board is attached, and each stator block is connected when the stator block is connected. Of the power feeding board of the linear motor, characterized in that the connection board is interposed between the power feeding board and the inner wall surface, and the conductor portions of the respective power feeding boards are connected via the copper foil portion of the connection board. Connection structure.