JPH04210771A - Power supply board connection structure for linear motor - Google Patents

Abstract

PURPOSE:To connect a power supply board easily in a short time by employing a flexible power supply board having at least foldable ends, folding the end parts of power supply boards for respective stator blocks to be coupled toward the inner wall face side of stator casing and then connecting the conductor parts of the power supply boards through the copper foil part of a connecting board interposed between the power supply board and the inner wall face. CONSTITUTION:End part of a power supply board 5 for one stator block A is folded toward the inner wall side of a stator casing 7 and a connecting board 13 is inserted between the power supply board 5 and the inner wall of the stator casing 7. The other stator block A having similarly folded end part of power supply board 5 is then coupled with the stator block A inserted with the connecting board 13 so that the stator blocks A abut on each other. At that time, rear end part of the connecting board 13 is inserted between the other power supply board 5 and the inner wall face of the stator casing 7 thus connecting the conductors 5a or 5b of the power supply boards 5 through upper or lower copper foil part 13a. According to the constitution, soldering is not required in the connection of the conductors 5a, 5b resulting in easy connection of power supply board 5.

Description

[Detailed description of the invention]

[00011

[Industrial Field of Application] The present invention relates to a structure for connecting a power supply board of a linear motor. [0002]Recently, the use of linear motors for conveyance has been researched and developed. This type of linear motor will be schematically explained with reference to FIGS. 2 to 4. This linear motor consists of a stator that is magnetized with different polarities alternately at regular intervals in the longitudinal direction (B) and has flat permanent magnets 1 arranged along the longitudinal direction with different polarities magnetized in the thickness direction. A block A and a plurality of electromagnets 8 in the longitudinal direction of the permanent magnet 1 each having a coil 3 wound in reverse around each side of a substantially U-shaped iron core 2 with a permanent magnet 1 interposed between both sides. There is a so-called moving coil type which consists of movable blocks B arranged in a row and in which a current is selectively passed through the coil 3 of each electromagnet 8 to propel the movable block B. The mover block B is provided with a brush 4 to which a coil 3 for each electromagnet 8 is connected, and the electromagnets 8 are arranged in a row on a connecting body 10 made of synthetic resin. The magnet 1, the rectangular cylindrical stator case 7 in which the permanent magnet 1 is disposed over the entire length of the center of the lower surface of the top plate, and the brush 4 are in sliding contact with each other, and as the movable block B moves, the permanent magnet 1 is moved through the brush 4. and a power supply board 5 on which conductor parts 5a and 5b are formed to apply positive and negative voltages alternately to the coil 3. [0003] When connecting the stator block A in this type of conventional linear motor , the power supply boards 5 must be connected. Therefore, conventionally, jumper wires or the like are soldered between the conductor parts 5a and 5b of the power supply boards 5 of the respective stator blocks A corresponding to each other to connect the power supply boards 5. However, the conventional method of connecting the power supply board 5 described above has the problem of requiring time and effort. [0004]

[Problems to be Solved by the Invention] The present invention has been made in view of the above points, and its object is to provide a linear motor that can easily and quickly connect a power supply board. An object of the present invention is to provide a connection structure for a power supply board. [0005]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention uses a power supply board that has flexibility such that at least its ends can be bent, and has two copper foil sections formed thereon. The end of the power supply board of each of the stator blocks to be connected is bent toward the inner wall surface of the stator case to which the power supply board is attached, and the power supply of each stator block is connected when the stator blocks are connected. A connection plate is interposed between the board and the inner wall surface, and the conductor parts of the respective power supply boards are connected to each other via the copper foil part of the connection board. [0006]

[Operation] By configuring the present invention as described above,
The power supply boards of connected stator blocks can be connected to each other without soldering, and all you have to do is bend the end of the power supply board and insert the connection plate between the power supply board and the inner wall of the stator case. This makes the connection work easier. [0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 4 show an embodiment of the present invention. In explaining this embodiment, first, the basic structure and operation of a linear motor to which the present invention is applied will be explained in detail with reference to FIGS. 2 to 4. As shown in FIGS. 2 and 3, the stator block A includes a stator case 7, which has a rectangular cylindrical shape and serves as a guide rail, and has a guide groove 9 bored in the center of the bottom plate along the longitudinal direction; A long permanent magnet 1 as a stator is disposed in the center of the lower surface of the top plate of the stator case 7 over its entire length, and a coil 3 of the movable block B is attached to the inner surface of one side plate of the stator case 7. It is composed of a power supply board 5 that supplies power. [0008] The permanent magnet 1 has a flat plate shape, and is magnetized alternately to N and S poles at a constant pitch in the longitudinal direction, and is also magnetized to N and S poles in the thickness direction. ,
The length of a pair of magnet pieces consisting of an N pole and an 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 part 5c formed in the center that meanders vertically at a right angle at regular intervals, and the upper and lower parts separated by the insulating part 5C serve as conductor parts 5a and 5b. For example, a positive voltage is applied from the upper conductor part 5a to the coil 3 of the mover block B, which will be described later, and at the same time, the lower conductor part 5b
A negative voltage is applied to the coil 3 from . Here, the power supply board 5
The width of each conductor portion 5a, 5b at the center in the longitudinal direction is L
The width of the insulating portion 5C located between both groove portions 5a and 5b is L/6. [0009] The mover block B includes an iron core 2 formed by laminating substantially U-shaped yoke, a coil 3 wound around this iron core 2, and one end of this coil 3 connected to the above-mentioned power supply board. It has a three-phase configuration in which three electromagnets 8 each consisting of a brush 4 and a brush 4 that are in sliding contact with each other are arranged in a row. Note that the other ends of the coils 3 are commonly connected. Here, the length of each electromagnet 8 along the longitudinal direction of the stator case 7 is set not to exceed L/3. In other words, if the length of the iron core 2 along the longitudinal direction of the stator block A is Lo as shown in FIG. 2, then Lo <L
/3, and the length of the electromagnet 8 when the coil 3 is wound is also set not to exceed the above-mentioned L/3. The brushes 4 are attached to the movable block B by an insulating plate 6 and are provided for each electromagnet 8 at an interval of L/3, and these brushes 4 contact the center of the power supply board 5. [00101 The inside of the stator case 7 has a two-stage structure as shown in FIG. Rollers 11 for propelling the movable block B and a connecting body 10 that is integrally fixed to the mover block B and connects objects to be transported such as ornaments are housed in the lower part. Here, the connecting body 10 is formed with a connecting piece 10a that protrudes from the guide groove 9 of the stator case 7, and the conveyed object is connected to the hole 12 formed in the connecting piece 10a. [0011] With this linear motor having the above-described structure, a current is selectively passed from the power supply board 5 to any two phases of the three-phase coils 3a to 3C according to the movement of the movable block B. The magnetomotive force generated at this time provides a propulsion force in a certain direction, and the movable block B moves forward. In addition, when moving the movable block B in the opposite direction, the positive and negative polarities of the voltages of the conductor portions 5a and 5b of the power supply board 5 may be reversed. [00121 Below, the characteristic configuration of this embodiment will be explained. In this embodiment, a flexible substrate is used as the power supply board 5, and the power supply board 5 is connected to a pair of upper and lower guide projections formed on the inner wall side of the upper part of the stator case 7 on the left side in the figure. 7a and 7b for attachment as shown in FIG. Then, in order to connect the power supply boards 5 of the stator blocks A to be connected,
A connecting plate 13 shown in FIG. 1 is used. This connection plate 13 is
It is a thin flat plate with a thickness of about 0.5 mm, made of a material such as phenol, and has copper foil parts 13a horizontally at the upper and lower ends.
are formed, respectively, and the upper and lower widths are made to substantially match the upper and lower widths of the power supply board 5. [0013] Connection between the power supply boards 5 using the connection plate 13 is performed as follows. First, one stator block A
The end of the power supply board 5 is bent toward the inner wall of the stator case 7 as shown in FIG. 1, and the connection plate 13 is inserted between the power supply board 5 and the inner wall of the stator case 7. However, at this time, the stator case 7 is inserted so that its rear end protrudes beyond the end thereof. Next, the other stator block A, in which the ends of the power supply board 5 are bent in the same way, is connected to the stator block A into which the connection plate 13 has been inserted, so that the ends are in contact with each other. At this time, the rear end of the connection plate 13 is inserted between the other power supply board 5 and the inner wall surface of the stator case 7, and the conductor parts 5a and conductor parts 5b of both power supply boards 5 are connected to either the upper or lower side. It is connected via the copper foil part 13a. In this way, 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 entire power supply board 5 is formed of a flexible substrate, but of course a method may be used in which only the end portion of the power supply board 5 that performs the connection is formed of a flexible substrate. [0014]

[Effects of the Invention] As described above, the present invention uses a power feeding board having flexibility such that at least its ends can be bent, and is provided with a connection plate on which two copper foil sections are formed to connect the power supply board. Bend the end of each power supply board of the stator block toward the inner wall surface of the stator case to which the power supply board is attached, and when connecting the stator blocks, bend the end of the power supply board of each stator block and the inner wall surface of the stator case. Since the conductor parts of each power supply board are connected to each other through the copper foil part of the connection board with a connection plate interposed, the power supply boards of the connected stator blocks can be connected to each other without soldering. , and bend the edge of the power supply board,
Since the only work required is to insert the connection plate between the power supply board and the inner wall surface of the stator case, there is an advantage that the connection work can be easily performed and therefore the work time can be shortened.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a method of 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 same as 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] Claim 1: Flat permanent magnets are magnetized with different polarities alternately at regular intervals in the longitudinal direction and magnetized with different polarities in the thickness direction, and are arranged in a cylindrical stator case in the longitudinal direction. A plurality of electromagnets are arranged in the longitudinal direction of the permanent magnets, each of which has a stator block arranged along the length of the permanent magnet and a coil wound in reverse around each side of a substantially U-shaped iron core with a permanent magnet interposed between both sides. A brush is provided on the movable block to which a coil for each of the electromagnets is connected, and the brush is in sliding contact with the movable block as the movable block moves. In a linear motor in which a stator block is provided with a power supply board on which a conductor part is formed to alternately apply positive and negative voltages to the coil, the power supply board is flexible enough to be bent at least at its ends, A connecting plate is provided with two copper foil sections, and the ends of the power supply boards of the stator blocks to be connected are bent toward the inner wall surface of the stator case to which the power supply boards are attached, and the stator blocks are connected to each other. When connected, a connection plate is interposed between the power supply board and the inner wall surface of each stator block, and the conductor parts of each power supply board are connected to each other via the copper foil part of the connection board. Connection structure of power supply board for linear motor.