JP2522450B2 - Linear motor - Google Patents

Description

The present invention relates to a linear motor used for transportation.

[Conventional technology]

Conventionally, the following types of linear motors have been known.

This linear motor includes a stator block and a mover block.

The stator block includes a tubular guide rail, a plate-shaped permanent magnet magnetized in the thickness direction so that the longitudinal direction alternates with different poles at regular intervals, and a positive and negative voltage conductive portion. And is formed by fixing one end surface of the permanent magnet and the power feeding substrate along the longitudinal direction of the inner wall of the guide rail.

The mover block is an electromagnet having a plurality of substantially U-shaped iron cores arranged in the longitudinal direction of the permanent magnet, in which coils are wound in opposite windings on opposite pieces and the thickness direction of the permanent magnet is interposed between the opposite pieces. And a brush connected to the coil and fixed to the electromagnet.

Then, the brush is brought into sliding contact with the power supply substrate and positive and negative voltages are alternately applied to the coils, so that the mover block moves in the longitudinal direction of the tubular guide rail.

[Problems to be Solved by the Invention]

In the above-mentioned conventional linear motor, when the guide rail is cut to a required length by a manual or electric iron saw, etc., the cutting powder of the guide rail and permanent magnets is scattered inside the guide rail and the mover is moved. There is a problem that the movement of the block is hindered and the life is shortened.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a linear motor that does not scatter the cutting powder of the guide rail into the inside of the guide rail that moves the mover block.

[Means for solving the problem]

In order to solve the above-mentioned problems, a linear motor of the present invention includes a cylindrical guide rail and a plate-shaped permanent magnet magnetized in the thickness direction so that the longitudinal direction alternately has different poles at regular intervals. And a power supply board provided with a conductive portion for positive and negative voltages, and a stator block formed by fixing one end surface of the permanent magnet and the power supply board along the longitudinal direction of the inner wall of the guide rail, and a coil on the opposite piece. Is connected to the coil with electromagnets in which a plurality of substantially U-shaped iron cores, each of which has the thickness direction of the permanent magnet wound in reverse winding and is interposed between the opposing pieces, are arranged in a row in the longitudinal direction of the permanent magnet. A linear motor in which a brush and a mover block having the mover block are slidably in contact with the power supply substrate and positive and negative voltages are alternately applied to the coils to move the mover block; The terminal filled the inner space It has a configuration which has become disconnected state with over-like resin layer.

[Action]

According to the linear motor of the present invention, the end of the guide rail is in a state of being cut together with the jelly-like resin layer with which the inner space is filled. It does not enter the inside of the moving resin layer, but only scatters on the outside.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

This linear motor includes a stator block A and a mover block B.

First, the stator block A is configured by the guide rails 1, the permanent magnets 2, and the power feeding board 3 as follows.

The guide rail 1 is made of a metal material such as aluminum and is
As shown in the figure, the cross section is formed in a tubular shape having a substantially rectangular shape, a guide groove 1a is provided in the center of one side thereof, and an iron core 4a described later is provided on the inner wall of the guide rail 1 located on the opposite side of the guide groove 1a. A slip plate 1b with a small friction coefficient that is provided to facilitate sliding contact
Is provided. The slip plate 1b is omitted in the perspective view of the guide rail 1 in FIG. The permanent magnet 2 is formed in a flat plate shape, one end surface of which is embedded in the slip plate 1b and fixed along the longitudinal direction of the inner wall of the guide rail 1. And as shown in FIG.
It is magnetized in the thickness direction so that the longitudinal direction alternates with different poles at regular intervals. Here, the length of one set of magnet pieces consisting of N pole and S pole in the longitudinal direction is L.

As shown in FIG. 7 (a), the power supply board 3 is formed on one surface of a flat board by forming an insulating part 3a meandering vertically at a regular interval in the central part and separated by this insulating part 5a. The upper and lower portions of the upper and lower portions are formed as a positive voltage conductive portion 3b and the lower portion is formed as a negative voltage conductive portion 3c. Here, the width of the insulating portion 3a in the longitudinal direction is L / 6, and the width of the conductive portions 3b and 3c in the longitudinal direction is L / 3. The power supply board 3 has a guide rail 1 on which the magnetic pole surface of the permanent magnet 2 faces.
It is fixed to the inner wall on one side.

Next, the mover block B is configured by the electromagnet 4 and the brush 5 as follows.

The electromagnet 4 is formed by winding opposite coils 4d and 4c of a substantially U-shaped iron core 4a with coils 4d wound in reverse.

The brush 5 is fixed to one outer side of the facing pieces 4b and 4c of the iron core 4a.

In the mover block B, the three electromagnets 4 have a T-shaped cross section 4e so that the facing pieces 4b and 4c are aligned.
The coils 4d are arranged in a row and fixed integrally, and each coil 4d is constituted by a three-phase electromagnet having one end connected to each brush 5 and the other end commonly connected. At this time, the lengths of the electromagnets in the arranging direction are set not to exceed L / 3, and the distance between the brushes 5 is set to L / 3.

In the mover block B, the thickness of the permanent magnet 2 is interposed between the facing pieces 4b and 4c of the iron core 4a, the brush 5 is positioned so as to be in sliding contact with the center of the power feeding board 3, and the connecting body 4e is provided. The vertical piece is housed in the stator block A so as to protrude from the guide groove 1a of the guide rail 1. The connecting body 4e having a T-shaped cross section has a vertical piece which is a connecting piece 4f in which a conveyed object is connected to a hole 4g provided with a conveyed object such as a decorative article at a tip portion, and a horizontal piece at both ends. A roller 4h is provided for smooth movement of the mover block B.

By configuring the operation of this linear motor as described above, since the brush 5 comes into sliding contact with the power supply substrate 3 and positive and negative voltages are alternately applied to the coil 4d, the three-phase coil 4d In the state shown in FIG. 7 (b) in which a current is constantly applied to any of the two phases and the two electromagnets at both ends are excited, it acts between the magnetic pole of the electromagnet and the magnetic pole of the permanent magnet 2. The mover block B advances in the direction of the arrow by L / 6 by the propulsive force that is generated, and the two electromagnets at the rear end are excited, resulting in the state shown in FIG. Go further by 6. After that, L / 6 is continuously advanced, and L / 6 is advanced by 6 steps to return to the state of FIG. In this way, the mover block B smoothly advances in the longitudinal direction of the stator block A.
When moving the mover block B in the opposite direction,
The positive and negative voltages of the conductive parts 3b and 3c of the power supply board 3 may be reversed.

By the way, in the present embodiment, as shown in FIG. 1, resin is sprayed from the guide groove 1a to fill the inner space of the predetermined position of the guide rail 1, that is, the position where the guide rail 1 is to be cut, by filling. As shown in FIGS. 2 and 3,
A resin layer 6 is formed so as to close the internal space of the guide rail 1.

This resin is quick-drying and forms a jelly-like and highly clay-like layer in a dry state, for example, a silicone resin or a trade name Aron Alpha.

As shown in FIG. 3, the resin layer 6 is almost at the center position.
When 6a is cut with an iron ball or the like, as shown in FIG. 4, the end of the guide rail 1 is in a state of being cut together with the resin layer 6, and the end cap 6b opened on one side is fixed to the guide rail 1. If it is fitted on the outer surface of the terminal, the cut surface is not visible from the outside and the appearance is good.

〔The invention's effect〕

Since the linear motor of the present invention is configured as described above, since the end of the guide rail is in a state of being cut together with the jelly-like resin layer filling the inner space, the cutting powder when the cutting is performed. Does not enter the inside of the resin layer in which the mover block moves, is scattered only on the outside, and does not shorten the life.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a resin is sprayed onto the inner space of the guide rail according to an embodiment of the present invention, and FIG. 2 is a resin formed in the inner space of the guide rail. FIG. 3 is a cross-sectional view of the layer, FIG. 3 is a plan view showing a resin layer formed in the inner space of the guide rail in the same, FIG. 4 is a perspective view showing a state in which the guide rail in the same is cut, and FIG. The perspective view which shows the structure of the principal part same as the above. 6 is a cross-sectional view of FIG. 5, FIG. 7 (a) is a front view of the power feeding board, and FIGS. 7 (b) and 7 (c) are explanatory views showing the operating state of the mover block. . A ... Stator block, 1 ... Guide rail, 2 ... Permanent magnet, 3 ... Power supply board, 3b, 3c ... Conductive part, B ... Mover block, 4 ... Electromagnet, 4a ... Iron core, 4b, 4c ... Opposing piece, 4d ... Coil, 5 ... Brush, 6 ... Resin layer.

Claims (1)

(57) [Claims] 1. A power supply board provided with a tubular guide rail, a plate-shaped permanent magnet magnetized in the thickness direction so as to have different poles alternately in the longitudinal direction at regular intervals, and a conductive portion for positive and negative voltages. And a stator block formed by fixing one end surface of the permanent magnet and the power feeding substrate along the longitudinal direction of the inner wall of the guide rail, and a coil wound around the facing piece in reverse winding, respectively, in the thickness direction of the permanent magnet. A mover block having an electromagnet in which a plurality of substantially U-shaped iron cores interposed between both facing pieces are arranged in a row in the longitudinal direction of the permanent magnet, and a brush connected to the coil. In the linear motor in which the brush slides on the final electric circuit board and positive and negative voltages are alternately applied to the coils to move the mover block, the guide rail is provided with a jelly-like resin layer in which the end fills the inner space. It is in a disconnected state A linear motor characterized by that.