JP2522451B2 - 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.

In the mover block, a plurality of substantially U-shaped iron cores in which the coils are wound around the facing pieces in reverse winding and the thickness direction of the permanent magnet is interposed between the facing pieces are arranged in a row in the longitudinal direction of the permanent magnets. It is formed by having an electromagnet 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]

Since the conventional linear motor described above is too long during use, when cutting the guide rail to the required length with a manual or electric iron saw, etc., the cutting powder of the guide rail and permanent magnets is inside the guide rail. There is a problem that the movement of the mover block is hindered by the confusion and that the guide rail is tubular and is easily deformed.

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

[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 flat permanent magnet magnetized in the thickness direction so that the longitudinal direction is alternately different poles at regular intervals. , A power supply board provided with a positive and negative voltage conductive portion, and a stator block formed by fixing one end face 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. An electromagnet in which a plurality of substantially U-shaped iron cores, each of which is wound in a reverse winding and has a thickness direction of the permanent magnet 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. A linear motor in which a brush slides on a power supply board and positive and negative voltages are alternately applied to the coils to move the movable block, the guide rail having an inner cross section. Has an outer shape that matches the shape Closing member may also block the inner space of which position in the longitudinal direction Te has a attached configurations in the terminal position.

[Action]

According to the linear motor of the present invention, when it is desired to cut the guide rail to a required length because it is too long during use, the blocking member attached to the terminal position of the guide rail is cut in the longitudinal direction of the guide rail. Move to, fix the outside surface of the guide rail with a vise, and cut at the position outside the closing member with an iron saw, etc.
The closing member is in a state of closing the inner space of the guide rail, and therefore the cutting powder does not enter the inside of the closing member in which the mover block moves, but only scatters on the outside. Serves as the guide core of the guide rail, and the guide rail can be cut without being deformed.

〔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 into a tubular shape having a substantially short shape, and a guide groove 1a is provided at the center of one side thereof. A slip plate having a small friction coefficient is provided so that the sliding contact can be made easily. The guide rail 1 in FIG.
The slip plate 1b is omitted in the perspective view of 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. Then, as shown in FIG. 5, the magnets are magnetized in the thickness direction so that the longitudinal direction is alternately opposite 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 is fixed to the inner wall on one side of the guide rail 1 facing the magnetic pole surface of the permanent magnet 2.

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 this embodiment, the closing member 6 shown in FIG. 2 is additionally provided.

The closing member 6 is made of a plastic material and has a thickness of 10 mm.
The outer shape is approximately U-shaped to match the inner cross-sectional shape of the guide rail 1, more specifically, the short cross section of the guide rail 1 and the cross-sectional shape of the permanent magnet 2, and a screw hole 6b is provided on one side surface thereof. Has been. Then, holes 1c are provided at regular intervals in the longitudinal direction of the guide rail 1, and the closing member 6 is provided with the guide rail 1 as shown in FIG.
The screw hole 6b is aligned with the hole 1c at the end position of and is screwed and fixed. At this time, the inner space of the guide rail 1 is closed by the closing member 6, and the inner space of the guide rail 1 has the same cross-sectional shape at any position in the longitudinal direction. By moving the rail 1 in the longitudinal direction, the inner space at any position can be closed.

In such a linear motor, when it is desired to cut the guide rail 1 to a required length because it is too long during use, the closing member 6 attached to the end position of the guide rail 1 as shown in FIG. 1 is used. As shown in FIG. 3, the guide rail 1 is moved to the cutting position in the longitudinal direction, and the outer surface of the guide rail 1 is fixed with a vise 7. Then the fourth
As shown in the figure, when the guide rail 1 is cut at a position outside the closing member 6 with an iron saw or the like, at this time, the closing member 6
Since the inner space of the guide rail 1 is closed, the cutting powder does not enter the inside of the closing member 6 in which the mover block B moves and only scatters outside. The closing member 6 serves as a guide core of the guide rail 1, and the guide rail 1 can be cut without being deformed. Next, when the closing member 6 is pulled out to the outside, the convoluted cutting powder is swept out and removed by the closing member 6. Then, the closing member 6 is inserted into the guide rail 1 again, and is inserted into the hole 1c near the end of the guide rail 1,
The screw hole 1b of the closing member 6 may be fixed together.

In this embodiment, the shape of the closing member 6 is U-shaped when the inner cross section of the guide rail 1 is short as shown in FIG. 1, but as shown in FIG. Even if the inner wall of 1 has some irregularities, the closing member 6 conforms to its shape so as to close the inner space thereof.
Should be formed.

〔The invention's effect〕

Since the linear motor of the present invention is configured as described above, when it is desired to cut the guide rail to a required length because it is too long in use, the closing member attached to the end position of the guide rail is used as the guide rail. Move to the cutting position in the longitudinal direction of the guide rail, fix the outer surface of the guide rail with a vise, and cut at a position outside the closing member with an iron saw, etc., at this time, the closing member closes the inner space of the guide rail. Therefore, the cutting powder does not enter the inside of the closing member in which the mover block moves and only scatters on the outside, and the closing member serves as the guide core of the guide rail. Can be cut without being deformed, which facilitates cutting.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a closing member of an embodiment of the present invention is attached, FIG. 2 is a perspective view of the same closing member, and FIG. 3 is a vise at the cutting position of the same closing member. 4 is a perspective view showing a state in which the guide rail is cut, and FIG. 5 is a perspective view showing a structure of a main part of the same. 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 pieces, 4d ... Coil, 5 ... Brush, 6 ... Closing member.

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 a linear motor in which the brush slides on the power supply board and positive and negative voltages are alternately applied to the coils to move the mover block, the guide rail has an outer shape that matches the inner cross-sectional shape, and the longitudinal direction Block the inner space of any A linear motor, wherein the closing member to be obtained is attached to the terminal position thereof.