JPH03277163A - Linear motor - Google Patents

Abstract

PURPOSE:To fix a permanent magnet easily and reliably in a specified state by forming a part, for mounting a resin holder for fixing the permanent magnet to a guide rail on the rear surface of a ceiling board, on the guide rail. CONSTITUTION:A permanent magnet 1 is fixed to a guide rail 7 by means of a magnet holder 17 made of resin. Consequently, recesses 1a opening to the side are formed at the opposite sides at one end of the permanent magnet 1 and the recesses 1a are widened at the tip thereof. A groove 17a having profile matching to the cross section at one end of the permanent magnet 1a is made in the rectangular parallelepiped magnet holder 17, and the permanent magnet 1a is fitted at one end thereof to the groove 17a of the magnet holder 17 and fixed in place. Such a constitution facilitates fixing of the guide rail 7 of the permanent magnet 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a linear motor used for conveyance.

[Conventional technology J Recently, research has been done on using linear motors for conveyance, W
F2 is emitted, and this type of linear motor has flat permanent magnets arranged along the longitudinal direction, magnetized with different polarities in the thickness direction and alternately magnetized with different polarities at regular intervals in the longitudinal direction. A stator block and a plurality of electromagnets each having a coil wound thereon in a reversely wound manner are arranged in a row in the longitudinal direction of the permanent magnet on each side of a substantially U-shaped iron core in which a permanent magnet is interposed between both sides. It consists of a formed mover block,
There is a so-called moving coil type in which the movable block is propelled by selectively passing current through the coils of each electromagnet. Here, the mover block is equipped with a brush in which a coil for each electromagnet is wired, and the stator block has a rectangular cylindrical shape in which the permanent magnet is arranged over the entire length of the center of the lower surface of the top plate. and a power feeding board formed with a conductor portion on which the brush slides and applies positive and negative voltages alternately to the coil via the brush as the movable block moves.

I Problems to be Solved by the Invention] By the way, in the above-mentioned linear motor, the permanent magnets are attached to the guide rail by adhesive or caulking.
This permanent magnet needs to be attached to the guide in parallel along the lengthwise direction of the guide and perpendicularly in the vertical direction, which poses a problem in that it is difficult to attach the permanent magnet.

In addition, since the mover block receives the attraction force acting between the iron core and the permanent magnet and the force when the brush and the power supply board come into sliding contact, an air gap in the width direction of the guide rail between the permanent magnet and the iron core is generated. There was a problem that it was difficult to hold the iron core, and in some cases, the iron core and the permanent magnet rubbed against each other, causing problems such as weakening the propulsive force of the mover block or chipping the permanent magnet.

The present invention has been made in view of the above two points, and its first purpose is to facilitate the installation of permanent magnets and to ensure that they are installed in a predetermined state (without rubbing). The second purpose is to be able to secure the dark F-gap between the iron core and the permanent a stone.

Means for Solving the IW Problem] In order to achieve the above j-th objective, the present invention includes a magnet holder made of a resin material for attaching a permanent magnet to a guide rail, and this magnet holder is attached to the bottom surface of a top plate. A mounting portion is formed on the guide rail.

In order to achieve the second object, guide portions for guiding the tip of the iron core of the mover block are formed on both sides of the permanent magnet of the magnet holder.

[Function 1] As described above, the present invention includes a magnet holder made of TH resin material for attaching a permanent magnet to a guide rail, and a mounting portion for attaching the magnet holder to the lower surface of the top plate is formed on the guide rail. , fit the permanent magnet into the magnet holder,
It can be attached to the mounting part of the guide rail easily and in a predetermined state.

In addition, by forming guide parts on both sides of the permanent magnet of the magnet holder to guide the tip of the iron core of the mover block, the position of the iron core is determined by the guide part and the air gap between the iron core and the permanent magnet is reduced. This is so that it can be ensured.

[Example 1] An embodiment of the present invention is shown in FIGS. 1 to 7.

The linear motor of this embodiment is of a moving coil type, and has a structure in which a movable block B slides along a stator block A.

As shown in FIG. 4 or 5, the stator block A has a rectangular cylindrical shape and has a guide groove 9 along the longitudinal direction in the center of the bottom plate 7c. A long γ-id rail 7 provided, a long permanent magnet 1 disposed over the entire length of the center of the top plate 7a of this guide rail 7, and one side plate 7 of the guide rail 7.
The power supply board 5 is attached to the inner surface of the mover block B and supplies power to the coil 3 of the mover block B.

The permanent magnet 1 is magnetized alternately with N poles and S poles at a constant pitch in the longitudinal direction, and also with N poles in the thickness direction.
The pole and south pole are magnetized. The length of a 1M magnet piece consisting of an N pole and an S pole in the longitudinal direction of this permanent magnet 1 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 thereof that meanders vertically at a right angle at regular intervals, and the upper and lower parts separated by this insulating part 5c are used as conductors 5a and 5b. be. Then, positive and negative voltages are applied from the respective conductor portions to the coils 3 of the mover block B, respectively. Here, the width of the part protruding toward the center of each conductor part 5a, 5b is formed to be L/3, and the width of the insulating part 5c located between both conductors 95m and Sb is formed to be /6. It is.

The mover pro 7B 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 5. It has a three-phase structure in which three electromagnets 8 each consisting of a brush 4 and a brush 4 are arranged in a row. Note that the other ends of the coils 3 are commonly connected. The length of each electromagnet 8 along the longitudinal direction of the guide rail 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 l, f, < L/3, and the length of the electromagnet 8 when the coil 3 is wound is also the above L/3. Try not to exceed it. A brush holder 14 made of insulating material is provided for each electromagnet 8.
The distance between the brushes 4 attached to the movable block B is L/3, and these brushes 4 contact the center of the power supply board 4.

A connecting body 10 for connecting objects to be conveyed, such as Wc products, is integrally fixed to the mover block B, and a connecting piece 10g protruding from the connecting body 10 is made to protrude from the guide groove 9 to complete the mover block. B is housed within the guide rail 7.

Incidentally, on both sides of the connecting body 10, there are provided cores for smooth movement of the movable block B. Also,
The holes 16 formed in the connecting piece 10a are for connecting objects to be transported.

In this linear motor, with the above-described structure, a current is constantly passed from the power supply board 5 to any two of the three-phase coils 3a to 3c, and the magnetomotive force generated at this time obtains a propulsive force in a fixed direction. The mover block B moves forward. In addition, when moving the movable block B in the opposite direction, the conductor portion 5a of the power supply board 5.

The polarity of the voltage of 5b may be reversed.

By the way, the linear motor of this embodiment has the following configuration and structure in order to facilitate the attachment of the permanent magnet 1 to the stop rail 7 and to attach the permanent magnet 1 parallel to the longitudinal direction of the guide rail 7 and perpendicularly in the vertical direction. There is. That is, in this embodiment, the permanent magnet 1 is attached to the guide rail 7 using a magnet holder 7 made of a resin material. Therefore, on both sides of one end of the permanent magnet 1,
As shown in FIG. 1, gates MS1a each opening laterally are formed, and! ! The width of the tip of the first part 1a is made wider. Then, the permanent magnet 1a is placed in the rectangular parallelepiped magnet holder 17.
A concave groove 17& that matches the cross-sectional shape of 1*S is formed, and w
As shown in Fig. J3, one end of the permanent magnet [&] is attached to the Fl groove 17a of the magnet holder 17 by fitting it in a concave-convex manner.

Note that this magnet holder 17 does not necessarily have to span the entire length of the A electromagnet 1, and may be divided so as to be attached only at a proper location, and furthermore, the magnet holder 17 may be integrally molded with the permanent magnet 1.

As shown in FIG. 5, the top plate 7a of the guide rail 7 is provided with a mounting portion 7d into which the magnet holder 17 is fitted from the longitudinal direction. In this way, the permanent magnet 1 is fitted into the magnet holder 17, and the mounting portion 7d of the guide rail 7 is
Since it is only necessary to attach the permanent magnet 1 to
Furthermore, when using the above-mentioned magnet holder 17 made of a resin material, the tip of the iron core 2 may be formed into a round shape and the magnet holder 17 may be used as a slip plate for smoothing the sliding movement of the mover block B. can. Note that the magnet holder 17 may have a structure divided into left and right parts as shown in FIG.

[Example 21 Other embodiments of the present invention are shown in FIGS. 8 and 9.

This embodiment is basically a linear motor having the same structure as the first embodiment, but in this embodiment, the tip of the iron core 2 of the mover block B is placed on both sides of the permanent magnet 1 of the magnet holder 17. It is characterized by forming a guide portion for guiding. However, although the shapes of the portions of the permanent magnet 1 and the magnet holder 17 that are fitted with the recesses and recesses are slightly different, this embodiment is substantially the same as the second embodiment. Note that when the permanent magnet 1 is attached to the magnet holder 17, the four locations 18 formed on both sides of the permanent magnet 1
functions as a guide part. In other words, as shown in FIG.
The core 2 is positioned by inserting the tip of the core 2 and holding the outer surfaces of both sides of the core 2 on the inner surface of the recess 18. In this way, an air gap in the width direction of the guide rail 7 between the iron core 2 and the permanent magnet 1 can be ensured. Note that it is preferable to attach a slip member 19 to the tip of the iron core 2 to reduce the coefficient of friction between the iron core 2 and the magnet holder 17).

[Effects of the Invention] As described above, the present invention includes a magnet water lug made of a resin material for attaching a permanent magnet to a guide rail, and a mounting portion for attaching the magnet holder to the bottom surface of the top plate is formed on the guide rail. Therefore, the permanent magnet can be easily and reliably attached in a predetermined state by fitting it into the magnet holder and attaching it to the mounting portion of the guide rail.

In addition, if 441 parts for guiding the tip of the iron core of the mover block are formed on both sides of the permanent magnet of the magnet holder, 441 parts can be formed on both sides of the permanent magnet of the magnet holder.
By positioning the iron core at a certain point, it is possible to reliably secure an open air gap between the iron core and the permanent magnet.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a permanent magnet according to an embodiment of the present invention, Fig. 2 is a perspective view of a magnet holder, Fig. 3 is a perspective view showing a state in which the magnet holder is attached to a permanent magnet, and Fig. 4 is a linear A partially cutaway perspective view showing the structure of the motor, vJ5 is a sectional view of the linear motor, FIG. 6 is a perspective view of the mover block, FIG. 7 is a sectional view showing another magnet holder, and FIG. A perspective view of a permanent magnet and a magnet holder of another embodiment, and FIG. 9 is a sectional view of a near motor equipped with the same as above. A is a stator block, B is a mover block, 1 is a permanent magnet, 2 is an iron core, 3 is a coil, 4 is a brush, 5 is a power supply board, 7 is a guide rail, 7d is a mounting part, 17 is a magnet holder, 18 is a concavity.

Claims (2)

[Claims] (1) A stator block in which flat permanent magnets, which are magnetized with different polarities in the thickness direction and alternately magnetized with different polarities at regular intervals in the longitudinal direction, are arranged along the longitudinal direction, and the permanent magnets are arranged on both sides. a mover block formed by arranging a plurality of electromagnets in the longitudinal direction of the permanent magnets each having a reversely wound coil wound around each side piece of a substantially U-shaped iron core interposed therebetween; A brush to which a coil for each of the electromagnets is connected is provided on the movable block, and the brush makes sliding contact with the permanent magnet, and as the movable block moves, positive and negative voltages are alternately applied to the coils. In a linear motor in which a stator block is constituted by a power supply board on which a conductor portion is formed and a rectangular cylindrical guide rail to which these permanent magnets and the power supply board are attached, the permanent magnet is attached to the guide rail and is made of a resin material. Equipped with a magnet holder,
A linear motor characterized in that a mounting portion for mounting this magnet holder on the lower surface of a top plate is formed on a guide rail. (2) The linear motor according to claim 1, wherein guide portions for guiding the tip of the iron core of the mover block are formed on both sides of the permanent magnet of the magnet holder.