JPH069522Y2 - Secondary conductor for linear motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention mainly relates to a secondary conductor (reaction plate) of a linear motor which is used as a propulsion means of a carriage.

(Prior Art) A secondary conductor of a linear motor is formed by coating a magnetic substance such as iron with a non-magnetic conductive material such as aluminum. As one means for improving the propulsion characteristics of the linear motor, It is known to use a so-called segment type secondary conductor in which the surface side of the magnetic body is processed into an uneven shape in the length direction, and the convex portion of the magnetic plate is exposed on the surface of the non-magnetic conductive material. Has been.

(Problems to be solved by the invention) However, in the conventional segment type secondary conductor as described above, a magnetic plate is cast or forged to be manufactured, or a thick magnetic plate is prepared, and cutting is performed on the surface of the magnetic plate. Since it will be processed, not only will the cost be significantly increased,
It was also difficult to manufacture a long secondary conductor because the pitch of the unevenness was limited.

Furthermore, when the primary body of the linear motor is mounted on the carriage and the secondary conductor is laid along the travel route, the secondary conductor laid in the horizontal curve route part of the travel route is bent in the horizontal direction. However, it is very difficult to bend the secondary conductor as described above in the horizontal direction.

(Means for Solving the Problems) In order to solve the above conventional problems, the present invention provides
A rod-shaped body made of a magnetic material is fixed to the wire made of a magnetic material at positions at appropriate intervals in the length direction in a direction orthogonal to the wire to form a magnetic body for a secondary conductor. The present invention proposes a secondary conductor for a linear motor, which is formed by embedding the wire in a strip-shaped non-magnetic conductive material that is wider than the width of the magnetic body so as to extend along the length direction.

(Embodiment) An embodiment of the present invention will be described below with reference to the attached exemplary drawings.

In FIG. 1 and FIG. 2, 1 is a carriage for transportation,
A guide rail 2 laid along the traveling route is supported movably via a supporting horizontal shaft wheel 3 and a steady rest vertical shaft roller 4, and a primary side main body 5 for a linear motor is attached to the bottom. . Reference numeral 6 denotes a secondary conductor for a linear motor that is laid along the traveling path, and the primary-side main body 5 of the carrier truck 1 faces the surface of the secondary conductor 6 with a minute gap.

However, by energizing the primary side main body 5, as is well known in the art, a magnetic force between the primary side main body 5 and the secondary conductor 6 exerts a thrust force on the carrier truck 1 to cause the carrier truck 1 to guide the rail 2. Will be traveling along.

The secondary conductor for a linear motor of the present invention can be implemented as the secondary conductor 6 in the system as described above, and as shown in FIGS. It is composed of a strip-shaped non-magnetic conductive material 8 in which a magnetic body 7 is embedded.

The magnetic body 7 includes two wires 9 made of a magnetic material such as iron.
a and 9b, and a rod-shaped body 10 having a rectangular cross-section made of a magnetic material such as iron, which is placed on the two wires 9a and 9b at equal intervals in a direction orthogonal to each other and fixed by welding or the like. ing. However, in the magnetic body 7, the surface 10a of the rod-shaped body 10 is exposed so as to be flush with the surface 8a of the non-magnetic conductive material 8 and the wires 9a and 9b are arranged along the length direction of the magnetic body 7. It is embedded in a non-magnetic conductive material 8 made of aluminum or the like, which is wider than the width and has a band shape.

By using the two wire rods 9a and 9b as described above, the rod-shaped bodies 10 can be stably supported in a parallel posture, but the number of the wire rods is not limited, and in some cases, 1
The number of books may be three or more. Also, the cross-sectional shape of the wire is not limited. For example, the cross section may be rectangular or flat.

The rod-shaped body 10 is not limited to one having a rectangular cross section, and a rod-shaped body having a round cross section can be used. Further, the surface 10a of the rod-shaped body 10 can also be thinly coated with the nonmagnetic conductive material 8.

In order to prevent the wires 9a and 9b or the rod-shaped body 10 and the non-magnetic conductive material 8 from being separated from each other at the adjacent interfaces, the wires 9a and 9b
The surface of b or the rod-shaped body 10 may be roughened, if necessary.

(Operation and Effect of the Invention) The secondary conductor for a linear motor of the present invention, which is implemented as described above, is functionally similar to a conventionally known segment type secondary conductor, but is made of aluminum or the like. The magnetic body combined with the non-magnetic conductive material is formed by placing rod-shaped bodies on the wire rod at appropriate intervals and fixing the rod-shaped bodies. Compared with the conventional one which does not become, the cost of the entire secondary conductor can be significantly reduced, and a long secondary conductor can be easily and easily manufactured.

Further, in the transport system in which the secondary conductor is laid along the traveling route as in the embodiment, even when the secondary conductor has to be bent in an arc shape in the horizontal direction in the horizontal curve route portion,
Since a magnetic body that is generally harder than a non-magnetic conductive material has a ladder structure or a structure close to this as described above, there is a case where the magnetic body is a thick magnetic plate whose surface side is cut into an uneven shape. In comparison, horizontal bending can be easily performed on the entire secondary conductor. Of course, vertical bending is also extremely easy, so that the layout of the traveling route can be freely set.

[Brief description of drawings]

FIG. 1 is a partial vertical front view showing a linear motor-driven carriage, FIG. 2 is a vertical side view of the same portion, and FIG. 3 is a vertical perspective view of a secondary conductor according to an embodiment of the present invention. Is a vertical sectional front view. 1 ... Transport carriage, 2 ... Guide rail, 5 ... Primary body for linear motor, 6 ... Secondary conductor for linear motor, 7 ... Magnetic body, 8 ... Strip-shaped non-magnetic conductive material, 9a ，
9b ... wire rod, 10 ... rod-shaped body.

Claims (1)

[Scope of utility model registration request] 1. A magnetic material for a secondary conductor is formed by fixing rod-shaped members made of a magnetic material in positions orthogonal to the wire at positions on a wire made of a magnetic material at appropriate intervals. ,
A secondary conductor for a linear motor, which is obtained by embedding the magnetic material in a strip-shaped nonmagnetic conductive material having a width wider than that of the magnetic material so that the wire is along the length direction.