JPH05184126A - Linear motor with rotor - Google Patents

Abstract

PURPOSE:To improve accuracy of mounting pitch and working efficiency in a mounting step, where a permanent magnet is mounted on a yoke in a rotor. CONSTITUTION:On both sides of a linear stator coil, block-shaped permanent magnets 2 are provided in line with their polarity reversely arranged side by side. A yoke 3 is mounted closely on the rear of these permanent magnets 2. Moreover, a comb 12 of a rotor 11 has each pair of C-shaped members oppositely provided like a comb in shape, and the permanent magnets are provided between teeth of the comb 12. After the yoke 3 is mounted with a bolt 14 fit in a tapped hole 13, the permanent magnet 2 is bonded. In this case, the top of the comb 12 is preferably made lower than that of the permanent magnet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a mover of a linear motor.

[0002]

2. Description of the Related Art FIG. 3 is a perspective view showing a conventional method of assembling a mover, and FIG. 4 is a front view of the linear motor shown in FIG. In these figures, block-shaped permanent magnets 2 having opposite polarities are linearly arranged on both sides of a linear stator coil 1, and a yoke 3 is closely attached to the back surface of the permanent magnet 2.
A mover 5 having a pair of yokes 3 fixed by bolts 4 is linearly guided by a linear guide 6. As shown well in FIG. 3, the permanent magnets 2 have the yokes 3 with the spacers 7 alternately sandwiched therebetween.
And then fixed to the mover 5.

[0003]

In the above-mentioned conventional example, the workability at the time of adhering the permanent magnets sandwiched alternately with the spacers is poor, and the accuracy of the mounting pitch of the permanent magnets is not good. Regarding workability, since the permanent magnet is strong and a repulsive force acts between it and the adjacent magnet, the permanent magnet may be repeatedly chipped or injured by pinching a finger. If the mounting pitch is bad, cogging will occur and the movement will not be smooth. Even if a jig is used, there are many spacers and workability and mounting pitch are not significantly improved.

An object of the present invention is to provide a linear motor provided with a mover which is capable of improving workability when attaching a permanent magnet to a yoke of a mover and accuracy of attachment pitch.

[0005]

A linear motor provided with a mover of the present invention is closely attached to a comb-shaped mover in a linear direction, a permanent magnet arranged between the combs, and a back surface of the permanent magnet. It consists of a yoke. At this time, the tip of the comb is lower than the tip of the permanent magnet, or the pair of the movers face each other and have a U-shaped cross section.

[0006]

In this invention group, reference is made to FIG. Since the permanent magnets 2 are arranged between the combs 12 of the movable element 11 having a comb shape in the linear direction in which the yoke 3 is backed in advance, the workability when mounting the permanent magnets is good, and the mounting pitch is accurate. ..
At this time, if the tip of the comb 12 is made lower than the tip of the permanent magnet 2, the comb is easy to manufacture, and if the pair of the movers 11 face each other and have a U-shaped cross section, the structure is simple. High rigidity.

[0007]

1 is a perspective view showing a method of assembling a mover of an embodiment, and FIG. 2 is a front view of the linear motor shown in FIG. In these figures, block-shaped permanent magnets 2 having opposite polarities are linearly arranged on both sides of a linear stator coil 1, and a yoke 3 is closely attached to the back surface of the permanent magnet 2. A feature of the embodiment is that the permanent magnets 2 have a pair of opposed combs 12 of a movable element 11 that has a U-shaped cross section and is comb-shaped in a linear direction.
Is placed between. As best shown in FIG. 1, the comb 12
After attaching the yoke 3 with the bolt 14 to the screw hole 13 provided in, the permanent magnet is bonded. The tip of the comb 12 may be lower than the tip of the permanent magnet 2, and the pair of U-shaped movable elements 11 may be formed.
May be divided into left and right and integrated with a new block-shaped mover. The linear guide 6 is attached to the mover 11.

[0008]

According to the present invention, since the permanent magnets are arranged between the combs of the comb-shaped mover linearly backing the yoke in advance, the workability when attaching the permanent magnets is improved. Well, the effect is that the mounting pitch is accurate. At this time, if the tip of the comb is made lower than the tip of the permanent magnet, the comb is easy to manufacture, and if the pair of movers face each other and have a U-shaped cross section, the structure is simple and the rigidity is high. There is an effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing a method of assembling a mover of an embodiment.

FIG. 2 is a front view of the linear motor of FIG.

FIG. 3 is a perspective view showing a method of assembling a mover of a conventional example.

FIG. 4 is a front view of the linear motor of FIG.

[Explanation of symbols]

 1 Stator Coil 2 Permanent Magnet 3 Yoke 5 Mover 6 Linear Guide 7 Spacer 11 Mover 12 Comb 13 Screw Hole 14 Bolt

Claims (3)

[Claims] 1. A linear motor provided with a mover comprising a comb-shaped mover in a linear direction, a permanent magnet arranged between the combs, and a yoke closely attached to the back surface of the permanent magnet. .. 2. A linear motor having a mover according to claim 1, wherein the tip of the comb is lower than the tip of the permanent magnet. 3. A linear motor having a mover according to claim 1 or 2, wherein a pair of said movers face each other and have a U-shaped cross section.