JPH0311970A - Primary iron core assemblage of linear pulse motor - Google Patents

Abstract

PURPOSE:To prevent the positional shift, magnetic shortcircuit or flux leakage by arranging four outside bridge sections for coupling the outside sections of adjoining pole tooth groups and one cross bridge section for coupling pole tooth groups on a diagonal in the central section thereafter integrating them and cutting. CONSTITUTION:Each pole tooth group has a plurality of pole teeth 4a, 4b, 4c, 4d and the outside of adjoining pole tooth groups are coupled through outside bridge sections 4e, 4f, 4g, 4h. Center sides are coupled through a cross bridge 4m for coupling two pole tooth groups arranged on a diagonal then the pole tooth groups 4 are overlapped so that the pole tooth groups 4a-4d are positioned on the upper face of a salient pole 2a and bonded with resin, thereafter the cross bridge section 4m is cut off and removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a primary core assembly for a linear pulse motor.

[Conventional technology]

The primary core assembly of a conventional linear pulse motor uses a magnetic pole tooth plate as illustrated in FIG. That is, each magnetic pole tooth plate 14 has a plurality of magnetic pole teeth 14a or one magnetic pole tooth plate.
4b, 14c, or 14d, the outer sides of the adjacent magnetic pole tooth groups are connected by outer bridge parts 14e and 14f and 14g and 14h, and the inner sides are connected by central bridge parts 14i, 14j, and 14. It has a configuration in which it is connected by 1 and 14 holes.

[Problem to be solved by the invention]

As mentioned above, in order to increase the strength of the magnetic pole tooth plate of the primary core assembly of a conventional linear pulse motor, the outer and inner sides of adjacent magnetic pole tooth groups are connected by a bridge portion, so that the bias magnet The disadvantage is that the magnetic path is short-circuited by these, deteriorating the characteristics of the linear pulse motor.

[Means to solve the problem]

The primary core assembly of the linear pulse motor of the present invention has four sets of magnetic pole teeth each having a plurality of magnetic pole teeth formed by etching or the like, and the outer sides of adjacent magnetic pole teeth groups are connected by an outer bridge portion. , a magnetic pole tooth plate is used in which the centers of diagonally arranged magnetic pole tooth groups are connected by an intersecting bridging part, and the intersecting bridging part is separated and removed by machining from the assembly.

That is, the primary core assembly of the linear pulse motor of the present invention includes a bias magnet, a pair of primary cores having two parallel convex poles provided on the upper surface and sandwiching the bias magnet; An excitation winding disposed on each of the convex poles of the secondary core, and a magnetic pole tooth plate having four sets of magnetic pole teeth each having a plurality of magnetic pole teeth at positions corresponding to the convex poles, the magnetic pole teeth The magnetic pole tooth plate connects the outer parts of adjacent magnetic pole tooth groups in a primary core assembly of a near-pulse motor, in which a group is superimposed on the corresponding convex pole and then fixed with resin to form an integral body. It has four outer bridge parts and one cross bridge part that connects and intersects the magnetic pole tooth groups located diagonally in the center, and the cross bridge part is cut after being formed integrally. It was separated by

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is an exploded perspective view showing the main parts of an embodiment of the present invention;
2 is a perspective view showing details of the magnetic pole tooth plate of the embodiment shown in FIG. 1. FIG.

As shown in FIGS. 1 and 2, the magnetic pole tooth plate 4 has a plurality of magnetic pole teeth 4a, 4b, 4C, and 4d formed by etching or the like. or 4b, 4c, or 4d), and the outer sides of adjacent magnetic pole tooth groups are connected by outer bridge portions 4e and 4f and 4g and 4h. Further, their center sides are connected by a cross-bridge portion 4m that connects two diagonally arranged magnetic pole tooth groups. A pair of primary cores 2 that sandwich and hold the bias magnet 1 are formed in parallel and have two convex poles 2a, and an excitation winding 3 is attached to each of the convex poles 2a of the primary cores 2. It is arranged. After stacking the magnetic pole tooth groups 4 so that the magnetic pole tooth groups 4a to 4d are located on the upper surface of the convex pole 2a, they are fixed with resin and separated by cutting the cross-bridge portion 4m of the magnetic pole tooth plate 4 by machining. and remove it.

〔Effect of the invention〕

As explained above, the primary core assembly of the linear pulse motor of the present invention connects the outer sides of the adjacent magnetic pole tooth groups of the magnetic pole tooth plate by the outer bridge part, and connects the center part by the cross bridge part. By preventing the magnetic pole tooth group from shifting from the position of the corresponding convex pole of the primary core due to the force of the flowing molding material during assembly work, and by removing the bridge at the center intersection after assembly is completed, magnetic short circuits can be prevented. This has the effect of reducing deterioration in the characteristics of the linear pulse motor due to magnetic flux leakage and magnetic flux leakage.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the present invention, Fig. 2 is a perspective view showing details of the magnetic pole tooth plate of the embodiment shown in Fig. 1, and Fig. 3 is a primary iron core of a conventional linear pulse motor. FIG. 3 is a perspective view showing a magnetic pole tooth plate of an example of the assembly. 1...Bias magnet, 2...Primary iron core, 2a...Convex pole, 3...Excitation winding, 4/14...Magnetic pole Tooth plate, 4a=4b・4c・4
d-14a・14b -14c, 14 d・-・-
Magnetic pole teeth, 4e/4f4g/4h/14e -14f -
14g・14h-=...outer bridge section, 4m...
・Cross bridge, 14i14, j, 14k, 14no...
...Cross bridge.

Claims (1)

[Claims] A bias magnet, a pair of primary iron cores having two parallel convex poles provided on the upper surface and sandwiching the bias magnet, and an excitation winding disposed on each of the convex poles of the primary iron core. , a magnetic pole tooth plate having four sets of magnetic pole teeth having a plurality of magnetic pole teeth at positions corresponding to the convex poles, and the magnetic pole tooth groups are superimposed on the corresponding convex poles and then fixed with resin. One of the linear pulse motors integrally formed with
In the second iron core assembly, the magnetic pole tooth plate has four outer bridging parts that connect the outer parts of adjacent magnetic pole tooth groups, and one bridge part that connects and intersects the magnetic pole tooth groups diagonally in the center part. 1. A primary core assembly for a linear pulse motor, characterized in that the cross-bridge portion is formed integrally and then separated by cutting.