JP2552447Y2 - Linear motor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motor having improved means for fixing a primary core to a substrate.

[0002]

2. Description of the Related Art A linear motor is a type in which a squirrel-cage motor is developed to have an infinite radius, and a rotor linearly moves with respect to a stator. FIG. 3 shows the structure of the linear motor. In the figure, 1 is a primary side core, 2 is a winding, 3 is a runner, and the winding 2 is connected to an AC power supply via a power supply device (not shown). The primary core 1 is formed by laminating comb-shaped thin iron plates, and is firmly fixed to receive a thrust and a magnetic attraction.

FIGS. 4 and 5 show conventional primary core fixing structures as Conventional Examples 1 and 2. FIG. The prior art 1 is one in which the lower surface of the primary core 1 is directly welded to the substrate 4 divided into a plurality of parts as shown in the figure, and the prior art 2 has the hole 4a formed in the substrate 4 and the primary side in the hole 4a. The core 1 and the substrate 4 are welded.

[0004]

However, since welding between the substrate and the primary side core is performed at a certain interval, not only the strength is insufficient, but also the upward direction in FIGS. The primary core bends in a convex state.

Therefore, an object of the present invention is to provide a linear motor that solves the above problem.

[0006]

In order to achieve the above object, the structure of the present invention is to form a primary core by laminating a comb-shaped core plate having a plurality of slits formed at equal intervals. In a linear motor configured by fixing the surface on the side opposite to the slit to the substrate, the primary core is divided into a plurality of core pieces, and projections are formed on both sides in the direction in which the slits are arranged and on the side opposite to the slit, A bolt penetrating the substrate is sandwiched between adjacent protrusions of core pieces arranged along the direction in which the slits are arranged, and the bolt is screwed into a nut material that is fitted between adjacent core pieces and has a tap hole. And a projection interposed between the nut material and the substrate.

[0007]

Since the core piece is fixed by sandwiching the protrusions formed on both sides of the core piece between the nut member and the board, it is possible to reliably fix the primary core, which is a set of core pieces, to the board. it can.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. In this embodiment, since a part of the conventional linear motor is improved, the same parts as those of the conventional linear motor are denoted by the same reference numerals, and the description thereof will be omitted.

FIG. 1 shows the configuration of the linear motor according to the present invention.
This will be described with reference to FIG. As shown in the figure, the primary core is constituted by a plurality of divided core pieces 5. Core piece 5
Has five teeth by forming a slit 7, and has a symmetrical shape by forming projections 8 on opposite sides of the slit at both ends. The core pieces 5 are arranged on the substrate 4 along the direction in which the slits 7 are arranged.
Fixed to That is, as shown in FIG. 2, a nut member 10 having a tapped hole 11 formed between teeth 6 of adjacent core pieces 5 is arranged, and a bolt 9 inserted through a through hole 12 of the substrate 4 is used to connect the protrusions 8 to each other. Nut material 10 sandwiched between
Screwed. That is, the core piece 5 is fixed to the substrate 4 by sandwiching the projections 8 at both ends of the core piece 5 between the nut material 10 and the substrate 4. Here, a plurality of bolts 9 are provided in a direction perpendicular to the paper surface, and the core piece 5 located at the end is fixed by using the auxiliary piece 13 as a substitute for the projection 8 as shown on the left end of FIG.

Next, the operation of the linear motor will be described.

Since both ends of each core piece 5 are mechanically fixed to the substrate 4, the substrate 4 and the primary core, which is a set of the core pieces 5, do not bend as in the case of the conventional welding connection. Each core piece 5 is securely fixed to the substrate 4.

[0012]

As can be understood from the above description, according to the linear motor according to the present invention, the core piece is mechanically connected to the substrate by sandwiching the projection between the nut material and the substrate, so that the linear motor is welded. No distortion as in the case occurs. Therefore,
The conventional core does not bend as in the prior art.
In addition, the primary core is securely fixed to the substrate.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a primary core of a linear motor according to the present invention.

FIG. 2 is an enlarged view of a main part of a primary core of the linear motor according to the present invention.

FIG. 3 is a perspective view of a linear motor.

FIG. 4 is a configuration diagram of a primary core of Conventional Example 1 in a conventional linear motor.

FIG. 5 is a configuration diagram of a primary core of Conventional Example 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 4 ... Board 5 ... Core piece 6 ... Teeth 7 ... Slit 8 ... Projection 9 ... Bolt 10 ... Nut material 11 ... Tap hole 12 ... Through-hole.

Claims (1)

(57) [Scope of request for utility model registration] In a linear motor, a comb-shaped core plate having a plurality of slits formed at equal intervals is laminated to form a primary core, and a surface of the primary core opposite to the slit is fixed to a substrate. The primary side core is divided into a plurality of core pieces, and at both ends in the direction in which the slits are arranged, projections are formed on the opposite side of the slit, and between adjacent projections in the core pieces arranged along the direction in which the slits are arranged. A bolt that penetrates the board is sandwiched between the core pieces adjacent to each other, and the projection is sandwiched between the nut material and the board by screwing the bolt to a nut material having a tapped hole while being fitted between adjacent core pieces. Linear motor.