JPH0511786U - Linear motor - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a linear motor capable of reducing the number of welding steps, preventing the strength of the mounting plate from decreasing, and mitigating the deformation due to welding when fixing the laminated core of the linear motor and the mounting plate by welding. To do. [Structure] A protrusion 4 is provided on a laminated iron core 3, the protrusion 4 is inserted into the elongated hole 2 of the mounting plate 1, and the protrusion 4 is discharged, and both ends of the protrusion 4 and the laminated iron core 3 and the mounting plate 1 around the protrusion 4 are discharged. 5 is welded and fixed at the same time.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a linear motor configured to weld a laminated iron core to a mounting plate.

[0002]

[Prior Art]

 In recent years, in linear motors, there is an increasing demand to reduce the number of welding points when welding and fixing a laminated iron core to a mounting plate.

In a general linear motor, as shown in FIG. 5, a laminated core 22 wound with a coil 21 is provided on a base 24 via a mounting plate 23, and a magnet 25 corresponding to the laminated core 22 is held. The slider table 27 is provided via the tool 26, and the slider table 27 is held by the linear guide 28 so as to correspond to the laminated core 22.

A welding structure of a laminated iron core 22 and a mounting plate 23 of a conventional linear motor of this type will be described with reference to FIGS. 6 to 8.

As shown in the figure, a long hole 29 is provided in the mounting plate 23, and the inner end surfaces 30 of the long hole 29 and the laminated core 22 are welded and fixed to each other by the weld portion 31.

[0006]

[Problems to be solved by the device]

In such a conventional welding structure, there are many welded portions 31 and welding is performed on both left and right end surfaces 30 of the elongated hole 29. Therefore, the direction of the welding torch can be changed within one elongated hole 29. In addition, there is a problem in that the number of welding points increases and the width l ₁ of the long hole 29 increases and the strength of the mounting plate 23 decreases.

The present invention solves the above-mentioned problems, and an object of the present invention is to provide a linear motor in which welding man-hours are reduced, the strength of the mounting plate is improved, and the deformation due to welding is reduced in welding and fixing the laminated core and the mounting plate. And

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the linear motor of the present invention is provided with a long hole provided in a mounting plate and a laminated iron core having a protrusion to be inserted into this long hole. Both ends are welded.

[0009]

[Action]

 In the linear motor of the present invention having the above-mentioned structure, the protrusions of the laminated iron core are discharged, and the periphery of the protrusion and both end surfaces of the long hole of the mounting plate are welded at the same time. It is possible to prevent the deterioration of the strength and the strength of the mounting plate.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

As shown in the figure, the mounting plate 1 is provided with a plurality of elongated holes 2 having a narrow width 1, and the laminated core 3 is provided with projections 4 to be inserted into the elongated holes 2.

In the above structure, when the laminated iron core 3 is fixed to the mounting plate 1 by welding, the protrusion 4 is inserted into the elongated hole 2 of the mounting plate 1, and the protrusion 4 is discharged to generate the laminated iron core 3 and Both ends 5 of the long hole 2 of the mounting plate 1 are simultaneously welded by the welded portion 6.

As described above, according to the linear motor of the embodiment of the present invention, the protrusion 4 to be inserted into the elongated hole 2 formed in the mounting plate 1 is integrally formed in the laminated iron core and inserted into the elongated hole 2. Since the electric discharge is generated in the protrusion 4 and the peripheral portion of the protrusion and both end surfaces 5 of the elongated hole 2 are simultaneously welded, it is sufficient to perform the welding work at one place in one elongated hole 2, and the width 1 of the elongated hole 2 becomes the same as in the conventional example. Since it can be formed with a comparatively narrow width 1, it is possible to prevent the strength of the mounting plate 1 from decreasing.

It should be noted that even if the projection inserted into the long hole 2 of the mounting plate 1 is composed of a portion 2a fitted into the long hole 2 and a projection portion 2b as shown in FIG. Is.

[0015]

[Effect of the device]

 As is apparent from the above embodiments, according to the present invention, the laminated core of the welded portion is provided with a protrusion, and the protrusion is discharged to enable simultaneous welding of the laminated core and both end faces of the elongated hole of the mounting plate. Therefore, it is possible to provide a linear motor capable of reducing the number of welding points, simplifying the welding work by the welding torch, preventing the strength of the mounting plate from decreasing, and relaxing the deformation of the laminated core and the mounting plate.

[Brief description of drawings]

FIG. 1 (a) is a side view with a partial cross section showing a state in which a laminated core of a linear motor according to an embodiment of the present invention is fixed to a mounting plate by welding. (B) A state in which the laminated core is fixed to a mounting plate by welding. Bottom view showing

FIG. 2 is a cross-sectional view showing a state before welding the laminated core and the mounting plate.

FIG. 3 is a cross-sectional view showing a welded state of the laminated core and the mounting plate.

FIG. 4 is a cross-sectional view showing a state of a protruding portion according to another embodiment of the present invention.

FIG. 5 (a) is a side view with a partial cross section of a conventional linear motor, and (b) is a front view of the same linear motor.

FIG. 6 (a) is a partial cross-sectional side view showing a state where the laminated iron core is fixed to a mounting plate by welding. (B) A bottom view showing a state where the laminated laminated core is fixed to the mounting plate by welding.

FIG. 7 is a cross-sectional view showing a state before welding the laminated core and the mounting plate.

FIG. 8 is a cross-sectional view showing a welded state of the laminated core and the mounting plate.

[Explanation of symbols]

 1 Mounting plate 2 Long hole 3 Laminated iron core 4 Protrusion 5 Both end surfaces 6 Welded part

Claims (1)

[Claims for utility model registration] [Claim 1] A long hole provided in a mounting plate, and a laminated iron core having a projection for discharge welding inserted into the long hole,
A linear motor in which both edges of the protrusion and the long holes of the mounting plate are welded.