JPS6088417A - Fastening device of iron core - Google Patents

Abstract

PURPOSE:To fasten a yoke part by the predetermined fastening pressure without using a fastening stud by fixing a fitting part of a clamp to a inclined end plane of a screw pedestal by a screw member and fastening the yoke part by the fastening force of said screw member at the same time. CONSTITUTION:Each clamp 11 is provided with a fitting part 11a which is inclined outward regarding a yoke fastening plane A by the predetermined angle on one side of the width direction of the yoke. A screw pedestal 15 whose end plane 15a is inclined corresponding to the fitting part 11a is attached to the yoke side of a cross bar 13 which is connected with the clamp 11 by welding with utilizing a space between the cross bar 13 and the step part 3a of the yoke. The fitting part 11a of the clamp 11 is fixed to the end plane 15a of the screw pedestal 15 provided with a screw runner 16 by a bolt 17. At that time, the yoke part 3 is fastened by a component of force P1 of the fastening force P acting on the clamp 11. Consequently, the joint iron part 3 can be fastening by the predetermined fastening pressure by selecting the values of the inclination angle of the clamp fitting part and the strength of the bolt 17 properly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a device for tightening a yoke of an iron core such as a transformer or a reactor.

[Technical background of the invention and its problems]

The iron cores of transformers and reactors are shown in Figure 1 (a) and (
As indicated by reference numeral 1 in b), it consists of leg parts 2 each laminated with silicon value plates, and upper and lower yoke parts 3. Although not shown, the leg section 2 has a substantially cylindrical shape with a step around its periphery so that its cross section is inscribed in a circle, and a winding 4 is disposed on the outside thereof. In addition, the upper and lower yoke parts 3 have a substantially circular cross section 9 with a stepped part 3a around the periphery, similar to the leg part 2, and clamps 11 and 11 are respectively provided at both ends in the stacking direction. is attached to a tightening stud 12 that passes through the yoke portion 3 to support the required tightening pressure on the I@ portion.

Both clamps 11 are clamp insulators with crossbars 13 at the corresponding yoke ends.

However, in the above structure, a punched hole is formed in the steel plate of the yoke portion for inserting the tightening stud, so the effective cross section is reduced and the magnetic properties are inevitably deteriorated. Another disadvantage is that the number of man-hours required for punching holes increases.

[Purpose of the invention]

The present invention provides an iron core tightening device a that can tighten a laminated part with a required applied pressure without reducing the magnetization characteristics of the yoke part.
The purpose is to provide a well-organized standard.

[Overview of the invention]

The present invention forms a mounting part that is inclined outwardly with respect to the yoke clamping surface on the end side of the core in the longitudinal iron width direction of a clamp that shreds the yoke part of the iron core in the stacking direction, and also forms a mounting part on the crossbar corresponding to this clamp. Using the space between the crossbar and the yoke step, a screw seat with an inclined end face corresponding to the above-mentioned mounting part is provided protrudingly, and the mounting part of the clamp is attached to the inclined end face of this screw seat with a screw member. The yoke is fixed, and the yoke part is simultaneously tightened by the force applied at that time, and the yoke part is tightened with the required force without using a delivery stud. .

[Embodiments of the invention]

Fig. 2(a) and (b) Fig. 3 shows an embodiment of the iron core tightening device of the present invention, and the parts indicated by reference numerals 1.2.3.4.11.13 are shown in Fig. 1(a) and (b). The clamps 11 each have a mounting portion 11a on one side in the yoke width direction that is inclined outward at a predetermined angle θ with respect to the yoke clamping surface A.
is the provision. Further, on the yoke side of the crossbar 13 connected to this clamp 11, by utilizing the space between this and the yoke stepped portion 3a, a screw seat 15 with an inclined end face 15a corresponding to the mounting portion 11g is protruded by welding, Screw hole 16 of this screw seat 15
The mounting part 11a of the clamp 11 is fixed to the end face 15a provided with a bolt 17, and the yoke part 3 is moved in the stacking direction using a component force Ps (see Fig. 3) of the clamping force P acting on the clamp 11. By selecting appropriate values for the strength of the bolt 17 and the angle of inclination θ of the clamp attachment portion, the yoke portion 3 can be tightened with the required tightening pressure.

With the above configuration, the steel plate of the core yoke part 3 can be
(Since the yoke part 3 can be tightened in the stacking direction without creating punched holes for studs with !, it is possible to prevent deterioration of the magnetization characteristics of the core. Also, since there is no need to punch holes in the yoke part, the structure It has the advantage of being simplified and reducing the number of man-hours.

In the embodiment shown in FIG. 4, the inclination angle θ of the protruding portion 11m with respect to the yoke tightening surface of the clamp 11 is the screw seat mounting end surface 15a.
The inclination angle θ1 of θ1 is appropriately increased. In this way, when the swivel clamp 11 is attached to the screw seat 15, the clamping pressure of the yoke part 3 is further increased due to the elastic deformation of the clamp due to the angle difference between the two.9 To improve the tightening performance by -18. Can be done.

〔Effect of the invention〕

According to the present invention, the yoke portion of the iron core is tightened by the tightening force of the screw member that connects the clamp provided thereon to the corresponding crossbar. There is no need to use a tightening stud, which improves the magnetization properties of the core, and also simplifies the structure and facilitates manufacturing.

[Brief explanation of the drawing]

Figure 1 (,1 and value) JrJ, conventional core tightening 4:j
j (front view and side view of the wooden structure; Figures 2 (a+ and b) are front views and side views showing one embodiment of the iron core tightening device according to the present invention; Figure 3 is the front view and side view of the structure; FIG. 4 is an enlarged view of the main part showing another embodiment of the present invention.
... Iron core, (3) ... Yoke part, 11 ... Clamp. 1-1m...Mounting part, 13...Crossbar, 15...
・Screw seat. 17...Screw member. Agent Patent Attorney Inoue - Male 1st (a) (b) Kazu? Figure 4

Claims (1)

[Claims] A clamp provided at both ends in the stacking direction of the core yoke portion having a stepped portion around the cross section is provided with a mounting portion inclined outwardly with respect to the clamping surface of the clamp on the core end side in the yoke width direction. The yoke 11111 of the crossbar, which is provided with a trap on the outside of the iron part, is provided with a screw seat that protrudes by utilizing the space between the yoke and the stepped part of the yoke, and whose end face is inclined to correspond to the clamp mounting part. , an iron core tightening device 6° characterized in that the yoke portion is tightened in the stacking direction by the tightening force of a screw member that fixes the probing portion of the clamp to the screw seat;