JPS5899247A - Fixing device of motor iron core - Google Patents

Abstract

PURPOSE:To maintain the caulking strength preventing a caulking from being deformed by a method wherein the stress relief concaves relieving the stress in case of forming the embossed projections by annealing after core lamination are provided near the core embossed projections. CONSTITUTION:The semicircular concaves 5 as the stress relief are bored along the periphery near the embossed projections 3 of a motor core 1. The optimum gap between the stress relief concaves 5 and the embossed projections is 1mm.- 0.3mm. with 0.6mm. gap especially consistent with the stress relief and the caulking strength. Through these procedures, the caulking strength in case of laminating the motor core 1 may be sufficiently maintained and the stress in case of forming the embossed projections by annealing may be relieved into the semicircular bores 5 preventing the fixed iron core 2 from being deformed by expansion.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixing device for an electric iron core, which maintains caulking strength by a protrusion of a motor core.

The purpose is to prevent deformation of the caulked portion due to annealing treatment after motor core lamination.

To explain based on the conventional example shown in FIGS. 1 to 6,
(1) is a motor core which is laminated to form a stator core (2), and a plurality of protrusions 131+31, . The stator core 12+, which is formed by laminating and caulking the motor core (rivers 11) by fitting the protrusions 131131... into each other, is subjected to an annealing treatment. (4)
(41... is a bolt hole for the mounting bolt for attaching the stator core (2) drilled near the motor core (11) with a protrusion provided on the outer periphery where the magnetic flux density is low + 31131... The tightening part of the mounting bolt (not shown) is connected between the punching protrusion (31131...) and the punching protrusion +
31131... are separated to the extent that they do not touch each other. In this structure, the stamped protrusions 131+31... are fitted together, and the stator core 12) formed by laminating and caulking the motor cores ui+t+... is annealed. Treat it! And, the stator core has a protrusion +31131 of the motor core il+.
The ejection protrusion +311 in the opposite direction to the ejection direction of...
There was a problem in that the peripheral portion of No. 31-... bulged out.

The cause of this bulge is thought to be that the stress generated during molding of the punched protrusions +31+31... formed on the motor core +ll is released during the annealing process.

Also, as shown in Figure 114, attach the punching protrusion (31 to the motor core T).
When formed at the outer peripheral end of the motor core IIJ, the stator core (2
No. 1 does not cause bulging deformation even after annealing, but there was a problem that the punching protrusion (No. 3) deforms due to the stress relieving protrusion during molding and weakens the caulking strength.

The basic structure of the present invention is to provide a motor core with at least one protrusion, fit the 1M protrusion into a roof tile, stack a plurality of motor cores, and place the protrusion in the vicinity of the protrusion on the motor core. The present invention is characterized in that a stress relief portion is provided to relieve the stress generated during the punching protrusion forming process during the annealing process after the motor core is laminated.

With this configuration, the caulking strength of the punched protrusions during motor core lamination is maintained, and the stress generated when forming the punched protrusions through annealing is relieved by a stress relief section provided near the punched protrusions, thereby preventing deformation of the motor core. It is intended to prevent

The present invention will be explained below based on FIG. 15 to FIG. 6.

Incidentally, the same parts as those in the conventional example shown in FIGS. 181 to 5 are designated by the same reference numerals, and the description thereof will be omitted.

The difference from the conventional example is the protrusion (31) of the motor core il+.
(3) A semicircular hole +51+5 on the outer peripheral edge near...
1... is bored to serve as a stress relief section.

Due to this difference, the protrusion of the motor core +11 is 13++
31... is a motor core (
11 A semicircular hole 1 bored in the outer peripheral end of the motor core 111 to sufficiently maintain the caulking strength of the laminated layers and to reduce the stress of forming the punched protrusions 131131 by annealing.
5115+... to prevent bulging deformation of the stator core (2). The stress relief portion bored in the vicinity of the embossing protrusion +31131... has a distance of 2-2 from the embossing protrusion.
If there is more than that, the stress cannot be released, and the stator core +21 will bulge and deform during annealing, and the punched protrusions 13+131...
(If there is no space in contact with the embossed protrusion, the embossed protrusion +31+31... will be deformed during molding of the embossed protrusion, and the caulking strength will be weakened.) . Stress relief and caulking strength can be achieved at the same time when a 6-stroke interval is provided.

As shown in Fig. 187, it goes without saying that a circular hole (6) can be bored in the vicinity of the protrusion (31) of the Yuki-Takoa tl+ to have a similar effect as a stress relief part. (The present invention provides a motor core in which a motor core is provided with at least one protrusion, and the protrusions are fitted together to stack a plurality of motor cores.) Since a stress relief part was provided to release the stress generated during the molding of the punched protrusions caused by the annealing treatment after lamination S of the motor core, the punched protrusions formed on the motor core may be deformed (due to caulking during lamination). It has practical effects such as maintaining strength and preventing deformation around the caulked portion after lamination of the motor core by releasing the stress generated during the punching protrusion forming process through the stress relief portion during annealing.

[Brief explanation of the drawing]

Figures 1 to 4 show conventional examples, Figure 111 is a plan view of the stator core, Figure 2 is a front view of the stator core seen from the direction of the arrow in Figure 1, and Figure 845 is Figure 2. Figure 4 is an enlarged view of part 8 of , and Figure 4 is a flat if1 diagram of the main part of the stator core showing another conventional example.
5 to 8 show the present invention, FIG. 5 is a plan view of the stator core, FIG. 1 part 6 is an enlarged view of part 0 of FIG. 5, and FIG. Enlarged sectional view of the main part showing the shape, 8
The figure is a plan view of a main part of a stator core showing another embodiment. (1) (11... Motor core, (2)... Stator core, +31+31... Embossed protrusion, (5 bar 61...
- Hole.

Claims (1)

[Claims] An electric motor core is characterized in that a stress relief part is provided in the vicinity of the protrusion of the motor core to release the stress caused by the protrusion forming due to the annealing treatment after the lamination of the motor core. fixation device.