JPS5941153A - Outer fan type rotary electric machine - Google Patents

Abstract

PURPOSE:To reduce the gap of an exhaust gas side hole of an outer fan cover without increasing the number of parts by integrally forming a plurality of inward projections on the exhaust gas side end of the cover. CONSTITUTION:A plurality of inward projections 32a are formed circumferentially on the exhaust gas side end of an outer fan cover 32 which encloses an outer fan 1. The projections 32a are formed by first forming a plurality of partial notches in a circumferential direction on the outer periphery of the exhaust gas side end of the cover 32, then inwardly extruding the end formed with the notches. The gap of the exhaust gas side hole 5 of the cover 32 can be reduced by suitably forming the shape and the size of the projections 32a, the interval to the adjacent projections 32a and the interval to the outer periphery of a frame 3 or a bracket 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an external fan-shaped rotating electrical machine in which the gap in the exhaust side opening of an outgoing cover can be made small enough to prevent fingers from entering the opening without increasing the number of parts.

A conventional example of an external fan-shaped rotating electric machine will be explained based on FIG. In this figure, an outer circumferential cover 2 surrounding an outer fan 1 is attached to the outer circumference of a bracket 4 fixed to an end surface of a frame 3 via a support part 4a, and one piece on the exhaust side of the outer fan cover 2 is attached to the support part 4a. A ring 6 that reduces the gap between the parts 5 and 5 is attached by bath welding, etc.
, in such a structure, the part of ring 6 is lost.
Not only tr q-, but also S without much effort required for bath contact work.
There was a drawback.

This invention overcomes the disadvantages mentioned in nd above by providing an outer fan-shaped rotating electric machine that can be made smaller without increasing the clearance of the exhaust side opening of the outer fan cover. The purpose is 4-C and 4-Z.

Embodiments of the present invention will be described below based on the drawings.

FIGS. 2 and 3 show the main parts of the fan-shaped rotating electric machine according to the present invention, and the parts shown in FIG. 1 and numbered iuJ-1 are the same parts. In the rotating electrical machine in (2.i. et al.'), a plurality of inward protrusions 32a are integrally formed in the circumferential direction at the exhaust side end of the outer L:l support cover surrounding the outer fan 1. The protruding portion 32+t is formed by providing a plurality of /J (circumferential partial cuts 32I) on the outer periphery of the exhaust side end of the outer fan cover 32 as shown in FIG. It is formed by extruding the provided end portion inward as shown in the figure 4. In order to provide an appropriate gap between the frame 3 and the outer circumference of the frame 3, the gap in the exhaust side opening 5 of the upper outer fan cover 32 is made so small that a finger cannot fit into it.
When a large number of radiating fins 33 in the axial direction are provided on the outer periphery of the fan cover 32, the protrusion 32a of the outer fan cover 32 is disposed at an intermediate position between adjacent radiating fins 33, as shown in FIG.

In FIG. 7 of the 1st issue showing another embodiment, the protruding portion 72a of the H9f fan cover 72 is formed by bending a @ portion inwardly provided with a circumferential partial cut 72b.

As described above, according to the present invention, the outer fan-shaped rotation 1ff
f: In Yu, the exhaust side opening of the external fan cover is configured so that a plurality of inward protrusions are extruded or cut and integrally formed in the circumferential direction at the exhaust side end of the external fan cover. The effect is that the gap between the parts can be made so small that a finger cannot fit into the protruding part without increasing the number of parts.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view showing the main parts of a conventional external fan-shaped rotating electrical machine.
Fig. 2 is a vertical sectional view showing the main parts of the outer fan-shaped rotating electrical machine according to the present invention, Fig. 3 is a side view of Fig. 2, and Fig. 4 is a perspective view showing the processing order of the outer fan cover of Fig. 2. , FIG. 5 is a perspective view showing the outer fan cover shown in FIG. 2, FIG. 6 is a side view showing the outer fan cover shown in FIG. 5 attached to a frame with radiation fins, and FIG. It is a perspective view showing an example of this. 1...Outer fan, 5...Opening, 32.72...Outer fan cover, 32 &, 72 B...Protrusion, 32
b, 721) -P) J Komi.

Claims (1)

[Claims] 1) Outer fan cup that surrounds the outer fan (a force that creates multiple partial cuts in the circumferential direction on the outer periphery of the - exhaust side end and extrudes the end with these cuts inward) or cutting An outer fan-shaped rotary electric machine characterized in that a protruding part is integrally formed with the outer body cover, and the gap in the exhaust side opening of the outer body cover is reduced to such an extent that a finger cannot fit therein.