JPS598442Y2 - rotating electric machine - Google Patents

Description

[Detailed explanation of the idea] This invention relates to the outer covering structure of a rotating electric machine.

2. Description of the Related Art Conventionally known steel plate outer frame rotating electric machines include those shown in FIGS. 1 and 2.

In the figure, 1 is a stator core, 1a is a stator coil, and 2 is a stator core.
3 is an outer frame provided around the outer periphery of the stator core 1 by bending or shaping a thin steel plate into a corrugated shape. It is composed of hollow cooling fins 31 and a contact surface 32 which is shaped like a wave-shaped trough and contacts the outer periphery of the stator and a flange to be described later.

4 is a flange provided at both ends of the steel plate outer frame 3; 5 is a bracket attached to the flange 4; 6 is an internal fan;
7 is an external fan, 8 is a rotating shaft that rotates together with the rotor core 2, 9 is a seat plate to which the terminal box 10 is attached, and 11 is a hanging portion.

Note that 12 is an internal air passage ventilated by the internal fan 6;
13 is an outside air passage ventilated by an external fan 7.

Next, these structures will be explained.

A seat plate 9 attached to the outer periphery of the upper surface of the corrugated steel plate outer frame 3 is welded or the like, and a terminal box 10 is attached above it.

A lead wire drawn out from the stator coil 1a (not shown) is drawn into the terminal box 10 through a hole made in the seat plate 9.

Conventionally, as described above, a seat plate for attaching a terminal box to the upper surface of the corrugated steel plate outer frame was attached to the outer periphery of the stator core, and therefore, cooling fins were not formed on this outer periphery.
Therefore, there was a drawback that the cooling effect was reduced.

This idea was made with the aim of eliminating the above-mentioned drawbacks. A corrugated steel plate outer frame is attached to the entire upper circumference of the stator core, and a predetermined part of the cooling fin is cut out to form an opening. The purpose of the present invention is to provide an outer covering structure designed to improve the cooling effect by attaching the terminal box to the hanging part so as to cover this part.

An embodiment of this invention will be described below with reference to the drawings.

In FIGS. 3 and 4, reference numeral 11a denotes the upper surface of the end of the hanging portion 11 which is elongated in the axial direction, and its height is approximately equal to the top of the cooling fin 31. 14
is an opening formed by cutting out the vicinity of the top of the cooling fin 31.

The terminal box 1o is attached to the upper surface 11a of the hanging portion 11 so as to cover the opening 14.

Although not shown, the lead wire drawn out from the stator coil 1a is drawn into the terminal box 10 through the opening 14 of the cooling fin 31.

As described above, in this invention, the upper surface of the stator core equipped with the terminal box is entirely covered by the corrugated steel plate outer frame 3, and only the terminal box mounting part has the fin section cut out, and the opening 14 is used as the lead wire entry port. and the terminal box 10 is
Since the cooling fins 31 are mounted on the cooling fins 31a, the number of cooling fins 31 increases.

In the above embodiment, the terminal box 10 is mounted almost horizontally, but the upper surface 11a of the hanging portion 11 is provided inclined in the axial direction or the circumferential direction, and the terminal box 10 is mounted in an inclined manner. This makes the wiring work easier.

As described above, according to this invention, a corrugated steel plate outer frame is provided around the entire circumference, a part of the cooling fin part is cut out to form an opening, and the terminal box is attached to the upper surface of the hanging part so as to cover this part. Attach it to the
Since the lead wires are drawn in through the opening, the number of cooling fins is increased, which has the advantage that cooling can be performed effectively.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of a conventional rotating electric machine, and Figure 2 is a vertical cross-sectional view of a conventional rotating electric machine.
FIG. 3 is a side view of the main parts as seen from the direction of arrow A in the figure, FIG. 3 is a side view corresponding to FIG. 2 of one embodiment of this invention, and FIG. 4 is a front view of FIG. 3. In the figure, 1... stator core, 1a... stator coil,
3... Corrugated steel plate outer frame, 31... Cooling fin, 32...
... Contact surface part, 10 ... Terminal box, 11 ... Hanging part, 1
1a...Top surface part, 14...Opening part. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A corrugated steel plate outer frame is fixed to the outer periphery of the stator core by bending the steel plate into a corrugated shape to form cooling fins that serve as axial ventilation passages, and a terminal box is attached to the outside of this corrugated steel plate outer frame. , fixed to the cooling fin valley at the top of the corrugated steel plate outer frame, a long plate-shaped hanger extending in the same direction as the cooling fin and having approximately the same height as the cooling fin; A rotating electric machine characterized in that a terminal box is fixed to the upper surface of the hanging hand, and a lead wire is drawn into the terminal box from inside through an opening provided near the top of the cooling fin.