JP2002345184A - Non-rotating structure of stator core in underwater motor - Google Patents

Abstract

(57) [Summary] [Object] To provide a structure for preventing a stator core from rotating in a submersible motor, which does not require drilling a through hole from the outer peripheral surface of a motor frame and is excellent in workability and waterproofness. The stator core 3 is arranged so that the groove 4 extending in the axial direction on the outer peripheral surface of the stator core 3 and the groove 2 extending from the inner peripheral surface edge on the non-load side of the motor frame 1 face each other. The key cover 5 is press-fitted into the motor frame 1, and the key 5 is inserted into a key groove formed between the opposing surfaces of the fossacle grooves 2 and 4. The joining edge was opposed to the rear end face of the key 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing a stator core from rotating in an underwater motor.

[0002]

2. Description of the Related Art As means for preventing a stator core from rotating due to a reaction force at the time of driving a motor, conventionally, as shown in FIG. 6, for example, as shown in FIG. , Stator core 13
The pin 15 is driven into the bottomed hole S1 reaching inside, and the rear portion is welded or filled with a sealing agent for waterproofing. As shown in FIG. 7, a bolt 25 is inserted through a rubber ring from a through hole H drilled from the outer peripheral surface of the motor frame 11 to a bottomed screw hole S2 reaching the inside of the stator core 13.
May be screwed.

However, in such a structure, not only the processing and assembling work is troublesome and inefficient, but also a submersible motor, which is a prime mover of a rotary device used underwater, suffers from inundation from the through hole H. Anxiety remains.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure for preventing a stator core from rotating in a submersible motor which does not require drilling a through hole from the outer peripheral surface of a motor frame and is excellent in workability and waterproofness. .

[0005]

In the underwater motor according to the present invention, in the stator core detent structure, the stator core is extended from the groove extending in the axial direction on the outer peripheral surface of the stator core and the inner peripheral edge of the motor frame on the non-load side. The stator core is press-fitted into the motor frame so that the grooves face each other, a key is inserted into a key groove formed between the opposing surfaces of the both grooves, and a lid is mounted on the non-load side edge of the motor frame. The joining edge of the head cover facing the rear end face of the key.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIGS.

1 is a motor frame, 2 is a groove extending from the inner peripheral edge of the motor frame 1 on the non-load side, and 3 is a stator core fitted to the inner peripheral surface of the motor frame 1 and its outer periphery. A groove 4 extending in the axial direction is provided vertically on the surface, and a key groove is formed by opposing the groove 4 and the groove 2 inside the motor frame 1. Reference numeral 5 denotes a key that is inserted into the key groove. And the above-mentioned fossa groove 2, 4
Are pressed into the motor frame 1 so that the keys 5 face each other, and the key 5 is fitted into a key groove formed between the opposing surfaces of the two flutes 2, 4.
The motor frame 1 is coupled to the non-load side edge of the motor frame 1 by bolting or the like in a state of facing the rear end surface.

[0008]

The advantages of the structure of the present invention are as follows.

Since it is not necessary to form a through hole from the outer peripheral surface of the motor frame as in the prior art, workability and waterproofness are excellent.

[0010] Since the key can be inserted after the stator core is press-fitted, the use of a taper key or the like prevents the stator core from rotating and simultaneously prevents the stator core from coming off.

[0011] When assembling the underwater motor, to the rear end face of the key,
The joining edges of the head cover are opposed to each other to produce a key drop-prevention effect.

The workability is good because the groove on the motor frame side constituting the keyway is only short and small.

With the head cover removed, the fitted state of the key can be easily visually recognized, the key and the stator core can be easily attached and detached, and the maintenance is excellent.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a main part of a submersible motor having a rotation preventing structure according to the present invention.

FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIG. 3 is a transverse sectional view taken along line BB of FIG. 1;

FIG. 4 is a longitudinal sectional side view of a main part of a motor frame portion in FIG. 1;

FIG. 5 is a vertical sectional side view of a main part of a stator core portion in FIG. 1;

FIG. 6 is a longitudinal sectional side view of a main part of a conventional underwater motor provided with a rotation preventing structure, showing an example in which a pin is driven into a stator core from a through hole drilled from an outer peripheral surface of a motor frame.

FIG. 7 is a vertical sectional side view of an essential part of a conventional underwater motor provided with a rotation preventing structure, showing an example in which a bolt is screwed into a stator core through a through hole formed from an outer peripheral surface of a motor frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor frame 2 Groove 3 Stator core 4 Groove 5 Key 6 Head cover

Claims (1)

[Claims] The stator core is positioned inside the motor frame such that the groove extending in the axial direction on the outer peripheral surface of the stator core and the groove extending from the inner peripheral surface edge on the non-load side of the motor frame face each other. Into the key groove formed between the opposing surfaces of the fossae groove, and the joining edge of the head cover, which is covered on the non-load side edge of the motor frame, faces the rear end surface of the key. A non-rotating structure for a stator core in a submersible motor, characterized in that: