JP2002027687A - Structure of stopping whirl of stator core in submerged motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide structure of stopping whirl of a stator core in a submerged motor which is superior in work efficiency and waterproofness, making use of the cut face at the periphery of the stator core as it is, without the need for boring a through hole from the peripheral face of a motor frame. SOLUTION: In a submerged motor, using a stator core 2 where a cut face 4 is made at the periphery, a whirl stopping lock piece 5 abuts on a cut face 4 of a stator core 2 seeking to the rotate with reaction at drive of the motor, by projecting the lock piece 5 for stopping whirl with its end face opposed to the cut face 4 at the inside periphery of a motor frame 1, and press-fitting the stator core 2 into a motor frame 1, so that the cut face 4 opposes it along the line of projection of the lock piece 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator core detent structure for an underwater motor using a stator core having a cut surface formed at a key point on an outer peripheral surface.

[0002]

2. Description of the Related Art In order to facilitate press-fitting into a motor frame, a cut surface that does not come into contact with the motor frame inner circumferential surface is provided at an important position on the outer peripheral surface of the stator core so that resistance during press-fitting is reduced. Is formed. In order to prevent the stator core from rotating due to the reaction force at the time of driving the motor, for example, as shown in FIG. 6, a through hole H drilled from the outer peripheral surface of the motor frame 11 reaches the non-cut surface 13 of the stator core 12. Pin 15 to bottom hole S1
, And the rear part is welded or filled with a sealing agent for waterproofing. Further, as shown in FIG. 7, a bolt 25 is screwed via a rubber ring from a through hole H drilled from the outer peripheral surface of the motor frame 21 into a bottomed screw hole S2 reaching the non-cut surface 23 of the stator core 22. Sometimes.

However, such a structure is troublesome and inefficient, and in a submersible motor used as a prime mover of a rotary device used in water, there is a concern that the water will penetrate through the through hole H.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a submersible motor which is excellent in workability and waterproofness by utilizing a cut surface of an outer periphery of a stator core without needing to form a through hole from an outer peripheral surface of a motor frame. An object of the present invention is to provide a rotation preventing structure for a stator core.

[0005]

In the underwater motor according to the present invention, in the underwater motor detent rotation preventing structure, in a submersible motor using a stator core having a cut surface formed on an outer peripheral surface, a non-rotating locking piece having an end surface facing the cut surface is provided. The stator core is press-fitted into the motor frame so that the cut surface faces the protruding line of the locking piece and is fixed to the inner peripheral surface of the motor frame so that the cut surface faces the protruding line, thereby trying to rotate by the reaction force at the time of driving the motor. The rotation preventing locking piece is configured to contact the cut surface of the stator core to be rotated.

[0006]

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

[0007] 1 is a motor frame, 2 is a stator core fitted and fixed in the motor frame 1, the outer peripheral surface of which is an arcuate surface 3.
3 and a cut surface 4... 4 formed flat so as not to contact the inner peripheral surface of the motor frame 1. 5... 5 have the above-mentioned cut surface 4.
4 is a locking member for preventing rotation provided on the inner peripheral surface of the motor frame 1 so as to face the base member 4. The base is fitted into a recess in the inner peripheral surface of the motor frame 1 as shown in FIGS. 1 and 2. In this case, the base may be fixed to the inner peripheral surface of the motor frame 1 by welding or other methods as shown in FIG. 3, or may be molded integrally with the motor frame 1 as shown in FIG. . In addition, the detent locking piece 5 does not necessarily need to be disposed so as to face all the cut surfaces 4... 4, and even a single locking piece functions as a detent.
The length in the axial direction can also be arbitrarily set so as to prevent the rotation of the stator core 2.

When the stator core 2 is pressed into the motor frame 1 so that the cut surface 4 faces the projecting line of the locking piece 5 for rotation prevention, the arcuate surfaces 3... The stator core 2 is fixed to the peripheral surface in a fixed state. At this time, the tip surface of the locking member 5 for rotation prevention may be in contact with the cut surface 4 or may be in a non-contact state with a slight gap. In the former case, the rotation preventing locking piece 5 abuts on the cut surface 4 of the stator core 2 which is going to rotate by the reaction force at the time of driving the motor, and the rotation is stopped. In the latter case, the cut surface 4 contacts the inner peripheral surface of the motor frame 1. When the stator core 2 rotates due to slippage on the fitting surface with the arc surface 3, the edge of the locking member 5 for locking is locked to the cut surface 4 as shown in FIG. Will be.

[0009]

According to the structure for preventing the stator core from rotating in the underwater motor according to the present invention, the cut surface formed from the beginning on the outer peripheral surface of the stator core is used as it is, and the engagement of the engagement piece enables the motor to be driven when the motor is driven. Since the rotation of the stator core due to the reaction force can be suppressed, and since it is not necessary to form a through hole from the outer periphery of the motor frame, there is an advantage that workability and waterproofness are excellent.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a submersible motor having a detent structure according to the present invention, showing an example in which a base of a detent locking piece is fitted into a recess on an inner peripheral surface of a motor frame.

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

FIG. 3 is a cross-sectional view of a submersible motor provided with the anti-rotation structure of the present invention, showing an example in which the base of the anti-rotation locking piece is bonded to the inner peripheral surface of the motor frame by welding or other methods.

FIG. 4 is a cross-sectional view of a submersible motor provided with the anti-rotation structure of the present invention, showing an example in which a base of a locking piece for anti-rotation is molded integrally with a motor frame.

FIG. 5 is an explanatory diagram showing a state in which the stator core is prevented from rotating according to the structure of the present invention.

FIG. 6 is a cross-sectional 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 formed from an outer peripheral surface of a motor frame.

FIG. 7 is a cross-sectional view of a main 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 Stator core 4 Cut surface 5 Locking piece for rotation prevention

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshio Ogura 4-16-40, Tsurumi-ku, Tsurumi-ku, Osaka-shi, Osaka Inside Tsurumi Seisakusho Co., Ltd. (72) Takeshi Izumiya 4--16, Tsurumi-ku, Tsurumi-ku, Osaka-shi, Osaka No. 40 F-term in Tsurumi Seisakusho Co., Ltd. (reference) 5H002 AA07 AB06 AC02 AC04 AC06 5H605 AA02 AA08 BB05 BB17 CC01 DD03 GG02 GG04 5H615 AA01 BB01 BB14 BB16 PP01 PP07 SS16 SS18 SS19

Claims (1)

[Claims] 1. An underwater motor using a stator core having a cut surface formed on an outer peripheral surface thereof, wherein a detent locking piece having an end surface facing the cut surface is provided on an inner peripheral surface of the motor frame, and the lock is provided. By press-fitting the stator core into the motor frame so that the cut surfaces face each other along the protruding line of the piece, the detent locking piece comes into contact with the cut surface of the stator core that is going to rotate by the reaction force at the time of driving the motor. A non-rotating structure for a stator core in a submersible motor, characterized in that it is configured.