JP4864229B2 - Stator core detent structure for submersible motors - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure for preventing rotation of a stator core in a submersible motor.
[0002]
[Prior art and its problems]
As a means for preventing the stator core from rotating due to a reaction force when the motor is driven, conventionally, as shown in FIG. 7, for example, a bottomed bottom reaching the stator core 12 through a through hole H drilled from the outer peripheral surface of the motor frame 11 The pin 15 is driven into the hole S1, and the rear portion is welded or filled with a sealing agent for waterproofing. Further, as shown in FIG. 8, a bolt 25 may be screwed through a rubber ring into a bottomed screw hole S <b> 2 reaching into the stator core 12 from a through hole H drilled from the outer peripheral surface of the motor frame 11.
[0003]
However, such a structure is not only inefficient and inefficient in processing and assembling work, but also in an underwater motor used as a prime mover of a rotating device used underwater, there is anxiety about inundation from the through hole H. .
[0004]
OBJECT OF THE INVENTION
An object of the present invention is to provide a structure for preventing rotation of a stator core in an underwater motor that does not require a through hole from the outer peripheral surface of a motor frame and is excellent in workability and waterproofness.
[0005]
[Structure of the invention]
In the anti-rotation structure of the stator core in the submersible motor according to the present invention, the key groove is provided vertically on the outer peripheral surface of the stator core, and the foveation groove led out from the inner peripheral surface is provided horizontally on the opposite edge of the motor frame, the rear end of the key inserted into the key groove formed on the locking pawl outward to lock into the upper Symbol窩溝, the inner end portion of the rear end portion and窩溝keyway is connected to perpendicularly Press the stator core into the motor frame in such a way that the locking claw at the rear end of the key fitted in the key groove is locked into the groove, and the head cover is covered on the non-load side edge of the motor frame the rear surface of the locking pawl is made to face with a gap so as not to abut the joint edge of the.
[0006]
【Example】
The embodiment will be described below with reference to FIGS.
[0007]
Reference numeral 1 denotes a motor frame, 3 denotes a stator core fitted to the inner peripheral surface of the motor frame 1, and a key groove 2 is provided vertically on the outer peripheral surface thereof. Reference numeral 4 denotes a key that is inserted into the key groove 2, and a rear end portion of the key is formed on an outward locking claw 5 that locks into the post-recording groove 6. A groove 6 led out from the inner peripheral surface is provided laterally at the opposite edge of the motor frame 1 on the side opposite to the load. And as the inner end portion and the rear end portion of the upper Symbol keyway second該窩groove 6 is connected to orthogonally, keys pressed status core 3 to the motor frame 1, was inserted into the keyway 2 4 The locking claw 5 at the rear end of the locking claw 5 is locked into the groove 6, and the bolt is tightened in such a manner that the rear end surface of the locking claw 5 does not come into contact with the joining edge of the head cover 7. For example, the end of the motor frame 1 is coupled to the non-load side edge.
[0008]
【Effect of the invention】
The advantages of the structure of the present invention are listed as follows.
[0009]
Since there is no need to drill a through hole from the outer peripheral surface of the motor frame as in the prior art, it is excellent in workability and waterproofness.
[0010]
Since the key can be inserted and inserted after the stator core is press-fitted, a taper key or the like is used to prevent the stator core from rotating and to prevent it from coming off.
[0011]
During assembly of the submersible motor locking pawl rear surface of the key rear surface provided with a clearance so as not to contact, resulting in the key drop-off prevention effect while ensuring waterproofness by made to face the joint edge of the head cover.
[0012]
Since the pits and grooves for locking the locking claws of the stator core to prevent the rotation are sufficient, the workability is good.
[0013]
With the head cover removed, the key insertion state can be easily visually confirmed, and the key and the stator core can be easily attached and detached.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional side view of an essential part of a submersible motor provided with a detent structure according to the present invention.
2 is a cross-sectional view taken along line AA in FIG.
3 is a cross-sectional view taken along line BB in FIG.
4 is a longitudinal sectional side view of a main part of a motor frame portion in FIG. 1. FIG.
5 is a longitudinal sectional side view of a main part of a stator core portion in FIG. 1. FIG.
6 is a side view of the key in FIG. 1. FIG.
FIG. 7 is a longitudinal sectional side view of a main part of a submersible motor having a conventional anti-rotation structure, and shows an example in which a pin reaching a stator core from a through hole drilled from an outer peripheral surface of a motor frame is shown.
FIG. 8 is a longitudinal sectional side view of a main part of a submersible motor having a conventional anti-rotation structure, showing an example in which a bolt is screwed into a stator core from a through-hole drilled from the outer peripheral surface of the motor frame.
[Explanation of symbols]
1 Motor frame 2 Key groove 3 Stator core 4 Key 5 Locking claw 6 Fitting groove 7 Head cover

Claims (1)

And Tate設keyways on the outer peripheral surface of the stator core, and horizontally provided an窩溝derived from the inner peripheral surface on the anti-load side end edge of the motor frame, on the rear end of the key inserted into the key groove Symbol The stator core is press-fitted into the motor frame so that the rear end of the keyway and the inner end of the keyway are orthogonally connected to each other. The locking claw at the rear end of the inserted key is locked into the groove, and the rear surface of the locking claw does not come into contact with the joint edge of the head cover that is covered with the opposite edge of the motor frame. A structure for preventing rotation of the stator core in the submersible motor, characterized in that a gap is provided to face each other .

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