JP3057895B2 - Rotating electric machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating electric machine, and more particularly to a rotating electric machine having an axial round hole or a groove in an outer peripheral portion of a stator for a screw rod for fastening both brackets in an axial direction. However, the present invention relates to a technique suitable for a stator having a long and narrow stator and a narrow width in a radial direction.

[0002]

2. Description of the Related Art FIG. 6 is a sectional side view of a conventional example. In the figure, the configuration of the rotating electric machine includes a cylindrical stator 4 in which a frame 1 is fitted on the outer periphery and a coil 3 is wound around a slot 2, a shaft 6 rotatably supported by brackets 5 at both ends of the frame 1, A rotor 7 fixed to the shaft 6 and disposed inside the stator 4; an axial round hole 8 provided on an outer peripheral portion of the stator 4 and located between the slots 2; And a screw rod 9 which is passed through 8 and fastens the brackets 5 in the axial direction. Then, molding and taping (not shown) of the coil end 3a of the coil 3 are performed, and varnish processing is performed.

[0003]

In the above-mentioned conventional example, when the stator 4 is elongated and the radial dimension of the yoke is narrow, the position of the threaded rod 9 may be arranged between the adjacent slots 2. The screw rod 9 is likely to contact the coil end 3a.
For this reason, an insulating tape is wound around the coil end 3a, or a dummy jig pin is set up in the round hole 8 during molding. In assembling, when the screw rod 9 is passed through the round hole 8, the screw rod 9 may damage the coil end 3a, resulting in a defective product. Further, if the dimension of the outer periphery of the coil end 3a is excessively regulated, it protrudes into the inner periphery and damages the inner periphery of the coil end 3a when the rotor 7 is assembled, resulting in a defective product. As described above, workability is generally poor.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent a screw rod passing through an outer peripheral portion having a narrow yoke of a stator from coming into contact with a coil end and an inner periphery of the coil end from coming into contact with a rotor with good workability. An object of the present invention is to provide a rotating electric machine that can be used.

[0005]

A rotating electric machine according to the present invention comprises:
A cylindrical stator in which a frame is fitted around the outer periphery and a coil is wound around a slot; a shaft rotatably supported by brackets at both ends of the frame; and a rotation fixed to the shaft and arranged inside the stator. And an axial round hole or groove provided on the outer peripheral portion of the stator and located between the slots, and a screw rod passed through the round hole or groove and axially tightening the two brackets. A rotating electric machine including an outer capsule and an inner capsule which are fitted on the outer periphery and the inner periphery of a coil end of the coil and are made of an insulating molded product, wherein the outer capsule surrounds the inside of the threaded rod and is adjacent to the coil. An outer cylinder having an axial U-shaped groove that extends into the end in the radial direction, and an inner flange provided at an end of the outer cylinder. The inner capsule includes an inner cylinder and an end at the end of the inner cylinder. Before being established It is made of an outer flange in contact with the inner periphery of the inner flange. At this time, a lip extending to the outer cylinder is provided on the outer stator side of the outer flange, or a lip extending to the inner cylinder is provided on the inner peripheral stator side of the inner flange. It has a length in contact with the end face of the stator.

[0006]

Operation Referring to FIGS. According to the rotating electric machine of the present invention, since the inner periphery of the inner flange 14 and the outer periphery of the outer flange 24 are in contact with each other, the outer capsule 11 and the inner capsule 21 when combined are formed into concentric circles having the same dimensions and are preformed. If the outer capsule 11 and the inner capsule 21 are sequentially fitted into the coil end 3a, the coil end 3a is formed to have correct dimensions on the outer circumference, the inner circumference, and the end face. In particular,
The axial U-shaped groove 12 that goes around the inside of the screw rod 9 to be mounted sometime and that pierces the adjacent coil end 3a in the radial direction serves as a detent in the circumferential direction of the outer capsule 11,
In addition, when the screw rod 9 is passed through the round hole 8, the screw rod 9 does not damage the coil end 3a at all. The inner periphery of the coil end 3a, which is formed into a regular size and protected by the inner capsule 21, is not damaged at all when the rotor 7 is assembled.

[0007] The lip 25 serves as a guide when the outer capsule 11 is fitted after the inner capsule 21 is fitted into the coil end 3a, so that the outer periphery of the end face of the coil end 3a is not damaged. When the lip is provided on the outer capsule 11, when the inner capsule 21 is fitted, the coil end 3
The inner periphery of the end face a is not damaged. If the outer cylinder 13 is extended to the end face of the stator 4, the dimension of the axial length of the coil end 3a is reliably formed, the entire length is protected against the threaded rod 9, and the coil end 3a is considerably flexible.
Among them, the outer capsule 11 is positioned at a relatively high rigid portion due to the presence of the slot insulation 10 at the root, and the molding dimension precision of the coil end 3a is high.

[0008]

FIG. 1 is a side sectional view of an embodiment, and FIG.
3 is a perspective view of the outer capsule of FIG. 1, FIG. 4 is a perspective view of the inner capsule of FIG. 1, and FIG. 5 is an enlarged sectional view of a main part of FIG. In the figure, components having the same reference numerals as those of the conventional example have approximately the same functions, and the overlapping portions will be described first. This rotary electric machine has a cylindrical stator 4 in which a frame 1 is fitted on the outer periphery and a coil 3 is wound around a slot 2.
A shaft 6 rotatably supported by brackets 5 at both ends of the frame 1, a rotor 7 fixed to the shaft 6 and arranged inside the stator 4, and an outer peripheral portion of the stator 4. An axial round hole 8 provided between said slots 2
And a screw rod 9 which is passed through the round hole 8 and fastens the brackets 5 in the axial direction. There may be a groove which opens outward instead of the round hole 8, and a long bolt or a stud can be used as the screw rod 9.

As a characteristic structure of the embodiment, an outer capsule 11 made of an insulative molded product is provided on the outer periphery and the inner periphery of the coil end 3a of the coil 3 wrapped in the slot insulation 10.
And the inner capsule 21 are fitted. Outer capsule 11
Is an outer cylinder 1 having an axial U-shaped groove 12 which goes around the inside of the screw rod 9 and radially penetrates into the adjacent coil end 3a.
3 and an inner flange 14 provided at an end of the outer cylinder 13.
Consists of The inner capsule 21 includes an inner cylinder 23 and an outer flange 24 provided at an end of the inner cylinder 23 and in contact with the inner periphery of the inner flange 14. The insulating molded product constituting the outer capsule 11 and the inner capsule 21 is preferably a molded product such as a synthetic resin or a press board. After the outer capsule 11 and the inner capsule 21 are fitted into the coil end 3a, the coil 3 is removed. A varnish treatment may be performed together with the outer capsule 11 and the inner capsule 21.

As shown in the drawing, a lip 25 extending to the outer cylinder 13 may be provided on the stator side on the outer periphery of the outer flange 24 of the inner capsule 21. Alternatively, a lip extending to the inner cylinder 23 may be provided on the inner periphery of the inner flange 14 of the outer capsule 11 on the stator side. Further, it is preferable that the outer cylinder 13 has a length extending to a position where it comes into contact with the end face of the stator 4.

According to such a structure, the inner flange 14
And the outer periphery of the outer flange 24 are in contact with each other, so that the outer capsule 11 and the inner capsule 21 when combined form concentric circles of the same dimensions, and the outer capsule 11 and the inner capsule 21 are attached to the preformed coil end 3a. If you put in sequentially,
The coil end 3a is formed to have correct dimensions on the outer circumference, the inner circumference, and the end face. An axial U-shaped groove 12 that goes around the inside of the threaded rod 9 that is to be mounted and that extends radially into the adjacent coil end 3 a is formed in the outer capsule 11.
In addition, when the screw rod 9 is passed through the round hole 8, the screw rod 9 does not damage the coil end 3a at all. The inner periphery of the coil end 3a, which is formed into a regular size and protected by the inner capsule 21, is not damaged at all when the rotor 7 is assembled.

The lip 25 serves as a guide when the inner capsule 21 is fitted into the coil end 3a and then the outer capsule 11 is fitted, so that the outer periphery of the end surface of the coil end 3a is not damaged. When the lip is provided on the outer capsule 11, the inner periphery of the end face of the coil end 3a is not damaged when the inner capsule 21 is fitted. If the outer cylinder 13 is extended to the end face of the stator 4, the dimension of the axial length of the coil end 3a is reliably formed, the entire length is protected against the threaded rod 9, and the coil end 3a is considerably flexible. Among them, the outer capsule 11 is positioned at a portion having a relatively high rigidity due to the presence of the slot insulation 10 at the base, and the molding accuracy of the coil end 3a is high.

[0013]

According to the rotating electric machine of the present invention, there is an effect that the coil end is formed with high dimensional accuracy by the outer capsule and the inner capsule. In particular, the U-shaped groove penetrating into the adjacent coil ends is formed by the two capsules. The position can be determined reliably, and the workability can be prevented with good workability by preventing the screw rod passing through the narrow outer periphery of the stator from contacting the coil end or the coil end inner periphery from contacting the rotor. This has the effect.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an embodiment.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a perspective view of the outer capsule of FIG. 1;

FIG. 4 is a perspective view of the inner capsule of FIG. 1;

FIG. 5 is an enlarged sectional view of a main part of FIG. 1;

FIG. 6 is a sectional side view of a conventional example.

[Explanation of symbols]

 1 Frame 2 Slot 3 Coil 3a Coil end 4 Stator 5 Bracket 6 Shaft 7 Rotor 8 Round hole 9 Screw rod 10 Slot insulation 11 Outer capsule 12 U-shaped groove 13 Outer cylinder 14 Inner flange 21 Inner capsule 23 Inner cylinder 24 Outer flange 25 lips

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02K 1/18 H02K 3/30-3/52 H02K 5/04

Claims (4)

(57) [Claims] 1. A cylindrical stator in which a frame is fitted around an outer periphery and a coil is wound around a slot, a shaft rotatably supported by brackets at both ends of the frame, and an inner side of the stator fixed to the shaft. , An axial round hole or groove provided between the slots provided on the outer periphery of the stator, and a screw passing through the round hole or groove and axially tightening the two brackets. A rotating electric machine composed of a rod and an outer capsule and an inner capsule which are fitted on the outer periphery and the inner periphery of the coil end of the coil and are made of an insulative molded product; An outer cylinder having a U-shaped groove in the axial direction that extends radially into the adjacent coil end, and an inner flange provided at an end of the outer cylinder. The inner capsule includes an inner cylinder and an inner cylinder. End of tube Rotary electric machine characterized by comprising the outer flange in contact with the inner periphery of said flange is provided. 2. The rotating electric machine according to claim 1, wherein a lip extending to the outer cylinder is provided on a stator side of an outer periphery of the outer flange. 3. The rotating electric machine according to claim 1, wherein a lip extending to the inner cylinder is provided on a stator side of an inner periphery of the inner flange. 4. The rotating electric machine according to claim 1, wherein said outer cylinder has a length in contact with an end face of said stator.