JPH0965597A - Stator for rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct coupler assembly at a low cost by protrudinglyforming double coupler guides for clamping a coupler at a surface where an end cover faces a stator cover, and forming, between the coupler guides, an elastic protrusion for energizing the coupler between the coupler guides toward the stator cover side. SOLUTION: With a coupler 4 fitted between the coupler guides 9a, 9b of an end cover 8, it is fixed in the threaded hole 13 of an end cover mounting boss 12 in a stator cover 1 with screws, fitting to a threaded hole 14 of the end cover 8. At this time, the coupler 4 between the coupler guides 9a, 9b inside the end cover 8 is clamped and fixed by an elastic protrusion 10 and a radial frame part 1a. Fixing the coupler 4 like this can absorb minor variation in dimension which may be generated at the coupler 4 through the elasticity of the elastic protrusion 10. It is thus possible to eliminate use of clamping hardware or mounting screws necessary for fixing the coupler 4, providing fixing of coupler 4 at a low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator of a rotary electric machine such as a generator.

[0002]

2. Description of the Related Art In a stator of a rotating electric machine such as a generator, a stator winding is provided on an annular stator iron core made of laminated steel plates, and a coil end of the stator winding is connected to a base end of a cord. A coupler is connected to the tip of the cord, and a stator cover 1 is attached to the axial end of the stator core as shown in FIG.
Is arranged, the cord 3 is led out from the window 2 of the stator cover 1, and the coupler 4 at the tip of the cord 3 is fixed to the stator cover 1 by the clamp fitting 5 and the mounting screw 6 having the structure shown in FIG.
Is fixed to the radial frame portion 1a of the stator cover 1, and other radial frame portions 1a of the stator cover 1 are assembled with parts such as a condenser 7, and the stator cover 1 is fixed by covering an end cover (not shown). It had a different structure. Reference numeral 4a is a flange portion of the coupler 4.

In this case, the stator cover 1 is made of aluminum and has an annular boss portion 1b at the center thereof.
Although not shown, the shaft of the rotor is rotatably pierced through the hole 1c of b, and the radial frame portion 1a is integrally formed radially on the outer periphery of the boss portion 1b. It has a structure integrated with the ring portion 1d.

[0004]

However, in the structure in which the coupler 4 is fixed to the stator cover 1 by the clamp fitting 5 and the mounting screw 6 as described above, a screw tap working operation for mounting the screw 6 on the stator cover 1 is performed. Is required
Since cutting oil is used for this tapping work, a cleaning work is required after the tapping work, and then the work of assembling the coupler 4 with the clamp metal fitting 5 and the mounting screw 6 is performed. There is a problem in that the cost of processing and the cost of parts are high to divide the content of the work, and the cost becomes high.

An object of the present invention is to provide a stator for a rotary electric machine, which can assemble a coupler at low cost.

[0006]

According to the present invention, an annular stator core is provided with a stator winding, and a stator cover is arranged at an axial end of the stator core. The object of the improvement is a stator for a rotary electric machine in which an end cover is attached, a base end of a cord is connected to a coil end of a stator winding, and a coupler is connected to a tip of the cord.

In the stator for a rotary electric machine according to the present invention, a pair of coupler guides for gripping the coupler are provided on the surface of the end cover facing the stator cover, and a coupler between the coupler guides is provided between the coupler guides. An urging means for urging the rotor toward the stator cover is provided.

In this way, when the pair of coupler guides are projected on the end cover and the urging means for urging the coupler between the coupler guides toward the stator cover is provided between the coupler guides. The coupler can be fixed by gripping the coupler between the coupler guides of the end cover and attaching the end cover to the stator cover. For this reason, a clamp fitting and a mounting screw are not required for fixing the coupler, and the coupler can be mounted at low cost. Further, due to the presence of the biasing means, it is possible to absorb some dimensional variation of the coupler.

In this case, it is preferable that the biasing means is formed by an elastic protrusion.

When the biasing means is formed by the elastic projection as described above, the elastic projection can be integrally formed with the end cover.

Further, it is preferable that the tip of the elastic protrusion is bent to form a coupler contact portion.

When the tip of the elastic projection is the bent coupler contact portion, this portion hits the coupler and can elastically and stably support the coupler.

[0013]

1 to 4 show an example of an embodiment of a stator for a rotary electric machine according to the present invention.
In this example, the present invention is applied to a capacitor excitation type generator. The parts corresponding to those of the conventional example shown in FIG. 5 are designated by the same reference numerals.

In the stator for a rotary electric machine of this example, FIG.
As shown in, on the surface of the end cover 8 facing the stator cover,
Pair-shaped coupler guide 9 for holding the coupler 4 having a rectangular cross section
a and 9b are provided in a protruding manner, and the coupler guides 9a and 9b are provided at the end cover 8 between the coupler guides 9a and 9b.
An elastic projection 10 is provided as a biasing means for biasing the coupler 4 between 9b toward the stator cover 1. The elastic protrusion 1
The tip of 0 is bent to provide a coupler contact portion 10a. Tapers 11a and 11b are provided at the entrances of the coupler guides 9a and 9b to facilitate fitting of the coupler 4. Such elastic protrusions 10 are integrally formed with the end cover 8.

In such a stator for a rotary electric machine,
The coupler 4 is provided between the coupler guides 9a and 9b of the end cover 8.
In the state of being fitted, the screw insertion hole 14 of the end cover 8 is aligned with the screw hole 13 of the end cover attachment boss 12 of the stator cover 1 and is fixed with a screw (not shown). This time,
The coupler 4 between the coupler guides 9a and 9b inside the end cover 8 is sandwiched and fixed by the elastic projection 10 and the radial frame portion 1a. By fixing the coupler 4 in this manner, even if the coupler 4 has some dimensional variation, it can be absorbed by the elasticity of the elastic protrusion 10.

The above example is a case where the present invention is applied to a capacitor excitation type generator, but the present invention is not limited to this, and a rotating electric machine such as a brush generator and an electric motor having an end cover is used. The present invention can be similarly applied to the stator.

[0017]

In the stator for a rotary electric machine according to the present invention, the pair of coupler guides are provided on the end cover so as to project the coupler between the coupler guides toward the stator cover. Since the biasing means is provided, the coupler can be fixed by gripping the coupler between the coupler guides of the end cover and attaching the end cover to the stator cover. For this reason, a clamp fitting and a mounting screw are not required for fixing the coupler, and the coupler can be mounted at low cost. Further, due to the presence of the biasing means, it is possible to absorb some dimensional variation of the coupler.

In this case, if the biasing means is formed by the elastic protrusion, the elastic protrusion can be integrally formed with the end cover.

Further, when the tip of the elastic projection is a bent coupler contact portion, this portion abuts on the coupler and can elastically and stably support the coupler.

[Brief description of drawings]

FIG. 1 is a front view showing an example of an embodiment of a stator cover side in a stator for a rotary electric machine according to the present invention.

FIG. 2 is a vertical cross-sectional view of a fixed portion of a coupler in this example.

FIG. 3 is a vertical cross-sectional view of an end cover in this example.

FIG. 4 is a bottom view of the end cover shown in FIG.

FIG. 5 is a front view of a conventional stator for a rotary electric machine on a stator cover side.

FIG. 6 is a perspective view of a clamp fitting used in FIG.

[Explanation of symbols]

 1 Stator cover 1a Radial frame part 1b Boss part 1c Hole 1d Ring part 2 Window 3 Code 4 Coupler 4a Flange part 5 Clamp fitting 6 Mounting screw 7 Capacitor 8 End cover 9a, 9b Coupler guide 10 Elastic projection 10a Coupler contact part 11a , 11b Tapered part 12 End cover mounting boss 13 Screw hole 14 Screw insertion hole

Claims (3)

[Claims] 1. A stator winding is provided on an annular stator core, a stator cover is arranged at an axial end of the stator core, and an end cover is attached to the stator cover. In a stator for a rotating electric machine, wherein a base end of a cord is connected to a coil end of a stator winding and a coupler is connected to a tip of the cord, the coupler is provided on a surface of the end cover facing the stator cover. A rotating electric machine characterized in that a pair of coupler guides for gripping are provided in a protruding manner, and an urging means for urging the coupler between the coupler guides toward the stator cover is provided between the coupler guides. For the stator. 2. The stator for a rotating electric machine, wherein the biasing means is formed of an elastic protrusion. 3. The coupler abutment portion is provided by bending the tip of the elastic protrusion.
The stator for rotating electric machine according to.