JPH08275458A - Apparatus for grounding rotating machine - Google Patents

Abstract

PURPOSE: To enable space saving, reduction in the number of fixing parts and elimination of additional process in earthing of a rotating machine in such a manner that the core of the stator is grounded. CONSTITUTION: In a rotary apparatus providing a stator core 1 which is formed by stacking a large number of stator core pressing plates 1a consisting of a thin metal plate and having shallow grooves 3, 4 in such a manner that the shallow grooves 3, 4 are communicated, an elongated narrow terminal 6 connected to the end point of the earth line 5 is provided and this terminal 6 is inserted into the shallow grooves 3, 4 for plastic deformation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for connecting a ground wire of a rotary electric machine, and more particularly to taking out the ground wire of the machine from a stator of the rotary electric machine and facilitating the work of manufacturing the ground wire itself and attaching the ground wire. The present invention relates to a ground wire connecting device for a rotating electric machine.

[0002]

17 to 21 show an example of a conventional ground wire connecting device. In the figure, 1a is a stator core punched plate made of a thin steel plate member or the like and punched in a donut shape,
Reference numeral 2 is a winding groove having openings in the circumference of the inner diameter of the stator core punched plate 1a, and a required number of winding grooves are arranged at equal intervals. 1 is a stator core in which the stator core blank 1a is laminated with a predetermined core width,
After stacking a predetermined number of stator core blanks 1a, they are fixed by welding or the like (not shown), and then winding (not shown) is applied to the winding groove 2. On the end face of the stator core 1 at the intermediate portion between the outer periphery 1b of the stator core 1 and the bottom 2a of the winding groove 2,
A screw hole 20 is provided, and a small washer 23 and a spring washer 22 shown in FIGS. 18 to 20 are attached to the round crimp terminal 24 attached to the tip of the ground wire 5 shown in FIG. The fuselage is grounded by screwing and fixing it to 20.

As another conventional example, a groove portion is provided in a part of a stator core of a rotating electric machine, a strip terminal connected to an earth wire is pushed into the groove portion, and the groove portion and the strip terminal are contacted to ground. As a means to extract
There is one disclosed in Japanese Patent No. 5960.

As another conventional example, a space portion for inserting a ground is provided between an iron core and a yoke, and a ground terminal plate having a bulge portion is inserted into the space portion to press and fix the ground terminal plate. Japanese Patent Laid-Open No. 63-2538
There is one disclosed in Japanese Patent No. 43.

Further, as another conventional example, a circular hole is formed in a part of a stator core of a rotating electric machine, and a pin connected to an earth wire is driven into the circular hole to extract the ground. There is one disclosed in Japanese Laid-Open Patent Publication No. Sho 62-38061.

[0006]

In the conventional fuselage ground wire connecting device, a round crimping terminal is used as the grounding terminal and is fixed with a screw, so that the bottom portion 2a of the winding groove 2 of the stator core 1 is The distance between the stator core 1 and the outer periphery 1b needs to be equal to or larger than the width dimension of the round crimp terminal 24. Round crimp terminal 24
In order to fix with screws, it is necessary to additionally process the screw holes 20 after stacking and fixing the stator core 1, and the small washer 23,
There are drawbacks such as the need for fastening parts such as the spring washer 22 and the ground screw 21.

Another example of the conventional example in which a strip-shaped terminal is inserted into a groove portion of a stator core to extract the ground (Japanese Utility Model Laid-Open No. 57-155960) has both sides bent in a U-shape. Insert the terminal formed in the groove into the groove, crimp the terminal with a recess by using a jig, and fix it to the stator core, so a specific jig is required to fix the terminal There was a drawback that it became complicated.

[0008] Further, as another conventional example, a space is formed between a stator core and a yoke, and an earth terminal plate provided with a bulge portion is inserted and fixed at a position in the space (Japanese Patent Laid-Open No. Sho 61-88). No. 63-253843), the bulging portion of the ground terminal plate is pressure-contacted, and the ground terminal plate and the yoke come into contact with each other for grounding. Therefore, the gap between the stator core and the yoke and the bulging portion It was necessary to manage the height and dimensions.

Further, in another conventional example, a stator core is provided with a round hole in a part thereof, and a pin is driven into the round hole to take out the ground (Japanese Utility Model Laid-Open No. 62-38061). However, there is a problem that the accuracy of the pin and the round hole is important and it is necessary to manage the dimensions. The present invention has been made in order to solve the above problems, as an earth wire connecting device for taking the body ground from the stator core, without additional machining such as screw processing on the stator core, and the ground terminal Without using fasteners (washers, screws, etc.) for fixing, and without requiring a special jig to fix the ground terminal, the work process and dimensional control are easy, and the machine core is grounded from the fixed iron core. An object of the present invention is to obtain a ground wire connecting device for a rotating electric machine.

[0010]

According to a first aspect of the present invention, there is provided a ground wire connecting device for a rotary electric machine, comprising a plurality of stator core punched plates made of a thin metal material and having dovetail grooves so that the dovetail grooves communicate with each other. A rotary electric machine having a laminated stator core, comprising a strip-shaped terminal connected to a tip of an earth wire for grounding the rotary electric machine, the strip-shaped terminal being inserted into the dovetail groove and plastically deformed. It is what

A ground wire connection device for a rotating electric machine according to a second aspect of the present invention is a stator formed by laminating a large number of stator core punched plates made of a thin metal material and having holes so that the holes communicate with each other. In a rotating electric machine equipped with an iron core, a pin-shaped terminal connected to the tip of a ground wire for grounding the rotating electric machine is provided, and the pin-shaped terminal is configured to be plastically deformed by being inserted into the hole. is there.

A ground wire connecting device for a rotary electric machine according to a third aspect of the present invention is a fixing device comprising a plurality of stator core punched plates made of a thin metal material and having elongated holes so that the elongated holes communicate with each other. In a rotary electric machine equipped with a child iron core, a tip end of an earth wire for grounding the rotary electric machine has a terminal having a substantially square cross section formed in a dimension of an opposite side so that a predetermined clearance fit is obtained in the elongated hole portion, and It is configured to have a pin-shaped terminal which is fixed by inserting two diagonal corners of the terminal on the side surface of the hole.

[0013]

In the earth wire connecting device for a rotating electric machine according to the first aspect of the present invention, the strip-shaped terminal connected to the tip of the earth wire is inserted into the dovetail groove provided in the stator core of the rotating electric machine. Is plastically deformed and fixed in the dovetail groove.

In the earth wire connecting device for a rotating electric machine according to the second aspect of the present invention, the pin-shaped terminal connected to the tip of the earth wire is inserted into the hole provided in the stator core of the rotating electric machine, and the terminal is It is plastically deformed and fixed in the hole.

According to a third aspect of the present invention, there is provided a grounding wire connecting device for a rotating electric machine, comprising: an elongated hole portion provided in a stator core of the rotating electric machine;
Insert a terminal with a substantially square cross section, which is connected to the tip of the ground wire and has a diagonal dimension, and rotate the terminal at a predetermined position to form two diagonal corners on the side surface of the slot. It is bitten and fixed.

[0016]

【Example】

Example 1. An embodiment of the first invention will be described with reference to FIG. In the figure, 1a is a stator core punched plate made of a member such as a thin steel plate and punched in a donut shape, 2 is a winding groove having an opening at the circumference of the inner diameter of the stator core punched plate 1a, etc. The required number is arranged at intervals. The stator core blank 1a has an outer peripheral groove 4 and a winding groove 2 bottom portion 2a.
The inner groove 3 is provided on the inner surface of the rotor, but either the outer groove 4 or the inner groove 3 is selected depending on the structure of the rotating electric machine. Punched out. Reference numeral 1 denotes a stator core in which the stator core punched plates 1a are laminated with a predetermined iron core width. The stator core punched plates 1a are laminated in a predetermined number so that the winding grooves 2 and the grooves 3 and 4 communicate with each other, and are not shown. Although not fixed, it is fixed by welding, rivets, straps, etc., and then winding (not shown) is applied to the winding groove 2.

Next, the ground terminal of the first embodiment of the first invention will be described with reference to FIG. The ground terminal has a strip shape and is inserted into the dovetail groove 3 or dovetail groove 4 from one end, and the ground wire 5 is not crimped or fixed to the opposite end by soldering or another method. The width dimension of the portion of the terminal 6 that enters the dovetail grooves 3 and 4 is smaller than the width of the grooves 3 and 4 at the tip,
It is largely tapered toward the rear of the terminal 6. For this reason, when the terminal 6 is inserted into the dovetail grooves 3 and 4, it stops at a certain place, and when it is further driven, the terminal side surface has the dovetail groove 3,
4 It bites on the side surface and is plastically deformed and mounted.

FIG. 3 shows the second embodiment of the first invention.
It will be explained by. The ground terminal has a strip shape and is inserted into the dovetail grooves 3 and 4 from one end. The ground wire 5 is fixed to the opposite end by crimping or soldering. The tips of the terminals 7 that enter the dovetail grooves 3 and 4 are made slightly smaller than the width of the dovetail grooves 3 and 4 so that they can easily enter the grooves 3 and 4. This terminal 7
By making the both side surfaces of the terminal 7 into a serrated shape 7b from slightly behind from the guide portion 7a at the tip end, and making the width dimension to the tip of the serrated shape 7b on both sides slightly wider than the width dimension of the grooves 3 and 4. When the terminal is pushed into the dovetail grooves 3 and 4, the above-mentioned tooth tips are bited into the side surfaces of the dovetail grooves 3 and 4 to be plastically deformed and mounted.

FIG. 4 shows the third embodiment of the first invention.
This will be described below. The ground terminal is in the form of a strip and is inserted into the dovetail grooves 3 and 4 from one end. Ground wire 5 at the opposite end
Are fixed by crimping or soldering or some other method. The tip of the terminal 8 that enters the dovetail grooves 3 and 4 is smaller than the width of the dovetail grooves 3 and 4 so that it can easily enter the grooves 3 and 4. Slightly rearward from the tip, the terminal 8 is formed into a slit-like double-sided hook with a rectangular slot 8a in the center and hooks 8b on both sides, and the width dimension from the tip to the tip of the hook 8b. By making the width of the dovetail grooves 3 and 4 slightly wider, the terminal 8 is provided with the dovetail groove 3,
When it is pushed into 4, the tip of the hook portion is supported by the spring effect of the slit and bites into the dovetail grooves 3 and 4 and is attached.

FIG. 5 shows the fourth embodiment of the first invention.
It will be explained by. The ground terminal has a strip shape and is inserted into the dovetail grooves 3 and 4 from one end. The ground wire 5 is fixed to the opposite end by crimping or soldering or the like. The tip of the terminal 9 that enters the dovetail grooves 3 and 4 is smaller than the width of the dovetail grooves 3 and 4,
When viewed from above, the terminal 9 is easily inserted into the dovetail grooves 3 and 4, and the entire terminal has a hook shape, and the terminal width of the needle portion of the hook 9a is larger than the width of the dovetail grooves 3 and 4. The hook-shaped U-shaped bottom portion 9b and the tip of the fishhook-shaped portion 9a are cantilevered to have a spring effect that causes a deflection with respect to the load of the tip, and the terminals are provided in the grooves 3 and 4. When pushed in, the tip of the needle of the fishing hook portion 9a is also assisted by the above spring effect, and is bite into the side surfaces of the grooves 3 and 4 to be mounted.

FIG. 6 shows the fifth embodiment of the first invention.
It will be explained by. The ground terminal has a strip shape and is inserted into the dovetail grooves 3 and 4 from one end. The ground wire 5 is fixed to the opposite end by crimping or soldering. Terminal 10
The width of the tips entering the dovetail grooves 3 and 4 is made smaller than the width of the dovetail grooves 3 and 4 so that the dovetail grooves 3 and 4 are easily inserted. A central semi-circular protrusion 10a having a semicircular cross section is provided in the center of the terminal 10 from the front to the rear, and when the terminal 10 is pushed into the present grooves 3 and 4, the central semi-circular protrusion 10a is provided in the groove 3, Since it tries to push the terminal 10 upward by hitting the bottom of 4,
If the width dimension of the terminal 10 is set to be substantially the same as the width dimension of the dovetail grooves 3 and 4, both side surfaces of the terminal 10 are fitted into the inclined portions of the dovetail grooves 3 and 4 by the above-mentioned pushing up. .

FIG. 7 shows the sixth embodiment of the first invention.
It will be explained by. The ground terminal has a strip shape and is inserted into the dovetail grooves 3 and 4 from one end. The ground wire 5 is fixed to the opposite end by crimping, soldering, or another method. The tip of the terminal 11 that enters the dovetail grooves 3 and 4 is made smaller than the width of the dovetail grooves 3 and 4 so that the terminals 11 can easily enter the dovetail grooves 3 and 4. A vertically long cutting and bending bridge 11a is provided in the center of the terminal 11 from the front to the rear, and when the terminal 11 is pushed into the grooves 3 and 4, the cutting and bending bridge 11a is provided and hits the bottoms of the grooves 3 and 4, Since the terminal 11 is pushed upward, if the width dimension of the terminal 11 is set to be substantially the same as the width dimension of the grooves 3 and 4, both side surfaces of the terminal 11 are inclined by the above pushing. It bites into and is installed.

FIG. 8 shows the seventh embodiment of the first invention.
It will be explained by. The tips of the terminals that enter the dovetail grooves 3 and 4 are made smaller than the width of the dovetail grooves 3 and 4 so that they can easily enter the grooves 3 and 4. A vertically long cut and bent tongue 12a is provided from the front to the rear in the center of the terminal 12, and when the terminal 12 is pushed into the dovetail grooves 3 and 4, the cut and bent tongue 12a is provided.
Since the terminal 12 is pushed upward by hitting the bottom of the terminal 4, if the terminal width dimension is set to be approximately the same as the width dimension of the grooves 3 and 4, both sides of the terminal 12 are pushed by the above pushing and the side grooves of the terminal groove 3 and 4 are pushed. The cutting and bending tongue portion 12a also has the tip of the cutting and bending tongue portion 12a at the same time, and bites into the bottom surface of the groove to be mounted.

Embodiment 2 FIG. An embodiment of the second invention will be described with reference to FIG. In the figure, 1a is a stator core punched plate made of a thin steel plate member or the like and punched in a donut shape,
Reference numeral 2 is a winding groove having openings in the circumference of the inner diameter of the stator core punched plate 1a, and a required number of winding grooves are arranged at equal intervals. Further, the stator core punched plate 1a is provided with a round hole 13 at a required position on the end surface of the stator core punched plate 1a, between the bottom 2a of the winding groove 2 and the outer periphery 1b. The round holes 13 are punched at the same time when the stator core 1a is punched. Reference numeral 1 denotes a stator core in which the stator core punched plates 1a are laminated with a predetermined iron core width, and the stator core punched plates 1a are illustrated after laminating a predetermined number of sheets so that the winding groove 2 and the round hole 13 communicate with each other. It is fixed by welding, rivets, straps, etc., and then wound in the winding groove 2 (not shown)
Is applied. The circular hole 13 provided in the stator core blank 1a has a circular hole 13 so as to secure a depth from the end surface of the stator core 1 into which a terminal portion of a ground terminal described later can be inserted. The core blanks 1a may be laminated, but from the viewpoint of standardization and productivity, all the stator core blanks 1a to be laminated may be laminated with the stator core blanks 1a having the round holes 1a.

Next, the ground terminal will be described with reference to FIG. The ground terminal is pin-shaped and has a round hole 13 from one end.
Insert into. The ground wire 5 is fixed to the opposite end by crimping, soldering, or another method. The end of the terminal 14 is the round hole 1
The taper 14 is thinner than 3 and becomes thicker toward the rear, so that it can be easily inserted and can be firmly attached to the round hole 13 by being pushed.

FIG. 1 shows the second embodiment of the second invention.
This will be described with reference to 1. The ground terminal is pin-shaped and is inserted into the round hole 13 from one end. The ground wire 5 is fixed to the opposite end by crimping, soldering, or another method. The tip of the terminal 15 is narrower than the round hole 13 so that it can be easily inserted into the round hole 13. The outer diameter of the portion of the terminal 15 that is pushed into the round hole 13 is thicker than the inner diameter of the round hole 13 so that the required tightening spring is formed, and a slot 15a is inserted from the tip of the terminal 15 to the rear of the required dimension. When the pin 15 is pushed in, the outer diameter of the pin is slightly released to the inner side, so that the terminal 15 is pushed to a predetermined size and closely fitted to the round hole 13.

FIG. 1 shows the third embodiment of the second invention.
2 will be described. The ground terminal is pin-shaped and is inserted into the round hole 13 from one end. The ground wire 5 is fixed to the opposite end by crimping, soldering, or another method. The tip of the terminal 16 is made thinner than the round hole 13 to facilitate insertion into the round hole 13. A burr-like cut 16a is formed on the outer periphery of the portion of the terminal 16 that is pushed into the round hole 13, and its outer diameter is formed to be slightly larger than the inner diameter of the round hole 13. The tip end of 16a bites into the inner peripheral surface of the round hole 13 and is attached in close contact.

FIG. 1 shows the fourth embodiment of the second invention.
3 will be described. The ground terminal is pin-shaped and is inserted into the round hole 13 from one end. The ground wire 5 is fixed to the opposite end by crimping or soldering. The tip of the terminal 17 is made thinner than the round hole 13 so that it can be easily inserted into the round hole 13. The portion of the terminal 17 that is pushed into the round hole 13 has a square pile shape 17a, the diagonal dimension of which is slightly larger than the inner diameter dimension of the round hole 13, and when the terminal 17 is pushed into the round hole 13, the square pile shape is formed. The four corners of 17a bite into the round hole 13 and are attached.

Example 3. An embodiment of the third invention is shown in FIG.
4, FIG. 15 and FIG. In the figure, 1
a is a stator core punched plate made of a thin steel plate member or the like and punched in a donut shape, and 2 is a winding groove having openings in the circumference of the inner diameter of the stator core punched plate 1a, which are required at equal intervals. The number is arranged.

The stator core blank 1a is provided with an oval hole 18 at a desired position on the side surface of the stator core 1 from the bottom of the winding groove 2 to the middle of the outer circumference. This oval hole 18
Punches at the same time when punching the stator core 1. The ground terminal is a pin-shaped terminal 19 having a prismatic shape 19a, and its opposite side dimension is
It is formed to be slightly smaller than the opposite side dimension of the oval hole 18 and slightly larger in the diagonal dimension. When inserting into the oval hole 18, the opposite side of the oval hole 18 and the opposite side of the terminal are put in parallel to each other. When rotated 90 ° at the position, two corners of the prismatic pin 19a, which are diagonal to the pin-shaped terminal, are bite-mounted on the inner surface of the opposite side of the oval hole 18. FIG. 16 shows the mounted state. A round hole 13 is provided at a required position on the end surface of the stator core blank 1a, between the bottom 2a of the winding groove 2 and the outer periphery 1b. The round holes 13 are punched at the same time when the stator core punched plate 1a is punched. Reference numeral 1 denotes a stator core in which the stator core punched plates 1a are laminated with a predetermined iron core width, and the stator core punched plates 1a are illustrated after laminating a predetermined number of sheets so that the winding groove 2 and the round hole 13 communicate with each other. Not fixed but fixed by welding, rivets, straps, etc.
Then, a winding (not shown) is applied to the winding groove 2.

In the above embodiment, the dovetail grooves 3 and 4 provided on the bottom 2a of the winding groove 2 of the stator core 1 or the outer peripheral portion 1b of the stator core 1, or the winding groove 2 of the stator core 1.
A hole provided at a required position in an intermediate portion from the bottom portion 2a to the outer peripheral portion 1b (the circular hole 13 and the oval hole 18 are described in the embodiment of the present invention, but the shape thereof is not particularly specified) This is a method of grounding the fuselage by pushing in and mounting the grounding terminal of a size and shape that provides sufficient contact with the dovetail groove or the hole. Since the stator core is punched at the same time when punched, the size and shape of the dovetail grooves 3, 4, the round hole 13, and the oval hole 18 are not limited.

Further, the terminal of the above embodiment is, for example, copper,
A metal member such as iron and a ground wire may be a vinyl electric wire for appliances, a hyperlon rubber electric wire, an ethylene propylene rubber electric wire, a diatom rubber electric wire, or the like depending on the insulation type of the rotating electric machine.

Furthermore, if a conductive adhesive is applied and fixed to the above-mentioned terminal, the contact with the ground portion can be further strengthened.

[0034]

As described above, according to the first aspect of the invention, the strip-shaped terminal connected to the tip of the ground wire for grounding the rotating electric machine is provided, and the strip-shaped terminal is a dovetail groove of the stator core. Since it is configured to be plastically deformed by inserting it into the connector, it is not necessary to perform additional machining to form a ground hole after stacking the stator core, and since the ground terminal is mounted by pushing, fastening parts such as screws and washers are required. Notwithstanding, since the terminals are strip-shaped terminals, they are easy to manufacture and can be mounted in a spatially small range. Therefore, there is an effect that the ground of the small rotating electric machine can be taken out.

According to the second invention, a pin-shaped terminal connected to the tip of the ground wire for grounding the rotating electric machine is provided, and the pin-shaped terminal is inserted into the hole of the stator core to be plastically deformed. Since it is configured, it is not necessary to perform additional machining after stacking the stator core, and since the ground terminal is mounted by pushing, there is no need for fastening parts such as screws and washers, and the terminal is pin-shaped. Therefore, there is an effect that it is possible to easily control the dimensions of the terminal and the hole and take the fuselage ground wire from the fixed iron core.

According to the third invention, at the tip of the ground wire for grounding the rotating electric machine, there is provided a terminal having a substantially square cross-section formed in the oblong hole portion of the stator core so as to obtain a predetermined clearance fit. At the same time, since the pin-shaped terminal is fixed on the side surface of the slot by fixing the two corners of the terminal that are diagonal to each other, the stator core is laminated and then additionally formed. It is not necessary, and for the ground terminal, rotate the terminal at a predetermined position in the slot of the stator core, and let the two corners of the terminal which are diagonal to the side of the slot enter. Since it is fixed, there is no need for fastening parts such as screws and washers, the terminals can be easily attached, and the fuselage ground wire can be taken from the fixed iron core.

[Brief description of drawings]

FIG. 1 is a front view of a stator core showing an embodiment of the first invention.

FIG. 2 is a perspective view of a tapered strip-shaped ground terminal showing a first embodiment of the first invention.

FIG. 3 is a perspective view of a double-sided serrated strip ground terminal showing a second embodiment of the first invention.

FIG. 4 is a perspective view of a slit-shaped double-sided hook-shaped strip-shaped ground terminal according to a third embodiment of the first invention.

FIG. 5 is a perspective view of a hook-shaped strip-shaped grounding terminal showing a fourth embodiment of the first invention.

FIG. 6 is a perspective view of a strip-shaped ground terminal with a central semi-circular protrusion showing a fifth embodiment of the first invention.

FIG. 7 is a perspective view of a strip-shaped ground terminal with a cut and bent bridge showing a sixth embodiment of the first invention.

FIG. 8 is a perspective view of a strip-shaped ground terminal with a bent tongue portion showing a seventh embodiment of the first invention.

FIG. 9 is a front view of a stator core showing an embodiment of the second invention.

FIG. 10 is a perspective view of a tapered pin type ground terminal showing a first embodiment of the second invention.

FIG. 11 is a perspective view of a slotted pin type ground terminal showing a second embodiment of the second invention.

FIG. 12 is a perspective view of a pin-type grounding terminal with a burr-like notch showing a third embodiment of the second invention.

FIG. 13 is a perspective view of a square pile pin-type ground terminal showing a fourth embodiment of the second invention.

FIG. 14 is a front view showing a state where the stator core and the prismatic pin-shaped ground terminal of the third embodiment of the invention are inserted into the oval holes.

FIG. 15 is a perspective view of a prismatic pin-shaped ground terminal showing an embodiment of the third invention.

FIG. 16 is a front view showing a state where the stator core and the prismatic pin-shaped ground terminal of the third embodiment of the invention are mounted in the oval holes.

FIG. 17 is a front view of a stator core showing a conventional example.

FIG. 18 is a perspective view of a ground screw showing a conventional example.

FIG. 19 is a perspective view of a spring washer showing a conventional example.

FIG. 20 is a perspective view of a small washer showing a conventional example.

FIG. 21 is a perspective view of a round crimp terminal showing a conventional example.

[Explanation of symbols]

1 stator core, 2 winding groove, 3 with groove, 4 with groove, 5 ground wire, 6 taper shape, 7 both sides sawtooth shape, 8
Slit-shaped hooks on both sides, 9 fishing hooks, 10 central semi-circular protrusions, 11 cutting bridges, 12 cutting tongues, 13
Round hole, 14 taper shape, 15 slits, 16 burr notch, 17 square pile shape, 18 oval hole, 19 square pillar, 20 screw hole, 21 ground screw, 22 spring washer, 23 small washer, 24 Round crimp terminal.

Claims (3)

[Claims] 1. A rotary electric machine comprising a stator core made of a thin metal material and having a plurality of stator core punched plates having dovetail grooves stacked so that the dovetail grooves communicate with each other. A ground wire connecting device for a rotating electric machine, comprising: a strip-shaped terminal connected to a tip of an earth wire, the strip-shaped terminal being inserted into the dovetail groove and plastically deformed. 2. A rotating electric machine having a stator core, which is formed by laminating a plurality of stator core blanks each having a hole and made of a thin metal material so that the holes communicate with each other. A pin-shaped terminal connected to the tip of the ground wire, the pin-shaped terminal being inserted into the hole and plastically deformed. 3. A rotary electric machine comprising a stator core, which is formed by laminating a plurality of stator core punched plates made of a thin metal material and having elongated holes so that the elongated holes communicate with each other. At the tip of the ground wire for grounding, there is a terminal having a substantially square cross-section formed in a dimension of the opposite side so that a predetermined clearance fit can be obtained in the slot, and a side surface of the slot is diagonal to the terminal. A ground wire connecting device for a rotating electric machine, comprising a pin-shaped terminal that is fixed by biting one corner.