JPH09285051A - Rotor in dynamo electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotor in a dynamo electric machine, in which a shaft joining part is prevented from rotating without using a locking pin, by pushing the shaft joining part to a rotor positioning face. SOLUTION: A plate-shaped shaft joining part 4b joined with a rotating shaft 1. The shaft joining part 4b on one side has a shaft fit-contacting face 4c to be fit-contacted to a rotor positioning face 1a of the rotating shaft 1. The shaft fit-contacting face 4c has a locking part 14 projected from its face. The projected locking part 14 is fitted to a rotor locking groove 15 of the rotor positioning face 1a in the rotor 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor for a rotary electric machine used in a rotary electric machine such as a magnet generator or an inductor rotary pulsar.

[0002]

2. Description of the Related Art FIGS. 11A and 11B show the structure of a conventional magnet generator which is a kind of rotating electric machine having a rotor for a rotating electric machine of this kind.

In this magnet generator, a small diameter portion 1b is provided on the tip side of a rotary shaft 1 which is a crankshaft of an internal combustion engine, with a rotor positioning surface 1a which is a step portion as a boundary. A detent pin 2 is planted at one location in the circumferential direction of the small diameter portion 1b. The tip side outer circumference of the small diameter portion 1b is a screw portion 1c.

A magnet rotor 3 of the magnet generator is fastened to the small diameter portion 1b. The magnet rotor 3 is provided with a bowl-shaped yoke 4 having a tubular portion 4a and a shaft coupling portion 4b formed of a bottom plate portion that closes the base end side thereof, and the tubular portion 4a of the bowl-shaped yoke 4 is provided.
It has a structure in which a plurality of permanent magnets 5 are attached to the inner circumference of. The permanent magnets 5 are magnetized in the radial direction such that different magnetic poles are present alternately in the circumferential direction of the bowl-shaped yoke 4. A mounting hole 6 is provided at the center of the shaft coupling portion 4b of the bowl-shaped yoke 4, and a key groove 7 is provided at one location in the circumferential direction of the mounting hole 6.

Prior to mounting the bowl-shaped yoke 4 of the magnet rotor 3 on the small-diameter portion 1b of the rotary shaft 1, a tubular member 8 is fitted into the small-diameter portion 1b and brought into contact with the rotor positioning surface 1a. The bowl-shaped yoke 4 is fitted into the mounting hole 6 of the shaft coupling portion 4b and assembled, and then the tubular member 9 is fitted into the small diameter portion 1b and brought into contact with the shaft coupling portion 4b. The bowl-shaped yoke 4 is fastened to the rotary shaft 1 by a nut 10 that is fitted with a washer 10a on the portion 1c in advance.

In the cylindrical portion 4a of the bowl-shaped yoke 4, the stator 1 is
1 is incorporated. The stator 11 has an annular portion 12a.
And a stator core 12 having salient poles 12b radially protruding from the outer periphery of the annular portion 12a, and the stator core 12
And an armature coil (not shown) wound around each salient pole 12b.

The stator 11 has a small-diameter tip portion 13a in a boss portion 13 of an internal combustion engine that is provided so as to surround the rotary shaft 1 and project.
It is supported on the internal combustion engine side by fitting the inner circumference of the annular portion 12a of the stator core 12 to the.

[0008]

However, such a conventional magnet rotor 3 as a rotor for a rotary electric machine has the following problems.
A key groove 7 is provided on the inner periphery of the mounting hole 6 of the shaft coupling portion 4b, and the lock pin 2 is fitted in the key groove 7 to prevent rotation and fastened with the nut 10. Therefore, it is necessary to make a hole for planting in the small-diameter portion 1b adjacent to the rotor positioning surface 1a composed of a step portion. In this case, it is necessary to make a hole immediately next to the rotor positioning surface 1a. Since the rotor positioning surface 1a cannot be obstructed and a unavoidable result, a hole is made at a position slightly away from the rotor positioning surface 1a, and the detent pin 2 is implanted. For this reason, the bowl-shaped yoke 4 which is stopped by the rotation stop pin 2 must be arranged at a position corresponding to the rotation prevention pin 2, and in this relationship, the small diameter portion 1b adjacent to the rotor positioning surface 1a has a spacer. However, since the cylindrical member 8 has to be interposed, the number of parts increases, which causes a problem of cost increase.

An object of the present invention is to provide a rotor for a rotating electric machine, which can stop the rotation by abutting the shaft coupling portion on the rotor positioning surface of the rotary shaft without using the rotation stopping pin.

Another object of the present invention is to provide a rotor for a rotary electric machine which can prevent the shaft coupling portion from falling.

[0011]

According to a first aspect of the present invention, there is provided a rotor for a rotary electric machine, wherein a shaft coupling portion fastened to a rotary shaft is formed in a plate shape, and one surface of the shaft coupling portion is provided on a rotary shaft side. Is a shaft contact surface for contacting the rotor positioning surface provided, and the shaft contact surface is to be fitted in a rotor detent groove provided on the rotor positioning surface of the rotary shaft. Is provided so as to project from the shaft contact surface.

When the rotation preventing projection is provided on the shaft abutting surface formed by one surface of the shaft connecting portion so as to project from the shaft abutting surface, the shaft connecting portion has the shaft abutting surface of the rotating shaft. In the state of directly abutting on the rotor positioning surface, the rotation preventing protrusion of the shaft contacting surface can be fitted into the rotor rotation preventing groove of the rotor positioning surface to prevent rotation. Therefore, it is not necessary to interpose a tubular member between the rotor positioning surface and the shaft coupling portion, and the number of parts can be reduced.

In the rotor for a rotating electric machine according to a second aspect, the shaft coupling portion fastened to the rotary shaft is formed in a plate shape, and one surface of the shaft coupling portion is a rotor positioning surface provided on the rotary shaft side. Is a shaft abutment surface for abutting against the shaft, and the shaft abutment surface has a rotation preventing projection for fitting into a rotor rotation preventing groove provided on a rotor positioning surface of the rotating shaft. A fall prevention protrusion for contacting the outer periphery of the portion of the rotary shaft where the rotor positioning surface is provided is provided so as to project from the shaft contact surface.

When the rotation preventing projection is provided on the shaft abutting surface formed by one surface of the shaft connecting portion so as to project from the shaft abutting surface, the shaft connecting portion has the shaft abutting surface of the rotating shaft. In the state of directly abutting on the rotor positioning surface, the rotation preventing protrusion of the shaft contacting surface can be fitted into the rotor rotation preventing groove of the rotor positioning surface to prevent rotation. Therefore, it is not necessary to interpose a tubular member between the rotor positioning surface and the shaft coupling portion, and the number of parts can be reduced.

Further, when the fall prevention projection is provided so as to project from the shaft abutment surface and the fall prevention projection is brought into abutment with the outer periphery of the portion of the rotary shaft where the rotor positioning surface is provided, the shaft coupling portion is provided. It is possible to more surely prevent the falling. Further, according to such a structure, it is possible to increase the fitting force between the rotary shaft and the shaft coupling portion and improve the reliability.

In the rotor for a rotary electric machine according to a third aspect of the present invention, the shaft coupling portion is provided to project from the center of the rotor positioning surface of the rotary shaft, or the shaft coupling portion is fastened to the rotary shaft. It is characterized in that it has a mounting hole for allowing the bolt to pass therethrough, and that the rotation preventing projection is provided so as not to project into the mounting hole of the shaft coupling portion.

When the mounting hole is provided in the shaft coupling portion in this manner, the mounting hole of the shaft coupling portion is inserted into the tip portion projecting from the center of the rotor positioning surface of the rotary shaft, and the shaft coupling portion is fastened with the nut. Alternatively, the bolt can be passed through the mounting hole of the shaft coupling portion and screwed to the rotary shaft to fasten the shaft coupling portion with the bolt.

In the rotor for a rotating electric machine according to a fourth aspect, the rotation preventing projection is formed by cutting and raising a part of the shaft coupling portion.

When the anti-rotation protrusion is formed by cutting and raising a part of the shaft coupling portion as described above, the anti-rotation protrusion is formed by utilizing a part of the shaft coupling portion without adding a separate component. be able to.

In the rotor for a rotary electric machine according to a fifth aspect of the present invention, the rotation preventing projection is formed by stamping out a part of the shaft coupling portion.

When the anti-rotation protrusion is formed by punching out a part of the shaft coupling portion as described above, the anti-rotation protrusion can be formed by utilizing a part of the shaft coupling portion without adding a separate component. You can

In the rotor for a rotating electric machine according to the sixth aspect, a plurality of the tilt-preventing projections are provided in the shaft coupling portion at intervals in the circumferential direction of the outer periphery of the portion of the rotary shaft where the rotor positioning surface is provided. It is characterized by being.

When a plurality of fall prevention projections are provided on the shaft coupling portion at intervals in the circumferential direction of the outer periphery of the portion of the rotary shaft where the rotor positioning surface is provided, the plurality of fall prevention projections are provided. The projection can surely prevent the shaft coupling portion from falling.

In the rotor for a rotating electric machine according to the seventh aspect, the fall prevention protrusion is provided in the shaft coupling portion in an arc shape in the circumferential direction of the outer periphery of the portion of the rotary shaft where the rotor positioning surface is provided. It is characterized by

As described above, when the fall prevention protrusion is provided on the shaft coupling portion in a circular arc shape in the circumferential direction of the outer periphery of the portion of the rotary shaft where the rotor positioning surface is provided, the arc-shaped fall prevention protrusion allows the shaft to be prevented. It is possible to reliably prevent the joint portion from falling.

In the rotor for a rotary electric machine according to an eighth aspect of the present invention, the fall prevention projection is formed by cutting and raising a part of the shaft coupling portion.

When the fall prevention protrusion is formed by cutting and raising a part of the shaft coupling portion as described above, the fall prevention protrusion is formed by utilizing a part of the shaft coupling portion without adding a separate component. be able to.

In the rotor for a rotary electric machine according to claim 9, the fall prevention projection is formed by punching out a part of the shaft coupling portion.

When the fall prevention protrusion is formed by punching out a part of the shaft coupling portion as described above, the fall prevention protrusion can be formed by utilizing a part of the shaft coupling portion without adding a separate component. You can

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION FIGS. 1 (A) to 1 (C) and FIG.
1 shows a first example in which the present invention is applied to a magnet rotor 3 of a magneto generator driven by a rotary shaft 1 composed of a crankshaft of an internal combustion engine. The parts corresponding to those in FIGS. 11A and 11B described above are denoted by the same reference numerals.

In the magnet rotor 3 of this example, the rotary shaft 1
Shaft coupling part 4 composed of a bottom plate part of a bowl-shaped yoke 4 fastened to
b is formed in a plate shape, and one surface of the shaft coupling portion 4b serves as a shaft contact surface 4c for contacting with the rotor positioning surface 1a including a step portion provided on the rotary shaft 1 side. On the shaft abutment surface 4c of the shaft coupling portion 4b, there is a rotation stop projection 14 for fitting into a rotor rotation stop groove 15 provided on the rotor positioning surface 1a of the rotary shaft 1. It is provided so as to project from the surface 4c. The anti-rotation protrusion 14 is provided by punching out a part of the shaft coupling portion 4b.

In the bowl-shaped yoke 4 of the magnet rotor 3, the detent 14 is fitted in the rotor detent groove 15 and the shaft abutment surface 4c is directly abutted against the rotor positioning surface 1a of the rotary shaft 1. In this state, the cylindrical member 9 and the washer 10 are attached to the small diameter portion 1b protruding from the center of the rotor positioning surface 1a of the rotating shaft 1.
It is fastened with a nut 10 fitted with a and screwed into the screw portion 1c.

In the cylindrical portion 4a of the bowl-shaped yoke 4, a stator 11 having a structure similar to that of the conventional example is incorporated in the same manner as in the conventional example, and is supported by a boss portion 13 of the internal combustion engine.

As described above, when the rotation preventing projection 14 is provided so as to project from the shaft abutting surface 4c on the shaft abutting surface 4c formed by one surface of the shaft connecting portion 4b of the bowl-shaped yoke 4, the shaft connecting portion 4b is formed. With the shaft abutting surface 4c directly abutting on the rotor positioning surface 1a of the rotary shaft 1, the anti-rotation projection 14 of the shaft abutting surface 4c is inserted into the rotor anti-rotation groove of the rotor positioning surface 1a. 15
It can be fitted to and locked against rotation. Therefore, it is not necessary to interpose the cylindrical member 8 between the rotor positioning surface 1a and the shaft coupling portion 4b as shown in FIG. 11A, and the number of parts can be reduced.

FIG. 3 shows a magnet rotor 3 of a magnet generator driven by a rotary shaft 1 which is a crankshaft of an internal combustion engine according to the present invention.
2 shows a second example applied to. The parts corresponding to those in FIGS. 1A to 1C and FIG. 2 described above are denoted by the same reference numerals.

This example is a modification of the first example, and the small-diameter portion 1 of the rotary shaft 1 protruding from the shaft coupling portion 4b of the bowl-shaped yoke 4.
The length of b is shorter than that of FIG. 1 (A), and the washer 10a fitted to the small diameter portion 1b is directly contacted with the shaft coupling portion 4b, and is fastened with the nut 10 screwed to the screw portion 1c. There is. Other configurations are the same as in the first example.

As in this example, the shaft coupling portion 4 of the bowl-shaped yoke 4
By shortening the length of the small diameter portion 1b of the rotary shaft 1 protruding from b, the tubular member 9 used in the first example can be omitted. Therefore, the number of parts can be further reduced as compared with the first example.

FIGS. 4 (A) to 4 (C) show a third example in which the present invention is applied to a magnet rotor 3 of a magneto generator driven by a rotary shaft 1 composed of a crankshaft of an internal combustion engine. is there.
In addition, the same code | symbol is attached | subjected and shown to the part corresponding to FIG. 1 (A)-(C) of the 1st example mentioned above.

In the magnet rotor 3 of this embodiment, the shaft abutting surface 4c of the shaft coupling portion 4b of the bowl-shaped yoke 4 is rotated adjacent to the mounting hole 6 at a position slightly separated from the mounting hole 6. The stopper projection 14 is provided so as to protrude from the shaft abutting surface 4c by punching out a part of the shaft coupling portion 4b.
The anti-rotation protrusion 14 is attached to the rotor positioning surface 1a of the rotary shaft 1 by making the anti-rotation protrusion 14 correspond to the radial position.
Is provided with a rotor anti-rotation groove 15 for fitting with.

The other structure is the same as that of the first example. Further, the shaft coupling portion 4b of the bowl-shaped yoke 4 is attached to the rotating shaft 1 by the nut 1
As the structure to be fastened at 0, there are the structure shown in FIG. 2 and the structure shown in FIG. 3 as in the first example.

With such a structure, the same effect as in the first example can be obtained.

FIGS. 5A and 5B show a fourth example in which the present invention is applied to a magnet rotor 3 of a magneto generator driven by a rotary shaft 1 composed of a crankshaft of an internal combustion engine. . In addition, the same code | symbol is attached | subjected and shown to the part corresponding to FIG. 1 (A)-(C) of the 1st example mentioned above.

In the magnet rotor 3 of this example, as in the first example, the shaft abutment surface 4 of the shaft coupling portion 4b of the bowl-shaped yoke 4 is formed.
In c, a detent protrusion 14 is provided adjacent to and in contact with the mounting hole 6 by punching out a part of the shaft coupling portion 4b. On the rotor positioning surface 1a of the rotary shaft 1,
A rotor rotation stop groove 15 into which the rotation stop protrusion 14 is fitted is provided. In this example, the shaft abutment surface 4c of the shaft coupling portion 4b of the bowl-shaped yoke 4 is provided on the outer periphery of the portion where the rotor positioning surface 1a of the rotary shaft 1 is provided in addition to the rotation stopper projection 14 as described above. The four fall prevention projections 16 for abutting are made to protrude from the shaft abutting surface 4c by cutting and raising a part of the shaft coupling portion 4b adjacent to the mounting hole 6 from the mounting hole 6 side. It is provided. These fall prevention protrusions 16 are provided dispersed in the circumferential direction of the mounting hole 6.

The other structure is the same as that of the first example. Further, the shaft coupling portion 4b of the bowl-shaped yoke 4 is attached to the rotating shaft 1 by the nut 1
As the structure to be fastened at 0, there are the structure shown in FIG. 2 and the structure shown in FIG. 3 as in the first example.

With such a structure, the same effect as in the first example can be obtained. Further, as in this example, four tilting preventing projections 16 for contacting the outer circumference of the portion of the rotary shaft 1 where the rotor positioning surface 1a is provided are provided on the shaft contact surface 4c of the shaft coupling portion 4b. With this, it is possible to more reliably prevent the shaft coupling portion 4b of the bowl-shaped yoke 4 from falling.

FIGS. 6A and 6B show a fifth example in which the present invention is applied to a magnet rotor 3 of a magneto generator driven by a rotary shaft 1 composed of a crankshaft of an internal combustion engine. . In addition, the same code | symbol is attached | subjected and shown to the part corresponding to the above-mentioned 4th example.

In the magnet rotor 3 of this example, each of the tilt preventing projections 16 is attached to the shaft contact surface 4c of the shaft coupling portion 4b of the bowl-shaped yoke 4 from a position slightly separated from the mounting hole 6. It is provided so as to protrude from the shaft abutting surface 4c by cutting and raising a part of the shaft coupling portion 4b toward the 6 side. Other configurations are similar to those of the fourth example.

Even with such a structure, the same effect as in the fourth example can be obtained.

FIGS. 7A and 7B show a sixth example in which the present invention is applied to a magnet rotor 3 of a magneto generator driven by a rotary shaft 1 composed of a crankshaft of an internal combustion engine. . In addition, the same code | symbol is attached | subjected and shown to the part corresponding to the above-mentioned 4th example.

In the magnet rotor 3 of this embodiment, each of the tilt preventing projections 16 is axially coupled to the shaft abutting surface 4c of the axial coupling portion 4b of the bowl-shaped yoke 4 from a position slightly separated from the mounting hole 6. It is provided so as to project from the shaft contact surface 4c by punching out a part of the portion 4b. Other configurations are
This is similar to the fourth example.

With such a structure, the same effect as that of the fourth example can be obtained.

FIG. 8 shows a magnet rotor 3 of a magnet generator driven by a rotary shaft 1 which is a crankshaft of an internal combustion engine according to the present invention.
7 shows a seventh example applied to. In addition, the same code | symbol is attached | subjected and shown to the part corresponding to the above-mentioned 4th example.

In the magnet rotor 3 of this embodiment, one fall preventing projection 16 is axially coupled to the shaft abutting surface 4c of the shaft coupling portion 4b of the bowl-shaped yoke 4 from a position slightly separated from the mounting hole 6. By punching out a part of the portion 4b in an arc shape,
It is provided so as to protrude in an arc shape from the shaft contact surface 4c. Other configurations are similar to those of the fourth example.

Even with such a structure, the same effect as in the fourth example can be obtained.

In addition, in the above-mentioned fourth, fifth and sixth examples, four collapse prevention projections 16 are provided, but the number thereof may be any number as long as the collapse prevention effect of the magnet rotor 3 can be obtained.

FIG. 9 shows a magnet rotor 3 of a magnet generator driven by a rotary shaft 1 which is a crankshaft of an internal combustion engine according to the present invention.
9 shows an eighth example applied to. In addition, the same code | symbol is attached | subjected and shown to the part corresponding to the 2nd example mentioned above.

In the magnet rotor 3 of this example, the rotary shaft 1
The small-diameter portion 1b is not provided at the center of the rotor positioning surface 1a, but a screw hole 17 is provided instead. The shaft coupling portion 4b of the bowl-shaped yoke 4 has its shaft abutment surface 1a directly abutted on the rotor positioning surface 1a of the rotary shaft 1, and its mounting hole 6 aligned with the screw hole 17 so that the bolt 18 Is fastened to the rotary shaft 1 by being screwed into the screw hole 17 through the mounting hole 6.

Even with such a structure, the same effect as that of the second example can be obtained.

The structure like the eighth example in which the shaft coupling portion 4b is fastened to the rotary shaft 1 by the bolt 18 is shown in FIG. 4 (A).
To (C), a fourth example shown in FIGS. 5 (A) and (B)
Example, 5th example shown in FIGS. 6 (A) and (B), FIG. 7 (A)
The same can be applied to the sixth example shown in (B) and the seventh example shown in FIG.

FIGS. 10A and 10B show a ninth example in which the present invention is applied to a rotor 19 of an inductor rotary pulsar driven by a rotary shaft 1 composed of a cam shaft of an internal combustion engine. is there.

The rotor 19 is provided with one inductor 21 projecting from the outer periphery of the shaft coupling portion 20 made of a circular iron plate, and the mounting hole 6 is provided at the center. One surface of the shaft coupling portion 20 serves as a shaft contact surface 20a for contacting the rotor positioning surface 1a including a step portion provided on the rotary shaft 1 side. On the shaft contact surface 20a of the shaft coupling portion 20, there is provided a rotation stopper projection 14 for fitting into a rotor rotation stopper groove 15 provided on the rotor positioning surface 1a of the rotary shaft 1. It is provided so as to project from the surface 20a. The anti-rotation protrusion 14 is provided by punching out a part of the shaft coupling portion 20.

The inductor rotary pulsar is provided with a stator 24 composed of an iron core 22 arranged at a position facing the inductor 21 and a pulse generating coil 23 wound around the iron core 22.

The fastening of the shaft coupling portion 20 to the rotary shaft 1 is performed in the same manner as shown in FIG. 2 or 3.

Incidentally, also in this ninth example, the shaft coupling portion 2
The fastening of 0 to the rotary shaft 1 can be performed using the bolt 18 as in the eighth example shown in FIG.

The constitution requirements of some of the inventions described in the specification of the present application will be described below.

(1) The bowl-shaped yoke of the magnet rotor is attached to the center of the shaft coupling portion on the bottom side of a small diameter portion projecting beyond the rotor positioning surface on the tip side of the rotation shaft. In a fastening structure of a magnet rotor with respect to an internal combustion engine rotating shaft fitted with a hole and fastened to the rotating shaft with a nut, the shaft coupling portion fastened to the rotating shaft is formed in a plate shape,
One surface of the shaft coupling portion serves as a shaft contact surface for contacting a rotor positioning surface provided on the rotary shaft side, and the shaft contact surface includes a rotor positioning surface of the rotary shaft. A rotation preventing projection for fitting into the provided rotor rotation preventing groove is provided so as to project from the shaft abutting surface, and the bowl-shaped yoke is provided with the rotation preventing protrusion in the rotor rotation preventing groove. An internal combustion engine rotary shaft, which is fitted and fastened with a nut screwed to a small diameter portion of the rotary shaft in a state where the shaft coupling portion directly abuts on the rotor positioning surface of the rotary shaft. Magnet rotor fastening structure.

(2) The bowl-shaped yoke of the magnet rotor is attached to the center of the shaft coupling portion on the bottom side of the small-diameter portion projecting on the tip side of the rotation shaft with the rotor positioning surface as the boundary. In a fastening structure of a magnet rotor with respect to an internal combustion engine rotating shaft fitted with a hole and fastened to the rotating shaft with a nut, the shaft coupling portion fastened to the rotating shaft is formed in a plate shape,
One surface of the shaft coupling portion serves as a shaft contact surface for contacting a rotor positioning surface provided on the rotary shaft side, and the shaft contact surface includes a rotor positioning surface of the rotary shaft. The rotation preventing projection for fitting into the provided rotor rotation preventing groove and the fall prevention projection for contacting with the outer periphery of the portion of the rotary shaft where the rotor positioning surface is provided are provided in the shaft. The bowl-shaped yoke is provided so as to project from the abutment surface, and the bowl-shaped yoke fits the detent protrusion into the rotor detent groove and directly abuts the shaft coupling portion on the rotor positioning surface of the rotating shaft. Internal combustion characterized by being fastened with a nut screwed to a small diameter portion of the rotary shaft in a state where the fall-prevention projection is in contact with the outer periphery of the portion of the rotary shaft where the rotor positioning surface is provided. A structure for fastening the magnet rotor to the engine rotation axis.

(3) In the fastening structure of the magnet rotor with respect to the internal combustion engine rotary shaft, in which the bowl-shaped yoke of the magnet rotor is fastened to the tip end side of the rotary shaft, the shaft coupling portion fastened to the rotary shaft is It is formed in a plate shape, and one side of the shaft coupling portion is
It is a shaft contact surface for contacting the rotor positioning surface provided on the rotary shaft side, and the shaft contact surface is for the rotor detent provided on the rotor positioning surface of the rotary shaft. A rotation preventing projection for fitting in the groove is provided so as to protrude from the shaft abutting surface, a screw hole is opened in the center of the rotor positioning surface of the rotating shaft, and the bowl-shaped yoke is the rotation preventing means. The protrusion is fitted into the rotor rotation preventing groove, and the bolt which is inserted into the mounting hole of the shaft coupling portion with the shaft coupling portion directly abutting the rotor positioning surface of the rotation shaft is screwed into the screw of the rotation shaft. A structure for fastening a magnet rotor to a rotary shaft of an internal combustion engine, which is fastened by being screwed into a hole.

(4) In the fastening structure of the magnet rotor to the internal-combustion-engine rotary shaft in which the bowl-shaped yoke of the magnetic rotor is fastened to the tip end side of the rotary shaft, the shaft coupling portion to be fastened to the rotary shaft is It is formed in a plate shape, and one side of the shaft coupling portion is
It is a shaft contact surface for contacting the rotor positioning surface provided on the rotary shaft side, and the shaft contact surface is for the rotor detent provided on the rotor positioning surface of the rotary shaft. An anti-rotation projection for fitting in the groove and a fall-prevention projection for abutting the outer periphery of the portion of the rotary shaft where the rotor positioning surface is provided are provided so as to project from the shaft abutting surface. A screw hole is opened in the center of the rotor positioning surface of the rotary shaft, and the bowl-shaped yoke fits the detent protrusion into the rotor detent groove and is attached to the rotor positioning face of the rotating shaft. The bolt passed through the mounting hole of the shaft coupling portion in a state where the shaft coupling portion is directly abutted and the fall prevention projection is brought into contact with the outer periphery of the portion of the rotary shaft where the rotor positioning surface is provided Check that it is fastened by being screwed into the screw hole of the rotary shaft. Fastening structure of the magnet rotor to the internal combustion engine rotational shaft to symptoms.

(5) Item (1), (2), (3) or (4) above, wherein the anti-rotation protrusion is formed by cutting and raising a part of the shaft coupling portion. A fastening structure of a magnet rotor to a rotary shaft of an internal combustion engine according to claim 1.

(6) In the item (1), (2), (3) or (4), the anti-rotation protrusion is formed by punching out a part of the shaft coupling portion. A fastening structure for a magnet rotor to a rotating shaft of an internal combustion engine as described.

(7) A plurality of the tilt-preventing projections are provided in the shaft coupling portion at intervals in the circumferential direction of the outer periphery of the portion of the rotary shaft where the rotor positioning surface is provided. (2), (4), (5) or (6)
The fastening structure of the magnet rotor with respect to the rotating shaft of the internal combustion engine according to the item.

(8) The fall prevention protrusion is provided in the shaft coupling portion in an arc shape in the circumferential direction of the outer periphery of the portion of the rotary shaft where the rotor positioning surface is provided. (2), (4), (5) or (6) The structure for fastening a magnet rotor to a rotary shaft of an internal combustion engine according to item (6).

(9) The above-mentioned fall-prevention projections are formed by cutting and raising a part of the above-mentioned shaft coupling portion, (2), (4), (5), (6),
The fastening structure of a magnet rotor with respect to an internal-combustion-engine rotation shaft as described in (7) or (8).

(10) The above-mentioned fall-prevention projections are formed by punching out a part of the above-mentioned shaft coupling portion, (2), (4), (5), (6),
The fastening structure of a magnet rotor with respect to an internal-combustion-engine rotation shaft as described in (7) or (8).

[0076]

In the rotor for a rotating electric machine according to the first aspect of the present invention, since the rotation preventing projection is provided on the shaft contact surface formed by one surface of the shaft coupling portion so as to project from the shaft contact surface, In the shaft coupling portion, with the shaft abutment surface directly abutting on the rotor positioning surface of the rotary shaft, the detent protrusion of the shaft abutment surface is fitted into the rotor detent groove of the rotor positioning surface. You can stop it. Therefore, it is not necessary to interpose a tubular member between the rotor positioning surface and the shaft coupling portion, and the number of parts can be reduced.

In the rotor for a rotating electric machine according to the second aspect, since the rotation preventing projection is provided on the shaft abutting surface formed by one surface of the shaft connecting portion so as to project from the shaft abutting surface, the shaft connecting portion is formed. With the shaft abutting surface directly contacting the rotor positioning surface of the rotary shaft, the rotation preventing projection of the shaft abutting surface is fitted into the rotor rotation preventing groove of the rotor positioning surface. It can be stopped. Therefore, it is not necessary to interpose a tubular member between the rotor positioning surface and the shaft coupling portion, and the number of parts can be reduced.

Further, in this rotor for a rotating electric machine,
Since the fall prevention protrusion is provided so as to project from the shaft contact surface and the fall prevention protrusion is brought into contact with the portion of the rotary shaft where the rotor positioning surface is provided, the fall of the shaft coupling portion can be more reliably performed. Can be prevented. Further, according to such a structure, it is possible to increase the fitting force between the rotary shaft and the shaft coupling portion and improve the reliability.

[Brief description of drawings]

FIG. 1A is a longitudinal sectional view showing a first example in which the present invention is applied to a magnet rotor of a magneto generator driven by a rotary shaft composed of a crankshaft of an internal combustion engine, and FIGS. It is a longitudinal cross-sectional view and a side view of a portion centered on a mounting hole of the shaft coupling portion of (A).

FIG. 2 is a vertical sectional view showing a fastening structure in the magnet rotor of the first example.

FIG. 3 is a vertical cross-sectional view showing a second example in which the present invention is applied to a magnet rotor of a magneto generator driven by a rotary shaft composed of a crankshaft of an internal combustion engine.

FIG. 4A is a longitudinal sectional view showing a third example in which the present invention is applied to a magnet rotor of a magneto generator driven by a rotary shaft composed of a crankshaft of an internal combustion engine, and FIGS. It is a longitudinal cross-sectional view and a side view of a portion centered on a mounting hole of the shaft coupling portion of (A).

5A is a longitudinal sectional view showing a fourth example in which the present invention is applied to a magnet rotor of a magneto generator driven by a rotary shaft composed of a crankshaft of an internal combustion engine, and FIG. FIG. 6 is a side view of a portion centering on a mounting hole of the shaft coupling portion of FIG.

FIG. 6 (A) is a vertical cross-sectional view showing a fifth example in which the present invention is applied to a magnet rotor of a magneto generator driven by a rotary shaft composed of a crank shaft of an internal combustion engine, and FIG. 6 (B) is (A). FIG. 6 is a side view of a portion centering on a mounting hole of the shaft coupling portion of FIG.

FIG. 7 (A) is a vertical cross-sectional view showing a sixth example in which the present invention is applied to a magnet rotor of a magneto generator driven by a rotary shaft composed of a crankshaft of an internal combustion engine, and FIG. 7 (B) is (A). FIG. 6 is a side view of a portion centering on a mounting hole of the shaft coupling portion of FIG.

FIG. 8 is a side view of a portion centering on a mounting hole of a shaft coupling portion in a seventh example in which the present invention is applied to a magnet rotor of a magneto generator driven by a rotary shaft including a crank shaft of an internal combustion engine. .

FIG. 9 is a longitudinal sectional view of an essential part of an eighth example in which the present invention is applied to a magnet rotor of a magneto generator driven by a rotary shaft composed of a crankshaft of an internal combustion engine.

FIG. 10 (A) is a side view showing a ninth example in which the present invention is applied to a rotor of an inductor rotary pulsar driven by a rotary shaft composed of a cam shaft of an internal combustion engine, and FIG. FIG. 6 is a longitudinal sectional view of a main part showing a state in which the child is attached to a rotation shaft.

FIG. 11A is a vertical cross-sectional view showing a magnet rotor of a magneto generator driven by a rotary shaft composed of a crankshaft of a conventional internal combustion engine, and FIG. 11B is a mounting hole of a shaft coupling portion of FIG. It is a side view of the part centering on.

[Explanation of symbols]

 1 rotary shaft 1a rotor positioning surface 1b small diameter part 1c screw part 2 non-rotating pin 3 magnet rotor 4 bowl-shaped yoke 4a cylinder part 4b shaft connecting part consisting of bottom plate part 4c shaft contact surface 5 permanent magnet 6 mounting hole 7 key Groove 8 Cylindrical member 9 Cylindrical member 10 Nut 10a Washer 11 Stator 12 Stator iron core 12a Annular part 12b Salient pole 13 Boss part 13a Tip small diameter part 14 Rotation stop protrusion 15 Rotor rotation stop groove 16 Falling prevention protrusion 17 Screw Hole 18 Bolt 19 Rotor 20 Shaft Coupling 20a Shaft Abutment Surface 21 Inductor 22 Iron Core 23 Pulse Generator Coil 24 Stator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshimi Hashimoto 3744 Ooka, Numazu City, Shizuoka Prefecture

Claims (9)

[Claims] 1. A shaft connecting portion to be fastened to a rotary shaft is formed in a plate shape, and one surface of the shaft connecting portion is brought into contact with a rotor positioning surface provided on the rotary shaft side. On the shaft abutment surface, a rotation stopping projection for fitting into the rotor rotation stopping groove provided on the rotor positioning surface of the rotary shaft is projected from the shaft abutment surface. A rotor for a rotating electric machine, wherein the rotor is provided. 2. A shaft connecting portion to be fastened to the rotary shaft is formed in a plate shape, and one surface of the shaft connecting portion is brought into contact with a rotor positioning surface provided on the rotary shaft side. The shaft abutment surface has a rotation preventing projection for fitting into a rotor rotation preventing groove provided on the rotor positioning surface of the rotating shaft, and a rotor positioning surface of the rotating shaft. A rotor for a rotary electric machine, comprising: a fall prevention protrusion for contacting an outer periphery of a portion provided with the protrusion and a protrusion for protruding from the shaft contact surface. 3. The shaft coupling portion has a tip portion provided in a state of protruding from the center of a rotor positioning surface of the rotary shaft or a mounting for penetrating a bolt for fastening the shaft coupling portion to the rotary shaft. The rotor for a rotary electric machine according to claim 1 or 2, further comprising a hole, wherein the rotation preventing protrusion is provided so as not to project into the mounting hole of the shaft coupling portion. 4. The rotor for a rotary electric machine according to claim 1, wherein the rotation preventing projection is formed by cutting and raising a part of the shaft coupling portion. 5. The rotor for a rotary electric machine according to claim 1, wherein the anti-rotation projection is formed by punching out a part of the shaft coupling portion. 6. A plurality of the tilt-preventing protrusions are provided on the shaft coupling portion at intervals in the circumferential direction of the outer periphery of the portion of the rotary shaft where the rotor positioning surface is provided. The rotor for a rotary electric machine according to claim 2, 3, 4 or 5. 7. The fall prevention projection is provided on the shaft coupling portion in an arc shape in a circumferential direction of an outer periphery of a portion of the rotary shaft where the rotor positioning surface is provided. , 3, 4 or 5 rotor for a rotating electric machine. 8. The rotating electric machine according to claim 2, wherein the fall prevention protrusion is formed by cutting and raising a part of the shaft coupling portion. For rotor. 9. The rotary electric machine according to claim 2, wherein the fall prevention projection is formed by punching out a part of the shaft coupling portion. Rotor.