JPH0516851Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a rotor of a magnet generator, and in particular,
Related to improvements in the coupling structure between a rotor and a rotating shaft, such as a structure that is effective for use in manufacturing rotors in magnet generators used in small vehicles such as motorcycles, outboard motors, portable generators, etc. .

[Conventional technology]

In general, a magnet generator consists of a rotor with a plurality of magnets arranged at equal intervals on the inner peripheral surface of a roughly bowl-shaped yoke, and a plurality of coil units arranged at equal intervals inside the yoke of the rotor. Some engine engines are equipped with a generator, which is fixed to the outer shell of the engine, and a rotor is fitted onto the rotating shaft of the engine.

In such a magnet generator, the rotor is linked to the engine by fixing a boss member concentrically connected to the bottom wall of the yoke to the rotating shaft. A structure shown in FIG. 6 is conventionally known as a structure in which a boss member is concentrically coupled to the bottom wall of a yoke.

In FIG. 6, a boss member 1, which has a flange 2 on the outer periphery of one end and is fitted onto a rotating shaft, is inserted from the outside into an opening 4 formed in a yoke bottom wall 3, and is joined with an inro. The flange 2 and the yoke bottom wall 3 are fastened together by rivets 5. In this magnet generator, the part of the boss member 1 that is fitted onto the rotating shaft that is connected to the inro and the part that contacts the yoke bottom wall 3 are processed simultaneously when the boss member 1 is processed individually, and the parts that are opened in the yoke bottom wall 3 are The boss member 1 is press-fitted or fitted into the opening 4, and then the flange 2 and the yoke bottom wall 3 are connected with a plurality of rivets 5, thereby maintaining the axial accuracy of the rotor. A crankshaft as a rotating shaft is fitted into the rotating shaft insertion hole 8 of the boss member 1, and is tightened and fixed by a rotor set bolt inserted into an insertion groove 9 communicating with the insertion hole 8. It's summery.

In this case, if you directly tighten the rotor set bolt and crankshaft, it will be affected by the condition of the tightening seat surface of the boss member 1, such as the material, hardness, burrs in the insertion groove 9, etc., and it will not be possible to firmly tighten the rotor set bolt. Can not. For this reason, the rotor set bolt is subjected to heat treatment and the insertion groove 9 is deburred, so that the rotor set bolt can be firmly tightened in a stable state.

However, even with this method, sufficient tightening cannot be ensured, so a washer is inserted into the insertion groove 9 and the rotor set bolt is tightened together with the washer. In this case, a thick washer is used to ensure strength.

[Problem that the invention attempts to solve]

However, in a configuration in which the rotor set bolt is tightened to the crankshaft using a washer, it is necessary to incorporate the washer into the rotor set bolt when tightening the rotor set bolt. It may fall off.

An object of the present invention is to provide a rotor for a magnet generator in which a fastening member can be fastened to a rotating shaft via a washer without assembling a washer to the fastening member.

[Means for solving problems]

The rotor of the magnet generator according to the present invention has a flange on the outer periphery of one end, and a fastening member is inserted into the flange side wall surface of the boss member that is fitted to the rotating shaft and communicates with the rotating shaft insertion hole of the boss member. Grooves are formed concentrically, and a portion of this boss member is inserted into an opening made in the bottom wall of the approximately bowl-shaped yoke, and the flange of the boss member and the bottom wall of the yoke are fixed with rivets. In the rotor of the magnet generator, a plurality of protrusions are formed on the top side edge of the fastening member insertion groove, protruding along the axial direction of the rotating shaft,
A substantially cylindrical washer with a substantially U-shaped cross section is inserted into this fastening member insertion groove, and the opening of this washer is supported by the bent portion of each projection toward the bottom side of the fastening member insertion groove. It is characterized by the presence of

[Effect]

When a washer with a substantially U-shaped cross section is inserted into the fastening member insertion groove and each protrusion of the fastening member insertion groove is bent toward the bottom side of the fastening member insertion groove, the protrusion and the end surface of the washer on the opening side will come into contact with each other. This contact causes the washer to be supported within the fastening member insertion groove. Thereby, the fastening member can be firmly fastened to the rotating shaft via the washer without assembling the washer to the fastening member.

〔Example〕

Fig. 1 is a longitudinal cross-sectional view showing the rotor of a magnet generator that is an embodiment of the present invention, Fig. 2 is an explanatory diagram of the assembly of the washer, and Fig. 3 is a longitudinal cross-sectional view showing the state in which the washer is assembled to the rotating shaft. The plan view, FIGS. 4 and 5 are longitudinal sectional views showing other embodiments of the washer.

In this embodiment, the rotor 10 includes a boss member 11 into which a crankshaft serving as a rotating shaft is fitted, and this boss member 11 has a flange 12 formed in a circular ring shape on the outer periphery of one end thereof. It is formed into a cylindrical shape. A tapered rotary shaft insertion hole 13 is formed in the cylindrical hollow part of this boss member 11, and a bolt insertion groove 14 communicating with the rotary shaft insertion hole 13 is formed in the side wall surface of the flange 12 of the cylindrical hollow part. has been done. A plurality of protrusions 15 are formed on the top edge of the bolt insertion groove 14 and protrude along the axial direction of the crankshaft. A washer 16 having a substantially U-shaped cross section is inserted into the bolt insertion groove 14. After the washer 16 is inserted into the bolt insertion groove 14, a curling process is performed to bend each protrusion 15 toward the bottom of the bolt insertion groove 14, so that the end of each protrusion 15 and the opening of the washer 16 are The side top end portions abut, and this abutment supports the washer 16 within the bolt insertion groove 14. The outer periphery of the boss member 11 has a large diameter portion 17 on the flange 12 side and a small diameter portion 18 on the opposite side. Flange 12
A plurality of rivet holes 12a are provided at appropriate intervals in the circumferential direction.

Further, the rotor 10 includes a yoke 19 formed in a substantially perfect round bowl shape, and a bottom wall 20 of the yoke 19
An opening 21 is arranged concentrically in the boss member 11.
The inner diameter is such that it can be inserted at an appropriate distance from the large diameter portion 17 of the main body. A plurality of rivet holes 20a are formed in the yoke bottom wall 20 so as to be aligned with the rivet holes 12a formed in the flange 12 of the boss member 11 on the outside of the opening 21. Further, a stepped portion 22 is disposed on the yoke bottom wall 20 so as to surround the opening 21, and is bulged on the yoke opening surface side in the axial direction.

The boss member 11 according to the above configuration is inserted into the yoke 19 from the outer surface side of the bottom wall 20 into the opening 21 until the flange 12 comes into contact with the bottom wall 20,
The large diameter portion 17 of the boss member 11 is aligned with the opening 21 in the yoke bottom wall 20.

In this state, a plurality of rivet holes 20a, 12a formed in the bottom wall 20 of the yoke 19 and the flange 12 of the boss member 11 are aligned with each other, and the rivets 23 are inserted into these rivet holes.
After being press-fitted or fitted, the flange 12 and the yoke bottom wall 20 are caulked, and the rivets 23 join the flange 12 and the yoke bottom wall 20 together.

In FIG. 3, reference numeral 24 denotes a plurality of magnets arranged at predetermined positions on the inner peripheral surface of the side wall of the yoke 19. After being housed in a synthetic resin case 25 and press-fitted into the yoke 11, they are rolled and swaged. It is positioned and fixed by appropriate means such as forming a section. 2
6 is a generator; 27 is a coil unit constituting the generator 26;

Next, the action will be explained.

First, before the rotor set bolt is fastened to the crankshaft, the washer 16, which has been individually heat treated, is inserted into the bolt insertion groove 14.
Subsequently, each protrusion 15 is curled and caulked, and the washer 16 is inserted into the bolt insertion groove 14 by abutment between each protrusion 15 and the washer 16. Thereafter, as shown in FIG. 3, the rotor set bolt 29 is fastened to the crankshaft 28 fitted into the rotating shaft insertion hole 13.

In this case, since the washer 16 is inserted into the bolt insertion groove 14, the rotor set bolt 29
The rotor set bolt 29 can be fastened to the crankshaft 28 without assembling the washer 16. Furthermore, the washer 16 has each protrusion 15
Since the rotor set bolt 29 is supported by the rotor set bolt 29, the rotor set bolt 29 can be fastened without the washer 16 falling out of the bolt insertion groove 14. Furthermore, when inserting the washer 16 into the bolt insertion groove 14, the shape of the washer 16 restricts the insertion direction of the washer 16, and the insertion direction is clear, so there is a risk of the washer 16 being inserted in the opposite direction. There will be less sex.

Since it is sufficient to heat-treat the washer 16 independently to obtain a predetermined hardness, the entire boss member 11 can be heat-treated and hardened to perform post-processing (taper finishing, etc.)
This also eliminates the possibility of deteriorating the structure of the system.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and may be modified without departing from the gist thereof.
It goes without saying that various changes can be made.

For example, if the washer 16 has a substantially U-shaped cross-section, as shown in FIGS. It is also possible to configure it by combining a pair of members with 16d. In addition, the fourth
In the case of the washer 16 shown in the figure, the joining surface between the flat plate 16a and the cylinder 16c is an inclined surface, and by abutting against this slope, it is possible to prevent the flat plate 16a from coming off toward the cylinder 16c. can.

The protrusions are not limited to being arranged partially, but may be arranged in a series of annular shapes, and the processing for bending the protrusions is not limited to curling, but can also be done by spinning, knitting, etc. It is also possible to use the following means.

[Effect of idea]

As explained above, according to the present invention, it is not necessary to assemble the washer to the fastening member during bolt fastening work, and it is possible to prevent the washer from falling off from the fastening member insertion groove. It is possible to improve the workability of fastening to the rotating shaft.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing the rotor of a magnet generator that is an embodiment of the present invention, Fig. 2 is an explanatory diagram of the assembly of the washer, and Fig. 3 is a longitudinal cross-sectional view showing the state in which the washer is assembled to the rotating shaft. The plan view, FIGS. 4 and 5 are longitudinal sectional views showing other embodiments of the washer. FIG. 6 is a longitudinal sectional view showing a conventional example. 10...Rotor, 11...Boss member, 12...
Flange, 13...Rotary shaft insertion hole, 14...Bolt insertion groove, 15...Protrusion, 16...Washer, 1
9... Yoke, 20... Bottom wall, 23... Rivet, 28... Crankshaft, 29... Rotor set bolt.

Claims (1)

[Claims for Utility Model Registration] (1) A fastening member insertion groove that communicates with the rotation shaft insertion hole of the boss member on the flange side wall surface of the boss member that has a flange on the outer periphery of one end and is fitted onto the rotation shaft. are formed concentrically, and a portion of this boss member is inserted into an opening made in the bottom wall of the approximately bowl-shaped yoke, and the flange of the boss member and the bottom wall of the yoke are fixed with rivets. In the rotor of a magnet generator, a plurality of protrusions protruding along the axial direction of the rotating shaft are formed on the top edge of the fastening member insertion groove, and a cross section of approximately A magnet generator characterized in that a U-shaped and substantially cylindrical washer is inserted, and the opening of the washer is supported by the bent portion of each of the protrusions toward the bottom surface of the fastening member insertion groove. rotor. (2) A rotor for a magnet generator according to claim 1, wherein the washer is configured in a shape that combines a substantially disc-shaped flat plate and a substantially cylindrical cylinder. .