JPH08126261A - Rotor of ac generator for vehicle - Google Patents

Abstract

PURPOSE: To prevent the breaking of a coil by lightening the influence of centrifugal force by rotation to the lead wire of a field coil. CONSTITUTION: A conductor connection 341 is insert-molded in a bobbin 34 where a field coil 33 is wound, and to this conductor connection 341 are one end of a connector terminal 7 as well as the lead wire 33a of the field coil connected, and also the other of this connector terminal 7 is connected to the conductor connection 351a of a collector 35.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor for an alternator used in a vehicle.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view showing a conventional vehicle alternator. In the figure, 1 is an alternator, 2 is a stator, 3 is a rotor, 4 is a commutator, 5 is a voltage regulator, 6a is a front bracket, and 6b is a rear housing the commutator 4 and the voltage regulator 5. Bracket, front bracket 6
a and the rear bracket 6b, the stator 2 and the rotor 3
I support. In addition, 31 is a rotating shaft and 61 and 62 are bearings.

Next, the operation will be described. The rotary shaft 31 is driven by a vehicle engine (not shown) so that both ends of the rotary shaft 31 are attached to the bracket 6.
By being supported and rotated by the bearings a and 6b and the bearings 61 and 62, a rotating magnetic field is generated. As a result, a current is induced in the stator 2, the induced current is rectified by the commutator 4, adjusted to a specified value by the voltage regulator 5, and output as an output voltage.

Next, FIG. 5 is a sectional view of the main part of the rotor 3 (a).
And a side view (b). In FIG. 5, 31 is a rotating shaft, 3
Reference numerals 21 and 322 denote field iron cores, which have a plurality of magnetic pole claws on the outer peripheral portion and a cylindrical portion on the inner peripheral portion, and are fitted to the rotary shaft 31 so as to face each other so that the magnetic pole pawls are engaged with each other. A field coil 33 is wound around a bobbin (winding frame) 34, and has the field cores 321 and 32.
It is fixed integrally with 2. Reference numeral 35 denotes a current collector fixed on the rotating shaft 31, and an insulating base 353 such as a mold.
A conductor 351 and slip rings 352a and 352b are insert-molded therein. A lead wire 33a drawn from the field coil 33 is wound around the connection portion 351a of the upper end protruding portion of the conductor 351.
a is inserted in the insulating tube 36. Therefore, the current transmitted to the slip ring by the brush (not shown) flows through the lead wire 33a to the field coil 33,
It becomes a field current. Further, in FIG. 5 (b), reference numeral 353a is a hook integrally molded with the insulating base 353 so that the lead wire 33a is securely wound around the conductor connecting portion 351a.
Serves as a guide.

In the above-described structure, the rotor is assembled by winding the field coil 33 around the bobbin 34, winding the winding start and the winding end around the bobbin hook 34a, and connecting the lead wire 33a. After forming, peeling off the coating at the tip of the wire and performing preliminary soldering,
The insulating tube 36 is inserted to form a bobbin assembly. Then, the bobbin ASSY is combined with the field iron cores 321 and 322, and the bobbin ASSY is press-fitted and fixed to the rotary shaft 31. Then, on the hook 353a of the current collector 35 fixed to the rotating shaft 31,
The lead wire 33a is hooked, wound around the conductor connecting portion 351a, and soldered.

[0006]

In the rotor of the conventional vehicular AC generator as described above, after winding the field coil 33 around the bobbin 34, the bobbin hook portion 34a is formed at each of the winding start and the winding end. Wrapped around
After forming the lead wire 33a and assembling the rotor 3, hook the lead wire 33a on the hook 353a of the current collector 35,
The conductor connecting portion 351a was wound around and soldered. Therefore, the centrifugal force generated by the rotation of the rotor 3 is directly applied to the lead wire 33a that is wound for connection, which causes a coil break and loses the function as a generator. Further, since the lead wire 33a is a conductor having a positive potential, it has to be inserted into an insulating tube so as not to come into contact with the field iron cores 321, 322 and other conductors having a negative potential. It was difficult to reduce the cost.

The present invention has been made in order to solve the above-mentioned problems, and reduces the influence of centrifugal force due to rotation on the lead wire of the field coil with a simple structure to reduce the effect of the coil. The purpose is to prevent disconnection.

[0008]

A rotor for an automotive alternator according to claim 1 of the present invention comprises a conductor connecting portion insert-molded on a bobbin around which a field coil is wound and a conductor connecting portion of a current collector. It is connected using a connection terminal.

According to a third aspect of the present invention, in a rotor for an alternator for a vehicle, a conductor connecting portion formed by insert molding on a bobbin around which a field coil is wound is formed long, and the end portion is directly connected to a conductor of a current collector. It is designed to be connected to the connection part.

According to a fourth aspect of the present invention, there is provided a rotor for an alternator for a vehicle in which a long conductor conductor of a current collector is directly connected to a conductor connecting portion insert-molded on a bobbin around which a field coil is wound. It was done.

[0011]

In the rotor of the vehicular AC generator configured as described above, centrifugal force due to rotation acts on the connection terminal or the long conductor and acts to reduce the influence of the centrifugal force on the lead wire. .

[0012]

【Example】

Example 1. FIG. 1 is a sectional view (a) and a side view (b) of a main part of a rotor of an automotive alternator according to an embodiment of the present invention. In the figure, 31, 321, 322, 33, 33
a, 34, 351, 351a, 352a, 352b, 3
Reference numeral 53 is the same as the above-mentioned conventional device, and its explanation is omitted. Reference numeral 341 is a connecting portion which is made of a conductor such as copper and is integrally molded with the bobbin 34. 7 is a conductor 71 such as copper
And a connecting terminal composed of an insulating material 72 such as a mold for covering the same, and a component that can be easily configured on the manufacturing line.

After assembling the rotor 3, the rotor main portion of this embodiment is assembled by welding or soldering the lead wire 33a, the conductor connecting portion 341 of the bobbin 34, and the conductor 71 of the connecting terminal 7. Then, the other end of the conductor 71 and the conductor connecting portion 351a of the current collector 35 are connected by welding or soldering. Therefore, the lead wire 33a only needs to have a length corresponding to the connection with the conductor connecting portion 341 of the bobbin 34, is less susceptible to the centrifugal force due to rotation, and can maintain stability. Moreover, the step of inserting the insulating tube is not required, and the cost can be reduced. Further, in the case of welding connection, the steps of stripping the coating of the lead wire 33a and pre-soldering are not necessary, and the cost is reduced.

Example 2. In the first embodiment, the connection terminal 7
By using the conductor connecting portion 341 of the bobbin 34 and the current collector 35.
The conductor connecting portion 351a of the bobbin 34 is connected to the conductor connecting portion 351a of FIG.
An insulator 342 such as a mold is applied to this, and the other end of the conductor connecting portion 341 is directly connected to the conductor connecting portion 3 of the current collector 35.
The same effect can be obtained by connecting to 51a.

Example 3. Further, as another embodiment, FIG.
As shown in FIG. 5, the conductor 351 of the current collector 35 is formed to be extended so that the connecting portion 351a at the outer end thereof is directly connected to the conductor connecting portion 341 of the bobbin 34, and the elongated conductor 351 is insulated. Even if formed integrally with the base 353,
The same effect can be obtained. In this case, since the insulator of the slip ring can also be used, neither an insulating tube nor an insulator such as a mold is required.

[0016]

According to the first aspect of the present invention, the conductor connecting portion is insert-molded on the bobbin, and the connecting terminal for connecting the conductor of the bobbin and the conductor of the current collector is used. It is possible to reduce the influence of centrifugal force due to rotation on the lead wire, and prevent the coil from breaking.

According to the second aspect of the present invention, since the connection terminal is composed of a conductor and an insulator such as a mold, it can be manufactured in line, and the component can be manufactured at a low cost. Further, it is not necessary to insert an insulating tube as an insulator into the lead wire, and the process and cost can be greatly reduced.

In the third and fourth aspects of the invention, the conductor connecting portion is insert-molded on the bobbin, and the conductor connecting portion and the conductor of the current collector are directly connected.
The influence of centrifugal force due to rotation on the lead wire of the field coil can be reduced.

Further, by connecting the lead wire and the conductor by welding, a step for soldering the wire is unnecessary,
The cost can be reduced.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view (a) and a partial side view (b) showing a rotor of an automotive alternator according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a rotor of a vehicle AC generator according to a second embodiment of the present invention.

FIG. 3 is a partial sectional view showing a rotor of an automotive alternator according to a third embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a conventional vehicle AC generator.

FIG. 5 is a partial sectional view (a) and a partial side view (b) showing a rotor of a conventional vehicle alternator.

[Explanation of symbols]

1 AC generator, 3 rotors, 31 rotating shafts, 321,
322 field iron core, 33 field coil, 33a lead wire, 34 bobbin, 341 conductor connection part, 342 insulator, 35 current collector, 351 conductor, 351a conductor connection part, 7 connection terminal, 71 conductor, 72 insulator.

Claims (5)

[Claims] 1. A rotor provided with a field iron core fixed to a rotary shaft, a field coil wound around an outer periphery of the field iron core through a bobbin, and a current collector fixed to the rotary shaft. , A conductor connecting portion is formed by insert molding on the bobbin around which the field coil is wound and has an outer end protruding outward from the bobbin, and the protruding portion of the conductor connecting portion is connected together with the lead wire of the field coil. A rotor for an alternator for a vehicle, wherein one end of a terminal is connected, and the other end of the connection terminal is connected to a conductor connecting portion of the current collector. 2. The rotor for an automotive alternator according to claim 1, wherein the connection terminal is composed of a conductor and an insulator. 3. A rotor provided with a field iron core fixed to a rotary shaft, a field coil wound around an outer circumference of the field iron core via a bobbin, and a current collector fixed to the rotary shaft. A field-coil-wound bobbin is insert-molded, and an outer end of the bobbin is provided with a conductor connecting portion projecting outward from the bobbin, and the conductor connecting portion is formed to have a long outer end. A rotor for an alternator for a vehicle, which is directly connected to a conductor connecting portion, and an insulator is provided on an outer circumference of the elongated conductor connecting portion. 4. A rotor provided with a field iron core fixed to a rotary shaft, a field coil wound around a bobbin around the outer circumference of the field iron core, and a current collector fixed to the rotary shaft. The field coil is wound around a bobbin and provided with a conductor connecting portion having an outer end protruding outward from the bobbin, and the protruding portion of the conductor connecting portion is provided with the lead wire of the field coil. A rotor for an alternator for a vehicle, characterized in that a conductor connecting portion of a current collector is formed to be extended and its end portion is directly connected. 5. The rotor for a vehicle alternator according to claim 1, wherein the lead wire of the field coil and the conductor connecting portion are connected by welding.