JPH0223098Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to the rotor of a generator, and particularly involves winding a field coil around the rotor core via a bobbin and slipping the field coil. The present invention relates to a rotor for a generator, which is connected to an external circuit through a ring and brushes, and which supplies field current to the field coil from the external circuit.

〓Conventional technology〓 In a rotating field type generator, a field coil is wound around the iron core of the rotor, and this field coil is connected to an external circuit via a slip ring and a brush. The field current was supplied from the coil to the rotating field coil. It is therefore necessary to connect the slip ring to the end of the field coil by some means. Conventionally, the terminal of the slip ring was connected to the lead wire of a field coil inserted into a glass tube, and the glass tube was impregnated with varnish to provide an insulating coating. Furthermore, in order to more reliably hold the insulated lead wire portion, measures have been taken such as wrapping the lead wire portion around the rotating shaft at the base of the slip ring.

〓Problems to be solved by the invention〓 Therefore, according to the conventional rotor of such a generator, the connection work between the terminal of the slip ring and the end of the field coil becomes troublesome, and in some cases, it becomes difficult. There was a possibility that the terminal of the slip ring could be damaged.

The present invention has been developed in view of these problems, and it facilitates the connection between the terminal of the slip ring and the end of the field coil, and also ensures the protection of the terminal of the slip ring. The object of the present invention is to provide a rotor for a generator as described above.

〓Means and effects for solving the problems〓 The present invention involves winding a field coil around the iron core of the rotor via a bobbin, and connecting the field coil to an external circuit via a slip ring and a brush. In the generator, a sleeve is provided at one end of the bobbin in the axial direction and close to the slip ring, and a sleeve is provided at one end of the bobbin in the axial direction and close to the slip ring. The diameter of the sleeve is set to be slightly smaller than the diameter of the slip ring, a notch is formed at the end of the sleeve on the slip ring side, and the outer surface is biased toward the center in the radial direction than the outer surface of the sleeve. The invention relates to a rotor for a generator, characterized in that a terminal of the slip ring is inserted into the notch, and the terminal is connected to a lead wire of the field coil. This facilitates the connection between the terminal of the slip ring and the field coil, and the terminal of the slip ring is protected by the sleeve of the bobbin by receiving the terminal of the slip ring through the notch. This is what I did.

〓Example〓 The present invention will be described below with reference to an illustrated example.
FIG. 2 shows a rotor of a generator according to an embodiment of the present invention, and this rotor is equipped with a rotating shaft 1. As shown in FIG. A rotor core 2 is fixed to the rotating shaft 1 so that the rotating shaft 1 passes through it. The radially outer peripheral end of the iron core 2 of the rotor constitutes a magnetic pole 3. and rotor core 2
A bobbin 4 made of synthetic resin is attached to the bobbin 4. The bobbin 4 is divided into left and right halves in FIG. 2, and is mounted so as to cover the iron core 2 of the rotor from both ends of the rotating shaft 1 in the axial direction. A field coil 5 is wound around the upper side of the bobbin 4, thereby forming a rotor.

Next, a structure for connecting the end of the field coil 5 of the rotor to an external circuit will be described. A sleeve 6 is integrally connected to one end of the bobbin 4. A pair of notches 7 are formed in this sleeve 6 at positions 180 degrees apart in the circumferential direction. A holder 8 made of an insulating material is fixed to the end of the rotating shaft 1 so as to be close to the tip of the sleeve 6, and a pair of annular slip rings are mounted on the outer peripheral surface of the holder 8. 9 is installed. The outer diameter of the slip ring 9 on the holder 8 is slightly larger than the outer diameter of the sleeve 6. The terminal 10 of this slip ring 9 is inserted into the notch 7 of the sleeve 6. Note that terminal 1
The outer surface of the terminal 10 is located closer to the center in the radial direction than the outer surface of the bobbin 6.
When the terminal 10 is inserted into the notch 7, the surface of the terminal 10 is adapted to be recessed into the notch 7. The terminal 10 is connected to a lead wire 11 connected to the end of the field coil 5 by soldering.

In the above configuration, the field coil 5 of this generator is connected to an external circuit, a brush (not shown), a slip ring 9, a terminal 10, and a lead wire 11.
When a field current flows through this coil 5, the magnetic pole 3 is magnetized to a predetermined pole. As the rotor rotates, power generation output is generated in the armature coil disposed on the stator side.

The terminal 10 of the slip ring 9 is connected to the notch 7 of the sleeve 6 integrally connected to the bobbin 4.
Coil 5
The lead wire 11 can be directly connected to the terminal 10 by soldering, which greatly facilitates the connection work between the terminal 10 and the lead wire 11. Furthermore, the terminal 10 of the slip ring 9 is connected to the sleeve 6
Since the terminal 10 is disposed in the notch 7 of the terminal 10, the terminal 10 is protected, and the terminal 10 or the lead wire 11 can be protected.

Effects of the invention As described above, the present invention provides a sleeve at one end of the bobbin in the axial direction and close to the slip ring, and also makes the diameter of this sleeve slightly smaller than the diameter of the slip ring. , a notch is formed in the end of the sleeve on the slip ring side, and a terminal of the slip ring whose outer surface is biased toward the center in the radial direction than the outer surface of the sleeve is inserted into the notch, and the terminal is inserted into the notch. is connected to the lead wire of the field coil. Therefore, according to the present invention, the connection between the slip ring and the field coil is facilitated, and the terminal is protected by the sleeve of the bobbin by being received in the notch. Become so.

[Brief explanation of the drawing]

FIG. 1 is an enlarged perspective view of a main part of a rotor of a generator according to an embodiment of the present invention, and FIG. 2 is a partially cutaway front view of the rotor. In addition, in the symbols used in the drawings, 2...rotor core, 4...bobbin, 5...field coil, 6...
... sleeve, 7 ... notch, 9 ... slip ring, 10 ... terminal, 11 ... lead wire.

Claims (1)

[Scope of utility model registration request] A field coil is wound around the iron core of the rotor via a bobbin, and this field coil is connected to an external circuit via a slip ring and a brush, and a field current is transmitted from the external circuit to the field coil. In the generator, a sleeve is provided at one end of the bobbin in the axial direction and close to the slip ring, and the diameter of the sleeve is slightly smaller than the diameter of the slip ring, A notch is formed at the end of the sleeve on the slip ring side, and a terminal of the slip ring whose outer surface is biased toward the center in the radial direction than the outer surface of the sleeve is inserted into the notch, and the terminal is inserted into the notch. A rotor for a generator, characterized in that the rotor is connected to a lead wire of the field coil.