JPS6032432B2 - AC generator bearing protection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bearing protection device for an alternating current generator, and in particular to a bearing having a structure suitable for protecting a rotating shaft bearing from dust and completely fixing a current collector ring and an output line. Regarding protective devices.

Traditionally, great care has been taken to protect the rotating shaft bearings of alternators used in dusty locations, such as internal combustion engines, or outdoors, and various structures have been proposed. has been done.

(For example, Japanese Patent Application Laid-Open No. 52-41813) However, if the alternator is used indoors or if the alternator itself has a sealed structure, a bearing protection device for dustproofing is not required. However, conventional bearing protection devices require design changes to the alternator itself depending on whether it is necessary or not.
Since no consideration was given to the fixing of the outgoing wires, and the focus was solely on dustproofing the bearings, there were various problems. The present invention has been made in view of the above, and an object of the present invention is to provide a bearing protection device for an alternating current generator, which can be installed as needed, and which also serves as dustproofing and fixing of the lead wire of the bag electric ring. Our goal is to provide the following.

A feature of the present invention is that a bearing protection device is constructed using a dustproof cover that is provided as a separate body between the current collector ring and the magnetic pole, and that serves both to protect the bearing from dust and to fix the current collector ring lead wire. That's what I did.

The present invention will be explained in detail below using the embodiments shown in FIGS. 1 to 6.

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the current collecting ring of an alternator to which the bearing protection device of the present invention is installed, and FIG. 2 is a side view of FIG. , reference numerals 1 and 2 are current collecting rings made of a conductor, to which are connected current collecting ring lead wires 4 and 5 connected to the Kaiji coil, and current collecting rings 1 and 2 are connected to an insulating tube 3. Fixed.

6 is an insulator that insulates the current collecting ring 1 and the lead wire 6;
is a protrusion provided on the insulating cylinder 3 for attaching a dustproof cover if necessary.

FIG. 3 is a longitudinal sectional view showing one embodiment of the dustproof cover constituting the bearing protection device of the present invention, and FIG. 4 is a side view of FIG. 3.
In FIGS. 3 and 4, the dustproof collar 8 is composed of a cylindrical seal part 9 that protects the bearing and a plate-shaped fixing part 10 that fixes the outgoing wire of the cylindrical seal part 9. Cuts 11 and 12 are provided for the lead wires, and the plate-shaped fixing portion 10' is provided with fixing holes 13 and 14 for fixing the lead wires and the dustproof cover 8 in the insulating cylinder 3 of FIG. Attachment holes 15 are provided for attachment using the respective protrusions 7. FIG. 5 is a longitudinal cross-sectional view showing an example of a Kaiji rotary alternating current generator equipped with a dustproof cover according to the present invention as a bearing protection device, and FIG. 6 is a perspective view of the main part of FIG. 5.

The magnetic poles 16a and 16b are claw-shaped magnetic poles, and the field core 1 is placed between them.
7, and the Kaiji coil 1 is wound through the bobbin 19.
It is excited at 8. The field current flowing through the field coil 18 is generated when the field coil 18 and the current collector rings 1 and 2 are connected to the current collector outlet wire 4.
, 5, and are supplied from current collecting rings 1 and 2.
Note that the lead wire 4 passes through the lead wire notch 11 and fixing hole 13 provided in the dustproof cover 8, which is attached so as to be in close contact between the insulating tube 3 and the magnetic pole 16, with the rotating shaft 20 as the center. , the bobbin protrusion 21 and the plate-shaped fixing part 1 of the dustproof cover 8
0 and is connected to the field coil 18 through a coupling plate 22 by crimping. The field coil 18 and the tips of the lead wire 4 are inserted into the groove 23 provided in the bobbin protrusion 21, and the field coil 18 and the lead wire 4 are held securely. The same applies to the current collector ring lead wire 5.
Also, the knurling of the rotating shaft 20 allows the magnetic poles 16a, 16
b. The field core 17 and the insulating cylinder 3 are fixed in close contact with each other in the vertical direction, and the bearing 24 is attached to the bracket 25 so that the inner rings of the rotating shaft two-way bearing 24 are joined. The bracket 25 is integrated with an annular brim-shaped bracket protrusion 26 for protecting the bearing 23 from dust, and a dustproof cover 8 is attached to the outer periphery of the bracket protrusion 26.
The inner periphery of the cylindrical seal part 9 is close to each other, and the bearing 24 is almost completely sealed and protected from dust. Since the bearing protection device of the present invention is configured as in the embodiment described above, it can be installed only when bearing protection is required. By installing this device, it is possible to not only protect the bearing 24 from dust, but also to securely hold the current collector lead wires 4, 5, and to maintain electrical insulation between the lead wires 4, 5 and the magnetic pole 16a. can be done reliably.

Furthermore, since the magnetic pole 16a, the dustproof cover 8, and the insulating tube 3 are in close contact with each other, the space conventionally provided between the insulating tube 3 and the magnetic pole 16a can be shortened.
This makes it possible to make AC generators smaller and lighter. As described above, the present invention has the remarkable effect that it can be mounted as needed, and that the bearing can be dust-proofed and the current collecting ring □ output wire can be securely fixed.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the collector ring of an alternator to which the bearing protection device of the present invention is installed, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a bearing of the present invention. FIG. 4 is a side view of FIG. 3, and FIG. 5 is a field rotation type AC equipped with the dust-proof cover of the present invention as a bearing protection device. FIG. 6 is a vertical sectional view showing an example of the generator, and FIG. 6 is a perspective view of the main part of FIG. 5. DESCRIPTION OF SYMBOLS 1, 2... Current collector ring, 3... Insulating cylinder, 4, 5... Current collector ring lead wire, 7... Protrusion, 8... Dust-proof cover, 9...
...Cylindrical seal part, 10...Plate-shaped fixing part, 11,1
2... Notch for lead wire, 13, 14... Lead wire fixing hole,
15...Mounting hole, 16a, 16b...Magnetic pole, 20...
Rotating shaft, 24... bearing, 25... bracket, 26
...bracket protrusion. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. In a field rotating alternating current generator, a coil lead line is fixedly placed on one side of the rotating magnetic pole through the rotating shaft, has a height at least equal to or higher than the field coil lead part, and has a coil lead wire held there. A dustproof cover consisting of a plate-shaped fixing part formed with a fixed part and a cylindrical shield part arranged integrally and concentrically with the plate-shaped fixing part is sandwiched between the insulating cylinders holding the magnetic pole and the current collecting ring. They are arranged and fixed concentrically, the current collector ring lead wire is held at the fixed part, and the cylindrical shield part is aligned in the circumferential direction with the cylindrical bracket projection part formed integrally with the bracket that constitutes the generator cover. A bearing protection device for an alternator, characterized in that the bearings are opposed to each other with a small gap.