JPS6029326Y2 - Rotating electric machine bearing device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a bearing device for a rotating electric machine.

FIG. 1 shows a conventionally known bearing device for this type of rotating electric machine.

In Figure 1, 1 is a rotating shaft, 2 is a bearing that supports this rotating shaft, 3 is a bracket that holds this bearing, 4 is a grease supply path provided on this bracket, and 6 is also provided on the bracket. A grease discharge port 6 is an inboard bearing cover attached to the bracket 4, and 7 is a grease removal ring fitted to the rotating shaft 1.

Also, the arrow → indicates the direction of grease passage.

Next, the conditions from grease supply to discharge will be explained.

First, as shown by the first arrow, the supplied grease passes through the grease supply path 4 of the bracket 3, passes through the bearing cover 6, and reaches the bearing 2.

The grease that has lubricated the bearing 2 is forcibly discharged from the grease discharge port 6 of the bracket 3 by the grease removal ring 7.

Since the conventional bearing device of a rotating electric machine is configured as described above, a moderate amount of grease is originally required in the bearing part, but the disadvantage is that even normal grease is discharged due to the discharge action of the grease extermination ring 7. was there.

This invention was made with the aim of eliminating the above-mentioned drawbacks, and provides a bearing device for a rotating electric machine that employs a ring and a stop plate.

An embodiment of this invention will be described below based on the drawings.

In FIG. 3, reference numeral 8 indicates a fixed outer cover attached to the shaft end side of the bracket 3, 9 indicates a movable outer cover fitted to the rotating shaft 1 with a minute gap between the inner periphery of the fixed outer cover 8, and 10 is attached to the inner circumferential wall of the movable outer cover 9, one piece is formed of a thin piece 10a so as to close the grease discharge side of the bearing 1, and an elastic body ring 11 is formed of a thin piece 10a that is open on the outer circumferential side. Body: A stop plate is provided on the grease discharge side of the bearing 2 so that the tip of the thin piece 10a of the ring 10 can come into contact with it; 12 is a finger formed on the inner peripheral wall of the movable outer cover 9; is discharged from the discharge port 5.

Note that the other configurations are the same as those of the prior art, so explanations will be omitted.

Next, the operation will be explained.

As shown by the arrow, the supplied grease passes through the grease supply path 4 of the bracket 3, passes through the bearing cover 6 on the inside of the machine, and reaches the bearing 2. However, the grease that tries to jump out of the bearing 2 passes through the stop plate 11, It is blocked by an elastic body V IJ song 0 attached to a movable outer cover 9 fitted to the rotating shaft 1, and the grease in the bearing 2 is prevented from being discharged to the outside as much as possible to improve the lubrication of the bearing 2. This is to ensure that it runs smoothly.

As described above, this device consists of an elastic body ■ a ring 10 and a stop plate 1.
1 allows as much grease as possible to remain in the bearing 2 to ensure smooth lubrication. At the same time, if too much grease is applied and the bearing becomes full, the elastic body V as shown in Figure 3
The thin piece lea of IJ song 0 rises up due to the pressure of the grease and comes out.

The grease that has come out is then discharged from the discharge port 5 by the fingers 12 of the movable outer cover 9.

In addition, the sealing effect between the fixed outer cover 8 and the movable outer cover 9 and the elastic ring 10 prevent dust from entering from the outside.
Intrusion can be prevented by the double effect of the sealing effect of the stop plate 11.

As described above, this invention has the effect of efficiently lubricating the bearing without waste.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional bearing device for a rotating electrical machine, Fig. 2 is a sectional view of a bearing device according to an embodiment of this invention, and Fig. 3 is an enlarged view of the elastic body V'Jing portion shown in Fig. 2. FIG. In the figure, 1 is the rotating shaft, 2 is the bearing, 3 is the bracket, 4 is the oil supply path, 5 is the grease outlet, 6 is the inside bearing cover, 7
1 is a grease removal ring, 8 is a fixed outer cover, 9 is a movable outer cover, 10 is an elastic ring, 10a is a thin piece, 11
is a stop plate, and 12 is a finger. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A bearing that supports a rotating shaft, a bracket to which this bearing is attached, and which is provided with an oil supply path for supplying lubricating grease to the bearing and a discharge port for discharging the grease after lubrication, and a bracket that is attached to this bracket and has an inner surface thereof. A bearing device for a rotating electric machine having an inside bearing cover configured to allow oil to be supplied to the bearing from an oil supply path of the bracket through a space, the fixed outer cover being attached to the shaft end side of the bracket; a movable outer cover fitted to the rotating shaft with a small gap between the inner periphery of the fixed outer cover, a stop plate provided on the grease discharge side of the bearing, and a stop plate attached to the inner circumferential wall of the movable outer cover. , cut out a piece of thin wall so as to block the grease discharge side of the bearing,
It is equipped with an elastic body (1) ring which is opened on the outer circumferential side and whose tip is configured to come into contact with the above-mentioned stop plate. A bearing device for a rotating electrical machine, characterized in that when the amount of grease exceeds a predetermined amount, a thin piece of the V-ring is pressed by the grease and deforms, so that the grease can be discharged.