JPS6317919Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a bearing device for a motor or the like that is mounted downward.

Configuration of Conventional Example and Problems Therebelow, a conventional bearing device will be explained with reference to FIG.

In a conventional bearing device of this type, an oil-impregnated bearing 103 is fixed to a bearing support portion 102 of a housing 101, and a felt 10 impregnated with oil is placed around the bearing 103.
4 was provided, and a washer 106 was provided on a portion of the shaft 5 press-fitted into the bearing 103 that faces the bearing outside the housing.

The operation of the bearing device configured as described above will be described below. When the motor is operated, the bearing 103 generates heat, and the oil inside the bearing 103 is
It flows out onto the end face of the bearing 103 and the surface of the shaft 105 as shown in the direction a'→a''.Next, as the oil in the bearing 103 decreases, the oil in the felt 106 flows into the bearing 103 as shown in the direction a→a'. By repeating these operations, the oil in the bearing 103 flows out of the motor, causing oil depletion, resulting in abnormal heat generation, abnormal wear, and seizure.

Purpose of the invention The present invention is intended to eliminate such conventional drawbacks, and aims to eliminate oil leakage to the outside of the motor, etc., and prevent seizure of the bearing portion.

Structure of the invention In order to achieve the above-mentioned object, the present invention provides a cap-shaped oil recovery section on the outside of the housing, and a flocked body that comes into contact with an oil-impregnated material such as felt provided inside the housing is provided inside this oil recovery section. . and,
An opening slightly larger than the shaft diameter is provided in the center of the oil recovery section, and an oil washer slightly larger than the inner diameter of the opening is press-fitted onto the shaft between the opening and the bearing. With this configuration, the oil inside the motor circulates from the bearing to the oil washer to the inside of the oil recovery section to the flocked body to the oil-impregnated material to the bearing, and there is no leakage to the outside of the motor, eliminating the seizure problem. be.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

In the figure, 1 is a housing, and a bearing 3 is fixed by a bearing holding part 2. A plurality of holes 4 are provided on the outer periphery of the bearing holding portion 2 in the housing 1, and a cap-shaped oil recovery portion 5 that covers the bearing 3 is provided on the outside of the housing 1. An opening 6 that is slightly larger than the diameter of the motor shaft 7 is formed in the center of the oil recovery section 5, and a rising portion toward the bearing holding section 2 is provided at the edge of the opening 6. . On the outer periphery of the bearing 3 in the housing 1, a ring-shaped felt 8 soaked in oil is provided. A flocked body 9 is provided on the inner bottom of the oil recovery section, and this flocked body 9 abuts on the felt 8 through the plurality of holes 4. An oil washer 10 is press-fitted into the motor shaft 7, and the outer circumference is slightly larger than the inner diameter of the opening 6, and the outer circumference is inclined downward.
0 is located between the bearing holding part 2 and the opening part 6. Note that the oil drain washer 10 is press-fitted by being deformed so as to pass through the oil drain washer 10 and the opening 6, and then being returned to its original shape inside the oil recovery section 5.

In the above configuration, when the motor is operated, the bearing 3 generates heat, and the oil inside the bearing 3 flows from A' to A''.
Even if it spills onto the end face or the surface of the shaft 7, the oil washer 10
The oil is guided to the oil collecting section 6 and collected therein. Next, this accumulated oil is sucked up by the flocked body 9 provided in this oil recovery section 6 in a direction from A'' to A due to capillary action, and is collected into the felt 8. Also, the motor stops. When the rotation of the oil washer 10 stops, the oil flowing out from the bearing 3 drips downward from the outer periphery of the oil washer 10.
Since the opening 6 is slightly larger than the opening 6 of the
The information will be reliably caught and will not leak outside. In this way, the oil in the bearing 3 circulates in the order of bearing 3 → oil washer 10 → oil recovery part 6 → flocked body 9 → felt 8 → bearing 3, and is prevented from flowing out of the motor.

Effects of the Invention As is clear from the description of the above embodiments, according to the present invention, the oil flowing out from the bearing end face is caught by the oil washer and then collected in the oil recovery section, and the accumulated oil is transferred to the oil recovery section. Since the oil is sucked up by the flocked body installed in the oil-containing material and circulated to the bearing, oil does not leak out of the motor when the motor is running or stopped, which prevents abnormal heat generation and abnormal wear. This prevents the bearing from seizing and has the effect of extending the life of the bearing.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a bearing portion of a conventional motor, and FIG. 2 is a partial sectional view of the same device according to an embodiment of the present invention. 2... Bearing holding part, 3... Bearing, 4... Hole, 5
... Oil recovery department, 8 ... Felt, 9 ... Flocked body,
10... Oil cutter wash.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a structure in which the bearing is held in the bearing holding part of the housing, the shaft of the rotor is supported by the bearing, and an oil-impregnated material is arranged around the bearing in the housing, A hole is provided around the bearing holding portion of the housing, a cap-shaped oil recovery portion is provided outside the housing to cover the bearing portion, and a flocked body is provided inside the oil recovery portion to come into contact with the oil-containing material through the hole. An opening for the shaft to pass through is provided in the part, and the lip of the opening is raised toward the bearing, and an oil washer whose outer diameter is slightly larger than the inner diameter of the opening is attached to the shaft so as to be located between the bearing and the opening. A bearing device that is attached to. (2) The bearing device according to claim 1, wherein the outer peripheral portion of the oil washer is inclined downward.