KR950001727Y1 - Oilless bearing housing having air-hole - Google Patents

Abstract

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Description

Housing of oilless bearing with ventilation structure

1 is a cross-sectional view of an installation state of a conventional oilless bearing.

2 is a schematic perspective view of a motor housing to which an oilless bearing having a ventilation structure according to the present invention is mounted.

3 is a perspective view of main parts of FIG. 2;

* Explanation of symbols for main parts of the drawings

1: bearing housing 2: bearing mounting portion

3: board push 4: oilless bearing

5: bearing insertion part 6: locking jaw

7: ventilation hole

The present invention relates to a housing of an oilless bearing having a ventilation structure for releasing heat to the outside of the oilless bearing part according to the high speed rotation of the commutator motor, and more specifically, a board push to fix and support the oilless bearing. By installing a plurality of locking jaws at the inner periphery of the bearing insert of the (Board Push) and laying a plurality of ventilation holes at the periphery of the housing outside the bearing, heat of the oilless bearing part according to the high speed operation of the motor is provided through the ventilation holes. The present invention relates to a housing of an oilless bearing having a ventilation structure capable of easily discharging to the outside and extending the life of the motor due to cooling of the oilless bearing.

In general, in the case of quiet operation while requiring low noise, the ball bearing is assembled in the motor housing die-cast with aluminum to improve the quality, but the processing precision of the part where the bearing is installed must be very high. There is a disadvantage in that the productivity is reduced due to the difficulty in processing, in particular, because the price of the ball bearing itself is expensive, there is a problem that the material cost is increased.

Therefore, conventionally, in order to solve the above problems, a commutator motor having a structure using an oilless bearing instead of a bowl bearing has been developed.

That is, in the structure of the conventional oilless bearing used in the commutator motor, as shown in FIG. 1, the board push 23 which fixes the bearing on the bearing mounting portion 22 formed in the center of the housing 21 is provided. It is installed to be round, and the plate cover 25 is installed to prevent the flow of the bearing through the oilless bearing 24, and the cover 26 is completely coupled to the housing 21 by cocking or riveting to the outside. On the other hand, the upper and lower sides of the oilless bearing 24 is made of a configuration in which the bearing shaft 27 is spoken.

In the oilless bearing fixing structure having such a structure, a separate plate cover 25 is installed above the board push 23 supporting the oilless bearing 24 so as to maintain the center of the bearing, and then cover again. By attaching (26) to the housing 21, the work process is increased by installing a separate component according to fixing and maintaining the center of the oilless bearing 24, the workability is deteriorated accordingly It is.

In addition, in the structure of the oilless bearing 24 having the above structure, heat is generated in the oilless bearing part according to the high speed operation of the motor, and the heat generated at this time is not released to the outside and remains inside, thereby preventing heat generation. There was a problem in that the wear of the bearing and thus shorten the life of the motor.

The present invention has been made in order to improve the conventional problems as described above, the purpose is to install a plurality of locking jaws by the inner periphery of the bearing insert of the board push (Board Push) for fixing and supporting the oilless bearing, By installing a plurality of ventilation holes at the periphery of the housing outside the bearing, the heat of the oilless bearing part according to the high speed operation of the motor can be easily released to the outside through the ventilation hole, as well as the cooling of the oilless bearing. An object of the present invention is to provide a housing of an oilless bearing having a ventilation structure capable of extending its life.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic perspective view of a motor housing part to which an oilless bearing having a ventilation structure according to the present invention is mounted, and FIG. 3 is a main perspective view of FIG. 2, in which a board in a bearing mounting portion 2 formed at the center of the bearing housing 1 is shown. In the housing of the oilless bearing in which the push 3 is installed and the oilless bearing 4 is mounted, a plurality of catching jaws 6 protrude from the inner periphery of the bearing insert 5 of the board push 3. As well as being installed, a plurality of ventilation holes 7 are installed in the periphery of the bearing housing 1 at the outer side of the bearing.

In the drawings, reference numeral 8 denotes a brush, and 9 denotes a brush holder.

Referring to the operation and effects of the present invention made of such a structure as follows.

That is, as shown in Figs. 2 to 3, a plurality of locking jaws (6) by the inner periphery of the bearing insertion portion (5) of the board push (3) in which the oilless bearing (4) is inserted and fixed Protrudingly installed to press the upper portion of the oilless bearing (4) to maintain the center while preventing the upper and lower flow of the bearing.

In particular, when heat is generated in the bearing inserting portion 5 of the board push 3 in which the oilless bearing 4 is fixed according to the high speed rotation of the motor, a cover (not shown) is provided above the bearing housing 1 outside the board push 3. Is installed, the ventilation hole 7 is installed at the periphery of the bearing housing 1 to dissipate heat to the outside, and to cool the oilless bearing inside.

The ventilation hole 7 is formed in a rhombic shape, as shown in FIG. 3, and the reason is attributable to facilitating the external discharge of heat while sufficiently reinforcing the outer circumferential strength of the bearing housing 1.

As described above, according to the housing of the oilless bearing having a ventilation structure according to the present invention, a plurality of locking jaws are installed at the inner periphery of the bearing insertion portion of a board push that supports and supports the oilless bearing, By installing a plurality of ventilation holes at the periphery of the housing outside the bearing, heat of the oilless bearing part due to the high speed operation of the motor can be easily released to the outside through the ventilation hole, and the life of the motor due to the cooling of the oilless bearing. There is an excellent effect that can be extended.

Claims (2)

When the board push 3 is installed in the bearing mounting part 8 formed in the center of the bearing housing 1, in the housing of the oilless bearing in which the oilless bearing 4 is mounted, the bearing insertion of the board push 3 is inserted. Ventilation structure, characterized in that the locking jaw (6) is protrudingly installed on the inner periphery of the portion (5), as well as a plurality of ventilation holes (7) installed in the periphery of the bearing housing (1) outside the bearing Oilless bearing housing. 2. The housing of an oilless bearing having a ventilation structure according to claim 1, wherein the ventilation holes (7) which are perforated at the periphery of the bearing housing (1) have a rhombic shape.