KR200325690Y1 - Sealing for bearing cover in the motor - Google Patents

Abstract

The present invention relates to a closed structure of the motor bearing cover, to facilitate the coking operation of the motor housing to be caulked operation to provide a sealed structure of the motor bearing cover that can be prevented leakage by eliminating the sealing paint process, the motor housing The caulking molding consists of a horizontal stepped portion in which a bearing cover is settled inside, a caulking molded portion formed to protrude upward between the stepped portion and the cover outer wall of the housing, and a molding gap formed between the caulking molded portion and the cover outer wall of the housing. The addition provides a closed structure of the motor bearing cover that is caulked throughout the upper circumference of the bearing cover. As a result, the bearing and the bearing holder are stably installed by the appropriate external force inside the housing where the bearing is installed, and the bearing cover completely seals the inside of the housing to prevent leakage of oil from the inside of the motor in which the oil is embedded, thus eliminating an additional process. The production process of the motor is simplified and the life of the motor is extended.

Description

SEALING FOR BEARING COVER IN THE MOTOR}

The present invention relates to a closed structure of the motor bearing cover, and more particularly, to improve the seating portion of the bearing cover caulking when assembling the bearing holder of the sealed C-fan motor and the bearing cover to prevent leakage of bearing oil and to simplify the process. It relates to a sealed structure of the motor bearing cover that can achieve this.

Currently, various types of motors are used according to the functions employed in the refrigerators, for example, motors used in compressors and small fan motors for cold air circulation.

Among the refrigerator motors, the small fan motor is designed to have a low noise and a small size, so that the fan motor should be able to sufficiently exhibit the performance of fan rotation while being simpler than a general motor structure.

The structure for such a compact fan motor is shown schematically in FIG.

In FIG. 1, the housing 100 of the motor is provided with a flange 102 and an installation hole 104 for installing the motor on its exterior.

Inside the housing 100, a bearing 110, a bearing holder 120, and a bearing cover 130 are assembled in this order, and the center of each of the parts 110, 120, and 130 is a shaft of the motor (not shown). Penetratingly formed to be built.

The bearing 110 is installed to reduce the friction while supporting the rotation of the shaft, the bearing holder 120 is the bearing (120) to realize a minimum rolling contact for the support of the bearing 110 for reducing the friction of the shaft One side of 110 is elastically supported.

As described above, the bearing 110 is supported by the bearing holder 120, and in order to fix the bearing cover 130, the bearing cover 130 compresses and fixes the outer circumferential surface of the bearing 110.

In order to describe the fixing structure of the bearing cover 130 and the bearing holder 120 in more detail refer to FIG.

In FIG. 2, the stepped portion 140 for forming the bearing cover 130 at a predetermined position on the inner surface of the housing 100 of the motor is formed. Thus, after the bearing 110 and the bearing holder 120 are installed inwardly of the housing 100, the bearing cover 130 covers the upper surface of the bearing holder 120, and thus, on the stepped portion 140 of the housing 100. It is enshrined. At this time, the bearing holder 120 is somewhat pressed by the bearing cover 130.

In order to fix the assembled bearing cover 130 as described above, a caulking process is performed on a part of the stepped portion 140 of the housing 100, and then a seal paint process is applied. This is to prevent leakage of oil filled in the housing 100 while caulking while supporting the bearing holder 120 and the bearing 110 after the bearing cover 130 is assembled.

However, during the caulking process, the stepped portion of the housing 100 is spaced at a predetermined interval of 60 degrees, and the coking is compressed at six places, and only a portion of the housing 100 needs to be subjected to an accurate external force to execute the caulking process. Except for the possibility of leakage, there is still a possibility that the detailed work must be done due to the sealing paint process, there was a difficult problem of the processing maneuver of the motor.

The present invention was devised to solve the above problems, the object of the present invention is to improve the stepped portion of the motor housing to be caulking work to prevent leakage, but the coking operation is easy to seal the paint process To provide a sealed structure of the motor bearing cover that can be omitted.

To this end, the present invention is formed between a horizontal stepped portion in which a bearing cover is placed inside the motor housing, a caulking molded part formed by protruding upward between the stepped part and the cover outer wall of the housing, and a caulking formed part and a cover outer wall of the housing. The caulking forming portion is provided with a sealing gap of the motor bearing cover which is caulked around the upper surface of the bearing cover.

1 is an exploded perspective view of a portion of a typical small fan motor housing.

Figure 2 is a partial cross-sectional view for explaining the seating portion of the conventional bearing cover.

Figure 3 is a partial cross-sectional view for explaining the seating portion of the bearing cover according to the present invention.

Figure 4 is a partial cross-sectional view of the housing for explaining the sealing structure of the bearing cover is configured the present invention.

<Description of the symbols for the main parts of the drawings>

10: housing 20: bearing holder

30: bearing cover 40: cover seat

42: cover outer wall 44: cover inner wall

46: forming gap 48: caulking forming portion

50: step

Hereinafter, with reference to the accompanying drawings the configuration of the subject innovation will be described in detail.

The motor housing 10 shown in FIGS. 3 and 4 forms an exterior of one side of the motor, and main components of the motor are omitted, and for fixing the bearing and the bearing supported by the shaft built in the rotor of the motor Only the structure is briefly described.

In order to settle and fix the bearing cover 30 (see FIG. 4) of the motor inside the housing 10, the settlement part 40 is disposed between the cover outer wall 42 (see FIG. 4) and the cover inner wall 44 (see FIG. 4). ) Is formed.

The settlement portion 40 has a horizontal stepped portion 50 formed in the inner diameter direction so that the bearing cover 30 installed inside the housing 10 is settled. In addition, a caulking part 48 is formed to protrude upward between the stepped portion 50 and the cover outer wall 42 of the housing 10. A molding gap 46 is formed between the caulking forming part 48 and the cover outer wall 42 of the housing 10.

In more detail, the caulking forming part 48 is formed in a relationship to be substantially spaced apart from the cover outer wall 42 by forming the forming gap 46. The molding gap 46 may be formed through a separate process after the step portion 50 is processed during molding of the housing 10, and preferably, the mold may be used in the entire processing process of the housing, that is, the casting process. When the molding gap 46 is processed by deforming, the caulking forming part 48 is formed.

As described above, the bearing cover 30 is caulked through the caulking forming part 48 and the forming gap 46. This will be described in detail later with reference to FIG. 4.

Referring to FIG. 4, a bearing cover 5 is placed at a predetermined position inside the housing 10 configured as described above, and a bearing holder 20 is placed at an upper end of the bearing 5 and is installed thereafter. Since 30 is settled while pressing the bearing holder 20, the upper surface of the bearing 5 is pressed by the bearing holder 20 so that the position is fixed in a state in which the bearing 5 is rotatable.

After the parts are placed inside the housing 10 as described above, the position of the bearing cover 30 is accurately positioned on the stepped portion 50, and an end (not shown) of a suitable forming tool for caulking is provided on the outer wall of the cover. It enters into the molding gap 46 formed between the 42 and the caulking forming part 48. This allows the end of the forming tool to be inserted into the forming gap 46 so that a force that is not excessive than the external force applied during the normal caulking operation can be applied during the actual caulking operation. Since the external force is appropriately reduced, the defective rate at the time of molding can be remarkably improved.

Thus, the end of the forming tool fitted into the forming gap 46 presses the caulking forming portion 48 above the outer circumferential surface of the bearing cover 30 by an appropriate force as described above. Substantially, the caulking forming part 48 is pressed tightly so as to be in close contact with the bearing cover 30 so that the bearing cover 30 is completely fixed to the inside of the housing 10 while being firmly fixed to the inside of the housing 10. In particular, since the caulking forming part 48 is molded in the entire housing 10 along the step 50, the caulking forming part 48 and the bearing cover 30 are completely circumferentially compressed, so that the inside of the housing 10 is crimped. It will be able to achieve the sealing of.

As such, the caulking process is performed in a state in which excessive external force is not applied to the bearing cover 30, and in particular, the bearing holder 20 does not press the bearing 5 unduly by appropriate adjustment of the external force, thereby bearing 5. Can protect the In addition, since the caulking forming part 48 is molded entirely inside the housing 10, the bearing cover 30 serves to completely seal the inside of the housing 10.

The sealing structure of the motor bearing cover of the present invention is stably installed in the housing in which the bearing is installed by the appropriate external force, and the bearing cover completely seals the inside of the housing so that oil leaks from the inside of the motor in which oil is embedded. Since it prevents and omits an additional process, the production process of the motor is simplified and the life of the motor is extended.

Claims (1)

Hermetic structure of the bearing cover 30 formed of a horizontal step between the cover outer wall 42 and the cover inner wall 44 inside the housing 10 of the motor to settle and fix the bearing cover 30 of the motor. To A horizontal stepped portion 50 in which the bearing cover 30 is placed inside the housing 10; A caulking part 48 formed to protrude upward between the stepped part 50 and the cover outer wall 42; It consists of a molding gap 46 formed between the caulking forming portion 48 and the cover outer wall 42, characterized in that the caulking forming portion 48 is caulked around the upper surface of the bearing cover 30 Hermetic structure of the motor bearing cover.