KR20060095714A - Journal bearing in drying machine - Google Patents

Abstract

 The present invention relates to a clothes dryer, and more particularly, to a journal bearing for a clothes dryer.

 The present invention includes a supporter having a hemispherical bearing receiving groove formed on one side and coupled to a drum; A housing having a hemispherical bearing receiving groove formed on a surface corresponding to the groove of the supporter, the housing being coupled to the supporter; A bearing sphere installed in the space of the bearing accommodation groove of the supporter housing to allow relative rotation of the supporter and the housing; It provides a journal bearing of the dryer comprising: a solid lubricant coupled to the surface of the bearing sphere to lubricate between the bearing sphere and the bearing receiving groove.

In addition, at least one groove is formed along the periphery of the surface of the bearing sphere, the solid lubricant is formed of a molybdenum disulfide-based material and is formed in the form of a hollow sphere to be bonded to the surface of the bearing sphere, the bearing It is characterized by consisting of several ribs located in the groove of the sphere.

Therefore, according to the journal bearing of the dryer of the present invention, there is an effect that the oil leakage does not occur and the lubrication characteristic does not change even when the thermal change.

Dryer, Journal Bearing, Solid Lubricant, Molybdenum Disulfide

Description

Journal bearing in drying machine

1 is a longitudinal sectional view schematically showing a structure in which a drum is installed in a conventional general clothes dryer.

Figure 2 is an exploded perspective view showing the structure of the journal bearing installed between the drum and the rear of the cabinet of Figure 1;

3 is an exploded perspective view showing a preferred embodiment of the journal bearing of the dryer of the present invention.

4 is a cross-sectional view showing the assembled state of the journal bearing of FIG.

* Explanation of Signs of Major Parts of Drawings

110: supporter 111: bearing receiving groove

113: fastening hole 120: housing

121: bearing receiving groove 123: fastening hole

124: shaft through hole 150: bearing part

152: bearing sphere 154: bearing shaft

156: lubricating foam 160: solid lubricant

162: rib

The present invention relates to a clothes dryer, and more particularly, to a journal bearing for a clothes dryer.

 In general, the clothes dryer is a device that blows hot air generated by a heater into a drum and absorbs moisture of a drying object to dry the drying object. The clothes dryer absorbs moisture to dry the drying object. According to the treatment method, it is divided into exhaust type clothes dryer and condensation clothes dryer.

 Hereinafter, a clothes dryer according to the prior art will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, a clothes dryer according to the related art includes a cabinet 1 forming an appearance and a drum 30 rotatably installed inside the cabinet 1.

The front of the cabinet (1) is provided with an opening (5) for injecting clothes, a circular rib 2 is formed along the periphery of the opening (5).

The circular rib 2 is inserted into the front inner side of the drum 30 to support the front of the drum 30.

On the other hand, the rear of the drum 30 is rotatably installed on the rear (3) of the cabinet.

That is, as shown in Figs. 1 and 2, the drum is rotatably installed at the rear of the cabinet by journal bearings at the rear thereof.

The journal bearing is provided as follows. The drum 30 is coupled to a supporter 10 having a semicircular bearing receiving groove 11 in cross section and a housing 20 having a semicircular bearing receiving groove 21 in cross section.

That is, as the supporter 10 and the housing 20 are coupled to each other, the hemispherical bearing receiving grooves 11 and 21 are combined to form bearing receiving grooves 11 and 21 having a spherical space.

In addition, the bearing part 50 is installed inside the circular bearing receiving grooves 11 and 21 formed when the supporter 10 and the housing 20 are coupled to each other.

The bearing portion 50 is provided with a spherical bearing sphere 52 and a bearing shaft 56 on the side facing the cabinet rear surface 3 of the bearing sphere 52, the bearing shaft 56 is The lock nut 57 is coupled to the rear surface 3 of the cabinet.

In addition, although not shown, the felt is seated in the bearing receiving grooves (11, 21) formed in each of the supporter (10) and the housing (20), grease (grease) is to be filled to lubricate.

Therefore, when the dryer 30 operates and the drum 30 rotates, the bearing part 50 fixed to the rear side 3 of the cabinet is fixed, but the supporter 10 coupled to the rear side of the drum 30 is fixed. And while the housing 20 is rotated relative to the bearing sphere 52 so that the drum 30 can be rotated smoothly.

However, the installation structure of the journal bearing for the conventional condensation type clothes dryer has the following problems.

First, as the use time of the dryer flows, a small amount of grease, which acts as a lubricant, leaks out of the supporter and the housing little by little, resulting in a phenomenon of reduced lubrication.

Second, when the rotation of the drum continues for a certain time, the grease is heated due to the frictional heat with the bearing sphere, which causes the grease volume to expand and leak out a small amount to the outside of the supporter and the housing. In addition, there is a problem in that the lubrication deterioration phenomenon occurs due to deterioration of lubricating properties of grease.

The present invention is to solve the above problems, it is an object of the present invention to provide a journal bearing of a dryer in which the lubricant is not leaked and the lubrication deterioration does not occur.

In order to achieve the above object, the present invention provides a supporter coupled to the drum is formed with a bearing receiving groove of a hemispherical shape on one side; A housing having a hemispherical bearing receiving groove formed on a surface corresponding to the groove of the supporter, the housing being coupled to the supporter; A bearing sphere installed in the space of the bearing accommodation groove of the supporter housing to allow relative rotation of the supporter and the housing; It provides a journal bearing of the dryer comprising: a solid lubricant coupled to the surface of the bearing sphere to lubricate between the bearing sphere and the bearing receiving groove.

In addition, at least one groove is formed along the circumference of the surface of the bearing sphere, and the solid lubricant is formed in the form of a hollow sphere so as to be coupled to the surface of the bearing sphere, which is located in the groove of the bearing sphere It is characterized by consisting of ribs.

In addition, the solid lubricant is formed of a molybdenum-based material under disulfide and the solid lubricant is formed integrally with the bearing sphere or divided into two or more pieces, characterized in that coupled to the surface of the bearing sphere.

Therefore, according to the journal bearing of the dryer of the present invention, oil leakage does not occur, and there is an effect that lubrication decrease does not occur even in thermal load.

Hereinafter, with reference to the accompanying drawings a preferred embodiment according to the journal bearing of the dryer of the present invention that can specifically realize the above object.

Here, the same components as in the prior art are given the same names and the same reference numerals for convenience of description, and description thereof will be omitted.

Referring to FIG. 3, the journal bearing of the dryer of the present invention includes a supporter 110 coupled to a drum 30 (see FIG. 1), a housing 120 coupled to the supporter 110, and the supporter 110. A bearing unit 150 installed between the supporter 110 and the housing 120 to allow relative rotation between the supporter 110 and the housing 120, and the bearing unit 150, the supporter 110, and the housing 120. It is provided with a solid lubricant 160 for lubricating between.

In more detail,

The supporter 110 is coupled to the rear center portion of the drum 30 (see FIG. 1), and a substantially hemispherical bearing receiving groove 111 is formed at the center of the opposite surface coupled to the drum 30 (see FIG. 1). .

In addition, a plurality of fastening holes 113 are provided along the circumference of the supporter 110 to couple with the drum 30 (see FIG. 1).

At this time, although not shown in the drawings, each of the fastening holes 113 may take the form of a boss (not shown) for the purpose of reinforcing strength in order to prevent breakage during rotation of the drum 30 (see FIG. 1). have.

In addition, the housing 120 is coupled to the supporter 110, the hemispherical bearing like the supporter 110 so as to form a sphere-shaped space between the supporter 110 and coupled to the supporter 110. The receiving groove 121 is formed.

 That is, as the supporter 110 and the housing 120 are coupled, the bearing receiving grooves 111 and 121 of each hemispherical shape are combined to form bearing receiving grooves 111 and 121 having a spherical space.

In addition, a shaft through hole 124 through which a bearing shaft 154 to be described later penetrates is formed at a central portion of the bearing accommodation groove 121 of the housing 120.

In addition, a plurality of fastening holes 123 are formed in the housing 120 at positions corresponding to the fastening holes 113 of the supporter 110 along the circumference thereof.

At this time, as described above, each of the fastening holes 123 may take the form of a boss for the purpose of reinforcing strength in order to prevent breakage during rotation of the drum.

In addition, a bearing unit 150 is installed between the supporter 110 and the housing 120.

The bearing portion 150 is composed of a bearing sphere 152 having a substantially spherical shape and a bearing shaft 154 extending to one side of the bearing sphere 152.

The bearing sphere 152 is installed in a spherical space formed by the bearing receiving grooves 111 and 121 of the supporter 110 and the housing 120.

In addition, the bearing shaft 154 penetrates through the shaft through holes 124 formed in the bearing accommodation grooves 111 and 121 of the housing 120 and locks the lock nut 57 to the rear surface 3 of the cabinet (see FIG. 1). (See Fig. 1).

In addition, the bearing sphere 152 is formed with at least one groove along the circumference of the surface, this groove will be referred to as lubrication groove 156.

And, the surface of the bearing sphere 152 is provided with lubrication means for lubricating between the bearing sphere 152 and the bearing receiving grooves (111, 121) to prevent friction.

Here, according to a preferred embodiment of the journal bearing of the dryer of the present invention, the lubrication means has no possibility of oil leakage, it is excellent in corrosion resistance and abrasion resistance, heat resistance and is applied to the solid lubricant 160 excellent in severe load and thermal properties desirable.

The solid lubricant 160 is representative of graphite and molybdenum disulfide (MoS 2) -based materials, and the solid lubricant 160 in the present embodiment is preferably made of the material of the molybdenum disulfide-based material.

Briefly, the characteristics of the molybdenum disulfide shows a low coefficient of friction from normal pressure to a high temperature of about 400 ° C. under normal pressure or vacuum due to its high load resistance and low coefficient of friction as compared with other solid lubricants.

In addition, the load-bearing capacity (pressure resistance) is about 28,000kgf / ㎠ as a material exhibiting excellent performance in extreme pressure, it will be known to those skilled in the art will not be described in detail.

In addition, the solid lubricant 160 is preferably formed of a substantially hollow sphere (毬) to form a coupling to surround the surface of the bearing sphere 152, lubrication formed on the surface of the bearing sphere 152 It is preferable to form a spherical shape as the ribs 162 of the fork to be inserted into the groove 156.

Here, the solid lubricant 160 is preferably divided into two or more pieces to form a sphere while being coupled to the surface of the bearing sphere 152 for convenience and productivity of the assembly, but is not necessarily limited thereto, the bearing sphere The surface of 152 may be integrally formed by insert molding or the like.

Accordingly, the operation of the journal bearing of the dryer of the present invention will be described with reference to FIG. 4.

When the dryer operates to rotate the drum 30 (see FIG. 1), the bearing part 150 fixed to the rear side 3 of the cabinet is fixed, but the rear side of the drum 30 (see FIG. 1) is fixed. The supporter 110 coupled to the housing 120 rotates, and moves relative to the bearing sphere 152 located inside the bearing accommodation grooves 111 and 121.

At this time, since the solid lubricant 160 is covered on the outer circumferential surface of the bearing sphere 152 in the form of a rib 162, damage caused by direct friction by lubricating between the bearing sphere 152 and the bearing receiving grooves 111 and 121. Will be prevented.

Therefore, according to a preferred embodiment of the journal bearing of the dryer of the present invention, by applying a molybdenum disulfide-based solid lubricant as a lubricant to lubricate the journal bearing, oil leakage does not occur as when grease is applied, Lubrication deterioration is not caused by this effect.

As described above, according to the journal bearing of the dryer of the present invention, the following effects are obtained.

First, by applying a solid lubricant as a lubricating means, there is an effect that does not occur, such as when using grease.

Second, the use of molybdenum disulfide series as a material of the solid lubricant has the effect that the melting phenomenon or the lubrication deterioration phenomenon does not occur due to the high temperature thermal load.

Claims (5)

A supporter coupled to the drum by forming a bearing receiving groove having a hemispherical shape on one side; A housing having a hemispherical bearing receiving groove formed on a surface corresponding to the groove of the supporter, the housing being coupled to the supporter; A bearing sphere installed in the space of the bearing accommodation groove of the supporter to allow relative rotation of the supporter and the housing; And a solid lubricant coupled to a surface of the bearing sphere to lubricate between the bearing sphere and the bearing accommodation groove. The method of claim 1, At least one groove is formed along the circumference of the bearing sphere, The solid lubricant is formed in the form of a hollow sphere to be coupled to the surface of the bearing sphere, journal bearing of the dryer, characterized in that consisting of a plurality of ribs located in the groove of the bearing sphere. The method of claim 1, The solid lubricant is a journal bearing of the dryer, characterized in that the disulfide molybdenum (MoS2) is formed of a material. The method according to claim 1 or 2, The solid lubricant is journal bearing of the dryer, characterized in that formed integrally with the bearing. The method according to claim 1 or 2, The solid lubricant is formed by dividing the two pieces or more journal bearing of the dryer, characterized in that bonded to the surface of the bearing.

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