KR100607270B1 - Journal bearing apparatus of dryer - Google Patents

Abstract

The present invention relates to a dryer, and more particularly, to a journal bearing structure that allows the drum to rotate without friction in the dryer cabinet, as well as allow the drum to be supported on the back cover and level.

Journal bearing structure of the dryer according to the present invention comprises a housing seated on the rear wall of the drum; And a journal bearing member seated in the housing, wherein the housing includes a housing seated on an outer circumferential surface of the rear wall of the drum, and an upper housing seated and screwed on an upper side of the housing, and inside the housing. A first sealing member provided in the, and the second sealing member provided on the outside of the housing is characterized in that it is provided.

The anti-friction lubricant applied to the inside of the journal bearing housing is prevented from leaking to the outside by the journal bearing structure according to the present invention.

Housing, journal bearing, drum rear wall

Description

Journal bearing structure of the dryer

1 is a cross-sectional view schematically showing a typical condensation drum dryer.

Figure 2 is a rear perspective view of the drum provided with a journal bearing structure in accordance with the teachings of the present invention.

Figure 3 is a perspective view of the housing constituting the journal bearing portion according to the spirit of the present invention.

4A is a front perspective view of a vertical housing constituting the journal bearing portion.

4B is a rear perspective view of the upper and lower housings.

5 is a perspective view of a journal bearing inserted inside the housing.

Figure 6a is a perspective view showing the outer peripheral surface of the second sealing member seated in the upper housing according to the spirit of the present invention.

6B is a perspective view illustrating an inner circumferential surface of the second sealing member.

6C is a vertical sectional view of the second sealing member seated on the upper housing;

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

100: drum 110: drum rear wall 120: circulating air through

130: load bearing end 200: journal bearing portion 210: housing

220: upper housing 230: first sealing member 300: journal bearing member

310: bearing 320: shaft 330: back cover fastening portion

400: second sealing member 410: first sealing film 420: second sealing film

The present invention relates to a dryer, and more particularly, to a journal bearing structure that allows the drum to rotate without friction in the dryer cabinet, as well as allow the drum to be supported on the back cover and level.

In general, a washing machine, a dryer or a combined washing machine provided with a drum device is a device using a rotational motion of a drum. That is, as the drum rotates, the laundry inside the drum also rotates, and the laundry rises and falls by the rotation.

For example, in the drum washing machine, a collision with the washing water occurs due to the rising and falling of the laundry, and the dirt on the laundry is removed by the collision.

In the case of a drum type dryer, a hot air generated by an electric heater or a gas combustion device is blown into a drum to absorb moisture remaining in a drying object and to dry the drying object.

The present invention can be applied to all home appliances, such as a washing machine, a dryer or a combined-use washing machine in which a drum is used as described above, hereinafter, a drum apparatus used in a dryer will be described as an example.

1 is a cross-sectional view schematically showing a general condensation drum dryer.

Referring to Figure 1, the condensation-type drum dryer is configured to control the opening and closing of the cabinet 10, the cylindrical drum 12 formed inside the cabinet 10, and the drum 12 to form an appearance A door 13 and a belt 11 surrounding the outer circumferential surface of the drum 12 are included.

In addition, the motor shaft 21 is connected to the belt 11, the motor 17 is connected to the motor shaft to provide a rotational force, and the rotational force of the motor 17 is connected to the motor shaft 21 A cooling fan 16 that sucks and rotates the indoor air is included.

In addition, a drying fan 18 connected to the motor shaft 21 opposite the cooling fan 16 to circulate air inside the drum, and air sucked by the drying fan 18 may be connected to the drum ( As a passage to be moved to 12, the drying duct 19 is provided with a heat generating unit 20 therein.

In addition, a lint filter 14 formed below the opening through which the door 13 is inserted to filter foreign matter such as lint and the like contained in the wet air discharged from the drum, and air entering the lint filter 14 are condensers (not shown). It further includes a circulation duct 15 which is a passage to be moved to).

Hereinafter, the operation of the dryer will be described.

First, when power is applied to the dryer, the motor 17 rotates, and the heater 20 attached to the drying duct 19 is heated. In addition, the belt 11 connected to the motor shaft 21 rotates to rotate the drum 12. Then, as the drum 12 rotates, the object to be dried in the drum rotates along the inner wall of the drum and falls by its own weight when it reaches the uppermost side. Here, the object to be dried is lifted by a lift (not shown) attached to the inner wall of the drum.

On the other hand, the drying fan 18 connected to the motor shaft 21 is operated with the rotation of the motor 17, the circulating air passing through the lint filter 14 is sucked. The sucked air rises along the drying duct 19 and becomes a high temperature dry state through the heater. Then, the hot dry air absorbs the moisture present in the object to be dried while passing through the drum, resulting in a high temperature and high humidity.

In addition, the air of the high temperature and high humidity is again filtered by the lint filter 14 and then moved to a capacitor (not shown) along the circulation duct 15.

In addition, the cooling fan 16 connected to the motor shaft 21 is rotated to suck the indoor air outside the dryer. The sucked indoor air is then passed through a cooling fan 16 to the condenser.

Here, the hot and humid air moved to the capacitor along the circulation duct 15 and the indoor air sucked by the cooling fan 16 and moved to the capacitor pass through the capacitor. In addition, the hot and humid air and the indoor air are not mixed with each other by the shape of the capacitor, and only heat exchange occurs.

Therefore, the high temperature and high humidity air is changed to low temperature and high humidity air while losing heat to the indoor air while passing through the condenser. Then, as the temperature decreases, moisture contained in the air condenses and falls to the bottom of the condenser, and is moved to a sump (not shown) in which condensate is collected.

In addition, the water moved to the sump is moved to a condensate reservoir (not shown) located at the top of the dryer by a condensation pump.

On the other hand, the indoor air passing through the capacitor takes the heat of the high temperature and high humidity air and converts it into low temperature and high humidity air, and the temperature becomes high.

An object of the present invention is to provide a journal bearing structure of a dryer for supporting a drum and allowing the drum to rotate freely without friction.

In addition, an object of the present invention is to provide a journal bearing structure of a dryer having a sealing member in which a lubricant for preventing friction applied to the journal bearing is not leaked to the outside.

Journal bearing structure of the dryer according to the present invention for achieving the above object is a housing seated on the rear wall of the drum; And a journal bearing member seated inside the housing, wherein the housing includes a housing seated on an outer circumferential surface of the rear wall of the drum, and an upper housing seated and screwed on an upper side of the housing. A first sealing member provided in the, and the second sealing member provided on the outside of the housing is characterized in that it is provided.

By the above configuration, the antifriction lubricant applied to the inside of the journal bearing housing is prevented from leaking to the outside.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the spirit of the present invention is not limited to the embodiments presented, and other embodiments included within the scope of other inventive inventions or the scope of the present invention can be easily made by adding, changing, or deleting other elements. I can suggest.

2 is a rear perspective view of a drum provided with a journal bearing structure according to the spirit of the present invention.

Referring to FIG. 2, a rear surface of a drum 100 having a journal bearing structure according to the present invention includes a drum rear wall 110 and a journal bearing portion 200 attached to a center of the drum rear wall 110. .

In detail, the drum rear wall 110 is formed with a plurality of circulating air through-holes 120 so that hot dry air coming from a drying duct (not shown) flows into the drum, and from the center of the drum rear wall 110. The load supporting end 130 is formed by being embossed in the radial direction.

In more detail, the load of the drum 100 is transmitted to the journal bearing portion 200, and the load of the drum 100 delivered to the journal bearing portion 200 is distributed and transmitted to the drum rear wall 110 again. do. However, the drum rear wall 110 has a plurality of circulating air through holes 120, as shown in the figure, the shape may be deformed when the drum rear wall 110 receives a load corresponding to the weight of the drum (100). have. Therefore, in order to distribute the load transmitted to the drum rear wall 110 and to maintain the shape of the drum rear wall, the load supporting end 130 is formed to be radially symmetrical.

Figure 3 is a perspective view of the housing constituting the journal bearing portion according to the spirit of the present invention, Figure 4a is a front perspective view of the upper housing constituting the journal bearing portion, Figure 4b is a rear perspective view of the upper housing, Figure 5 A perspective view of a journal bearing inserted inside the housing.

3, 4A, 4B and 5, the journal bearing portion 200 according to the present invention is a housing 210 is attached to the drum rear wall 110 and the image coupled to the housing And a journal bearing member 300 seated between the housing 220 and the upper housing 220 and the housing 220.

In detail, the housing 210 is seated in the central portion of the rear wall of the drum 110, the central portion of the rear wall of the drum 110, the journal portion mounting groove 140 for mounting the housing 210 is a predetermined depth. It is made to be depressed.

In addition, as a housing fastening member 211 for coupling the housing 210 and the drum rear wall 110, a plurality of riveting the body surface 217 and the drum rear wall 110 of the housing 210. It is preferable to combine. This is for the fastening member for coupling the housing 210 and the drum rear wall 110 to protrude into the drum 100 so that the drying object is not damaged. However, it is noted that the coupling of the housing 210 and the drum rear wall 110 is not limited to the riveting coupling that is an embodiment of the present invention.

In addition, the housing 210 is an extension end of the housing fastening portion in which the housing fastening portion 214 is formed at the same position as the load supporting end 130 formed on the rear wall of the drum to engage the upper housing 220. 212 is formed. The housing fastening part 214 extends downward by a predetermined length. Accordingly, the fastening member may more stably bind the housings 210 and 220 than the case where the depth of the housing fastening part 214 is equal to the thickness of the housing fastening part extension 212.

In detail, the housing fastening portion extension 212 is formed to extend slightly more radially from the circumferential surface of the housing 210, and is formed higher than the housing body surface 217. This is to prevent the extension portion from interfering with the drum rear wall 110 while the housing fastening portion 214 extends downward by a predetermined length.

In addition, the temporary assembly protrusion insertion groove 213 is formed at a position spaced apart from the housing fastening portion 214 by a predetermined distance in the center direction of the housing 210.

By inserting the provisional projection to be described later in the provisional assembly projection insertion groove 213, the upper housing 220 and the housing 210 can be accurately positioned before being coupled by the fastening member.

In addition, a first sealing member contact surface 216 which has a predetermined diameter and rises upward is formed at the center of the housing 210, and a journal having a predetermined depth inside the first sealing member contact surface 216. The bearing seating groove 215 is provided. A lubricant is applied to the surface of the journal bearing seating groove 215.

As described above, the first sealing member contact surface 216 is in contact with the first sealing member described below, and the journal bearing seating groove 215 has a spherical bearing seated to make surface contact.

On the other hand, the upper housing 220 is seated on the upper side of the housing 210 is coupled by the housing fastening member has a substantially triangular shape, the housing fastening groove 224 is formed at the edge corresponding to each vertex. . The housing fastening groove 224 formed in the upper housing 220 and the housing fastening portion 214 formed in the housing 210 coincide with each other in position. Here, the shape of the upper housing 220 is not limited to the shape of the substantially triangular presented in the embodiment of the present invention, it will be found that the deformation is possible depending on the shape of the housing (210).

Looking at the inner circumferential surface of the upper housing 220, the first sealing member seating hole 231 on which the first sealing member 230 is seated is formed to be recessed to a certain depth from the bottom of the upper housing 220. In addition, a bearing seating portion 222 formed in the first sealing member seating hole is further recessed to a predetermined depth.

In addition, a cylindrical sleeve having a predetermined diameter and extending a predetermined length is formed at the center of the bearing seat 222.

In detail, the sleeve is a second sealing member accommodating sleeve 225 described later, and the cylindrical inner diameter is a shaft through groove 221 of the journal bearing member described later.

In more detail, the outer diameter of the second sealing member receiving sleeve 225 is the same as the inner diameter of the second sealing member, and the diameter of the shaft through hole 221 is the same as the outer diameter of the journal bearing shaft.

The first sealing member 230 seated in the first sealing member seating hole 231, the lubricant applied to the inner surface of the housing leaks between the coupling surface of the upper housing 220 and the housing 210. To prevent it.

In addition, the lubricant applied to the inner surface of the housing, so that the journal bearing does not cause friction with the inner surface of the housing 210, 220, and also serves to reduce the heat generated by the friction.

 In addition, the first sealing member 230 is preferably a felt material that can easily absorb the noise due to the lubricant and friction applied to the inner surface of the housing.

In addition, at least two temporary assembly protrusions 223 are formed inside the housing fastening groove 224, and the temporary assembly protrusions 223 are inserted into the temporary assembly protrusion insertion grooves 213 formed in the housing 210. . At least two preliminary assembling protrusions 223 are formed so as to be exactly aligned with the housing 210.

In addition, the journal bearing member 300 inserted between the upper housing 220 and the housing 210 is a spherical shape coupled to the shaft 320, the mold injection to the outer peripheral surface of the shaft 320 by insert injection method The bearing 310 is included. In addition, the upper outer peripheral surface of the shaft 320 is formed with a back cover fastening portion 330 in which a thread is formed.

In detail, the back cover fastening part 330 penetrates through the journal bearing through groove 221 formed in the upper housing 220 and the back cover (not shown) of the dryer, and tightens the nut to horizontally rotate the drum 100. To be maintained.

In addition, the bottom surface of the bearing 310 having a spherical shape has a shape cut in a predetermined portion in the direction perpendicular to the central axis of the shaft 320, the oil groove 311 to facilitate the lubricant flow on the outer peripheral surface Is formed.

Therefore, when the journal bearing 310 is seated in the journal bearing seating groove 215 of the housing 210, a predetermined space is formed between the bottom surface of the bearing 310 and the journal bearing seating groove 215. Is formed. In addition, the lubricant on the oil groove 311 flows down the oil groove 311 and is collected in the space. In addition, while the drum 100 rotates, the lubricant flows along the space and the oil groove 311 and is applied to the front surface of the bearing 310.

Figure 6a is a perspective view showing the outer peripheral surface of the second sealing member seated in the upper housing according to the spirit of the present invention, Figure 6b is a perspective view showing the inner peripheral surface of the second sealing member, Figure 6c is the second sealing member is It is a vertical cross-sectional view seated on the upper housing.

6A, 6B and 6C, the second sealing member according to the present invention is manufactured by attaching a sealing member of a rubber material to a circular shape of a metal material through an insert injection method. The second sealing member 400 is inserted into an outer circumferential surface of the second sealing member accommodating sleeve 225.

The second sealing member 400 is attached to prevent the lubricant applied to the inside of the housing from leaking to the outside by riding the shaft 320 and the back cover fastening part 330 of the journal bearing part 300. It is.

The second sealing member 400 has an inner diameter equal to the outer diameter of the second sealing member receiving sleeve 225, and is formed on the inner bottom surface and the second sealing film 420 formed on the outer bottom as shown. The first sealing film 410 is included.

In addition, the groove formed in the center of the sealing film 410, 420 is formed to be the same as the outer diameter of the back cover fastening portion 330 of the journal bearing portion 300. The first sealing film 410 is formed on an inner circumferential surface of the second sealing member 400 and is positioned at a depth corresponding to the length of the second sealing member receiving sleeve 225.

In addition, since the second sealing film 420 is formed on the rear side of the first sealing film 410, the oil leakage is blocked twice.

Reference numeral 430, which is not described above, is a back cover fastening portion through groove.

The anti-friction lubricant applied to the inside of the journal bearing housing is prevented from leaking out by the journal bearing structure according to the present invention having the above configuration.

Claims (6)

A housing seated on the rear wall of the drum; And And a journal bearing member seated inside the housing. The housing includes a housing mounted on an outer circumferential surface of the rear wall of the drum, an upper housing seated on the upper side of the housing, and coupled to the housing, a first sealing member provided inside the housing, and provided outside the housing. Journal bearing structure of a dryer, characterized in that the second sealing member is provided. The method of claim 1, The upper housing has a sealing member seating groove is formed to be recessed to a predetermined depth therein, the journal bearing structure of the dryer, characterized in that the annular first sealing member is seated in the sealing member seating groove. The method of claim 1, Journal bearing structure of the dryer characterized in that the first sealing member is a felt material.  The method of claim 1, The center of the outer circumferential surface of the upper housing is provided with a sealing member receiving sleeve having a predetermined diameter and extending a predetermined length, the journal bearing structure of the dryer, characterized in that the second sealing member is inserted into the sealing member receiving sleeve outer peripheral surface. The method of claim 1, The second sealing member is a journal bearing structure of a dryer, characterized in that the sealing member of the rubber material is coupled to the circular shape of the metal material by the insert injection method. The method of claim 1, The second sealing member includes a second sealing film formed on the outer bottom surface and a first sealing film formed on the inner bottom surface, the journal bearing structure of the dryer, characterized in that the through groove having a predetermined diameter is formed in the center. .

Images