KR20160007275A - Washing machine - Google Patents

Abstract

The present invention relates to a washing machine. More specifically, the present invention comprises: a casing forming appearance; a support rod of which one end is connected with the casing; and a suspension connecting the other end of the support rod to an outer tub to enable the outer tub to be suspended inside the casing and buffering vibration of the outer tub. The suspension comprises: an air cap, where the other end of the support rod penetrates, mounted on an outer circumference of the outer tub to be moved along the support rod during vibration of the outer tub; a first friction member disposed inside the air cap while being inserted into the support rod and coming in contact with an inner side surface of the air cap; and a second friction member disposed to come in contact with the support rod and applying a larger frictional force than the frictional force applied between the first friction member and the inner side surface of the air cap between the second friction member and the support rod. Therefore, according to the present invention, the washing machine can effectively reduce vibration.

Description

Washing machine

The present invention relates to a washing machine, and more particularly, to a washing machine capable of effectively damping vibration.

Generally, a washing machine is an apparatus for washing clothes using an emulsifying action of a detergent, a water flow action caused by the rotation of the washing tub or the laundry blades, and a shock action applied by the laundry blades, and uses laundry detergent and water Washing, rinsing and / or dehydration so as to remove the contamination on the surface of the substrate (hereinafter referred to as a "substrate").

An ordinary washing machine includes a casing forming an outer appearance of a washing machine, an outer tank accommodated in a form suspended from the casing, and an inner tub rotatably provided in the outer tub. Further, the washing machine further includes a suspension for damping the vibration of the outer tub when the inner tub and / or the pulsator rotates.

In general, the suspension is realized by a structure that attenuates the vibration generated from the outer tank by using elasticity / restoring force by the spring, viscous force of the fluid, and the like. However, such a suspension effectively damps vibrations in a steady state where the outer tub oscillates within a certain amplitude range, but there is a limit to attenuating the vibrations in a transient vibration state that oscillates at a larger amplitude than the normal vibration state.

In other words, in the case of designing a normal suspension to be optimized to a transient vibration state having a large amplitude, the vibration damping effect is degraded to a normal vibration state having a relatively small amplitude. On the contrary, when the suspension is designed optimally for a normal vibration state, There is a problem that the vibration damping effect can not be expected. Therefore, it is necessary to take measures to effectively damp the vibration in both the normal vibration state and the transient vibration state.

The conventional suspension has a friction member which is moved along the support rod. The friction energy is converted into heat energy by the friction action between the friction member and the support rod, thereby attenuating vibration. In this case, There is a problem in that it is thermally denatured or is stuck to the support rod to hinder the friction action. Particularly, a lubricant is applied to the support rod in order to suppress overheating due to friction while maintaining a constant viscosity between the friction member and the support rod. In the conventional washing machine, after the manufacture of the washing machine is completed, It was a very difficult structure to supplement.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a washing machine equipped with a suspension which is easy to replenish lubricant.

Secondly, the present invention provides a washing machine having a structure in which a receiving portion main body containing a friction portion that acts a frictional force between the supporting rod and the outer tub supporting portion supporting the outer tub above the receiving portion main body can be separated.

Third, the present invention provides a washing machine in which the normal vibration state in which the vibration width of the outer tank is within a predetermined range and the damping action in the transient vibration state state in which the vibration width of the outer tank is relatively large are different.

Fourth, by attenuating the vibration of the outer tank, space utilization in the casing is improved, and in particular, a washing machine with a larger capacity of the outer tank is provided.

Fifth, a washing machine with improved durability and stability and reduced noise generation due to vibration is provided.

The washing machine of the present invention comprises a casing; The wash tank contains the outer tank; A support rod having one end connected to the casing and the other end having a support end; A first frictional portion and a second frictional portion movably provided along the support rod to exert frictional force with the support rod; A first accommodating portion which is movably provided along the support rod and in which the first frictional portion is fixedly disposed and a second accommodating portion which accommodates the second frictional portion, the accommodating portion being displaceable with respect to the second frictional portion, main body; An outer tub supporting part formed independently from the receiving part main body and movable along the support rod and supporting the outer tub from above the receiving part; And an elastic member supported by the supporting end and resiliently supporting the receiving portion main body.

Alternatively, the washing machine of the present invention comprises a casing; The wash tank contains the outer tank; A support rod having one end connected to the casing and the other end having a support end; A first frictional portion and a second frictional portion movably provided along the support rod to exert frictional force with the support rod; A support for supporting the outer tank, the outer tank supporting member being movable along the support rod; And a receiving portion main body movably provided along the support rod at a lower side of the outer tub supporting portion to provide a space for accommodating the first friction portion and the second friction portion, The space in which the first friction portion is accommodated is opened at an upper portion facing the outer tub supporting portion.

INDUSTRIAL APPLICABILITY The washing machine of the present invention has an effect of being able to easily replenish a lubricant to a suspension. Particularly, the lubricant can be directly injected into the friction portion which acts between the support rod and the frictional portion.

In addition, there is a structure in which a receiving portion main body containing a frictional portion acting to exert frictional force with the support rod and a supporting portion for supporting the outer tub from above the receiving portion main body are separable, The lubricant can be injected directly into the sub-body, making it easy to replenish and maintain the lubricant.

Further, the vibration can be effectively attenuated not only in a normal vibration state in which the vibration width of the outer tub is within a predetermined range but also in a transient vibration state out of the predetermined range.

In addition, by damping the vibration of the outer tank, space utilization in the casing is improved, and in particular, the capacity of the outer tank is enlarged compared with the conventional one.

Further, durability and stability are improved, and noise generation due to vibration is reduced.

1 is a side sectional view of a washing machine according to an embodiment of the present invention.
FIG. 2 is a partial perspective view showing a structure in which a suspension is mounted on the outer tank shown in FIG. 1. FIG.
3 is a partially enlarged view of the portion A shown in Fig.
4 illustrates a suspension according to an embodiment of the present invention.
Fig. 5 shows the receiving unit main body shown in Fig.
6 is a cross-sectional view of the coupling portion of the outer tub supporter and the receptacle main body.
7 illustrates a suspension according to another embodiment of the present invention.
8 is a partial exploded view of the suspension shown in Fig.
9 shows (a) a suspension according to another embodiment of the present invention, (b) a friction member applied thereto, and (c) a housing body.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

1 is a side sectional view of a washing machine according to an embodiment of the present invention. FIG. 2 is a partial perspective view showing a structure in which a suspension is mounted on the outer tank shown in FIG. 1. FIG. 3 is a partially enlarged view of the portion A shown in Fig. 4 illustrates a suspension according to an embodiment of the present invention.

1 to 4, a washing machine according to an embodiment of the present invention includes a casing 1 for forming an outer appearance, operation keys for receiving various control commands from a user, information about operation states of the washing machine, And a door 7 which is rotatably installed in the casing 1 and opens and closes an access hole (not shown) through which the laundry enters and exits.

The outer tub 2 containing the washing water is suspended inside the casing 1 by the support rod 15 and the inner tub 3 accommodating the laundry is rotatably provided around the vertical axis And a pulsator 4 is rotatably provided on the bottom of the inner tank 3. [ The inner bath (3) is provided with a plurality of holes through which wash water flows.

The casing defined in the present invention suffices to form the appearance of the washing machine, but in particular, it is preferable that the casing is fixedly fixed so that one end of the supporting rod 15 hanging the outer tank 2 can be fixed by the casing Do. It should be noted that the casing 1 described below is only an example of a configuration for forming the appearance of the washing machine and the scope of the casing described in the claims of the present application is not necessarily limited thereto.

The casing 1 includes a cabinet 12 having an upper opening and a top cover 14 provided on the upper side of the cabinet 12 and having an entrance hole through which laundry enters and exits in a substantially central portion.

The supporting rod 15 is elongated in the longitudinal direction and has one end connected to the casing 1 and the other end connected to the outer tub 2 by the suspension 100. One end of the support rod 15 may be connected to either the cabinet 12 or the top cover 14 and the cabinet 12 or the top cover 14 may be connected such that the support rod 15 is pivotably connected (Not shown).

The support rod 15 may include a support end 160 provided at the other end. The supporting end 160 supports the elastic member 150 extruded to the supporting rod 15 so as not to be detached from the supporting rod 15. The supporting end 160 preferably has a larger supporting surface for supporting the lower end of the elastic member 150 than the cross section of the rod so that the elastic member 150 is not separated from the supporting rod 15. [

The rotation of the elastic member 150 about the support rod 15 can be restrained by the support end 160. According to the embodiment, the support end 160 may be formed with a coupling part that engages with the lower end of the elastic member 150, or a locking protrusion that restricts rotation of the lower end.

The water supply channel 5 is connected to an external water source such as a faucet to supply water to the outer tub 2 and / or the inner tub 3. The water supply valve 6 interrupts the water supply flow path. The driving unit 13 drives the inner tank 3 and / or the pulsator 4. The drainage flow path 9 drains the washing water in the outer tub 2. The drain valve (8) interrupts the drainage passage (9). The drain pump 10 pumps the wash water drained into the drainage flow path 9 to the outside of the washing machine.

The suspension 100 attenuates the vibration of the outer tub 2 caused by the rotation of the inner tub 3 or the pulsator 4. The suspension 100 is coupled to the lower end of the outer tub 2, and this coupling can be made detachable so as to facilitate the installation and separation of the suspension 100. 3 shows a mount 2a protruding from the outer circumferential surface of the lower portion of the outer tub 2 for the installation of the suspension 100. The mount 2a extends in the vertical direction, The slit 2b was formed.

The combination of the suspension 100 and the outer tank 2 is such that the support rod 15 is inserted into the mount 2a through the side opening of the slit 2b with the suspension 100 mounted on the support rod 15 And the mount 2a is seated on the outer tub supporter 110 to be described later. Since the load of the outer tank 2 always acts on the outer tank supporting portion 110, the outer tank 2 and the outer tank supporting portion 110 move integrally without being separated. The separation of the suspension 100 for maintenance and repair is facilitated by pulling the suspension 100 downward a little and then withdrawing the support rod 15 through the side opening of the slit 2b.

The suspension 100 includes a supporter supporting portion 110, a receiving portion main body 120, an elastic member 150, a first friction portion 130, and a second friction portion 140.

The outer tub supporting portion 110 supports the outer tub 2 and is provided to be movable along the supporting rod 15. The outer tub supporting portion 110 includes a tubular slider 111 through which the support rod 15 passes and a seating portion 112a extending outwardly from the slider 111 to form a seating surface 112a on which the outer tub 2 is seated 112). The seating portion 112 can be hooked to the mount 2a of the outer tub 2 and at least a part of the slider 111 can be projected to the upper side of the mount 2a.

The receiving portion main body 120 is movably provided along the support rod 15 and is resiliently biased by the elastic member 150. The lower end of the elastic member 150 is supported by the support end 160, and the upper end supports the accommodation portion main body 120.

The outer tub supporting portion 110 supports the outer tub 2 from above the receiving portion main body 120. The supporter supporting portion 110 may be detachably coupled to the receiving portion main body 120. This structure makes it easy to inject lubricant. It is necessary to inject or replenish the lubricant not only in the manufacturing process of the washing machine but also in terms of maintenance during use. At this time, the outer tongue support part 110 separated from the receiving part main body 120 is pushed upwards to expose the support rod 15 which was hidden by the outer tongue support part 110, and the lubricant can be directly applied to the exposed part have. Furthermore, the lubricant can be injected to the first friction portion 130 or the second friction portion 140 disposed inside the receiving portion main body 120. [ This injection of the lubricant is very convenient because it can be done without separating the suspension 100 from the support rod 15.

Since the outer tub supporting portion 110 supports the outer tub 2 from the upper side of the receiving portion main body 120 even if the outer tub supporting portion 110 is not firmly coupled to the receiving portion main body 120, 2, the outer tub supporting portion 110 and the receiving portion main body 120 can be integrally moved together, that is, they can be moved together along the support rod 15. [

Each of the first friction part 130 and the second friction part 140 is provided so as to be movable along the support rod 15 so that a frictional force is generated between the first friction part 130 and the second friction part 140, The motion friction force). The first frictional portion 130 and the second frictional portion 140 are accommodated in the receiving portion main body 120. The first frictional portion 130 and the second frictional portion 140 may each include a friction member which exerts a frictional force between the first frictional portion 130 and the second frictional portion 140 and the outer peripheral surface of the support rod 15.

The friction member may be made of a porous material such as felt or an elastic material such as rubber or the like and may be formed in a tubular shape so as to be extrapolated to the support rod 15 in terms of shape, It may be in the form of a sheet or a band having flexibility so as to be rolled along the outer circumferential surface of the rod 15. [ Particularly, the friction member made of fibers is excellent in the absorbability of the lubricant. Hereinafter, the friction member provided on the first friction member 130 is referred to as a first friction member, and the friction member provided on the second friction member 140 is referred to as a second friction member.

According to an embodiment, the first friction portion 130 and the second friction portion 140 may include a receiver (e.g., a second friction member housing 142) that receives a friction member. Such a receiver serves to firmly support the friction member and maintain its external shape as well as to stably support the movement of the friction members 130 and 140 by sliding along the inner peripheral surface of the receiving unit main body 120. [ Since the first friction part 130 is fixed to the receiving part main body 120, the first friction part 130 can be supported by the first receiving part 121 formed by the receiving part main body 120. Hereinafter, The portion 130 is a friction member itself.

The frictional action between the two frictional portions 130 and 140 and the support rod 15 varies depending on the vibration width of the outer tub 2. For example, during the operation of the washing machine, in the transient vibration period in which the outer tub 2 resonates according to the physical properties of the entire vibration system or excessive vibration occurs due to uneven placement of the cells in the inner tub 3, Both the first and second frictional portions 130 and 140 are moved integrally with the outer tub supporting portion 110 to thereby exert a dynamic frictional force with the support rod 15. Therefore, in the transient vibration period, the vibration energy is actively dissipated by the friction action by both the first friction portion 130 and the second friction portion 140. [

On the other hand, only the first friction portion 130 performs a vibration damping function due to the friction in a section where the vibration amplitude of the outer tank 2 is sufficiently shorter than the transient vibration section (for example, the normal vibration section). That is, while the first rubbing part 130 moves along the support rod 15, the second rubbing part 140 is separated from the receiving part main body 120 at a predetermined position on the support rod 15 Can be fixed. The outer tub 2 can be relatively freely vibrated while the vibration is attenuated by the friction only by the first frictional portion 130. [

That is, the suspension 100 performs a vibration damping action by one friction portion 130 in a relatively stable section during vibration of the washing machine. However, in the transient vibration section, both of the two friction portions 130 and 140 Thereby performing a more aggressive friction damping action. That is, in the washing machine according to the present embodiment, the outer tub 2 is relatively freely moved within a predetermined allowable vibration width considering the durability of the device, permissible vibration displacement, etc., The vibration damping characteristics are different depending on the vibration width by attenuating vibration actively in order to limit the vibration width.

In order to realize vibration damping action by the first friction portion 130 and the second friction portion 140 in different manners according to the vibration width of the outer tub 2, The maximum displacement of the second frictional portion 140 should be larger than the maximum displacement of the first frictional portion 130 and preferably the first frictional portion 130 is fixed to the receiving portion main body 120, The second friction portion 140 is allowed to be displaced with respect to the receiving portion main body 120 in a space defined by the receiving portion main body 120. [

The receiving portion main body 120 has a first receiving portion 121 for receiving the first rubbing portion 130 and a second receiving portion 126 for receiving the second rubbing portion 140, The first rubbing portion 130 is fixed to the receiving portion main body 120 by the first receiving portion 121 and the space in which the second rubbing portion 140 is received is fixed to the receiving portion main body 120 by the first receiving portion 121, Is longer than the longitudinal length of the friction portion (140), thereby allowing relative movement between the receiving portion main body (120) and the second friction portion (140).

The second accommodating portion 126 may be disposed below the first accommodating portion 121. The accommodating portion main body 120 may include a partition for separating the first accommodating portion 121 and the second accommodating portion 126 121c. The support rod 15 passes through the center of the partition 121c. The first accommodating portion 121 is defined as the upper portion of the accommodating portion main body 120 and the second accommodating portion 126 is defined as the lower portion of the accommodating portion main body 120 with reference to the partition 121c.

The first accommodating portion 121 may include a tubular upper side surface portion 121b through which the support rod 15 passes. The upper side surface portion 121b extends upward of the partition 121c. The space defined by the upper side surface portion 121b and the partition 121c may contain a lubricant. The first friction member 130 may be impregnated with the lubricant depending on the material thereof and a part of the lubricant may be penetrated into the gap between the first friction member 130 and the partition 121c to reach the support rod 15 This can be done.

The first accommodating portion 121 may include a plurality of ribs 121d extending from the inner circumferential surface of the upper side surface portion 121b toward the central portion where the support rod 15 is located. The outer end of the rib 121d is connected to the inner circumferential surface of the upper side portion 121b and the lower end is connected to the upper surface of the partition 121c and the first friction member 130 is interposed between the inner end and the support rod 15 . The first friction member 130 is disposed in the space 127 defined by the inner ends of the rib 121d. Preferably, the first friction member 130 is fitted into the space 127 with a certain degree of compression, and the outer circumferential surface always maintains contact with the inner end of the rib 121d. Also, the rib 121d may be radially extended such that its inner end is converged toward the center of the upper side surface portion 121b, and the plurality of ribs 121d may be symmetrically disposed.

Since the space is formed along the circumference of the first friction member 130 and lubricant or air is contained in the space, the friction between the first friction member 130 and the support rod 15 easily dissipates heat Therefore, it is possible to prevent the first friction member 130 from being denatured by the high temperature or sticking along the support rod 15.

As shown in FIG. 5, the first accommodating portion 121 preferably has a structure in which the space accommodating the first friction member 130 is opened so that heat can be more actively radiated.

The second accommodating portion 126 may include a lower side portion extending downward from the first accommodating portion 121 and forming a space in which the second frictional portion 140 is received inward. 5, the lower side surface portion may be formed in a tubular shape extending over the front circumferential surface like the upper side surface portion 121b. Alternatively, the lower side surface portion may be formed in a transverse shape so that the space accommodating the second friction portion 140 can be ventilated As shown in Fig. The frictional heat generated by the second frictional portion 140 is discharged through the opening 126h.

The second accommodating portion 126 includes a bottom portion 124 defining a lower end of the space in which the second frictional portion 140 is accommodated and a second accommodating portion 126 having a bottom 124 and a first accommodating portion 121 And may include lower side portions 123a and 123b that connect to each other. In the present embodiment, the first lower side surface portion 123a and the second lower side surface portion 123b are provided through the opening 126h, but the present invention is not limited thereto, and an opening may be formed in the lower side surface portion itself .

The second frictional portion 140 is pushed by the receiving portion main body 120 when the vibration width of the outer tub 2 becomes a certain level or more. In the embodiment, the second friction portion 140 is pushed down by the partition 121c, and is pushed up to the bottom portion 124 and raised.

The partition 121c may include at least one protrusion 128a protruding downward from the bottom surface. The projection 128a can be formed around the hole through which the support rod 15 passes. The contact between the protrusion 128a and the upper end of the second friction portion 140 is made when the receiving portion main body 120 is moved downward. Preferably, the projection 128a is positioned so as to be in contact with the second friction member 141. [

The bottom portion 124 may include at least one protrusion 128b protruding upward from the upper surface. The projection 128b can be formed around the hole through which the support rod 15 passes. The contact between the projection 128b and the lower end of the second friction portion 140 is made when the receiving portion main body 120 is moved upward. Preferably, the projection 128b is positioned so as to be in contact with the second friction member 141. [

The structure in which the protrusions 128a and 128b are formed in the partition 121c or the bottom 124 has the effect of reducing the impact area between the receiving portion main body 120 and the second friction member 141, .

The second friction portion 140 may further include a friction member housing 142 receiving the second friction member 141 at the upper portion and the lower portion, respectively. The friction member housing 142 may include a tubular housing side surface portion 142a and a partition plate 142b that divides the space in the housing side surface portion 142a into upper and lower portions and through which the support rod 15 passes. The friction member housing 142 can receive the second friction member 141 in the upper space and the lower space separated by the partition plate 142b.

On the other hand, the receiving portion main body 120 is supported by the elastic member 150. The receiving portion main body 120 may include an outer circumferential protrusion 121a protruding outward from the lower side portions 123a and 123b and a lower end supported by the upper end of the elastic member 150. [ In the present embodiment, the outer circumferential projection 121a extends from the first receiving portion 121 to the outside of the lower side portions 123a, 123b.

In the vibration process of the outer tub 2, fine clearances may exist between the outer tub supporter 110 and the accommodating portion main body 120. For example, when the rising width of the outer tub 2 is considerably large during the vibration process or when the rising speed of the outer tub 2 is higher than the restoring speed of the elastic member 150, the outer tub supporter 110 and the accommodating sub- 120 can be finely separated. When the outer tub 2 is lowered, the outer tub supporter 110 and the receptacle main body 120 in such a separated state not only cause a collision noise but also adversely affect the durability. In order to solve such a problem, the suspension 100 may further include a buffer member 180 interposed between the supporter supporting portion 110 and the receiving portion main body 120. The buffer member 180 may be made of a porous fiber material or an elastic material such as rubber.

The buffer member 180 may have an opening 181 communicating with the inside of the first accommodating portion 121. In this case, heat generated by the first friction member 130 is discharged through the opening portion 181. The opening 181 may be located in a region corresponding to between the adjacent ribs 121d.

7 illustrates a suspension according to another embodiment of the present invention. 8 is a partial exploded view of the suspension shown in Fig. Particularly, in FIG. 8, the first accommodating portion 221 is shown with the first friction member 130 removed.

7 to 8, the suspension 200 may include a supporter 210 and a receiver main body 220, 270. The outer tub supporting portion 210 has substantially the same structure as that of the outer tub supporting portion 210 according to the above-described embodiment, which is described above, and a detailed description thereof will be omitted.

The accommodating portion main body 270 includes a first accommodating portion forming portion 220 forming the first accommodating portion 221 and a first accommodating portion forming portion 220 inserted into the first accommodating portion forming portion 220 And a second accommodating part forming part 270 forming a space in which the second frictional part 140 is accommodated between the second accommodating part forming part 220 and the second accommodating part forming part 270. That is, in this embodiment, the second receiving portion 226 receiving the second frictional portion 140 is formed by the first receiving portion forming portion 220 and the second receiving portion forming portion 270. The partition 121c is formed in the first accommodating portion forming portion 220 and the first accommodating portion 121 corresponding to the upper portion of the partition 121c is formed substantially in the first accommodating portion 121 in the above- .

The depressed portion 223 depressed upward is formed in the lower portion of the first accommodating portion forming portion 220 and the second rubbing portion 140 can be positioned to the inner side of the depressed portion 223 in the vibration process. Of course, a space in which the depressed portion 223 is not formed in the first accommodating portion forming portion 220 and in which the second frictional portion 140 is accommodated may be formed only in the second accommodating portion forming portion 270, The maximum displacement of the second frictional portion 140 with respect to the second accommodating portion forming portion 270 is reduced as compared with the present embodiment.

The second accommodating portion forming portion 270 has an upper side surface portion 271 protruding outward from the lower side surface portion 273 and has an abutment end surface 272 corresponding to the difference in outer diameter between the upper side surface portion 271 and the lower side surface portion 273, Is supported by the elastic member (150). The second bearing portion forming portion 270 is formed with a partition 224 on which the first friction member 130 is seated and the partition 224 is formed downward toward the space in which the second friction portion 140 is accommodated And may include protruding protrusions 228. The bottom portion 274 of the second accommodating portion forming portion 270 may include a protrusion 278 protruding upward toward the space in which the second frictional portion 140 is accommodated. These projections 228 and 278 are in contact with the second friction member 141 like the projections 128a and 128b in the above-described embodiment.

On the other hand, in the first receiving portion 221, a plurality of radial projections 121d converging toward the central portion through which the support rod 15 passes may be formed at the inner end, as in the above-described embodiment. The first accommodating portion 221 has substantially the same structure as that of the first accommodating portion 121 according to the above embodiment except that the first accommodating portion 221 is formed independently of the second accommodating portion forming portion 270 in this embodiment, There is a difference in that it is provided in the forming portion 220.

9 shows (a) a suspension according to another embodiment of the present invention, (b) a friction member applied thereto, and (c) a housing body. 9, the suspension 300 according to another embodiment of the present invention has a structure similar to that of the suspension 100 according to the above-described embodiment, and includes a supporter 310, an accommodating portion main body 320, An elastic member 150, and a second friction member 340. The receiving portion main body 320 includes a first receiving portion 321 and a second receiving portion 326. Although not shown in FIG. 9, the first receiving portion 321 receives the first frictional portion 130 (see FIG. 4).

The first accommodating portion 321 includes a plurality of first ribs 121b extending from an inner circumferential surface 321a defining a side surface of the space in which the first friction member 130 is accommodated to a central portion where the support rod 15 is located, And an upper surface of the partition 121c that separates the first accommodating portion 321 and the second accommodating portion 326 from each other, that is, the first friction member 130 protruding from the bottom surface of the first accommodating portion 321 And a plurality of second ribs 121d that support the first ribs 121d. The first rib 121b is in contact with the outer circumferential surface of the first friction member 130 and the second rib 121d is in contact with the lower end of the first friction member 130. [

The second rib 121d may extend further than the first rib 121d toward the central portion. An annular rib 321e can be protruded around the perforations formed in the partition 321c so that the support rod 15 passes therethrough and in this case the second rib 121d can extend to the annular rib 321e have.

A predetermined gap is formed between the bottom surface of the first accommodating portion 121 and the first friction member 130 by the second rib 121d so that the lubricant injected into the first accommodating portion 121 May move downward along the first ribs 121d and may be located between the second ribs 121d. The first friction member 130 may be made of porous fibrous material for excellent absorbency.

The second frictional portion 340 may include a cylindrical frictional member 341 into which the support rod 15 is inserted and a tubular friction member housing 342 in which the frictional member 341 is received. The upper and lower ends of the friction member 341 protrude outward of the friction member housing 342 and are in contact with the projections 128a and 128b, respectively, during the movement.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

Claims (20)

Casing;
The wash tank contains the outer tank;
A support rod having one end connected to the casing and the other end having a support end;
A first frictional portion and a second frictional portion movably provided along the support rod to exert frictional force with the support rod;
A first accommodating portion which is movably provided along the support rod and in which the first frictional portion is fixedly disposed and a second accommodating portion which accommodates the second frictional portion, the accommodating portion being displaceable with respect to the second frictional portion, main body;
An outer tub supporting part formed independently from the receiving part main body and movable along the support rod and supporting the outer tub from above the receiving part; And
And an elastic member supported by the support end and resiliently supporting the receiving portion main body. The method according to claim 1,
The receiving portion main body includes:
And a partition for partitioning the first accommodating portion and the second accommodating portion,
Wherein the first accommodating portion includes:
A tubular upper side portion extending upward from the partition and having the support rod at its center; And
And a plurality of ribs protruding from the inner circumferential surface of the upper side surface portion toward the center and forming an interval in which the first friction portion is received between the support rod and the inner circumferential surface of the upper side surface portion. 3. The method of claim 2,
And a lower end of the rib is connected to the partition. 3. The method of claim 2,
Wherein the first friction portion comprises:
And a friction member whose one surface is in contact with the support rod and whose other surface opposite to the one surface is pressed by an inner end of the rib facing the center. 5. The method of claim 4,
Wherein the friction member is made of a fibrous material having pores. 3. The method of claim 2,
Wherein a gap for containing a lubricant is formed between the plurality of ribs. The method according to claim 6,
Wherein the plurality of ribs are disposed radially. The method according to claim 1,
Wherein the outer tub supporting portion comprises:
And is detachably provided to the receiving portion main body. 9. The method of claim 8,
And the inside of the first accommodating portion is exposed to the outside in a state where the supporter supporting portion is separated from the accommodating portion main body. The method according to claim 1,
The receiving portion main body includes:
And an opening portion that is laterally opened to expose the inside of the second accommodating portion to the outside. The method according to claim 1,
And a cushioning member interposed between the outer tub supporting portion and the receiving portion main body. 12. The method of claim 11,
The cushioning member,
And an opening communicating with the inside of the first accommodating portion. 13. The method of claim 12,
Wherein the first accommodating portion includes:
And a plurality of ribs extending toward a central portion through which the support rod passes,
And the opening is positioned to correspond to the gap between the ribs. 12. The method of claim 11,
Wherein the buffer member is made of an elastic material. The method according to claim 1,
The receiving portion main body includes:
A first receiving portion forming portion forming the first receiving portion; And
And a second accommodating portion forming portion coupled to the first accommodating portion forming portion and forming a second accommodating portion below the first accommodating portion forming portion. 16. The method of claim 15,
Wherein the first accommodating portion forming portion comprises:
And is seated in the second accommodating portion forming portion. 17. The method of claim 16,
Wherein the elastic member elastically supports the second accommodating portion forming portion. 16. The method of claim 15,
The second accommodating portion includes:
Wherein at least a part of the first accommodating portion is formed in the first accommodating portion forming portion. The method according to claim 1,
The second accommodating portion includes:
And a projection projecting toward a space in which the second friction portion is disposed. Casing;
The wash tank contains the outer tank;
A support rod having one end connected to the casing and the other end having a support end;
A first frictional portion and a second frictional portion movably provided along the support rod to exert frictional force with the support rod;
A support for supporting the outer tank, the outer tank supporting member being movable along the support rod; And
And a receiving portion body provided below the outer tub supporting portion and movable along the support rod to provide a space for accommodating the first friction portion and the second friction portion,
Wherein the space in which the first friction portion is accommodated is opened at an upper portion opposed to the outer tub supporting portion in a state in which the outer tub supporting portion is separated from the receiving portion main body.

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