KR20050069877A - Drum-brush and vacuum cleaner having the same - Google Patents

Abstract

The drum brush according to the present invention includes a drum rotating body, a bearing holder, a bearing, a rotating shaft, an end cap, and a pressure ring. A sole member is implanted in the drum rotating body, and a pair of bearing holders are provided to be coupled to both ends of the drum rotating body, or are integrally formed at both ends of the drum rotating body. The bearing consists of an inner ring and an outer ring, and a pair is provided to be coupled to each bearing holder. The rotating shaft penetrates the inner ring of each bearing so that both ends thereof are coupled to each of the pair of end caps. The pressure ring is interposed between the bearing holder and the bearing to prevent the outer ring from rotating. Therefore, even if the drum rotating body rotates, the damage caused by the friction between the bearing holder and the bearing does not occur.

Description

Drum brush and vacuum cleaner having same {Drum-brush and vacuum cleaner having the same}

The present invention relates to a vacuum cleaner, and more particularly, to a drum brush having an improved structure and a vacuum cleaner having the same.

In general, a vacuum cleaner is a device for sucking and removing dust and foreign substances on the cleaning surface by using a high vacuum pressure generated therein, and there are various types such as an upright type, a canister type, and a stick type depending on the appearance.

Figure 1 schematically shows an upright vacuum cleaner as an example of a conventional vacuum cleaner. As shown, the conventional upright type vacuum cleaner includes a cleaner body 10 having a dust collecting chamber 10a and a motor driving chamber, and a suction inlet body 20 coupled to a lower portion of the cleaner body 10. Here, the dust collecting chamber 10a communicates with the motor driving chamber and the suction opening 20a, and a dust bag for filtering dust is mounted therein. In addition, a suction motor 40 for generating a vacuum pressure is installed in the motor driving chamber. When the suction motor 40 is driven, a vacuum pressure is generated in the dust collecting chamber 10a, and air containing dust is sucked into the dust bag in the dust collecting chamber 10a through the suction port 20a. Subsequently, the air exits the dust bag, passes through the motor drive room, and then is discharged to the exhaust part 11, and dust is collected in the dust bag.

On the other hand, inside the housing 21 of the inlet port 20, the drum brush 100 is installed to be located above the inlet 20a. The drum brush 100 is used to scrape dust and dirt attached to the cleaning surface and is rotated by a driving source such as a motor or a turbine device provided in the suction port 20.

As shown in FIG. 2, the drum brush 100 includes a drum rotating body 110, a bearing holder 120, a bearing 130, a rotating shaft 140, and an end cap 150. do. The drum rotating body 110 has a brush member 111 is helically implanted on its outer circumferential surface, the drive belt 30 is connected to one side of the outer circumferential surface. The bearing holder 120 is inserted into and fixed to both ends of the drum rotating body 110, and a washer 160 is inserted into the bearing holder 120. The bearing 130 is composed of an outer ring 131 and an inner ring 132. The rotating shaft 140 is inserted into the inner ring 132 of the bearing 130 across the end of the drum rotating body 110. End cap 150 is coupled to both ends of the drum rotating body 110, the coupling hole 150a is formed in the center is coupled to the end of the rotary shaft 140.

In addition, as shown in FIG. 3, the end cap 150 is coupled to the housing 21, and the rotary shaft 140 press-fitted into the inner ring 132 is coupled to the end cap 150. Accordingly, the end cap 150, the rotation shaft 140, and the inner ring 132 form a fixed assembly fixed to the housing 21, and the outer ring 131, the bearing holder 120, and the drum rotating body 110 are rotated assemblies. To achieve. Here, the washer 160 inserted into the bearing holder 120 fixes the outer ring 131 of the bearing 130 to the bearing holder 120. Therefore, when the driving belt 30 (see FIG. 1) is operated, the drum rotating body 110, the bearing holder 120, and the outer ring 131 rotate about the rotating shaft 140.

However, in the conventional drum brush 100 having such a configuration, the outer ring 131 of the bearing 130 is in contact with the inner circumferential surface of the bearing holder 120 by vibration generated when the drum rotating body 110 rotates. Can be rotated. Therefore, friction heat is generated between the bearing holder 120 and the outer ring 131, so that the bearing holder 120 made of a plastic material may be worn and damaged when used for a long time, and rocking may occur in the rotating drum rotating body 110. have.

The present invention has been made in view of the above problems, it is to provide a drum brush and a vacuum cleaner having the same to prevent the bearing holder is broken by preventing the outer ring of the bearing inserted into the bearing holder to rotate. There is this.

The drum brush according to the present invention for achieving the above object includes a drum rotating body, a bearing holder, a bearing, a rotating shaft, an end cap, and a pressure ring. A brush member is implanted in the drum rotating body, and a bearing holder is coupled to an end of the drum rotating body. The bearing consists of an inner ring and an outer ring and is coupled to each bearing holder. The rotating shaft passes through the inner ring of each bearing and its end is coupled to the end cap. The pressure ring is interposed between the bearing holder and the bearing to prevent the outer ring from rotating.

Here, it is more preferable in that the drum rotor and the bearing holder are integrally formed to further reduce the number of parts and reduce the number of working hours.

In the drum brush according to the present invention having the above configuration, the pressing ring may include a body plate and at least one pressing protrusion formed to protrude from the body plate.

Here, the pressing protrusion may protrude toward the inner circumferential surface side of the pressing ring.

And, the outer circumferential surface of the pressing ring is preferably provided so that the fixing projections.

In addition, the pressure ring is preferably made of stainless steel.

In addition, the bearing holder may have a fixed rib in close contact with the outer ring of the bearing therein.

In addition, a locking groove may be formed inside each end of the drum rotating body, and a locking protrusion inserted into the locking groove may be formed at an outer circumference of the bearing holder.

On the other hand, the object includes a vacuum cleaner for generating a suction force and a vacuum cleaner body having a dust collecting chamber dust is collected, a suction port having a suction port connected to the dust collection chamber and a drum brush rotatably installed on the suction port. As a vacuum cleaner, the drum brush is also achieved by a vacuum cleaner including a drum rotating body, a bearing holder, a bearing, a rotating shaft, an end cap, and a pressure ring. Here, the pressing ring is interposed between the bearing holder and the bearing to prevent the outer ring of the bearing from rotating.

In addition, it is more preferable that the drum rotating body and the bearing holder are integrally formed to reduce the number of parts and the number of working hours.

Hereinafter, with reference to the accompanying drawings will be described a drum brush and a vacuum cleaner having the same according to a preferred embodiment of the present invention. For reference, in describing the present invention, the same reference numerals refer to the same parts as those in the related art.

As shown in FIG. 4, the drum brush 200 according to the preferred embodiment of the present invention includes a drum rotating body 210, a bearing holder 220, a bearing 230, a rotating shaft 240, and an end cap 250. ) And a pressure ring 260. Here, the bearing holder 220, the bearing 230, the rotating shaft 240, the end cap 250 and the pressure ring 260 is provided with a pair, one each at each end of the drum rotating body (210). Since both are combined in the same structure with the same configuration, only one component provided at one end of the drum rotating body 210 will be described below.

The drum rotating body 210 is provided with a brush member 211 in a diagonal direction to scrape the dust of the cleaning surface on the outer peripheral surface. Then, a locking groove 212 is formed inside the end of the drum rotating body 210. The number of the locking grooves 212 is at least one, two, three, or as shown in Figure 4, a plurality may be provided. When a plurality of locking grooves 212 are provided, the arrangement intervals of each of these locking grooves may be the same. In addition, the belt coupling portion 213 is provided on one side of the outer circumferential surface of the drum rotating body 210. The belt coupling portion 213 is coupled to the drive belt 30 (see Fig. 1) for transmitting the rotational driving force to the drum rotating body (210).

The bearing holder 220 is installed at each end of the drum rotating body 210. At least one locking protrusion 221 corresponding to the locking groove 212 of the drum rotating body 210 is provided outside the bearing holder 220. The inside of the bearing holder 220 is provided with a fixed rib 222 (see FIG. 6) in close contact with the bearing 230. The fixed rib 222 is in close contact with the outer ring 231 of the bearing 230 to increase the coupling force between the bearing holder 220 and the outer ring 231.

The bearing 230 includes an outer ring 231 and an inner ring 232, and is mounted on a bearing holder 220 coupled to an end of the drum rotating body 210.

The rotating shaft 240 is installed inside the drum rotating body 210 so that the end thereof protrudes out of the drum rotating body 210. A first knurling portion 241 is provided at the end of the rotation shaft 240. As shown in FIG. 6, the rotation shaft 240 is pressed into the inner ring 232 of the bearing 230, and an end thereof protrudes from the inner ring 232 to be coupled to the end cap 250.

The end cap 250 covers the end of the drum rotating body 210 and supports the inner ring 232 and the rotating shaft 240 of the bearing 230. The boss portion 251 (see FIG. 6) is provided at the center of the end cap 250 so as to protrude inward, and the boss portion 251 is provided with a coupling hole 251a into which an end of the rotation shaft 240 is inserted. The inner circumferential surface of the boss portion 251 is provided with a second knurling portion 252 corresponding to the first knurling portion 241 of the rotation shaft 240. When the rotary shaft 240 is inserted into the coupling hole (251a), the second knurled portion 252 is in close contact with the first knurled portion 241, the rotary shaft 240 is fixed to the end cap 250. In addition, the boss 251 is in close contact with the inner ring 232 of the bearing 230.

As shown in FIG. 5, the pressing ring 260 is a ring-shaped body plate 261 in which a narrow and elongated metal plate is bent and a pressing protrusion 262 protruding toward an inner circumferential surface side of the body plate 261. It is made, including. The pressing protrusion 262 may be formed by pressing the body plate 261, and may have other shapes such as a triangular shape, a circular shape, and the like rather than a rectangular shape as illustrated. In addition, the fixing protrusion 263 is formed on the outer circumferential surface of the body plate 261. The fixing protrusion 263 may also be formed by pressing the body plate 261. The pressure ring 260 may be made of stainless steel having high strength and good corrosion resistance to oil leaking from the bearing 230.

In addition, the pressing ring 260 is interposed between the bearing holder 220 and the outer ring 231, as shown in Figure 6, so that the outer ring 231 of the bearing 230 is fixed to the bearing holder 220 . Since the fixing protrusion 263 (see FIG. 5) of the pressing ring 260 is in close contact with the inner circumferential surface of the bearing holder 220, the pressing ring 260 may not be easily separated from the bearing holder 220.

On the other hand, according to another embodiment of the present invention, as shown in Figure 7 and 8, the bearing holder may be integrally formed on the drum rotating body. The same components as those of the preferred embodiment of the present invention will be described with the same reference numerals.

As shown in FIG. 7, the drum brush 300 according to another embodiment of the present invention includes a drum rotating body 310, a bearing holder 320, a bearing 230, a rotating shaft 240, and an end cap 250. ) And a pressure ring 260. The bearing holder 320 is integrally formed at both ends of the drum rotating body 310 to support the outer ring of the bearing 230. The inside of the bearing holder 320 is provided with a fixed rib 322 (see FIG. 8) in close contact with the bearing 230. The fixed rib 222 is in close contact with the outer ring 231 of the bearing 230 to increase the coupling force between the bearing holder 220 and the outer ring 231.

The drum brushes 200 and 300 made of the above components are installed in the housing 21 of the suction port 20 (see FIG. 1) after the assembly is completed. 6 and 8, the end cap 250 is fixed to the housing 21, and the sole member 211 protrudes outside the inlet 20a (see FIG. 1) below the housing 21. do. As the end cap 250 is fixed, the rotation shaft 240 and the inner ring 232 are also fixed together with the end cap 250. In contrast, the outer ring 231, the bearing holders 220, 320, and the drum rotating body 210 and 310 form one rotation assembly, and are rotatable about the rotation shaft 240.

When the cleaning operation is performed, the suction motor 40 (see FIG. 1) installed inside the cleaner body 10 (see FIG. 1) is driven to generate a vacuum pressure in the dust collecting chamber. In addition, the drum rotating body (210, 310) is rotated by receiving a driving force from a motor or a turbine device provided in the suction port body 20 (see Fig. 1) of the vacuum cleaner through the drive belt 30 (see Fig. 1) do. At this time, the dust adhering to the cleaning surface of the lower portion of the suction port 20a is removed by being sucked into the suction port 20a while being shaken off by the brush member 211 of the drum rotating body 210 and 310.

When the drum rotors 210 and 310 rotate, the pressure ring 260 interposed between the bearing holders 220 and 320 and the outer ring 231 prevents the outer ring 231 of the bearing 230 from rotating. do. Accordingly, the rotation of the drum rotors 210 and 310 is stable.

According to the present invention as described above, the pressure ring is interposed between the bearing holder and the bearing to prevent the outer ring of the bearing from rotating. Therefore, the problem that the bearing holder is worn or broken when the drum rotating body rotates as in the prior art does not occur.

In addition, according to the present invention, when the drum rotating body rotates, it is possible to quietly rotate without causing fluctuations.

On the other hand, according to another embodiment of the present invention, since the bearing holder is integrally formed on the drum rotating body, the number of parts is reduced, thus reducing the labor time, thereby improving the productivity of the drum brush.

While the invention has been shown and described with respect to preferred embodiments for illustrating the principles of the invention, the invention is not limited to the construction and operation as shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

1 is a perspective view schematically showing a general upright vacuum cleaner;

Figure 2 is an exploded perspective view schematically showing a conventional drum brush,

3 is an assembled cross-sectional view of FIG.

Figure 4 is an exploded perspective view schematically showing a drum brush according to a preferred embodiment of the present invention,

5 is a perspective view showing an extract of the fixing ring of the drum brush according to a preferred embodiment of the present invention,

6 is an assembled cross-sectional view of the drum brush according to a preferred embodiment of the present invention;

7 is an exploded perspective view schematically showing a drum brush according to another embodiment of the present invention, and

8 is an assembled cross-sectional view of the drum brush according to another embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

200; Drum Brush 210; Drum Rotator

211; brush member 212; locking groove

213; belt coupling portion 220; bearing holder

221; locking protrusion 222; fixed rib

230; bearing 231; outer ring

232; inner ring 240; rotating shaft

241; first knurled portion 250; end cap

251; boss portion 252; second knurling portion

260; retaining ring 261; body plate

262; pressing protrusion 263; fixed protrusion

Claims (16)

A drum rotating body in which the brush member is implanted; A bearing holder installed at an end of the drum rotating body; A bearing installed inside the bearing holder, the bearing including an outer ring and an inner ring; A rotating shaft inserted into the inner ring of the bearing; An end cap coupled to and supported by an end of the rotation shaft; And And a pressing ring interposed between the bearing holder and the bearing. The method of claim 1, The bearing holder is a drum brush, characterized in that formed integrally with the drum rotating body. The method according to claim 1 or 2, The pressure ring, Body plate; And And at least one pressing protrusion formed to protrude from the body plate. The method of claim 3, wherein The pressing protrusion is a drum brush, characterized in that protruding toward the inner peripheral surface side of the pressing ring. The method of claim 1, Drum brush further comprising at least one fixing protrusion protruding toward the outer peripheral surface side of the pressing ring. The method of claim 1, The pressure ring is a drum brush, characterized in that made of stainless steel. The method of claim 1, The bearing holder is a drum brush, characterized in that it has a fixed rib in close contact with the outer ring of the bearing therein. The method of claim 1, Locking groove is formed inside the end of the drum rotating body, the drum brush characterized in that the locking projection is inserted into the locking groove on the outer circumference of the bearing holder. In a vacuum cleaner comprising a vacuum cleaner for generating a suction force and a vacuum cleaner body having a dust collecting chamber for collecting dust, an inlet having a suction port connected to the dust collecting chamber, and a drum brush rotatably installed on the suction opening. The drum brush, A drum rotating body in which the brush member is implanted; A bearing holder installed at an end of the drum rotating body; A bearing installed inside the bearing holder, the bearing including an outer ring and an inner ring; A rotating shaft inserted into the inner ring of the bearing; An end cap coupled to the end of the rotation shaft and coupled to the suction port; And And a pressing ring interposed between the bearing holder and the bearing. The method of claim 9, The bearing holder is a vacuum cleaner, characterized in that formed integrally with the drum rotating body. The method according to claim 9 or 10, The pressure ring, Body plate; And And at least one pressing protrusion formed to protrude from the body plate. The method of claim 11, The pressing protrusion is a vacuum cleaner, characterized in that protruding toward the inner peripheral surface side of the pressing ring. The method of claim 9, Vacuum cleaner further comprises at least one fixing protrusion protruding toward the outer peripheral surface side of the pressing ring. The method of claim 9, The pressure ring is a vacuum cleaner, characterized in that made of stainless steel. The method of claim 9, The bearing holder is a vacuum cleaner, characterized in that it has a fixed rib in close contact with the outer ring of the bearing. The method of claim 9, A locking groove is formed in each end of the drum rotating body, and a locking protrusion is inserted into the locking groove on the outer circumference of the bearing holder.