JP2520708B2 - Vacuum cleaner suction body - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a suction port body of an electric vacuum cleaner having a rotating body that is rotated by a drive source.

(Prior Art) An example of a conventional suction port body will be described with reference to FIG.
Reference numeral 1 denotes a rotating body, which is composed of a base 2 in which brush bristles are planted, and a brush base 3 fixed to the base 2 by press fitting and adhesion. The brush bristles 4 are planted on the brush base 3. Further, there is provided a shaft 5 which penetrates the brush base 3 and has one end press-fitted into the base 2, and the shaft 5 is prevented from coming off by a knurl 6 and is prevented from rotating. Axis 5
The other end of the is protruded from the brush base 3, a cylindrical oil-impregnated metal 8 is rotatably fitted through a washer 7, and a square pole bearing 9 is rotatably covered with the oil-impregnated metal 8. It is fitted. Further, the rotating body 1 is provided with brush bristles 4 that are inclined obliquely outward so that the tips are located around the bearing 9. A bearing support portion 11 that supports the bearing 9 is formed on the main body 10 of the suction port body. Reference numeral 12 is a suction groove formed on the lower surface of the main body 10. The rotary body 1 of the suction port body configured as described above is rotated by the drive source via the transmission belt.

(Problems to be Solved by the Invention) In such a suction port body, the rotating body rotates and the brush bristles pick up lint, hair, dust such as cotton dust, and sucks the dust from the suction port. . At this time, since the brush bristles inclined outward are provided so as to be located around the bearing in order to scrape out the dust below the bearing, the dust is likely to be caught in the bearing. If dust is caught in the bearing, the bearing will not rotate and the dust will not rotate.

On the other hand, since the rotating body is rotated by the drive source and the rotation is high speed, high heat is generated due to friction between the dust and the rotating body, and the temperature thereof reaches 200 ° C. or higher.

On the other hand, the rotor is generally made of synthetic resin such as nylon, and these begin to soften at about 80 ° C. Therefore, when the rotating body is rotated, there is a problem that the surface of the rotating body is softened and deformed due to the frictional heat between the dust and the rotating body.

An object of the present invention is to solve the above problems and improve the durability of the suction port body of the electronic vacuum cleaner.

[Structure of Invention]

(Means for Solving the Problem) The suction port body of the electric vacuum cleaner according to the present invention includes a suction port main body having a suction port formed on the bottom surface, and an elastic member rotatably supported in the main body facing the suction port. A rotary body made of synthetic resin having a projecting piece provided on its peripheral surface, a bearing supported by a bearing support portion formed on the main body and rotatably supporting both ends of the rotary body, and provided inside the main body. A drive source that rotationally drives the rotating body, and an inclined elastic protrusion that is provided on at least one end peripheral surface of the rotating body and has a tip inclined outward in the axial direction of the rotating body and located around the bearing. And a heat-resistant protective member is provided to cover the bearing side of the end portion of the rotating body on which the inclined elastic protruding piece is provided, and the heat-resistant protective member has one end attached to the rotary body and the other end. Side is axial direction than the end of the rotating body It comprises a peripheral surface portion projecting outward and an end surface portion which is provided continuously with the other end portion of the peripheral surface portion and which extends radially inward and is separated from the rotary body end portion.

(Operation) The suction port body of the electric vacuum cleaner according to the present invention scrapes out dust by the elastic projection piece that rotates the rotating body by the drive source when cleaning the carpet or the like. If dust is caught on the bearing during cleaning, and the rotating body rotates at high speed in that state, friction heat is generated between the dust entangled on the bearing and the end surface of the heat-resistant protective member. It is separated from the end surface of the heat resistant protection member, and the rotating body is reliably protected from this frictional heat.

Example An example of the present invention will be described with reference to the drawings. 21 is a suction port body having an electric motor (not shown) as a drive source,
By connecting the connecting pipe 2 to an extension pipe (not shown) or the like, the connecting pipe 2 is connected to an electric vacuum cleaner body not shown. Body 21
A suction port 23 is formed in the center of the bottom surface of the
A suction groove 24 extending from to the outer surface of the main body 21 is provided. A bumper 25 is provided on the outer periphery of the main body 21. Reference numeral 26 denotes a rotating body that is rotatably supported in the main body 21 so as to face the suction port 23, and includes a beater 27, a base 29 on which brush bristles 28 are formed as elastic protruding pieces, and a bearing that projects obliquely outward at one end. And a brush base 30 having brush bristles 28 as inclined elastic projection pieces provided so as to be located around 35. In addition,
The elastic protruding piece may be made of soft vinyl chloride or the like.

In FIG. 2, 31 is a shaft whose one end is press-fitted into the base 29,
The shaft 31 penetrates the brush base 30 fixed to the base 29 by press fitting and bonding, and is prevented from coming off by the knurls 32 and is prevented from rotating. A cylindrical oil-impregnated metal 34 is rotatably fitted to a shaft 31 protruding from the brush base 30 via a washer (A) 33, and a quadratic prism-shaped bearing 35 is fitted to cover the oil-impregnated metal 34. ing. The respective end surfaces of the bearing 35 and the brush base 30 that face each other are, as shown in the drawing,
The diameter of the bearing 35 is smaller than the diameter of the brush base 30.

A flange portion 36 is formed on the bearing 35, and a washer (B) 37 is provided so as to be mounted on the flange portion 36. The washer (B) 37 is composed of two washers, a metal inside and a felt outside, and covers the gap between the brush base 30 and the bearing 35 to prevent dust from entering the gap. Therefore, frictional heat is not generated in this gap.

Reference numeral 38 denotes an iron plate that covers the end of the brush base 30 as a heat resistant protection member, and is composed of a peripheral surface portion and an end surface portion continuous with this peripheral surface portion, and is provided so as to cover the washer (B) 37. One end side of the peripheral surface part is fixed by bending a claw 40 into a recess 39 formed on the outer peripheral surface of the brush base 30, and the other end side is axially outward from the end part of the brush base 30. It is protruding. Then, an end surface portion that continuously extends inward in the radial direction is formed on the other end side, and this end surface portion is separated from the end portion of the brush base 30. A through hole 41 is provided in the center of the iron plate 38, and the bearing 35 projects from the through hole 41. On the other hand, the main body 21 is provided with a bearing support portion 42 and supports the bearing 35.

The operation will be described based on the above configuration. When cleaning a carpet or the like, the connection pipe 22 is connected to the main body of the electric vacuum cleaner via an extension pipe or the like (not shown) for cleaning. At this time, the rotating body 26 is rotated by a drive source (not shown), the dust is picked up by the brush bristles 28, and the dust is sucked. As the cleaning is performed in this manner, dust such as hair scraps, hair, and cotton dust is entangled around the bearing 35. Since the brush bristles 28 that project obliquely outwardly of the brush base 30 are provided in order to scrape out the dust below the bearing 35, the bearing 35
It is easy for dust to get caught in.

When the rotating body 26 is rotated with the dust clinging to the bearing 35, the dust clinging to the bearing 35 does not rotate, but the rotating body 26 rotates, so the dust and the rotating body 26 are rotated.
Friction heat is generated by the contact with the end surface portion of the iron plate 38 provided at the end portion of the. However, as described above, since the iron plate 38 as the heat resistant protection member is provided, frictional heat is generated, but since the iron plate 38 is cooled by the suction air from the suction port 23, the temperature rise of the iron plate 38 is prevented. However, since the rotating body 26 does not reach a high temperature, it is possible to prevent the brush base 30 from being softened and deformed. In addition, the iron plate 38 where frictional heat is generated
Since the end face of is separated from the brush base 30,
It is possible to reliably prevent heat from being transferred to the. Therefore, the durability of the suction port body is improved.

In this embodiment, the washer (B) 37 is provided between the rotating body 26 and the heat resistant protection member, but a space may be formed in this portion without providing the washer (B) 37. Further, the rotating body 26 may be directly provided with a heat-resistant protective member such as glass.

(Effects of the Invention) As described above, according to the suction port body of the vacuum cleaner of the present invention, dust is entangled in the bearing of the rotating body and frictional heat is generated between the dust and the heat-resistant protective member. However, since the heat-resistant protective member protects against heat, the rotating body can be prevented from being softened and deformed, and the durability of the suction port body is improved.

[Brief description of drawings]

FIG. 1 is a plan view showing a suction port body of the present invention, FIG. 2 is a sectional view of a main part thereof, and FIG. 3 is a sectional view of a main part of a conventional suction port body. 21 …… Main body, 23 …… Suction port 26 …… Rotating body, 28 …… Brush bristles (elastic protruding pieces) 35 …… Bearing, 38 …… Steel plate (heat resistant protection member)

Claims (1)

(57) [Claims] 1. A suction port main body having a suction port formed on a bottom surface, and a synthetic resin rotary body having an elastic projection piece rotatably supported in the main body facing the suction port and provided on a peripheral surface thereof. A bearing supported by a bearing support portion formed in the main body and rotatably supporting both ends of the rotary body; a drive source provided in the main body for rotationally driving the rotary body; and at least the rotary body. An inclined elastic projection piece that is provided on one end peripheral surface and that is inclined toward the outside in the axial direction of the rotating body and is located around the bearing, and the inclined elastic projection piece of the rotating body is provided. A heat-resistant protective member is provided so as to cover the end side of the bearing, and one end of the heat-resistant protective member is attached to the rotating body, and the other end of the heat-resistant protective member protrudes outward in the axial direction from the end of the rotating body. Continuing on the surface and the other end of this peripheral surface Suction port body of the electric vacuum cleaner, characterized in that it consists of the end surface portion spaced from said rotary body end extending radially inward provided.