JP2004283405A - Suction head of vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction head of a vacuum cleaner wherein hair or the like coiling around a rotating brush is prevented to invade into a bearing to clasp a supporting shaft. <P>SOLUTION: The suction head includes a bottom casing 2 having a suction aperture 3, the rotating brush 30 which is equipped with two or more rotating cleaners on a peripheral surface in a longitudinal direction and is rotatably supported in the bottom casing 2 to rotate by introduced air flow, an upper casing 5 which covers the upper surface of the bottom casing 2 and a connection pipe which is held between the bottom casing 2 and the upper casing 5, wherein supporting rings 50a and 50b are fixed at both the end sides of the rotating brush 30, the bearing 61 which supports the supporting rings 50 is held between the bottom casing 2 and the upper casing 5, and the connection between the bearing 61 and the supporting rings 50a and 50b has labyrinth structure. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a suction device of a vacuum cleaner, and more particularly, to a suction device of a vacuum cleaner that rotates a rotating brush by a suctioned air flow.
[0002]
[Prior art]
A conventional vacuum cleaner suction port body (suction implement) is provided with a suction port through which outside air can flow in, apart from a dust suction opening. The inside of the rotary cleaning body is hollow, and a longitudinal direction of a substantially cylindrical surface of the rotary cleaning body is provided. A plurality of blades extending to a substantially cylindrical surface and having a rotary opening penetrating between the adjacent blades penetrating the inside of the rotary cleaning body, In some cases, the intake air that flows in rotates the rotary cleaning body from inside the rotary cleaning body through a rotary opening (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-11-128128 (pages 2-3, FIGS. 1 and 2)
[0004]
[Problems to be solved by the invention]
In the suction port body described in Patent Document 1, the gap between the support ring of the rotary cleaning body and the case main body is formed in a rib shape, and the gap between the bearing and the rotary shaft is in the direction of the rotary cleaning body. When the hair is wound around the end of the rotating cleaning body, the hair tends to penetrate in the direction of the rotating shaft, and the hair is directly entangled with the rotating shaft and the rotation of the rotating cleaning body becomes unstable. there were.
[0005]
The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a suction device for a vacuum cleaner in which hair or the like wound around a rotating brush does not enter a bearing and become entangled with a support shaft. It was done.
[0006]
[Means for Solving the Problems]
The suction tool of the vacuum cleaner according to the present invention includes a lower case having a suction port, and a plurality of rotating cleaning bodies mounted in a longitudinal direction of an outer peripheral surface, and an air flow introduced while being rotatably supported in the lower case. A support brush is fixed to both ends of the rotating brush in a suction device including a rotating brush rotated by the rotating case, an upper case covering an upper portion of the lower case, and a connection pipe sandwiched between the lower case and the upper case. In addition, a bearing for supporting the support ring is sandwiched between the lower case and the upper case, and a connecting portion between the bearing and the support ring has a labyrinth structure.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a bottom view of a suction tool of a vacuum cleaner according to one embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is an exploded perspective view of FIG.
A suction tool 1 (hereinafter, sometimes referred to as a main body) is long in the left-right direction and has a lower case 2 having a suction port 3 in a longitudinal direction of a lower surface, and a front upper case which is divided into front and rear to cover an upper surface of the lower case 2. 4 and a rear upper case 5, a connection pipe 6 sandwiched between the lower case 2 and the rear upper case 5, and a bumper 7 provided on a part of the front and side surfaces of the lower case 2 to protect the main body 1. , A rotating brush 30 rotatably supported between the lower case 2 and the front and rear upper cases 4 and 5.
[0008]
On both sides on the front side of the lower case 2, a raised cloth 9 is mounted on a raised cloth mounting section 8 provided from below to the bottom of the bumper 7, and at a predetermined interval between the raised cloth mounting sections 8. A plurality of front air paths 10 communicating with the suction port 3 are provided between the provided guide walls 11.
[0009]
A semicircular arc 13 protrudes upward from the bumper 7 on both side walls 12a and 12b of the lower case 2, and the arc 13 has a plurality of outside air intakes 14. . A vertical wall 15 is provided on the inner surface side of both side walls 12a and 12b via a rib. The vertical wall 15 is provided with a notch 16 having a substantially square shape with an open upper portion. Between the notch 16 and the side walls 12a, 12b, there is formed an accommodating portion 17 of a fitting projection provided on a bearing described later. Further, a semicircular lower support flange 18 whose lower part is continuous with the vertical wall 15 with a predetermined gap therebetween is provided inside the vertical wall 15 so as to face the suction port 3. Reference numeral 19 denotes a mounting groove provided in the longitudinal direction on the rear side of the bottom of the lower case 2 and to which a fixed cleaning body 20 made of a soft material is mounted.
[0010]
The upper portions of the side walls 21a and 21b of the rear lower case 5 are formed in a substantially semicircular shape, and the locking portion 22 of the arc portion 13 of the lower case 2 is provided on the outer rear side thereof. A cutout portion 23 is provided at a lower portion of the lower portion 21b in correspondence with the cutout portion 16 of the lower case 2. Further, a semicircular upper support flange 24 facing the lower support flange 18 of the lower case 2 is provided inside the side walls 12a and 12b with a predetermined gap therebetween.
[0011]
4 is an exploded perspective view of the rotating brush, and FIG. 5 is an enlarged view of a main part of FIG.
The rotating brush 30 according to the present embodiment connects a first rotating body 32a and a second rotating body 32b (hereinafter, sometimes simply referred to as a rotating body 32) in a hollow cylindrical shape whose entire length is divided into two. The main body 31 includes a support shaft 45 that penetrates the main body 31 to support the main body 31, and support rings 50a and 50b that are connected to both ends of the main body 31.
[0012]
The first and second rotating bodies 32a and 32b have a convex groove on the outer periphery thereof, and a rotating cleaning body (not shown) such as a brush or a blade made of soft flocking or hard flocking is mounted. A plurality of spiral-shaped cleaning body mounting portions 33 are protruded. In addition, both ends of the cleaning body mounting portion 33 are cut inward from ends of the first and second rotating bodies 32a and 32b, respectively, to form a fitting portion 34.
[0013]
The coupling portion side of the first rotating body 32a is provided with a fitting projection 35 having an outer diameter substantially equal to the inner diameter of the rotating body 32a and protruding from the end face, and has a through hole 37 at the center at the center. Further, a cylindrical fitting portion 36 provided with a plurality of slits 38 in the axial direction protrudes. Reference numeral 39 denotes a positioning locking portion projecting from the outer periphery of the fitting convex portion 35.
[0014]
On the coupling portion side of the second rotating body 32b, a fitting concave portion 40 is provided inside the end corresponding to the protruding length of the fitting convex portion 35 of the rotating body 32a, and a rotating portion is provided at the center thereof. A fitting hole 41 into which the fitting portion 36 of the body 32a fits is provided. The inside diameter of the fitting hole 41 on the entry side (end portion side) is substantially equal to the outside diameter of the fitting portion 36, and is gradually reduced toward the back, and the inside diameter on the exit side is the outside diameter of the fitting portion 36. It is slightly smaller. Reference numeral 43 denotes a positioning engaging portion that is locked by the positioning locking portion 39 of the rotating body 32a.
Reference numeral 43 denotes an air flow outlet provided between the cleaning body mounting portion 33 in the vicinity of the joint between the first and second rotating bodies 32a and 32b. .
[0015]
The support shaft 45 inserted through the first and second rotating bodies 32a and 32b is made of a metal rod, and its outer diameter is substantially equal to the inner diameter of the through hole 37 of the fitting portion 36 of the first rotating body 32a. The length is formed slightly longer than the length when the two rotating bodies 32a and 32b are combined. In addition, irregularities 31 (hereinafter, referred to as splines 31) such as spline processing and knurl processing are provided near both ends.
[0016]
Since the support rings 50a and 50b (hereinafter may be simply referred to as 50) mounted on the end openings of the first and second rotating bodies 32a and 32b have the same structure, one of the support rings will be described with reference to FIG. 50 will be described. 5, (a) is a front view, (b) is a right side view, (c) is a left side view, and (d) is a cross-sectional view.
[0017]
The support ring 50 has a circular flange portion 51 having a radius substantially equal to or slightly smaller than the radius of the lower support flange 18 of the lower case 2, and is provided at the center of one surface of a partition wall 51 a provided on the flange portion 51. A cylindrical fixing portion 52 having a through hole 53 whose inner diameter is slightly smaller than the outer diameter of the support shaft 45 is protrudingly provided, and the outer periphery of the fixing portion 52 is substantially concentric with the inner diameter of the rotating body 31. A first fitting portion 54 having a cylindrical shape and having a diameter is protruded, and the outer periphery of the first fitting portion 54 is concentric with the outer diameter of the fitting portion 34 of the rotating body 31. A second fitting portion 55 having a cylindrical shape (having a shorter protruding length) lower than the first fitting portion 54 is provided so as to project between the first and second fitting portions 54, 55. An insertion portion 56 into which the fitting portion 34 is inserted is formed. Reference numeral 57 denotes a positioning piece projecting from the second fitting portion 55 and inserted between the cleaning body mounting portion 33 of the rotating body 31 and having a height substantially equal to the height of the first fitting portion 54. Have been.
[0018]
Further, on the other surface of the partition wall 51a of the support ring 50, a cylindrical third fitting portion 58 is provided protrudingly and concentrically around the outer periphery of the fixed portion 52 slightly protruding from the partition wall 51a. A cylindrical fourth fitting portion 59 is protrudingly provided on the outer periphery substantially concentrically with the first and second fitting portions 54 and 55. Reference numeral 60 denotes an outside air inflow hole provided in the partition wall 51a between the third fitting portion 58 and the fourth fitting portion 59.
[0019]
Next, an example of a procedure for assembling the rotating brush will be described.
First, one end of the support shaft 45 is inserted into the through hole 53 of the fixing portion 52 of one of the support rings 50a, and the support shaft 45 (or the support ring 50a) is pressed to apply pressure until the end protrudes from the support ring 50a. Press. As a result, the spline 46 of the support shaft 45 bites into the through hole 53 of the fixing portion 52 and is fixed firmly and non-rotatably.
[0020]
Next, the first rotating body 32a is inserted into the support shaft 45 from the opening, and the through hole 37 of the fitting portion 36 is inserted into the support shaft 45. Then, the fitting portion 34 from which the cleaning body attachment portion 33 on the periphery of the opening has been removed is inserted into the insertion portion 56 formed between the first and second fitting portions 54 and 55 of the support ring 50a. At this time, if a projection is provided on the outer peripheral surface of the first fitting portion 54 or the inner peripheral surface of the second fitting portion 55, the projection will bite into the fitting portion 34 and be more strongly fixed. Note that the positioning piece 57 of the support ring 50a is located between the cleaning body mounting portions 33 of the first rotating body 32a.
[0021]
Next, the fitting hole 41 of the second rotating body 32b is inserted into the support shaft 45, the fitting hole 41 is fitted to the fitting portion 36 of the first rotating body 32a, and the fitting recess 40 is fitted. The engaging portion 35 is fitted, and the positioning engaging portion 42 is aligned with the positioning locking portion 39. Then, when the second rotating body 32a is pressed, the two are integrally joined. At this time, since the diameter of the fitting hole 41 is reduced toward the inner side and is smaller than the outer diameter of the fitting portion 36, the fitting portion 36 is elastically deformed by the slit 38 provided therein, and the fitting hole 41 is deformed. The second rotating body 32b does not come off from the second rotating body 32a because the second rotating body 32b is in close contact with the inner wall of the second rotating body 32a.
[0022]
Further, since the first and second rotating bodies 32a and 32b are positioned by the positioning locking part 39 and the positioning engaging part 42, the cleaning body mounting parts provided on both the rotating bodies 32a and 32b respectively. 33 is also connected continuously at the joint. At this time, the other end of the support shaft 45 including the spline 46 protrudes from the opening of the second rotating body 32b.
[0023]
In this state, both ends of the second rotating body 32b (opening side) are inserted into the convex grooves of the continuous cleaning body attaching portion 33 of the first and second rotating bodies 32a and 32b. A rotary cleaning body having a length corresponding to the length of the part 33 is inserted and attached.
Then, the through hole 53 of the fixing portion 52 of the other support ring 50b is fitted to the support shaft 45 protruding from the opening of the second rotating body 32b, and pressurized. As a result, the support ring 50b is pressed into the rotating shaft 45, and the spline 46 bites into the inner wall of the through hole 53 of the fixing portion 52, so that the supporting ring 50b is firmly fixed so as not to rotate. At this time, the fitting portion 34 of the second rotating body 32b is inserted into the insertion portion 56 formed between the first and second fitting portions 54 and 55 of the support ring 50b, and the positioning of the support ring 50b is performed. The piece 57 is located between the cleaning body attachment portions 33.
As a result, the first and second rotating bodies 32a and 32b are integrally connected at the connecting portion, are firmly fixed by the support shaft 45 and the support rings 50a and 50b, and rotate with the cleaning body attached to the outer periphery. The brush 30 is configured.
[0024]
Next, an example of a procedure for attaching the rotating brush 30 configured as described above to the suction tool 1 will be described.
First, before that, a bearing for rotatably supporting the rotating brush 30 on the suction tool 1 will be described with reference to FIG. 7A is a front view of the bearing, FIG. 7B is a right side view, FIG. 7C is a left side view, and FIG. 7D is a sectional view.
[0025]
The bearing 61 has a substantially dish-shaped main body 62 provided with a flange 61, and an end of a support shaft 45 is rotatably supported at the center of one side (right side in the figure) of the main body 62. A cylindrical support portion 64 having a support hole 65 to be formed is protruded, and a cylindrical shape having a diameter slightly smaller than the inner diameter of the fourth fitting portion 59 of the support ring 50 is provided concentrically on the outer periphery thereof. The support fitting portion 66 is provided, and a fitting portion 67 into which the fourth fitting portion 59 of the support ring 50 is loosely fitted is provided between the support fitting portion 66 and the inner wall of the main body 62. The outer diameter of the flange 63 is slightly smaller than the inner diameter of the flange 51 of the support ring 50.
[0026]
On the other side (left side in the figure) of the bottom of the main body 62, a square-shaped fixed projection 68 that is housed in the housing 17 provided on the side wall of the lower case 2 is provided in a protruding manner. Reference numeral 69 denotes an outside air flow hole provided at the bottom of the main body 62 between the support portion 64 and the support fitting portion 66.
[0027]
As shown in FIG. 8, the bearing 61 as described above loosely fits the support hole 65 of the support portion 64 to the support shaft 45 protruding from the support ring 50, and also fits the support fitting portion 66 into the first and second portions of the support ring 50. The flange 63 is fitted between the second fitting portions 58 and 59 and the flange 63 between the second fitting portion 59 and the flange 51, and the outer periphery of the bearing 61 is fitted by the flange 51 of the support ring 50. Cover. Thus, the rotating brush 30 is rotatably supported by the dual bearing 61. The connecting portion between the support ring 50 and the bearing 61 includes the third and fourth fitting portions 58, 59 and the flange portion 51 of the support ring 50, the support portion 64 of the bearing 61, the support fitting portion 66, and the flange portion. 63 are loosely fitted to each other to form a labyrinth structure L (hereinafter, also referred to as a labyrinth portion).
[0028]
As described above, the rotating brush 30 in which the cleaning body is mounted on the cleaning body mounting portion 33, the support rings 50a and 50b are coupled to both ends, and the bearings 61a and 61b are connected to the support rings 50a and 50b is shown in FIG. As shown in FIG. 9, the flanges 51 of the support rings 50a and 50b are placed on the lower support flange 18 of the lower case 2, and the fixed projection 68 of the bearing 61 is inserted into the housing 17 of the lower case 2. I do. Then, from above, the upper support flange 24 of the rear upper case 5 abuts against the flange 51 of the support rings 50a and 50b, and the cutout 23 abuts on the upper part of the fixed protrusion 68, so that the lower case 2 and the rear upper case 5 And the connecting pipe 6 is clamped between them.
[0029]
Then, the locking pieces (not shown) of the front upper case 4 are locked in the locking holes 5a of the rear upper case 5, and the front upper surface of the lower case 2 is covered and fixed to the lower case 2 with screws. The assembly of the suction tool 1 is completed. In this case, a raised cloth member 70 such as urethane or felt may be provided between the flanges 51 of the support rings 50a and 50b and the upper and lower support flanges 18 and 24. A filter may be interposed between the outside air intake port 14 provided on the second side walls 12a and 12b and the side walls 21a and 21b of the rear upper case 5.
[0030]
In the suction device 1 configured as described above, the connection pipe 6 is connected to a grip portion of a hose connected to a vacuum cleaner body (not shown) or an extension pipe connected to the grip portion, and the suction device 1 is held by the grip portion. The cleaning work is performed by moving it back, forth, left and right. At this time, a suction force is applied to the suction tool 1 by the operation of the vacuum cleaner main body, and the dust on the cleaning surface is sucked from the suction port 3 and the front air passage 10 and collected in the dust collection chamber of the vacuum cleaner main body. . The outside air sucked from the outside air inlet 14 provided in the side walls 12a and 12b of the lower case 2 by the above-mentioned suction force causes a labyrinth portion formed at a connecting portion between the bearings 61a and 61b and the support rings 50a and 50b. L is introduced into the rotating brush 30 through the outside air inlets 69 and 60, and this air flow acts on the rotating blades 44 to rotate the rotating brush 30, and the rotating cleaning body and the fixed cleaning body 20 provided on the outer periphery cause Clean the cleaning surface. The air flow introduced into the rotary brush 30 acts on the rotary wings 44, and is then discharged from the blowing port 43.
[0031]
According to the present invention configured as described above, since the connecting portion between the support ring 50 and the bearing 61 has the labyrinth structure L, the hair is not entangled with the support shaft 45 even if the hair is wound around the end of the rotary cleaning body. There is no influence on the rotation of the rotating brush 30 because there is no rotation.
Further, since the outer diameter of the support ring 50 is formed to be larger than the outer diameter of the bearing 61 and the outer circumference of the bearing 61 is covered by the support ring 50, the hair directly penetrates between the support ring 50 and the bearing 61. There is no.
[0032]
Further, since the upper and lower support flanges 18 and 24 are provided on the lower case 2 and the rear upper case 5 so as to be close to the flange 51 of the support ring 50, even if the hair is wound around the rotary cleaning body, the flange is formed. It is difficult for hair to enter the sliding surface between the upper and lower support flanges 18 and 24. Further, since the outside air inlet 14 is provided on the side walls 12a and 12b of the lower case 2, hair enters the sliding surface. Hateful.
Further, if a raised cloth member 70 such as urethane or felt is disposed between the upper and lower support flanges 18 and 24 and the flange portion 51 of the support ring 50, there is no gap between the sliding surfaces of both members, so that the hair is supported. There is no entanglement with the shaft 30, and the rotation of the rotating brush 30 is not impaired.
[0033]
In the above description, the case where the present invention is applied to the illustrated suction tool is shown. However, the present invention is not limited to this, and the present invention can be applied to a suction tool having another structure.
Further, in the above description, the case where the present invention is applied to the rotating brush in which the rotating body divided into two is combined and the supporting shaft is penetrated at the center is shown, for example, the supporting shaft is attached to both ends of one rotating body. The present invention can also be applied to a rotating brush having another structure, such as a rotating brush provided with.
[0034]
【The invention's effect】
A suction device for a vacuum cleaner according to the present invention is characterized in that a support ring is fixed to both ends of a rotating brush provided on the suction device, and a bearing for supporting the support ring is sandwiched between a lower case and an upper case. The connecting portion with the labyrinth structure does not cause hair or the like wound around the rotating brush to enter the bearing and become entangled with the support shaft, and therefore does not affect the rotation of the support shaft.
[Brief description of the drawings]
FIG. 1 is a bottom view of a suction tool of a vacuum cleaner according to one embodiment of the present invention.
FIG. 2 is a top view of FIG.
FIG. 3 is an exploded perspective view of the rotating brush of FIG. 1;
FIG. 4 is an exploded perspective view of the rotating brush.
FIG. 5 is an enlarged view of a main part of FIG. 4;
FIG. 6 is a front view, a right side view, a left side view, and a cross-sectional view of the support ring of FIG. 3;
FIG. 7 is a front view, a right side view, a left side view, and a sectional view of the bearing of FIG. 3;
FIG. 8 is a cross-sectional view showing a state where a bearing is connected to a support ring fixed to the rotating brush.
FIG. 9 is a cross-sectional view showing a state in which the rotary brush is supported by the suction tool.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Suction implement, 2 lower case, 3 suction ports, 4, 5 upper case, 12a, 12b Lower case side wall, 17 accommodating part, 18 Lower support flange, 21a, 21b Upper case side wall, 24 Upper support flange, 30 rotation Brush, 33 cleaning body mounting part, 45 support shaft, 46 spline, 50a, 50b support ring, 61 bearing, 70 brushed cloth member, L labyrinth structure.

Claims (4)

A lower case having an inlet, a plurality of rotary cleaning members mounted in a longitudinal direction of an outer peripheral surface, a rotary brush rotatably supported in the lower case and rotated by an introduced airflow, and an upper portion of the lower case An upper case, and a suction tool having a connection pipe sandwiched between the lower case and the upper case,
A supporting ring is fixed to both ends of the rotating brush, a bearing for supporting the supporting ring is sandwiched by the lower case and the upper case, and a connecting portion between the bearing and the supporting ring has a labyrinth structure. Characteristic vacuum cleaner suction tool. The suction tool of a vacuum cleaner according to claim 1, wherein an outer diameter of the support ring is larger than an outer diameter of the bearing, and the outer circumference of the bearing is covered by the support ring. The lower case and the upper case are provided with an arc-shaped support flange that abuts or is close to and opposes the outer peripheral surface of the support ring provided on the rotating brush when the bearing is sandwiched. 3. The suction device for a vacuum cleaner according to 1 or 2. The suction tool for a vacuum cleaner according to claim 3, wherein a raised fabric member is disposed between the opposed support flange and an outer peripheral surface of the support ring.

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