JP5846021B2 - Vacuum cleaner suction tool and vacuum cleaner provided with the same - Google Patents

Description

  The present invention relates to a suction tool having a rotary brush of a vacuum cleaner, and more particularly to a suction tool of a vacuum cleaner that improves the life and reliability of the rotary brush.

Conventionally, the rotary brush of the suction tool of a vacuum cleaner has a structure as shown in FIG. 17A (conventional example 1).
The rotating brush 200 is rotated by a rotational force of a brush motor (not shown) that is a driving source via a belt 190. At the center of the rotating brush 200 is a shaft portion 220 made of metal, resin, or the like, and bearing portions are provided at both ends thereof. One end of the shaft portion 220 is rotatably supported by the gear side bearing portion 270 on which the belt 190 is applied. The gear side bearing portion shaft 270 is fixed to a bearing holding portion 625 formed on the suction tool. Further, the other end of the shaft portion 220 is rotatably supported by a fixed-side bearing portion (not shown) opposite to the gear-side bearing portion 270, and the fixed-side bearing portion is also held by the bearing holding portion of the suction tool. . A rotary cleaning body support 230 that holds a rotary cleaning body 240 that is a dust removing body such as a brush or a blade is fixed to the shaft portion 220. Further, the rotational force is transmitted to the holding member 250 via the rotation driving unit 251 by the belt 190, and the shaft unit 220 is rotated.

  The gear-side bearing portion shaft 270 includes a bearing portion 273 and a bearing holding portion 271 that holds the bearing portion 273. The shaft portion 220 is slidably held with the bearing portion 273 by the held portion 221 that is a portion where the shaft portion 220 faces the bearing portion 273. Further, the bearing holding portion 271 is formed with an engaging portion 272 that protrudes toward the shaft portion 220, and engages with a reduced diameter portion 224 near the tip of the shaft portion 220. Further, a retaining portion 222 that protrudes in the radial direction is formed at the tip of the shaft portion 220.

FIG. 18 shows another configuration of the suction tool of the conventional vacuum cleaner (refer to Conventional Example 2, Patent Document 1).
The rotary cleaning body (rotary brush) 39 is rotated by a rotational force of a brush motor (not shown) as a drive source via a belt. The rotary cleaning body (rotating brush) 39 has a shaft portion (shaft body) 47 that rotates integrally with a holding member 45 that holds the brush base 43. The rotational force of the brush motor is transmitted to the connecting portion 59 via the belt. The held portion 87 formed integrally with the shaft portion 47 (shaft body) is rotatably supported by the rotary cleaning body holding portion (rotating brush holding portion) 40. The rotary cleaning body holding portion (rotating brush holding portion) 40 includes a fixed portion (bearing cover) 97 and a bearing 98 (corresponding to a bearing portion) provided therein.

Japanese Patent No. 2010-252980 (FIG. 1)

  In the suction tool of the vacuum cleaner described above, in Conventional Example 1 shown in FIG. 17, in order to efficiently transmit the rotational force to the rotating brush 200, tension is applied to the belt 190 toward the brush motor side, and the rotation driving unit 251 receives the rotation. A force acts upward. As a result, as shown in FIG. 17B, the gear-side bearing portion shaft 270 side of the shaft portion 220 is pulled upward, and the bearing portion 273 above the shaft portion 220 is pushed upward. An upward force F <b> 1 acts on the bearing holding portion 271 that supports the upper bearing portion 273. On the other hand, the downward force F2 acts on the upper bearing holding portion 271 as a reaction from the facing portion 625a side of the bearing holding portion 625. Since the points at which the force F1 and the force F2 act are different with respect to the extending direction of the shaft part 220, the torque by the force F1 and the force F2 acts on the bearing holding part 271, and as shown in FIG. The part 271 is rotated counterclockwise. Of the bearing portions of the rotating brush 200, the fixed bearing portion opposite to the gear side bearing portion 270 is held by the bearing holding portion of the suction tool, so that the rotating brush 200 moves upward on the gear side bearing portion shaft 270 side. The shaft part 220 is inclined with respect to the bearing part 273. As a result, there is a problem that the sliding between the bearing portion 273 and the shaft portion 220 cannot be smoothly performed, the life of the bearing portion 273 is shortened, and the reliability of the rotating brush may be impaired.

  Further, in the conventional example 2 shown in FIG. 18, when a tension is applied to the belt and, for example, a force pulling the connecting portion 59 is applied, the held portion 87 causes the bearing 98 (corresponding to the bearing portion) to move upward. Pushing force works. As a reaction, a pressing force acts downward from the fixed portion (bearing cover) 97. Since the point of action of both forces is at the same position with respect to the direction in which the shaft portion (shaft body) 47 extends, the torque as described above does not occur, and the life of the bearing 98 is not shortened. However, when the rotary cleaning body (rotating brush) 39 is attached to the rotary cleaning body holding portion (rotating brush holding portion) 40, the held portion 87 gets over the engaging portion 103 formed on the fixed portion (bearing cover) 97. Inserted. At this time, there is a problem that the held portion 87, which is a portion that slides with the bearing 98, may be damaged in a wide range along the direction in which the shaft portion (shaft body) 47 extends.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a vacuum cleaner suction tool and a vacuum cleaner using the same, which improve the life and reliability of the rotating brush. .

A suction tool for an electric vacuum cleaner according to the present invention includes a main body case having a suction port opened on a lower surface, and a rotary brush disposed in the main body case so as to face the suction port. The rotary brush includes a bearing portion, a shaft portion rotatably supported by the bearing portion, a rotary cleaning body holding portion fixed to the shaft portion, and a rotary cleaning body held by the rotary cleaning body holding portion. A rotation drive unit that is fixed to the shaft unit and transmits a rotational force that rotates the shaft unit to the shaft unit. The bearing unit rotatably supports the shaft unit and an outer periphery of the bearing unit. A bearing holding portion for covering, and the bearing portion is disposed on one side opposite to the rotary cleaning body with respect to the rotation driving portion so as not to overlap along a direction in which the central axis of the shaft portion extends. The bearing holding part that holds the bearing part is formed, To bearings unit bearing holding portion, is disposed so that at least a portion along the extending direction of the central axis of the shaft portion overlap, the bearing holder includes a box portion having four sides, one side of the box portion A cylindrical portion that protrudes to one side from the end surface, the box portion has four side surfaces that abut against the inner surface of the bearing holding portion, the cylindrical portion is formed on one side of the bearing portion, and the outer peripheral surface is the bearing holding portion. The one end surface is in contact with the inner surface of the bearing holding portion, and a space is formed between the outer peripheral surface of the cylindrical portion and the inner surface of the bearing holding portion. An engaging portion that protrudes toward the shaft portion side and prevents the shaft portion from coming off is formed .

  The suction tool of the vacuum cleaner according to the present invention can prevent the shaft portion from being inclined with respect to the bearing portion due to the force applied to the rotation driving portion, and can prevent the shaft portion sliding with the bearing portion from being damaged. It is possible to obtain a suction tool with improved lifetime and reliability and a vacuum cleaner using the same.

It is a perspective view of the electric vacuum cleaner in Embodiment 1 of this invention. It is a perspective view of the suction tool of the vacuum cleaner in Embodiment 1 of this invention. It is a disassembled perspective view of the suction tool of the vacuum cleaner in Embodiment 1 of this invention. It is a disassembled perspective view (state which removed the upper case and the lower case) of the suction tool of the vacuum cleaner in Embodiment 1 of this invention. It is a figure explaining the cooling air path of the suction tool of the vacuum cleaner in Embodiment 1 of this invention. It is the disassembled perspective view which looked at the suction tool of the vacuum cleaner in Embodiment 1 of this invention from the bottom. It is the perspective view which looked at the upper case of the suction tool of the vacuum cleaner in Embodiment 1 of this invention from the bottom. It is the perspective view which looked at the lower case of the suction tool of the vacuum cleaner in Embodiment 1 of this invention from the top. It is a top view of the lower case of the suction tool of the vacuum cleaner in Embodiment 1 of this invention. It is a perspective view of the rotating brush of the suction tool of the vacuum cleaner in Embodiment 1 of this invention. It is the figure which looked at the suction tool of the vacuum cleaner in Embodiment 1 of this invention from the bottom. It is sectional drawing of the suction tool of the vacuum cleaner in Embodiment 1 of this invention. It is a fragmentary top view (state which removed the upper case) explaining the structure of the rotation brush of the suction tool of the vacuum cleaner in Embodiment 1 of this invention, and the rotation drive part of a brush motor. It is sectional drawing explaining the structure of the gear side bearing part of the rotating brush of the suction tool of the vacuum cleaner in Embodiment 1 of this invention. It is sectional drawing explaining the structure of the stationary side bearing part of the rotating brush of the suction tool of the vacuum cleaner in Embodiment 1 of this invention. It is sectional drawing explaining operation | movement of the gear side bearing part of the rotary brush of the suction tool of the vacuum cleaner in Embodiment 1 of this invention. It is sectional drawing explaining the subject of the gear side bearing part of the rotary brush of the suction tool of the conventional vacuum cleaner. It is sectional drawing explaining the subject of the gear side bearing part of the rotary brush of the suction tool of the other conventional vacuum cleaner.

Embodiment 1 FIG.
FIG. 1 is a perspective view of the electric vacuum cleaner according to Embodiment 1 of the present invention. FIG. 2 is a perspective view of the suction tool of the electric vacuum cleaner according to Embodiment 1 of the present invention. FIG. 3 is an exploded perspective view of the suction tool of the electric vacuum cleaner according to Embodiment 1 of the present invention. FIG. 4 is an exploded perspective view of the vacuum cleaner suction tool according to Embodiment 1 of the present invention (with the upper case and the lower case removed). FIG. 5 is a diagram for explaining a cooling air passage of the suction tool of the electric vacuum cleaner according to Embodiment 1 of the present invention. FIG. 6 is an exploded perspective view of the suction tool of the electric vacuum cleaner according to Embodiment 1 of the present invention as seen from below. FIG. 7 is a perspective view of the upper case of the suction tool of the electric vacuum cleaner according to Embodiment 1 of the present invention as seen from below. FIG. 8 is a perspective view of the lower case of the suction tool of the electric vacuum cleaner according to Embodiment 1 of the present invention as seen from above. FIG. 9 is a plan view of the lower case of the suction tool of the electric vacuum cleaner according to Embodiment 1 of the present invention. FIG. 10 is a perspective view of the rotating brush of the suction tool of the electric vacuum cleaner according to Embodiment 1 of the present invention. FIG. 11: is the figure which looked at the suction tool of the vacuum cleaner in Embodiment 1 of this invention from the bottom. FIG. 12 is a cross-sectional view of the suction tool of the electric vacuum cleaner according to Embodiment 1 of the present invention. FIG. 13 is a partial plan view (with the upper case removed) illustrating the configuration of the rotary brush of the suction tool of the vacuum cleaner and the rotary drive unit of the brush motor in Embodiment 1 of the present invention. FIG. 14 is a cross-sectional view illustrating the configuration of the gear-side bearing portion of the rotary brush of the suction tool of the vacuum cleaner according to Embodiment 1 of the present invention. FIG. 15 is a cross-sectional view illustrating the configuration of the fixed-side bearing portion of the rotary brush of the suction tool of the vacuum cleaner according to Embodiment 1 of the present invention. FIG. 16 is a cross-sectional view for explaining the operation of the gear-side bearing portion of the rotary brush of the suction tool of the electric vacuum cleaner according to Embodiment 1 of the present invention. In the drawings, the same parts are denoted by the same reference numerals.

Hereinafter, description will be given with reference to FIGS.
The vacuum cleaner 1 is connected to a vacuum cleaner body 2, a hose 3 having one end connected to the main body 2, a pipe 4 having one end connected to the other end of the hose 3, and the other end of the pipe 4. It consists of the suction tool 5.
The electric vacuum cleaner body 2 includes an electric blower (not shown) that generates suction air by power supplied from a commercial power source by a power cord (not shown), a floor surface to be cleaned by the electric blower, and the like. A dust collecting part (not shown) for storing dust in the suction air sucked together with dust is incorporated.
On the other end side of the hose 3, a hand portion 3 a that is gripped by an operator and routed around the vacuum cleaner 1 is provided. The hand portion 3 a has an operation portion 3 b that starts and stops driving the electric blower and adjusts the output. Is provided.

  As shown in FIG. 2, the suction tool 5 includes a main body case 6 and a connection pipe 10 that is rotatably connected to the main body case 6, and the other end of the pipe 4 is connected to one end of the connection pipe 10. . As will be described later, the connecting pipe 10 includes a rotating pipe 11 and a joint pipe 120. Hereinafter, the vertical and horizontal directions are defined by arrows shown in FIG.

(Body case)
As shown in FIG. 3, the main body case 6 of the suction tool 5 includes an upper case 61 and a lower case 62. As will be described later, the substrate holder 63, the brush motor 63a, the bearing BOX 65, the rotating brush 200, and the like are mounted on the lower case 62. The main body case 6 has a suction port 62c that is open on the lower surface, and the rotary brush 200 is rotatably disposed so as to face the suction port 62c. A brush motor 63 a that rotationally drives the rotary brush 200 is also disposed in the main body case 6.

(Substrate holder, brush motor)
A control unit 63 c is fixed to the substrate holder 63.
A soft cover 63d is attached to the brush motor 63a to suppress the vibration of the brush motor 63a from being transmitted to a member that supports the brush motor 63a (see FIG. 4). The brush motor 63a and the control part 63c are separated so that a cylindrical part 11c of the rotating tube 11 described later is inserted. The brush motor 63a rotationally drives the rotating brush 200 via a belt (not shown).

  The tip of the rotating shaft 63b of the brush motor 63a is inserted into a bearing portion 65a formed on the bearing BOX 65 and is rotatably supported. A gear-side bearing portion 270 that is one bearing portion of the rotating brush 200 described later is also held by a bearing holding portion 65b formed in the bearing BOX 65. That is, the bearing 65a on the brush motor 63a side and the gear-side bearing 270 are integrally connected by the bearing BOX 65. The end of the bearing BOX 65 on the brush motor 63a side covers the outer periphery of the soft cover 63d and seals the cooling air path of the brush motor in the bearing BOX 65.

  FIG. 5A shows a partial perspective view of the upper case 61 near the upper side of the bearing BOX 65. FIG. 5B is a diagram in which a part of the upper surface of the upper case 61 in FIG. As shown in FIG. 5A, three first cooling holes 61h for cooling the brush motor 63a are formed near the upper portion of the bearing BOX 65. As shown in FIG. In addition, two second cooling holes for cooling the pinion gear fixed to the belt or the rotating shaft 63b of the brush motor 63a are formed. As shown in FIG. 5B, the cooling air A sucked from the first cooling hole 61h enters the brush motor 63a from the front of the brush motor 63a and cools the brush motor 63a. On the other hand, the cooling air B sucked into the bearing BOX 65 from above the bearing BOX 65 through the second cooling hole 61i is a space where the belt is accommodated in the pinion gear 63e and the belt chamber (bearing BOX 65). ) And cool the gear and belt.

  The bearing BOX 65 is made of a resin having high heat resistance, and for example, polybutylene terephthalate (PBT) resin is used. By configuring the bearing BOX 65 as a single box-shaped component, compared to the conventional configuration in which the brush motor bearing portion and the rotating brush bearing portion are separately fixed, the assembly variation and molding variation are suppressed, and the brush The distance between the shafts of the motor 63a and the rotating brush 200 can be maintained.

  The controller 63c is supplied with electric power from the vacuum cleaner main body 2 via the hose 3, the pipe 4, the joint pipe 120, and the rotating pipe 11, and is operated by the operation part 3b provided in the hand part 3a. A control signal based on the command is transmitted to the control unit 63c. The electric power adjusted based on the control signal is supplied from the control unit 63c to the brush motor 63a.

(Upper case)
The upper case 61 is a lid-like body having an open bottom surface, and four first ribs 61a projecting downward are formed at the front end. The first rib 61a is a plate-like body that is flat in the front-rear direction. A pair of reinforcing ribs 61a1 are formed at the roots of both end portions of the rear surface of the first rib 61a to increase the strength by suppressing the deformation of the first rib 61a in the front-rear direction. Further, three second ribs 61b provided with claw portions 61b1 (see FIG. 12) are formed between or outside the first ribs 61a. That is, the 2nd rib 61b is arrange | positioned in the position (position which does not overlap) different from the 1st rib 61a. The claw portion 61b1 is formed so as to protrude forward of the second rib 61b. In the center of the rear end, a cut portion 61c is formed so that the cylindrical portion 11c of the rotating tube 11 is inserted (see FIGS. 3 and 7). Further, bosses 61 d and 61 e each having a screw hole formed therein are formed at both ends of the rear portion of the upper case 61. Further, bosses 61f and 61g each having a screw hole formed therein are also formed at both ends of the lower end of the cut portion 61c of the upper case 61.

  The upper case 61 covers the substrate holder 63, the brush motor 63a, the bearing BOX 65, and the rotating brush 200 from above, and includes bosses 61d and 61e at both ends of the rear portion of the upper case 61 and bosses 62j and 62k at both ends of the rear portion of the lower case 62 described later. It is fixed with screws. Furthermore, bosses 61f and 61g at the lower end of the notch 61c at the rear part of the upper case 61 and bosses 62L and 62m at both ends at the rear end of a cylindrical part accommodating part 62h of the lower case 62 to be described later are fixed with screws. Moreover, the front end lower part of the upper case 61 and the front end upper part of the lower case 62 are a plurality of first ribs 61a of the upper case 61 and a plurality of first locked portions 62d of the lower case described later, and The claw portions 61b1 of the plurality of second ribs 61b of the upper case 61 and the plurality of second locked portions 62e of the lower case 62 are locked.

(Lower case)
As shown in FIG. 9, the lower case 62 is a horizontally long frame-like body, and a horizontally long suction port 62c is formed. Further, as shown in FIG. 6, the bearing portions 270 and 280 at both ends of the rotating brush 200 are detachably attached to the lower case 62 from the lower side of the lower case 62. Further, rotary brush covers 66 a and 66 b are detachably attached to both sides of the rotary brush 200 from below the rotary brush 200, thereby preventing the rotary brush 200 from falling off the lower case 62. In addition, a pair of receiving portions 62 a and 62 b that pivotally support a pair of lateral shaft portions (not shown) formed on both sides of a cylindrical portion 11 c that is a tip portion of the rotating tube 11 described later are formed in the lower case 62. Is done. Between the pair of receiving portions 62a and 62b, a cylindrical portion accommodating portion 62h in which the cylindrical portion 11c of the rotating tube 11 is accommodated is formed.

As shown in FIG. 8, a control unit accommodation portion 62f that accommodates the control portion 63c is formed on the right side of the cylindrical portion accommodation portion 62h. A brush motor housing portion 62g for housing the brush motor 63a is formed on the left side of the cylindrical portion housing portion 62h. A U-shaped lead wire passing part 62i that communicates the control part accommodating part 62f and the brush motor accommodating part 62g in front of the cylindrical part accommodating part 62h.
Is formed. The lead wire passing portion 62i is accommodated with a lead wire 130 that supplies power from the control portion 63c to the brush motor 63a. Further, bosses 62j and 62k are formed at both ends of the rear portion of the lower case 62, and screws inserted from below the bosses 62j and 62k are screwed to the bosses 61d and 61e of the upper case. Furthermore, bosses 62L and 62m are formed at both ends of the rear end of the cylindrical portion accommodating portion 62h, and screws inserted from below the bosses 62L and 62m are screwed to the bosses 61f and 61g of the upper case (FIG. 7). reference). In addition, a U-shaped bumper 621 is attached to the front portion of the lower case 62 in the longitudinal direction (see FIG. 3).

  Corresponding to the four first ribs 61a of the upper case 61, four first locked portions 62d are formed on the back surface of the front end of the lower case 62 (see FIG. 8). Each of the first locked portions 62d covers a pair of ends of the first rib 61a and at least a part of the rear surface connected to the first rib 61a in a state where the upper case 61 and the lower case 62 are locked. A side locked portion 62d1 and a bottom locked portion 62d2 that contacts and faces the lower end of the first rib 61a are formed. The bottom locked portion 62d2 may be formed so as to face the lower end of the first rib 61a in close proximity. In a state where the upper case 61 and the lower case 62 are locked, the interval between the pair of reinforcing ribs 61a1 is determined so that the pair of reinforcing ribs 61a1 enter inside the pair of side locked portions 62d1. Therefore, when the upper case 61 and the lower case 62 are locked, even if the reinforcing rib 61a1 is pressed into the side locked portion 62d1, it can be mounted.

  Further, three second locked portions 62e are formed on the back surface of the front end of the lower case 62 corresponding to the three second ribs 61b of the upper case 61 (see FIG. 8). That is, between the three second ribs 61b, the second locked portion 62e is formed with a hole 62e1 in which the claw portion 61b1 formed on the second rib 61b is locked.

  In addition, five hanging portions 622a, 622b, 622c, 622d, and 622e hanging downward are formed at the lower end of the front end of the lower case 62 (see FIG. 6). The cross-sectional shape of each hanging portion 622 is formed in a substantially L shape toward the rear. In addition, you may form in circular arc shape. The central hanging portion 622c is formed wider than the other hanging portions, and is disposed in front of a front opening of a cylindrical portion 11c of the rotating tube 11 described later (see FIG. 9).

(Connection pipe)
As shown in FIG. 2, the connecting pipe 10 includes a rotating pipe 11 and a joint pipe 120. A plurality of lead wires (not shown) are inserted into the connecting tube 10, and power is supplied from the cleaner body 2 to the brush motor via the connecting tube 10.
The rotating tube 11 includes a cylindrical portion 11c, a straight tube portion 11d, and a flange portion 11e. At both ends of the cylindrical portion 11c, shaft portions (not shown) that are laterally (longitudinal direction of the main body case 6) are formed at the end portions of the main body case 6 (one side). Receiving portions 62a and 62b that respectively support these shaft portions are formed on the main body case side (see FIG. 3). As a result, the rotating tube 11 is pivotally supported around the shaft portion so as to be rotatable in the vertical direction. The flange part 11e is a part connected to a joint pipe 120 described later.
The joint pipe 120 is connected to the other side of the rotating pipe 11 and is pivotally supported so as to be rotatable in the circumferential direction along the end surface of the flange portion 11e on the other side of the rotating pipe 11.

(Rotating brush)
As shown in FIG. 10, the rotating brush 200 is composed of a main body portion 210 and two bearing portions provided at both ends thereof, that is, a gear side bearing portion 270 and a fixed side bearing portion 280.
The main body portion 210 extends in the longitudinal direction at the center, and includes a shaft portion 220 made of metal, resin, or the like (see FIG. 14). A rotary cleaning body support portion 230 that holds the shaft, a first holding member 250 that is fixed to one end side of the shaft portion 220 and that integrally forms a rotation drive portion 251 that transmits the rotational force of the belt 190 to the shaft portion 220; And a second holding member 260 fixed to the other end side of the shaft portion 220. In addition, retaining portions 222 and 226 protruding in the radial direction are formed at the tip portions at both ends of the shaft portion 220 (see FIGS. 14 and 15).
The gear side bearing portion 270 is detachably attached to a bearing holding portion 65b formed in a bearing BOX 65 attached to the lower case 62 of the suction tool 5 (see FIG. 13). The fixed-side bearing portion 280 is detachably attached to a bearing holding portion 625 formed on the lower case 62 (see FIG. 11).

(Rotary cleaning body)
The rotary cleaning body 240 has a base (not shown) at the lower end, and a plurality of grooves are formed on the surface of the rotary cleaning body support 230 along the longitudinal direction. The rotational cleaning body 240 is held by the rotational cleaning body support 230 by inserting the base of the rotational cleaning body 240 into the groove from one end of the rotational cleaning body support 230.

(First holding member)
As shown in FIG. 14, the first holding member 250 is fixed to one end side of the shaft portion 220 and the rotary cleaning body support portion 230. The end of the first holding member 250 on the rotary cleaning body support portion 230 side prevents the rotary cleaning body 240 from falling off the rotary cleaning body support portion 230. On the gear-side bearing 270 side of the first holding member 250, a first rotation driving unit 251 is integrally formed. The first rotation drive unit 251 has a cylindrical shape, and a gear unit 252 that contacts the belt 190 is formed on the surface thereof. An inner peripheral surface 254 is formed on the opposite side of the rotation drive unit 251 from the gear unit 252 and communicates with the outside air. Further, an end surface 253 that is continuous with the inner peripheral surface 254 and orthogonal to the shaft portion 220 is formed. The end surface 253 and the end surface 276 of the gear-side bearing portion 270 described later are separated from each other, and a space portion 279 communicating with a bearing portion 273 described later communicates with the outside air.

(Gear side bearing)
As shown in FIG. 10, the gear-side bearing portion 270 is generally a box having a substantially square cross section in a direction orthogonal to the shaft portion 220, and four sides are substantially rectangular, and a cylindrical portion 274 at its end face (see FIG. 14). The bearing portion 273 that rotatably supports the shaft portion 220 and the bearing holding portion 271 that covers the outer periphery of the bearing portion 273 and holds the bearing portion 273 are provided.
The bearing part 273 rotatably supports the held part 221 of the shaft part 220.
The bearing holding portion 271 is formed with an engaging portion 272 that protrudes toward the shaft portion 220 on one side of the bearing portion 273 and prevents the shaft portion 220 of the rotating brush 200 from coming off. Engage with the reduced diameter portion 224 in the vicinity. The bearing holding portion 271 includes a cylindrical portion 274 in which a portion having the engaging portion 272 protrudes to one side. Further, a thinned portion 277 is formed in which the vicinity of the center of the four ridge lines on the cylindrical portion 274 side of the box portion of the bearing holding portion 271 is cut into a rectangular parallelepiped shape.

(Second holding member)
As shown in FIG. 15, the second holding member 280 is fixed to the other end side (fixed portion bearing portion 280 side) of the shaft portion 220 and the rotary cleaning body support portion 230. The end of the second holding member 280 on the rotary cleaning body support portion 230 side prevents the rotary cleaning body 240 from falling out of the rotary cleaning body support portion 230. Two ribs 262 and 262 are formed on the fixed-side bearing portion 280 side of the second holding member 280 in parallel with the extending direction of the shaft portion 220 and communicate with a bearing portion 283 of the fixed-side bearing portion 280 described later. A labyrinth portion 285 is formed in which the portion 289 communicates with outside air.

(Fixed side bearing)
As shown in FIG. 4, the fixed-side bearing portion 280 has a box-like shape in which the cross section in the direction orthogonal to the shaft portion 220 is substantially square and the four side surfaces are substantially rectangular. A bearing portion 283 that rotatably supports the shaft portion 220 and a bearing holding portion 281 that covers the outer periphery of the bearing portion 283 and holds the bearing portion 283 are provided (see FIG. 15).
The bearing part 283 rotatably supports the held part 223 of the shaft part 220.
The bearing holding portion 281 is formed with an engaging portion 282 that protrudes to the shaft portion 220 side on the other side of the bearing portion 283 and prevents the shaft portion 220 of the rotating brush 200 from coming off. Engages with a nearby reduced diameter portion 227. Further, a rib 286 extending in parallel with the central axis of the shaft portion 220 is formed between the ribs 261 and 262 at the end of the bearing holding portion 281 on the second holding member 260 side. The ribs 261, 262, and 286 form a labyrinth portion 285 that allows outside air to communicate with the space portion 289.

Next, the operation will be described.
By connecting the power cord built in the vacuum cleaner body 2 to an outlet and operating the operation part 3b provided on the hand part 3a, the electric blower in the vacuum cleaner body 2 is driven and suction air is generated. To do. Due to this suction air, air together with dust from the floor surface or the like to be cleaned is supplied from the suction port 62 c on the lower surface of the main body case 6 of the suction tool 5 to the connecting pipe 10 (rotating pipe 11, joint pipe 120), pipe 4. The vacuum cleaner body 2 is taken in via the hose 3. The air containing the dust taken into the vacuum cleaner body 2 is stored in the dust collection chamber, and the air from which the dust has been removed is discharged from the vacuum cleaner body.

  When an operation of driving the electric blower is performed by the operation unit 3b, the rotary brush 200 is driven to rotate the rotary brush 200 disposed in the main body case 6 of the suction tool 5 so as to scrape dust on the surface to be cleaned. Electric power is supplied to the brush motor 63a that drives the motor. This electric power is supplied from the vacuum cleaner body 2 to the hose 3, the pipe 4, the joint pipe 120, the rotating pipe 11, and the control unit 63 c that controls the brush motor 63 a that is disposed in the main body case 3 of the suction tool 5. Then, it is supplied to the brush motor 63a.

  When cleaning, the user holds the hand portion 3a and moves the suction tool 5 on the surface to be cleaned. When the suction tool 5 is moved, it may collide with a wall or furniture, and a load due to the collision is applied to the suction tool 5 from front and rear, up and down, and left and right. Moreover, if the suction tool 5 is accidentally dropped, a load due to a drop impact is applied.

  The four first ribs 61 a formed below the front end of the upper case 61 are locked to the four first locked portions 62 d formed on the upper front end of the lower case 62. Since the lower end of the first rib 61a comes into contact with the bottom locked portion 62d2 of the first locked portion 62d, the load applied to the upper case 61a from above is divided into a plurality of loads from the plurality of first ribs 61a. It is transmitted to the first locked portion 62d. In this way, the load is distributed to the upper case 61 and the lower case 62, and the deformation of the upper case 61 and the lower case 62 due to the load from above is reduced and the strength is increased in the sense that it is difficult to break. Furthermore, when the upper case 61 is fixed to the lower case 62 and the main body case 6 is assembled, the first locked portion 62d serves as a guide for positioning the first rib 61a, so that the assembling property and the assembling efficiency are improved. Is done.

  When the bottom locked portion 62d2 is formed so as to face the lower end of the first rib 61a close to the first rib 61a, when the upper case 61 is deformed downward by a load from above, the first rib Since the lower end of 61a abuts against the bottom locked portion 62d2 of the first locked portion 62d, the load applied from above to the upper case 61a is a plurality of loads from the plurality of first ribs 61a as described above. The load is distributed to the upper case 61 and the lower case 62, the deformation of the upper case 61 and the lower case 62 due to the load from above is reduced, and it is difficult to break. Thus, the required strength is ensured in the sense that the deformation of the upper case 61 and the lower case 62 is reduced.

Further, since the pair of side locked portions 62d1 of the first locked portion 62e covers both ends of the first rib 61a and at least a part of the rear surface connected to these, the front and rear direction with respect to the upper case 61 Is applied to the plurality of first locked portions 62d from the plurality of first ribs 61a. In this way, the load is distributed to the upper case 61 and the lower case 62, so that deformation of the upper case 61 and the lower case 62 due to the load from the front and rear direction is reduced, and it is difficult to break.
Even when a load is applied to the upper case 61 from the left and right directions, the load is transmitted from the plurality of first ribs 61a to the plurality of first locked portions 62d. Here, it is desirable that the gap between the both side tongues of the first rib 61a and the side locked portion 62d1 is small. In this way, the load is distributed to the upper case 61 and the lower case 62, so that deformation of the upper case 61 and the lower case 62 due to the load from the left and right direction is reduced and it is difficult to break.

  In addition, the first rib 61a is a plate-like body that is flat in the front-rear direction, and has a strength that suppresses deformation in the front-rear direction of the first rib 61a at the root portions of both ends of the rear surface of the first rib 61a. Since the pair of reinforcing ribs 61a1 are formed, the reinforcing rib 61a1 suppresses deformation of the first rib 61a even when a load is applied to the first rib 61a from the front-rear direction, and the strength is increased.

  Further, even when a load in the direction of separating the two is applied to the upper case 61 or the lower case 62, the claw portion 61b1 of the second rib 61b is formed on the back surface of the front end of the lower case 62. Since it is latched by the hole 62e1 of the stopper 62e, the upper case 61 and the lower case 62 are prevented from separating.

  Moreover, since the 2nd rib 61b was arrange | positioned in the position different from the 1st rib 61a, both do not interfere. As a result, the degree of freedom of design of both increases.

Further, since five hanging portions 622a, 622b, 622c, 622d, and 622e hanging downward are formed at the lower end of the front end of the lower case 62, the frame is a frame-like body as compared with the case where there is no hanging portion 622. The rigidity of the lower case 62 is increased.
Moreover, since the drooping portion 622 is arranged differently from the first locked portion 62d, the drooping portion 622 and the first locked portion 62d can be arranged without interference. As a result, the degree of freedom of design of both increases.
In addition, the driving sound of the electric blower built in the vacuum cleaner body 2 passes through the hose 3 and the pipe 4 and is transmitted to the suction tool 5, but the central hanging portion 622 c passes through the cylindrical portion of the rotating tube 11. Since it arrange | positions ahead of the front opening of 11c (opening to the main body case 6 side), it can suppress that a vibration sound is transmitted to the space ahead of the suction tool 5. FIG.

  In the above description, an example in which a load is applied to the upper case 61 has been described. However, even when a load is applied to the lower case 62, the load is dispersed in the upper case 61, and a suction tool that secures a required strength with a light weight. A vacuum cleaner using this can be obtained.

Also, the upper case 61 is provided with the first rib 61a and the lower case 62 is provided with the first locked portion 62d. However, the lower case 62 is provided with the first rib 61a, and the upper case 61 is provided with the first rib 61a. A locked portion 62d may be provided.
Similarly, the second rib 61 b is provided on the upper case 61 and the second locked portion 62 e is provided on the lower case 62. However, the second rib 61 b is provided on the lower case 62 and the second case 61 is provided on the upper case 61. A locked portion 62e may be provided.

Next, the operation of the bearing portions 270 and 280 that rotatably support the rotating brush 200 will be described.
First, operation | movement of the gear side bearing part 270 is demonstrated.
FIG. 16 is a cross-sectional view illustrating the operation of the gear-side bearing portion of the rotary brush of the suction tool of the electric vacuum cleaner according to Embodiment 1 of the present invention. FIG. 16A shows a state where the gear side bearing portion 270 of the rotating brush 200 is held by the bearing holding portion 65b. Here, the flat portions of the four side surfaces of the box portion of the gear-side bearing portion 270 come into contact with the inner surface of the bearing holding portion 65b facing it, so that the gear-side bearing portion 270 does not rotate with respect to the bearing holding portion 65b. Retained. Further, the end surface of the cylindrical portion 274 of the gear side bearing portion 270 comes into contact with the inner surface of the bearing holding portion 65b facing it, thereby restricting the gear side bearing portion 270 from moving toward the bearing holding portion 65b. The belt 190 is hung upward with respect to the rotation driving unit 251 of the first holding member 250.
Further, the bearing portion 273 is disposed on one side opposite to the rotary cleaning body 240 with respect to the rotation driving portion 251 so as not to overlap along the direction in which the central axis of the shaft portion 220 extends.

  In order to efficiently transmit the rotational force to the rotary brush 200, tension is applied to the belt 190 toward the brush motor side, and a force acts on the rotation drive unit 251 in the upward direction. As a result, as shown in FIG. 16, the gear side bearing portion shaft 270 side of the shaft portion 220 is pulled upward, and the bearing portion 273 above the shaft portion 220 is pushed upward. An upward force F <b> 1 acts on the bearing holding portion 271 that supports the upper bearing portion 273. The point of action of the force F is substantially the center along the direction in which the shaft part 220 of the bearing part 273 extends. On the other hand, the upper bearing holding portion 271 acts as a reaction by a downward force F2 (the same size as the force F1) from the facing portion 65b1 side of the bearing holding portion 65b. Here, the bearing portion 273 is disposed on one side opposite to the rotary cleaning body 240 with respect to the rotation driving portion 251 so as not to overlap along the direction in which the central axis of the shaft portion 220 extends. The bearing holding portion 271 of the portion to be pushed up can be disposed outside the raceway of the belt 190 (on the gear side bearing portion shaft 270 side), and the opposing portion 65b1 of the bearing holding portion 65b does not interfere with the belt 190, so that the bearing The degree of freedom in designing the holding portion 65b increases.

  Further, the bearing holding portion 271 has an engaging portion 272 that protrudes toward the shaft portion 220 on one side (the gear-side bearing portion shaft 270 side) from the bearing portion 273 and prevents the rotary brush 220 from coming off. When the shaft portion 220 is inserted into the gear-side bearing portion shaft 270, the engaging portion 272 does not damage the held portion 221 that holds the bearing portion 271, and the life and reliability of the rotary brush 200 is improved.

  Moreover, since the cylindrical part 274 which is a part which has the engaging part 272 protrudes to one side, the bearing holding | maintenance part 271 can raise the elasticity of the latching | locking part 272 easily, and the axial part 220 is made into the gear side bearing part axis | shaft. When inserted into 270, the retaining portion 222 of the shaft portion 220 can easily get over the engaging portion 272, and the assembling property is improved. Further, the shaft portion 220 can radiate heat generated by friction with the bearing portion 271 and the locking portion 272 from the surface of the cylindrical portion 274 having a large surface area, and the temperature of the shaft portion can be suppressed from rising, so that the rotating brush 200 lifetime and reliability are improved.

  Further, due to the tension of the belt 190, the facing portion 65b1 where the gear side bearing portion shaft 270 contacts the bearing holding portion 65b and the bearing portion 273 partially overlap along the direction in which the central axis of the shaft portion 220 extends. Are arranged as follows. It is desirable that they are arranged so as to overlap 50% or more. That is, as shown in FIG. 16A, the length L1 of the portion where the bearing portion 273 overlaps the facing portion 65b1 with respect to the length L of the facing portion 65b1 along the direction in which the central axis of the shaft portion 220 extends. The ratio is 50% or more. As a result, the positions of the action points of the force F1 and the force F2 coincide. As a result, no torque acts on the bearing holding portion 271 and the shaft portion 220 does not tilt with respect to the bearing portion 273, thereby improving the life and reliability of the rotating brush 200.

  Moreover, since the bearing holding part 273 has the space part 279 which the bearing part 273 communicates with external air, the bearing part 273 can be cooled efficiently and the lifetime and reliability of the rotating brush 200 improve.

  Further, since the thinned portion 277 is provided in the bearing holding portion 271 of the gear side bearing portion 270, the weight of the bearing holding portion 271 is reduced and the surface area of the bearing holding portion 271 is increased, so that heat is radiated from the cylindrical portion 274. In addition, heat can be radiated from the meat thinned portion 277, and the temperature of the shaft portion can be prevented from rising.

Next, the operation of the fixed portion side bearing portion 280 will be described.
FIG. 15A shows the configuration of the fixed portion side bearing portion 280, and FIG. 15B shows the state where the fixed portion side bearing portion 280 is held by the bearing holding portion 625. Here, the four side surfaces of the fixed-side bearing portion 280 come into contact with the inner surface of the bearing holding portion 625 that faces the fixed-side bearing portion 280, and the fixed-side bearing portion 280 is held so as not to rotate with respect to the bearing holding portion 625. Further, the end surface of the fixed-side bearing portion 280 comes into contact with the inner surface of the bearing holding portion 625 that faces the fixed-side bearing portion 280, thereby restricting the fixed-side bearing portion 280 from moving toward the bearing holding portion 625.

  The bearing holding portion 281 has an engaging portion 282 that protrudes toward the shaft portion 220 side on the other side (opposite side to the gear-side bearing portion shaft 270) than the bearing portion 283 and prevents the rotary brush 220 from coming off. When the shaft portion 220 is inserted into the fixed-side bearing portion shaft 280, the engaging portion 282 does not damage the held portion 223 that holds the bearing portion 281, and the life and reliability of the rotating brush 200 is improved.

  Since the space part 289 communicating with the bearing part 283 and the labyrinth part 285 communicating with the outside air are formed between the second holding member 260 and the fixed-side bearing part 280, the bearing part 283 can be efficiently cooled. In addition, since dust, hair, and the like can be prevented from entering the bearing portion 283, the life and reliability of the rotating brush 200 are improved.

Thus, according to the suction tool of the vacuum cleaner and the vacuum cleaner using the same according to the first embodiment, the main body case having the suction port opened on the lower surface and the main body case arranged to face the suction port. In a vacuum cleaner suction tool provided with a rotating brush, the rotating brush includes a bearing portion, a shaft portion rotatably supported by the bearing portion, and a rotary cleaning body holding portion fixed to the shaft portion. And a rotary cleaning body held by the rotary cleaning body holding section, and a rotation drive section that is fixed to the shaft section and transmits a rotational force that rotates the shaft section to the shaft section, and the bearing section rotates the shaft section. A bearing unit that is movably supported, and a bearing holding unit that covers an outer periphery of the bearing unit. The bearing unit is disposed on one side opposite to the rotary cleaning body with respect to the rotation drive unit, and the central axis of the shaft unit. It is arranged so that it does not overlap along the extending direction, the body A bearing holding portion for holding the bearing portion is formed on the sleeve, and the bearing portion is arranged so that at least a part of the bearing holding portion overlaps the bearing holding portion along the direction in which the central axis of the shaft portion extends. A box portion having four side surfaces, and a cylindrical portion projecting to one side from an end surface on one side of the box portion, the four side surfaces abut against the inner surface of the bearing holding portion, Formed on one side of the bearing portion, the outer peripheral surface does not contact the inner surface of the bearing holding portion, the end surface on one side contacts the inner surface of the bearing holding portion, and the outer peripheral surface of the cylindrical portion and the bearing holding portion A space is formed between the inner surface and the cylindrical portion is formed with an engaging portion that protrudes toward the shaft portion and prevents the shaft portion from coming off, so that the shaft portion does not tilt with respect to the bearing portion. Further, the shaft portion sliding with the bearing portion can be prevented from being damaged.

  Further, since the bearing holding portion has a portion having an engaging portion projecting to one side, the assemblability when the shaft portion is inserted into the gear-side bearing portion shaft is improved. Moreover, since heat is radiated from the outer surface of the protruding portion, it is possible to suppress the temperature of the shaft portion from rising.

  The rotation drive unit is driven to rotate by the belt, and the portion where the bearing unit abuts on the bearing holding unit due to the belt tension and the bearing unit are arranged so as to overlap 50% or more along the direction in which the central axis of the shaft unit extends. Therefore, it can prevent reliably that a shaft part inclines with respect to a bearing part.

  Moreover, since the bearing holding part has the space part which a bearing part communicates with external air, the temperature rise of a bearing part can be suppressed.

1 vacuum cleaner, 2 vacuum cleaner body, 3 hose, 3a hand part, 3b operation part,
4 pipe, 5 suction tool, 6 body case, 61 upper case, 61a first rib,
61a1 reinforcing rib, 61b second rib, 61b1 claw part, 61c notch part,
61d, 61e, 61f, 61g boss, 61h, first cooling hole,
61i 2nd cooling hole, 62 lower case, 62a, 62b receiving part,
62c suction port, 62d first locked portion, 62d1 side locked portion,
62d2 bottom locked portion, 62e second locked portion, 62e1 hole,
62f control unit accommodation unit, 62g brush motor accommodation unit, 62h cylindrical unit accommodation unit,
62i lead wire transfer section, 62j, 62k, 62L, 62m boss, 621 bumper,
622, 622a, 622b, 622c, 622d, 622e
625 bearing holder, 63 substrate holder,
63a brush motor, 63b rotating shaft, 63c control unit, 63d soft cover,
65 bearing BOX, 65a bearing part, 65b bearing holding part, 65b1 facing part,
66a, 66b rotating brush cover, 10 connecting tube, 11 rotating tube, 11c cylindrical part,
11d straight pipe part, 11e flange part, 120 joint pipe,
190 belt, 200 rotating brush, 210 main body, 220 shaft,
221 held portion, 222 retaining portion, 223 held portion, 224 reduced diameter portion,
226 retaining portion, 227 reduced diameter portion, 230 rotating cleaning body support, 240 rotating cleaning body,
250 first holding member, 251 rotation drive unit, 252 gear unit, 253 end face,
254 inner peripheral surface, 260 second holding member, 261, 262 rib,
270 gear side bearing part, 271 bearing holding part, 272 engaging part,
273 Bearing part, 274 Cylindrical part, 276 End face, 277 Thickened part,
279 Space part, 280 Fixed bearing part, 281 Bearing holding part, 282 Engagement part, 283 Bearing part, 285 Labyrinth part, 286 Rib, 289 Space part.

Claims (5)

A body case having a suction port opened on the lower surface;
In the suction tool of the vacuum cleaner provided with a rotating brush disposed in the main body case so as to face the suction port,
The rotating brush is
A bearing portion;
A shaft portion rotatably supported by the bearing portion;
A rotary cleaning body holding part fixed to the shaft part;
A rotary cleaning body held by the rotary cleaning body holding portion;
A rotation drive unit that is fixed to the shaft part and transmits a rotational force that rotates the shaft part to the shaft part;
The bearing portion includes a bearing portion supporting the shaft portion rotatably, and a bearing holding portion for covering the outer periphery of the bearing portion,
The bearing portion is arranged on one side opposite to the rotary cleaning body with respect to the rotational drive portion so as not to overlap along a direction in which a central axis of the shaft portion extends,
The main body case is formed with a bearing holding portion for holding the bearing portion,
The bearing portion is arranged so that at least a part of the bearing holding portion overlaps the bearing holding portion along the direction in which the central axis of the shaft portion extends,
The bearing holding portion includes a box portion having four side surfaces, and a cylindrical portion protruding to the one side from the end surface on the one side of the box portion,
The box part has four side surfaces abutting against the inner surface of the bearing holding part,
The cylindrical portion is formed on the one side with respect to the bearing portion, the outer peripheral surface does not contact the inner surface of the bearing holding portion, and the end surface on the one side contacts the inner surface of the bearing holding portion,
A space is formed between the outer peripheral surface of the cylindrical portion and the inner surface of the bearing holding portion,
A suction tool for a vacuum cleaner , wherein the cylindrical portion is formed with an engaging portion that protrudes toward the shaft portion and prevents the shaft portion from coming off . In the box portion, a thinned portion is formed on the ridge line of the end surface on the one side,
The suction tool for an electric vacuum cleaner according to claim 1 , wherein the meat thinning portion communicates with a space formed between an outer peripheral surface of the cylindrical portion and an inner surface of the bearing holding portion . The length along the central axis direction of the portion of the bearing portion that overlaps the bearing holding portion is along the central axis direction of the portion of the inner surface of the bearing holding portion that contacts the side surface of the box portion. The suction tool for a vacuum cleaner according to claim 1 or 2, wherein the suction tool is 50% or more of the length . 4. The vacuum cleaner suction tool according to claim 1, wherein the bearing holding portion includes a space portion in which the bearing portion communicates with outside air. 5. The suction tool of the vacuum cleaner according to any one of claims 1 to 4, an electric blower that is connected to the suction tool and generates suction air, and a dust collecting unit that stores dust sucked by the electric blower And a vacuum cleaner body with a built-in vacuum cleaner.

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