JPH01164343A - Suction port for electric cleaner - Google Patents

Abstract

PURPOSE: To prevent a belt from falling, by setting the angle made by the rotation center axis of a rotary brush and the rotary shaft of a motor to be an angle equal to or larger than the angle of draft of a pulley of the rotary brush. CONSTITUTION: The rotation force of a motor 51 is transmitted to a rotary brush 61 through a belt 71 stretched between a pulley 57 fixed on the rotation shaft 54 of the motor 51 and a pulley 68 fixed on the rotation brush 61. Since the mother line positioned in the opposite side of the motor 51, across from the rotation center axis of the rotary brush, and the center axis of the rotary shaft 54 of the motor 51 have the direction character to mutually approach toward a stopper part 69 of the pulley 68 of the rotary brush 61, a belt 71 is always energized toward the stopper part 69 for falling-off prevention of the belt 71. Consequently, falling-off of the belt 71 from pulleys 57 and 68 is securely prevented, including in running of a suction port main body 11 in cleaning work to which strong shock is frequently applied. Since the stopper part 69 of the pulley 68 of the rotary brush 61 is positioned to a brush bed 62 side, no useless space is created.

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention relates to a suction port body for a vacuum cleaner that transmits the power of an electric motor to a rotating brush via a belt, and This invention relates to a mounting structure of a rotating brush to which a resin pulley is fixed and an electric motor.

(Prior art) Conventionally, for example, as shown in FIG. A suction port body for a vacuum cleaner is known in which a power transmission belt 7 is stretched around a gear-shaped pulley 5 and a large-diameter gear-shaped pulley 6 coaxially fixed to the end of the rotating brush 2. However, in the suction port body of this type of conventional vacuum cleaner,
The rotating center axis of the rotating brush 2 and the center axis of the rotating shaft 4 of the electric motor 13 are made almost parallel, and the rotating brush 2 and the electric motor 8
A structure was adopted in which 13 were arranged.

A seven-lunge-shaped stopper portion 8 is formed at one end of the pulley 6 of the rotating brush 2.

(Problems to be Solved by the Invention) By the way, the pulley 6 of the rotating brush 2 is often molded from synthetic resin. Naturally, the synthetic resin pulley 6 has a tapered shape with a handling slope, and the stopper portion 8 is also located on the larger diameter side. However, in the above-mentioned conventional structure, since the rotation center axis of the rotating brush 2 and the center axis of the rotation shaft 4 of the electric motor 3 are parallel to each other, a force is applied to the belt 7 in the direction toward the smaller diameter side of the pulley 6. In addition, there was a problem that the belt 7 easily came off.

The present invention aims to solve these problems, and aims to prevent the belt from falling off in a vacuum cleaner suction mouth body in which the rotating brush pulley is made of resin with a draft angle. It is something.

[Structure of the invention]

(Means for Solving the Problems) A suction port body for electric cleaning according to the present invention includes a suction port body having a suction port on a bottom surface, and a suction port body rotatably provided in the suction port body facing the suction port. a rotating brush, an electric motor provided in the suction port body for driving the rotating brush, and a resin having a stopper portion fixed to an end of the rotating brush and having a larger diameter on the larger diameter side in the draft direction. and a belt for power transmission that is stretched around the rotating shaft of the electric motor and the pulley of the rotating brush, and the rotating shaft is formed between the central axis of rotation of the rotating brush and the rotating shaft of the electric motor. The brush has a direction in which the pulley approaches the larger diameter side, and the angle between the rotation center axis of the rotating brush and the rotation axis of the electric motor is the angle of the draft of the pulley of the rotating brush. It is the same or larger than this angle.

(Function) In the suction port body of the vacuum cleaner of the present invention, the central axis of rotation of the rotary smoke brush and the rotation axis of the electric motor are given a directionality in which they approach toward the side where the diameter of the pulley of the rotary brush increases, By making the angle between the rotating center axis of the rotating brush and the rotating shaft of the electric motor greater than or equal to the handling slope of the resin pulley fixed to the rotating brush, the belt can be stretched around this pulley and the rotating shaft of the electric motor. The belt is constantly urged toward a larger diameter stopper formed on the larger diameter side of the rotating brush pulley to prevent the belt from falling off.

(Example) Hereinafter, the structure of an example of the suction port body of a vacuum cleaner of the present invention will be described with reference to FIGS. 1 and 2.

Reference numeral 11 denotes a suction port body, which includes a main body case 13 with an opening 12 formed on the front side of the upper part, and a case-shaped lid with an open bottom surface that is detachably attached to the main body case 13 and allows the opening 12 to be freely opened. It consists of a body 14. Also,
The main body case 13 includes a lower case member 15 having an open upper surface, and an upper case member 16 connected to the rear portion of the upper surface of the lower case member 15 and having an open lower surface.

Further, a bumper 11 is provided on the outer peripheral surface of the suction port body 11 to protrude outward. The bumper 17 is held between the lower case member 15, the upper case member 16, and the lid 14.

Furthermore, inside the suction port main body 11, a rotating brush chamber 25 and a substrate storage chamber 26 are separated by partition walls 21.22.23.24, which are integrally formed with both case members 15.16 and joined to each other. Ventilation room 27 and motor storage room 2
8 and a belt chamber 29 are partitioned.

That is, the rotating brush chamber 25 is provided on the front side by the front and rear partition W121 extending in the left-right direction and having the communication port 30 formed in the center.
A pair of left and right partition walls 22 extending rearward from both side edges of the communication port 30 form a board storage chamber 26, a ventilation chamber 27 and a motor storage chamber 28 that are lined up laterally on the rear side and face the communication port 30. In addition, partition walls 23 formed on both sides of the rotating brush chamber 25 and a partition wall 24 formed on one side of the motor storage chamber 28 separate the rotating brush chamber 25 and the motor storage. A belt chamber 29 is formed on the side of the chamber 2B.

Then, facing the rotating brush chamber 25, the suction port main body 1
A suction port 31 is formed on the lower surface of the 1, and
The opening 12 extending over the entire upper surface on the front side of the front and rear partition wall 21 also faces the rotating brush chamber 25. Furthermore, an insertion hole 32 is formed in the rear surface of the suction port body 11 facing the ventilation chamber 27 .

Reference numeral 36 denotes a connecting pipe provided at the rear of the suction port main body 11 so as to be rotatable to a predetermined degree. It consists of a bent cylindrical connecting pipe 38 which is movably fitted and connected. The front part of the rotation tube 37 is formed into three semi-cylindrical parts with the front faces open.
! ! Support shaft portions 40 are formed on both side surfaces of 139 to protrude outward in the left-right direction. The semi-cylindrical portion 39 has its supporting shaft portions 40 on both sides rotated into bearing holes 41 formed at the joints of the partition walls 21 on both sides of the ventilation chamber 21.
By being fitted freely, the connecting pipe 38 is supported in the ventilation chamber 27 so as to be rotatable in the front and rear directions, and the connecting pipe 38 is projected rearward through the insertion hole 32 of the ventilation chamber 27. ing.

Further, a connector 42 is fixed to the outer peripheral surface of the connecting tube 38, and one end of a cord 43 is connected to the connector 42. This cord 43 is guided into the board storage chamber 26 from the rear surface of the suction port main body 11, and the circuit board 4 supported and fixed within this board storage chamber 26.
The other end of the cord 43 is connected to 4.

Moreover, in the electric motor storage v28 of the suction port main body 11,
The electric motor 51 is elastically supported by a pair of rubber supports 52 and 53, and the rotating shaft 54 of the electric motor Ia 51 projects into the belt chamber 29 and is rotated at the tip by a bearing 56 held by the elastic support 55. The parts are rotatably supported. A cylindrical gear-shaped pulley 57 is fixed to this rotating shaft 54.

In addition, the above-mentioned Den! ! 38151 is arranged to be slightly inclined with respect to the longitudinal direction of the suction port main body 11. Then, the circuit board 39 and the electric motor 1 are connected to each other via lead wires (not shown).
J141 is electrically connected.

Reference numeral 61 denotes a rotating brush, and a plurality of bristles 63 are planted on the outer peripheral surface of a brush stand 62 formed in a substantially cylindrical shape. Furthermore, rotating shafts 64 are fixed to both end faces of the rotating brush 61, and bearings 65 are rotatably fitted to both rotating shafts 64, respectively. Further, the rotating brush chamber 25 is provided at both ends of the suction port main body 11.
Groove-shaped bearing portions 66 having opposing surfaces and an open top surface are formed on the sides of the grooves. and,
Both bearings 65 of the rotating brush 61 are attached to these two wheel bearings 66.
is supported so as to be detachable and movable up and down in a non-rotating state. In this way, the rotating brush 61
is rotatably supported within the rotating brush chamber 25.

Note that both ends of the rotating brush 61 are inserted into oblong holding holes 61 formed in the partition walls 23 on both sides of the rotating brush chamber 25 so as to be freely rotatable and vertically movable.

Further, at the end of the rotating brush 61 located in the belt chamber 29, a gear-shaped pulley 68 is connected to the rotating shaft 64.
are fixed coaxially. This pulley 68 is molded from synthetic resin and has a truncated conical shape with a draft angle θ1. Further, a stopper portion 69 having a larger diameter and a seven-flange shape is integrally formed at the end of the pulley 68 with a larger diameter. 68 is fixed.

An endless timing belt 71 for power transmission made of glass fiber reinforced rubber or the like is stretched between the pulley 68 of the rotating brush 61 and the pulley 57 of the electric wjer 51.

And said Den! 21ta 51 is arranged such that its rotating shaft 64 is directed away from the rotation center axis of the rotating brush 61 toward the side where the diameter of the pulley 57 of the rotating brush 61 becomes smaller, and the rotating shaft 5 of the electric motor 51
The angle θ2 between the center axis of the rotary brush 61 and the rotation center axis of the rotary brush 61 is the same as or larger than the draft angle θ1 of the pulley 68 of the rotary brush 61 (θ2≧01).

Next, the operation of this embodiment will be explained.

During cleaning, the suction port is connected to the main body of the vacuum cleaner via a hose, an extension pipe, or the like.

At this time, the connection pipe 38 of the suction port body is fitted to the extension pipe, and in conjunction with this, the connector 42 provided on the connection pipe 38 is connected to the connector provided on the extension pipe,
A power supply circuit within the vacuum cleaner body and a circuit within the suction port are electrically connected via a power supply line provided along the extension pipe and the hose.

The rotational force of the electric motor 51 is transmitted to the rotating brush 61 via a belt 71 stretched between a pulley 57 fixed to the rotating shaft 54 and a pulley 68 fixed to the rotating brush 61.
This rotating brush 61 sweeps up dust from carpets and the like. The scraped up dust is sucked from the suction port 31 of the suction port main body 11 by driving the electric method Jim in the vacuum cleaner main body, and is sucked into the rotating brush chamber 25, the communication port 30, the ventilation chamber 27, the connecting pipe 36, It is led to the dust collection chamber inside the vacuum cleaner body via an extension pipe and hose.

By the way, the generatrix of the pulley 68 of the rotating brush 61 located on the opposite side of the electric motor Ia 51 with respect to the central axis of rotation of the rotating brush 61 and the central axis of the rotating shaft 54 of the electric motor 51 are 1. Since the pulleys 68 of the rotating brush 61 have a directionality in which they approach each other toward the stopper portion 69, the belt 71 is constantly urged toward the stopper portion 69 for preventing the belt 71 from being pulled out. Therefore, the belt 71 is prevented from falling off the pulleys 57 and 68, including while the suction port body 11 is running when returning and returning, which is often subject to strong impacts.

Also, the stopper portion 69 of the pulley 68 of the rotating brush 61
Since it is located on the side of the brush stand 62, no wasted space is created between the rotating brush 61 and the electric motor 51.

〔Effect of the invention〕

According to the present invention, the rotation center axis of the rotating brush and the rotating shaft of the electric motor are given a directionality in which they approach toward the larger diameter side of the resin pulley having a draft angle of the rotating brush, and Since the angle between the rotation center axis of the brush and the rotation shaft of the electric motor is set to be equal to or greater than the angle of the handling slope of the pulley having the stopper portion on the larger diameter side, By constantly urging the belt toward the stopper portion, the belt can be reliably prevented from falling off.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the suction port body of a vacuum cleaner according to the present invention with the upper case member and lid removed, Fig. 2 is a perspective view of the entire same, and Fig. 3 is a conventional FIG. 2 is a plan view showing an example of a suction port body of a vacuum cleaner with an upper case member and a lid removed. 11... Suction port body, 31... Suction port, 51... Electric motor, 54... Rotating shaft of this motor, 61... Rotating brush,
68--Pulley of this rotating brush, 69--Stopper part.

Claims (2)

[Claims] (1) A suction port body having a suction port on the bottom surface, a rotating brush rotatably provided inside the suction port body facing the suction port, and a rotating brush provided inside the suction port body driving the rotating brush. a resin pulley fixed to the end of the rotating brush and having a stopper portion with a larger diameter on the larger diameter side in the draft direction; a belt for power transmission, which has a directionality in which the central axis of rotation of the rotating brush and the rotating shaft of the electric motor approach toward the side where the diameter of the pulley of the rotating brush becomes larger; A suction mouth body for a vacuum cleaner, characterized in that the angle between the rotational center axis of the rotating brush and the rotational axis of the electric motor is greater than or equal to the draft angle of the pulley of the rotating brush. (2) The suction port body for a vacuum cleaner according to claim 1, wherein the pulley of the rotating brush is fixed to the rotating brush with the stopper portion facing toward the center of the rotating brush.