JP2589316B2 - Vacuum cleaner suction body - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a suction port of a vacuum cleaner having a rotatable brush rotatably driven by a rotary drive.

2. Description of the Related Art Conventionally, as a suction port of a vacuum cleaner that scrapes out dust from a carpet by a rotating brush driven by an electric motor or an air turbine, a structure described in, for example, Japanese Utility Model Laid-Open No. 57-8054 is disclosed. It has been known.

In the suction port body of the conventional vacuum cleaner described in Japanese Utility Model Publication No. 57-8054, the load applied to the rotating brush is adjusted to an appropriate value according to the length of the carpet hair and the like. The bearings rotatably supporting the rotating shafts provided at both ends of the rotating brush are vertically movably supported by bearings formed on the main body case and having contact surfaces with the front, rear and lower surfaces of the bearing. Structure is adopted. However, since the bearing described in Japanese Utility Model Publication No. 57-8054 can slide freely in the vertical direction, the vibration of the rotating brush caused by the rotation of the rotating brush is large due to the rattling of the bearing. At the same time, there is a problem that this vibration sound is easily transmitted to the main body case and the like.

Therefore, as a suction port body of a conventional vacuum cleaner, springs are provided at both ends of a lower surface of a lid body that opens and closes a rotating brush cleaning opening formed on an upper surface of a main body case facing a rotating brush, These springs are brought into contact with the upper surfaces of the bearings at both ends of the rotating brush, and the bearings are urged downward, so that the vibration accompanying the rotation of the rotating brush is absorbed by the spring.

However, in order to sufficiently absorb the vibration, the urging force of the spring must be increased, so that the vibration of the rotating brush is easily transmitted to the lid via the spring, and the noise increases. In addition, since the rotating brush has a large urging force for urging toward the surface to be cleaned such as the floor surface, the unpleasant sound when the bristles of the rotating brush hit the floor surface also increases.

Further, conventionally, since the lid has a structure in which the lid is directly in contact with the main body case, there is a problem that vibration is easily propagated between the rigidly connected lid and the main body case.

(Problems to be Solved by the Invention) As described above, the suction port body of the vacuum cleaner described in Japanese Utility Model Laid-Open No. 57-8054 has a problem that the vibration noise caused by the rotation of the rotating brush is large. In addition, the suction port of the vacuum cleaner in which the bearings of the rotating brush are biased downward by a spring for absorbing vibration has a structure in which the bearings at both ends of the rotating brush are both biased by springs. Vibration is likely to be transmitted to the lid provided with the rotary brush, and there is a problem that the noise of the rotating brush hitting the floor or the like becomes loud.

SUMMARY OF THE INVENTION 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 port of a vacuum cleaner in which vibration and noise accompanying rotation of a rotating brush are reliably reduced with a simple structure. Is what you do.

(Means for Solving the Problems) The suction port body of the vacuum cleaner of the present invention has a rotary brush chamber provided therein, a dust suction port provided on the lower surface facing the rotary brush chamber, and an opening provided on the upper surface. A main body case, a lid body for opening and closing the opening of the main body case, and a rotary brush disposed in a rotary brush chamber of the main body case;
A pulley provided at one end of the rotating brush and a rotating shaft provided at both ends of the rotating brush are rotatably attached to bearings provided at both ends of the rotating brush chamber. A bearing that is supported and rotatably supports the rotary brush chamber, and a rotary driver that is provided in the main body case and drives the rotary brush;
A rotation transmission belt stretched between the rotation shaft of the rotation driving body and the pulley of the rotation brush, and the rotation transmission belt provided between the lid and the bearing of the rotation brush for urging the bearing downward; And the elastic body is provided only on the bearing side at the end opposite to the pulley of the rotating brush.

(Operation) In the suction opening body of the electric vacuum cleaner of the present invention, at the time of cleaning, the rotation transmitting belt stretched between the rotating shaft of the rotary driving body and the pulley at one end of the rotating brush is provided with the rotating brush. On the pulley side of the rotary brush, the elastic body provided with a bearing at the end on the opposite side of the rotary brush faces downward on the side opposite to the pulley of the rotary brush. The vibration of the rotating brush is not transmitted to the lid on the pulley side where no elastic body is interposed between the lid and the lid, so that the vibration is reduced and the structure is simplified by reducing the number of members. Vibration and noise of the lid due to rotation of the rotating brush are reliably reduced.

(Embodiment) Hereinafter, a configuration of an embodiment of a suction port body of a vacuum cleaner according to the present invention will be described with reference to FIGS. 1 to 6.

Reference numeral 1 denotes a suction port main body. The suction port main body 1 includes a main body case 3 having an opening 2 formed in an upper front side, and a main body case 3.
And a case-like lid 4 having an open lower surface for opening and closing the opening 2 so as to be freely attached and detached.
The main body case 3 includes a lower case member 5 having an open upper surface, and an upper case member 7 which is connected to a rear portion of the upper surface of the lower case member 5 with a screw 6 or the like and has an open lower surface. Furthermore, the outer peripheral surface of the suction port main body 1, that is, the front surface,
Bumpers 8 made of an elastic member such as rubber are provided on both sides and a rear surface so as to protrude outward. The bumper 8 includes the lower case member 5, the upper case member 7, and the lid 4
Is sandwiched between.

Further, inside the suction port main body 1, the rotating brush chamber 19, the substrate storage chamber 20, and the ventilation chamber 21 are formed by partition walls 15 to 18 integrally formed with the lower case member 5 and the upper case member 7 and joined to each other. A belt chamber 23 of the electric motor storage room 22 is defined. That is, a rotary brush chamber 19 is formed on the front side by the front and rear partition wall 15 extending in the left-right direction and having the communication port 24 opened at the center, and a pair of left and right partition walls 16, 16 extending rearward from both side edges of the communication port 24, A ventilation chamber 21 and a motor storage chamber 22 facing the substrate storage chamber 20 and the communication port 24 are formed side by side in the lateral direction, and a partition wall 17 formed on both sides of the rotating brush chamber 19 and a motor storage chamber are formed. The partition wall 18 formed on one side of the chamber 22 forms a belt chamber 23 beside the rotating brush chamber 19 and the electric motor storage chamber 22.

A dust suction port 25 is formed on the lower surface of the suction port main body 1 so as to face the rotary brush chamber 19, and the opening 2 covering the entire upper surface in front of the front and rear partition walls 15 is also formed in the rotary brush chamber.
You are facing 19. Further, an insertion hole 26 is formed on the rear surface of the suction port main body 1 so as to face the ventilation chamber 21.

Further, a plurality of engagement holes 27 are formed on the front surface of the suction port main body 1, that is, on the front surface of the lower case member 5. On the front surface of the upper case member 7, an engagement step 28 having a substantially L-shaped side surface is formed, and engagement protrusions (not shown) are formed at both ends.

A cushion 29 made of an elastic material such as rubber is fixed to the front surface of the upper case member 7 and the upper surface of the engaging step 28 so as to be able to freely contact and separate from the rear surface of the lid 4. The buffer 29 may be fixed to the lid 4.

On the other hand, a connecting pipe 31 is provided at the rear part of the suction port main body 1 so as to be rotatable by a predetermined angle. The connecting pipe 31 has a rotating pipe 32 having a substantially cylindrical rear part, It comprises a bent cylindrical connection tube 33 fitted and connected to the rear part so as to be rotatable in the circumferential direction. A semi-cylindrical portion 34 having an open front surface is formed at the front of the rotating tube 32, and support shaft portions 35, 35 are formed on both sides of the semi-cylindrical portion 34 so as to project outward in the left-right direction, respectively. ing. The semi-cylindrical portion 34 has its support shaft portions 35, 35 on both sides rotatably fitted in bearing holes 36, 36 formed in the joint portion between the left and right partition walls 16, 16 on both sides of the ventilation chamber 21. Then, it is rotatably supported in the ventilation chamber 21 in the front-rear direction. Further, the connection pipe 33 protrudes rearward through the insertion hole 26 of the ventilation chamber 21.

Further, a connector 37 is fixed to the outer peripheral surface of the connection pipe 33, and one end of a cord 38 is connected to the connector 37. The cord 38 is guided into the substrate storage chamber 20 from the rear surface of the suction port main body 1, and the other end of the code 38 is connected to a circuit board 39 supported and fixed in the substrate storage chamber 20.

Further, a motor 41 as a rotary driving body is elastically supported by a pair of rubber supports 42 and 43 in the motor housing chamber 22 of the suction port main body 1, and a rotating shaft 44 of the motor 41 is connected to the belt chamber 23. It is projected into. A gear-shaped pulley 45 is fixed to the rotating shaft 44.

Further, a support groove 46 is formed on the lower surface of the suction port main body 1 and is located slightly behind the front and rear partition wall 15 and extends in the left-right direction. A seal lip or a fixed brush 47 that is in close contact with the floor is provided in the support groove 46. Fitted and fixed. And the support groove 46
The circuit board 39 and the electric motor 41 are electrically connected via a lead wire 48 inserted into a gap between the motor and the fixed brush 47.

On the other hand, reference numeral 51 denotes a rotating brush. The rotating brush 51 is formed by implanting a plurality of brush bristles 52 on an outer peripheral surface of a substantially cylindrical brush base 51a. In addition, rotating shafts 53 are fixed to both end surfaces of the rotating brush 51, respectively. Further, a gear-shaped pulley 54 is fixed to one end of the rotating brush 51 with respect to the rotating shaft 53. The bearings 55 are rotatably fitted to the rotating shafts 53, 53, respectively.

In addition, a rotating brush chamber 19 is provided at both ends in the suction port main body 1.
Groove-shaped bearing portions 56, 56, which are located on the sides of the groove, and open to the opposite surface and the upper surface, respectively. The two bearings 55, 55 of the rotary brush 51 are supported by these two bearing portions 56, 56 in a detachable and non-rotatable manner so as to be vertically movable, and the rotary brush 51 is rotatable in the rotary brush chamber 19. It is supported by. Both ends of the rotating brush 51 are rotatably and vertically moved through oblong holding holes 57, 57 formed in the partition walls 17, 17 on both sides of the rotating brush chamber 19.

An endless timing belt 58 made of glass fiber reinforced rubber or the like is stretched between the pulley 54 of the rotating brush 51 and the pulley 45 of the electric motor 41 located in the belt chamber 23.

On the other hand, the front edge of the lid 4 has an engagement hole 27 of the main body case 3.
A plurality of L-shaped locking claw portions 61, 61, which are systematically suspended, are integrally provided. On the rear side of both ends of the lid 4, box-shaped support recesses 62, 62 are formed. On the lower surfaces of the support recesses 62, 62, holding grooves 63,
63 are formed respectively. Then, both support recesses 62, 6
In FIG. 2, knobs 64, 64 are provided with holding claws 65, 65 and holding grooves 63, each having a substantially L-shaped side surface suspended from the knobs 64, 64.
Each of them is supported so as to be slidable left and right by engaging with 63. On the rear surfaces of the knobs 64, 64, locking grooves (not shown) that are engaged with and disengaged from the engaging projections of the main body case 3 are formed.

In addition, a boss 66 is integrally provided on the lower surface of the lid 4 at a position facing the bearing 55 at an end of the rotating brush 51 opposite to the pulley 54. And this boss 66 has a rotating brush
A coil spring 67 as an elastic body for urging the bearing 55 downward is fitted and held in contact with a bearing 55 at an end opposite to the pulley 54 of the 51 from above.

Further, as shown in FIG. 6, a plurality of ribs 69, 69 extending in the front-rear direction, that is, the direction orthogonal to the axial direction of the rotating brush 51, are provided on the lower surface side of the lid 4, that is, the inner surface that is the non-appearance side.
Are integrally formed. The pitch P _{0 of the} ribs 69 is a non-integer multiple of the wavelength λ (= c / f ₀ , c: sound speed) determined by the frequency f _{0 of} the vibration generated by the rotation of the rotating brush 51.

 Next, the operation of the above embodiment will be described.

At the time of cleaning, the suction port main body 1 is connected through a cleaner main body hose (not shown) and an extension pipe. When the connection pipe 33 of the suction port body 1 is fitted to the extension pipe, the connector 37 provided on the connection pipe 33 is connected to the connector provided on the extension pipe (not shown). A power supply circuit in the cleaner body and a circuit in the suction port are electrically connected via a power supply line provided along the line.

The rotating force of the electric motor 41 is transmitted to the rotating brush 51 via a timing belt 58 stretched between a pulley 45 fixed to the rotating shaft 44 and a pulley 54 fixed to the rotating brush 51, and rotates. The rotating brush 51 scrapes dust from the carpet or the like. Further, the dust that has been scraped is sucked from the dust suction port 25 of the suction port body 1 by driving the electric blower in the cleaner body, and the rotating brush chamber 19 and the communication port are connected.
24, the ventilation chamber 21, the communication pipe 31, the extension pipe and the hose are guided to the dust collection chamber in the cleaner body.

During the rotation of the rotating brush 51, the vibration of the rotating brush 51 on the pulley 54 side of the rotating brush 51 is absorbed by the tension of the timing belt 58. On the other hand, on the side of the rotating brush 51 opposite to the pulley 54, a coil spring 67 that elastically supports the bearing 55 at the opposite end absorbs the vibration of the rotating brush 51.

Therefore, according to the above embodiment, the vibration of the rotating brush 51 is absorbed, so that noise can be prevented and noise can be reduced. It should be noted that the noise reduction effect according to the above-described embodiment is almost the same as the conventional noise reduction effect when the bearings 55 at both ends of the rotating brush 51 are urged by the coil spring 67 provided on the lid 4. Have been.

In addition, as described above, the structure in which the coil spring 67 is provided only on the other end side is different from the case where the conventional dual bearings 55 are both urged by the coil spring 67, so that the rotation through the coil spring 67 is performed. The amount of vibration transmitted from the brush 51 to the lid 4 is halved, the vibration of the lid 4 can be further suppressed, and noise can be further reduced. Also a rotating brush
Since the force for biasing 51 downward, that is, toward the surface to be cleaned such as the floor surface, is also halved, the brush bristles of the rotating brush 51 are used.
Unpleasant noise when the 52 hits the floor can also be reduced. Furthermore, since there is only one coil spring 67 provided on the lid 4,
The number of parts is reduced, the structure is simplified, and the assemblability can be improved.

Further, the ribs 69, 69 formed on the lid 4
Is a non-integer multiple of the frequency of the vibration sound generated due to the rotation of the rotating brush 51.
Can be prevented from resonating with the rotating brush 51 to amplify the vibration sound of the rotating brush 51, the propagation of the vibration from the rotating brush 51 to the lid 4 can be reduced, and the vibration of the lid 4 and the accompanying noise can be reduced. It can be further suppressed.

Further, since the cover 4 and the main body case 3 are not in direct contact with each other and the bumper 8 and the buffer 29 made of an elastic member are interposed therebetween, the entire cover 4 is elastically supported. Therefore, propagation of vibration between the lid 4 and the main body case 3 can be further reduced, and noise can be further reduced.

Therefore, since the vibration and noise can be reduced, the user having the grip portion of the hose (not shown) does not feel uncomfortable vibration and can clean quietly.

In addition, when removing dust stuck to the rotating brush 51 with cleaning, the lid 4 is opened to open the opening 2,
The rotating brush 51 is cleaned through the opening 2. Then, in order to open the lid 4, the knobs 64, 64 are slid, and the locking grooves (not shown) of the knobs 64, 64 are disengaged from the engaging projections of the main body case 3. Locking claw 61
From the engaging hole 27 of the main body case 3. When the cover 4 is closed, the locking claw 61 is first engaged with the engagement hole 27, and then the lower edge of the rear surface of the cover 4 is engaged with the engagement step of the main body case 3.
28, then slide both knobs 64, 64,
The lid 4 is locked to the suction port body 1 by engaging the locking groove with the engaging projection.

Although the above embodiment has been described using the electric motor 41 as the rotary driving body, the rotary driving body may be a turbine rotated by the suction airflow.

Further, a rib extending in the lateral direction may be formed on the lower surface of the lid 4 so that the amplitude of the vibration may be reduced by adjusting the thickness of the lid 4.

(Effect of the Invention) According to the suction opening of the vacuum cleaner of the present invention, only the bearing at the end opposite to the pulley of the rotating brush is urged downward by the elastic body provided between the lid and the lid, Vibration is absorbed on the pulley side of the rotating brush by the belt stretched on the pulley, and vibration is absorbed on the opposite side of the rotating brush by the elastic body. As compared with the case where the bearings at both ends of the rotating brush are both urged by the elastic body provided between the cover and the lid, the structure is such that the elastic body is provided only on the side opposite to the pulley, so the structure can be simplified. The vibration transmitted from the rotating brush to the lid via the elastic body can be reduced, and the vibration noise of the lid can be reduced. Floor Also, the contact noise with the like can be reduced, and noise and vibration can be further reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along the line II of FIG. 4 showing an embodiment of the suction port of the vacuum cleaner of the present invention, and FIG. 2 is a sectional view taken along the line II-II of FIG.
FIG. 3 is a sectional view taken along the line III-III of FIG. 4, FIG. 4 is a horizontal sectional view of the same, FIG. 5 is a perspective view of the same, and FIG. 6 is a lower perspective view of the same lid. 2 ... opening, 3 ... body case, 4 ... lid, 19 ...
Rotating brush chamber, 25 ... dust suction port, 41 ... electric motor as rotary drive, 44 ... rotating shaft of electric motor, 51 ... rotating brush,
53: rotating shaft of rotating brush, 54: pulley, 55: bearing, 56: bearing, 58: belt, 67: coil spring as an elastic body, 69: rib.

Claims (2)

(57) [Claims] 1. A main body case in which a rotary brush chamber is provided, a dust suction port is provided on a lower surface facing the rotary brush chamber, and an opening is provided on an upper surface, and a lid for opening and closing the opening of the main body case. Body, a rotating brush disposed in the rotating brush chamber of the main body case, a pulley provided at one end of the rotating brush, and rotatably mounted on rotating shafts provided at both ends of the rotating brush. Bearings movably supported by bearing portions provided at both ends of the rotating brush chamber and rotatably supporting the rotating brush, and a rotating driver provided in the main body case and driving the rotating brush. A rotation transmission belt stretched around a rotation shaft of the rotation driving body and the pulley of the rotation brush, and a rotation transmission belt provided between the lid and the bearing of the rotation brush. An elastic body for urging the receiver downward, wherein the elastic body is provided only on the bearing side of the end opposite to the pulley of the rotating brush. . 2. A lid having an inner surface extending in a direction perpendicular to the rotating brush and having a natural frequency of the lid being a non-integer multiple of a frequency of a vibration sound generated due to the rotation of the rotating brush. The suction opening of a vacuum cleaner according to claim 1, wherein the suction opening is provided.