JP5470319B2 - Vacuum cleaner mouthpiece and electric vacuum cleaner using the mouthpiece - Google Patents

Description

  The present invention relates to a mouthpiece of a vacuum cleaner and a vacuum cleaner using the mouthpiece.

  The current general vacuum cleaner has a vacuum cleaner body equipped with a dust collector, a floor suction body for sucking dust on the floor, and an extension pipe or suction hose between the vacuum cleaner body and the floor suction body. It has a structure called a connected canister type. This vacuum cleaner main body has a dust collector and an electric blower inside thereof, and has a structure that can be freely moved via wheels. On the other hand, in order to clean the floor surface, the floor suction body includes a rotating brush and its driving unit (electric motor) inside, and the rotating brush is rotated by the driving unit (electric motor) so that dust on the floor surface is collected. It is structured to scrape up and suck this.

  Large diameter pulleys, small diameter pulleys, and toothed belts are used as means for transmitting a driving force from the brush driving motor to the rotating brush. A large-diameter pulley is provided on the rotating brush, and a small-diameter pulley is provided on the motor side, and a toothed belt is connected between them to transmit the driving force from the brush driving motor to the rotating brush.

  In general, the holder for holding the motor-side pulley bearing and the holder for holding the brush-side pulley bearing are configured separately, and each is detachably attached to the lower suction case ( Patent Document 1, Patent Document 2).

JP 2009-219620 A JP 2008-111943 A

  Vibration occurs when the toothed belt meshes with the motor-side pulley and the brush-side pulley. This meshing vibration is transmitted to the housing of the mouthpiece, which is one of the major causes of mouthpiece noise. However, in the conventional structure, the holder for holding the bearing of the motor side pulley and the holder for holding the bearing of the brush side pulley are configured separately, and each is detachably attached to the lower case of the suction body. Suction noise was generated due to the external dimension error of the holder and the clearance between the holder and the lower case of the suction body.

  The objective of this invention is providing the mouthpiece of the vacuum cleaner which reduced the noise, and the vacuum cleaner using this mouthpiece.

In order to solve the above-described problem, in this embodiment, a rotary cleaning body having a rubbing member that rubs a surface to be cleaned, a drive unit that drives the rotary cleaning body, and a suction body housing that houses the rotary cleaning body, As a means for transmitting a driving force from the drive unit to the rotary cleaning body, a rotary cleaning body pulley is provided on the rotary cleaning body, and a drive part pulley is provided on the drive part side, and a suction port of the vacuum cleaner connected between the belts in the body, Chi also bearing holding member for holding the rotary cleaning body pulley-side bearing and the drive unit pulley side bearing integrally, shaft receiving holding member is characterized by covering at least a portion of said belt.

  According to the present invention, the rotary cleaning body having a rubbing member that rubs the surface to be cleaned, the drive unit that drives the rotary cleaning body, and the suction body housing that houses the rotary cleaning body, the drive As a means for transmitting the driving force from the part to the rotary cleaning body, the rotary cleaning body is provided with a rotary cleaning body pulley, the drive part pulley is provided on the drive part side, and the suction part of the vacuum cleaner connected with a belt therebetween, the drive part pulley By having a bearing holding member that integrally holds the side bearing and the rotary cleaning body pulley side bearing, errors in the distance between the shafts of the motor-side small-diameter pulley and the brush-side large-diameter pulley and assembly variations can be reduced. As a result, the meshing vibration can be reduced, and the noise of the mouthpiece can be reduced.

  Furthermore, the bearing holding member has a substantially box shape, and the rigidity of the bearing holding portion can be increased by using a material that is more rigid than the mouthpiece housing, so that vibration propagation is suppressed, and the noise of the mouthpiece is reduced. There is an effect that can be reduced.

  In addition, since the bearing holding member has a substantially box-like structure, the sound insulation performance is improved, so that the noise of the suction body can be reduced.

  Alternatively, since the bearing holding member covers the drive unit pulley, the rotary cleaning body pulley, and the belt, the sound insulation performance is improved, so that the noise of the mouthpiece can be reduced.

The external view of the vacuum cleaner by this form example. The top view of the suction body of the vacuum cleaner by this form example. The bottom view of the mouthpiece of the vacuum cleaner by this form example. The center sectional view of the mouthpiece of the vacuum cleaner by this form example. The top view of the suction body of the vacuum cleaner by this form example. The AA 'sectional view of the mouthpiece of the vacuum cleaner by this form example. The exploded view of the mouthpiece of the vacuum cleaner by this form example. The drive part exploded view of the suction body of the vacuum cleaner by this form example. The drive part side view of the suction body of the vacuum cleaner by this form example. The drive part bottom view of the suction body of the vacuum cleaner by this form example. Measured value of vibration acceleration. The rotary brush removal exploded view of the mouthpiece by this form example. BB 'sectional drawing of the suction body of the vacuum cleaner by this form example. The rotary brush removal exploded view of the mouthpiece by the other form example of this invention.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an external view of a vacuum cleaner according to the present invention. In FIG. 1, 101 is an electric vacuum cleaner main body, 102 is a suction hose, 103 is a hand handle, 104 is an operation part, 105 is an extension pipe, and 106 is a mouthpiece main body. Although not shown, an electric blower that generates suction force and a dust collection chamber that collects dust are provided inside the main casing that forms the outline of the vacuum cleaner main body 101. A dust collection chamber is provided on the suction side. Although not shown, the suction hose 102 and the extension pipe 105 are provided with a power supply line for supplying power to the suction mouth body 106.

  FIG. 2 shows a top view of the mouthpiece of the vacuum cleaner according to this embodiment. In FIG. 2, 201 is a front part of the upper case of the mouthpiece, 202 is a universal joint pipe having an air passage including dust inside, 203 and 204 are contact pins for supplying power to the drive motor in the mouthpiece, Reference numeral 206 denotes a rear portion of the upper case body.

  FIG. 3 shows a bottom view of the mouthpiece of the vacuum cleaner according to this embodiment. In FIG. 3, 301 is a suction case lower case, 302 is a rotating brush (rotary cleaning body), 303 is a brush drive switch, 304 is a brush cover for removing the rotating brush 302, 305 is a brush cover on the belt side, and 306 is large. It is a wheel. The mouthpiece lower case 301, the upper case front portion 201, and the upper case rear portion 206 are collectively referred to as a mouthpiece housing. The brush drive switch 303 includes a wheel, and is attached via a spring (not shown) so that the wheel always protrudes from the bottom surface of the mouthpiece body 106. The brush drive switch 303 turns off the rotation of the rotating brush 302 when the wheel is protruding, and turns on the rotation of the rotating brush 302 when the wheel touches the floor or the like and is stored in the mouthpiece body 106. Safety is enhanced by the state. A large wheel 306 is provided at the rear end of the mouthpiece main body 106, and these are subjected to the stress of forward and backward movement and rotation operated by the hand handle 103, so that the bottom face of the mouthpiece main body 106 is brought into close contact with the floor surface. Thus, the operating performance of the mouthpiece is improved.

  FIG. 4 shows a central cross-sectional view of the mouthpiece of the vacuum cleaner according to this embodiment. In FIG. 4, 302 is a rotating brush, and 401 is a brush chamber that houses the rotating brush 302.

  The brush chamber 401 and the extension pipe 105 communicate with each other via a universal joint pipe 202 having an air passage including dust inside. The dust wound up by the rotating brush 302 is conveyed to the extension pipe 105 through the flow path indicated by the arrow 402, and further to the dust collecting chamber of the electric vacuum cleaner main body 101 through the suction hose 102. When the extension pipe 105 is not attached to the suction body, the dust wound up by the rotating brush 302 is carried to the dust collecting chamber of the vacuum cleaner body 101 through the suction hose 102 through the flow path indicated by 402. It is.

  FIG. 5 shows a top view of the mouthpiece with the upper case front part 201 and the upper case rear part 206 of the mouthpiece of the vacuum cleaner according to the present embodiment removed. In FIG. 5, reference numeral 501 denotes a brush driving motor, 502 a bearing holder according to the present embodiment, and 503 a circuit board for controlling the brush driving motor 501. Although not shown, the contact pins 203, 204, the brush driving motor 501 and the circuit board 503 are connected by a power cord. When the suction body and the extension pipe 105 or the suction body and the suction hose 102 are attached, the contact pins 203 and 204 and a power line (not shown) are connected, and power is supplied to the suction body.

  FIG. 6 is a cross-sectional view taken along the line AA ′ in FIG. In FIG. 6, 601 is a small pulley (drive pulley) on the motor side, 602 is a large pulley (rotary cleaning body pulley) on the brush side, 603 is a toothed belt, and 604 is for increasing the winding angle of the toothed belt. This is a tension pulley.

  FIG. 7 shows a component development view of the mouthpiece in the present embodiment. After the motor-side small-diameter pulley 601, the brush-side large-diameter pulley 602, the toothed belt 603, and the tension pulley 604 are assembled in the bearing holder 502, the brush-side motor 501 is assembled in the lower mouthpiece case 301.

  FIG. 8 is a development view of components of the suction body drive unit. In FIG. 8, reference numeral 801 denotes a bearing that rotates and holds the shaft of the brush driving motor 501, 802 denotes a bearing that rotates and holds the shaft of the brush-side large-diameter pulley 602, and 803 is integrally connected to the brush-side large-diameter pulley 602 through the shaft. A rotating fitting portion 804 is a rotating brush side fitting portion that is detachable from the fitting portion 803 and transmits a rotational force.

  In FIG. 9, the side view of the drive part of a suction body is shown. In FIG. 9, 901 represents the inter-axis distance between the motor-side small-diameter pulley 601 and the brush-side large-diameter pulley 602. Since the motor-side bearing 801 and the brush-side bearing 802 are integrally held by the bearing holder 502 and are attached to the lower case together with the bearing holder 502, an error in the inter-shaft distance 901 between the motor-side small-diameter pulley 601 and the brush-side large-diameter pulley 602. And assembly variation can be reduced.

  In FIG. 10, the bottom view of the drive part of a suction body is shown. In FIG. 10, reference numeral 1001 denotes an anti-vibration rubber for the electric motor 503. The bearing holder 502 has a structure that also holds the electric motor 503 through vibration-proof rubber.

  In order to reduce the noise of the suction port, it is desirable to minimize this meshing vibration. It was found that this meshing vibration increases when the distance between the shafts of the motor-side small pulley and the brush-side large pulley deviates from the design value.

  FIG. 11 shows measured values of vibration acceleration. In FIG. 11, the horizontal axis indicates a deviation from the design value of the inter-axis distance 901 between the motor-side small-diameter pulley 601 and the brush-side large-diameter pulley 602. The vertical axis represents the meshing vibration acceleration of the motor-side small-diameter pulley 601, the brush-side large-diameter pulley 602, and the toothed belt 603. Incidentally, the vibration acceleration when the inter-axis distance 901 is a design value is used as a reference (0 dB). The inter-axis distance 901 has an optimum value (design value) from the number of teeth of the motor-side small-diameter pulley 601, the number of teeth of the brush-side large-diameter pulley 602, and the number of teeth of the toothed belt 603. FIG. 11 shows that the vibration acceleration increases when the inter-axis distance 901 deviates from the design value. This vibration acceleration is transmitted to the housing of the mouthpiece, which is one of the major causes of mouthpiece noise. Conventionally, the inter-shaft distance 901 has been designed to be an optimum value. However, in the conventional structure, the holder for holding the motor-side bearing and the holder for holding the brush-side bearing are configured separately, and each has a suction mouth. Since it is detachably attached to the lower body case, errors in the external dimensions of the individual holders and the clearance between the holder and the lower case of the mouthpiece are errors in the inter-axis distance. However, in this embodiment, since the motor-side bearing 801 and the brush-side bearing 802 are held together by the bearing holder 502, errors in the inter-shaft distance 901 between the motor-side small diameter pulley 601 and the brush-side large diameter pulley 602 and assembly variations. Can be reduced.

  FIG. 12 shows an exploded view of the rotary brush 302 of the mouthpiece. In FIG. 12, reference numeral 1201 denotes a lever for removing the brush cover 304. When removing the rotating brush 302, first the lever 1201 is opened and the brush cover 304 is removed. Thereby, the rotary brush 302 can be lifted and removed from the brush cover 304 side. Conversely, when the rotating brush 302 is attached, the fitting portion 804 of the rotating brush 302 and the large-diameter pulley side fitting portion 803 are engaged with each other, the rotating brush 302 is accommodated in the brush chamber 401, the brush cover 304 is attached, and the lever 1201 is closed. Thus, since it is not necessary to remove or attach the toothed belt 603 from the large-diameter pulley 602 when removing the rotating brush, it is easy to remove the rotating brush.

  FIG. 13 is a cross-sectional view taken along the line BB ′ in FIG. However, the rotating brush 302 is in a removed state. In FIG. 13, since the bearing holder 502 and the brush cover 305 are configured to cover the outer periphery of the large-diameter pulley-side fitting portion 803, dust and hair enter the large-diameter pulley 602 side from the brush chamber 401. The structure is difficult to do.

  Hereinafter, the operation of the embodiment according to this example will be described in detail with reference to the drawings.

When the vacuum cleaner user operates the operation unit 104 disposed near the hand handle 103, the electric blower in the vacuum cleaner main body 101 is operated in an operation mode according to the operated switch.
The suction force generated by the electric blower reaches the suction mouth main body 106 through the suction hose 102 and the extension pipe 105. At the same time, the power supplied from the power lines provided in the suction hose 102 and the extension pipe 105 drives the brush driving motor 501 through the contact pins 203 and 204. As a result, the small-diameter pulley 601 attached to the brush driving motor 501 rotates, and this power is transmitted to the large-diameter pulley 602 by the toothed belt 603. The rotation of the large-diameter pulley 602 is transmitted to the rotating brush 302 via the fitting portions 803 and 804, and the rotating brush 302 rotates.

  The rotary brush 302 has a function of cleaning the carpet having a long bristle and a function of allowing the mouthpiece body 106 to move forward by the rotational force of the brush when cleaning on the carpet in order to realize easy operability. A large driving torque is required. Therefore, a large driving torque is obtained by increasing the number of teeth of the large-diameter pulley 602 and decreasing the number of teeth of the small-diameter pulley 601 to increase the reduction ratio.

  Since large power is transmitted to the toothed belt 603 in this way, vibration occurs when the toothed belt 603 meshes with the motor-side small-diameter pulley 601 and the brush-side large-diameter pulley 602. The meshing vibration increases as the deviation from the design value of the inter-axis distance 901 increases.

  However, in this embodiment, since the motor-side bearing 801 and the brush-side bearing 802 are held together by the bearing holder 502, errors in the inter-shaft distance 901 between the motor-side small diameter pulley 601 and the brush-side large diameter pulley 602 and assembly variations. Can be reduced.

  Thereby, there exists an effect that the inlet noise resulting from a meshing vibration can be reduced.

  In the present embodiment, since the bearing holder 502 has a substantially box structure, the rigidity of the bearing portion can be increased as compared with the prior art, thereby reducing the meshing vibration from propagating to the housing of the mouthpiece body. The suction noise can be reduced.

  Further, the twisting motion of the bearings 801 and 802 can also be suppressed.

  For this reason, the bearing holder 502 is desirably made of a material having higher rigidity than the suction housing such as glass fiber reinforced nylon 66 or polyoxymethylene (POM).

  In this embodiment, since the bearing holder 502 has a substantially box structure, the motor-side small-diameter pulley 601, the brush-side large-diameter pulley 602, the toothed belt 603, and the tension pulley 604 can be covered entirely. There is an effect that the noise generated by the toothed belt 603, the motor-side small-diameter pulley 601, the brush-side large-diameter pulley 602, and the tension pulley 604 can be shielded to reduce suction noise.

  In the present embodiment, the rotating brush 302 and the brush-side large-diameter pulley 602 are separate bodies. However, as shown in FIG. 14, the brush cover 1405 is also provided when the rotating brush 1401 and the brush-side large-diameter pulley 1402 are integrated. And 1406 are removed, and the rotating brush 1401 is slid from the lateral direction to be attached to the toothed belt 1403, it is possible to attach an integrated bearing holder similar to the present invention.

DESCRIPTION OF SYMBOLS 101 Vacuum cleaner main body 102 Suction hose 103 Hand handle 104 Operation part 105 Extension pipe 106 Suction body 202 Universal joint pipe 203,204 Contact pin 302 Rotating brush (Rotating cleaning body)
306 Large wheel 401 Brush chamber 501 Brush driving motor 502 Bearing holder 601 Motor side small diameter pulley 602 Brush side large diameter pulley 603 Toothed belt 604 Tension pulleys 801 and 802 Bearings 803 and 804 Fitting portion

Claims (6)

A rotary cleaning body having a rubbing member for rubbing the surface to be cleaned; a drive unit that drives the rotary cleaning body; and a suction body housing that houses the rotary cleaning body; As a means for transmitting a driving force to the rotary cleaning body, in the suction body of the vacuum cleaner, the rotary cleaning body is provided with a rotary cleaning body pulley, the drive section pulley is provided on the drive section side, and a belt is connected therebetween.
Chi also the bearing holding member for holding integrally said said driver pulley side bearing rotary cleaning body pulley-side bearing,
The mouthpiece of the vacuum cleaner , wherein the bearing holding member covers at least a part of the belt . In the suction body of the electric vacuum cleaner according to claim 1,
The mouthpiece of the vacuum cleaner, wherein the bearing holding member has a substantially box structure and covers the drive unit pulley, the rotary cleaning body pulley, and the belt . In the mouthpiece of the vacuum cleaner of Claim 2 ,
The mouthpiece of the vacuum cleaner, wherein the bearing holding member is made of a material having rigidity higher than that of the mouthpiece housing . In the mouthpiece of the vacuum cleaner of any one of Claims 1 thru | or 3 ,
The mouthpiece of the vacuum cleaner, wherein the bearing holding member is made of glass fiber reinforced nylon 66 or polyoxymethylene (POM) . In the mouthpiece of the vacuum cleaner of any one of Claims 1 thru | or 4 ,
The mouthpiece of the vacuum cleaner , wherein the bearing holding member holds a part of the drive unit . An electric blower for generating a suction force, a cleaner body having a dust collecting portion for storing dust, and extension pipe, hose and, suction port of the electric vacuum cleaner according to any one of claims 1 to 5 And a vacuum cleaner having a body.