JP5817970B2 - Dust collector - Google Patents

Description

  The present invention relates to a dust collector that sucks dust or liquid into a tank.

  A conventional dust collector will be described with reference to FIG. In a conventional dust collector, a motor 803, a dust collecting fan (held inside the fan case 804) directly connected to the motor 803, and a switch 808 for starting / stopping the motor 803 include a head portion on the upper side of the main body 801. 802. The head portion 802 has a substantially circular shape when viewed from above due to the shape of the motor 803 and the dust collecting fan.

  A tank 805 for storing the sucked dust and the like is disposed under the circular head portion 802. The tank 805 is provided with a suction port 806 on the side surface for attaching and detaching a hose (not shown) that conveys dust and the like. A plurality of rotatable casters 807 are attached to the lower part of the tank 805. The tank 805 has an opening that opens upward. A plurality of clamps 809 are provided to fix and release the tank 805 and the head portion 802. Further, a substantially frustoconical filter 810 for filtering the sucked dust is provided at a substantially central portion inside the tank 805 so as to be engaged with an upper outer peripheral portion 805 a of the tank 805. The float 811 is disposed in the filter 810 and below the head portion 802, and is configured to be movable up and down along the axis 812. The float 811 rises according to the water level of the liquid sucked into the tank 805 when the sucked material is a liquid, and has a function of closing the vent hole 813 of the head portion 802 when the liquid level reaches a predetermined height. Have.

  In the above configuration, when the switch 808 is turned on, the motor 803 is activated and the dust collecting fan rotates, whereby a suction force is generated at the suction port 806 of the tank 805. Dust and the like pass through the suction port 806 by suction force, and are sucked into the tank 805 and filtered by the filter 810. Only the filtered clean air passes through the filter 810 and is discharged from the exhaust port 814 to the outside of the main body 801 of the dust collector. When the suction is continued, the dust separated by the filter 810 is accumulated (stored) in the tank 805. Further, the liquid sucked into the tank 805 is stored in the tank 805.

  The float 811 rises according to the water level of the liquid stored in the tank 805, and when the liquid level in the tank 805 reaches a predetermined height, the float 811 sucks into the vent hole 813 by the suction force generated by the dust collecting fan. And closes the vent 813. As a result, the collection of dust from the suction port 806 is stopped, and submergence of the head portion 802, ejection of liquid from the exhaust port 814, back flow of liquid from the suction port 806, and the like are prevented.

  When disposing of dust or liquid in the tank 805, the clamp 809 is released, the head 802 is lifted upward, removed from the tank 805, then the filter 810 is removed, and the dust or liquid in the tank 805 is discarded. To do. After disposal, the filter 810 and the head portion 802 are attached to the tank 805 and fixed with a clamp 809.

JP 2007-190304 A

  In workplaces where dust is generated, dust collectors with large tank capacity are often used. Further, during the work, the dust collector main body 801 may be routed by holding a hose (not shown) attached to the suction port 806. In the above-described prior art, since the motor 803 is provided at a position that rises upward from the tank 805 in the head portion 802, the position of the center of gravity is high and the stability is not good. For this reason, when working with a hose or the like during operation, the operation of the caster 807 cannot follow due to the operation method, a slight level difference in the floor, or the inclination, and the main body 801 easily loses its balance and falls easily. May be bad.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a dust collector having a low center of gravity position and good stability as compared with the prior art.

One embodiment of the present invention is a dust collector. This dust collector
A tank portion having a suction port;
A dust collecting fan for generating a suction force at the suction port;
A motor for rotationally driving the dust collecting fan;
A filter having a cylindrical side surface disposed in the tank portion;
The motor is located within the height range of the inner and the side surface of the side surface of the filter.

The tank portion has an opening at the top,
A head portion attached to the tank portion so as to cover the opening portion;
The top of the filter is an opening;
The head portion includes an upper head member, and a lower partition member that extends downward from the upper head member and extends below the opening of the filter and inside the side surface of the filter,
The motor and the dust collecting fan may be disposed in a space between the upper head member and the lower partition member.

  The upper head member may have a recess recessed downward, and the motor and the dust collecting fan may be disposed below the recess.

A case for housing the motor and the dust collecting fan;
The lower partition member includes a bottom surface portion on which the case is placed, a cylindrical side surface portion that rises from the bottom surface portion outside the case, and a flange portion that extends outward from the upper end side of the side surface portion, A flange portion may be detachably fixed to the upper head member, and an opening for air circulation may be formed in the bottom surface portion.

  An exhaust port penetrating between the flange portion and the upper head member may be provided.

  Speed increasing means may be provided between the motor and the dust collecting fan, and the dust collecting fan may be rotated at a higher rotational speed than the rotational speed of the motor.

  The motor may be a disk motor.

The disk motor has a rotor, a stator, and an output shaft,
The rotor includes a coil disk that rotates integrally with the output shaft,
The stator includes magnetic flux generation means for generating a magnetic flux penetrating the coil disk,
The coil disk may be rotated by an electromagnetic force between a current flowing in a coil pattern provided on the coil disk and a magnetic field generated by the magnetic flux generation means.

  A water level sensor that stops the motor when the liquid level reaches a predetermined height inside the tank portion may be provided.

  It should be noted that any combination of the above-described constituent elements, and those obtained by converting the expression of the present invention between methods and systems are also effective as aspects of the present invention.

  According to the present invention, since at least a part of the motor is located inside the side surface of the filter and within the height range of the side surface, it is possible to realize a dust collector having a low center of gravity position and excellent stability as compared with the prior art. is there.

Side view precipitator, partly a cross section according to the shape condition of the present invention. FIG. 2 is an enlarged cross-sectional view of a motor and a dust collection fan held in the case of FIG. 1. FIG. 3 is a schematic plan view of a stator of the motor shown in FIGS. 1 and 2. (A) is a top view of the coil disk shown in FIG. (B) is a bottom view of the coil disk. The side view which made the cross section a part of the dust collector which concerns on a reference example . The side view which made the cross section a part of the conventional dust collector.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or equivalent component, member, process, etc. which are shown by each drawing, and the overlapping description is abbreviate | omitted suitably. In addition, the embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

1, the dust collector 1 according to the shape condition of the present invention, is a side view and a partially cutaway. The dust collector 1 includes a head portion 2, a motor 3, a dust collection fan 4, a tank portion 5, a caster 7, a switch 8, a filter 10, a case 11, and a water level sensor 16.

  For example, the resin tank portion 5 has a generally cylindrical shape with a bottom as a whole, has an upper opening, a suction port 6 on a side surface, and three or more rotatable casters 7 attached to the bottom portion. An unillustrated hose (suction nozzle) for sucking dust and liquid is detachable from the suction port 6. The filter 10 has a cylindrical side surface 10a extending in the vertical direction in the tank part 5 and has an opening in the upper part, for example, has a substantially truncated cone shape. The filter 10 is engaged with the upper outer periphery 5a of the tank part 5 to remove dust and the like. Shut off (separate). For example, a hook 101 made of rubber or the like sewn around the upper edge of the filter 10 is hooked on the upper outer periphery 5 a of the tank unit 5. The air taken in from the suction port 6 is filtered by the filter 10 and enters the inside of the filter 10, while the suction material (dust etc.) from the suction port 6 is separated by the filter 10 and is filtered in the tank unit 5. Is stored outside of.

  The head unit 2 covers the upper opening of the tank unit 5 and holds the motor 3 and the dust collecting fan 4 as described later. The motor 3 and the dust collecting fan 4 are disposed inside the side surface 10a of the filter 10 and within the height range of the side surface 10a while being held in a case 11 made of resin, for example. A plurality of clamps 9 for fixing / releasing the tank unit 5 are provided on the head unit 2.

  For example, the resin head portion 2 includes an upper head member 21 and a lower partition member 22. The upper head member 21 has a large-diameter recessed portion 21b that is recessed downward at the center of an annular (for example, annular) flat portion 21a. A switch 8 for starting and stopping the motor 3 is provided on the upper surface of the flat portion 21a. The lower partition member 22 extends downward from the flat portion 21 a of the upper head member 21 and extends below the upper opening of the filter 10 and inside the side surface 10 a of the filter 10. The case 11, the motor 3, and the dust collecting fan 4 are disposed in a space between the upper head member 21 and the lower partition member 22 and below the recess 21 b of the upper head member 21.

  The lower partition member 22 includes a bottom surface portion 22a, a side surface portion 22b, and a flange portion 22c. The bottom surface portion 22a has an annular shape (for example, an annular shape), and the central portion is, for example, a circular opening 13 for air circulation. The case 11 is placed (pressed) on the bottom surface portion 22a with an annular (for example, annular) rubber or other sealing member 115 interposed therebetween. The side surface portion 22 b is cylindrical (for example, cylindrical), rises from the outer edge portion of the bottom surface portion 22 a, and extends upward on the outside of the case 11. The flange portion 22c extends outward from the upper end side of the side surface portion 22b. The flange portion 22c and the flat portion 21a of the upper head member 21 are detachably fixed to each other by, for example, screwing or the like.

  An exhaust port 14 is provided between the flange portion 22c and the flat portion 21a. The exhaust port 14 may be provided over the entire circumference between the flange portion 22c and the flat portion 21a with the vertical direction as an axis, or may be provided only in a predetermined angle range. The number is also arbitrary. In front of the exhaust port 14, a sponge 141 is held by the flange portion 22c. The sponge 141 is a kind of filter that allows air to pass while blocking dust. Even if there is dust that has entered the inside of the filter 10, it is blocked by the sponge 141 and is prevented from being discharged from the exhaust port 14. The lower surface of the outer edge portion of the flange portion 22 c is pressed against the upper outer periphery 5 a of the tank portion 5 with a seal member 102 such as an annular (for example, annular) rubber and the hook 101 of the filter 10 interposed therebetween.

  In order to prevent the motor 3 from being submerged when the sucked material is liquid, a water level sensor 16 is provided on the lower surface of the bottom surface portion 22a and connected to a power supply circuit (not shown). The water level sensor 16 may be a known one. When the liquid level reaches the position of the water level sensor 16, the water level sensor 16 detects it electrically, for example, and stops the energization of the motor 3, or warns the worker by sound or light, or both. Is done.

  In the case 11, the motor 3 and the dust collecting fan 4 are in a positional relationship in which the motor 3 is on the top and the dust collecting fan 4 is on the bottom. The dust collecting fan 4 rotates integrally with the output shaft 31 of the motor 3, or is connected to the output shaft 31 through speed increasing means and rotates faster than the motor 3 as will be described later with reference to FIG. 2. The dust collecting fan 4 has a two-stage configuration in the example of FIG. 1, and a rectifying plate 42 is fixed between the upper and lower stages.

  FIG. 2 is an enlarged cross-sectional view of the motor 3 and the dust collecting fan 4 held in the case 11. In this figure, the dust collection fan 4 is shown by 1 step | paragraph structure. Between the output shaft 31 of the motor 3 and the rotating shaft 41 of the dust collecting fan 4 is provided speed increasing means 18 for connecting both shafts so that power can be transmitted. The rotating shaft 41 of the dust collecting fan 4 is rotatably supported by bearings 713 and 714 fixed to the case 11. In the illustrated example, the speed increasing means 18 is a combination of gears. As the speed increasing means 18, a friction wheel, a belt, or the like can be used instead of the gear. By providing the speed increasing means 18, the dust collecting fan 4 rotates at a higher rotational speed than the rotational speed of the motor 3. A plurality or a plurality of air holes 11a are arranged in the case 11 so as to go around the side surface. An air intake opening 11 b is provided on the bottom surface of the case 11.

  The motor 3 is a disk motor, and its configuration may be a known one, but an exemplary configuration will be described below.

  The stator of the motor 3 includes a magnet 36 as magnetic flux generating means, and a ring-shaped upper yoke 37 and lower yoke 38 that are soft magnetic bodies, and each is fixed to the case 11. FIG. 3 is a schematic plan view of the stator of the motor 3 shown in FIG. As shown in this figure, for example, ten disk-shaped magnets 36 are arranged on the circumference at equal angular pitches. The center of the circumference substantially coincides with the rotation center of the motor 3. Adjacent magnets 36 have different top magnetic poles. The upper yoke 37 and the lower yoke 38 increase the magnetic flux density applied to the rotor coil pattern to be described later.

  In the rotor of the motor 3, at least one coil disk 33 is laminated and integrated on the lower surface of the flange 32 fixed to or integrated with the output shaft 31 by the adhesive layer 501, and the commutator disk 34 is mounted on the upper surface of the flange 32 by the adhesive layer 502. Stacked and integrated. The output shaft 31 is rotatably supported by bearings 711 and 712 fixed to the case 11. A current is supplied to a coil pattern provided on the coil disk 33 from a pair of brushes 35 fixed to the case 11 via a commutator disk 34.

  FIG. 4A is a plan view of the coil disk 33 shown in FIG. FIG. 4B is a bottom view of the coil disk.

  The coil disk 33 has coil patterns 92 on both sides of a disk-shaped insulating substrate 90 (for example, an insulating resin substrate such as a glass fiber reinforced epoxy resin substrate). A through hole 91 in the center of the insulating substrate 90 is for inserting the output shaft 31 of FIG. A plurality of through holes 367 are provided for electrical connection with the commutator disk 34 (or other layer coil disk).

  The coil pattern 92 made of copper or other conductive material has 20 partial coil pattern groups 920 each made up of four rows of patterns having substantially the same width close to each other. The partial coil pattern group 920 is formed by sequentially connecting the inner communication pattern group 92A, the radial pattern group 92B, and the outer communication pattern group 92C. The inner side connection pattern groups 92A on both sides are electrically connected to each other through through holes 921 formed in the vicinity of the end portions. The outside contact pattern groups 92C on both sides are electrically connected to each other through through holes 922 formed in the vicinity of the end portions. The radial pattern group 92B extends radially outward from the center side of the insulating substrate 90 and passes the inner contact pattern group 92A and the outer contact pattern group 92C. The radial pattern groups 92B on both sides exist at substantially the same position when viewed in the axial direction. The radial pattern group 92 </ b> B on each surface exists at an equiangular pitch from the center of the insulating substrate 90. The radial pattern group 92B is positioned directly above the arrangement circumference of the magnets 36 shown in FIG. 3 (the circumference around which the centers of the magnets 36 are arranged). That is, the radial pattern group 92B passes immediately above the magnet 36 as each coil disk rotates. A rotational force is obtained by an electromagnetic force between the current flowing in the radial pattern group 92B and the magnetic field generated by the magnet 36 (passing through the coil disk in the axial direction of the output shaft).

  When working with the dust collector 1, the operator presses the switch 8. Then, electric power is supplied to the motor 3 from a power cable (not shown) connected to the commercial power source, and the motor 3 is rotationally driven. As the motor 3 rotates, the dust collecting fan 4 also rotates, and a suction force is generated at the suction port 6. Thereby, dust or the like is sucked together with air from a hose (not shown) connected to the suction port 6 and enters the tank portion 5 from the suction port 6.

  The air flow is indicated by arrows in FIG. That is, air enters the case 11 from the suction port 6 through the filter 10, the opening 13 in the bottom surface portion 22 a of the lower partition member 22, and the opening 11 b in the bottom surface of the case 11. Then, it comes out of the case 11 from the air hole 11 a on the side surface of the case 11, flows upward inside the side surface portion 22 b of the lower partition member 22, passes through the sponge 141, and passes from the exhaust port 14 to the outside of the dust collector 1. Released.

  The dust separated by the filter 10 is stored in the tank unit 5. The liquid sucked into the tank unit 5 is stored in the tank unit 5. When the water level of the liquid in the tank unit 5 reaches a predetermined height, the motor 3 is stopped by a signal from the water level sensor 16. As a result, collection of dust from the suction port 6 is stopped, so that submergence of the head portion 2, ejection of liquid from the exhaust port 14, back flow of liquid from the suction port 6, and the like are prevented.

  When disposing of dust or liquid in the tank unit 5, the clamp 9 is released, the head unit 2 is lifted upward, removed from the tank unit 5, then the filter 10 is removed, and the dust or liquid in the tank unit 5 is removed. Discard etc. After disposal, the filter 10 and the head unit 2 are attached to the tank unit 5 and fixed with the clamp 9.

  According to the present embodiment, the following effects can be achieved.

(1) Since the motor 3 (and the dust collecting fan 4) is arranged inside the side surface 10a of the filter 10 and within the height range of the side surface 10a, unlike the prior art, the position of the center of gravity is low and the stability is good. It is possible to realize a dust collector that is difficult to operate and has good operability.

(2) Since the motor 3 is a disk motor and is thinner than that of the prior art, such a thin motor 3 is placed in the middle part of the height of the filter 10 so that the center of gravity is reduced. Is expensive. Moreover, the overall height of the dust collector 1 can be reduced, which is advantageous for space saving.

(3) Since a smaller disk motor than that of the prior art is used as the motor 3, it is possible to reduce the size as compared with the prior art if the tank capacity is the same. For this reason, the problem of taking a place at the time of storage and transportation and getting in the way can be solved preferably.

(4) By providing the speed increasing means 18, the rotational speed of the dust collecting fan 4 can be increased with respect to the rotational speed of the motor 3, and the suction force can be enhanced.

(5) Since the large-diameter concave portion 21b is provided in the substantially central portion of the upper surface of the upper head member 21, small items and the like can be conveniently stored in the concave portion 21b. That is, if the upper surface of the upper head member 21 is entirely flat, there is a problem that when small objects are placed, the upper head member 21 is easy to move and drop due to vibration or the like. Such a problem can be solved suitably.

FIG. 5 is a side view, partly in section, of a dust collector according to a reference example . This dust collector is compared on purpose form of embodiment shown in FIG. 1, totally the plane upper surface of the upper head member 21 by eliminating the recess 21b of the upper head member 21, the motor 3 and the dust collection fan with it The difference is mainly in that 4 is moved upward, and the other points are the same. A part (lower side) of the motor 3 is located inside the side surface 10 a of the filter 10 and within the height range of the side surface 10 a, and the remaining part (upper side) is located above the upper opening of the filter 10. According to this reference example, although not by etc. ho form status of implementation, the low center of gravity can be realized over the prior art. Also, small storability compared form of implementation on purpose although low, the dust collection capacity is large. Further, with respect to space saving and size reduction provides the shape on purpose similar effect implementation.

  The present invention has been described above by taking the embodiment as an example. However, it is understood by those skilled in the art that various modifications can be made to each component and each processing process of the embodiment within the scope of the claims. By the way. Hereinafter, modifications will be described.

  In place of or in addition to providing the plurality of casters 7 at the lower part of the tank unit 5, for example, the tank unit 5 may be provided with an unillustrated back band so that the dust collector 1 can be carried on the back. Further, a shoulder band (not shown) may be provided so that the dust collector 1 can be put on the shoulder. According to these, since the center of gravity of the dust collector 1 is low, the dust collector 1 can be stably carried on the back or on the shoulder.

  The motor 3 may not be a disk motor but may be the same as that of the prior art. In this case, at least a part of the motor 3 is positioned inside the side surface 10a of the filter 10 and within the height range of the side surface 10a. Thus, the center of gravity can be lowered as compared with the prior art.

  The number of magnets and their arrangement angle pitch in the disk motor, the number of coil pattern turns (the number of coil pattern rows), the number of coil disk stacks, and other parameters can be set appropriately according to the required performance and cost. . Further, the number of turns of the coil pattern may be different for each coil disk when there are a plurality of coil disks. When the coil pattern is one row, the terms “partial coil pattern group”, “inner contact pattern group”, “radial pattern group”, and “outer contact pattern group” in the description of the embodiment are “ Replace with the exception of “group”.

DESCRIPTION OF SYMBOLS 1 Dust collector 2 Head part 3 Motor 4 Dust collection fan 5 Tank part 7 Caster 8 Switch 9 Clamp 10 Filter 11 Case 14 Exhaust port 16 Water level sensor 21 Upper head member 21a Flat part 21b Recess 22 Lower partition member 22a Bottom part 22b Side part 22c Flange

Claims (9)

A tank portion having a suction port;
A dust collecting fan for generating a suction force at the suction port;
A motor for rotationally driving the dust collecting fan;
A filter having a cylindrical side surface disposed in the tank portion;
The motor is located within the height range of the inner and the side surface of the side surface of the filter, a dust collector. The tank portion has an opening at the top,
A head portion attached to the tank portion so as to cover the opening portion;
The top of the filter is an opening;
The head portion includes an upper head member, and a lower partition member that extends downward from the upper head member and extends below the opening of the filter and inside the side surface of the filter,
The dust collector according to claim 1, wherein the motor and the dust collecting fan are disposed in a space between the upper head member and the lower partition member.   The dust collector according to claim 2, wherein the upper head member has a concave portion that is recessed downward, and the motor and the dust collecting fan are disposed below the concave portion. A case for housing the motor and the dust collecting fan;
The lower partition member includes a bottom surface portion on which the case is placed, a cylindrical side surface portion that rises from the bottom surface portion outside the case, and a flange portion that extends outward from the upper end side of the side surface portion, The dust collector according to claim 2 or 3, wherein a flange portion is detachably fixed to the upper head member, and an opening for air circulation is formed in the bottom surface portion.   The dust collector according to claim 4, wherein an exhaust port penetrating between the flange portion and the upper head member is provided.   The speed increasing means is provided between the motor and the dust collecting fan, and the dust collecting fan is rotated at a rotational speed higher than the rotational speed of the motor. Dust collector.   The dust collector according to any one of claims 1 to 6, wherein the motor is a disk motor. The disk motor has a rotor, a stator, and an output shaft,
The rotor includes a coil disk that rotates integrally with the output shaft,
The stator includes magnetic flux generation means for generating a magnetic flux penetrating the coil disk,
The dust collector according to claim 7, wherein the coil disk is rotated by an electromagnetic force between a current flowing in a coil pattern provided on the coil disk and a magnetic field generated by the magnetic flux generation unit.   The dust collector as described in any one of Claim 1 to 8 provided with the water level sensor which stops the said motor when the liquid level becomes the predetermined height inside the said tank part.

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