JP7172144B2 - dust collector - Google Patents

Description

The present invention relates to a dust collector that operates on power from a battery pack.

Patent Literature 1 below discloses a cordless dust collector that operates on the power of a detachably mounted battery pack. By using the battery pack as the power source, the dust collector can be driven without being restricted by the power cord, and the movement operability during work is improved.

JP 2015-208577 A

In order to secure a long driving time of the dust collector, it is necessary to use a battery pack with a large capacity. A large-capacity battery pack has a large weight and volume, and therefore has a large effect on the center of gravity and size of the dust collector. If the battery pack raises the center of gravity of the dust collector or increases the size of the dust collector, the operability of moving the dust collector deteriorates.

SUMMARY OF THE INVENTION The present invention has been made in recognition of such circumstances, and an object thereof is to provide a dust collector capable of suppressing deterioration of movement operability in a configuration that operates with electric power supplied from a battery pack.

One aspect of the present invention is a dust collector. This dust collector
a motor having a vertically extending drive shaft;
a battery pack that powers the motor;
a head portion that houses the motor;
a tank portion provided below the head portion and having a suction port, a tank opening closed by the head portion, and a dust storage chamber for storing dust sucked from the suction port;
a filter portion provided in the dust accommodating chamber of the tank portion and having a filter inner space in which a filter opening is formed on an upper side;
a motor casing that is provided in the head portion and houses the motor;
a battery housing chamber provided around the motor casing in the head portion and housing the battery pack;
At least one of the battery housing chamber and a wall portion that separates the inside and outside of the battery housing chamber,
extending below the filter opening in the vertical direction and positioned inside the filter opening in the radial direction of the drive shaft;
The outer edge of the battery pack is accommodated inside the filter opening in the radial direction of the drive shaft.

the battery pack includes a first battery pack and a second battery pack;
The head portion has a first terminal for connection with the first battery pack and a second terminal for connection with the second battery pack,
The first and second terminals are arranged in a first direction perpendicular to the drive shaft, separated on both sides of the motor casing in the first direction, and arranged in second terminals perpendicular to the drive shaft and the first direction. It may be arranged to at least partially overlap the motor casing in a direction.

Any combination of the above constituent elements, and conversion of expressions of the present invention between methods and systems are also effective as embodiments of the present invention.

ADVANTAGE OF THE INVENTION According to this invention, the dust collector which can suppress the deterioration of movement operability in the structure which operate|moves by the power supply from a battery pack can be provided.

Right side sectional drawing of the dust collector 1 which concerns on embodiment of this invention. FIG. 2 is an enlarged view of the periphery of the battery housing chamber 50 of FIG. 1; The top view of the dust collector 1. FIG.

Preferred embodiments of the present invention will be described in detail below with reference to the drawings. The same or equivalent constituent elements, members, etc. shown in each drawing are denoted by the same reference numerals, and duplication of description will be omitted as appropriate. Moreover, the embodiments are illustrative rather than limiting the invention, and not all features and combinations thereof described in the embodiments are necessarily essential to the invention.

1 and 3 define front and rear, up and down, and left and right directions of the dust collector 1 that are orthogonal to each other. The dust collector 1 is an electric dust collector, and includes a tank portion 10 and a head portion 20 as a main body. The tank part 10 and the head part 20 are separable from each other.

The tank portion 10 has a cylindrical shape with an open top and a bottom, and has a substantially quadrangular horizontal cross-section as shown in FIG. 3 (a rounded square or rectangle in the illustrated example). The tank part 10 has a suction port 11 on the front side surface, and a hose (not shown) can be detachably connected to the suction port 11 . A cylindrical filter device 15 is provided in the tank portion 10 for separating dust (filtering the sucked dust) when the air sucked from the suction port 11 passes through.

A filter device 15 as a filter section includes an annular elastic body 16 such as rubber, and a filter 17 made of cloth or the like having fine meshes on the outer peripheral surface. The upper part of the filter 17 is sewn around the lower part of the elastic body 16 to be integrated. The elastic body 16 is sandwiched between the tank portion 10 and the head portion 20 to airtightly close the space between the tank portion 10 and the head portion 20 . The filter device 15 has a substantially truncated cone side shape with an axis substantially parallel to the vertical direction, and surrounds the dust collection fan 25 .

Air can enter the filter inner space 14 inside the filter device 15 by passing through the outer peripheral surface of the filter 17, but dust contained in the air cannot pass through the mesh of the filter 17 and is filtered by the outer peripheral surface of the filter 17. and adheres to the outer peripheral surface of the filter 17 or falls downward. A space in the tank portion 10 is a dust storage chamber 13 , and dust separated by the filter device 15 is stored in a space outside the filter device 15 in the dust storage chamber 13 .

The head section 20 is detachably fixed to the upper portion of the tank section 10 by, for example, a clamping mechanism (not shown). The head portion 20 closes the upper opening of the tank portion 10, that is, the tank opening. A handle 27 for carrying the dust collector 1 is provided on the upper surface of the head portion 20 . The head section 20 has a motor 23 , a motor cooling fan 24 , and a dust collection fan 25 inside a head housing 21 .

The motor 23 is arranged in the head portion 20 so that its drive shaft extends vertically. Here, the motor 23 is a brushless motor, and a switching element substrate 26 on which switching elements for supplying drive current to the motor 23 are mounted is provided above the motor 23 substantially vertically. The motor cooling fan 24 and the dust collecting fan 25 are attached to the drive shaft of the motor 23 and driven to rotate by the motor 23 . The motor cooling fan 24 is an axial fan positioned directly below the motor 23 and generates a downward airflow. The dust collection fan 25 is a centrifugal fan provided below the motor cooling fan 24 .

As shown in FIG. 3 , an operation panel 30 is provided on the front surface of the head portion 20 for the user to switch the operation of the dust collector 1 . The operation panel 30 has a main power switch 31 , a strength changeover switch 32 , a single-acting/interlocking changeover switch 33 , a remaining battery level display switch 34 , and a remaining battery level display section 35 . Note that single-acting is a mode in which the dust collector 1 operates alone, and interlocking is a mode in which an electric power tool (not shown) such as a circular saw is connected to the dust collector 1 with a power cable so that power can be supplied. , is a mode (function) in which the dust collector 1 is driven when power supply to another electric tool is detected, that is, when another electric tool is driven. As shown in FIG. 3, the dust collector 1 is a cordless type powered by two detachably mounted battery packs 40. When the battery residual amount display switch 34 is pressed, the battery residual amount display section 35 displays each battery pack. The remaining amount of 40 is displayed in multiple stages by means of an LED or the like.

As shown in FIGS. 1 and 3, a motor casing 29 that houses the motor 23 is provided inside the head portion 20 . As shown in FIG. 3 , terminal holding plates 56 and a predetermined number of terminals 57 are provided on both left and right sides of the motor casing 29 . When viewed from the motor casing 29, one terminal holding plate 56 and a predetermined number of terminals 57 are first terminal holding plates and first terminals, and the other terminal holding plate 56 and a predetermined number of terminals 57 are second terminal holding plates. and a second terminal. The left and right terminal holding plates 56 are parallel to each other. The terminals 57 are terminals for electrical connection with terminals of the battery pack 40 and held by the terminal holding plate 56 . The battery pack 40 is slidably mounted from above by engaging the rail portion 41 of itself and the rail receiving portion 55 provided on the head portion 20, whereby the terminals 57 on the side of the dust collector 1 and the terminals of the battery pack 40 are connected. are in contact with each other and electrically connected to each other. The battery pack 40 can be removed by pulling it upward while operating the latch operating portion 42 .

The battery pack 40 is housed and held in a battery housing chamber 50 provided in the head portion 20 . The two battery packs 40 are arranged in the left-right direction and mounted so that their front-rear and vertical positions are equal and parallel to each other. The battery housing chamber 50 is a space separated from the outside by a wall portion 51 and a lid body 52 . The lid 52 is swingably supported by the head housing 21 and can open and close the battery storage chamber 50 . The lid body 52 can be locked in a closed state by a hook 53 as a locking member.

The battery housing chamber 50 extends below the upper opening of the filter device 15 (hereinafter also referred to as “filter opening”) in the vertical direction, and is positioned inside the filter opening in the radial direction of the drive shaft of the motor 23 . . A two-dot chain line indicating the filter device 15 in FIG. 3 indicates the inner edge of the upper surface of the elastic body 16, that is, the inner edge of the filter opening. In the present embodiment, both the outer surface and the inner surface of the wall portion 51 that separates the inside and outside of the battery housing chamber 50 extend below the filter opening in the vertical direction. As shown in FIG. 3, when viewed from the motor casing 29, one of the left and right terminal holding plates 56 and a predetermined number of terminals 57 and the other terminal holding plate 56 and a predetermined number of terminals 57 are arranged in the horizontal direction as the first direction. , and arranged so as to at least partially overlap the motor casing 29 in the front-rear direction as the second direction. Also, the front-rear position of the battery pack 40 and the front-rear position of the motor casing 29 partially overlap each other.

When the motor 23 is driven in the dust collector 1, the motor cooling fan 24 and the dust collection fan 25 are rotationally driven. Due to the rotation of the dust collection fan 25 , the pressure inside the tank portion 10 becomes negative, and a suction force is generated in the suction port 11 . Then, dust is sucked into the tank part 10 from the suction port 11 together with the air. Dust and air are then separated by the filter 17 , and the dust is accumulated in the space outside the filter 17 in the dust storage chamber 13 . On the other hand, the air passes through the outer peripheral surface of the filter 17, enters the filter internal space 14, passes through an opening (not shown) in the lower surface of the fan cover 28 that constitutes a part of the head housing 21, and enters the dust collection fan 25 from below. It is sucked in, passes through a space separated from the motor 23, and is exhausted to the outside. Dust is collected on the outer peripheral surface of the filter 17 and accumulated in the dust storage chamber 13 .

According to this embodiment, the following effects can be obtained.

(1) Since the battery pack 40 and the battery storage chamber 50 extend below the filter opening, the battery pack 40 prevents the center of gravity of the dust collector 1 from being raised and the size of the dust collector 1 from being increased in the height direction. It is possible to suppress deterioration of movement operability of the dust collector 1 .

(2) Since the battery pack 40 and the battery storage chamber 50 are positioned inside the filter opening in the radial direction of the drive shaft of the motor 23, the size of the dust collector 1 can be suppressed from increasing in the radial direction due to the battery pack 40, and the dust collector can be improved. 1 can be suppressed.

(3) A set of the terminal holding plate 56 and a predetermined number of terminals 57 are arranged in the left-right direction, separated on both sides of the motor casing 29 in the left-right direction, and overlapped at least partially with the motor casing 29 in the front-rear direction. Therefore, compared with the case where the set of the terminal holding plate 56 and the predetermined number of terminals 57 does not overlap the motor casing 29 in the front-rear direction, it is possible to suppress an increase in the size of the dust collector 1 in the front-rear direction, and the left and right battery packs. The distance in the left-right direction of 40 is widened, making it easy to insert a finger into the latch operating portion 42.例文帳に追加

Although the present invention has been described above with reference to the embodiments, it will be understood by those skilled in the art that various modifications can be made to each component and each processing process of the embodiments within the scope of the claims. By the way.

1 dust collector,
10 Tank Part 11 Suction Port (Hose Mounting Port) 13 Dust Storage Chamber 14 Space in Filter 15 Filter Device 16 Elastic Body 17 Filter
20 head part (body), 21 head housing, 23 motor (brushless motor), 24 motor cooling fan, 25 dust collection fan, 26 switching element board, 27 handle, 28 fan cover, 29 motor casing,
30 operation panel, 31 main power switch, 32 intensity changeover switch (tactile switch), 33 single-acting/interlocking changeover switch, 34 battery remaining amount display switch, 35 battery remaining amount display section,
40 battery pack, 41 rail portion, 42 latch operating portion,
50 battery housing chamber 51 wall portion 52 lid body 53 hook 55 rail receiving portion 56 terminal holding plate 57 terminal

Claims (2)

a motor having a vertically extending drive shaft;
a battery pack that powers the motor;
a head portion that houses the motor;
a tank portion provided below the head portion and having a suction port, a tank opening closed by the head portion, and a dust storage chamber for storing dust sucked from the suction port;
a filter portion provided in the dust accommodating chamber of the tank portion and having a filter inner space in which a filter opening is formed on an upper side;
a motor casing that is provided in the head portion and houses the motor;
a battery housing chamber provided around the motor casing in the head portion and housing the battery pack;
At least one of the battery housing chamber and a wall portion that separates the inside and outside of the battery housing chamber,
extending below the filter opening in the vertical direction and positioned inside the filter opening in the radial direction of the drive shaft;
A dust collector, wherein an outer edge of the battery pack is accommodated inside the filter opening in a radial direction of the drive shaft. the battery pack includes a first battery pack and a second battery pack;
The head portion has a first terminal for connection with the first battery pack and a second terminal for connection with the second battery pack,
The first and second terminals are arranged in a first direction perpendicular to the drive shaft, separated on both sides of the motor casing in the first direction, and arranged in second terminals perpendicular to the drive shaft and the first direction. positioned to at least partially overlap the motor casing in a direction;
A dust collector according to claim 1.

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