WO2023234185A1

WO2023234185A1 - Work machine

Info

Publication number: WO2023234185A1
Application number: PCT/JP2023/019601
Authority: WO
Inventors: 大輔百鳥
Original assignee: 工機ホールディングス株式会社
Priority date: 2022-05-30
Filing date: 2023-05-26
Publication date: 2023-12-07

Abstract

The purpose of the present invention is to improve the workability of a work machine. A blower 1 comprises: a motor 10; a fan part that is operated by the driving force of the motor 10; a housing part 2 that accommodates the motor 10 and the fan part; and an attachment part mounted on the housing part 2. The housing part 2 includes: a first housing member 2a and a second housing member 2b that are combined in the right-left direction; and a filter holder 16b that is disposed so as to span from the first housing member 2a to the second housing member 2b, wherein the filter holder 16b has a first engagement part that engages with the attachment part.

Description

work equipment

The present invention relates to working machines such as blowers.

An example of a working machine is a centrifugal fan that rotates with the driving force of a motor, a case (housing part) that houses the motor and the centrifugal fan, and a nozzle that sends out air using the air flow generated by the rotation of the centrifugal fan. An electric blower having a part and a part is known.

As an electric blower as described above, for example, Patent Document 1 discloses a structure that is formed by assembling a pair of half-shaped cases and includes a case that can house a centrifugal fan inside. ing. A suction port is provided on one side of the pair of half-shaped cases, and a dust collection hose or the like can be attached to the suction port as an attachment.

Japanese Patent Application Publication No. 2007-332889

In Patent Document 1 mentioned above, the suction port is provided in one of a pair of half-shaped cases, but a different type of fan (for example, an axial fan that blows air in the direction of the rotation axis of the fan) is used. If the overall layout of the product is different, for example, the suction port may be arranged to span both halves of a pair of cases. If an attachment such as a nozzle is to be removably attached to an inlet that spans both halves of a pair of cases, it is necessary to provide an attachment holding portion in each of the divided cases.

In this case, the tolerances in the positions and distances between the plurality of attachment holding parts provided in each divided case tend to become large. For this reason, the attachment tends to fall off from the attachment holding part during work, or conversely, it becomes difficult to remove the attachment from the attachment holding part, which deteriorates the workability of the electric blower. Therefore, it has been desired to improve the workability of electric blowers.

An object of the present invention is to provide a working machine with improved workability.

The work machine of the present invention includes a motor, an operating section that operates by the driving force of the motor, a housing section that accommodates the motor and the operating section inside, and an attachment section that is attached to the housing section. The housing portion includes a first housing member and a second housing member that are combined in a first direction, and a third housing member that is arranged to straddle the first housing member and the second housing member. The third housing member has a first engaging portion that engages with the attachment portion.

According to the present invention, the workability of a working machine can be improved.

1 is a side view showing the structure of a working machine according to an embodiment of the present invention. FIG. 2 is a rear view showing the structure of the back side of the working machine shown in FIG. 1; FIG. 2 is a side sectional view showing the internal structure of the working machine shown in FIG. 1. FIG. FIG. 2 is a perspective view showing a structure in which a nozzle is attached to the back surface of the working machine shown in FIG. 1. FIG. 5 is a side view showing the structure of the working machine shown in FIG. 4. FIG. 5 is a plan view showing the structure of the working machine shown in FIG. 4. FIG. FIG. 5 is a plan sectional view showing the internal structure of the working machine shown in FIG. 4. FIG. FIG. 5 is a side view showing the structure of a filter section, an attachment section, and a nozzle that are assembled into the work machine shown in FIG. 4. FIG. 5 is an exploded perspective view showing the structure of the working machine shown in FIG. 4. FIG. 10 is a rear view showing the structure of the working machine shown in FIG. 9 when viewed from the back side. FIG. 11 is a cross-sectional view showing the structure taken along line AA shown in FIG. 10. FIG. FIG. 5 is a perspective view showing the structure of the filter section of the working machine shown in FIG. 4 when viewed from the rear. FIG. 13 is a perspective view showing the structure of the filter section shown in FIG. 12 viewed from the front. FIG. 13 is a rear view showing the structure of the filter section shown in FIG. 12 when viewed from the rear. 13 is a diagram showing the structure of the filter section in FIG. 12, in which (a) is a front view seen from the front, and (b) is a cross-sectional view taken along line AA in (a). FIG. 5 is a perspective view showing the structure of the attachment section of the work machine shown in FIG. 4 when viewed from the rear. FIG. 17 is a perspective view showing the structure of the attachment section shown in FIG. 16 viewed from the front. FIG. 17 is a rear view showing the structure of the attachment section in FIG. 16 viewed from the rear. FIG. 17 is a diagram showing the structure of the attachment part in FIG. 16, in which (a) is a front view seen from the front, and (b) is a cross-sectional view taken along line AA in (a). FIG. 5 is a perspective view of the structure in which the attachment section is attached to the filter section of the working machine shown in FIG. 4, viewed from the rear. 21 is a side view showing the structure of FIG. 20. FIG. 21A and 20B are diagrams showing the structure of FIG. 20, in which (a) is a rear view seen from the rear, and (b) is a cross-sectional view taken along line AA in (a). FIG. 7 is a rear view showing the structure of a modified example of the work machine according to the embodiment of the present invention. 24 is an exploded perspective view showing the structure of the working machine shown in FIG. 23. FIG. 25 is a rear view showing the structure of the working machine shown in FIG. 24 viewed from the back side. FIG.

Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.

In this embodiment, a blower 1 will be described as an example of a working machine. As shown in FIGS. 1 to 3, the blower 1 is a working machine that takes in air from the rear side and discharges it from a nozzle provided on the front side to blow air to the work area, etc., and is also called an air duster. ing. To explain the configuration of the blower 1, the fan section (operating section) 10a rotates by the driving force of the motor 10 and generates an airflow F1 in the axial direction C1 along the rotation axis of the motor 10, and the motor 10. and a housing part 2 that accommodates the fan part 10a therein and has an exhaust part 12 on the front (one) side in the axial direction C1, and a nozzle 6 that is formed in a cylindrical shape and is detachably attached to the exhaust part 12. It is equipped with The housing section 2 includes a motor case 3 that accommodates the motor 10 and the fan section 10a therein and has an exhaust section 12, and a handle section that extends from the motor case 3 in a direction (vertical direction) that intersects the axial direction C1. 4, and a battery mounting part 5 connected to the handle part 4 so as to be located on the opposite side of the motor case 3 with the handle part 4 in between. In other words, the motor case 3 and the battery mounting part 5 extend along the axial direction C1 so as to be substantially parallel to each other at both ends of the handle part 4. That is, one end of the handle portion 4 is connected to the motor case 3, and the other end of the handle portion 4 is connected to the battery mounting portion 5. The housing part 2 has two housing halves (a first housing member 2a and a second housing member 2b shown in FIG. 4, which will be described later) molded from synthetic resin such as nylon or polycarbonate. The housing part 2 is assembled by abutting the first housing member 2a and the second housing member 2b, which are bodies.

In the blower 1 of this embodiment, the direction along the rotational axis of the motor 10 is referred to as the axial direction C1 and is also referred to as the front-rear direction, and furthermore, the direction intersects with the front-rear direction and in which the handle portion 4 extends. (Extending direction E1) is called the up-down direction. Moreover, the direction orthogonal to the front-rear direction and the up-down direction is called the left-right direction.

As shown in FIG. 3, a motor 10 and a fan section 10a are housed within the motor case 3. The motor 10 includes a stator 10b that is a coil and a rotor 10c that is a magnet, and is, for example, a brushless motor. The fan section 10a is a centrifugal fan attached to the rotating shaft of the rotor 10c, and sends air taken in from the intake section 11 at the rear of the motor case 3 toward the nozzle 6 attached to the front side of the motor case 3. Specifically, within the motor case 3, the motor 10 including the fan portion 10a is provided within a cylindrical container. As the fan part 10a rotates, air is taken in through a metal filter 16a provided in the intake part 11, and the taken air is directed toward the nozzle 6 along the inner wall 10d of the cylindrical container. send out. At this time, the rotation of the fan portion 10a generates an airflow F1 flowing along the axial direction C1, and the air sent by the airflow F1 is discharged from the tip of the nozzle 6.

Further, a motor board 10e is attached to the motor 10, and this motor board 10e is mounted with an inverter circuit of the motor 10 and a sensor for detecting the rotational position of the rotor 10c.This motor board 10e is also housed in the motor case 3. ing.

Further, the handle portion 4 includes a trigger 9 and a trigger switch 13, which are switch portions provided on the motor case 3 side so as to protrude toward the front (one) side in the axial direction C1. Further, inside the handle portion 4, a control board 8 on which a microcomputer is mounted is provided. Further, a battery pack 7 that supplies power to the motor 10 is detachably attached to the battery attachment section 5 . Therefore, when the trigger 9 is operated, the fan section 10a operated by the driving force of the motor 10 rotates, and the rotation of the fan section 10a generates an airflow F1 in the axial direction C1. As a result, air taken in from the rear intake section 11 is sent forward by the air flow F1 and is discharged from the tip of the nozzle 6.

As shown in FIG. 3, a protruding part 3a protruding forward from the motor case 3 is provided directly below the exhaust part 12 of the motor case 3, and the protruding part 3a has a bright area where air is blown. An illuminating LED 17 is provided. By providing the LED 17 on the protruding portion 3a that protrudes forward from the motor case 3 in this manner, the work area can be brightened more.

Further, the nozzle 6 is formed in a cylindrical shape, and the diameter of the other end is larger than that of the one end. Specifically, the proximal end portion 6b attached to the exhaust part 12 of the motor case 3 is provided with an intake port 6d as the nozzle 6, and the distal end portion 6a located on the opposite side to the proximal end portion 6b is provided as the nozzle 6. It is equipped with an exhaust port 6e. In the nozzle 6, the proximal end portion 6b is thicker than the distal end portion 6a, and has a tapered shape that becomes thinner toward the distal end.

Next, another usage pattern of the blower 1 of this embodiment will be described. As shown in FIGS. 4 to 6, in the blower 1, a suction nozzle 18 is attached to the back side (rear side) of the motor case 3 through an attachment part 15, so that it can be used to It can be used for air suction when removing air from the air. In the blower 1 shown in FIG. 4, a housing part 2 including a motor case 3 is arranged such that a first housing member 2a and a second housing member 2b are combined in the left-right direction (first direction), and a first housing member 2a and a second housing member 2b are combined in the left-right direction (first direction). and a third housing member disposed between the housing member 2b (in other words, disposed astride the first housing member 2a and the second housing member 2b). Further, the blower 1 includes an attachment section 15 that is attached to the housing section 2. Specifically, the third housing member is a filter holder 16b that holds a metal filter 16a, and the filter holder 16b is assembled by being sandwiched between the first housing member 2a and the second housing member 2b. . The attachment portion 15 is detachably attached to the filter holder 16b. Furthermore, as shown in FIGS. 7 and 8, a nozzle 18 is attached to the pipe section 15d of the attachment section 15.

Specifically, as shown in FIGS. 9 to 11, the motor 10 is arranged in a space surrounded by the first housing member 2a, the second housing member 2b, and the filter holder (third housing member) 16b. . Moreover, the trigger 9, the trigger switch 13, the control board 8, the terminal unit 14, etc. are arranged in the space surrounded by the first housing member 2a and the second housing member 2b.

When assembling the first housing member 2a and the second housing member 2b with screws, the groove 2d provided on the inner circumferential wall on the back side of the first housing member 2a and the inner peripheral wall on the back side of the second housing member 2b are connected to each other. The filter holder 16b is assembled with the convex portion 16d of the filter holder 16b sandwiched between the groove portion 2e provided on the inner circumferential wall. Thereby, the filter holder 16b is also fixed to the first housing member 2a and the second housing member 2b. An opening 2c is formed at the end of the back side of the motor case 3 made up of a portion of each of the first housing member 2a and the second housing member 2b, and a mesh-like metal filter 16a and a A filter holder 16b made of resin is provided to support the metal filter 16a. Therefore, the filter holder 16b is provided with a vent 16g through which the air flow generated by the fan section 10a passes, and serves as a passage for air sucked through the nozzle 18. Further, a mesh-like metal filter 16a is provided to block the ventilation port 16g, but the metal filter 16a is provided with a large number of fine holes through which air can pass.

Note that, as shown in FIGS. 7 and 8, the attachment section 15 is bowl-shaped and is attached to the filter holder 16b from above the filter element (filter section) 16 including the filter holder 16b.

Next, the engagement structure between the attachment portion 15 and the filter holder 16b will be described. In this embodiment, a snap fit is employed as the engagement structure between the attachment portion 15 and the filter holder 16b.

First, the structure of the filter element (filter section) 16 including the filter holder 16b will be explained. As shown in FIGS. 12 to 15, the filter element 16 includes a mesh-shaped metal filter (filter) 16a through which air can pass, and a resin filter holder (third housing member) that supports the metal filter 16a. ) 16b. The filter holder 16b is a resin member in which the metal filter 16a is embedded by insert molding. The filter holder 16b is provided with a first engaging portion that engages with the attachment portion 15, and the first engaging portion is a component of the snap-fit filter holder 16b. The snap-fit component (first engagement part) on the side of the filter holder 16b is a hole part 16c that is provided one at a time and spaced apart from each other in the left-right direction. On the outer periphery of the filter holder 16b, convex portions 16d that are sandwiched and fixed between the first housing member 2a and the second housing member 2b are provided at four locations on the top, bottom, left and right.

On the other hand, as shown in FIGS. 16 to 19, the attachment part 15 includes a bowl-shaped attachment body 15a, a cylindrical pipe part 15d provided on the attachment body 15a, and a notch on both sides of the attachment body 15a. A claw portion 15b provided on the portion 15c. The inside of the pipe section 15d becomes a passage through which the airflow generated by the fan section 10a flows from the nozzle 18 to the vent 16g. The attachment portion 15 is also provided with a first engagement portion as a snap fit that engages with the filter holder 16b. In the present embodiment, the snap-fit components (first engagement portions) on the attachment portion 15 side are claw portions 15b provided one at a time and spaced apart in the left-right direction. These claw portions 15b each protrude in the left-right direction. Therefore, as shown in FIGS. 20 to 22, by fitting the two left and right claws 15b of the attachment part 15 into the two left and right holes 16c of the filter holder 16b, the filter holder 16b and the attachment part 15 are connected. engaged. Since the claw portions 15b protrude in the left-right direction, there is no need to increase the installation accuracy and size accuracy of the two holes 16c provided in the filter holder 16b in the left-right direction. In other words, by adopting a snap-fit engagement between the claw portion 15b and the hole portion 16c, the attachment portion 15 can be moved not in the rotational direction with respect to the housing portion 2, but in the front-rear direction intersecting the left-right direction. It can be attached to and detached from the holder 16b.

Here, the two holes (first engaging portions) 16c, which are components of the snap fit, are provided in the filter holder 16b, which is a single member. In other words, the filter holder 16b is a single member that is not divided in the left-right direction. Therefore, in the blower 1 of this embodiment, when attaching the attachment part 15 to the filter holder 16b, the snap-fit claw part 15b is fitted into the hole 16c of the filter holder 16b made of a single member. It is possible to easily manage the dimensional accuracy of the positions and distances of the two left and right holes 16c provided therein. As a result, the workability of the blower 1 can be improved. In other words, by providing the engagement structure of the attachment part 15 on the filter holder 16b made of a single member, the filter holder 16b is a member that cannot be divided, so the position and distance of the two hole parts 16c that are spaced apart from each other on the left and right. It is possible to easily manage the dimensional accuracy of.

Furthermore, the blower 1 of this embodiment is compatible with downsizing. However, it is preferable that the vent hole 16g be made large in order to ensure the amount of air. Therefore, the shape of the motor case 3 is a vertically elongated substantially rectangular (non-circular) shape in order to make the air passage large while reducing the size in the left-right direction. As a result, the filter holder 16b, which is sandwiched and assembled between the first housing member 2a and the second housing member 2b, also has an elongated substantially rectangular (non-circular) shape. Specifically, as shown in FIG. 15(a), the shape of the joint portion 16f of the filter holder 16b to the first housing member 2a and the second housing member 2b is such that the length L1 in the left-right direction is the same as the length L1 in the left-right direction. It is a substantially rectangular (non-circular) shape shorter than length L2 (L1<L2) in the vertical direction (third direction) where it intersects. In addition, the entire arrangement area of the plurality of ventilation holes 16g is also approximately rectangular (L3<L4) where the length L3 in the left-right direction is shorter than the length L4 in the vertical direction (third direction) intersecting the left-right direction (L3<L4). non-circular). Therefore, even though the horizontal dimension of the housing portion 2 is reduced, the opening area of the vent hole 16g can be secured and the air volume can be secured. In addition, since the shape of the filter holder 16b is approximately rectangular, it is difficult to provide an engagement structure in which the attachment portion 15 is rotated and attached. Therefore, by adopting a snap fit for the engagement structure of the attachment section 15, it is possible to attach the attachment section 15 by moving it in the front and back direction instead of rotating it. It is possible to easily manage the dimensional accuracy of the positions and distances between the plurality of first engaging portions provided.

Further, as shown in FIG. 12, the filter holder 16b of the filter element 16 has a non-flat end surface 16e in the front-rear direction (second direction) intersecting the left-right direction. Specifically, by forming the filter holder 16b into a vertically elongated substantially rectangular (non-circular) shape, the shape of the end surface 16e of the filter holder 16b can be made into a cubic curved surface, and the degree of freedom in the design of the blower 1 can be increased. can. Furthermore, since the filter can be curved, the area of the filter can be increased and the filter function can be improved.

In addition, as shown in FIGS. 14 and 15, in the filter holder 16b, the two left and right holes (first engagement portions) 16c, which are components of the snap fit, are located within the area where the metal filter 16a is arranged. It is set in. That is, even if the area of the filter is reduced, the filter holder 16b made of a single member is provided with two left and right holes 16c, and by making the filter holder 16b approximately rectangular (non-circular), the two left and right holes 16c are provided. It is possible to reduce the tolerance in the relative position of the filter holder 16b, and it is possible to ensure the mounting accuracy of the attachment part 15 to the filter holder 16b.

Further, since the filter is a metal filter 16a and the metal filter 16a is insert-molded into the filter holder 16b, the number of parts in assembling the blower 1 can be reduced. Furthermore, since the filter holder 16b is fixed to the housing part 2 without any gaps, the sealing performance of the filter can be improved and the filter function can be improved. Furthermore, since the metal filter 16a is insert-molded into the filter holder 16b, the filter surface can be easily cleaned. In addition, since the attachment part 15 engages with the filter holder 16b while the metal filter 16a is supported by the filter holder 16b, a configuration in which the metal filter 16a needs to be removed when the attachment part 15 is attached is used as a comparative example. In this case, not only can the number of man-hours for attaching and detaching the attachment part 15 be reduced, but also the strength of the filter holder 16b can be improved. In addition, since the attachment part 15 engages with the filter holder 16b so as to cover the ventilation port 16g, the airflow flowing inside the attachment part 15 passes through the metal filter 16a and the ventilation port 16g. The metal filter 16a can collect dust contained in the air that has passed through the attachment part 15.

Next, a modified example of the blower 1 shown in FIGS. 23 to 25 will be described. As shown in FIG. 24, the blower 1 of the modified example has a structure including a battery holding portion 19 made of resin as the third housing member. This battery holding portion 19 is provided with guide rails (first engaging portions) 19a on the left and right sides that serve as guides when attaching and detaching the battery pack 7. It is clamped and fixed. Considering that the battery pack 7 is also an example of an attachment, in this structure as well, the battery holding part 19 made of a single member is provided with a plurality of first engaging parts, and the battery holding part 19 is provided with a plurality of first engaging parts. The dimensional accuracy of the position and distance of the engaging portion can be easily managed. As a result, the workability of the modified blower 1 can also be improved.

The present invention is not limited to the embodiments described above, and can be modified in various ways without departing from the gist thereof. For example, in the embodiment described above, the attachment portion 15 and the nozzle 18 may be an integrated member. Further, the third housing member may be disposed so as to straddle the first housing member and the second housing member, at least partially covering the outer surfaces of both the first housing member and the second housing member.

DESCRIPTION OF SYMBOLS 1...Blower (work machine), 2...Housing part, 2a...First housing member, 2b...Second housing member, 2c...Opening, 2d, 2e...Groove part, 3...Motor case, 3a...Protrusion part, 4... Handle part, 5...Battery mounting part, 6...Nozzle, 6a...Distal end part, 6b...Proximal end part, 6d...Intake port, 6e...Exhaust port, 7...Battery pack, 8...Control board, 9...Trigger, DESCRIPTION OF SYMBOLS 10... Motor, 10a... Fan part (operating part), 10b... Stator, 10c... Rotor, 10d... Inner wall, 10e... Motor board, 11... Intake part, 12... Exhaust part, 13... Trigger switch, 14... Terminal unit , 15... Attachment part, 15a... Attachment main body, 15b... Claw part (first engaging part), 15c... Notch part, 15d... Pipe part, 16... Filter element (filter part), 16a... Metal filter (filter ), 16b... Filter holder (third housing member), 16c... Hole (first engaging part), 16d... Convex part, 16e... End surface, 16f... Joint part, 16g... Vent hole, 17... LED, 18... Nozzle, 19... Battery holding part (third housing member), 19a... Guide rail (first engaging part), L1, L2... Length

Claims

motor and
an operating section operated by the driving force of the motor;
a housing part that houses the motor and the operating part therein;
an attachment part attached to the housing part,
The housing part is
a first housing member and a second housing member assembled in a first direction;
a third housing member disposed astride the first housing member and the second housing member;
The third housing member includes a first engaging portion that engages with the attachment portion.
The operating unit is a fan unit that rotates by the driving force of the motor,
The working machine according to claim 1, wherein the third housing member has a vent through which the air flow generated by the fan section passes.
The first engaging portion includes a claw portion protruding in the first direction,
The working machine according to claim 1, wherein the third housing member and the attachment part are engaged with each other by the claw part.
The working machine according to claim 1, wherein a plurality of the first engaging portions are provided spaced apart in the first direction.
The third housing member is a single member sandwiched and fixed between the first housing member and the second housing member,
The working machine according to claim 4, wherein the plurality of first engaging portions are provided on the third housing member made of the single member.
A filter section including the third housing member and through which air can pass is provided,
The working machine according to claim 2, wherein the end face of the filter portion has a non-flat shape in a second direction intersecting the first direction.
The working machine according to claim 1, wherein the attachment section is attached to and detached from the third housing member by moving in a second direction intersecting the first direction.
The filter section includes a filter through which air can pass, and a filter holder that supports the filter and is provided as the third housing member,
The shape of the joint portion of the filter holder to the first housing member and the second housing member is non-circular, and the length in the first direction is shorter than the length in a third direction intersecting the first direction. The working machine according to claim 6.
A plurality of the first engaging portions are provided spaced apart in the first direction,
The working machine according to claim 8, wherein the plurality of first engaging portions are provided within a region where the filter is arranged.
The filter is a mesh-like metal filter,
The working machine according to claim 8, wherein the filter holder is a resin member in which the metal filter is embedded by insert molding.
The working machine according to claim 1, wherein a nozzle is removably attached to the attachment part.
The working machine according to claim 6, wherein the vent has a non-circular shape in which a length in the first direction is shorter than a length in a third direction intersecting the first direction.
motor and
a fan section that rotates by the driving force of the motor;
a housing portion that houses the motor and the fan portion therein;
an attachment part attached to the housing part,
The housing part is
a filter holder having a vent hole through which the air flow generated by the fan section can pass, and blocking the vent hole and supporting a filter through which the air flow can pass;
The filter holder is a working machine, and the filter holder includes a first engaging portion that engages with the attachment portion while supporting the filter.
The attachment part allows airflow generated by the fan part to pass therethrough;
The operation according to claim 13, wherein the filter holder engages with the attachment part so that the airflow flowing inside the attachment part passes through the filter and the vent while supporting the filter. Machine.