JP6837731B2 - Dust collector - Google Patents

Description

The present invention relates to a dust collector capable of using a DC power source such as a battery pack as a power source for a motor.

Conventionally, there is a dust collector as shown in Patent Document 1 below, a caster is provided at the bottom of the tank (dust case), and the power cord can be wound and rewound in the power cord storage portion with good workability. Those with improved operability have been proposed. However, since the power cord is driven by a commercial AC power supply, the power cord cannot be laid out, and the range of movement is restricted.

Japanese Unexamined Patent Publication No. 2008-284241

The present invention has been made in recognition of such a situation, and an object of the present invention is to provide a dust collector capable of improving mobile operability by driving a motor using a DC power supply.

The first aspect of the present invention is a dust collector. This dust collector includes a dust case having an opening at the top, a main body housing arranged so as to close the opening of the dust case, a motor built in the main body housing, and a dust collecting fan rotationally driven by the motor. , A power path capable of supplying AC power, a plurality of battery packs as DC power sources each having a plurality of secondary batteries built-in and detachably attached to the main body housing, and power from the DC power source. A booster circuit that boosts the voltage and supplies the motor to the motor, and a charging circuit that charges the DC power source with the power of the AC power source.
The motor has a drive shaft that extends in the vertical direction and is rotationally driven by power supply from the power supply path or the booster circuit, and a self-cooling fan that rotates integrally with the drive shaft to cool the motor itself drives the motor. Fixed to the upper end side of the shaft ,
The upper end of the self-cooling fan is located below the upper end of each of the plurality of battery packs and above the lower end, and the upper end of the booster circuit and the charging circuit is located above the upper end of the self-cooling fan. Is located below, and the booster circuit and the lower end of the charging circuit are located above the lower end of the motor, and the intake air of the self-cooling fan cools the booster circuit and the charging circuit. ,
The plurality of battery packs are arranged so that the positions of the drive shafts in the axial direction overlap each other.
The motor has a lower end lower end of the plurality of battery packs, located below the lower end of the booster dose Michi及beauty said charging circuit is disposed from the opening so as to enter inside the dust case downwardly,
The plurality of battery packs, the booster circuit, and the charging circuit are located above the opening of the dust case, and are arranged within the arrangement range of the dust case in the front-rear, left-right directions.
The main body housing is formed in a rectangular shape when viewed in the vertical direction.
The plurality of battery packs are arranged between the motor and one side of the main body housing in a vertical direction, and the booster circuit and the charging circuit are arranged on opposite sides of the motor and the main body housing in a vertical view. It is characterized in that it is arranged between.

When the AC power supply is not connected and the DC power supply is connected, the DC power supply can be used, and when both the AC power supply and the DC power supply can be used, the AC power supply can be preferentially used. It is preferable to have an automatic switch.

When the AC power supply is used, it is preferable to supply electric power to the motor without going through the booster circuit.

The booster circuit and the charging circuit may be arranged on the side of the motor so that the height in the vertical direction is longer than the thickness in the radial direction about the drive shaft.

It is preferable to provide the main body housing with a drive power supply display unit capable of visually recognizing which of the AC power supply and the DC power supply supplies power to the motor.

To be provided with a battery remaining amount display section for displaying the remaining amount of the previous SL plurality of battery packs is mounted in the main housing.

The plurality of battery packs are arranged on one side of the motor, and an operation unit having an operation switch capable of supplying electric power from the power source to the motor is arranged on the other side of the motor. It should be done.

The plurality of battery packs may be compatible with one or more other tools by themselves.
The booster circuit and the upper end of the charging circuit are arranged so as to be located between the upper end and the lower end of each of the plurality of battery packs, and the booster circuit and the charging circuit are arranged with the plurality of battery packs. may position in the circumferential direction around the said drive shaft is arranged such that different.
Each of the plurality of battery packs may have a bottom surface provided with a connection terminal, and each of the bottom surfaces may be arranged so as to be located on a single plane.

Any combination of the above components and a conversion of the expression of the present invention between methods, systems and the like are also effective as aspects of the present invention.

According to the present invention, it is possible to improve the movement operability by driving the motor that rotationally drives the dust collecting fan with a DC power supply.

A right side view showing a part of the first embodiment of the dust collector according to the present invention as a cross section. The rear view of the main part which also has a part in cross section. Also a plan view. In the circuit diagram of the first embodiment, (A) shows a state in which power from an outlet is supplied to an AC motor, and (B) shows a state in which power from a battery pack is supplied to an AC motor. The circuit diagram shown. The flowchart which shows the operation of 1st Embodiment. The plan view which shows the 2nd Embodiment of this invention. In the second embodiment, a circuit diagram showing a state in which two battery packs are connected in series and electric power from the battery packs is supplied to an AC motor. In the second embodiment, a circuit diagram showing a state in which two battery packs are connected in parallel and electric power from the battery packs is supplied to an AC motor. A right side view showing a third embodiment as a cross section. The plan view which shows the 3rd Embodiment. The rear view of the main part which made a part of the cross section which shows the 4th Embodiment. The right side view which shows the 5th Embodiment. In the circuit diagram of the sixth embodiment, (A) shows a state in which power from an outlet is supplied to a DC motor, and (B) shows a state in which power from a battery pack is supplied to a DC motor. The circuit diagram shown. The flowchart which shows the operation of 6th Embodiment. FIG. 5 is a flowchart showing an operation when a brushless motor is used in the seventh embodiment. In the circuit diagram of the eighth embodiment, (A) is a state in which electric power from an outlet is supplied to an AC motor via an automatic power changeover switch, and (B) is a battery via an automatic power changeover switch. A circuit diagram showing the state in which the power from the pack is supplied to the AC motor. The flowchart which shows the operation of 8th Embodiment. In the circuit diagram of the ninth embodiment, (A) is a state in which electric power from an outlet is supplied to a DC motor via an automatic power changeover switch, and (B) is a battery via an automatic power changeover switch. A circuit diagram showing a state in which power from the pack is supplied to a DC motor. FIG. 5 is a flowchart showing an operation of charging in parallel with driving the motor according to the tenth embodiment. An example of a battery pack used in each embodiment of the present invention, (A) is a perspective view seen from the insertion side (front side), and (B) is a perspective view seen from the rear side. It is an application example of this invention, and is explanatory drawing which shows the structure which interlocked the dust collector and the cordless dust collector circular saw.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The same or equivalent components, members, processes, etc. shown in the drawings are designated by the same reference numerals, and redundant description will be omitted as appropriate. Moreover, the embodiment is not limited to the invention but is an example, and all the features and combinations thereof described in the embodiment are not necessarily essential to the invention.

The first embodiment of the dust collector according to the present invention will be described with reference to FIGS. 1 to 5. In these figures, the dust collector 1 has a main body housing (head cover) 2a, an electric motor 3 arranged and fixed inside the main body housing (head cover) 2, and a centrifugal dust collector fan 4 rotationally driven by the motor 3 to suck dust. It includes a main body (head) 2 and a bottomed dust case 10 having a dust suction port (hose attachment port) 11 on a side surface portion and opening upward, and the main body 2 is arranged in the opening. The main body 2 is arranged to close the upper opening of the bottomed dust case 10 with the main body housing 2a, and is detachable from the dust case 10, and the main body housing 2a is an exhaust gas that discharges the air sucked by the dust collecting fan 4. It has mouths 5a, 5b, 5c (see FIGS. 1 and 2). The dust case 10 has an internal space for storing dust.

The motor 3 is arranged so that its output shaft is vertically downward with respect to the main body housing 2a, the centrifugal dust collecting fan 4 is directly connected to the motor output shaft, and the intake port 6 of the dust collecting fan 4 is directly connected to the main body housing. It is provided at the center of the lower surface of 2a. The air flow accompanying the rotation of the dust collecting fan 4 is indicated by a solid arrow P in FIG. 1, and a part of the exhaust air passes through the inverter 30 and the charging circuit 31 described later in FIG. 4 to cool them. Most of the exhaust air from the dust collecting fan 4 is exhausted from the exhaust ports 5a, 5b, and 5c. An exhaust filter 9 is arranged inside the exhaust ports 5b and 5c forming portions of the main body housing 2a.

A self-cooling fan 7 is directly connected to the output shaft on the opposite side of the motor 3 on the side where the dust collecting fan is mounted, and the self-cooling fan 7 is provided with an intake port 8 (with an exhaust port 5a in FIG. 1) provided at another position of the main body housing 2a. Air is sucked (intaken) from (formed at different cross-sectional positions) and exhausted from the exhaust ports 5b and 5c via the motor 3 itself. The air flow accompanying the rotation of the self-cooling fan 7 is indicated by a dotted arrow Q in FIG. In the case of FIG. 1, the intake air from the self-cooling fan 7 passes through the inverter 30 and the charging circuit 31 to cool them.

A dust suction port 11 is formed in the dust case 10, and a filter device 12 is arranged inside the dust case 10 so as to partition the dust case 10 from the dust collecting fan 4 on the main body 2 side. A dust collecting hose 35 is detachably connected to the suction port 11. The filter device 12 holds the tubular filter 13 sandwiched between the top cover 14 and the bottom cover 15, and the outer edge portion of the top cover 14 is the seal packing 16 provided on the outer peripheral portion of the lower surface of the main body housing 2a. It is sandwiched between the outer peripheral portions of the upper edge of the dust case 10, and the main body housing 2a and the dust case 10 are fastened by a clamp or the like (not shown) to be crimped and sealed.

Further, in order to carry the dust collector 1, a handle 18 rotatably supported on the upper portion of the main body housing 2a is provided.

In the present embodiment, as shown in FIGS. 4A and 4B, the motor 3 is composed of an AC motor 3A, and a switch arranged on an operation panel 17 provided in the main body 2 of FIG. The motor 3A can be connected to the power cord 19 for connecting to the commercial AC power supply (outlet) via the 21 and the manual power supply changeover switch (SW) 20. The power cord 19 is pulled out from the main body 2. The AC motor 3A can also be connected to the battery pack 40 as a DC power source via the switch 21 arranged on the operation panel portion 17, the manual power supply changeover switch 20, and the inverter 30 arranged at an appropriate position in the main body 2. .. In this case, the inverter 30 has a function as a booster circuit that converts the DC voltage of the battery pack 40 into an AC voltage and boosts the voltage to the operating voltage of the AC motor 3A. Further, the battery pack 40 is connected to the power cord 19 via a charging circuit 31 arranged at an appropriate position in the main body 2, and the battery pack 40 is operated even while the AC motor 3A is being driven by the AC power supplied through the power cord 19. It can be charged with DC power of the required voltage value. The charging circuit 31 is provided with a protection circuit for preventing overcharging of the battery pack 40.

Although not shown, the main body housing 2a has a drive power supply indicator lamp that can visually indicate which of the commercial AC power supply and the DC power supply (battery pack 40) is supplying power to the AC motor 3A. It is provided. Further, a battery remaining amount lamp for displaying the remaining amount of the attached battery pack 40 is also provided in the main body housing 2a.

As shown in FIGS. 1 to 3, the battery pack 40 can be detachably attached to, for example, a battery pack mounting portion 2b which is a recess in the upper part of the main body housing 2a, and a connection terminal is attached to the battery pack mounting portion 2b. The unit 25 is arranged. In the case of FIG. 1, the battery pack 40 is arranged on the battery pack mounting portion 2b so that the bottom surface faces downward, and the connection terminal portion 25 on the main body 2 side is exposed on the bottom surface of the battery pack mounting portion 2b. It is fixed to.

The battery pack 40 has, for example, the appearance shown in FIGS. 20A and 20B (however, the bottom surface faces upward), and has one or a plurality of secondary batteries (rechargeable batteries) built in the battery case 41. is there. A plurality of slit grooves 42 are formed on the bottom surface of the battery case 41, and connection terminals 43 that can be electrically connected to the connection terminal portion 25 on the main body 2 side are arranged therein. Further, a first opening (air intake / exhaust port) 44 of a cooling air passage for cooling the internal battery is provided on the front surface of the battery case 41, and a second opening (air intake / exhaust port) 44 is provided on the bottom surface. An outlet) 45 is provided, and the two are connected by a cooling air passage (intake / exhaust passage) that passes through the inside of the battery case 41. By operating the battery pack mounting buttons 46 on the left and right sides of the battery case 41, the battery pack 40 can be detachably mounted on the battery pack mounting portion 2b of the main body housing 2a.

As shown in FIG. 2, the battery pack mounting portion 2b on which the battery pack 40 is arranged has exhaust ports 5b and 5c having a large number of slit holes opened in different directions. That is, the exhaust port 5b is open on the surface of the battery pack mounting portion 2b facing the front of the battery pack 40, and the exhaust port 5c is open on the surface of the battery pack 40 facing the left and right sides. As shown by arrows P + Q in FIG. 1, the exhaust air from the exhaust port 5b enters the battery pack 40 through the first opening 44 on the front surface of the battery pack 40, and cools the inside of the battery pack through the internal cooling air passage. Then, the air is exhausted from the second opening 45. Further, the exhaust air from the exhaust port 5c hits both side surfaces of the battery pack 40 to cool the battery case 41.

FIG. 5 is a manual operation flow according to the first embodiment, and shows a case where the use of an AC power source is prioritized. When using the dust collector 1, the user of the dust collector 1 first determines whether the power cord 19 of the dust collector 1 can be plugged into an AC power outlet (whether AC100V is present) (S1), and if it can be plugged in. If (S1: YES), the user plugs the power cord 19 into the outlet and switches the power changeover switch 20 to the side where the dust collector can receive the AC power supply as shown in FIG. 4 (A) (S2). Then, when the user operates the switch 21 to the energized side (S3), the AC motor (AC motor) 3A is driven and the dust collecting fan 4 is rotated.

If the power cord 19 cannot be plugged into the outlet (S1: NO), then it is determined whether the battery pack 40 is attached to the battery pack attachment portion 2b (whether there is a rechargeable battery) (S4). If the battery pack 40 is attached, the user switches the power supply changeover switch 20 to the side where the dust collector can receive the DC power supply as shown in FIG. 4 (B) (S5). As a result, the DC power can be converted into AC power by the inverter 30 (S6), and when the user energizes the switch 21 (S3), the AC motor 3A is driven and the dust collecting fan 4 is rotated.

As described above, the suction force generated by the rotation of the dust collecting fan 4 causes the inner portion of the dust case 10 of the dust collector 1 to have a negative pressure. As a result, air and dust are sucked into the dust case 10 from the suction port 11 via the dust collecting hose 35, separated into dust and air by the filter device 12, and the dust is separated into the dust and air by the filter device 12, and the dust is separated into the tubular filter 13 of the filter device 12. The air is collected on the outer peripheral surface, passes through the filter 13, passes through the inner portion of the filter device 12, and is sucked into the main body housing 2a. The dust collected on the outer peripheral surface of the filter device 12 naturally falls and is stored inside the dust case 10. The air sucked into the main body housing 2a is exhausted from the exhaust ports 5b and 5c provided in the battery pack mounting portion 2b toward the battery pack 40 and the connection terminal portion 25 via the exhaust filter 9. When the battery pack 40 is attached to the battery pack mounting portion 2b, the exhausted air passes through the path of the first opening 44, the cooling air passage, and the second opening 45 of the battery pack 40, and passes through the battery pack 40. Cool effectively. When the battery pack 40 is not attached to the battery pack mounting portion 2b and is driven by an AC power source, the exhaust air is blown to the connection terminal portion 25 to blow off dust and the like of the connection terminal portion 25.

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

(1) Electric power can be selectively supplied from the battery pack 40 as a commercial AC power source or a DC power source, and electric power suitable for driving the motor 3 can be supplied to the motor, and the movement operability can be improved.

(2) By making the commercial AC power supply available, the exhaust air of the dust collecting fan 4 and the suction and exhaust air of the self-cooling fan 7 are generated regardless of the presence or absence of the battery pack 40, and these are used to generate the battery pack 40 and the inverter. 30. It is possible to cool the charging circuit 31 and suppress heat generation. Further, it is possible to blow the exhaust air to the battery pack mounting portion 2b.

(3) By providing the exhaust ports 5b and 5c in different directions of the battery pack mounting portion 2b, which is a part where the battery pack 40 is detachably mounted, the exhaust air discharged from the exhaust ports 5b and 5c is sent to the battery pack 40. It is possible to discharge from a plurality of directions toward the air, and a good cooling effect can be obtained. Further, by passing the exhaust air through the cooling air passage inside the battery pack 40, the inside of the battery pack 40 can be efficiently cooled.

(4) When the battery pack 40 is not mounted on the battery pack mounting portion 2b, exhaust air in multiple directions from the exhaust ports 5b and 5c is blown toward the connection terminal portion 25 and adheres to the connection terminal portion 25. It is possible to eliminate dust and the like. As a result, it is possible to prevent poor contact with the battery pack 40, short-circuit failure, etc. caused by dust or the like adhering to the connection terminal portion 25. Further, it is not necessary to provide a cover to prevent dust and the like from adhering to the connection terminal portion 25, and the number of parts does not increase.

(5) The battery pack 40 is connected to the power cord 19 via the charging circuit 31 in the main body 2, and the battery pack 40 has a required voltage value even while the AC motor 3A is being driven by the AC power supplied through the power cord 19. It can be charged with DC power.

(6) A compatible battery pack 40 that can be used with one or more other types of tools can be used.

6 to 8 show a second embodiment of the present invention. In this second embodiment, the number of battery packs 40 is different from that in the first embodiment. That is, the main body housing 2a of the main body 2 of the dust collector 1 is provided with two battery pack mounting portions 2b, and the battery pack 40 can be detachably mounted on each battery pack mounting portion 2b. The two battery pack mounting portions 2b are arranged so as to sandwich the motor 3 in the main body 2, and the dimensions of the dust collector 1 in the left-right direction are made compact despite the arrangement of the two battery packs.

FIG. 7 is a circuit diagram showing a state in which two battery packs 40 are connected in series and power from the battery pack 40 is supplied to the AC motor 3A via the inverter 30 in the second embodiment. Is a circuit diagram showing a state in which two battery packs 40 are connected in parallel and power from the battery pack 40 is supplied to the AC motor 3A via the inverter 30 in the second embodiment.

Other configurations are the same as those of the first embodiment, and the battery pack 40 as an AC power source or a DC power source can be selectively used according to the manual operation flow of FIG.

According to this second embodiment, since a plurality of battery packs 40, which are DC power sources, can be connected, the motor 3A can be driven with a larger power than when driven by one battery pack 40. , Or the motor 3A can be driven for a long time.

A third embodiment of the present invention will be described with reference to FIGS. 9 and 10. This third embodiment differs from the first embodiment in the number of battery packs 40 and the mounting posture. That is, although the battery pack mounting portion 2b is provided in the main body housing 2a of the main body 2 of the dust collector 1, the mounting posture of the battery pack 40 is such that the longitudinal direction thereof faces up and down (the bottom surface of the battery pack 40 is up and down). Looking in the direction). The battery pack 40, which is removable from the battery pack mounting portion 2b, is arranged in parallel on the side of the motor 3 in the main body 2, and the two battery packs are placed vertically in the left-right direction of the main body 2 of the dust collector 1. The dimensions of the are compact. The circuit of FIG. 7 can be used when two battery packs 40 are connected in series, and the circuit of FIG. 8 can be used when two battery packs 40 are connected in parallel. In FIG. 9, the air flow associated with the rotation of the dust collecting fan 4 is indicated by a solid arrow P, and the air flow associated with the rotation of the self-cooling fan 7 is indicated by a dotted arrow Q.

Other configurations are the same as those of the first embodiment, and the battery pack 40 as an AC power source or a DC power source can be selectively used according to the manual operation flow of FIG.

A fourth embodiment of the present invention will be described with reference to FIG. The fourth embodiment differs from the first embodiment in the number of battery packs 40 and the mounting posture. That is, although the main body housing 2a of the main body 2 of the dust collector 1 is provided with two battery pack mounting portions 2b, the mounting posture of the battery pack 40 is in a sideways state and the longitudinal direction is oriented in the front-rear direction (battery pack). The bottom surface of 40 faces the left and right side surfaces of the main body housing 2a). The battery pack 40, which is detachable from each battery pack mounting portion 2b, is arranged so as to sandwich the motor in the main body 2, and the dimensions of the dust collector 1 in the left-right direction are made compact. Further, by mounting the bottom surface of the battery pack 40 so as to face the left and right side surfaces of the main body housing 2a, an opening provided in the bottom surface of the battery pack 40 for exhaust air from the exhaust ports 5c on the left and right side surfaces of the main body housing 2a (FIG. 20). The inside of the battery pack 40 can be cooled by exhausting the air toward the second openings 45) of (A) and (B) and passing the exhaust air through the cooling air passage inside the battery pack 40. The circuit of FIG. 7 can be used when two battery packs 40 are connected in series, and the circuit of FIG. 8 can be used when two battery packs 40 are connected in parallel.

Other configurations are the same as those of the first embodiment, and the battery pack 40 as an AC power source or a DC power source can be selectively used according to the manual operation flow of FIG.

A fifth embodiment of the present invention will be described with reference to FIG. In this fifth embodiment, the mounting posture of the battery pack 40 is different from that in the first embodiment. That is, the battery pack mounting portion 2b is provided in the main body housing 2a of the main body 2 of the dust collector 1, but the bottom surface of the battery pack 40 is facing upward. Then, the connection terminal portion 25 is fixed downward on the lower side of the ceiling surface of the battery pack mounting portion 2b. Therefore, the connection terminal portion 25 is arranged so that dust and the like are unlikely to adhere to the connection terminal portion 25.

Other configurations are the same as those of the first embodiment, and the battery pack 40 as an AC power source or a DC power source can be selectively used according to the manual operation flow of FIG.

13 (A), 13 (B) and 14 show a sixth embodiment of the present invention. The sixth embodiment is different from the first embodiment in that the DC motor 3B is used instead of the AC motor 3A and the AC / DC converter 32 is used instead of the inverter 30. Other than this, it is the same as that of the first embodiment. The AC / DC converter 32 has a function as a step-down circuit that steps down AC100V of a commercial AC power supply to a DC voltage suitable for the operation of the DC motor 3B.

The DC motor 3B can be connected to the battery pack 40 via the switch 21 and the manual power supply changeover switch (SW) 20 arranged on the operation panel portion 17 of FIG. The DC motor 3B can also be connected to the power cord 19 via a switch 21 arranged on the operation panel portion 17, a manual power supply changeover switch 20, and an AC / DC converter 32 arranged at an appropriate position in the main body. Further, the battery pack 40 is connected to the power cord 19 via a charging circuit 31 arranged at an appropriate position in the main body, and the battery pack 40 can be charged even while the DC motor 3B is being driven by the electric power supplied through the power cord 19. Is.

The AC / DC converter 32 has a structure in which the exhaust air of the dust collecting fan 4 and the suction and exhaust air of the self-cooling fan 7 cool the AC / DC converter 32 as in the inverter 30 of the first embodiment.

FIG. 14 shows a manual operation flow according to the sixth embodiment, showing a case where the use of a DC power supply is prioritized. When using the dust collector 1 of FIG. 1, the user of the dust collector 1 first determines whether or not the battery pack 40 is attached to the battery pack attachment portion 2b (whether or not there is a rechargeable battery) (S11), and then attaches the battery pack 40. If so (S11: YES), the user switches the power supply changeover switch 20 to the side where the dust collector can receive the DC power supply as shown in FIG. 13 (B) (S12). Then, when the user operates the switch 21 (S13), the DC motor (DC motor) 3B is driven and the dust collecting fan 4 is rotated.

If the battery pack 40 is not attached to the battery pack attachment portion 2b (S11: NO), then it is determined whether the power cord 19 can be plugged into an outlet (whether AC100V is present) (S14). If it can be plugged in (S14: YES), the user plugs the power cord 19 into an outlet and sets the power changeover switch 20 on the side where the dust collector 1 can receive the AC power supply as shown in FIG. 13 (A). Switch (S15). As a result, the AC power can be switched to DC power by the AC / DC converter 32 (S16), and when the user operates the switch 21 (S13), the DC motor 3B is driven and the dust collecting fan 4 rotates. To do.

A seventh embodiment of the present invention will be described with reference to FIG. The seventh embodiment is different from the first embodiment in that an AC brushless motor is used as the motor 3 of FIG. 4 and an inverter for motor control is further added. Other than this, it is the same as that of the first embodiment.

When using the dust collector 1, the user of the dust collector first determines whether or not the power cord 19 of the dust collector 1 can be plugged into an outlet (whether AC100V is present) (S21), and if it can be plugged in (S21:). YES), the user plugs the power cord 19 into the outlet and switches the power changeover switch (SW) 20 to the side where the dust collector can receive the AC power supply (S22). Then, the brushless motor can be controlled by the motor control inverter (S23), and when the user operates the switch 21 (S24), the alternating current (AC) brushless motor is driven and the dust collecting fan 4 is rotated.

If the power cord 19 cannot be plugged into the outlet (S21: NO), then it is determined whether the battery pack 40 is attached to the battery pack mounting portion 2b (whether there is a rechargeable battery) (S25). If the battery pack 40 is attached (S25: YES), the user switches the power supply changeover switch 20 to the side where the dust collector can receive the DC power supply (S26). As a result, the DC power can be switched to AC power by the inverter 30 (S27), and the brushless motor can be controlled by the motor control inverter (S23). (S24), the AC brushless motor is driven, and the dust collecting fan 4 rotates.

According to the seventh embodiment, the size of the main body of the dust collector can be reduced by adopting the brushless motor.

16 (A), 16 (B) and 17 show an eighth embodiment of the present invention. The eighth embodiment is different from the first embodiment in that the automatic power supply changeover switch (SW) 22 is used instead of the manual switch 20. Other than this, it is the same as that of the first embodiment.

The automatic power supply changeover switch 22 is composed of a switch unit 22A and a switch unit operation unit 22B. The switch unit 22A is provided in place of the manual switch 20 of the first embodiment, and the switch unit operation unit 22B has a power cord 19 And is electrically connected to the switch unit 22A. The switch unit operation unit 22B can automatically determine whether or not the power cord 19 is connected to the outlet (whether or not AC100V is present), and can automatically switch the switch unit 22A according to the determination result. ..

In the operation flow of FIG. 17, when using the dust collector 1, the user of the dust collector first determines whether or not the power cord 19 of the dust collector 1 can be plugged into an outlet (whether AC100V is present) (S31), and then plugs it in. If possible (S31: YES), the user plugs the power cord 19 into an outlet, and the switch unit operation unit 22B of the automatic power changeover switch (SW) 22 has the dust collector 1 as an AC power source as shown in FIG. 16 (A). The switch unit 22A is automatically switched to the side that can receive the supply (S32). Then, when the user operates the switch 21 (S33), the AC motor (AC motor) 3A is driven and the dust collecting fan 4 is rotated.

If the power cord 19 cannot be plugged into the outlet (S31: NO), then it is determined whether the battery pack 40 is attached to the battery pack mounting portion 2b (whether there is a rechargeable battery) (S34). If the battery pack 40 is attached (S34: YES), the switch unit operation unit 22B of the automatic power supply changeover switch (SW) 22 can receive the DC power supply from the dust collector as shown in FIG. 16B. The switch unit 22A is automatically switched to the side (S35). As a result, the DC power can be switched to AC power by the inverter 30 (S36), and when the user operates the switch 21 (S33), the AC motor 3A is driven and the dust collecting fan 4 is rotated.

According to the eighth embodiment of the present invention, since the automatic power supply changeover switch 22 including the switch unit 22A and the switch unit operation unit 22B is provided, the user of the dust collector can use the manual switch 20 according to the first embodiment or the like. It is not necessary to switch, and the operability of the dust collector can be improved.

Further, the automatic power supply changeover switch (SW) 22 switches so that power based on the AC power supply can be supplied to the motor 3A when the power cord 19 is connected to the AC power supply, and when the AC power supply is not connected. Is switched so that the electric power based on the battery pack 40 as the DC power source can be supplied to the motor 3A, so that the AC power source can be preferentially used when both the DC power source and the AC power source are available.

A ninth embodiment of the present invention will be described with reference to FIGS. 18A and 18B. The ninth embodiment is different from the sixth embodiment (FIG. 13) in that the automatic power supply changeover switch (SW) 22 is used instead of the manual switch 20. Other than this, it is the same as that of the sixth embodiment.

The automatic power switch 22 is composed of a switch unit 22A and a switch unit operation unit 22B as in the eighth embodiment, and is provided with a switch unit 22A in place of the manual switch 20 of the sixth embodiment. The unit operation unit 22B is electrically connected to the power cord 19 and the switch unit 22A. The switch unit 22B can automatically switch the switch unit 22A, select an AC power supply as shown in FIG. 18 (A), or use a battery pack as a DC power supply as shown in FIG. 18 (B). 40 can be selected to drive the DC motor 3B.

A tenth embodiment of the present invention will be described with reference to FIG. FIG. 5 of the first embodiment is in the operation flow of FIG. 19 in that the battery pack 40 is controlled to be charged while the AC motor 3A is being driven by the supply of electric power from the commercial AC power source. It is different from the operation flow of. Other than this, it is the same as that of the first embodiment.

When using the dust collector 1, the user of the dust collector 1 first determines whether or not the battery pack 40 is attached to the battery pack attachment portion 2b (whether or not there is a rechargeable battery) (S41). If it is attached (S41: YES), it is determined whether or not the battery pack 40 has a remaining amount (S42). If the battery pack 40 has a remaining capacity (S42: YES), the user then switches the power changeover switch (SW) 20 to the side where the dust collector can receive the DC power supply (S43). As a result, the DC power can be switched to AC power by the inverter 30 and can be boosted (S44), and when the user operates the switch 21 (S49), the AC motor (AC motor) 3A is driven to drive the dust collection fan. 4 rotates.

If the battery pack 40 is not attached (S41: NO), then it is determined whether the power cord 19 of the dust collector 1 can be plugged into an outlet (AC100V is present) (S47), and if it can be plugged in. (S47: YES), the user plugs the power cord 19 into the outlet and switches the power changeover switch (SW) 20 to the side where the dust collector can receive the AC power supply (S48). Then, when the user operates the switch 21 (S49), the AC motor 3A is driven and the dust collecting fan 4 is rotated.

Next, when the battery pack 40 is full (S42: NO), then it is determined whether the power cord 19 of the dust collector 1 can be plugged into an outlet (AC100V is present) (S45). If it can be plugged in (S45: YES), the user plugs the power cord 19 into the outlet to charge the battery pack 40 (rechargeable battery charging) (S46). Next, the power changeover switch 20 is switched to the side where the dust collector can receive the supply of AC power (S48). Then, when the user operates the switch 21 (S49), the AC motor 3A is driven and the dust collecting fan 4 is rotated.

According to the tenth embodiment, since electric power can be supplied to the motor 3A and the charging circuit 31 at the same time, the motor 3A is driven by using a commercial AC power source to collect dust, and at the same time, the battery pack 40 is used. It can be charged.

FIG. 21 is an application example of the present invention, and shows a case where the dust collector 1 of the present invention and the dust collecting circular saw 50 as a tool with a dust collecting function are interlocked with each other. The dust collector 1 and the dust collecting circular saw 50 are connected by a dust collecting hose 35, and the dust collecting circular saw 50 is arranged on the mating material 60 and represents a state immediately before starting work. After that, when the dust collector 1 and the circular saw 50 are started and the work is started, the circular saw 50 advances to the right in FIG. 21 while cutting the mating material, and at this time, the chips at the time of cutting are scattered around. It is collected by the dust collector 1 through the dust collecting hose 35 without doing so.

According to this application example, the following effects can be obtained.

(1) Both the dust collector 1 and the dust collecting circular saw 50 can operate cordlessly, and can work anywhere.

(2) Even if the dust collecting circular saw 50 runs out of battery, the work can be resumed immediately by replacing it with the battery pack 40 of the dust collector 1.

(3) The dead battery pack 40 can be charged by the dust collector 1 (when driven by a commercial AC power supply), further improving workability.

Although the present invention has been described above by taking the embodiment as an example, 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 embodiment within the scope of the claims. By the way. Hereinafter, a modified example will be touched.

In each of the above embodiments, the battery pack 40 as a DC power source is cooled by the exhaust of the dust collecting fan 4 and the self-cooling fan 7, but the battery pack 40 as a DC power source is cooled by the intake air of the self-cooling fan 7 ( For example, the intake air may be passed through the cooling air passage inside the battery pack). In this case, the battery pack may be cooled by intake air in a plurality of directions.

As the battery pack as a DC power source, there are a slide type that is slid and attached to the main body, a plug-in type that is inserted into the main body and attached, and the like. It may be a battery pack. Further, the battery pack may be configured to have a protection circuit so as not to be in an over-discharged state. Further, by variously changing the arrangement of the battery pack, the external dimensions of the main body of the dust collector can be freely changed, and the battery pack mounting direction (posture) can also be freely changed. Further, when a plurality of battery packs (two or more) are used, the suction power of the dust collector, the usable time, and the like can be freely set by electrically connecting the battery packs in series or in parallel.

In addition, the material, shape, quantity, arrangement, etc. of each constituent member can be appropriately changed as long as the object of the present invention can be achieved.

1 Dust collector 2 Main body 2a Main body housing 2b Battery pack mounting part 3 Motor 4 Dust collector fan 5a. 5b, 5c Exhaust port 6 Intake port 7 Self-cooling fan 10 Dust case 11 Suction port 12 Filter device 17 Operation panel 19 Power cord 20 Manual power switch 21 Switch 22 Automatic power switch 22A Switch 22B Switch operation 25 Connection Terminal 30 Inverter 31 Charging circuit 32 AC / DC converter 35 Dust collection hose 40 Battery pack 43 Connection terminals 44, 45 Opening

Claims (10)

A dust case with an opening at the top and
A main body housing arranged so as to close the opening of the dust case, and
The motor built into the main body housing and
A dust collecting fan that is rotationally driven by the motor,
A power path that can supply AC power and
A plurality of battery packs as a DC power source, each of which has a plurality of built-in secondary batteries and is detachably attached to the main body housing.
A booster circuit that boosts the power from the DC power supply and supplies it to the motor.
A charging circuit for charging the DC power source with the electric power of the AC power source is provided.
The motor has a drive shaft that extends in the vertical direction and is rotationally driven by power supply from the power supply path or the booster circuit, and a self-cooling fan that rotates integrally with the drive shaft to cool the motor itself drives the motor. Fixed to the upper end side of the shaft ,
The upper end of the self-cooling fan is located below the upper end of each of the plurality of battery packs and above the lower end, and the upper end of the booster circuit and the charging circuit is located above the upper end of the self-cooling fan. Is located below, and the booster circuit and the lower end of the charging circuit are located above the lower end of the motor, and the intake air of the self-cooling fan cools the booster circuit and the charging circuit. ,
The plurality of battery packs are arranged so that the positions of the drive shafts in the axial direction overlap each other.
The motor has a lower end lower end of the plurality of battery packs, located below the lower end of the booster dose Michi及beauty said charging circuit is disposed from the opening so as to enter inside the dust case downwardly,
The plurality of battery packs, the booster circuit, and the charging circuit are located above the opening of the dust case, and are arranged within the arrangement range of the dust case in the front-rear, left-right directions.
The main body housing is formed in a rectangular shape when viewed in the vertical direction.
The plurality of battery packs are arranged between the motor and one side of the main body housing in a vertical view, and the booster circuit and the charging circuit are arranged on the opposite side of the motor and the main body housing in a vertical view. A dust collector characterized by being placed between. When the AC power supply is not connected and the DC power supply is connected, the DC power supply can be used, and when both the AC power supply and the DC power supply can be used, the AC power supply can be preferentially used. The dust collector according to claim 1, wherein the dust collector has an automatic switch. The dust collector according to claim 1 or 2, wherein when the AC power supply is used, electric power is supplied to the motor without going through the booster circuit. The booster circuit and the charging circuit are arranged on the side of the motor so that the height in the vertical direction is longer than the thickness in the radial direction about the drive shaft. The dust collector according to any one of 3 to 3. One of claims 1 to 4, wherein the main body housing is provided with a drive power supply display unit capable of visually recognizing which of the AC power supply and the DC power supply supplies power to the motor. Dust collector described in. Dust collector according to any one of claims 1 to 5, characterized in that it comprises a battery level display unit for displaying the remaining amount of the previous SL plurality of battery packs is mounted in the main housing. The plurality of battery packs are arranged on one side of the motor, and an operation unit having an operation switch capable of supplying electric power from the power source to the motor is arranged on the other side of the motor. The dust collector according to any one of claims 1 to 6, wherein the dust collector is provided. The dust collector according to any one of claims 1 to 7, wherein the plurality of battery packs are compatible with each other and can be used alone with one or more other types of tools. The booster circuit and the upper end of the charging circuit are arranged so as to be located between the upper end and the lower end of each of the plurality of battery packs, and the booster circuit and the charging circuit are arranged with the plurality of battery packs. dust collector according to any one of claims 1 to 8, characterized in that the position in the circumferential direction around the drive shaft is arranged such that different. One of claims 1 to 9, wherein each of the plurality of battery packs has a bottom surface provided with a connection terminal, and each of the bottom surfaces is arranged so as to be located on a single plane. Dust collector described in.

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