JP6236215B2 - Cleaner - Google Patents

Description

  The present invention relates to a cleaner using a brushless motor.

  As disclosed in Patent Document 1, the cleaner includes a motor housing, a grip housing connected to the rear portion of the motor housing, a dust collecting housing connected to the front portion of the motor housing, and a battery holding housing connected to the grip housing. It has been known.

JP 2010-178773 A

  In the conventional cleaner described above, since a battery pack having a large mass is attached to the battery holding housing located at the rear portion, the balance may be deteriorated.

  Accordingly, the object of the present invention is to provide a cleaner with a good balance.

In order to achieve the above object, the invention described in claim 1 is a motor housing, a grip housing connected to the rear part of the motor housing, a dust collecting housing connected to the front part of the motor housing, and a battery holding housing connected to the grip housing. And a brushless motor housed in the motor housing, having a fan that is rotated by the brushless motor, the brushless motor being disposed in front of the battery holding housing, and a brushless while the control circuit board for controlling the rotation of the motor is arranged to connect all of the wiring and the upper surface and sideways, the motor housing, the exhaust port is formed, the control circuit board, It is characterized in that it is disposed adjacent to the upper side than the exhaust port It is intended.
According to a second aspect of the invention, in the configuration of claim 1, the control circuit board is characterized in that it is disposed between the brushless motor and the battery holding housing.
According to a third aspect of the present invention, in the configuration of the first or second aspect , the control circuit board is held in an inclined posture with the front end facing upward.
According to a fourth aspect of the present invention, in any of the first to third aspects, an operation switch for driving the brushless motor is provided, and the control circuit board faces the operation switch. It is a feature.

According to the present invention, good balance can be expected, and improvement in operability and workability can be expected, and wiring can be performed easily.
In particular , the control circuit board can be cooled by the air flow. In addition, since the airflow passes through the lower surface side where the wiring is not connected, the control circuit board and the wiring can be protected from dust.

It is a perspective view of the cleaner of form 1. It is a longitudinal cross-sectional view of the cleaner of form 1. It is the sectional view on the AA line of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is a disassembled perspective view of a brushless motor, a case, and a base. It is CC sectional view taken on the line of FIG. It is a longitudinal cross-sectional view of the cleaner of form 2. It is the DD sectional view taken on the line of FIG. It is a perspective view of a motor housing part. It is the EE sectional view taken on the line of FIG. It is a longitudinal cross-sectional view of the cleaner of form 3. It is the FF sectional view taken on the line of FIG. It is the GG sectional view taken on the line of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Form 1]
FIG. 1 is a perspective view showing an example of the cleaner, FIG. 2 is a longitudinal sectional view thereof, and the cleaner 1 has a housing 2 in which left and right half housings 2a, 2b are assembled by screws 3, 3,. The housing 2 is connected to a motor housing 4 positioned substantially in the center in the front-rear direction (the right side in FIG. 1 is the front), a grip housing 5 connected to the rear portion of the motor housing 4, and a front portion of the motor housing 4. A dust collecting housing 6 and a battery holding housing 7 connected to the grip housing 5 are formed.

  First, a battery pack 8 serving as a power source is attached to the battery holding housing 7. The battery pack 8 is mounted by sliding slide rails 9 and 9 provided on the left and right sides of the upper surface between the guide rails 10 and 10 provided on the left and right of the battery holding housing 7 and sliding them forward. In a mounted state, terminals (not shown) provided on the battery pack 8 are coupled to the terminal block 11 provided on the battery holding housing 7 so that both are electrically connected. In this state, the battery pack 8 is located at the end of the housing 2. A button 12 that can be removed from the battery holding housing 7 by a finger operation is provided on the rear surface of the battery pack 8, and a strap 13 is provided between the grip housing 5 and the battery holding housing 7 at the top thereof. It has been.

  On the other hand, a control circuit board 14 and a brushless motor 15 are accommodated in the motor housing 2. First, the control circuit board 14 is molded with resin and is held in an inclined posture with the front end facing upward by receiving seats 16 and 16 erected on the inner surfaces of the half housings 2a and 2b, respectively. 17 is electrically connected to the terminal block 11. As shown in FIG. 3, a microcomputer 18 is mounted on the upper surface of the control circuit board 14, and six switching elements 19, 19. -Is installed. A smoothing capacitor 14 a for smoothing the voltage input from the battery power supply line 17 is mounted on the upper surface of the control circuit board 14. Here, since the battery power supply line 17, the signal lead wire 41, the lead wires 26 and 27, and the switch lead wire 21, which will be described later, are all connected to the upper surface of the control circuit board 14, the assembly of the control circuit board 14 is possible. Will improve.

  Further, the control circuit board 14 is electrically connected to the operation switch 20 provided on the upper portion of the grip housing 5 via the switch lead wires 21 and 21. This operation switch 20 is a pressing type in which the front side is an ON button 22 and the rear side is an OFF button 23. In front of the operation switch 20, a notification LED 24 for notifying the remaining battery level and an illumination LED 25 are accommodated. Then, they are electrically connected to the control circuit board 14 by lead wires 26 and 27, respectively. Reference numeral 28 denotes a lens provided on the irradiation side of the LEDs 24 and 25.

The brushless motor 15 includes a stator core 29 around which a coil 31 is wound via an electrical insulating member 30 on the inner peripheral side, a rotor shaft 34 having a rotating shaft 33 at the center, and a rotor 32 provided with a rotor core 34 and four permanent magnets. A disc-shaped sensor circuit board 35 is screwed to the rear end of the electrical insulating member 30. On the front surface of the sensor circuit board 35, as shown in FIG. 4, three rotation detecting elements 36, 36,... For detecting the position of the magnet of the rotor 32 and outputting a rotation detection signal are arranged. The coil 31 is electrically connected to the sensor circuit board 35 by extending the terminal rearward and penetrating the sensor circuit board 35. 37 is a screw for attaching the sensor circuit board 35, 38 is a protrusion protruding from the rear end face of the electrical insulating member 30 and fitting into a small hole of the sensor circuit board 35, and 39 is a coil connecting portion.
Further, an upward projecting piece 35a is formed on the upper part of the sensor circuit board 35, to which the output power supply line 40 from the control circuit board 14 and the signal lead wire 41 of the rotation detecting element 36 are respectively connected. ing. Since the output power supply line 40 and the signal lead wire 41 are connected to the rear surface of the sensor circuit board 35, the assemblability is improved.

  The brushless motor 15 including the sensor circuit board 35 is held by a cylindrical case 42 having a front portion opened and a rear portion closed. As shown in FIG. 5, this case 42 is divided into left and right half cases 43, 43 including a semicircular rear plate 44 and a semi-cylindrical side plate 45. The bosses 46 provided and the bosses 47, 47 protruding from the upper and lower sides of the side plates 45 are joined together by screws 48. The left and right rear plates 44, 44 are respectively provided with bearing holding recesses 44a for holding a bearing 49 that supports the rear end of the rotary shaft 33 in the assembled state. Further, at the upper end of each side plate 45, behind the boss 47, a notch 50 is formed through the protruding piece 35a of the sensor circuit board 35, and a plurality of through holes 51, 51 are formed on the side surface. A pair of connecting pieces 52, 52 are projected in the front.

  The case 42 is connected to a base 53 disposed in front of the case 42. The base 53 includes an inner ring 54 having a slightly larger diameter than the case 42, an outer ring 55 having a larger diameter than the inner ring 54, and a spiral rib 56 that concentrically connects the inner ring 54 and the outer ring 55. , 56... And a closing plate 57 that closes the front of the inner ring 54. Four bosses 58, 58... Corresponding to the connecting pieces 52, 52 of the case 42 are formed on the outer side of the inner ring 54. Therefore, by screwing the screw 59 penetrating each connecting piece 52 into the boss 58, the case 42 is inserted into the inner ring 54 and connected to the closing plate 57 as shown in FIG. In this state, the rotating shaft 33 of the brushless motor 15 passes through the closing plate 57 and protrudes forward. A bearing 60 is supported by a bearing holding portion 57 a provided on the closing plate 57 and supports the rotary shaft 33. A fan 61 is fixed to the front end of the rotary shaft 33.

Further, a baffle body 62 is provided in front of the base 53. The baffle body 62 has a cup shape larger in diameter than the fan 61 that covers the fan 61 from the front, and a large diameter portion 63 formed at the rear end is fitted to the outer ring 55 of the base 53 so that the baffle body 62 is 53. At the front center of the baffle body 62, a projecting portion 64 having a vent hole (not shown) is formed.
The base 53 and the baffle body 62 are held between partition walls 65 and 65 that are erected on the inner surface of the motor housing 4 at a predetermined interval in the front-rear direction. A rubber ring 66 is packaged. Here, the front end of the rubber ring 66 abuts the front partition wall 65 beyond the front end of the baffle body 62, and the rear end of the rubber ring 66 abuts the rear partition wall 65 beyond the rear end of the base 53. Yes. Therefore, the base 53 and the baffle body 62 are held by the motor housing 4 via the rubber ring 66 without directly contacting the motor housing 4.

Reference numeral 67 denotes a protrusion protruding from the outer periphery of the outer ring 55, and the rubber ring 66 has a protrusion 68 into which the protrusion 67 is fitted. The protrusions 68 are fitted into recesses (not shown) provided in the inner surface of the motor housing 4 so that the rotation of the rubber ring 66 and the base 53 is restricted.
On the other hand, 69 is an exhaust port formed on the side surface of the motor housing 4 behind the brushless motor 15, and a sponge plate 70 that covers the exhaust port 69 from the inside is attached to the inner surface of the motor housing 4.

  The dust collecting housing 6 has a dust collecting chamber 71 formed therein, and a suction cylinder 72 communicating with the dust collecting chamber 71 is mounted in front of the dust collecting chamber 71. 73 is a check valve provided at the rear end of the suction cylinder 72. The dust collection chamber 71 accommodates a bag-shaped paper pack 74 that communicates with the suction cylinder 72. Furthermore, an opening 75 is formed in the upper part of the dust collecting housing 6, and a lid 76 is provided in the opening 75. The lid 76 is rotatably connected about a shaft 77 disposed at the upper rear of the dust collecting housing 6 and is urged to rotate to the open side via a torsion spring 78. When the lid 76 is closed, The front end of the lid 76 is engaged with a stopper 79 provided at the front end of the opening 75 to maintain the closed state. When the button 80 provided at the front end of the dust collecting housing 6 is pushed in, the lid 76 with the stopper 79 released is opened.

  In the cleaner 1 configured as described above, when the ON button 22 of the operation switch 20 provided on the grip housing 5 is pressed, power is supplied from the battery pack 8 and the brushless motor 15 is driven. That is, the microcomputer 18 of the control circuit board 14 obtains a rotation detection signal indicating the position of the magnet of the rotor 32 from the rotation detection element 36 of the sensor circuit board 35 via the signal lead wire 41, thereby rotating the rotor 32. The state is acquired, the ON / OFF of each switching element 19 is controlled according to the acquired rotation state, and the rotor 32 is caused to flow through each coil 31 of the stator core 29 through the output power line 40 in order. It is intended to rotate.

  Thus, when the rotor 32 rotates and the rotating shaft 33 and the fan 61 rotate, the outside air is sucked from the suction cylinder 72 and passes through the paper pack 74 in the dust collecting chamber 71, and then passes through the protruding portion 64 of the baffle body 62. 61. A sponge plate 71 a is provided between the paper pack 74 and the protrusion 64 at the rear of the dust collection chamber 71. The air sent to the outer periphery of the fan 61 is turned rearward by the baffle body 62, is rectified between the inner ring 54 and the outer ring 55 of the base 53 through the ribs 56, flows backward, and is exhausted. It is discharged from the mouth 69 to the outside. Due to the air flow, the dust sucked together with the outside air from the suction cylinder 72 is captured by the paper pack 74 and stored in the paper pack 74. If dust accumulates, the paper pack 74 can be taken out from the opening 75 if the cover 76 is opened by pressing the button 80.

Here, since the air that has passed through the upper portion of the base 53 flows along the control circuit board 14 adjacent to the exhaust port 69, the control circuit board 14 and the switching element 19 on the lower surface thereof are also passed through the mold by this air flow. To be cooled. Further, since the notch 50 and the through hole 51 are formed in the case 42 that holds the brushless motor 15, a part of the air flow passes through the case 42, and the sensor circuit board is caused by this air flow. 35 is also cooled.
Since the base 53 supporting the brushless motor 15 is held by the motor housing 4 through the rubber ring 66 together with the baffle body 62, vibration generated by the rotation of the fan 61 is not easily transmitted to the motor housing 4. In particular, here, since the rear bearing 49 that supports the rotating shaft 33 is held by the case 42 and the brushless motor 15 is not in contact with the motor housing 4, the vibration of the brushless motor 15 is less likely to be transmitted. .

Thus, according to the cleaner 1 of the said form 1, since the brushless motor 15 is arrange | positioned ahead of the battery holding | maintenance housing 7, the whole balance becomes favorable and it can anticipate operativity and workability | operativity improvement.
Further, since the control circuit board 14 is accommodated in the motor housing 4, the distance between the control circuit board 14 and the brushless motor 15 is reduced and wiring can be performed easily. In particular, since the sensor circuit board 35 is fixed to the brushless motor 15, wiring between the control circuit board 14 and the sensor circuit board 35 is facilitated.
Further, the brushless motor 15 is accommodated in a case 42 including a pair of left and right halved cases 43, and the case 42 is connected to a base 53 that is elastically held in the housing 2. Transmission to the housing 2 can be effectively suppressed.

  In the first aspect, the brushless motor is accommodated in a case composed of a pair of half cases and the case is assembled to the base. However, the case is used as a base by using a brushless motor housed in a case that is not half. You may make it assemble to.

  Next, another embodiment of the present invention will be described. However, the same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted.

[Form 2]
In the cleaner 1A shown in FIG. 7, as shown in FIG. 8, the control circuit board 14 is divided into a first control circuit board 14A on which a microcomputer 18 is mounted and a second control circuit board 14B on which a switching element 19 is mounted. This is different from the first embodiment. Here, one of the receiving seats 16 is provided with a partitioning portion 16a that is inserted between the control circuit boards 14A and 14B so that the control circuit boards 14A and 14B are not in contact with each other. The second control circuit board 14B is provided with a heat sink 81 that covers the switching element 19 and dissipates heat from the switching element 19. A lead wire 82 connects the control circuit boards 14A and 14B.

The brushless motor 15 here is not covered with a case, and the stator core 29 is directly inserted into the inner ring 54 of the base 53, and as shown in FIGS. 9 and 10, the left and right half housings 2a, 2b It is hold | maintained by the assembly seats 83 and 83 each standingly arranged by the inner surface. 57b is an abutting portion that stands on the rear surface of the closing plate 57 and positions the stator core 29 when the front end of the electrical insulating member 30 on the front side comes into contact therewith.
The assembly seat 83 includes a bearing holding portion 84 having a bearing holding recess 84 a that holds the bearing 49 on the rear end side of the rotating shaft 33, and a stator holding portion 85 that holds the stator core 29. A stepped shape 84 is higher than the stator holding portion 85.

Therefore, also in the cleaner 1A of the above-described form 2, by arranging the brushless motor 15 in front of the battery holding housing 7, the overall balance is improved and operability and workability can be expected to be improved.
In addition, since the first and second control circuit boards 14A and 14B are accommodated in the motor housing 4, the distance between the control circuit boards 14A and 14B and the brushless motor 15 is reduced, and wiring can be performed easily. In particular, since the sensor circuit board 35 is fixed to the brushless motor 15, wiring between the control circuit board 14 and the sensor circuit board 35 is facilitated.
In particular, since a case for holding the brushless motor 15 is not used here, the number of housings used as a whole is smaller than that of the first embodiment, which is advantageous in terms of cost.

[Form 3]
In the cleaner 1B shown in FIG. 11, the switching element 19 is not provided in the control circuit board 14 as shown in FIG. 12, but is mounted on the rear surface of the sensor circuit board 35 as shown in FIG. Is different from Form 1. Other configurations are the same as those of the first embodiment.
Therefore, also in the cleaner 1B of the third aspect, by arranging the brushless motor 15 in front of the battery holding housing 7, the overall balance is improved and operability and workability can be expected to be improved.
Further, since the control circuit board 14 is accommodated in the motor housing 4, the distance between the control circuit board 14 and the brushless motor 15 is reduced and wiring can be performed easily. In particular, since the sensor circuit board 35 is fixed to the brushless motor 15, wiring between the control circuit board 14 and the sensor circuit board 35 is facilitated.

  In addition, in common with each form, the positions of the control circuit board and the operation switch can be appropriately changed, and the operation switch may be a trigger type instead of a push button type. On the other hand, the battery pack is not limited to the above-described form, for example, adopting a structure for inserting and attaching the battery pack without being limited to the slide attachment.

  1, 1A, 1B · Cleaner · 2 · Housing · 4 · Motor housing · 5 · Grip housing · 6 · Dust collection housing · 7 · Battery holding housing · 8 · Battery pack · 14 · Control Circuit board, 15 ... Brushless motor, 19 ... Switching element, 20 ... Operation switch, 29 ... Stator core, 30 ... Electrical insulation member, 32 ... Rotor, 33 ... Rotary shaft, 35 ... Sensor circuit board , 36 ·· Rotation detecting element, 42 ·· Case, 43 ·· Half case, 53 ·· Base, 61 · · Fan, 62 · · Baffle body, 66 · · Rubber ring, 69 · · Exhaust port, · · · -Dust collection chamber, 72-Suction cylinder, 74-Paper pack, 76-Lid, 83-Assembly seat.

Claims (4)

A housing having a motor housing, a grip housing connected to a rear portion of the motor housing, a dust collecting housing connected to a front portion of the motor housing, and a battery holding housing connected to the grip housing;
A brushless motor housed in the motor housing,
A fan that is rotated by the brushless motor;
Together with the brushless motor forward is disposed than the battery holding housing, while the control circuit board for controlling the rotation of the brushless motor is arranged to connect all of the wiring and the upper surface in the sideways ,
An exhaust port is formed in the motor housing,
The cleaner , wherein the control circuit board is disposed adjacently above the exhaust port . The cleaner according to claim 1 , wherein the control circuit board is disposed between the brushless motor and the battery holding housing. Wherein the control circuit board, cleaner according to claim 1 or 2, characterized in that it is held in an inclined position in which the front end upward. An operation switch for driving the brushless motor is provided,
Wherein the control circuit board, cleaner according to any one of claims 1 to 3, characterized in that opposite to the operation switch.

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