阅读说明：本技术 搅拌机 (Mixer ) 是由 堀田凌平 于 2021-04-13 设计创作，主要内容包括：本发明涉及一种搅拌机。搅拌机(1)包括电机(4)、电机壳体(2)、减速部(7)、减速部壳体(3)、轴保持部(108)和控制器(5),其中,所述电机(4)具有定子(20)和转子(21)；所述电机壳体(2)用于收容电机(4)；所述减速部(7)由转子(21)驱动；所述减速部壳体(3)被配置于电机壳体(2)的下方,用于收容减速部(7)；所述轴保持部(108)从减速部壳体(3)的下部向下方突出,且能保持搅拌轴；所述控制器(5)用于控制电机(4),控制器(5)被配置为在上下方向上与电机(4)相同的高度。据此,能使上下方向的尺寸紧凑化。(The invention relates to a stirrer. The mixer (1) comprises a motor (4), a motor shell (2), a speed reduction part (7), a speed reduction part shell (3), a shaft holding part (108) and a controller (5), wherein the motor (4) is provided with a stator (20) and a rotor (21); the motor shell (2) is used for accommodating a motor (4); the speed reduction part (7) is driven by a rotor (21); the speed reduction part shell (3) is arranged below the motor shell (2) and is used for accommodating the speed reduction part (7); the shaft holding part (108) protrudes downwards from the lower part of the speed reduction part shell (3) and can hold the stirring shaft; the controller (5) is used for controlling the motor (4), and the controller (5) is configured to be at the same height as the motor (4) in the vertical direction. Accordingly, the vertical dimension can be made compact.)

1. A stirring machine is characterized in that the stirring machine is provided with a stirring cylinder,

comprises a motor, a motor shell, a speed reducing part shell, a shaft holding part and a control part, wherein,

the motor has a stator and a rotor;

the motor shell is used for accommodating the motor;

the decelerating section is driven by the rotor;

the speed reduction part housing is arranged below the motor housing and used for accommodating the speed reduction part;

the shaft holding part protrudes downwards from the lower part of the speed reducing part shell and can hold the stirring shaft;

the control part is used for controlling the motor,

at least a part of the control portion is configured to be at the same height in the up-down direction as at least a part of the motor.

2. A mixer according to claim 1,

the rotor has a rotating shaft, and the motor is housed in the motor housing in a posture in which the rotating shaft extends in the vertical direction.

3. A mixer according to claim 2,

the control unit is housed in the motor housing in a posture extending in a vertical direction.

4. A mixer according to claim 2 or 3,

the size of the control portion is controlled within the size of the rotating shaft in the vertical direction.

5. A stirring machine is characterized in that the stirring machine is provided with a stirring cylinder,

comprises a motor, a motor shell, a speed reducing part shell, a shaft holding part and a control part, wherein,

the motor has a stator and a rotor;

the motor shell is used for accommodating the motor;

the decelerating section is driven by the rotor;

the speed reduction part housing is arranged below the motor housing and used for accommodating the speed reduction part;

the shaft holding part protrudes downwards from the lower part of the speed reducing part shell and can hold the stirring shaft;

the control part is used for controlling the motor,

the control unit is configured to assume a posture extending in the vertical direction in the motor housing.

6. A mixer according to claim 5,

the rotor has a rotating shaft, and the motor is housed in the motor housing in a posture in which the rotating shaft extends in the vertical direction.

7. A mixer according to claim 6,

the size of the control portion is controlled within the size of the rotating shaft in the vertical direction.

8. A blender as claimed in any one of claims 1 to 7,

the rotor has a fan that is integrally rotatable,

the motor housing having an air inlet and an air outlet, wherein the air inlet is for drawing air by rotation of the fan; the exhaust port is used for exhausting air,

the air inlet and the air outlet are configured to have the same height in the up-down direction.

9. A mixer according to claim 8,

the rotor has a rotating shaft for fixing the fan, and the motor is housed in the motor housing in a posture in which the rotating shaft extends in the vertical direction.

10. A mixer according to claim 8 or 9,

there is a control portion for controlling the motor, the control portion being disposed at a position where an air flow from the air inlet to the air outlet contacts.

11. A mixer according to claim 10,

the motor is disposed on a downstream side of the air flow, and the control unit is disposed on an upstream side of the air flow.

12. A mixer according to claim 11,

the motor and the control portion are separated by a rib for forming the air flow.

13. A blender as claimed in any of claims 10 to 12,

the control portion is configured to be in a posture extending in an up-down direction.

14. A blender as claimed in any of claims 8 to 13,

the air flow generated by the fan contacts the control part while moving up and down along the control part.

15. A blender as claimed in any one of claims 1 to 14,

a battery mounting portion is provided on an upper portion of the motor housing, and a battery pack can be mounted on the battery mounting portion.

16. A mixer according to claim 15,

a battery cover is provided on the motor housing, and covers the battery pack mounted on the battery mounting portion from above.

17. A blender as claimed in any one of claims 1 to 16,

an operating handle is mounted on the motor housing.

18. A blender as claimed in any one of claims 1 to 17,

the speed reduction unit can change the speed of rotation of the shaft holding unit in two stages.

19. A stirring machine is characterized in that the stirring machine is provided with a stirring cylinder,

comprises a motor, a fan, a motor housing, a speed reduction part housing and a shaft holding part, wherein,

the motor has a stator and a rotor;

the fan is rotatable integrally with the rotor;

the motor housing is configured to receive the motor and has an air inlet for drawing air by rotation of the fan and an air outlet for discharging air;

the decelerating section is driven by the rotor;

the speed reduction part housing is arranged below the motor housing and used for accommodating the speed reduction part;

the shaft holding part protrudes downwards from the lower part of the speed reducing part shell and can hold the stirring shaft,

at least a portion of the intake port is configured to be at the same height in the up-down direction as at least a portion of the exhaust port.

Technical Field

The present invention relates to a mixer for mixing flowable materials such as paint and mortar.

Background

There is known an agitator capable of agitating paint or the like by a blade rotating together with an agitating shaft (see, for example, patent document 1).

[ Prior Art document ]

[ patent document ]

Patent document 1: german utility model patent publication No. 202010014783

Disclosure of Invention

[ problem to be solved by the invention ]

In the agitator illustrated in patent document 1, the control of the motor is not particularly studied. However, the mixer can be easily used by adding a control unit for controlling the motor. In this case, the size of the mixer depends on the manner in which the control unit is arranged. In particular, the overall length in the vertical direction is related to the workability of the mixer.

In the agitator described in patent document 1, the motor is housed in the motor case with the rotation shaft thereof directed in the vertical direction, and the intake port and the exhaust port of the cooling air of the motor are formed to be distant from each other on the upper and lower sides of the motor case. Therefore, the overall length in the vertical direction (the extending direction of the stirring shaft) including the motor housing is increased, and there is a possibility that the operability is deteriorated.

Accordingly, an object of the present invention is to provide a mixer that can be made compact in vertical dimension.

[ solution for solving problems ]

In order to achieve the above object, in the present invention, the 1 st invention is characterized in that,

comprises a motor, a motor shell, a speed reducing part shell, a shaft holding part and a control part, wherein,

the motor has a stator and a rotor;

the motor shell is used for accommodating a motor;

the speed reduction part is driven by the rotor;

the speed reduction part shell is arranged below the motor shell and used for accommodating the speed reduction part;

the shaft holding part protrudes downwards from the lower part of the speed reducing part shell and can hold the stirring shaft;

the control part is used for controlling the motor,

at least a part of the control portion is configured to be at the same height as at least a part of the motor in the up-down direction.

In order to achieve the above object, in the present invention, the 2 nd invention is characterized in that,

comprises a motor, a motor shell, a speed reducing part shell, a shaft holding part and a control part, wherein,

the motor has a stator and a rotor;

the motor shell is used for accommodating a motor;

the speed reduction part is driven by the rotor;

the speed reduction part shell is arranged below the motor shell and used for accommodating the speed reduction part;

the shaft holding part protrudes downwards from the lower part of the speed reducing part shell and can hold the stirring shaft;

the control part is used for controlling the motor,

the control unit is disposed in a posture extending in the vertical direction in the motor housing.

In order to achieve the above object, the invention of claim 3 is characterized in that,

comprises a motor, a fan, a motor housing, a speed reduction part housing and a shaft holding part, wherein,

the motor has a stator and a rotor;

the fan can rotate integrally with the rotor;

the motor housing is configured to house a motor, and has an air inlet for sucking air by rotation of a fan and an air outlet for discharging the air;

the speed reduction part is driven by the rotor;

the speed reduction part shell is arranged below the motor shell and used for accommodating the speed reduction part;

the shaft holding part protrudes downward from the lower part of the speed reduction part housing and can hold the stirring shaft.

At least a part of the intake port is configured to be the same height in the up-down direction as at least a part of the exhaust port.

[ Effect of the invention ]

According to the present invention, the vertical dimension can be made compact.

Drawings

FIG. 1 is a perspective view showing the whole of a mixer including a mixer shaft and blades.

FIG. 2 is a perspective view of a main body of the mixer.

FIG. 3 is a plan view of the main body of the mixer.

FIG. 4 is a rear view (with a portion shown in section) of the body portion of the blender.

Fig. 5 is a sectional view taken along line a-a of fig. 3.

Fig. 6 is an exploded perspective view of the body portion.

Fig. 7 is a cross-sectional view taken along line C-C of fig. 5 (with the lever omitted).

Fig. 8 is a side view of the main body portion in a state where the battery cover is opened.

Fig. 9 is an exploded perspective view of the lever.

Fig. 10 is an enlarged sectional view taken along line B-B of fig. 3.

Fig. 11 is a perspective view showing a state in which the lever is attached to the motor housing.

Fig. 12 is a bottom view of the speed reduction part casing.

Fig. 13 is a cross-sectional view taken along line D-D of fig. 12 (low speed mode).

Fig. 14 is a cross-sectional view taken along line E-E of fig. 12 (low speed mode).

Fig. 15 is a sectional view showing a high-speed mode.

Description of reference numerals:

1: a blender; 2: a motor housing; 3: a speed reduction section casing; 4: a motor; 5: a controller; 6: an operating handle; 7: a deceleration section; 8: a main shaft; 9: a stirring shaft; 10: a blade; 11: a battery mounting portion; 12: a battery pack; 15: a support plate; 17: an inner housing; 25: a rotating shaft; 31: a fan; 32: an inner exhaust port; 33: an inner air inlet; 40: a rib; 41: an outer air inlet; 42: an outer exhaust port; 46: a control circuit substrate; 60: an installation part; 61: a connecting portion; 67A: a forearm; 67B: a rear arm; 68: a left handle; 69: a right handle; 70: a switch; 85: a 1 st axis; 86: a 2 nd axis; 108: a shaft holding portion.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a perspective view showing the entire rechargeable kneading machine 1 as an example of a kneading machine, fig. 2 is a perspective view of a main body portion, fig. 3 is a plan view, fig. 4 is a rear view showing a part in section, and fig. 5 is a sectional view taken along line a-a of fig. 3.

The mixer 1 includes a motor housing 2 and a speed reducer housing 3 as a main body. The motor housing 2 accommodates a motor 4 and a controller 5. An operation handle 6 is attached to the motor housing 2. The speed reducer section case 3 accommodates the speed reducer section 7. The reduction unit 7 has a main shaft 8 serving as an output shaft. The main shaft 8 protrudes downward from the reduction part housing 3. A stirring shaft 9 can be connected to the main shaft 8 in a coaxial manner. The lower end of the stirring shaft 9 is provided with blades 10.

A battery mounting portion 11 is provided at an upper portion of the motor housing 2. The battery pack 12 is slidably mounted on the battery mounting portion 11 from the front. A battery cover 13 is attached to an upper portion of the motor housing 2. The battery cover 13 can cover the battery pack 12 and the battery mounting portion 11 from above.

The motor housing 2 is formed of a pair of right and left split housings 2a, 2 b. The split cases 2a, 2b are assembled by a plurality of screws 14, 14 … … screwed from the right. A disc-shaped retainer plate 15 is assembled to the lower end of the motor housing 2. The carrier plate 15 is fixed from below together with the speed reducer section case 3 by a plurality of screws 16, 16 … …. As also shown in fig. 6, a bottomed cylindrical inner case 17 is attached to the upper side of the pallet 15 in a downward manner. The inner case 17 is made of an integrally molded resin and houses the motor 4. The inner case 17 is assembled from above to an assembly seat 18 formed on the upper surface of the pallet 15 by 4 screws 19, 19 … … (fig. 4).

The motor 4 is a brushless motor. The motor 4 is an inner rotor type including an outer stator 20 and a rotor 21 positioned inside the stator 20. The stator 20 is held in the inner case 17 with its axial center facing up and down. As shown in fig. 4 and 7, the stator 20 is fixed in the axial direction by screws 37, 37 and washers 38, 38 screwed from below in the inner housing 17. In addition, the upper portion of the stator 20 is fixed to the inner housing 17 in the rotational direction.

The stator 20 has a stator core 20a, an upper insulator 22A, a lower insulator 22B, and a plurality of coils 23, 23 … …. An upper insulator 22A and a lower insulator 22B are fixed to the stator core 20 a. The plurality of coils 23 and 23 … … are wound around the upper insulator 22A and the lower insulator 22B. Each coil 23 is insulated from the stator core 20a by an upper insulator 22A and a lower insulator 22B. Each coil 23 is connected to the upper insulator 22A in three phases. A sensor circuit board 24 is mounted on the upper insulator 22A. The sensor circuit board 24 includes a rotation detection element (not shown) for detecting the position of the permanent magnet 26 provided on the rotor 21.

The rotor 21 has a rotary shaft 25, a rotor core 21a, and a permanent magnet 26. The rotary shaft 25 extends in the vertical direction and penetrates the stator 20. A rotor core 21a is fixed around the rotation shaft 25. A plurality of permanent magnets 26 and 26 … … are fixed to a plurality of axial holes of the rotor core 21 a. A bearing holding portion 27 is provided at the upper end of the inner housing 17. The upper end of the rotary shaft 25 is rotatably supported by a bearing 28 held by a bearing holding portion 27. The lower portion of the rotary shaft 25 is rotatably supported by a bearing 29 held by the assembly mount 18. The lower end of the rotary shaft 25 penetrates the pallet 15 and protrudes into the reduction gear unit casing 3. A pinion (gear) 30 is formed at the lower end of the rotary shaft 25.

A fan 31 is provided below the rotary shaft 25 between the bearing 29 and the rotor core 21 a. As shown in fig. 6 and 7, a plurality of inner exhaust ports 32 and 32 … … are formed radially outward of the fan 31 and forward and rearward of the inner casing 17. The inner exhaust port 32 is a hole formed in the inner casing 17 and penetrating in the radial direction. The inner exhaust port 32 is located at a lower portion of the inner housing 17. A plurality of inner intake ports 33 and 33 … … are formed in the upper part of the inner housing 17 around the bearing holding portion 27. The inner intake port 33 is a hole formed in the inner case 17 and penetrating in the vertical direction.

As shown in fig. 5 to 7, a projection 34 extending in the vertical direction is formed at the front surface of the inner housing 17 and at the center in the horizontal direction. The upper end of the projection 34 is open at a position lower than the upper surface of the inner housing 17. As shown by the two-dot chain line in fig. 5, the three-phase power supply line 35 is led out to the outside of the inner case 17 through the protruding portion 34 and above the inner case 17. As shown by the two-dot chain line, the signal line 36 connected to the rotation detecting element of the sensor circuit board 24 is led out to the outside of the inner case 17 through the protruding portion 34 and above the inner case 17.

A pair of left and right ribs 40, 40 are provided in the motor housing 2 so as to be aligned with the protrusions 34. Each rib 40 is formed to protrude inward from the inner surfaces of the split cases 2a and 2b so as to face the ridge portion 34. Each rib 40 is formed at a height higher than the ridge portion 34 and lower than the inner case 17. The respective distal ends of the left and right ribs 40, 40 abut on the left and right side surfaces of the ridge portion 34. The ribs 40, 40 divide the interior of the motor housing 2 into front and rear parts, in addition to the upper side of the inner housing 17 and the motor 4.

A plurality of external air inlets 41, 41 … … are formed on the left and right side surfaces of the split cases 2a, 2b and in front of the ribs 40, 40. Each of the outer air inlets 41 is a slit extending in the circumferential direction of the motor housing 2, and is formed at a predetermined interval in the vertical direction as shown in fig. 2 and 6. A plurality of outer exhaust ports 42, 42 … … are formed on the left and right side surfaces of the split cases 2a, 2b and behind the ribs 40, 40. Each outer exhaust port 42 is a slit extending in the vertical direction and is formed at a predetermined interval in the circumferential direction of the motor housing 2. As shown in fig. 2, of the outer intake ports 41, 41 … … arranged vertically, the lower 2 outer intake ports 41, 41 overlap the outer exhaust ports 42 in the circumferential direction of the motor housing 2. That is, a part of the outer intake port 41 and the outer exhaust port 42 are located at the same height in the up-down direction.

The controller 5 is disposed in the motor housing 2 in front of the ribs 40, 40. The controller 5 extends vertically and horizontally along a plane defined in the vertical and horizontal directions. The length of the controller 5 in the up-down direction is shorter than the length of the rotation shaft 25 in the up-down direction, and is controlled within the size of the rotation shaft 25 in the up-down direction. That is, the controller 5 is located at the same height in the up-down direction as the motor 4.

In the controller 5, the control circuit board 46 is housed in an aluminum case 45 which is a material having high heat dissipation properties. A microcomputer, a plurality of switching elements, and the like are mounted on the control circuit board 46, and the mounting surface is housed in the housing 45 so as to face outward (front side). As shown in fig. 5 and 7, the outer case 45 holds both left and right ends by support ribs 47, 47 provided on the inner surfaces of the split cases 2a, 2b in a protruding manner, respectively. The left and right outer intake ports 41, 41 are located on the left and right outer sides of the controller 5. A heat dissipation portion 48 (fig. 6) formed of a plurality of projections and recesses is formed on the rear surface of the housing 45. The heat dissipation portion 48 is exposed from the support rib 47 in the vertical direction (fig. 5).

The battery mounting portion 11 is formed above the inner housing 17 and on the upper surface of the motor housing 2. The battery mounting portion 11 has a pair of right and left guide rails 50, 50 extending in the front-rear direction. The guide rails 50, 50 receive the battery pack 12 in the connection side-down posture from the front. A terminal block 51 is provided between the guide rails 50, 50. Terminal blocks 52 and 52 … … for electrically connecting the assembled battery 12 to be mounted are provided on the upper surface of the terminal block 51. Leads 53A and 53B are drawn from the lower surface of the terminal block 51.

The power line 35 and the signal line 36 of the motor 4 are pulled back to the front of the controller 5 through the upper side of the controller 5. Further, the power supply line 35 and the signal line 36 are connected to the front surface of the control circuit substrate 46. Of the lead wires 53A and 53B drawn out from the terminal block 51, the lead wire 53A connected to the controller 5 is drawn out to the upper side of the internal case 17 and the controller 5. The lead 53A is connected to a lead 55 drawn out from the front surface of the control circuit board 46 via a connector 54. The lead wire 53B connected to the switch 70 of the operation handle 6 is drawn rearward above the inner case 17. The lead wires 77A from the switch 70 are led out to the outside from a wiring port 78 provided on the rear surface of the motor housing 2.

The battery cover 13 is a box shape having a rectangular plan view with an open lower end. The rear lower end of the battery cover 13 is rotatably attached to the rear upper end of the motor housing 2 by left-right direction screws 56.

The battery cover 13 is rotatable about the screw 56 to a closed position, in which the battery cover 13 closes the battery pack 12 and the battery mounting portion 11, and an open position, as shown in fig. 5; as shown in fig. 8, in the open position, the battery cover 13 opens the battery pack 12 and the battery mounting portion 11. A locking portion 57 is provided at the front lower end of the battery cover 13 in a protruding manner. A locked portion 58 for locking the locking portion 57 at the closed position of the battery cover 13 is formed at the front upper end of the motor housing 2. The foremost surface 13a of the battery cover 13 in the closed position has a planar shape defined in the vertical, horizontal, and vertical directions. In addition to the engaged portion 58, the upper foremost surface 2c of the motor housing 2 has a planar shape defined in the vertical and horizontal directions. The foremost surface 2c of the motor housing 2 and the foremost surface 13a of the battery cover 13 are continuous in the vertical direction. As shown in fig. 3, the rear end of the battery cover 13 in the closed position slightly protrudes outward from the motor housing 2 in the right and left directions and partially overlaps the operation lever 6 in the vertical direction.

The operation handle 6 has a mounting portion 60, a left grip 68, a right grip 69, and connecting portions 61, 61 connecting the mounting portion 60 and the left and right grips 68, 69. The mounting portion 60 is mounted to the motor housing 2. The connection portions 61, 61 are connected to the left and right sides of the mounting portion 60.

The mounting portion 60 is formed in a U shape in a plan view and is made of a thin sheet metal having a thin upper and lower wall. The connecting portion 61 is made of sheet metal formed integrally with the mounting portion 60. As shown in fig. 9, the mounting portion 60 has a plurality of upper mounting holes 62, 62 formed along a U-shape. As shown in fig. 6, 3 support projections 63 and 63 … … for supporting the mounting portion 60 from below are formed on the outer peripheral surfaces of the left and right split cases 2a and 2b, respectively. Each of the support projections 63 has a lower mounting hole 64 formed therein corresponding to the upper mounting hole 62 of the mounting portion 60. On the split case 2a, a convex portion 65 is formed on the upper side of the center support projection 63. A notch 66 is formed in the inner edge of the left side of the mounting portion 60. By aligning the projection 65 with the notch 66, the left-right direction of the operation handle 6 is determined.

The connecting portions 61, 61 have a pair of front arms 67A and rear arms 67B integrally extending laterally outward from the front end and rear end of the mounting portion 60, respectively. When the front arm 67A and the rear arm 67B are divided into left and right, symbols "L" and "R" are denoted as "67 LA" and "67 RA".

A left handle 68 is bridged between left end portions of the front arm 67LA and the rear arm 67LB on the left side. A right handle 69 is provided between right ends of the right front arm 67RA and the right rear arm 67 RB. As shown in fig. 9, the left grip 68 is divided into two upper and lower split portions 68a and 68b each having a split plane in the front-rear direction. Front and rear ends of the split portions 68a, 68b are simultaneously screwed into through holes 61a, 61a provided in left end portions of the front arm 67LA and the rear arm 67LB by screws 68c, 68 c. The left grip 68 is formed only for the operator to hold without providing any special built-in components.

The right grip 69 is divided into left and right split portions 69a, 69b each having a split plane in the front-rear direction, and as shown in fig. 8 and 10, the split portions 69a, 69b are assembled with each other by left and right screws 69c, 69 c. Both front and rear ends of the right grip 69 are screwed to through holes 61a, 61a provided at right ends of the front arm 67RA and the rear arm 67RB, respectively, by screws 69d, 69 d.

As shown in fig. 9 and 10, a plurality of built-in components (a switch 70, a trigger 71, a lock button 72, a button cover 73, a lock lever 74, and an adjustment dial 75) are provided in the left and right halves 69a and 69b of the right grip 69.

First, the switch 70 is provided inside the split portions 69a and 69 b. The trigger 71 of the switch 70 is projected downward. However, the opening peripheral edge 69e of the lower surface of the right grip 69, which exposes the trigger 71, is located below the lower surface of the trigger 71.

A lock button 72 is provided on the left side surface of the switch 70. The lock button 72 is provided for maintaining the pressed state of the trigger 71. The lock button 72 is provided with a button cover 73 protruding from the right grip 69. The lock button 72 is exposed from the left side surface of the right grip 69 and can be operated by an operator.

A lock lever 74 is provided on the front side of the switch 70. The lock lever 74 is slidably operable to a position to prevent depression of the trigger 71 and a position to permit depression. The lock lever 74 is exposed from the right side surface of the right handle 69 and can be operated by the operator.

An adjustment dial 75 is provided on the front side of the lock lever 74. The adjustment dial 75 can adjust the rotation speed of the motor 4 by a rotation operation. The adjustment dial 75 is exposed from the right grip 69 and can be operated by the operator.

The lead cover 76 is screwed to the rear arm 67RB of the right connecting portion 61 and the upper surface of the mounting portion 60 by a screw 76 a. As shown in fig. 5, the lead wire 77A connected to the switch 70 in the right grip 69 and the lead wire 77B connected to the substrate of the adjustment dial 75 are pulled back into the lead cover 76. The lead wires 77A, 77B are first wired from the front to the rear of the right grip 69, and then are drawn out from the rear of the right grip 69 to the outside of the right grip 69. After that, the leads 77A, 77B pass through the space in the vertical direction between the lead cover 76 and the rear arm 67RB, and are pulled back from right to left. After that, the wire is routed into the motor housing 2 through a wire distribution port 78 formed in the rear surface of the motor housing. As shown by the two-dot chain line in fig. 5, the lead wires 77A of the switch 70 pass through the upper side of the inner case 17 and are connected to the front surface of the control circuit board 46 and the lead wires 53B of the terminal block 51, respectively. As shown by the two-dot chain line in fig. 5, the lead wires 77B of the adjustment dial 75 pass through from the upper side of the inner case 17 and are wired on the front surface of the control circuit substrate 46.

As shown in fig. 11, the attachment portion 60 of the lever 6 is placed on the support projections 63, 63 … … from above and behind the motor housing 2 in a state where the U-shaped opening side is directed forward. At this time, the notch 66 is aligned with the projection 65. Then, the bolts 79 and 79 … … are passed through the upper mounting holes 62 and the lower mounting holes 64 from above, and then tightened with nuts. Then, as shown in fig. 3, the operation lever 6 is fixed to the motor housing 2. In the fixed state of the operation handle 6, the front surfaces of the motor housing 2 and the battery cover 13 are located rearward of a straight line L in the left-right direction indicated by a one-dot chain line connecting the front ends of the left and right connecting portions 61, 61. The rear end of the mounting portion 60 is located rearward of the rear surfaces of the motor housing 2 and the battery cover 13. Since it is not necessary to insert the motor housing 2 and the battery cover 13 through the mounting portion 60, the mounting can be easily performed.

As shown in fig. 4, 7, and 8, the speed reducer section housing 3 is fixed to the lower surface of the motor housing 2 from below by 4 screws 16 and 16 … …. As shown in fig. 6, the speed reducer section case 3 is fixed to the pallet 15 by 4 screws 80 and 80 … … from above. As shown in fig. 6, 4 pins 81 and 81 … … protruding upward are provided on the upper surface of the speed reducer section casing 3. The pins 81 and 81 … … penetrate the blade 15 and penetrate the lower surface of the motor housing 2.

As shown in fig. 12 and 13, the speed reducer 7 includes a 1 st shaft 85, a 2 nd shaft 86, and a main shaft 8 in the front-rear direction. The 1 st shaft 85, the 2 nd shaft 86, and the main shaft 8 extend in the vertical direction, respectively, the 2 nd shaft 86 is disposed in front of the 1 st shaft 85, and the main shaft 8 is disposed in front of the 2 nd shaft 86. That is, the 1 st shaft 85 is disposed at the rearmost position, and the main shaft 8 is disposed at the foremost position. The 2 nd shaft 86 is disposed between the 1 st shaft 85 and the main shaft 8. The shafts 85, 86 and the upper end of the main shaft 8 are supported by bearings 87, 87 … … held by the pallet 15, respectively. The lower ends of the shafts 85, 86 and the main shaft 8 are supported by bearings 88, 88 … … held by the speed reducer section casing 3, respectively.

An input gear 89 that meshes with the pinion 30 of the rotary shaft 25 is provided at an upper portion of the 1 st shaft 85. Below the input gear 89 and on the 1 st shaft 85, a 1 st drive gear portion 90 and a 2 nd drive gear portion 91 having different diameters and numbers of teeth are provided vertically.

The 2 nd shaft 86 has a 1 st driven gear 92 and a 2 nd driven gear 93 which are independently rotatable in the up-down position. The 1 st driven gear 92 meshes with the 1 st drive gear portion 90 of the 1 st shaft 85. The 2 nd driven gear 93 has a larger diameter than the 1 st driven gear 92 and meshes with the 2 nd drive gear part 91 of the 1 st shaft 85. The 1 st driven gear 92 and the 2 nd driven gear 93 are provided with a plurality of connecting pins 94 and 94 … … protruding toward mutually facing surfaces, respectively.

Between the 1 st driven gear 92 and the 2 nd driven gear 93, a spline portion 95 is formed at the 2 nd shaft 86. The speed switching ring 96 is provided on the spline portion 95 so as to be integrally rotatable and axially movable. The speed switching ring 96 has a plurality of through holes 97 and 97 … … through which the connecting pins 94 provided on the 1 st driven gear 92 and the 2 nd driven gear 93 can vertically pass. The connecting pin 94 of the 1 st driven gear 92 is inserted into the through hole 97 at an upper position of the speed switching ring 96. Accordingly, the rotation of the 1 st driven gear 92 is transmitted to the 2 nd shaft 86 through the speed switching ring 96 in the high speed mode. At a lower position of the speed switching ring 96, the coupling pin 94 of the 2 nd driven gear 93 is inserted through the through hole 97. Accordingly, the rotation of the 2 nd driven gear 93 is transmitted to the 2 nd shaft 86 through the speed switching ring 96 in the low speed mode.

As shown in fig. 14, the vertical position of the speed switching ring 96 can be changed by a switching lever 98 provided on the right side surface of the speed reducer section casing 3. The switching lever 98 is provided to be rotatable toward the reduction part housing 3. The switching lever 98 is provided with an eccentric pin 99 protruding into the speed reducer section housing 3 at a position eccentric from the rotation center. Between the switching lever 98 and the 2 nd shaft 86, a guide pin 100 is vertically stretched in the reduction part housing 3. The guide pin 100 penetrates upper and lower ends of the conversion plate 101 having an inverted U shape in a side view. The switching plate 101 can slide in the up-down direction along the guide pin 100. The changeover plate 101 has a slit 102, and the length of the slit 102 corresponds to the amount of movement of the eccentric pin 99 in the left-right direction accompanying the rotation of the switching lever 98. The eccentric pin 99 penetrates the slit 102. Accordingly, when the switching lever 98 is rotated, the switching plate 101 is moved up and down in accordance with the movement of the eccentric pin 99.

Inside the changeover plate 101, a pair of coil springs 103, 103 are externally fitted to the guide pin 100. A shift ring 104 penetrating the guide pin 100 is interposed between the coil springs 103, 103. The shift ring 104 engages with an annular groove 105 provided on the outer periphery of the speed shift ring 96. Accordingly, when the switching plate 101 moves up and down, the switching ring 104 held between the coil springs 103 and 103 moves up and down following the movement, and the speed switching ring 96 moves up and down. In this way, the high-speed mode and the low-speed mode can be switched by changing the vertical position of the speed switching ring 96 by the rotational operation of the switching lever 98. Fig. 13 and 14 show the low speed mode in which the speed switching ring 96 descends to connect with the 2 nd driven gear 93. Fig. 15 shows a high-speed mode in which the speed switching ring 96 ascends to connect with the 1 st driven gear 92.

An intermediate gear 106 is provided at a lower portion of the 2 nd shaft 86 so as to be integrally rotatable. An output gear 107 that meshes with the intermediate gear 106 is provided in a lower portion of the main shaft 8 so as to be integrally rotatable.

In the speed reduction unit 7, the rotation of the rotating shaft 25 of the motor 4 is transmitted to the 1 st shaft 85 at a reduced speed through the input gear 89. The rotation of the 1 st shaft 85 is transmitted to the 2 nd shaft 86 at a reduced speed in either a high speed or a low speed mode through the 1 st drive gear portion 90 and the 1 st driven gear 92, or the 2 nd drive gear portion 91 and the 2 nd driven gear 93. The rotation of the 2 nd shaft 86 is transmitted to the main shaft 8 through the intermediate gear 106 and the output gear 107.

The lower end of the main shaft 8 penetrates the speed reducer section casing 3 and protrudes downward. A shaft holding portion 108 capable of being screwed to the upper end of the stirring shaft 9 is provided at the lower end of the main shaft 8.

With the above configuration, in the mixer 1 to which the battery pack 12 is attached, the operator grips the left handle 68 and the right handle 69 provided on the operation handle 6. Accordingly, the mixer 1 is supported in a posture in which the mixer shaft 9 protrudes downward. This posture becomes a normal work posture. Further, depending on the height of the operator, the mixer shaft 9 may not necessarily be directed straight downward, and for example, it is also conceivable that the mixer shaft 9 is tilted backward (upper portion is rearward and lower portion is forward). The vertical direction in this case is the extending direction of the stirring shaft 9.

When the worker presses a trigger 71 provided on the right grip 69, the switch 70 is turned on. Then, the microcomputer of the control circuit board 46 that obtains the on signal of the switch 70 obtains the rotational position of the rotor 21 from the detection signal obtained by the sensor circuit board 24 of the motor 4, and by switching 6 switching elements (MOSFET, IGBT, etc.) on and off, three-phase current is supplied to the stator 20, and the coil 23 is sequentially energized, thereby rotating the rotor 21. When the rotary shaft 25 rotates together with the rotor 21, the rotation of the rotary shaft 25 is decelerated by the deceleration portion 7 in any one of the high-speed mode and the low-speed mode selected by the switching lever 98 and transmitted to the main shaft 8. Accordingly, the stirring shaft 9 connected to the shaft holding portion 108 rotates integrally with the main shaft 8. The blades 10 rotate together with the stirring shaft 9, thereby enabling stirring of the paint or the like.

Here, since the button cover 73 (lock button 72) and the adjustment dial 75 are provided, it becomes very easy to use. That is, by the operation of the lock button 72, the rotation of the motor 4 can be maintained without operating the trigger 71. After that, when the operator desires to change the rotation of the motor 4 according to the viscosity of the paint or the like, the operator only needs to operate the adjustment dial 75. Further, when the work is finished, the rotation of the motor 4 can be stopped by operating the lock button 72, which is convenient.

During operation, the operator who holds the left and right grips 68, 69 and supports the mixer 1 can visually recognize the blade 10 and the mixer shaft 9 at the lower end, the mixer material, and the like from above the motor housing 2 and the battery cover 13. At this time, since the mounting portion 60 of the operation lever 6 is not located in front of the motor housing 2 and the battery cover 13, the view is not blocked by the mounting portion 60. Accordingly, the operator can reliably visually recognize the blade 10 and the like.

In addition, in the motor housing 2, the motor 4 is located at the same height as the controller 5. In addition, the outer intake ports 41 are also located at the same height as the outer exhaust ports 42. Accordingly, the vertical dimension of the motor housing 2 can be suppressed, and the operability of the mixer 1 can be improved.

When the rotary shaft 25 rotates, the fan 31 rotates. Then, outside air is sucked in from the left and right outside air inlets 41, 41 of the motor housing 2, and enters the motor housing 2. As indicated by the broken-line arrows in fig. 5 and 7, this air flow passes between the controller 5 and the ribs 40, 40 to come into contact with the housing 45 (heat dissipation portion 48). Then, the air flow rises and goes over the ribs 40, 40 to move rearward. Also, the air flow enters the inside of the inner case 17 from the inner air inlet 33 of the inner case 17. Subsequently, the air flow flows downward in the inner case 17 to cool the motor 4. After that, the air flow is discharged into the motor housing 2 from the front and rear inner air outlets 32, 32 of the inner housing 17. Then, the air flow is divided left and right and discharged to the outside through the left and right outer air outlets 42, 42 of the motor housing 2.

By this air flow, the controller 5 is cooled on the upstream side, and the motor 4 is cooled on the downstream side. Since the controller 5 and the motor 4 are separated by the rib 40 and the ridge 34, even if the outer air inlet 41 and the outer air outlet 42 have the same height, the controller 5 and the motor 4 can be sequentially cooled without simplifying the path (shortcut).

The blender 1 of the above-mentioned mode comprises a motor 4 and a motor housing 2, wherein the motor 4 is provided with a stator 20 and a rotor 21; the motor housing 2 is configured to receive a motor 4. In addition, the mixer 1 includes a speed reduction part 7 and a speed reduction part housing 3, wherein, the speed reduction part 7 is driven by a rotor 21; the speed reducer section case 3 is disposed below the motor case 2 and accommodates the speed reducer section 7. The mixer 1 includes a shaft holding portion 108 and a controller 5 (control portion), wherein the shaft holding portion 108 protrudes downward from a lower portion of the reduction portion casing 3 and can hold the stirring shaft 9; the controller 5 is used for controlling the motor 4. Also, the controller 5 is configured to be at the same height as the motor 4 in the up-down direction.

With this configuration, the motor housing 2 can be formed to be short in the vertical direction, and the size in the vertical direction can be made compact.

In this configuration, in principle, the height of at least a part of the controller 5 may be the same as the height of at least a part of the motor 4 in the vertical direction, and for example, the controller 5 may be disposed on the upper side, the motor 4 may be disposed on the lower side, and the lower end of the controller 5 may be disposed at the same height as the upper end of the motor 4. Naturally, on the contrary, the upper end of the controller 5 and the lower end of the motor 4 may be arranged at the same height. As described above, when the mixer 1 is in the backward tilted posture or the like, the same height in the vertical direction corresponds to the same front-rear position in the extending direction of the mixer shaft 9.

The rotor 21 has a rotating shaft 25, and the motor 4 is accommodated in the motor housing 2 in a posture in which the rotating shaft 25 extends in the vertical direction. Accordingly, the motor housing 2 can also be formed short in the front-rear and right-left directions.

The controller 5 is housed in the motor housing 2 in a posture extending in the vertical direction. Accordingly, even if the controller 5 is disposed at the same height as the motor 4, space can be saved in the horizontal direction. In addition, since the air flow can be brought into contact with the controller 5 for a long time, the cooling effect can be improved.

The size of the controller 5 is controlled within the size in the up-down direction of the rotary shaft 25 in the up-down direction. Accordingly, the size of the motor housing 2 in the vertical direction is not increased by the controller 5.

The rotor 21 has a fan 31 that is integrally rotatable, and the motor case 2 has an outer air inlet 41 (air inlet) and an outer air outlet 42 (air outlet), wherein the outer air inlet 41 is for sucking air by rotation of the fan 31; the outer exhaust port 42 is for exhausting air. Also, the outer intake port 41 and the outer exhaust port 42 are configured to be the same in height in the up-down direction.

Accordingly, the motor housing 2 can be formed shorter in the vertical direction than in the case where the outer intake port 41 and the outer exhaust port 42 are disposed apart from each other in the vertical direction. Therefore, the dimension in the vertical direction can be made compact.

The controller 5 is disposed at a position where the air flow from the outer intake port 41 to the outer exhaust port 42 contacts (passes through). Accordingly, even if the outer intake port 41 and the outer exhaust port 42 are arranged to have the same height in the vertical direction, the controller 5 can be cooled.

The motor 4 is disposed on the downstream side of the air flow, and the controller 5 is disposed on the upstream side of the air flow. Accordingly, the motor 4 and the controller 5 can be efficiently cooled.

The motor 4 and the controller 5 are separated by a rib 40 for forming an air flow. Accordingly, even if the outer intake port 41 and the outer exhaust port 42 are arranged at the same height in the vertical direction, the motor 4 and the controller 5 can be reliably cooled.

The blender 1 of the above-mentioned mode comprises a motor 4 and a motor housing 2, wherein the motor 4 is provided with a stator 20 and a rotor 21; the motor housing 2 is configured to receive a motor 4. In addition, the mixer 1 includes a speed reduction part 7 and a speed reduction part housing 3, wherein, the speed reduction part 7 is driven by a rotor 21; the speed reducer section case 3 is disposed below the motor case 2 and accommodates the speed reducer section 7. The mixer 1 further includes a shaft holding portion 108, and the shaft holding portion 108 is projected downward from a lower portion of the speed reducer section casing 3, is driven by the speed reducer section 7, and can hold the mixer shaft 9. The mixer 1 further includes an operation handle 6, and the operation handle 6 includes a metal attachment portion 60 attached to the motor housing 2, and a pair of left and right grips 68, 69 (gripping portions) connected to left and right sides of the attachment portion 60. In the mixer 1, the operation lever 6 is not located on the front side (on a parallel projection plane facing forward) of the motor housing 2.

With this configuration, the central mounting portion 60 does not protrude toward the front side of the motor housing 2. This ensures visibility for the operator, and facilitates observation of the blade 10 and the like from above.

Further, the motor housing 2 does not need to be inserted into the mounting portion 60 and mounted. Accordingly, the operation handle 6 can be easily assembled.

The mounting portion 60 has a U-shape in plan view. This makes it possible to easily attach the motor housing 2.

The foremost surface 2c (front surface) of the motor housing 2 does not protrude forward beyond the front ends of the pair of coupling portions 61, 61 (the front end of the operation lever 6). Accordingly, the motor housing 2 can be disposed at a position not obstructing the view of the operator, and visibility can be improved.

The foremost surface 2c of the motor housing 2 has a planar shape defined in the vertical and horizontal directions. Accordingly, the motor housing 2 is shaped so as not to obstruct the view of the operator, and visibility is improved.

The attachment portion 60 is integrally formed with a pair of connection portions 61, 61 (arms) each composed of a front arm 67A and a rear arm 67B (arms) made of metal extending in the left-right direction on the left and right sides thereof, and the respective grip portions are a left grip 68 and a right grip 69 extending between the end portions of the front arm 67A and the rear arm 67B of the connection portions 61. Thus, the operation handle 6 can be easily held.

The left handle 68 and the right handle 69 are divided into upper and lower 2 split portions 68a, 68B and left and right 2 split portions 69a, 69B with a front-rear direction, which is a direction extending between the ends of the front arm 67A and the rear arm 67B, being a dividing plane. The front and rear ends of the split portions 68a, 68B and the split portions 69a, 69B are screwed to the ends of the front arm 67A and the rear arm 67B. Accordingly, the left handle 68 and the right handle 69 can be easily assembled.

The mounting portion 60 is a plate shape having thin walls at the upper and lower sides. This can reduce the weight of the operation handle 6. A support projection 63 (support portion) is integrally formed on the outer surface of the motor housing 2, the support projection 63 supports the mounting portion 60 from below, and the mounting portion 60 is screwed to the support projection 63 from above. This makes it possible to easily attach the motor housing 2.

The rear end of the mounting portion 60 is located rearward of the rear surface of the motor housing 2. Accordingly, the motor housing 2 and the battery cover 13 do not touch the operator.

A battery mounting portion 11 is provided on the upper portion of the motor housing 2, and the battery pack 12 can be mounted on the battery mounting portion 11. This makes it possible to easily attach and detach the battery pack 12.

A battery cover 13 is provided on the motor housing 2 to be able to open and close the battery mounting portion 11, and the battery cover 13 covers the battery pack 12 mounted on the battery mounting portion 11 from above. This protects the battery mounting portion 11 and the battery pack 12.

The foremost surface 13a (front surface) of the battery cover 13 has a planar shape defined in the up-down and left-right directions. Accordingly, the battery cover 13 is formed into a shape that does not obstruct the view of the operator even when installed.

The agitator 1 of the above-described mode includes a motor 4, a speed reduction unit 7, a motor housing 2, and a speed reduction unit housing 3 (housing), wherein the speed reduction unit 7 is driven by the motor 4; the motor housing 2 and the speed reducer housing 3 accommodate the motor 4 and the speed reducer 7. The mixer 1 further includes a shaft holding portion 108, and the shaft holding portion 108 is driven by the speed reducer portion 7 and protrudes from a lower portion of the speed reducer portion casing 3. The mixer 1 includes a mounting portion 60, connecting portions 61 and 61 (sheet metal members), a right handle 69, and a left handle 68, wherein the mounting portion 60 and the connecting portions 61 and 61 are fixed to the motor housing 2 and extend in the left-right direction; the right handle 69 is provided at the right end of the connecting portion 61 and extends in the front-rear direction; the left handle 68 is provided at the left end of the connecting portion 61, and extends in the front-rear direction. The front portion of the motor housing 2 does not overlap the mounting portion 60 in a plan view.

With this configuration, the central mounting portion 60 does not protrude toward the front side of the motor housing 2. This ensures visibility for the operator, and facilitates observation of the blade 10 and the like from above.

Next, a modified example will be described.

In the invention in which the controller is configured to be the same height as the motor, the position of the controller in the horizontal direction is not limited to the front of the motor. The height of the motor may be the same as the height of the motor, and the motor may be either the rear side or the left or right side of the motor. The orientation of the controller is not limited to the orientation extending in the vertical direction, and may be a horizontal orientation extending in the front-rear-left-right direction or an inclined posture. Even in the case of a controller including a plurality of substrates, the substrates may be arranged at the same height. If the motor housing can be made compact, the controller may not be within the vertical dimension of the rotating shaft.

The rotation shaft of the motor is not limited to a vertical posture extending in the vertical direction. The rotation axis may be oriented in a lateral direction extending in the front-rear direction and the left-right direction.

The number and shape of the intake ports and the exhaust ports are not limited to the above. It is also possible to arrange both the intake port and the exhaust port at the same height. Conversely, the air inlet and the air outlet may be disposed at a distance from each other.

In the invention in which the controller is disposed in the vertical direction in the motor case, the position of the controller is not limited to the front of the motor. The motor can be arranged at the rear part or the left side or the right side of the motor. Even in the case of a controller including a plurality of substrates, each substrate may be arranged in the vertical direction in the same manner. The rotation shaft of the motor is not limited to a vertical posture extending in the vertical direction. The number and arrangement of the intake ports and the exhaust ports are not limited to the above.

In the invention in which the intake port and the exhaust port are arranged at the same height, the number and shape of the intake port and the exhaust port are not limited to the above. It is also possible to arrange both the intake port and the exhaust port at the same height. Conversely, a part of the intake port and the exhaust port may be arranged at the same height as each other. The air inlet and the air outlet may be arranged away from each other in the circumferential direction of the motor housing.

In the invention relating to the operation handle, the shape of the attachment portion is not limited to the U-shape. The motor housing may be formed in an inverted C shape with the center of the distal end cut open and the front side of the motor housing opened.

The motor housing may be fixed to the lower surface of the support portion without being placed on the upper surface of the support portion. The mounting portion may be mounted to a groove formed in the outer periphery of the motor housing without providing the support portion.

The mounting portion may be a rod-shaped body or a band-shaped body having a radially thin wall, instead of having a vertically thin wall.

The shape of the grip portion is not limited to the above-described embodiment. The handle may be formed without forming a split surface in the front-rear direction, or may be formed as an integral rod or cylinder without forming the handle in a half-open shape.

The connecting portion may also form the arm separately from the mounting portion and connect it with the mounting portion. Instead of providing the arms in the front and rear direction, the handle may be provided so as to have 1 arm. The handle may be directly attached to the attachment portion without the attachment portion.

As long as the shape of the mounting portion can secure a visual field, the front surfaces of the motor case and the battery cover may not be flat. The battery cover may also be omitted.

In addition, in each invention, the motor is not limited to the brushless motor. The inner housing may be omitted from the motor housing. In this case, the intake port and the exhaust port are provided only to the motor housing. The motor may be disposed upstream of the air flow, and the controller may be disposed downstream of the air flow.

The number of shafts and gears may be increased or decreased in the configuration of the speed reduction unit. The arrangement of the shafts may be changed as appropriate. The speed change mechanism may be omitted. The position of the spindle may also be changed.

The position of the battery mounting portion is not limited to the upper portion of the motor housing. Or on the side or rear surface of the motor housing.

The power source is not limited to a battery. The technique of the present invention is also applicable to a configuration in which power is supplied to the motor through a power line of a commercial power supply (AC).

The length of the stirring shaft, the structure of attachment to the main shaft, and the shape of the blades are not limited to the above-described embodiments.