JP2019098486A - Cutting machine - Google Patents

Abstract

To provide a stationary type or desk type cutting machine which enables shortening of a wiring distance between a controller and an electric motor and can achieve downsizing of a handle housing.SOLUTION: A stationary type or desk type cutting machine 1 can cut a cut material by rotating a rotary cutting tool. The cutting machine 1 includes: an electric motor 30 which drives so as to generate rotary force in the rotary cutting tool; a motor housing 20 housing the electric motor 30; and a controller 70 which controls driving of the electric motor 30. The controller 70 is housed in spaces 20e, 20f provided between an outer periphery 30a of the electric motor 30 and an inner periphery 20c of the motor housing 20.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a stationary or bench type cutting machine, and more particularly to a stationary or bench type cutting machine which rotates a rotary blade to cut a material to be cut.

  Conventionally, there is a stationary type metalworking cutting machine (generally called "cutting machine" in the market) as an electric tool for cutting a material to be cut such as a metal pipe, which is in a state where the product itself is placed on the floor The material to be cut on the base is a cut product by rocking the disk-shaped cutting stone or the circular saw blade downward. In addition, as a power tool for cutting wood, there is a woodworking tabletop cutting machine (there is a so-called "table-top marnoco" in the market and a so-called "slide marnoco"), which is the product itself on the table or floor It is a product which cuts the material to be cut on the base by rocking the circular saw blade downward in the state of being placed on the base. Although there is no clear definition between “stationary cutting machine” and “table-top cutting machine”, “stationary or table-top type” is used as an expression including at least the above-mentioned product group. The term "cutting machine" is used. Here, in the following Patent Document 1, a stationary type in which a rotational force is generated by an electric motor 130 in a cutting grindstone 103a for cutting a material to be cut (not shown) and a drive of the electric motor 130 is controlled by a controller 170. A cutting machine 101 is disclosed (see FIGS. 9-10). Thus, since the rotation of the cutting grindstone 103a can be controlled, the cutting grindstone 103a can be controlled to a rotation state suitable for cutting the material to be cut.

JP, 2016-172302, A

  However, in the technique of Patent Document 1 described above, the controller 170 is accommodated in the handle housing 122 which is partially enlarged (see FIG. 10). Therefore, since the controller 170 and the electric motor 130 are separated, the wiring distance between the controller 170 and the electric motor 130 may be long. Moreover, since it is necessary to ensure the space which accommodates the controller 170 in the handle housing 122, the handle housing 122 might enlarge.

  The present invention is intended to solve such problems, and an object thereof is to provide a stationary or tabletop cutting machine capable of shortening the wiring distance between the controller and the electric motor and further miniaturizing the handle housing. It is to be.

The present invention is for achieving the above-mentioned object, and is configured as follows.
The invention according to claim 1 is a stationary or bench type cutting machine which rotates a rotary blade to cut a material to be cut. The cutting machine includes an electric motor which is driven to generate rotational force in the rotary blade, a motor housing which accommodates the electric motor, and a controller which controls driving of the electric motor. The controller is accommodated in a space provided between the outer periphery of the electric motor and the inner periphery of the motor housing.

  According to the invention of claim 1, therefore, the controller and the electric motor do not separate from each other, and therefore, the wiring distance between the controller and the electric motor does not become long. Therefore, the wiring distance between the controller and the electric motor can be shortened. Further, since it is not necessary to secure a space for housing the controller in the handle housing, the handle housing does not increase in size. Therefore, the handle housing can be miniaturized.

  The invention according to claim 2 is the stationary or bench type cutting machine according to claim 1, wherein in the space, the remaining space excluding the space for accommodating the controller is an electric motor and An electrical component connecting the controller is accommodated.

  According to the invention of claim 2, there is no need to separately secure a space for housing the electric component. Therefore, the enlargement of the cutting machine can be suppressed.

  The invention according to claim 3 is the stationary or table-top type cutting machine according to any one of claims 1 to 2, wherein the motor housing is an integrally formed bottomed container type. ing. The electric motor and the controller are attachable to and removable from the inside of the motor housing from the opening side formed on the opposite side of the bottom.

  According to the invention of claim 3, since the motor housing is not structured to be joined by the half housing, the assembly of the brushless motor and the controller to the motor housing can be easily implemented. Therefore, the assemblability of the cutting machine can be improved.

  The invention according to claim 4 is the stationary or bench type cutting machine according to any one of claims 1 to 3, wherein a centrifugal fan capable of cooling the electric motor on the rotation shaft of the electric motor is provided. Is assembled. A fan guide is provided around the centrifugal fan. The controller is provided such that a portion thereof overlaps the fan guide in the radial direction of the electric motor.

  According to the invention of claim 4, the cutting machine can be miniaturized in the radial direction of the electric motor.

  The invention according to claim 5 is the stationary or bench type cutting machine according to claim 4, wherein the centrifugal fan can also cool the controller.

  According to the invention of claim 5, the controller can be cooled together with the electric motor. Therefore, the controller can also be cooled without requiring a separate fan for cooling the controller. As a result, the controller can be cooled efficiently.

It is the perspective view which looked at the stationary-type cutting machine at the time of use (top dead center) from the left side. It is the side view which looked at the stationary cutting machine of FIG. 1 from the right side. It is the perspective view which looked at the stationary-type cutting machine at the time of storage (bottom dead center) from the right side. It is the side view which looked at the stationary-type cutting machine of FIG. 3 from the left side. It is a rear view of the stationary cutting machine of FIG. It is a top view of the stationary cutting machine of FIG. It is a longitudinal cross-sectional view of the stationary cutting machine of FIG. FIG. 4 is an enlarged view of the interior of the motor housing of the stationary cutting machine of FIG. 3; It is the side view which looked at the stationary cutting machine which concerns on a prior art from the left side. It is a longitudinal cross-sectional view of the principal part of the stationary cutting machine of FIG.

  Hereinafter, modes for carrying out the present invention will be described with reference to FIGS. In the following description, as examples of the "rotary blade," "stationary or bench type cutting machine," and "electric motor," "cutting stone 3a", "stationary cutting machine 1 (hereinafter," cutting machine 1 "" And "the brushless motor 30" will be described. Also, in the following description, upper, lower, front, rear, left, right are the directions of upper, lower, front, rear, left, right, that is, the cutting machine 1 described in the above-mentioned drawings. The direction is in accordance with the use situation of the worker. In addition, the front side in this cutting machine 1 is prescribed | regulated by the side in which the operator who uses the cutting machine 1 exists.

  The cutting machine 1 is composed of a base 2 and a cutting machine main body 3 having a cutting wheel 3a which is pivotable with respect to the base 2 and is rotated by driving a brushless motor 30 (see FIGS. 1 and 2). ). The base 2 and the cutting machine body 3 will be individually described below.

  First, the base 2 will be described (see FIGS. 1 to 4). The base 2 is formed of a rectangular base member on which a material to be cut (not shown) such as a metal pipe or grooved steel can be placed on a table surface 2a which is the upper surface thereof. A substantially L-shaped fence 10 including a base portion 10a and an abutting portion 10b capable of abutting on a material to be cut is assembled to the table surface 2a of the base 2 through an adjusting screw 12 and a lever 19 There is. A plate-like interposed member 24 is interposed between the table surface 2a and the base portion 10a. The interposing member 24 is fixed to the table surface 2 a of the base 2 by screwing the adjusting screw 12.

  Further, by screwing the lever 19, the base portion 10 a of the fence 10 is fixed to the interposed member 24. Therefore, the fence 10 can be assembled to the table surface 2 a of the base 2 by screwing the adjusting screw 12 and the lever 19. The fence 10 is rotatably assembled to the table surface 2a around the axis of the adjusting screw 12 through an arc-shaped long hole 10c formed in the base portion 10a. Thereby, in holding | maintenance of the to-be-cut material mentioned later, even if it holds diagonally, it becomes possible to respond. Therefore, the material to be cut can be cut diagonally.

  Further, a vice plate 11 is slidably mounted on the table surface 2 a of the base 2 in the front-rear direction. A feed screw 14 integral with the feed handle 13 is in mesh with the vice plate 11. Therefore, by rotating the feed handle 13, the front and back slide positions of the vice plate 11 can be fixed. Therefore, since the material to be cut can be sandwiched between the contact portion 10b of the fence 10 and the vice plate 11, the material to be cut placed on the table surface 2a can be held.

  Further, the table surface 2a of the base 2 is formed with a slit 15 in which the cutting grindstone 3a can be advanced and retracted. Further, on the rear side of the table surface 2 a of the base 2, a support connecting portion 16 for assembling a cutting machine main body 3 described later is provided. Further, a substantially U-shaped spark chute 17 is provided at the rear end of the table surface 2a of the base 2 to prevent the sparks from scattering when the cutting stone 3a cuts the material to be cut. The base 2 is configured in this manner.

  Next, the cutting machine main body 3 will be described (see FIGS. 1 to 7). The cutting machine main body 3 mainly includes a motor housing 20 accommodating the brushless motor 30, a gear housing 21 connected to the right side of the motor housing 20 and accommodating the second gear 47, and upper and front sides of the gear housing 21. And a handle housing 22 connected to straddle each other.

  The motor housing 20 is an integrally formed bottomed substantially cylindrical container, and an opening 20a is formed on the opposite side of the bottom 20b (see FIG. 8). The brushless motor 30 is composed of an inner rotor type having a rotor 31 and a stator 32. The stator 32 includes a stator core 33 formed of a plurality of laminated steel plates, insulating members provided before and after the stator core 33, and six coils wound around the stator core 33 via both the insulating members. It consists of 34 and.

  On the other hand, the rotor 31 is provided with a rotating shaft 35 positioned at the axial center, a cylindrical rotor core 36 provided around the rotating shaft 35, and an outer side of the rotor core 36. It comprises a permanent magnet (not shown) whose polarity is alternately changed in the direction, and a plurality of sensor permanent magnets (not shown) provided radially on the rear side of these. Also, at the rear end of this insulating member, a sensor circuit board (not shown) equipped with three rotation detection elements for detecting the position of the sensor permanent magnet of the rotor 31 and outputting a rotation detection signal is provided. .

  The rotating shaft 35 is rotatably supported by a bearing 37 held on the left side of the motor housing 20 and a bearing 38 held in the gear housing 21. In addition, a first gear 39 is formed at the tip of the rotary shaft 35, and the first gear 39 is in a state of entering the inside of the gear housing 21. The first gear 39 meshes with a second gear 47 fixed to an output shaft 44 rotatably supported by a bearing 45 held by the gear housing 21 and a bearing 46.

  The tip end of the output shaft 44 is in a state of projecting into the fixed cover 49 fixed to the gear housing 21, and the cutting grindstone 3 a is fixed to the projecting end by a bolt 48. The fixed cover 49 covers the upper side of the cutting wheel 3a, and the movable cover 50 rotatably assembled to the fixed cover 49 covers a part of the lower side of the cutting wheel 3a in a normal state. It is a cover that has been energized. In addition, a centrifugal fan 40 is fixed to the rotational shaft 35 at a position closer to the left than the bearing 38.

  A plurality of first air windows 42 and a plurality of second air windows 41 above the first air windows 42 are formed in the bottom portion 20 b of the motor housing 20. Further, on the right side of the stator 32, a dish-shaped fan guide 43 which penetrates the rotation shaft 35 and surrounds the periphery of the centrifugal fan 40 is provided. Further, a space 20 e partitioned at a rib 20 d is provided at the upper position between the outer periphery 30 a of the brushless motor 30 and the inner periphery 20 c of the motor housing 20. The controller 70 is assembled in the space 20e (see FIG. 8). That is, the controller 70 is accommodated in the motor housing 20.

  The controller 70 has a control processing device and a bridge circuit device (both not shown), and is for controlling the drive of the brushless motor 30. The control processing apparatus is configured to have a CPU and an appropriate storage medium (none of which is shown). The bridge circuit device is configured as a switching circuit for driving the brushless motor 30. Further, this control processing device performs control for driving the brushless motor 30, and also performs control of regenerative braking for braking the rotation of the rotary shaft 35. Further, this bridge circuit device is configured to have an FET as a switching element.

  That is, this control processing device is to drive and regeneratively brake the brushless motor 30 by controlling the bridge circuit device. Incidentally, this control processing device performs control processing based on the detection regarding the rotation of the rotor 31 by the sensor substrate (not shown). Further, a signal regarding battery information such as voltage and temperature of the rechargeable battery 62 is transmitted to the control processing device. Further, a signal regarding motor information such as the temperature of the brushless motor 30 is also transmitted to the control processing device.

  Further, the controller 70 is provided such that substantially the entire area of the controller 70 overlaps the fan guide 43 in the radial direction of the brushless motor 30 (see FIG. 7). The controller 70 is electrically connected to the brushless motor 30, two rechargeable batteries 62 described later, and an internal switch (not shown) described later via electrical components such as lead wires (not shown) and a capacitor 25. Connected. In the lower space 20f partitioned between the outer periphery 30a of the brushless motor 30 and the inner periphery 20c of the motor housing 20 via the rib 20d, electric components such as these lead wires and the capacitor 25 are accommodated. There is. The brushless motor 30 and the controller 70 can be attached to and removed from the inside of the motor housing 20 from the opening 20 a side of the motor housing 20.

  On the other hand, a first grip 51 is formed at a position closer to the front of the handle housing 22 so that the operator swings the cutting machine body 3 in the vertical direction. Further, a trigger 53 that can be pulled and operated while the operator's hand grips the first grip portion 51 is provided at a position closer to the front of the handle housing 22. When the trigger 53 is pulled, a predetermined signal (for example, a switch ON signal) is transmitted from an internal switch operating according to the pulling operation to a controller 70 described later.

  Further, a second grip portion 52 to be gripped in order for the operator to carry the cutting machine 1 is formed at a rearward position of the handle housing 22. When the operator carries the cutting machine 1, the lock pin 26 provided on the main body support 23 is slid leftward to fix the cutting machine 3 at the bottom dead center. The lock pin 26 is in the shape of a rod and is inserted into a left and right hole (not shown) provided on the rear of the main body support 23. In the state where the lock pin 26 is slid to the right, the cutting machine main body 3 can be freely swung up and down, but when it is slid to the left, it is completely slid because it has a positional relationship that interferes with the support connecting part 16 I can not However, in the state where the cutting machine main body 3 is at the bottom dead center, the main body support 23 passes a position above the upper end of the support connection 16, so that the lock pin 26 can be slid to the left. Thereafter, when the downward force on the cutting machine main body 3 is released, the cutting machine main body 3 rises upward (the lock pin 26 is lowered downward), and the lock pin 26 and the support connection portion 16 abut each other. The bottom dead center state is maintained.

  Further, behind the handle housing 22, a main body support 23 made of metal (for example, made of aluminum) is provided. A portion of a rectangular battery mounting base 60 made of synthetic resin is connected to the main body support portion 23. The battery mounting base 60 is connected to the side opposite to the side where sparks (not shown) are generated when the cutting stone 3 a in the main body support 23 cuts the material to be cut. When the battery mounting base 60 is connected in this manner, the main body support 23 shields the spark from the battery mounting base 60. Of course, the main body support 23 is set wide enough to shield the generated sparks. As a result, as described later, the two rechargeable batteries 62 mounted on the battery mounting base 60 can be shielded from sparks.

  The battery mounting base 60 is connected to the side of the main body support 23 opposite to the cutting stone 3 a so that the longitudinal direction of the battery mounting base 60 and the longitudinal direction of the handle housing 22 coincide with each other. The battery mounting base 60 is provided with two battery mounting portions 61 along the longitudinal direction. A rectangular parallelepiped rechargeable battery 62 long in one direction can be attached to each of the two battery attachment parts 61. The rechargeable battery 61 is mounted by moving in parallel with the longitudinal direction. The two rechargeable batteries 62 can be mounted such that the longitudinal direction of the rechargeable battery 62 is perpendicular to the longitudinal direction (front-rear direction) of the handle housing 22. Therefore, the mounting direction of the rechargeable battery 62 is also perpendicular to the longitudinal direction of the handle housing 22. Further, the battery mounting portion 60 is provided with a terminal for electrically connecting to the terminal of the rechargeable battery 62. The battery mounting base 60 is also partially connected to the handle housing 22, and electrically connected from the terminals to circuits in the handle housing 22 via leads.

  The mounting of the rechargeable battery 62 is a sliding mounting of the rechargeable battery 62 with respect to the battery mounting portion 61 from the left side to the right side. When the rechargeable battery 62 is attached to the battery attachment portion 61, the rechargeable battery 62 is locked to the battery attachment portion 61 via the engagement claws (not shown). There is. Therefore, when the lock release button 63 of the rechargeable battery 62 is pressed, the lock of the engagement claw is released, and the rechargeable battery 62 is slid from the right side to the left side from the battery attachment portion 61 and removed. be able to. The cutting machine body 3 is configured in this manner.

  The main body support portion 23 of the cutting machine main body 3 and the support connection portion 16 of the base 2 configured as described above are rotatably (swayably) assembled via the support shaft 18. Thereby, the cutting machine main body 3 can be rocked with respect to the base 2. At this time, a spring (for example, a torsion spring not shown) is held between the main body support 23 and the support connection 16. Thereby, the cutter main body 3 can be held at the top dead center with respect to the base 2 in a normal state (see FIGS. 1 and 2). The cutting machine 1 is configured in this manner.

  Subsequently, the operation of the cutting machine 1 configured as described above will be described. When the operator's hand pulls the trigger 53 of the handle housing 22, a predetermined signal is transmitted from the internal switch to the controller 70. Then, power is supplied to the brushless motor 30 from the two rechargeable batteries 62, and the rotating shaft 35 is driven (rotated). As a result, the power is transmitted to the output shaft 44 through the first gear 39 and the second gear 47, so that the cutting grindstone 3a is rotated by this transmission. Therefore, when the cutting machine body 3 is swung downward, the workpiece held on the table surface 2 a of the base 2 can be cut. At this time, the lower side of the cutting grindstone 3 a is in a state of entering into the slit 15 of the table surface 2 a of the base 2.

  At this time, the centrifugal fan 40 also rotates with the rotary shaft 35 to be driven, so the air sucked from the first air window 42 of the motor housing 20 passes through the inside of the brushless motor 30 to cool the brushless motor 30. After that, it is fed to the gear housing 21 by the fan guide 43. Since the brushless motor 30 is thus cooled, this air is referred to as "first cooling air W1." The first air window 42 and the brushless motor 30 are in an adjacent positional relationship (see FIG. 7). Therefore, the brushless motor 30 can be cooled immediately by the air (cold outside air) just sucked from the first air window 42. Therefore, the cooling efficiency can be enhanced.

  At this time, air is also drawn from the second air window 41 of the motor housing 20 by the negative pressure generated by the centrifugal fan 40. The sucked air passes through the inside of the controller 70 to cool the control processing device and the bridge circuit device, and then joins on the left side (upstream side) of the centrifugal fan 40, and the combined wind is the gear housing by the fan guide 43. Sent to 21 Since the controller 70 is thus cooled, this air is referred to as "second cooling air W2". This description corresponds to "the centrifugal fan is also capable of cooling the controller" described in the claims. The second air window 41 and the controller 70 are in an adjacent positional relationship (see FIG. 7). Therefore, the controller 70 can be immediately cooled by the air (cold outside air) just sucked from the second air window 41. Therefore, the cooling efficiency can be enhanced.

  Further, most of the first cooling air W1 and the second cooling air W2 sent to the gear housing 21 are blown out into the fixed cover 49. Then, most of the first cooling air W1 and the second cooling air W2 blown out merge with an air flow (not shown) generated as the cutting wheel 3a rotates and are formed on the right side of the fixed cover 49. It is discharged from the exhaust port (not shown).

  The cutting machine 1 according to the embodiment of the present invention is configured as described above. According to this configuration, at the upper position between the outer periphery 30a of the brushless motor 30 and the inner periphery 20c of the motor housing 20, a space 20e partitioned via the rib 20d is provided. The controller 70 is assembled in the space 20 e. That is, the controller 70 is accommodated in the motor housing 20. Therefore, since the controller 70 and the brushless motor 30 do not separate from each other, the wiring distance between the controller 70 and the brushless motor 30 does not increase. Therefore, the wiring distance between the controller 70 and the brushless motor 30 can be shortened. Further, since it is not necessary to secure a space for housing the controller 70 in the handle housing 22, the handle housing 22 will not be upsized. Therefore, the handle housing 22 can be miniaturized.

  Further, according to this configuration, in the lower space 20f partitioned via the rib 20d between the outer periphery 30a of the brushless motor 30 and the inner periphery 20c of the motor housing 20, the electric wires such as the lead wire and the capacitor 25 are electrically Parts are housed. Therefore, it is not necessary to separately secure a space for housing the electrical component. Therefore, the enlargement of the cutting machine 1 can be suppressed.

  Further, according to this configuration, the motor housing 20 is a substantially cylindrical container of the integrally formed bottom portion 20b, and an opening 20a is formed on the opposite side of the bottom portion 20b. The brushless motor 30 and the controller 70 can be attached to and removed from the inside of the motor housing 20 from the opening 20 a side of the motor housing 20. With such a configuration, the motor housing 20 is not joined by the half housing, so that the assembly of the brushless motor 30 and the controller 70 with respect to the motor housing 20 can be easily performed. Therefore, the assemblability of the cutting machine 1 can be improved.

  Further, according to this configuration, the controller 70 is provided so that a part thereof overlaps the fan guide 43 in the radial direction of the brushless motor 30. Therefore, the cutting machine 1 can be miniaturized in the radial direction of the brushless motor 30.

  Further, according to this configuration, since the centrifugal fan 40 also rotates with the rotation shaft 35 of the brushless motor 30, the air sucked from the first air window 42 of the motor housing 20 passes through the inside of the brushless motor 30 and the brushless motor After cooling 30, it is sent to the gear housing 21 by the fan guide 43. At this time, air sucked from the first air window 42 of the motor housing 20 passes through the inside of the controller 70 to cool the control processing device and the bridge circuit device, and is then sent to the gear housing 21 by the fan guide 43. Therefore, the controller 70 can be cooled together with the brushless motor 30. Therefore, the controller 70 can also be cooled without requiring a separate fan for cooling the controller 70. As a result, the controller 70 can be cooled efficiently. The cooling of the controller 70 can also achieve a certain cooling effect even if air after cooling the brushless motor 30 is applied to the controller 70.

  The above-described content relates to only one embodiment of the present invention, and does not mean that the present invention is limited to the above-described content.

  In the embodiment, "cutting stone 3a", "stationary cutting machine 1" and "brushless motor 30" are described as examples of "rotary blade tool", "stationary or bench type cutting machine" and "electric motor". . That is, the "stationary cutting machine 1" has been described. However, the present invention is not limited to this, and may be "tabletop marnoco", "slide marnoco", "table saw" or the like. Also, the "rotating blade" may be a "tip saw".

  Further, in the embodiment, an example in which the shape of the motor housing 20 is substantially cylindrical has been described. However, the shape of the motor housing 20 is not limited to this, and the shape of the motor housing 20 may be a substantially square cylinder, a substantially oval cylinder, or the like. Although the substantially cylindrical portion and the bottom portion 20b are illustrated as being integrally formed, they may be separate parts and may be coupled by screws or the like.

  Moreover, in the embodiment, the controller 70 is accommodated in the space 20e, and another electrical component is accommodated in the space 20f. However, the present invention is not limited to this, and conversely, the controller 70 may be accommodated in the space 20f and other electrical components may be accommodated in the space 20e. Further, in the embodiment, two rechargeable batteries 62 are shown, but one or three or more rechargeable batteries may be used.

1 Cutting machine (stationary cutting machine)
2 base 2a table surface 3 cutting machine body 3a cutting stone (rotary blade)
DESCRIPTION OF SYMBOLS 10 fence 10a base part 10b contact part 10c long hole 11 vice plate 13 handle 14 feed screw 15 slit 16 support connection part 17 spark chute 18 spindle 20 lever 20 motor housing 20a opening 20b bottom 20c inner periphery 20d rib 20e space 20f space 20f space Reference Signs List 21 gear housing 22 handle housing 23 main body support portion 24 interposing member 25 capacitor 26 lock pin 30 brushless motor (electric motor)
30a outer periphery 31 rotor 32 stator 33 stator core 34 coil 35 rotating shaft 36 rotor core 37 bearing 38 bearing 39 first gear 40 centrifugal fan 41 second air window 42 first air window 43 fan guide 44 output shaft 45 bearing 46 bearing 47 2 gear 48 bolt 49 fixed cover 50 movable cover 51 first grip section 52 second grip section 53 trigger 60 battery mounting base 61 battery mounting section 62 rechargeable battery 63 lock release button 70 controller W1 first cooling air W2 second cooling air

Claims (5)

A stationary or bench type cutting machine which rotates a rotary blade to cut a material to be cut, comprising:
An electric motor driven to generate a rotational force in the rotary blade;
A motor housing for housing the electric motor;
A controller for controlling driving of the electric motor;
The controller is a stationary or tabletop cutting machine housed in a space provided between the outer periphery of the electric motor and the inner periphery of the motor housing. A stationary or tabletop cutting machine according to claim 1, wherein
A stationary or bench type cutting machine in which an electrical component connecting the electric motor and the controller is accommodated in the remaining space excluding the space accommodating the controller among the spaces. A stationary or bench type cutting machine according to any one of claims 1 to 2, wherein
The motor housing is an integrally formed bottomed container type,
The stationary or tabletop cutting machine, wherein the electric motor and the controller are attachable to and removable from the inside of the motor housing from an opening side formed on the opposite side of the bottom. A stationary or bench type cutting machine according to any one of claims 1 to 3, wherein
A centrifugal fan capable of cooling the electric motor is attached to the rotary shaft of the electric motor,
A fan guide is provided around the centrifugal fan.
The stationary or tabletop cutting machine, wherein the controller is provided so as to partially overlap the fan guide in the radial direction of the electric motor. A stationary or tabletop cutting machine according to claim 4, wherein
The centrifugal fan is a stationary or table-top type cutting machine which is also capable of cooling the controller.

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