WO2023188153A1 - Cutting machine - Google Patents

Cutting machine Download PDF

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Publication number
WO2023188153A1
WO2023188153A1 PCT/JP2022/016125 JP2022016125W WO2023188153A1 WO 2023188153 A1 WO2023188153 A1 WO 2023188153A1 JP 2022016125 W JP2022016125 W JP 2022016125W WO 2023188153 A1 WO2023188153 A1 WO 2023188153A1
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WO
WIPO (PCT)
Prior art keywords
motor
cutting machine
blade
tank
machine according
Prior art date
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PCT/JP2022/016125
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French (fr)
Japanese (ja)
Inventor
壮二 鹿島
Original Assignee
本田技研工業株式会社
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Publication date
Application filed by 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to PCT/JP2022/016125 priority Critical patent/WO2023188153A1/en
Publication of WO2023188153A1 publication Critical patent/WO2023188153A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts

Definitions

  • the present invention relates to a cutting machine.
  • Patent Document 1 discloses a concrete cutter in which a rotary blade is rotated by the power of an engine.
  • an object of the present invention is to provide a technology that can efficiently cool a motor mounted on a cutting machine.
  • a cutting machine is a cutting machine that cuts a structure by pressing a disc-shaped blade against the structure while rotating, and has wheels. , comprising a body that rotatably supports the blade, a tank that stores water supplied to the blade to cool the blade, and a motor that rotationally drives the blade, and the water is stored in the tank.
  • the motor is characterized in that the motor is cooled using the water.
  • a diagram showing an example of the configuration of a cutting machine according to the present invention A block diagram schematically showing a cutting machine according to the present invention
  • a block diagram schematically showing a cutting machine according to the present invention A block diagram schematically showing a cutting machine according to the present invention
  • a block diagram schematically showing a cutting machine according to the present invention A block diagram schematically showing another embodiment of the cutting machine according to the present invention
  • arrows X, Y, and Z indicate directions perpendicular to each other, where the X direction is the front-rear direction of the cutting machine 10, the Y direction is the left-right direction (width direction) of the cutting machine 10, and the Z direction is the cutting direction.
  • the vertical direction of the machine 10 is shown respectively.
  • the +X direction indicates the direction of movement of the cutting machine 10, and with respect to the direction of movement
  • the +Y direction indicates the left direction (the left side of the cutting machine 10)
  • the -Y direction indicates the right direction (the left side of the cutting machine 10). 10) is shown.
  • FIG. 1 shows an example of the configuration of a cutting machine 10 according to this embodiment.
  • the cutting machine 10 is a working machine that cuts a structure by rotating and pressing a disc-shaped blade 11a against the structure, and is sometimes called a cutter.
  • the cutting machine 10 of this embodiment includes a working part 11, a motor 12, a battery 13, a power control part 14, a power transmission mechanism 15, a tank 16, a machine body 17 (base), and a pair of left and right wheels. 18 and a handle portion 19.
  • Examples of structures to be cut by the cutting machine 10 of this embodiment include road surfaces, floors, and floor slabs made of concrete, asphalt, or the like.
  • the cutting machine 10 of this embodiment is constructed as a hand-push type in which the operator moves by pushing the cutting machine manually, but it may be constructed as a tractor-type in which the operator can ride.
  • the working section 11 is a unit that rotates the blade 11a using the power of the motor 12 to cut a structure.
  • the working part 11 may include a disk-shaped blade 11a rotatably supported by the body 17, and a cover member 11b attached to the body 17 so as to cover the upper part of the blade 11a.
  • the working unit 11 is not limited to a configuration in which the cutting operation is performed by rotating the blade 11a, and may have another type of configuration.
  • the motor 12 is a drive source that includes a stator (not shown) and a rotor 12a, and generates power (rotational force) to rotate the rotor 12a by energizing a coil provided on one of the stator and the rotor 12a.
  • the rotor 12a may be understood as a rotating shaft of the motor 12, and may be referred to as the rotating shaft 12a below.
  • the motor 12 is arranged so that the rotating shaft 12a extends in the left-right direction (Y direction). Further, the motor 12 is arranged on the body 17 between the working part 11 (blade 11a) and the wheels 18 in the front-rear direction (X direction). Note that the specific arrangement of the motor 12 will be described later.
  • the battery 13 is a power source that supplies power to the motor 12 via a cable (not shown).
  • the battery 13 is disposed above the motor 12 and is attached to the motor 12 (that is, supported by the motor 12).
  • the present invention is not limited thereto, and the battery 13 may be placed at any location, for example, it may be attached to the fuselage 17 (that is, it may be supported by the fuselage 17). Further, the battery 13 may be attached to the aircraft body 17 in a state where it is integrated with the motor 12 and the power control section 14.
  • FIG. 1 shows an example in which one battery 13 is mounted on the cutting machine 10, a plurality of (two or more) batteries 13 may be mounted.
  • the power control unit 14 is, for example, a PCU (Power Control Unit), and controls the power supplied from the battery 13 to the motor 12.
  • FIG. 1 shows an example in which the power control unit 14 is placed behind the battery 13, the position of the power control unit 14 is arbitrary. Further, the power control unit 14 may be provided in a state where it is integrated with the motor 12 and/or the battery 13.
  • the power transmission mechanism 15 is a mechanism that transmits the power (rotational force, driving force) of the motor 12 to the working part 11 (blade 11a).
  • the power transmission mechanism 15 is provided with a rotatable shaft (not shown) connected to the rotating shaft 12a of the motor 12 via a belt or the like, and the blade 11a is attached to the shaft. It is being Therefore, by transmitting the power of the motor 12 (that is, the rotational force of the rotating shaft 12a) to the shaft through a belt or the like and rotating the shaft, the power of the motor 12 is transmitted to the blade 11a, and the blade 11a is rotated. It can be rotated. Note that the blade 11a is detachable (replaceable) from the shaft of the power transmission mechanism 15.
  • the tank 16 is a water storage container that stores water supplied to the blade 11a in order to cool the blade 11a, which generates frictional heat during cutting work, and is located above the working part 11 (blade 11a) in the vertical direction (Z direction). It is located.
  • a tube 21 (water supply channel) is connected to the bottom of the tank 16 and the cover member 11b of the working part 11, and a certain amount of water is sequentially supplied from inside the tank 16 to the blade 11a via the tube 21 by gravity. .
  • a replenishment port 16a for replenishing water into the tank 16 is provided at the upper part of the tank 16.
  • the body 17 is configured as a base that supports the working part 11, the motor 12, the battery 13, the tank 16, and the like. That is, the working part 11, the motor 12, the battery 13, and the like are attached to the body 17. Further, a pair of left and right wheels 18 are rotatably supported at the rear of the body 17. Specifically, an axle 18a extending along the left-right direction (Y direction) is rotatably supported by the body 17, and a pair of left and right wheels 18 are attached to the ends of the axle 18a. Note that although the cutting machine 10 of this embodiment has a configuration including only two left and right wheels 18, it may have a configuration including three or more wheels. For example, it may be a four-wheeled configuration in which two pairs of left and right wheels 18 are arranged in the front-rear direction.
  • the handle portion 19 is a member that is held by the operator to push the cutting machine 10 by hand.
  • a work machine having such a handle part 19 is called a hand-push type work machine or a walk-behind work machine, and an operator can carry out cutting work by holding the handle part 19 and pushing the cutting machine 10 in a standing state. It can be carried out. Further, the handle portion 19 may be provided with an operation portion for an operator to operate the cutting machine 10.
  • the water stored in the tank 16 to cool the blade 11b is also used to cool the motor 12 (water cooling).
  • the motor 12 can be efficiently cooled (water-cooled), and there is no need to separately provide a tank for storing water for cooling the motor 12, which is advantageous for making the cutting machine 10 more compact. It can become.
  • a water jacket 12b (flow path) for circulating water around the motor 12 is provided around the motor 12, and the water in the tank 16 is passed through tubes 22 to 23 to the water jacket 12b. 12b, the motor 12 can be cooled (water-cooled).
  • the tube 22 is a water supply channel that connects the bottom of the tank 16 and the water jacket 12b and supplies water in the tank 16 to the water jacket 12b.
  • the tube 23 connects the bottom of the tank 16 and the water jacket 12b and is a drainage channel for discharging water flowing inside the water jacket 12b into the tank 16.
  • the water in the tank 16 is circulated around the motor 12 using the pump 16b, but the present invention is not limited to this, and the power of the motor 12 is used to circulate the water in the tank 16 around the motor 12. It may be circulated.
  • the cutting machine 10 of this embodiment also includes a sensor 16c that detects the amount of water stored in the tank 16, and a notification unit 20 that notifies by voice or the like that the amount of water detected by the sensor 16c has fallen below a threshold. and is provided.
  • the threshold may be set, for example, to the amount of water that can be circulated around the motor 12 to cool the motor 12.
  • FIGS. 2 to 6 are block diagrams schematically showing the blade 11a, motor 12, tank 16, body 17, wheels 18, handle portion 19, and tubes 21 to 23 in the cutting machine 10 shown in FIG. It will be used below to explain the placement requirements of the motor 12. Since the blades 11a and the motor 12 are each heat sources, it is preferable that they are arranged so that the heat generated thereon is less likely to interact with each other. Note that in the cutting machine 10 of this embodiment, not all of the arrangement requirements 1 to 7 shown below are essential, and it is preferable that at least one of the arrangement requirements 1 to 7 is satisfied. Further, the cutting machine 10 of the present embodiment may include placement requirements specified (defined) from FIGS. 1 to 6 in addition to or in place of placement requirements 1 to 7 below.
  • Arrangement requirement 1 is that, as shown in FIG. 2, the motor 12 is arranged so that the upper end of the motor 12 is higher than the upper end of the blade 11a in the vertical direction (Z direction). With this arrangement, the motor 12 can be brought closer to the tank 16 and the path for circulating water around the motor 12 (for example, the length of the tubes 22 to 23) can be shortened, so the motor 12 can be efficiently cooled. can do. Furthermore, since the motor 12 can be separated from the blade 11a in the vertical direction (Z direction), it is possible to reduce the influence of heat generated by the blade 11a on the motor 12, and to efficiently cool the motor 12.
  • Arrangement requirement 2 is that, as shown in FIG. 3, the motor 12 is arranged so that the front end of the motor 12 is located behind the front end of the blade 11a in the front-rear direction (X direction). With this arrangement, the center of gravity of the cutting machine 10 is placed between the front end of the blade 11a and the wheel 18, so the operator can lower the handle 19 and move the blade 11a toward the structure using the wheel 18 as a fulcrum. (e.g. from the road surface). Furthermore, since the motor 12 can be separated from the blade 11a in the front-rear direction (X direction), it is possible to reduce the effect of heat generated by the blade 11a on the motor 12, and to efficiently cool the motor 12.
  • Arrangement requirement 3 is that, as shown in FIG. 4, the motor 12 is arranged so that the front end of the motor 12 is located behind the rotation axis A of the blade 11a in the front-rear direction (X direction). With such an arrangement, the effect of the arrangement requirement 2 mentioned above can be further enhanced. Specifically, since the center of gravity of the cutting machine 10 is located between the rotation axis A of the blade 11a and the wheel 18, the operator can move the blade 11a around the wheel 18 by lowering the handle 19. It can be lifted more easily from objects (e.g. the road). Furthermore, since the motor 12 can be separated from the blade 11a in the front-rear direction (X direction), it is possible to further reduce the effect of the heat generated by the blade 11a on the motor 12, and to cool the motor 12 more efficiently. can.
  • Arrangement requirement 4 is that the motor 12 be arranged ahead of the rear end of the wheel 18 in the longitudinal direction (X direction), as shown in FIG. With this arrangement, the motor 12 can be brought closer to the tank 16 in the front-rear direction (X direction), and the path for circulating water around the motor 12 (for example, the length of the tubes 22 to 23) can be shortened. , the motor 12 can be efficiently cooled.
  • Arrangement requirement 5 is that, as shown in FIG. 4, the motor 12 is arranged between the rotation axis of the blade 11a and the rotation axis of the wheel 18 (axle shaft 18a) in the front-rear direction (X direction). This arrangement requirement 5 further restricts the arrangement requirements 2 to 4, so that the above effects of the arrangement requirements 2 to 4 can be further enhanced.
  • Arrangement requirement 6 is that the motor 12 is arranged so that the upper end of the motor 12 is lower than the lower end of the tank 16 in the vertical direction (Z direction). With this arrangement, the motor 12 is located below the lower end of the tank 16 in the vertical direction (Z direction), so water in the tank 16 is easily and efficiently supplied around the motor 12 by gravity. Therefore, the load on the power source (eg, pump 16b) for circulating water around the motor 12 can be reduced, and the motor 12 can be efficiently cooled.
  • the power source eg, pump 16b
  • Placement requirement 7 is that, as shown in FIG. 6, in a side view of the cutting machine 10 from the Y direction, the motor 12 is placed inside a circle C whose radius is a straight line L connecting the upper end of the tank 16 and the lower end of the blade 11a. is located. With this arrangement, the motor 12 can be prevented from being too far away from the blade 11a and the tank 16 when the blade 11a and the tank 16 are taken as a reference, which can be advantageous in making the cutting machine 10 more compact.
  • FIG. 7 is a block diagram schematically showing the cutting machine 10 of this embodiment, in which the blade 11a, motor 12, tank 16, body 17, wheels 18, and handle portion 19 are illustrated. With this configuration as well, the motor 12 can be efficiently cooled using the water stored in the tank 16.
  • the cutting machine of the above embodiment is A cutting machine (for example, 10) that cuts a structure by pressing a disk-shaped blade (for example, 11a) against the structure while rotating, a body (for example, 17) having wheels (for example, 18) and rotatably supporting the blade; a tank (e.g. 16) for storing water supplied to the blade for cooling the blade; a motor (for example 12) for rotationally driving the blade; Equipped with The motor is cooled using water stored in the tank. According to this configuration, the motor can be efficiently cooled (water-cooled), and there is no need to provide a separate tank to store water for cooling the motor, which is advantageous for making the cutting machine more compact. become.
  • the motor is cooled by circulating water stored in the tank around the motor. According to this configuration, the motor can be efficiently cooled using water for cooling the blades.
  • the apparatus further includes a pump (for example, 16b) for circulating water stored in the tank around the motor.
  • a pump for example, 16b
  • the motor can be efficiently cooled using water stored in the tank to cool the blades.
  • the power of the motor is used to circulate water stored in the tank around the motor. According to this configuration, the motor can be efficiently cooled using the water without separately providing a pump for circulating water around the motor for cooling the blades.
  • At least a portion of the motor is located inside the tank. According to this configuration, the motor can be efficiently cooled using water stored in the tank to cool the blades.
  • the tank is arranged above the blade in the vertical direction. According to this configuration, a certain amount of water can be sequentially supplied to the blade from inside the tank by gravity.
  • the motor is arranged such that the upper end of the motor is higher than the upper end of the blade in the vertical direction. According to this configuration, the motor can be brought closer to the tank and the path for circulating water around the motor can be shortened, so the motor can be efficiently cooled. Furthermore, since the motor can be separated from the blade in the vertical direction, it is possible to reduce the effect of heat generated by the blade on the motor, and to efficiently cool the motor.
  • the motor is arranged such that the front end of the motor is located behind the front end of the blade in the front-rear direction. According to this configuration, since the center of gravity of the cutting machine is located between the front end of the blade and the wheel, the blade can be easily lifted from the structure using the wheel as a fulcrum. Furthermore, since the motor can be separated from the blade in the front-rear direction, it is possible to reduce the effect of heat generated by the blade on the motor, and to efficiently cool the motor.
  • the motor is arranged such that the front end of the motor is located behind the rotation axis of the blade in the front-rear direction. According to this configuration, the center of gravity of the cutting machine is located between the rotating shaft of the blade and the wheel, so the blade can be easily lifted from the structure using the wheel as a fulcrum. Furthermore, since the motor can be separated from the blade in the front-rear direction, it is possible to further reduce the effect of heat generated by the blade on the motor, and to efficiently cool the motor.
  • the motor is arranged such that the upper end of the motor is lower than the lower end of the tank in the vertical direction. According to this configuration, since the motor is located below the lower end of the tank in the vertical direction, water in the tank is easily and efficiently supplied around the motor by gravity, and the motor can be efficiently cooled.
  • the motor is disposed forward of the rear end of the wheel. According to this configuration, the motor can be brought closer to the tank in the front-rear direction, and the path for circulating water around the motor can be shortened, so that the motor can be efficiently cooled.
  • the motor When viewed from the side, the motor is disposed inside a circle (for example, C) whose radius is a straight line (for example, L) connecting the upper end of the tank and the lower end of the blade.
  • C a circle
  • L a straight line
  • a sensor for example, 16c that detects the amount of water stored in the tank
  • a notification unit for example, 20 that notifies that the amount of water detected by the sensor has become below a threshold
  • the operator can grasp whether enough water is stored in the tank to circulate around the motor, that is, whether there is insufficient water to circulate around the motor. can do.
  • the motor is disposed between the rotation axis of the blade (for example, A) and the rotation axis of the wheel (for example, 18a) in the front-rear direction. According to this configuration, the motor can be brought closer to the tank in the front-rear direction, and the path for circulating water around the motor can be shortened, so that the motor can be efficiently cooled.
  • the cutting machine is a hand-held working machine that has a handle portion (for example, 19) that is gripped by an operator. According to this configuration, a hand-operated cutting machine is provided.

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Abstract

This cutting machine cutting a structure by pressing a disk-like blade against the structure while rotating the blade, the cutting machine comprises: a machine body which has a wheel and rotatably supports the blade; a tank which stores water to be supplied to the blade to cool the blade; and a motor for rotationally drive the blade, wherein the motor is cooled by using the water stored in the tank.

Description

切断機Cutting machine
　本発明は、切断機に関する。 The present invention relates to a cutting machine.
　特許文献１には、エンジンの動力によって回転刃を回転させるコンクリートカッタが開示されている。 Patent Document 1 discloses a concrete cutter in which a rotary blade is rotated by the power of an engine.
実用新案登録第３０５２６５３号公報Utility model registration No. 3052653
　近年、作業機では、気候関連災害の観点からＣＯ２の排出を削減するために電動化が進んでおり、モータの動力によって作業を行う構成に推移しつつある。路面や床面などの構造物を切断する切断機（カッター）においてもモータを用いることが予定されており、当該切断機に搭載されるモータを効率的に冷却することが望まれている。 In recent years, work equipment has been increasingly electrified in order to reduce CO 2 emissions from the perspective of climate-related disasters, and there is a shift toward configurations in which work is performed using motor power. Motors are also expected to be used in cutting machines (cutters) that cut structures such as roads and floors, and it is desired to efficiently cool the motors installed in the cutting machines.
　そこで、本発明は、切断機に搭載されるモータを効率的に冷却可能な技術を提供することを目的とする。 Therefore, an object of the present invention is to provide a technology that can efficiently cool a motor mounted on a cutting machine.
　上記目的を達成するために、本発明の一側面としての切断機は、円盤状のブレードを回転させながら構造物に押し当てることで前記構造物を切断する切断機であって、車輪を有するとともに、前記ブレードを回転可能に支持する機体と、前記ブレードを冷却するために前記ブレードに供給される水を貯留するタンクと、前記ブレードを回転駆動するためのモータと、を備え、前記タンクに貯留された水を用いて前記モータを冷却する、ことを特徴とする。 In order to achieve the above object, a cutting machine according to one aspect of the present invention is a cutting machine that cuts a structure by pressing a disc-shaped blade against the structure while rotating, and has wheels. , comprising a body that rotatably supports the blade, a tank that stores water supplied to the blade to cool the blade, and a motor that rotationally drives the blade, and the water is stored in the tank. The motor is characterized in that the motor is cooled using the water.
　本発明によれば、切断機に搭載されるモータを効率的に冷却可能な技術を提供することができる。 According to the present invention, it is possible to provide a technology that can efficiently cool a motor mounted on a cutting machine.
　添付図面は明細書に含まれ、その一部を構成し、本発明の実施の形態を示し、その記述と共に本発明の原理を説明するために用いられる。 The accompanying drawings are included in and constitute a part of the specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention.
本発明に係る切断機の構成例を示す図A diagram showing an example of the configuration of a cutting machine according to the present invention 本発明に係る切断機を模式的に示したブロック図A block diagram schematically showing a cutting machine according to the present invention 本発明に係る切断機を模式的に示したブロック図A block diagram schematically showing a cutting machine according to the present invention 本発明に係る切断機を模式的に示したブロック図A block diagram schematically showing a cutting machine according to the present invention 本発明に係る切断機を模式的に示したブロック図A block diagram schematically showing a cutting machine according to the present invention 本発明に係る切断機を模式的に示したブロック図A block diagram schematically showing a cutting machine according to the present invention 本発明に係る切断機の他の実施形態を模式的に示したブロック図A block diagram schematically showing another embodiment of the cutting machine according to the present invention
　以下、添付図面を参照して実施形態を詳しく説明する。なお、以下の実施形態は特許請求の範囲に係る発明を限定するものではなく、また実施形態で説明されている特徴の組み合わせの全てが発明に必須のものとは限らない。実施形態で説明されている複数の特徴のうち二つ以上の特徴は任意に組み合わされてもよい。また、同一若しくは同様の構成には同一の参照番号を付し、重複した説明は省略する。 Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the claimed invention, and not all combinations of features described in the embodiments are essential to the invention. Two or more features among the plurality of features described in the embodiments may be arbitrarily combined. In addition, the same or similar configurations are given the same reference numerals, and duplicate explanations will be omitted.
　本発明に係る一実施形態の切断機１０について説明する。以下で説明する各図において、矢印Ｘ、Ｙ、Ｚは互いに直交する方向を示し、Ｘ方向が切断機１０の前後方向、Ｙ方向が切断機１０の左右方向（幅方向）、Ｚ方向が切断機１０の上下方向をそれぞれ示している。なお、本実施形態では、＋Ｘ方向が切断機１０の進行方向を示しており、その進行方向に対し、＋Ｙ方向が左方向（切断機１０の左側）を、－Ｙ方向が右方向（切断機１０の右側）を示している。 A cutting machine 10 according to an embodiment of the present invention will be described. In each figure described below, arrows X, Y, and Z indicate directions perpendicular to each other, where the X direction is the front-rear direction of the cutting machine 10, the Y direction is the left-right direction (width direction) of the cutting machine 10, and the Z direction is the cutting direction. The vertical direction of the machine 10 is shown respectively. In the present embodiment, the +X direction indicates the direction of movement of the cutting machine 10, and with respect to the direction of movement, the +Y direction indicates the left direction (the left side of the cutting machine 10), and the -Y direction indicates the right direction (the left side of the cutting machine 10). 10) is shown.
　［切断機の構成例］
　図１は、本実施形態の切断機１０の構成例を示している。切断機１０は、円盤状のブレード１１ａを回転させながら構造物に押し当てることによって当該構造物を切断する作業機であり、カッターと呼ばれることがある。本実施形態の切断機１０は、作業部１１と、モータ１２と、バッテリ１３と、電力制御部１４と、動力伝達機構１５と、タンク１６と、機体１７（基台）と、左右一対の車輪１８と、ハンドル部１９とを備える電動式の作業機である。本実施形態の切断機１０による切断対象となる構造物としては、例えば、コンクリートやアスファルト等で構成された路面、床面、床版などが挙げられる。なお、本実施形態の切断機１０は、作業者が手押しすることで走行する手押し式に構成されているが、作業者が搭乗することができるトラクタ式に構成されてもよい。 [Example of configuration of cutting machine]
FIG. 1 shows an example of the configuration of a cutting machine 10 according to this embodiment. The cutting machine 10 is a working machine that cuts a structure by rotating and pressing a disc-shaped blade 11a against the structure, and is sometimes called a cutter. The cutting machine 10 of this embodiment includes a working part 11, a motor 12, a battery 13, a power control part 14, a power transmission mechanism 15, a tank 16, a machine body 17 (base), and a pair of left and right wheels. 18 and a handle portion 19. Examples of structures to be cut by the cutting machine 10 of this embodiment include road surfaces, floors, and floor slabs made of concrete, asphalt, or the like. Note that the cutting machine 10 of this embodiment is constructed as a hand-push type in which the operator moves by pushing the cutting machine manually, but it may be constructed as a tractor-type in which the operator can ride.
　作業部１１は、モータ１２の動力によりブレード１１ａを回転させて構造物の切断作業を行うためのユニットである。本実施形態の場合、作業部１１は、機体１７によって回転可能に支持された円盤状のブレード１１ａと、ブレード１１ａの上部を覆うように機体１７に取り付けられたカバー部材１１ｂとを含みうる。なお、作業部１１は、ブレード１１ａを回転させることにより切断作業を行う構成に限られるものではなく、他のタイプの構成であってもよい。 The working section 11 is a unit that rotates the blade 11a using the power of the motor 12 to cut a structure. In the case of this embodiment, the working part 11 may include a disk-shaped blade 11a rotatably supported by the body 17, and a cover member 11b attached to the body 17 so as to cover the upper part of the blade 11a. Note that the working unit 11 is not limited to a configuration in which the cutting operation is performed by rotating the blade 11a, and may have another type of configuration.
　モータ１２は、ステータ（不図示）とロータ１２ａとを有し、当該ステータおよびロータ１２ａの一方に設けられたコイルに通電することによってロータ１２ａを回転させる動力（回転力）を発生する駆動源である。ロータ１２ａは、モータ１２の回転軸として理解されてもよく、以下では回転軸１２ａと表記することがある。本実施形態の場合、モータ１２は、回転軸１２ａが左右方向（Ｙ方向）に延伸するように配置される。また、モータ１２は、前後方向（Ｘ方向）における作業部１１（ブレード１１ａ）と車輪１８との間の機体１７上に配置される。なお、モータ１２の具体的な配置については後述する。 The motor 12 is a drive source that includes a stator (not shown) and a rotor 12a, and generates power (rotational force) to rotate the rotor 12a by energizing a coil provided on one of the stator and the rotor 12a. be. The rotor 12a may be understood as a rotating shaft of the motor 12, and may be referred to as the rotating shaft 12a below. In the case of this embodiment, the motor 12 is arranged so that the rotating shaft 12a extends in the left-right direction (Y direction). Further, the motor 12 is arranged on the body 17 between the working part 11 (blade 11a) and the wheels 18 in the front-rear direction (X direction). Note that the specific arrangement of the motor 12 will be described later.
　バッテリ１３は、ケーブル（不図示）を介してモータ１２に電力を供給する電力源である。本実施形態の場合、バッテリ１３は、モータ１２の上方に配置されており、モータ１２に取り付けられている（即ち、モータ１２によって支持されている）。但し、それに限られず、バッテリ１３は、任意の場所に配置されてもよく、例えば機体１７に取り付けられてもよい（即ち、機体１７によって支持されてもよい）。また、バッテリ１３は、モータ１２および電力制御部１４と一体化された状態で機体１７に取り付けられてもよい。さらに、図１の例では、切断機１０に１個のバッテリ１３を搭載した例を示しているが、複数（２個以上）のバッテリ１３を搭載してもよい。 The battery 13 is a power source that supplies power to the motor 12 via a cable (not shown). In the case of this embodiment, the battery 13 is disposed above the motor 12 and is attached to the motor 12 (that is, supported by the motor 12). However, the present invention is not limited thereto, and the battery 13 may be placed at any location, for example, it may be attached to the fuselage 17 (that is, it may be supported by the fuselage 17). Further, the battery 13 may be attached to the aircraft body 17 in a state where it is integrated with the motor 12 and the power control section 14. Furthermore, although the example of FIG. 1 shows an example in which one battery 13 is mounted on the cutting machine 10, a plurality of (two or more) batteries 13 may be mounted.
　電力制御部１４は、例えばＰＣＵ（Power Control Unit）であり、バッテリ１３からモータ１２に供給される電力を制御する。図１では、電力制御部１４がバッテリ１３の後方に配置されている例を示しているが、電力制御部１４の位置は任意である。また、電力制御部１４は、モータ１２および／またはバッテリ１３と一体化された状態で設けられてもよい。 The power control unit 14 is, for example, a PCU (Power Control Unit), and controls the power supplied from the battery 13 to the motor 12. Although FIG. 1 shows an example in which the power control unit 14 is placed behind the battery 13, the position of the power control unit 14 is arbitrary. Further, the power control unit 14 may be provided in a state where it is integrated with the motor 12 and/or the battery 13.
　動力伝達機構１５は、モータ１２の動力（回転力、駆動力）を作業部１１（ブレード１１ａ）に伝達する機構である。本実施形態の場合、動力伝達機構１５には、ベルト等を介してモータ１２の回転軸１２ａに連結された回転可能なシャフト（不図示）が設けられており、当該シャフトにはブレード１１ａが取り付けられている。そのため、ベルト等を介してモータ１２の動力（即ち、回転軸１２ａの回転力）を当該シャフトに伝達させて当該シャフトを回転させることにより、モータ１２の動力をブレード１１ａに伝達させ、ブレード１１ａを回転させることができる。なお、ブレード１１ａは、動力伝達機構１５のシャフトに対して着脱可能（交換可能）である。 The power transmission mechanism 15 is a mechanism that transmits the power (rotational force, driving force) of the motor 12 to the working part 11 (blade 11a). In the case of this embodiment, the power transmission mechanism 15 is provided with a rotatable shaft (not shown) connected to the rotating shaft 12a of the motor 12 via a belt or the like, and the blade 11a is attached to the shaft. It is being Therefore, by transmitting the power of the motor 12 (that is, the rotational force of the rotating shaft 12a) to the shaft through a belt or the like and rotating the shaft, the power of the motor 12 is transmitted to the blade 11a, and the blade 11a is rotated. It can be rotated. Note that the blade 11a is detachable (replaceable) from the shaft of the power transmission mechanism 15.
　タンク１６は、切断作業で摩擦熱が生じるブレード１１ａを冷却するためにブレード１１ａに供給される水を貯留する貯水容器であり、上下方向（Ｚ方向）における作業部１１（ブレード１１ａ）より上方に配置されている。タンク１６の底部と作業部１１のカバー部材１１ｂとにはチューブ２１（給水路）が接続されており、タンク１６内から一定量の水が重力によりチューブ２１を介してブレード１１ａに逐次供給される。また、タンク１６の上部には、タンク１６内に水を補給するための補給口１６ａが設けられている。 The tank 16 is a water storage container that stores water supplied to the blade 11a in order to cool the blade 11a, which generates frictional heat during cutting work, and is located above the working part 11 (blade 11a) in the vertical direction (Z direction). It is located. A tube 21 (water supply channel) is connected to the bottom of the tank 16 and the cover member 11b of the working part 11, and a certain amount of water is sequentially supplied from inside the tank 16 to the blade 11a via the tube 21 by gravity. . Furthermore, a replenishment port 16a for replenishing water into the tank 16 is provided at the upper part of the tank 16.
　機体１７は、作業部１１、モータ１２、バッテリ１３およびタンク１６などを支持する基台として構成される。即ち、作業部１１、モータ１２およびバッテリ１３などが機体１７に取り付けられる。また、機体１７の後部には、左右一対の車輪１８が回転可能に軸支されている。具体的には、左右方向（Ｙ方向）に沿って延伸した車軸１８ａが機体１７に回転可能に軸支されており、当該車軸１８ａの端部に左右一対の車輪１８が取り付けられている。なお、本実施形態の切断機１０は、左右一対の２つの車輪１８のみを含む構成であるが、３つ以上の車輪を含む構成であってもよい。例えば、左右一対の車輪１８を前後方向に２組並べた四輪の構成であってもよい。 The body 17 is configured as a base that supports the working part 11, the motor 12, the battery 13, the tank 16, and the like. That is, the working part 11, the motor 12, the battery 13, and the like are attached to the body 17. Further, a pair of left and right wheels 18 are rotatably supported at the rear of the body 17. Specifically, an axle 18a extending along the left-right direction (Y direction) is rotatably supported by the body 17, and a pair of left and right wheels 18 are attached to the ends of the axle 18a. Note that although the cutting machine 10 of this embodiment has a configuration including only two left and right wheels 18, it may have a configuration including three or more wheels. For example, it may be a four-wheeled configuration in which two pairs of left and right wheels 18 are arranged in the front-rear direction.
　ハンドル部１９は、作業者が切断機１０を手押しするために把持する部材である。このようなハンドル部１９を有する作業機は、手押し式作業機あるいは歩行型作業機と呼ばれ、作業者は、立位状態においてハンドル部１９を把持して切断機１０を押すことによって切断作業を行うことができる。また、ハンドル部１９には、作業者が切断機１０を操作するための操作部が設けられてもよい。 The handle portion 19 is a member that is held by the operator to push the cutting machine 10 by hand. A work machine having such a handle part 19 is called a hand-push type work machine or a walk-behind work machine, and an operator can carry out cutting work by holding the handle part 19 and pushing the cutting machine 10 in a standing state. It can be carried out. Further, the handle portion 19 may be provided with an operation portion for an operator to operate the cutting machine 10.
　ここで、本実施形態の切断機１０では、ブレード１１ｂを冷却するためにタンク１６に貯留された水が、モータ１２を冷却（水冷）するためにも用いられる。これにより、モータ１２を効率よく冷却（水冷）することができるとともに、モータ１２を冷却するための水を貯留するためのタンクを別途設けなくてもよいため、切断機１０のコンパクト化にも有利になりうる。 Here, in the cutting machine 10 of this embodiment, the water stored in the tank 16 to cool the blade 11b is also used to cool the motor 12 (water cooling). As a result, the motor 12 can be efficiently cooled (water-cooled), and there is no need to separately provide a tank for storing water for cooling the motor 12, which is advantageous for making the cutting machine 10 more compact. It can become.
　図１の例では、モータ１２の周囲で水を循環させるためのウォータジャケット１２ｂ（流路）がモータ１２の周囲に設けられており、タンク１６内の水をチューブ２２～２３を介してウォータジャケット１２ｂに流すことによって、モータ１２を冷却（水冷）することができる。チューブ２２は、タンク１６の底部とウォータジャケット１２ｂとを接続し、タンク１６内の水をウォータジャケット１２ｂに供給するための給水路である。チューブ２３は、タンク１６の底部とウォータジャケット１２ｂとを接続し、ウォータジャケット１２ｂ内を流れた水をタンク１６内に排出するための排水路である。図１の例では、ポンプ１６ｂを用いてタンク１６内の水をモータ１２の周囲で循環させているが、それに限られず、モータ１２の動力を用いてタンク１６内の水をモータ１２の周囲で循環させてもよい。 In the example shown in FIG. 1, a water jacket 12b (flow path) for circulating water around the motor 12 is provided around the motor 12, and the water in the tank 16 is passed through tubes 22 to 23 to the water jacket 12b. 12b, the motor 12 can be cooled (water-cooled). The tube 22 is a water supply channel that connects the bottom of the tank 16 and the water jacket 12b and supplies water in the tank 16 to the water jacket 12b. The tube 23 connects the bottom of the tank 16 and the water jacket 12b and is a drainage channel for discharging water flowing inside the water jacket 12b into the tank 16. In the example of FIG. 1, the water in the tank 16 is circulated around the motor 12 using the pump 16b, but the present invention is not limited to this, and the power of the motor 12 is used to circulate the water in the tank 16 around the motor 12. It may be circulated.
　また、本実施形態の切断機１０には、タンク１６に貯留されている水量を検知するセンサ１６ｃと、センサ１６ｃで検知された水量が閾値以下になったことを音声等により報知する報知部２０とが設けられている。閾値は、例えば、モータ１２を冷却するためにモータ１２の周囲で循環させることができる水の量に設定されうる。このようなセンサ１６ｃおよび報知部２０を設けることにより、作業者は、モータ１２の周囲で循環させることができる量の水がタンク１６に貯留されているか否か、即ち、モータ１２の周囲で循環させる水が不足しているか否かを把握することができる。 The cutting machine 10 of this embodiment also includes a sensor 16c that detects the amount of water stored in the tank 16, and a notification unit 20 that notifies by voice or the like that the amount of water detected by the sensor 16c has fallen below a threshold. and is provided. The threshold may be set, for example, to the amount of water that can be circulated around the motor 12 to cool the motor 12. By providing such a sensor 16c and a notification unit 20, an operator can determine whether or not enough water is stored in the tank 16 to circulate around the motor 12. It is possible to understand whether or not there is a shortage of water.
　［モータの配置要件］
　次に、本実施形態の切断機１０におけるモータ１２の配置要件について、図２～図６を参照しながら説明する。図２～図６は、図１に示す切断機１０におけるブレード１１ａ、モータ１２、タンク１６、機体１７、車輪１８、ハンドル部１９、およびチューブ２１～２３を模式的に示したブロック図であり、以下でモータ１２の配置要件を説明するために用いられる。ブレード１１ａおよびモータ１２は、それぞれが熱源であるため、それらで発生した熱が相互に作用し合うことが低減されるように配置されることが好ましい。なお、本実施形態の切断機１０では、以下に示す配置要件１～７の全てが必須であるわけではなく、配置要件１～７のうち１つでも満たしていることが好ましい。また、本実施形態の切断機１０は、以下の配置要件１～７に追加的に又は代替的に、図１～図６から特定（規定）される配置要件を含んでもよい。 [Motor placement requirements]
Next, the requirements for the arrangement of the motor 12 in the cutting machine 10 of this embodiment will be explained with reference to FIGS. 2 to 6. 2 to 6 are block diagrams schematically showing the blade 11a, motor 12, tank 16, body 17, wheels 18, handle portion 19, and tubes 21 to 23 in the cutting machine 10 shown in FIG. It will be used below to explain the placement requirements of the motor 12. Since the blades 11a and the motor 12 are each heat sources, it is preferable that they are arranged so that the heat generated thereon is less likely to interact with each other. Note that in the cutting machine 10 of this embodiment, not all of the arrangement requirements 1 to 7 shown below are essential, and it is preferable that at least one of the arrangement requirements 1 to 7 is satisfied. Further, the cutting machine 10 of the present embodiment may include placement requirements specified (defined) from FIGS. 1 to 6 in addition to or in place of placement requirements 1 to 7 below.
　（配置要件１）
　配置要件１は、図２に示すように、上下方向（Ｚ方向）においてモータ１２の上端がブレード１１ａの上端より高くなるようにモータ１２が配置されていることである。このような配置により、モータ１２をタンク１６に近づけ、モータ１２の周囲で水を循環させるための経路（例えばチューブ２２～２３の長さ）を短縮することができるため、効率よくモータ１２を冷却することができる。また、上下方向（Ｚ方向）において、モータ１２をブレード１１ａから離すことができるため、ブレード１１ａで発生した熱がモータ１２に影響することを低減し、モータ１２を効率よく冷却することができる。 (Placement requirement 1)
Arrangement requirement 1 is that, as shown in FIG. 2, the motor 12 is arranged so that the upper end of the motor 12 is higher than the upper end of the blade 11a in the vertical direction (Z direction). With this arrangement, the motor 12 can be brought closer to the tank 16 and the path for circulating water around the motor 12 (for example, the length of the tubes 22 to 23) can be shortened, so the motor 12 can be efficiently cooled. can do. Furthermore, since the motor 12 can be separated from the blade 11a in the vertical direction (Z direction), it is possible to reduce the influence of heat generated by the blade 11a on the motor 12, and to efficiently cool the motor 12.
　（配置要件２）
　配置要件２は、図３に示すように、前後方向（Ｘ方向）においてモータ１２の前端がブレード１１ａの前端より後方になるようにモータ１２が配置されていることである。このような配置により、切断機１０の重心がブレード１１ａの前端と車輪１８との間に配置されるため、作業者は、ハンドル部１９を下げることで、車輪１８を支点としてブレード１１ａを構造物（例えば路面）から容易に持ち上げることができる。また、前後方向（Ｘ方向）において、モータ１２をブレード１１ａから離すことができるため、ブレード１１ａで発生した熱がモータ１２に影響することを低減し、モータ１２を効率よく冷却することができる。 (Placement requirement 2)
Arrangement requirement 2 is that, as shown in FIG. 3, the motor 12 is arranged so that the front end of the motor 12 is located behind the front end of the blade 11a in the front-rear direction (X direction). With this arrangement, the center of gravity of the cutting machine 10 is placed between the front end of the blade 11a and the wheel 18, so the operator can lower the handle 19 and move the blade 11a toward the structure using the wheel 18 as a fulcrum. (e.g. from the road surface). Furthermore, since the motor 12 can be separated from the blade 11a in the front-rear direction (X direction), it is possible to reduce the effect of heat generated by the blade 11a on the motor 12, and to efficiently cool the motor 12.
　（配置要件３）
　配置要件３は、図４に示すように、前後方向（Ｘ方向）においてモータ１２の前端がブレード１１ａの回転軸Ａより後方になるようにモータ１２が配置されていることである。このような配置により、前述した配置要件２の効果をより高めることができる。具体的には、切断機１０の重心がブレード１１ａの回転軸Ａと車輪１８との間に配置されるため、作業者は、ハンドル部１９を下げることで、車輪１８を支点としてブレード１１ａを構造物（例えば路面）から更に容易に持ち上げることができる。また、前後方向（Ｘ方向）において、モータ１２をブレード１１ａから離すことができるため、ブレード１１ａで発生した熱がモータ１２に影響することを更に低減し、モータ１２を更に効率よく冷却することができる。 (Placement requirement 3)
Arrangement requirement 3 is that, as shown in FIG. 4, the motor 12 is arranged so that the front end of the motor 12 is located behind the rotation axis A of the blade 11a in the front-rear direction (X direction). With such an arrangement, the effect of the arrangement requirement 2 mentioned above can be further enhanced. Specifically, since the center of gravity of the cutting machine 10 is located between the rotation axis A of the blade 11a and the wheel 18, the operator can move the blade 11a around the wheel 18 by lowering the handle 19. It can be lifted more easily from objects (e.g. the road). Furthermore, since the motor 12 can be separated from the blade 11a in the front-rear direction (X direction), it is possible to further reduce the effect of the heat generated by the blade 11a on the motor 12, and to cool the motor 12 more efficiently. can.
　（配置要件４）
　配置要件４は、図５に示すように、前後方向（Ｘ方向）において車輪１８の後端より前方にモータ１２が配置されていることである。このような配置により、前後方向（Ｘ方向）においてモータ１２をタンク１６に近づけ、モータ１２の周囲で水を循環させるための経路（例えばチューブ２２～２３の長さ）を短縮することができるため、効率よくモータ１２を冷却することができる。 (Placement requirement 4)
Arrangement requirement 4 is that the motor 12 be arranged ahead of the rear end of the wheel 18 in the longitudinal direction (X direction), as shown in FIG. With this arrangement, the motor 12 can be brought closer to the tank 16 in the front-rear direction (X direction), and the path for circulating water around the motor 12 (for example, the length of the tubes 22 to 23) can be shortened. , the motor 12 can be efficiently cooled.
　（配置要件５）
　配置要件５は、図４に示すように、前後方向（Ｘ方向）においてブレード１１ａの回転軸と車輪１８の回転軸（車軸１８ａ）との間にモータ１２が配置されていることである。この配置要件５は、配置要件２～４を更に制限したものであるため、配置要件２～４の上記の効果をより高めることができる。 (Placement requirement 5)
Arrangement requirement 5 is that, as shown in FIG. 4, the motor 12 is arranged between the rotation axis of the blade 11a and the rotation axis of the wheel 18 (axle shaft 18a) in the front-rear direction (X direction). This arrangement requirement 5 further restricts the arrangement requirements 2 to 4, so that the above effects of the arrangement requirements 2 to 4 can be further enhanced.
　（配置要件６）
　配置要件６は、図５に示すように、上下方向（Ｚ方向）においてモータ１２の上端がタンク１６の下端より低くなるようにモータ１２が配置されていることである。このような配置により、上下方向（Ｚ方向）においてモータ１２がタンク１６の下端より下方に位置するため、重力によりタンク１６内の水がモータ１２の周囲に容易に且つ効率よく供給される。したがって、モータ１２の周囲で水を循環させるための動力源（例えばポンプ１６ｂ）の負荷を低減することができるとともに、モータ１２を効率よく冷却することができる。 (Placement requirement 6)
Arrangement requirement 6 is that the motor 12 is arranged so that the upper end of the motor 12 is lower than the lower end of the tank 16 in the vertical direction (Z direction). With this arrangement, the motor 12 is located below the lower end of the tank 16 in the vertical direction (Z direction), so water in the tank 16 is easily and efficiently supplied around the motor 12 by gravity. Therefore, the load on the power source (eg, pump 16b) for circulating water around the motor 12 can be reduced, and the motor 12 can be efficiently cooled.
　（配置要件７）
　配置要件７は、図６に示すように、Ｙ方向から切断機１０を見た側面視において、タンク１６の上端とブレード１１ａの下端とを結ぶ直線Ｌを半径とする円Ｃの内側にモータ１２が配置されていることである。このような配置により、ブレード１１ａおよびタンク１６を基準としたときに、ブレード１１ａおよびタンク１６からモータ１２が離れすぎないようにすることができるため、切断機１０のコンパクト化に有利になりうる。 (Placement requirement 7)
Placement requirement 7 is that, as shown in FIG. 6, in a side view of the cutting machine 10 from the Y direction, the motor 12 is placed inside a circle C whose radius is a straight line L connecting the upper end of the tank 16 and the lower end of the blade 11a. is located. With this arrangement, the motor 12 can be prevented from being too far away from the blade 11a and the tank 16 when the blade 11a and the tank 16 are taken as a reference, which can be advantageous in making the cutting machine 10 more compact.
　＜他の実施形態＞
　上記の実施形態では、モータ１２の周囲に設けられたウォータジャケット１２ｂにタンク１６内の水を流すことによってモータ１２を冷却する構成としたが、それに限られず、図７に示すように、モータ１２の少なくとも一部をタンク１６の内部に配置する構成としてもよい。図７は、本実施形態の切断機１０を模式的に示したブロック図であり、ブレード１１ａ、モータ１２、タンク１６、機体１７、車輪１８およびハンドル部１９が図示されている。この構成によっても、タンク１６に貯留された水を用いてモータ１２を効率よく冷却することができる。 <Other embodiments>
In the above embodiment, the motor 12 is cooled by flowing the water in the tank 16 through the water jacket 12b provided around the motor 12. However, the present invention is not limited to this, and as shown in FIG. At least a portion of the tank 16 may be arranged inside the tank 16. FIG. 7 is a block diagram schematically showing the cutting machine 10 of this embodiment, in which the blade 11a, motor 12, tank 16, body 17, wheels 18, and handle portion 19 are illustrated. With this configuration as well, the motor 12 can be efficiently cooled using the water stored in the tank 16.
　＜実施形態のまとめ＞
　１．上記実施形態の切断機は、
　円盤状のブレード（例えば１１ａ）を回転させながら構造物に押し当てることで前記構造物を切断する切断機（例えば１０）であって、
　車輪（例えば１８）を有するとともに、前記ブレードを回転可能に支持する機体（例えば１７）と、
　前記ブレードを冷却するために前記ブレードに供給される水を貯留するタンク（例えば１６）と、
　前記ブレードを回転駆動するためのモータ（例えば１２）と、
　を備え、
　前記タンクに貯留された水を用いて前記モータを冷却する。
　この構成によれば、モータを効率よく冷却（水冷）することができるとともに、モータを冷却するための水を貯留するためのタンクを別途設けなくてもよいため、切断機のコンパクト化にも有利になる。 <Summary of embodiments>
1. The cutting machine of the above embodiment is
A cutting machine (for example, 10) that cuts a structure by pressing a disk-shaped blade (for example, 11a) against the structure while rotating,
a body (for example, 17) having wheels (for example, 18) and rotatably supporting the blade;
a tank (e.g. 16) for storing water supplied to the blade for cooling the blade;
a motor (for example 12) for rotationally driving the blade;
Equipped with
The motor is cooled using water stored in the tank.
According to this configuration, the motor can be efficiently cooled (water-cooled), and there is no need to provide a separate tank to store water for cooling the motor, which is advantageous for making the cutting machine more compact. become.
　２．上記実施形態において、
　前記タンクに貯留された水を前記モータの周囲で循環させることにより前記モータを冷却する。
　この構成によれば、ブレードを冷却するための水を用いてモータを効率よく冷却することができる。 2. In the above embodiment,
The motor is cooled by circulating water stored in the tank around the motor.
According to this configuration, the motor can be efficiently cooled using water for cooling the blades.
　３．上記実施形態において、
　前記タンクに貯留された水を前記モータの周囲で循環させるためのポンプ（例えば１６ｂ）を更に備える。
　この構成によれば、ブレードを冷却するためにタンクに貯留された水を用いてモータを効率よく冷却することができる。 3. In the above embodiment,
The apparatus further includes a pump (for example, 16b) for circulating water stored in the tank around the motor.
According to this configuration, the motor can be efficiently cooled using water stored in the tank to cool the blades.
　４．上記実施形態において、
　前記モータの動力を用いて、前記タンクに貯留された水を前記モータの周囲で循環させる。
　この構成によれば、ブレードを冷却するための水をモータの周囲で循環させるためのポンプを別途設けなくとも、当該水を用いてモータを効率よく冷却することができる。 4. In the above embodiment,
The power of the motor is used to circulate water stored in the tank around the motor.
According to this configuration, the motor can be efficiently cooled using the water without separately providing a pump for circulating water around the motor for cooling the blades.
　５．上記実施形態において、
　前記モータの少なくとも一部が前記タンクの内部に配置されている。
　この構成によれば、ブレードを冷却するためにタンクに貯留された水を用いてモータを効率よく冷却することができる。 5. In the above embodiment,
At least a portion of the motor is located inside the tank.
According to this configuration, the motor can be efficiently cooled using water stored in the tank to cool the blades.
　６．上記実施形態において、
　前記タンクは、上下方向において前記ブレードより上方に配置されている。
　この構成によれば、重力によってタンク内から一定量の水をブレードに逐次供給することができる。 6. In the above embodiment,
The tank is arranged above the blade in the vertical direction.
According to this configuration, a certain amount of water can be sequentially supplied to the blade from inside the tank by gravity.
　７．上記実施形態において、
　前記モータは、上下方向において前記モータの上端が前記ブレードの上端より高くなるように配置されている。
　この構成によれば、モータをタンクに近づけ、モータの周囲で水を循環させる経路を短縮することができるため、効率よくモータを冷却することができる。また、上下方向において、モータをブレードから離すことができるため、ブレードで発生した熱がモータに影響することを低減し、モータを効率よく冷却することができる。 7. In the above embodiment,
The motor is arranged such that the upper end of the motor is higher than the upper end of the blade in the vertical direction.
According to this configuration, the motor can be brought closer to the tank and the path for circulating water around the motor can be shortened, so the motor can be efficiently cooled. Furthermore, since the motor can be separated from the blade in the vertical direction, it is possible to reduce the effect of heat generated by the blade on the motor, and to efficiently cool the motor.
　８．上記実施形態において、
　前記モータは、前後方向において前記モータの前端が前記ブレードの前端より後方になるように配置されている。
　この構成によれば、切断機の重心がブレードの前端と車輪との間に配置されるため、車輪を支点としてブレードを構造物から容易に持ち上げることができる。また、前後方向において、モータをブレードから離すことができるため、ブレードで発生した熱がモータに影響することを低減し、モータを効率よく冷却することができる。 8. In the above embodiment,
The motor is arranged such that the front end of the motor is located behind the front end of the blade in the front-rear direction.
According to this configuration, since the center of gravity of the cutting machine is located between the front end of the blade and the wheel, the blade can be easily lifted from the structure using the wheel as a fulcrum. Furthermore, since the motor can be separated from the blade in the front-rear direction, it is possible to reduce the effect of heat generated by the blade on the motor, and to efficiently cool the motor.
　９．上記実施形態において、
　前記モータは、前後方向において前記モータの前端が前記ブレードの回転軸より後方になるように配置されている。
　この構成によれば、切断機の重心がブレードの回転軸と車輪との間に配置されるため、車輪を支点としてブレードを構造物から容易に持ち上げることができる。また、前後方向において、モータをブレードから離すことができるため、ブレードで発生した熱がモータに影響することを更に低減し、モータを効率よく冷却することができる。 9. In the above embodiment,
The motor is arranged such that the front end of the motor is located behind the rotation axis of the blade in the front-rear direction.
According to this configuration, the center of gravity of the cutting machine is located between the rotating shaft of the blade and the wheel, so the blade can be easily lifted from the structure using the wheel as a fulcrum. Furthermore, since the motor can be separated from the blade in the front-rear direction, it is possible to further reduce the effect of heat generated by the blade on the motor, and to efficiently cool the motor.
　１０．上記実施形態において、
　前記モータは、上下方向において前記モータの上端が前記タンクの下端より低くなるように配置されている。
　この構成によれば、上下方向においてモータがタンクの下端より下方に位置するため、重力によりタンク内の水がモータの周囲に容易に且つ効率よく供給され、モータを効率よく冷却することができる。 10. In the above embodiment,
The motor is arranged such that the upper end of the motor is lower than the lower end of the tank in the vertical direction.
According to this configuration, since the motor is located below the lower end of the tank in the vertical direction, water in the tank is easily and efficiently supplied around the motor by gravity, and the motor can be efficiently cooled.
　１１．上記実施形態において、
　前記モータは、前記車輪の後端より前方に配置されている。
　この構成によれば、前後方向においてモータをタンクに近づけ、モータの周囲で水を循環させるための経路を短縮することができるため、効率よくモータを冷却することができる。 11. In the above embodiment,
The motor is disposed forward of the rear end of the wheel.
According to this configuration, the motor can be brought closer to the tank in the front-rear direction, and the path for circulating water around the motor can be shortened, so that the motor can be efficiently cooled.
　１２．上記実施形態において、
　前記モータは、側面視において、前記タンクの上端と前記ブレードの下端とを結ぶ直線（例えばＬ）を半径とする円（例えばＣ）の内側に配置されている。
　この構成によれば、ブレードおよびタンクを基準としたときに、ブレードおよびタンクからモータが離れすぎないようにすることができるため、切断機のコンパクト化に有利になる。 12. In the above embodiment,
When viewed from the side, the motor is disposed inside a circle (for example, C) whose radius is a straight line (for example, L) connecting the upper end of the tank and the lower end of the blade.
According to this configuration, since it is possible to prevent the motor from being too far away from the blade and the tank when the blade and the tank are taken as a reference, it is advantageous for making the cutting machine more compact.
　１３．上記実施形態において、
　前記タンクに貯留されている水量を検知するセンサ（例えば１６ｃ）と、
　前記センサで検知された水量が閾値以下になったことを報知する報知部（例えば２０）と、
　を更に備える。
　この構成によれば、作業者は、モータの周囲で循環させることができる量の水がタンクに貯留されているか否か、即ち、モータの周囲で循環させる水が不足しているか否かを把握することができる。 13. In the above embodiment,
a sensor (for example, 16c) that detects the amount of water stored in the tank;
a notification unit (for example, 20) that notifies that the amount of water detected by the sensor has become below a threshold;
It further includes:
According to this configuration, the operator can grasp whether enough water is stored in the tank to circulate around the motor, that is, whether there is insufficient water to circulate around the motor. can do.
　１４．上記実施形態において、
　前記モータは、前後方向における前記ブレードの回転軸（例えばＡ）と前記車輪の回転軸（例えば１８ａ）との間に配置されている。
　この構成によれば、前後方向においてモータをタンクに近づけ、モータの周囲で水を循環させるための経路を短縮することができるため、効率よくモータを冷却することができる。 14. In the above embodiment,
The motor is disposed between the rotation axis of the blade (for example, A) and the rotation axis of the wheel (for example, 18a) in the front-rear direction.
According to this configuration, the motor can be brought closer to the tank in the front-rear direction, and the path for circulating water around the motor can be shortened, so that the motor can be efficiently cooled.
　１５．上記実施形態において、
　前記切断機は、作業者が把持するハンドル部（例えば１９）を有する手押し式の作業機である。
　この構成によれば、手押し式の切断機が提供される。 15. In the above embodiment,
The cutting machine is a hand-held working machine that has a handle portion (for example, 19) that is gripped by an operator.
According to this configuration, a hand-operated cutting machine is provided.
　発明は上記実施形態に制限されるものではなく、発明の精神及び範囲から離脱することなく、様々な変更及び変形が可能である。従って、発明の範囲を公にするために請求項を添付する。 The invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention. Therefore, the following claims are hereby appended to disclose the scope of the invention.
１０：切断機、１１：作業部、１１ａ：ブレード、１２：モータ、１３：バッテリ、１４：電力制御部、１５：動力伝達機構、１６：タンク、１７：機体、１８：車輪、１９：ハンドル部 10: cutting machine, 11: working section, 11a: blade, 12: motor, 13: battery, 14: power control section, 15: power transmission mechanism, 16: tank, 17: fuselage, 18: wheels, 19: handle section

Claims (15)

  1. 　円盤状のブレードを回転させながら構造物に押し当てることで前記構造物を切断する切断機であって、
    　車輪を有するとともに、前記ブレードを回転可能に支持する機体と、
    　前記ブレードを冷却するために前記ブレードに供給される水を貯留するタンクと、
    　前記ブレードを回転駆動するためのモータと、
    　を備え、
    　前記タンクに貯留された水を用いて前記モータを冷却する、ことを特徴とする切断機。     A cutting machine that cuts a structure by rotating a disc-shaped blade and pressing it against the structure,
    a machine body having wheels and rotatably supporting the blade;
    a tank for storing water supplied to the blade for cooling the blade;
    a motor for rotationally driving the blade;
    Equipped with
    A cutting machine characterized in that the motor is cooled using water stored in the tank.
  2. 　前記タンクに貯留された水を前記モータの周囲で循環させることにより前記モータを冷却する、ことを特徴とする請求項１に記載の切断機。 The cutting machine according to claim 1, wherein the motor is cooled by circulating water stored in the tank around the motor.
  3. 　前記タンクに貯留された水を前記モータの周囲で循環させるためのポンプを更に備える、ことを特徴とする請求項２に記載の切断機。 The cutting machine according to claim 2, further comprising a pump for circulating water stored in the tank around the motor.
  4. 　前記モータの動力を用いて、前記タンクに貯留された水を前記モータの周囲で循環させる、ことを特徴とする請求項２に記載の切断機。 The cutting machine according to claim 2, wherein water stored in the tank is circulated around the motor using the power of the motor.
  5. 　前記モータの少なくとも一部が前記タンクの内部に配置されている、ことを特徴とする請求項１に記載の切断機。 The cutting machine according to claim 1, wherein at least a portion of the motor is disposed inside the tank.
  6. 　前記タンクは、上下方向において前記ブレードより上方に配置されている、ことを特徴とする請求項１乃至５のいずれか１項に記載の切断機。 The cutting machine according to any one of claims 1 to 5, wherein the tank is arranged above the blade in a vertical direction.
  7. 　前記モータは、上下方向において前記モータの上端が前記ブレードの上端より高くなるように配置されている、ことを特徴とする請求項１乃至６のいずれか１項に記載の切断機。 The cutting machine according to any one of claims 1 to 6, wherein the motor is arranged such that the upper end of the motor is higher than the upper end of the blade in the vertical direction.
  8. 　前記モータは、前後方向において前記モータの前端が前記ブレードの前端より後方になるように配置されている、ことを特徴とする請求項１乃至７のいずれか１項に記載の切断機。 The cutting machine according to any one of claims 1 to 7, wherein the motor is arranged such that the front end of the motor is located behind the front end of the blade in the front-rear direction.
  9. 　前記モータは、前後方向において前記モータの前端が前記ブレードの回転軸より後方になるように配置されている、ことを特徴とする請求項１乃至８のいずれか１項に記載の切断機。 The cutting machine according to any one of claims 1 to 8, wherein the motor is arranged such that the front end of the motor is located behind the rotation axis of the blade in the front-rear direction.
  10. 　前記モータは、上下方向において前記モータの上端が前記タンクの下端より低くなるように配置されている、ことを特徴とする請求項１乃至９のいずれか１項に記載の切断機。 The cutting machine according to any one of claims 1 to 9, wherein the motor is arranged such that an upper end of the motor is lower than a lower end of the tank in the vertical direction.
  11. 　前記モータは、前記車輪の後端より前方に配置されている、ことを特徴とする請求項１乃至１０のいずれか１項に記載の切断機。 The cutting machine according to any one of claims 1 to 10, wherein the motor is disposed forward of the rear end of the wheel.
  12. 　前記モータは、側面視において、前記タンクの上端と前記ブレードの下端とを結ぶ直線を半径とする円の内側に配置されている、ことを特徴とする請求項１乃至１１のいずれか１項に記載の切断機。 12. The motor according to any one of claims 1 to 11, characterized in that, in side view, the motor is arranged inside a circle whose radius is a straight line connecting the upper end of the tank and the lower end of the blade. Cutting machine as described.
  13. 　前記タンクに貯留されている水量を検知するセンサと、
    　前記センサで検知された水量が閾値以下になったことを報知する報知部と、
    　を更に備える、ことを特徴とする請求項１乃至１２のいずれか１項に記載の切断機。     a sensor that detects the amount of water stored in the tank;
    a notification unit that notifies that the amount of water detected by the sensor has become below a threshold;
    The cutting machine according to any one of claims 1 to 12, further comprising:.
  14. 　前記モータは、前後方向における前記ブレードの回転軸と前記車輪の回転軸との間に配置されている、ことを特徴とする請求項１乃至１３のいずれか１項に記載の切断機。 The cutting machine according to any one of claims 1 to 13, wherein the motor is disposed between a rotation axis of the blade and a rotation axis of the wheel in the front-rear direction.
  15. 　前記切断機は、作業者が把持するハンドル部を有する手押し式の作業機である、ことを特徴とする請求項１乃至１４のいずれか１項に記載の切断機。 The cutting machine according to any one of claims 1 to 14, wherein the cutting machine is a hand-held working machine having a handle portion that is gripped by an operator.
PCT/JP2022/016125 2022-03-30 2022-03-30 Cutting machine WO2023188153A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58128008U (en) * 1982-02-23 1983-08-30 石原　将光 Cutting machine with cooling water circulation system
JP2000117521A (en) * 1998-10-09 2000-04-25 Hilti Ag Machining device
JP2008298358A (en) * 2007-05-31 2008-12-11 Diamond Electric Mfg Co Ltd Ultrasonic humidifier
WO2009108094A1 (en) * 2008-02-29 2009-09-03 Husqvarna Ab A saw for construction work
JP5883196B2 (en) * 2012-06-12 2016-03-09 フスクバルナ アクティエボラーグ Electric cutting system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58128008U (en) * 1982-02-23 1983-08-30 石原　将光 Cutting machine with cooling water circulation system
JP2000117521A (en) * 1998-10-09 2000-04-25 Hilti Ag Machining device
JP2008298358A (en) * 2007-05-31 2008-12-11 Diamond Electric Mfg Co Ltd Ultrasonic humidifier
WO2009108094A1 (en) * 2008-02-29 2009-09-03 Husqvarna Ab A saw for construction work
JP5883196B2 (en) * 2012-06-12 2016-03-09 フスクバルナ アクティエボラーグ Electric cutting system

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