Electric work machine and method for assembling motor to be mounted on electric work machine

Abstract

Provided is an electric work machine in which wear on the lead portion of the coil is suppressed. [Solution] The electric work machine includes a motor, a working unit, and a bundling unit. The motor includes a rotor and a stator. The stator includes a plurality of coils. Each of the plurality of coils includes a winding unit and two lead portions. The two lead portions extend from the winding unit. The bundling unit is configured to bundling at least two of the lead portions of the plurality of coils together.

Description

[Technical Field]

[0001] The present disclosure relates to an electric work machine equipped with a motor. [Background technology]

[0002] BACKGROUND ART An electric working machine including a motor and a working unit is known (Patent Document 1). The motor includes a rotor and a stator. The rotor includes a magnet. The stator is disposed adjacent to the rotor. The stator includes a plurality of coils. Each of the plurality of coils includes a winding portion and two lead portions. The winding portion is wound around the stator. The two lead portions each extend from the winding portion.

[0003] The working unit is configured to be driven by the rotor. The two leads each have an end configured to be electrically connected to a power source. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-031687 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the above-mentioned electric operating machine is provided with a large number of lead portions, and there is a possibility that the lead portions will rub against each other and become worn. If the surface of the lead portion wears out in this way, multiple coils may become electrically connected to each other in inappropriate locations, preventing appropriate current from flowing to each of the multiple coils, which may prevent the motor from operating normally.

[0006] Therefore, one aspect of the present disclosure is to provide an electric operating machine in which wear on the lead portion of the coil is suppressed. [Means for solving the problem]

[0007] In this disclosure, terms such as "first," "second," etc. are intended only to distinguish elements from one another and are not intended to limit the order or number of elements. Thus, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. In addition, a first element may be included without a second element, and similarly, a second element may be included without a first element.

[0008] One aspect of the present disclosure provides an electric work machine including a motor, a working unit, and a binding unit. The motor includes a rotor and a stator. The rotor includes a magnet. The stator is disposed adjacent to the rotor. The stator includes a plurality of coils. Each of the plurality of coils includes a winding portion. The winding portion is wound around the stator. Each of the plurality of coils includes two lead portions. The two lead portions extend from the winding portion.

[0009] The working unit is configured to be driven by the rotor. The bundling portion is configured to bundling together at least two of the lead portions of the coils.

[0010] In an electric operating machine configured in this manner, the lead portions bound by the binding portion are prevented from rubbing against each other, thereby reducing wear on the lead portions of the coil and improving the durability of the coil.

[0011] Another aspect of the present disclosure provides a method for manufacturing a motor to be mounted on an electric work machine. The method includes contacting at least two leads with a bundling section before bundling, the at least two leads being at least two of a plurality of leads for a plurality of coils of a motor, and further comprising bundling the bundling section with the at least two leads contacted.

[0012] By performing a bundling process on the bundling portion where at least two lead portions are in contact, the at least two lead portions are bound together by the bundling portion. The bundling process may include, for example, a heat treatment or a fusing process.

[0013] In an electric work machine equipped with a motor manufactured using this manufacturing method, the lead portions bound by the binding portion are prevented from rubbing against each other, thereby reducing wear on the lead portions of the coil. An electric work machine equipped with a motor manufactured using this method can improve the durability of the coil. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view illustrating the appearance of an electric operating machine according to a first embodiment. [Figure 2] FIG. 2 is a perspective view showing the motor and controller inside the electric working machine as viewed from above. [Figure 3] FIG. 3 is an exploded perspective view of the motor shown in FIG. 2. [Figure 4] FIG. 2 is a perspective view showing the motor as viewed from below. [Figure 5] FIG. 5 is an exploded perspective view of the motor shown in FIG. 4. [Figure 6] FIG. 2 is a cross-sectional view showing the motor cut along the rotation shaft. [Figure 7] FIG. 2 is a wiring diagram showing the connection state between a plurality of coils of a motor and a controller. [Figure 8] FIG. 3 is an explanatory diagram schematically showing the direction in which fusing terminals are drawn out from the motor in the first embodiment. [Figure 9]FIG. 10 is an explanatory diagram schematically showing the direction in which fusing terminals are drawn out from a motor in a second embodiment. [Figure 10] FIG. 11 is an explanatory diagram schematically showing the direction in which fusing terminals are drawn out from a motor in a third embodiment. [Figure 11] FIG. 10 is a wiring diagram showing a connection configuration between a plurality of coils of a motor and a plurality of connection points in a fourth embodiment. [Figure 12] FIG. 11 is a perspective view showing a second motor inside an electric working machine according to a fifth embodiment, as viewed from above. [Figure 13] FIG. 4 is an exploded perspective view of the second motor when viewed from above. [Figure 14] FIG. 4 is an exploded perspective view of the second motor when viewed from below. [Figure 15] FIG. 1 is a circuit diagram showing multiple coils connected in a Y-connection. [Figure 16] FIG. 1 is a wiring diagram showing a connection configuration of a motor in which a plurality of coils are connected in series. DETAILED DESCRIPTION OF THE INVENTION

[0015] [Summary of the embodiment] An embodiment may provide a power work machine (or power tool or power mechanical implement or field equipment) that includes at least one of the following:

[0016] Feature 1: A motor including a rotor and a stator. ·Feature 2: The rotor is equipped with a magnet. Feature 3: The stator is located adjacent to the rotor.

[0017] · Feature 4: The stator has multiple coils. Feature 5: Each of the multiple coils has a winding portion. Feature 6: The winding portion is wound on the stator.

[0018] Feature 7: Each of the multiple coils has two lead portions. Feature 8: Two lead sections extend from the winding section. ·Feature 9: A working unit configured to be driven by a rotor.

[0019] Feature 10: A bundling section configured to bundling together at least two lead sections among a plurality of lead sections of a plurality of coils. In an electric operating machine having at least Features 1 to 10, the lead portions bound by the binding portion are prevented from rubbing against each other, thereby reducing wear on the lead portions of the coil. This electric operating machine can improve the durability of the coil.

[0020] Each of the two lead portions may be made of the same material as the winding portion (e.g., wire). Alternatively, the lead portion may be configured to include a lead portion made of the same material as the winding portion (hereinafter also referred to as a basic lead portion) and a lead portion connected to the basic lead portion (hereinafter also referred to as a connection lead portion). The connection lead portion may be connected to the basic lead portion via a connection point. Furthermore, the connection lead portion may be connected to multiple basic lead portions via connection points.

[0021] Some embodiments may include at least one of the following in addition to or instead of at least one of Features 1 to 10 above. Feature 11: The binding portion has a tubular binding portion.

[0022] Feature 12: The tubular binding part is configured in a tubular shape so that at least two lead parts are inserted into the inside of the tubular binding part. In an electric work machine having at least features 1 to 12, at least two lead portions can be bound by a tubular binding portion, which prevents the lead portions from rubbing against each other, thereby reducing wear on the lead portions of the coil.

[0023] Some embodiments may include the following in addition to or instead of at least one of features 1 to 12 above. Feature 13: The tubular binding part is equipped with a heat shrink tube.

[0024] The heat-shrinkable tube is configured to shrink in size by undergoing a heat-shrinking treatment. The heat-shrinking treatment includes, for example, a heating treatment in which heat is applied to the heat-shrinkable tube. The heat-shrinkable tube may be formed in a cylindrical shape.

[0025] In an electric work machine having at least features 1 to 13, at least two lead portions can be bound together with a heat shrink tube, which prevents the lead portions from rubbing against each other, thereby reducing wear on the lead portions of the coil.

[0026] Some embodiments may include the following in addition to or instead of at least one of features 1 to 13 above. Feature 14: The binding portion includes a joint binding portion.

[0027] Feature 15: The joining tie is configured to join the ends of at least two lead portions together. In an electric work machine having at least features 1 to 15, at least two lead portions can be bound together by a joining and binding portion, which prevents the lead portions from rubbing against each other, thereby reducing wear on the lead portions of the coil.

[0028] Some embodiments may include the following in addition to or instead of at least one of features 1 to 15 above. Feature 16: The joint and binding part is equipped with a fusing terminal.

[0029] A fusing terminal is configured to join the ends of at least two lead portions together by a fusing process. The fusing process is a processing method in which the lead portion and the fusing terminal are thermocompression-bonded (diffusion-bonded) using electrical resistance. The fusing process is characterized by the fact that, by applying heat and pressure, the insulating coating of the lead portion can be stripped off and the lead portion and the fusing terminal can be crimped together at the same time. The fusing terminal may be configured using a crimp terminal. The lead portion may be provided with an insulating coating.

[0030] In an electric power tool having at least Features 1 to 16, the fusing terminal can connect at least two lead portions, preventing the lead portions from rubbing against each other and reducing wear on the lead portions of the coil. Furthermore, by performing the fusing process, it is no longer necessary to perform a separate process of removing the insulating coating from the lead portions, simplifying the motor manufacturing process.

[0031] Some embodiments may include the following in addition to or instead of at least one of features 1-16 above. Feature 17: The binding portion includes a tubular binding portion and a joint binding portion.

[0032] Feature 18: The tubular binding portion is configured in a tubular shape so that at least two lead portions are inserted into the inside of the tubular binding portion. Feature 19: The joining tie is configured to join the ends of at least two lead portions together.

[0033] In an electric operating machine having at least Features 1 to 19, at least two leads can be bound by each of a tubular binding part and a joint binding part. In this electric operating machine, the part of the lead bound by the tubular binding part and the part of the joint binding part can be different. This allows a larger area of ​​the lead to be bound, further reducing coil wear.

[0034] Some embodiments may include the following in addition to or instead of at least one of features 1-19 above. · Feature 20: The motor is a brushless motor.

[0035] In an electric work machine having at least features 1 to 20, at least two lead portions can be bound together by the binding portion, which prevents the lead portions from rubbing against each other, thereby reducing wear on the lead portions of the coil.

[0036] Some embodiments may include the following in addition to or instead of at least one of features 1-20 above. Feature 21: The stator has a number of coils that is an integer multiple of three as the plurality of coils.

[0037] In an electric operating machine having at least features 1 to 21, at least two lead portions can be bound together by the binding portion, and the lead portions are prevented from rubbing against each other, thereby reducing wear on the lead portions of the coil.

[0038] The stator may have, for example, nine coils, and the motor may have, for example, a 12-pole, 9-slot (12 magnets, 9 coils) configuration. Some embodiments may include the following in addition to or instead of at least one of Features 1-21 above.

[0039] Feature 22: The bundling section is configured to bundling the plurality of lead sections for each phase of the brushless motor. In an electric operating machine having at least Features 1 to 22, the lead portions of each phase of the brushless motor are prevented from rubbing against each other, thereby suppressing wear on the lead portions of the coil.

[0040] For example, the bundling section may be divided into bundling sections for each phase (U phase, V phase, W phase) of the motor. The bundling section may include a U-phase bundling section, a V-phase bundling section, and a W-phase bundling section for each phase (U phase, V phase, W phase) of the motor.

[0041] Some embodiments may include the following in addition to or instead of at least one of features 1-22 above. · Feature 23: Multiple coils are connected in a delta connection.

[0042] In an electric operating machine having at least Features 1 to 23, the lead portions of a plurality of coils connected in a delta connection are prevented from rubbing against each other, thereby suppressing wear on the lead portions of the coils.

[0043] Some embodiments may include the following in addition to or instead of at least one of features 1-23 above. · Feature 24: Multiple coils are connected in a Y-connection.

[0044] In an electric operating machine having at least Features 1 to 24, the lead portions of a plurality of coils connected in a Y-connection are prevented from rubbing against each other, thereby suppressing wear on the lead portions of the coils.

[0045] Some embodiments may include the following in addition to or instead of at least one of features 1-24 above. Feature 25: The binding portion includes a first binding portion and a second binding portion.

[0046] Feature 26: The first bundling portion is configured to bundling at least two lead portions together at a position of the lead portions close to the winding portion. Feature 27: The second binding section is configured to bind at least two of the lead sections bound by the first binding section and at least some of the other lead sections at a position farther from the winding section than the first binding section.

[0047] In an electric operating machine having at least Features 1 to 27, by providing a first bundling section and a second bundling section, it is not necessary to bundle all of the multiple leads at once. In other words, this electric operating machine can first bundling some of the multiple leads with the first bundling section, and then bundling at least some of the remaining multiple leads with the second bundling section. In other words, the multiple leads can be bound in stages. This allows the multiple leads to be bound at multiple locations, which ensures freedom in the routing of each of the multiple leads compared to bundling the multiple leads at a single location, while preventing the multiple leads from rubbing against each other and wearing out.

[0048] Some embodiments may include the following in addition to or instead of at least one of features 1-27 above. · Feature 28: All of the multiple lead sections from the motor are drawn in the same direction.

[0049] In an electric work machine having at least features 1 to 28, even if the direction in which multiple lead portions are pulled out from the motor is the same for all lead portions, the lead portions are prevented from rubbing against each other, thereby reducing wear on the lead portions of the coil.

[0050] Some embodiments may include the following in addition to or instead of at least one of features 1-28 above. Feature 29: The lead-out directions of the plurality of lead portions from the motor include a first direction and a second direction different from the first direction.

[0051] Feature 30: Some of the leads are drawn in the first direction. Feature 31: At least some of the lead portions that are not drawn in the first direction are drawn in the second direction.

[0052] In an electric work machine having at least features 1 to 31, even when the direction in which multiple lead portions are drawn out from the motor includes a first direction and a second direction, the lead portions are prevented from rubbing against each other, thereby reducing wear on the lead portions of the coil.

[0053] Some embodiments may include the following in addition to or instead of at least one of features 1 to 31 above. Feature 32: The lead-out directions of the plurality of lead portions from the motor further include a third direction different from the first direction and the second direction.

[0054] Feature 33: At least some of the leads that are not drawn in either the first or second direction are drawn in the third direction. In an electric work machine having at least features 1 to 33, even when the direction in which multiple lead portions are pulled out from the motor includes a third direction in addition to the first and second directions, the lead portions are prevented from rubbing against each other, thereby reducing wear on the lead portions of the coil.

[0055] Some embodiments may include the following in addition to or instead of at least one of features 1-33 above. Feature 34: The direction in which the multiple leads extend from the motor is perpendicular to the rotation axis of the motor rotor.

[0056] In an electric work machine having at least features 1 to 34, even when the direction in which multiple lead portions are pulled out from the motor is perpendicular to the rotation axis of the rotor, the lead portions are prevented from rubbing against each other, thereby reducing wear on the lead portions of the coil.

[0057] Some embodiments may include the following in addition to or instead of at least one of features 1-34 above. Feature 35: The direction in which the multiple leads extend from the motor is parallel to the rotation axis of the motor rotor.

[0058] In an electric work machine having at least features 1 to 35, even when the direction in which multiple lead portions are drawn out from the motor is parallel to the rotation axis of the rotor, the lead portions are prevented from rubbing against each other, thereby reducing wear on the lead portions of the coil.

[0059] Some embodiments may include the following in addition to or instead of at least one of features 1-35 above. Feature 36: The rotor is located outside the stator.

[0060] In an electric working machine having at least Features 1 to 36, even when the rotor is disposed outside the stator, the lead portions are prevented from rubbing against each other, thereby suppressing wear on the lead portions of the coil. A motor in which the rotor is disposed outside the stator is called an outer rotor type motor.

[0061] Some embodiments may include the following in addition to or instead of at least one of features 1-36 above. Feature 37: The rotor is located inside the stator.

[0062] In an electric working machine having at least Features 1 to 37, even when the rotor is disposed inside the stator, the lead portions are prevented from rubbing against each other, thereby suppressing wear on the lead portions of the coil. A motor in which the rotor is disposed inside the stator is an inner rotor type motor.

[0063] An embodiment may provide a method including at least one of the following: The method is a method for manufacturing a motor to be mounted on an electric work machine. Feature 38: At least two of the lead portions of the coils of the motor are brought into contact with the bundling portion before bundling.

[0064] Feature 39: A bundling process is performed on a bundling portion where at least two lead portions are in contact with each other. According to a method including at least Features 38 to 39, by performing a bundling process on the bundling part where at least two lead portions abut, the at least two lead portions are bound together by the bundling part. In an electric operating machine equipped with a motor manufactured by such a manufacturing method, the lead portions bound by the bundling part are prevented from rubbing against each other, thereby suppressing wear on the lead portions of the coil. An electric operating machine equipped with a motor manufactured by this method can improve the durability of the coil.

[0065] The bundling process may include, for example, a heat treatment or a fusing process. Examples of such motors include brushless motors (including brushless DC motors and / or brushless AC motors), brushed DC motors, AC motors, and stepper motors.

[0066] Examples of the above-mentioned electric work machines include various types of equipment configured to be used at work sites such as construction, manufacturing, gardening, and civil engineering, specifically, power tools for masonry, metalwork, and woodworking, power tools for gardening, power tools for improving the environment at work sites, fan vests, fan jackets, push carts, electrically assisted bicycles, and air pumps.

[0067] Examples of the power tools mentioned above include electric chainsaws, electric hand saws, electric blowers, electric hammers, electric hammer drills, electric drills, electric screwdrivers, electric wrenches, electric impact drivers, electric impact wrenches, electric grinders, electric circular saws, electric reciprocating saws, electric jigsaws, electric cutters, electric planers, electric nail guns (including tackers), electric hedge trimmers, electric lawn mowers, electric lawn clippers, electric brush cutters, electric cleaners, electric sprayers, electric spreaders, electric dust collectors, electric trowels, electric vibrators, electric rammers, electric compactors, electric pumps, electric pile drivers, electric concrete saws, electric screeds, and electric cut-off saws.

[0068] The above-mentioned examples of electric working machines may be in the form of battery-powered equipment configured to be powered by a battery. Specifically, the above-mentioned examples of electric working machines may have a built-in battery or may be configured to have a detachable battery pack attached. The battery pack houses the battery.

[0069] In some embodiments, the above features 1 to 39 may be combined in any manner. In some embodiments, any of the above features 1-39 may be omitted. Specific Exemplary Embodiments A specific exemplary embodiment will be described below. This specific exemplary embodiment provides an electric implement 1 in the form of an electric chainsaw. An electric chainsaw is a type of gardening tool. However, this electric implement 1 is merely an example, and the present disclosure may be applied to any form of electric implement.

[0070] [First embodiment] <Electric working equipment> As shown in Fig. 1, the electric work machine 1 includes a housing 2. The housing 2 is made of synthetic resin. The housing 2 accommodates a motor 6 therein. The housing 2 accommodates a controller 11 therein.

[0071] For ease of explanation, in this embodiment, the directions of "up," "down," "right," "left," "front," and "rear" are defined with the electric working machine 1 at the center, as shown in Figure 1 and subsequent figures. The electric working machine 1 is provided with a guide bar 9. The guide bar 9 is a plate-shaped member. The guide bar 9 protrudes from the housing 2 to the front of the electric working machine 1.

[0072] The electric work machine 1 is equipped with a saw chain 10. The saw chain 10 includes a plurality of cutters connected to one another. The saw chain 10 is removably attached to the periphery of a guide bar 9. The saw chain 10 is connected to a rotor shaft 50 (see FIG. 2) of the motor 6 via a power transmission mechanism (not shown). The power transmission mechanism includes a sprocket (not shown) configured to allow the saw chain 10 to be attached.

[0073] Therefore, when the motor 6 is driven, the saw chain 10 serving as a working part moves around the periphery of the guide bar 9. The electric work machine 1 can cut the workpiece with the moving saw chain 10.

[0074] The electric work machine 1 includes a battery mounting portion 5. In this embodiment, the battery mounting portion 5 protrudes upward from the rear of the housing 2. A battery pack 12 is removably mounted to the battery mounting portion 5. The battery pack 12 can be attached to the rear end face of the battery mounting portion 5. The battery pack 12 includes a secondary battery, for example, a rechargeable lithium-ion battery. When attached to the battery mounting portion 5, the battery pack 12 can supply power to the electric work machine 1. The controller 11 receives battery power from the battery pack 12. The controller 11 converts the battery power into three-phase power. The three-phase power includes a U phase, a V phase, and a W phase. The controller 11 supplies the three-phase power to the motor 6. In other words, the motor 6 receives power from the battery pack 12 via the controller 11 and is driven by it.

[0075] The electric working machine 1 is provided with a hand guard 4. The hand guard 4 protrudes upward from the front of the housing 2. The electric work machine 1 is provided with a side handle 3A and a top handle 3B behind the hand guard 4. One of the side handle 3A and the top handle 3B may be omitted. The side handle 3A and the top handle 3B are made of synthetic resin.

[0076] The side handle 3A is a pipe-shaped member that protrudes leftward from the left part of the housing 2. Therefore, the operator of the electric working machine 1 can grip the side handle 3A with his / her left hand from behind the electric working machine 1.

[0077] The top handle 3B protrudes upward from the top of the housing 2. The rear end of the top handle 3B is connected to the battery attachment section 5, which forms a space between the top handle 3B and the housing 2. Therefore, the operator can insert his or her fingers into this space to grip the top handle 3B.

[0078] The electric work machine 1 is provided with a trigger switch 7 below the top handle 3B. The trigger switch 7 is operated (for example, pulled) by the operator to drive the motor 6. When the trigger switch 7 is pulled upward by the operator, the motor 6 is driven. When the operation of the trigger switch 7 is released, the driving of the motor 6 is stopped.

[0079] The electric work machine 1 is provided with a trigger lock lever 8 above the top handle 3B. When the trigger lock lever 8 is pressed downward by the operator, operation of the trigger switch 7 is permitted.

[0080] <Motor> In this embodiment, the motor 6 is in the form of an outer rotor brushless motor. 2, 3, 4, 5, and 6, the motor 6 includes a rotor 20. The motor 6 includes a stator 30.

[0081] The rotor 20 is disposed on the outer periphery of the stator 30 and rotates around the stator 30 . The motor 6 includes a rotor shaft 50. The rotor shaft 50 is fixed to the rotor 20. The central axis of the rotor shaft 50 coincides with the rotation axis AX of the motor 6. Therefore, the rotor 20 and the rotor shaft 50 rotate about the rotation axis AX.

[0082] The motor 6 includes a sensor board 60. The sensor board 60 includes three magnetic sensors 62 that detect the rotation of the rotor 20. The motor 6 includes a stator base 40. The stator base 40 supports the stator 30 and the sensor board 60.

[0083] The motor 6 includes an insulating member 70. The insulating member 70 is disposed between the stator base 40 and the stator 30. The rotor shaft 50 passes through the rotor 20, the stator 30, the insulating member 70, and the stator base 40 and protrudes to the outside. The rotor shaft 50 has an output shaft 51. The output shaft 51 corresponds to a part of the rotor shaft 50 that includes a first end that protrudes to the outside from the stator base 40. The output shaft 51 is connected to a power transmission mechanism. The rotor shaft 50 moves the saw chain 10, which serves as a working unit, via the power transmission mechanism.

[0084] < Rotor > The rotor 20 includes a rotor cup 21. The rotor cup 21 is made of metal. Specifically, the rotor cup 21 contains aluminum, which is a non-magnetic material, as its main component.

[0085] The rotor cup 21 includes a plate portion 21A. The plate portion 21A has an annular shape. The plate portion 21A includes an opening 21C in its center. The rotor shaft 50 is inserted into the opening 21C and fixed therein. The rotor shaft 50 may be fixed to the rotor cup 21 by any method. In this embodiment, the rotor shaft 50 is press-fitted into the opening 21C and thereby fixed to the opening 21C (and thus to the rotor cup 21).

[0086] The rotor cup 21 includes a yoke portion 21B. The yoke portion 21B has a cylindrical shape. The yoke portion 21B surrounds the rotor shaft 50. The rotor cup 21 includes a plurality of fins 21D between the plate portion 21A and the yoke portion 21B. The yoke portion 21B is connected to the outer periphery of the plate portion 21A via the plurality of fins 21D. The plurality of fins 21D are arranged at equal intervals along the outer periphery of the plate portion 21A. The plurality of fins 21D rotate together with the plate portion 21A (in other words, the rotor 20), thereby generating wind. The wind cools the motor 6.

[0087] The rotor 20 includes a rotor core 22. The rotor core 22 includes a plurality of steel plates laminated in a direction along the rotation axis AX (hereinafter referred to as the "axial direction"). The rotor core 22 has a substantially cylindrical shape. The rotor core 22 is supported on the inner peripheral surface of the yoke portion 21B of the rotor cup 21.

[0088] The rotor 20 includes a plurality of magnets 23. Each of the plurality of magnets 23 is a permanent magnet. Each of the plurality of magnets 23 has a plate-like shape. In this embodiment, each of the plurality of magnets 23 is in the form of a sintered magnet. The plurality of magnets 23 are arranged on the inner peripheral surface of the rotor core 22 at intervals from one another along the circumferential direction. The plurality of magnets 23 are fixed to the inner peripheral surface of the rotor core 22, for example, by an adhesive. In this embodiment, the plurality of magnets 23 includes, for example, 12 magnets 23. The plurality of magnets 23 are arranged on the inner peripheral surface of the rotor core 22 so that north poles and south poles appear alternately along the circumferential direction.

[0089] < Stator > The stator 30 is disposed on the inner peripheral side of the rotor core 22. That is, the stator 30 is disposed so as to face the plurality of magnets 23 in the radial direction. The radial direction is a direction perpendicular to the rotation axis AX.

[0090] The stator 30 includes a stator core 31. The stator core 31 is made of electromagnetic steel. The stator core 31 includes a plurality of steel plates stacked in the axial direction. The stator core 31 includes a yoke 31A. The yoke 31A has a cylindrical shape. The yoke 31A is disposed around the rotor shaft 50 via a stator base 40. The central axis of the yoke 31A coincides with the rotation axis AX.

[0091] The stator core 31 includes a plurality of teeth 31B. The plurality of teeth 31B protrude radially outward from the outer peripheral surface of the yoke 31A. The plurality of teeth 31B are arranged at intervals along the circumferential direction. The plurality of teeth 31B are formed integrally with the yoke 31A. In this embodiment, the plurality of teeth 31B includes nine teeth 31B. A slot is formed between every two adjacent teeth 31B. In other words, the motor 6 of this embodiment is a 12-pole, 9-slot brushless motor.

[0092] The stator 30 includes an insulator 32. The insulator 32 is made of, for example, a synthetic resin. The insulator 32 covers at least a portion of the surface of the stator core 31.

[0093] The stator 30 includes a plurality of coils 33. Each of the plurality of coils 33 includes a wire. The wire is made of a conductive material (such as copper). An insulating coating is formed on the surface of the wire. The coil 33 includes a winding portion 33a and two lead portions 33b. The winding portion 33a is a portion of the wire that is wound around the tooth 31B. The two lead portions 33b are portions of the wire that extend from both ends of the winding portion 33a.

[0094] Specifically, the insulator 32 covers the coil mounting surface of each of the multiple teeth 31B and the outer peripheral surface of the yoke 31A. The winding portion 33a of a corresponding one of the multiple coils 33 is arranged on the coil mounting surface. The winding portion 33a and two lead portions 33b of each of the multiple coils 33 contact the outer peripheral surface of the yoke 31A. Therefore, the stator core 31 is insulated from the coils 33 by the insulator 32.

[0095] In this embodiment, the stator core 31 and the insulator 32 are integrally molded. The insulator 32 may be fixed to the stator core 31 by insert molding. Specifically, the stator core 31 and the insulator 32 may be formed as follows. First, the stator core 31 is placed in a mold. Next, heated and melted synthetic resin is injected into the mold. When the synthetic resin solidifies, the insulator 32 is integrated (i.e., fixed) to the stator core 31.

[0096] The stator 30 includes the above-described multiple coils 33. The winding portions 33a of the multiple coils 33 are provided on the multiple teeth 31B, respectively. That is, in this embodiment, the multiple coils 33 include nine coils 33. The wire constituting the winding portion 33a of the corresponding coil 33 is wound around each of the multiple teeth 31B. Therefore, multiple coils 33 are provided corresponding to the number of teeth 31B (nine in this embodiment). Note that, for each of the multiple teeth 31B, the coil mounting surface is covered with the insulator 32, but the tooth outer peripheral surface is not covered with the insulator 32. The tooth outer peripheral surface is the surface facing radially outward.

[0097] < Bearings > The motor 6 includes a plurality of bearings, which (i) have the rotor shaft 50 passing through them, and (ii) rotatably support the rotor shaft 50 (and thus the rotor 20).

[0098] In this embodiment, the plurality of bearings include a first bearing 54 and a second bearing 56. The first bearing 54 is fitted into a third support portion 41C (described later) of the stator base 40. The second bearing 56 is fitted into a first support portion 41A (described later) of the stator base 40.

[0099] In this embodiment, the first bearing 54 is in the form of a roller bearing (specifically a radial roller bearing, more specifically a needle roller bearing), and the second bearing 56 is in the form of a ball bearing (specifically a radial ball bearing).

[0100] <Stator base> The stator base 40 of this embodiment is made of aluminum. That is, the stator base 40 includes an aluminum alloy. In this embodiment, the stator base 40 is integrally formed of an aluminum alloy.

[0101] The stator base 40 includes a support portion 41. The rotor shaft 50 passes through the support portion 41 in the axial direction. The support portion 41 (i) has a cylindrical shape and (i) has a plurality of steps along the rotation axis AX. Specifically, the support portion 41 includes a first support portion 41A, a second support portion 41B, and a third support portion 41C, all of which have a cylindrical shape. The first support portion 41A is connected to the second support portion 41B along the rotation axis AX. The second support portion 41B is connected to the third support portion 41C along the rotation axis AX. The outer diameter of the second support portion 41B is larger than the outer diameter of the third support portion 41C. The outer diameter of the first support portion 41A is larger than the outer diameter of the second support portion 41B.

[0102] The first support portion 41A has an inner diameter large enough to fit the second bearing 56. The second support portion 41B has an outer diameter large enough to fit into the hollow portion of the insulator 32 and larger than the inner diameter of the hollow portion of the stator core 31 (more specifically, the hollow portion of the yoke 31A). The third support portion 41C has an inner diameter large enough to fit the first bearing 54 and an outer diameter large enough to be inserted into the hollow portion of the stator core 31.

[0103] 3 and 5 show a state in which the first and second bearings 54, 56 are inserted onto the rotor shaft 50. However, in reality, as will be described later, the first and second bearings 54, 56 are first fixed to the stator base 40. Thereafter, the rotor shaft 50 is inserted into the stator base 40 and is thereby supported by the first and second bearings 54, 56.

[0104] The first and second bearings 54, 56 may each be fixed to the stator base 40 in any manner. In this embodiment, the first bearing 54 is press-fitted into the third support portion 41C. In other words, the first bearing 54 is fixed to the third support portion 41C by a press-fitting method. The second bearing 56 is also press-fitted into the first support portion 41A in this embodiment. However, the first bearing 54 may be fixed to the third support portion 41C by a method other than a press-fitting method. The first bearing 54 may be fixed to the third support portion 41C by, for example, shrink fitting, cold fitting, or another method. The same applies to the second bearing 56.

[0105] The yoke 31A is fitted into the third support portion 41C, so that the stator base 40 supports the stator core 31 from its inner diameter side. The first bearing 54 is disposed so as to at least partially overlap with the stator core 31 and the rotor core 22 in the axial direction. The second bearing 56 does not overlap with the stator core 31 or the rotor core 22 in the axial direction.

[0106] When assembling the motor 6, the first bearing 54 and the second bearing 56 are fixed to the stator base 40. Thereafter, the rotor shaft 50 is inserted through the stator 30, the insulating member 70, and the stator base 40 in this order, and is thereby supported by the stator base 40 (more specifically, supported by the first and second bearings 54, 56). Therefore, the output shaft 51 of the motor 6 is supported by the first support portion 41A so as to be rotatable around the rotation axis AX.

[0107] The stator base 40 includes a fixed portion 42. The fixed portion 42 is integrally formed with the support portion 41. The fixed portion 42 includes a fixed portion main body 42A. The fixed portion main body 42A has a hollow disk shape. The fixed portion main body 42A is provided on the outer periphery of the first support portion 41A.

[0108] The fixed portion 42 includes a first fixed portion 42B, a second fixed portion 42C, and a third fixed portion 42D. Any one or two of the first fixed portion 42B, the second fixed portion 42C, and the third fixed portion 42D may be omitted.

[0109] The first fixed portion 42B, the second fixed portion 42C, and the third fixed portion 42D each protrude radially outward from the fixed portion main body 42A. The first fixed portion 42B, the second fixed portion 42C, and the third fixed portion 42D each have a screw hole SH at their tip portion. The tip portion corresponds to the end opposite the fixed portion main body 42A. A screw (not shown) is inserted into each screw hole SH. The motor 6 is fixed inside the housing 2 by the screws inserted into each of the three screw holes SH. Note that the fixed portion 42 may be indirectly attached to the housing 2. In other words, another object may be interposed between the fixed portion 42 and the housing 2.

[0110] Substrate fixing portion 42E is provided between first fixing portion 42B and second fixing portion 42C. Substrate fixing portion 42E fixes sensor substrate 60. Substrate fixing portion 42E has a shape corresponding to the shape of sensor substrate 60, specifically, an arc shape centered on rotation axis AX.

[0111] 3 and 5, the substrate fixing portion 42E has a first hole 43 and a first pin 43A at a first end thereof. The first pin 43A is inserted into the first hole 43. Specifically, in this embodiment, the first pin 43A is press-fitted into the first hole 43.

[0112] The substrate fixing portion 42E has a second hole 44 and a second pin 44A at its second end. The second pin 44A is inserted into the second hole 44. Specifically, in this embodiment, the second pin 44A is press-fitted into the second hole 44.

[0113] The first pin 43A is inserted into a third hole 65 in the sensor substrate 60. The second pin 44A is inserted into a fourth hole 66 in the sensor substrate 60. FIG. 2 shows the first pin 43A inserted into the third hole 65. In this embodiment, the first pin 43A and the second pin 44A are loosely fitted into the third hole 65 and the fourth hole 66, respectively. The first pin 43A and the second pin 44A position the sensor substrate 60 at a specified position relative to the stator base 40 (and therefore relative to the stator 30).

[0114] <Sensor board> The sensor board 60 has the third hole 65 and fourth hole 66 described above. The sensor board 60 has three magnetic sensors 62 that detect the rotational position of the rotor 20. Each of the three magnetic sensors 62 detects a change in the magnetic field that accompanies the rotation of the rotor 20 and outputs a detection signal corresponding to the detected change. The sensor board 60 is supported on the stator base 40 so that each of the three magnetic sensors 62 mounted on the sensor board 60 faces a corresponding one of the multiple magnets 23 in the axial direction. The sensor board 60 is disposed radially outward of the multiple coils 33.

[0115] The sensor board 60 includes a connection terminal 64. The connection terminal 64 is electrically connected to the three magnetic sensors 62. The connection terminal 64 is further electrically connected to the controller 11 via a signal line LS (see FIG. 7). The connection terminal 64 electrically connects the three magnetic sensors 62 to the controller 11. The controller 11 converts battery power into three-phase power based on detection signals and other information from the three magnetic sensors 62. The signal line LS is drawn from the sensor board 60 to the controller 11 and connected to the controller 11.

[0116] <Insulating materials> The insulating member 70 is made of synthetic resin. The insulating member 70 has a hollow disk shape. The inner hole of the insulating member 70 has an inner diameter large enough to insert the second support part 41B. The outer diameter of the insulating member 70 corresponds to (i.e., is equal to or close to) the outer diameter of an imaginary circle that follows the outer periphery of the winding parts 33a of the multiple coils 33. Therefore, when the stator 30 is viewed in the axial direction from the fixed part 42 side of the stator base 40, most or all of the winding parts 33a of the multiple coils 33 are hidden by the insulating member 70 and cannot be seen.

[0117] < Coils and leads > In this embodiment, the nine coils 33 are connected in a delta configuration. Specifically, as shown in FIG. 7 , the nine coils 33 include a first coil group 33UV, a second coil group 33VW, and a third coil group 33WU. The first coil group 33UV, the second coil group 33VW, and the third coil group 33WU each include three of the nine coils 33. The three coils 33 in the first coil group 33UV are connected in parallel between the U phase and the V phase of the three-phase power supplied from the controller 11. The three coils 33 in the second coil group 33VW are connected in parallel between the V phase and the W phase of the three-phase power supplied from the controller 11. The three coils 33 in the third coil group 33WU are connected in parallel between the W phase and the U phase of the three-phase power supplied from the controller 11. The first coil group 33UV, the second coil group 33VW, and the third coil group 33WU are connected in a delta configuration.

[0118] The motor 6 includes a lead group L. In this embodiment, the lead group L includes first to eighteenth lead portions L1 to L18. The first to eighteenth lead portions L1 to L18 are each formed by the lead portions 33b of a plurality of coils 33.

[0119] 7, in the coils 33 of the first coil group 33UV, the lead portions 33b extend as the first lead portion L1, the second lead portion L2, the seventh lead portion L7, the eighth lead portion L8, the thirteenth lead portion L13, and the fourteenth lead portion L14. In the coils 33 of the second coil group 33VW, the lead portions 33b extend as the third lead portion L3, the fourth lead portion L4, the ninth lead portion L9, the tenth lead portion L10, the fifteenth lead portion L15, and the sixteenth lead portion L16. In the coils 33 of the third coil group 33WU, the lead portions 33b extend as the fifth lead portion L5, the sixth lead portion L6, the eleventh lead portion L11, the twelfth lead portion L12, the seventeenth lead portion L17, and the eighteenth lead portion L18.

[0120] < Tube > 2 to 7, the motor 6 includes a first tube TBu, a second tube TBv, and a third tube TBw. As shown in Fig. 7, the motor 6 includes a U-phase first individual tube TBu1, a U-phase second individual tube TBu2, and a U-phase third individual tube TBu3. The motor 6 includes a V-phase first individual tube TBv1, a V-phase second individual tube TBv2, and a V-phase third individual tube TBv3. The motor 6 includes a W-phase first individual tube TBw1, a W-phase second individual tube TBw2, and a W-phase third individual tube TBw3.

[0121] The first tube TBu, the second tube TBv, the third tube TBw, the U-phase first to third individual tubes TBu1 to TBu3, the V-phase first to third individual tubes TBv1 to TBv3, and the W-phase first to third individual tubes TBw1 to TBw3 are each formed using heat-shrinkable tubing. The heat-shrinkable tubing is formed in a cylindrical shape. The heat-shrinkable tubing is configured to be reduced in size and shrink when subjected to a heat-shrinking treatment. The heat-shrinking treatment includes, for example, a heating treatment that applies heat to the heat-shrinkable tubing.

[0122] The U-phase first individual tube TBu1 is configured in a cylindrical shape with the first and sixth lead portions L1 and L6 inserted into the U-phase first individual tube TBu1. The U-phase second individual tube TBu2 is configured in a cylindrical shape with the seventh and twelfth lead portions L7 and L12 inserted into the U-phase second individual tube TBu2. The U-phase third individual tube TBu3 is configured in a cylindrical shape with the thirteenth and eighteenth lead portions L13 and L18 inserted into the U-phase third individual tube TBu3.

[0123] The V-phase first individual tube TBv1 is configured in a cylindrical shape with the second and third lead portions L2 and L3 inserted into the V-phase first individual tube TBv1. The V-phase second individual tube TBv2 is configured in a cylindrical shape with the eighth and ninth lead portions L8 and L9 inserted into the V-phase second individual tube TBv2. The V-phase third individual tube TBv3 is configured in a cylindrical shape with the fourteenth and fifteenth lead portions L14 and L15 inserted into the V-phase third individual tube TBv3.

[0124] The W-phase first individual tube TBw1 is configured in a cylindrical shape with the fourth and fifth lead portions L4 and L5 inserted into the W-phase first individual tube TBw1. The W-phase second individual tube TBw2 is configured in a cylindrical shape with the tenth and eleventh lead portions L10 and L11 inserted into the W-phase second individual tube TBw2. The W-phase third individual tube TBw3 is configured in a cylindrical shape with the sixteenth and seventeenth lead portions L16 and L17 inserted into the W-phase third individual tube TBw3.

[0125] The first tube TBu is shaped like a cylinder, and the first, sixth, seventh, twelfth, thirteenth, and eighteenth lead portions L1, L6, L7, L12, L13, and L18 are inserted into the first tube TBu. That is, the first tube TBu bundles six lead portions of the lead group L that are bundled by the U-phase first individual tube TBu1, the U-phase second individual tube TBu2, and the U-phase third individual tube TBu3.

[0126] The second tube TBv is shaped like a cylinder, and the second, third, eighth, ninth, fourteenth, and fifteenth lead portions L2, L3, L8, L9, L14, and L15 are inserted into the second tube TBv. That is, the second tube TBv bundles six lead portions of the lead group L that are bundled by the V-phase first individual tube TBv1, the V-phase second individual tube TBv2, and the V-phase third individual tube TBv3.

[0127] The third tube TBw is shaped like a cylinder, and the fourth, fifth, tenth, eleventh, sixteenth, and seventeenth lead portions L4, L5, L10, L11, L16, and L17 are inserted into the third tube TBw. That is, the third tube TBw bundles six lead portions of the lead group L that are bundled by the W-phase first individual tube TBw1, the W-phase second individual tube TBw2, and the W-phase third individual tube TBw3.

[0128] The bundling process for bundling the first, sixth, seventh, twelfth, thirteenth, and eighteenth lead portions L1, L3, L7, L12, L13, and L18 using the first tube TBu, the U-phase first individual tube TBu1, the U-phase second individual tube TBu2, and the U-phase third individual tube TBu3 is performed as follows: The bundling process can be performed as one step in the motor manufacturing method.

[0129] In the bundling process, first, a contact process is performed in which the first and sixth lead portions L1, L4 are brought into contact with the U-phase first individual tube TBu1. Here, as the contact process, an insertion process is performed in which the first and fourth lead portions L1, L4 are inserted into the cylindrical interior of the U-phase first individual tube TBu1. At this time, the U-phase first individual tube TBu1 has not yet been subjected to a heat shrinking process. Prior to the heat shrinking process, the U-phase first individual tube TBu1 has a cylindrical inner diameter large enough to allow the first and fourth lead portions L1, L4 to be inserted therethrough.

[0130] Next, as a bundling process, the U-phase first individual tube TBu1 through which the first and fourth lead portions L1, L4 are inserted is subjected to a heat treatment. This heat treatment corresponds to a heat shrinking process for shrinking a heat shrink tube. As a result, the first and fourth lead portions L1, L4 are bundled by the shrunken U-phase first individual tube TBu1.

[0131] By performing a similar bundling process for the U-phase second individual tube TBu2 and the U-phase third individual tube TBu3, the seventh and twelfth lead portions L7 and L12 and the thirteenth and eighteenth lead portions L13 and L18 can be bound together. After that, by performing a similar bundling process for the first tube TBu, the first, sixth, seventh, twelfth, thirteenth, and eighteenth lead portions L1, L3, L7, L12, L13, and L18 can be bound together.

[0132] By performing a similar bundling process for the second tube TBv, the V-phase first individual tube TBv1, the V-phase second individual tube TBv2, the V-phase third individual tube TBv3, and the third tube TBw, the W-phase first individual tube TBw1, the W-phase second individual tube TBw2, and the W-phase third individual tube TBw3, multiple lead portions can be bundled together as shown in Figure 7.

[0133] <Fusing terminal> As shown in Figures 2 to 7, the motor 6 includes a first fusing terminal 35U, a second fusing terminal 35V, and a third fusing terminal 35W. The first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W are each configured using a crimp terminal. The crimp terminal in this embodiment is cylindrical. The crimp terminal may have one end formed in a cylindrical shape and the other end formed in a non-cylindrical shape.

[0134] As shown in FIG. 7, the first fusing terminal 35U joins the respective ends of the first lead portion L1, the sixth lead portion L6, the seventh lead portion L7, the twelfth lead portion L12, the thirteenth lead portion L13, and the eighteenth lead portion L18. The first fusing terminal 35U corresponds to the U phase. The second fusing terminal 35V joins the respective ends of the second lead portion L2, the third lead portion L3, the eighth lead portion L8, the ninth lead portion L9, the fourteenth lead portion L14, and the fifteenth lead portion L15. The second fusing terminal 35V corresponds to the V phase. The third fusing terminal 35W joins the respective ends of the fourth lead portion L4, the fifth lead portion L5, the tenth lead portion L10, the eleventh lead portion L11, the sixteenth lead portion L16, and the seventeenth lead portion L17. The third fusing terminal 35W corresponds to the W-phase. That is, the motor 6 is configured so that the lead portion 33b of the coil 33 is connected directly to the fusing terminals (35U, 35V, 35W) without passing through any other member.

[0135] The first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W are each configured to join a plurality of lead portions among the first to eighteenth lead portions L1 to L18 by fusing. The fusing process is a processing method that uses electrical resistance to perform thermocompression bonding (diffusion bonding) between a wire and a terminal. The fusing process is characterized by the fact that it can peel off the insulating coating of the first to eighteenth lead portions L1 to L18 and simultaneously crimp the lead portions and terminals by applying heat and pressure.

[0136] The bundling process for bundling the first, sixth, seventh, twelfth, thirteenth, and eighteenth lead portions L1, L6, L7, L12, L13, and L18 using the first fusing terminal 35U is performed as follows: The bundling process can be performed as one step in the motor manufacturing method.

[0137] In the bundling process, first, a contact process is performed in which the ends of the first, sixth, seventh, twelfth, thirteenth, and eighteenth lead portions L1, L6, L7, L12, L13, and L18 are contacted with the first fusing terminal 35U. Here, as the contact process, a placement process is performed in which the ends of the first, sixth, seventh, twelfth, thirteenth, and eighteenth lead portions L1, L6, L7, L12, L13, and L18 are placed inside the cylindrical first fusing terminal 35U. At this time, the first fusing terminal 35U is in a state where the fusing process has not yet been performed. Prior to the fusing process, the cylindrical inner diameter of the first fusing terminal 35U is configured to be large enough to accommodate the first, sixth, seventh, twelfth, thirteenth, and eighteenth lead portions L1, L6, L7, L12, L13, and L18.

[0138] Next, as a bundling process, a fusing process is performed on the first fusing terminal 35U on which the first, sixth, seventh, twelfth, thirteenth, and eighteenth lead portions L1, L6, L7, L12, L13, and L18 are arranged. As a result, the insulating coatings of the first, sixth, seventh, twelfth, thirteenth, and eighteenth lead portions L1, L6, L7, L12, L13, and L18 are stripped, and the first fusing terminal 35U and the first, sixth, seventh, twelfth, thirteenth, and eighteenth lead portions L1, L6, L7, L12, L13, and L18 are crimped together. As a result, the first, sixth, seventh, twelfth, thirteenth, and eighteenth lead portions L1, L6, L7, L12, L13, and L18 are bundled by the first fusing terminal 35U.

[0139] By carrying out a similar bundling process for the second fusing terminal 35V and the third fusing terminal 35W, it is possible to bundle a plurality of lead portions. The first to third fusing terminals 35U, 35V, and 35W are electrically connected to the controller 11. The controller 11 converts the battery power received from the battery pack 12 into three-phase power based on the detection signals from the three magnetic sensors 62 and other information. The controller 11 supplies the three-phase power to the motor 6 via the first to third fusing terminals 35U, 35V, and 35W, thereby driving the motor 6.

[0140] <Technical Effects of the Embodiments> According to the embodiment described above, the following technical effects are achieved. In the electric operating machine 1, the first to eighteenth lead portions L1 to L18 bound by the first tube TBu, the second tube TBv, the third tube TBw, the first to third U-phase individual tubes TBu1 to TBu3, the first to third V-phase individual tubes TBv1 to TBv3, and the first to third W-phase individual tubes TBw1 to TBw3 are prevented from rubbing against each other, thereby reducing wear on the coil 33. Therefore, the electric operating machine 1 can improve the durability of the coil 33.

[0141] The first tube TBu, the second tube TBv, the third tube TBw, the U-phase first to third individual tubes TBu1 to TBu3, the V-phase first to third individual tubes TBv1 to TBv3, and the W-phase first to third individual tubes TBw1 to TBw3 are configured to cover the first to eighteenth lead portions L1 to L18, thereby suppressing not only damage caused by contact between the lead portions but also damage to the first to eighteenth lead portions L1 to L18 caused by contact with other components.

[0142] In the electric operating machine 1, the first to eighteenth lead portions L1 to L18 bound by the first fusing terminal 35U, the second fusing terminal 35V and the third fusing terminal 35W are prevented from rubbing against each other, thereby suppressing wear of the coil 33.

[0143] By performing a fusing process to join the first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W to the first to eighteenth lead portions L1 to L18, the process of removing the insulating coating from the first to eighteenth lead portions L1 to L18 (hereinafter also referred to as the insulating coating removal process) can be omitted. Therefore, by performing the fusing process, it is not necessary to perform the insulating coating removal process separately, and the manufacturing process of the motor 6 can be simplified.

[0144] In the electric operating machine 1, the bundling locations of the first to third tubes TBu-TBw, the bundling locations of the U-phase first to third individual tubes TBu1-TBu3, the bundling locations of the V-phase first to third individual tubes TBv1-TBv3, the bundling locations of the W-phase first to third individual tubes TBw1-TBw3, and the bundling locations of the first to third fusing terminals 35U-35W are all different from one another. This allows a larger area to be bound in the first to eighteenth lead portions L1-L18, further reducing wear on the coil 33.

[0145] The motor 6 of the first embodiment does not have a configuration (e.g., connection points) for connecting the lead portions 33b between the multiple coils 33 and the first to third fusing terminals 35U to 35W. Therefore, in the manufacturing process of the motor 6, the connection work for connecting the lead portions 33b of different coils 33 at connection points does not need to be performed in a narrow space where various motor components are crowded together. Furthermore, the connection work between the lead portions 33b of the coils 33 and the fusing terminals (35U, 35V, 35W) can be performed in a wide space away from the various motor components. Therefore, a motor 6 with this configuration can reduce the complexity of the connection work in the manufacturing process of the motor.

[0146] The electric operating machine 1 is also characterized by including U-phase first to third individual tubes TBu1 to TBu3, V-phase first to third individual tubes TBv1 to TBv3, and W-phase first to third individual tubes TBw1 to TBw3. These characteristics allow the first to eighteenth leads L1 to L18 to be bundled at multiple locations along the installation path, compared to a configuration that includes only the first tube TBu, the second tube TBv, and the third tube TBw as heat-shrinkable tubes. Therefore, compared to bundling the first to eighteenth leads L1 to L18 at one location, it is possible to bundle the leads along installation paths that are appropriate for each of the leads, ensuring flexibility in the installation path while preventing the leads from rubbing against each other and wearing out.

[0147] The first to third tubes TBu to TBw, the first to third U-phase individual tubes TBu1 to TBu3, the first to third V-phase individual tubes TBv1 to TBv3, the first to third W-phase individual tubes TBw1 to TBw3, and the first to third fusing terminals 35U to 35W bundle the first to eighteenth leads L1 to L18 separately for the U, V, and W phases of the motor 6. This makes it possible to prevent the leads of the same phase laid along the same route from rubbing against each other when the multiple leads of the motor 6 are laid separately for each phase.

[0148] The motor 6 includes a stator 30 having nine coils 33. The stator 30 includes a plurality of coils 33, the number of which is an integer multiple of three. In other words, the motor 6 is configured to be driven by a supply of three-phase power. The motor 6 includes first to third tubes TBu to TBw, U-phase first to third individual tubes TBu1 to TBu3, V-phase first to third individual tubes TBv1 to TBv3, W-phase first to third individual tubes TBw1 to TBw3, and first to third fusing terminals 35U to 35W. By bundling the first to eighteenth lead portions L1 to L18 for each phase, wear on the lead portions can be suppressed and the durability of the coils 33 can be improved.

[0149] <Terminology correspondence> The saw chain 10 corresponds to an example of a working unit in the generalization of the embodiment. The two lead portions 33b and the lead group L correspond to an example of the two lead portions in the summary of the embodiment.

[0150] The first tube TBu, the second tube TBv, the third tube TBw, the U-phase first to third individual tubes TBu1 to TBu3, the V-phase first to third individual tubes TBv1 to TBv3, and the W-phase first to third individual tubes TBw1 to TBw3 correspond to an example of a bundling section and a tubular bundling section in general terms in the embodiments. The first tube TBu, the second tube TBv, and the third tube TBw correspond to an example of a second bundling section in general terms in the embodiments. The U-phase first to third individual tubes TBu1 to TBu3, the V-phase first to third individual tubes TBv1 to TBv3, and the W-phase first to third individual tubes TBw1 to TBw3 correspond to an example of a first bundling section in general terms in the embodiments. The first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W correspond to an example of a bundling section and a joint bundling section in general terms in the embodiments.

[0151] [Second embodiment] The electric operating machine 1 of the second embodiment has the same basic configuration as the electric operating machine of the first embodiment, and differs from the first embodiment in the direction in which the lead group L is drawn from the motor 6 (in other words, the direction in which the first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W are drawn). Therefore, in the second embodiment, the configuration related to the direction in which the lead group L is drawn from the motor 6 will be described in detail. Note that in the second embodiment, configurations similar to those in the first embodiment will be described using the same reference numerals.

[0152] First, in the electric operating machine 1 of the first embodiment, the first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W are all drawn out in the same direction from the motor 6, as shown in Figures 2 to 6. Specifically, the directions in which the first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W are drawn out from the motor 6 are all perpendicular to the rotation axis AX of the rotor 20 of the motor 6, and are the same in the radially outward circumferential direction about the rotation axis AX. This can be schematically represented as shown in Figure 8.

[0153] In contrast, in the electric operating machine 1 of the second embodiment, as shown in Fig. 9, the directions in which the first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W extend from the motor 6 are all perpendicular to the rotation axis AX of the rotor 20 of the motor 6, as in the first embodiment. However, in the second embodiment, the directions in which the first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W extend from the motor 6 are different from each other in the circumferential direction, that is, radially outward from the rotation axis AX. Specifically, the directions in which the first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W extend are different from each other by 120° in the circumferential direction around the rotation axis AX.

[0154] In this way, the directions in which the first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W are pulled out from the motor 6 are different from each other, which increases the degree of freedom when setting the current paths for the U phase, V phase, and W phase.

[0155] The respective extension directions of the first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W are not limited to being different directions at equal intervals (120° each) in the circumferential direction around the rotation axis AX. That is, the angle between the respective extension directions of the first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W may be set to any angle. For example, the angle between the first fusing terminal 35U and the second fusing terminal 35V may be set to 90°, the angle between the second fusing terminal 35V and the third fusing terminal 35W may be set to 90°, and the angle between the first fusing terminal 35U and the third fusing terminal 35W may be set to 180°.

[0156] [Third embodiment] The electric operating machine 1 of the third embodiment has the same basic configuration as the electric operating machine of the first embodiment, but differs from the first embodiment in the direction in which the lead group L is drawn from the motor 6 (in other words, the direction in which the first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W are drawn). Therefore, in the third embodiment, the configuration relating to the direction in which the lead group L is drawn from the motor 6 will be described in detail.

[0157] In the electric work machine 1 of the third embodiment, as shown schematically in Figure 10, the directions in which the first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W are pulled out from the motor 6 are all parallel to the rotation axis AX of the rotor 20 of the motor 6.

[0158] By adopting such a configuration, even if it is difficult to pull out the first to third fusing terminals 35U to 35W perpendicular to the rotation axis AX due to restrictions in the surrounding environment of the motor 6, it is possible to provide current paths for each of the U phase, V phase, and W phase.

[0159] [Fourth embodiment] The electric operating machine 1 of the fourth embodiment has the same basic configuration as the electric operating machine of the first embodiment, but differs from the first embodiment in that the motor 6 is provided with 21st to 29th lead portions L21 to L29 and 1st to 9th connection points P1 to P9, as shown in Fig. 11. In other words, the fourth embodiment is provided with 21st to 29th lead portions L21 to L29 and 1st to 9th connection points P1 to P9 between nine coils 33 and fusing terminals (first fusing terminal 35U, second fusing terminal 35V, third fusing terminal 35W). Furthermore, the electric operating machine 1 of the fourth embodiment differs from the first embodiment in the number of heat-shrinkable tubes used as bundling portions.

[0160] < Coil, connection point > 11, the nine coils 33 of the fourth embodiment include a first coil group 33UV, a second coil group 33VW, and a third coil group 33WU, similar to the first embodiment. Each of the first coil group 33UV, the second coil group 33VW, and the third coil group 33WU includes three coils 33 out of the nine coils 33.

[0161] As in the first embodiment, the motor 6 of the fourth embodiment includes a lead group L. As in the first embodiment, the lead group L of the fourth embodiment includes first to eighteenth lead portions L1 to L18.

[0162] 11, the motor 6 of the fourth embodiment has first to ninth connection points P1 to P9. The first to ninth connection points P1 to P9 correspond to connection points between the lead portions 33b of two different coils 33. The first, fourth, and seventh connection points P1, P4, and P7 correspond to the U phase. The second, fifth, and eighth connection points P2, P5, and P8 correspond to the V phase. The third, sixth, and ninth connection points P3, P6, and P9 correspond to the W phase.

[0163] The first connection point P1 is connected to the first lead portion L1 and the sixth lead portion L6. The second connection point P2 is connected to the second lead portion L2 and the third lead portion L3. The third connection point P3 is connected to the fourth lead portion L4 and the fifth lead portion L5. The fourth connection point P4 is connected to the seventh lead portion L7 and the twelfth lead portion L12. The fifth connection point P5 is connected to the eighth lead portion L8 and the ninth lead portion L9. The sixth connection point P6 is connected to the tenth lead portion L10 and the eleventh lead portion L11. The seventh connection point P7 is connected to the thirteenth lead portion L13 and the eighteenth lead portion L18. The eighth connection point P8 is connected to the fourteenth lead portion L14 and the fifteenth lead portion L15. The ninth connection point P9 is connected to the sixteenth lead portion L16 and the seventeenth lead portion L17.

[0164] The lead group L of the motor 6 of the fourth embodiment includes 21st to 29th lead portions L21 to L29 in addition to 1st to 18th lead portions L1 to L18. Each of the 21st to 29th lead portions L21 to L29 is, for example, in the form of a flexible lead wire. Each of the 21st to 29th lead portions L21 to L29 is made of a conductive material (for example, copper). Each of the 21st to 29th lead portions L21 to L29 has an insulating coating formed on its surface. Each of the 21st to 29th lead portions L21 to L29 includes a first end that is one end of the lead portion and a second end that is the other end.

[0165] The first connection point P1 is connected to a first end of the 21st lead portion L21. The second connection point P2 is connected to a first end of the 22nd lead portion L22. The third connection point P3 is connected to a first end of the 23rd lead portion L23. The fourth connection point P4 is connected to a first end of the 24th lead portion L24. The fifth connection point P5 is connected to a first end of the 25th lead portion L25. The sixth connection point P6 is connected to a first end of the 26th lead portion L26. The seventh connection point P7 is connected to a first end of the 27th lead portion L27. The eighth connection point P8 is connected to a first end of the 28th lead portion L28. The ninth connection point P9 is connected to a first end of the 29th lead portion L29.

[0166] As described above, the motor 6 of the fourth embodiment differs from the first embodiment in that it includes 21st to 29th lead portions L21 to L29 and 1st to 9th connection points P1 to P9. However, the motor 6 of the fourth embodiment is similar to the first embodiment in that the first coil group 33UV, the second coil group 33VW, and the third coil group 33WU are delta-connected in terms of the overall electrical connection configuration. The motor 6 of the fourth embodiment is also similar to the first embodiment in that the nine coils 33 are electrically connected to the first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W.

[0167] < Tube > The electric working machine 1 of the fourth embodiment differs from the first embodiment in that it is equipped with a fourth tube TBua, a fifth tube TBva, and a sixth tube TBwa instead of the U-phase first to third individual tubes TBu1 to TBu3, the V-phase first to third individual tubes TBv1 to TBv3, and the W-phase first to third individual tubes TBw1 to TBw3.

[0168] The fourth tube TBua, the fifth tube TBva, and the sixth tube TBwa are each formed using a heat-shrinkable tube. The fourth tube TBua is shaped like a cylinder, allowing the 24th and 27th lead portions L24 and L27 to be inserted into the fourth tube TBua. The fourth tube TBua bundles the 24th and 27th lead portions L24 and L27 in regions of the 24th and 27th lead portions L24 and L27 that are closer to the fourth and seventh connection points P4 and P7 than the first tube TBu. In other words, the leads related to the U phase (the 21st, 24th, and 27th lead portions L21, L24, and L27) are bundled by the first tube TBu and the fourth tube TBua.

[0169] The fourth tube TBua bundles the 24th and 27th lead portions L24, L27 together at a position among the 24th and 27th lead portions L24, L27 that is closer to the winding portion 33a of the coil 33. The first tube TBu bundles the 24th and 27th lead portions L24, L27 and the 21st lead portion L21 at a position among the 24th and 27th lead portions L24, L27 that is farther from the winding portion 33a of the coil 33 than the fourth tube TBua.

[0170] The fifth tube TBva is shaped like a cylinder, allowing the 25th and 28th lead portions L25 and L28 to be inserted into the fifth tube TBva. The fifth tube TBva bundles the 25th and 28th lead portions L25 and L28 in regions of the 25th and 28th lead portions L25 and L28 that are closer to the 5th and 8th connection points P5 and P8 than the second tube TBv. In other words, the V-phase lead portions (the 22nd, 25th, and 28th lead portions L22, L25, and L28) are bundled by the second tube TBv and the fifth tube TBva.

[0171] The fifth tube TBva bundles the 25th and 28th lead portions L25, L28 together at a position among the 25th and 28th lead portions L25, L28 that is closer to the winding portion 33a of the coil 33. The second tube TBv bundles the 25th and 28th lead portions L25, L28 and the 22nd lead portion L22 at a position among the 25th and 28th lead portions L25, L28 that is farther from the winding portion 33a of the coil 33 than the fifth tube TBva.

[0172] The sixth tube TBwa is shaped like a cylinder, allowing the 26th and 29th lead portions L26, L29 to be inserted into the sixth tube TBwa. The sixth tube TBwa bundles the 26th and 29th lead portions L26, L29 in regions of the 26th and 29th lead portions L26, L29 that are closer to the sixth and ninth connection points P6, P9 than the third tube TBw. In other words, the leads related to the W phase (the 23rd, 26th, and 29th lead portions L23, L26, and L29) are bundled by the third tube TBw and the sixth tube TBwa.

[0173] The sixth tube TBwa bundles the 26th and 29th lead portions L26, L29 together at a position among the 26th and 29th lead portions L26, L29 that is closer to the winding portion 33a of the coil 33. The third tube TBw bundles the 26th and 29th lead portions L26, L29 and the 23rd lead portion L23 at a position among the 26th and 29th lead portions L26, L29 that is farther from the winding portion 33a of the coil 33 than the sixth tube TBwa.

[0174] <Technical Effects of the Embodiments> According to the fourth embodiment described above, the following technical effects are achieved. The fourth embodiment includes 21st to 29th lead portions L21 to L29 and 1st to 9th connection points P1 to P9, so the number of lead portions connected to the fusing terminals (first fusing terminal 35U, second fusing terminal 35V, third fusing terminal 35W) can be reduced. Reducing the number of lead portions connected to the fusing terminals reduces the workload of connecting the lead portions to the fusing terminals. Furthermore, reducing the number of lead portions connected to the fusing terminals reduces the workload of laying the lead portions from the coil 33 to the fusing terminals. Furthermore, reducing the number of lead portions connected to the fusing terminals allows the motor 6 to be made smaller.

[0175] <Terminology correspondence> The first tube TBu, the second tube TBv, the third tube TBw, the fourth tube TBua, the fifth tube TBva, and the sixth tube TBwa correspond to examples of a bundling section and a tubular bundling section in the general summary of the embodiment. The first tube TBu, the second tube TBv, and the third tube TBw correspond to an example of a second bundling section in the general summary of the embodiment. The fourth tube TBua, the fifth tube TBva, and the sixth tube TBwa correspond to an example of a first bundling section in the general summary of the embodiment.

[0176] [Fifth embodiment] The electric working machine 1 of the fifth embodiment differs from the electric working machine of the first embodiment in the form of the motor. That is, the motor 6 of the first embodiment is configured using an outer rotor type brushless motor, but in the present disclosure, it may be configured using an inner rotor type brushless motor, like the second motor 106 of the fifth embodiment.

[0177] As shown in Figures 12, 13, and 14, the second motor 106 includes a rotor 120 and a stator 130. The rotor 120 is configured to rotate inside the stator 130. The rotor 120 rotates around a rotation axis AX. The stator 130 is disposed around the rotor 120.

[0178] The stator 130 includes a stator core 131, a first insulator 132, a coil 133, and a second insulator 134. The first insulator 132 and the second insulator 134 may be fixed to the stator core 131 by integral molding.

[0179] The stator core 131 includes a plurality of stacked steel plates. The steel plates are made of a metal whose main component is iron. The stator core 131 is cylindrical. The stator core 131 has a plurality of teeth 131T that support the coils 133. The teeth 131T protrude radially inward from the inner surface of the stator core 131. In the fifth embodiment, six teeth 131T are provided.

[0180] The first insulator 132 is an electrical insulating member made of synthetic resin. The first insulator 132 is fixed to the left side of the stator core 131 (the direction indicated by the arrow "left" in FIG. 12). The first insulator 132 is cylindrical. The first insulator 132 has a plurality of protrusions 132T that support the coils 133. The protrusions 132T protrude radially inward from the inner surface of the first insulator 132. In the fifth embodiment, six protrusions 132T are provided.

[0181] The second insulator 134 is an electrical insulating member made of synthetic resin. The second insulator 134 is fixed to the right side of the stator core 131 (the direction indicated by the arrow "right" in FIG. 12). The second insulator 134 is cylindrical. The second insulator 134 has a plurality of protrusions 134T that support the coils 133. The protrusions 134T protrude radially inward from the inner surface of the second insulator 134. In the fifth embodiment, six protrusions 134T are provided.

[0182] The left end of the tooth 131T is connected to the right end of the protrusion 132T, and the right end of the tooth 131T is connected to the left end of the protrusion 134T. The coils 133 are wound around the teeth 131T of the stator core 131 via the first insulator 132 and the second insulator 134. A plurality of coils 133 are provided. In the fifth embodiment, six coils 133 are provided. The coils 133 are wound around each of the plurality of teeth 131T via the protruding portions 132T and the protruding portions 134T. The coils 133 are arranged around the teeth 131T, the protruding portions 132T, and the protruding portions 134T. The coils 133 and the stator core 131 are insulated by the first insulator 132 and the second insulator 134.

[0183] Each of the multiple coils 133 includes a wire similar to the coil 33 of the first embodiment. The wire is made of a conductive material (e.g., copper, etc.). An insulating coating is formed on the surface of the wire. Each coil 133 includes a winding portion 133a and two lead portions (not shown). The winding portion 133a is the portion of the wire that is wound around the tooth 131T. The two lead portions are portions of the wire that extend from both ends of the winding portion 133a.

[0184] The second motor 106 includes a lead group L. The lead group L of the fifth embodiment includes six lead portions (21st to 26th lead portions L21 to L26). Each of the 21st to 26th lead portions L21 to L26 has the same configuration as each of the 21st to 26th lead portions L21 to L26 of the fourth embodiment.

[0185] The electrical connection configuration (not shown) of the second motor 106 corresponds to a configuration in which, compared to the electrical connection configuration of the motor 6 of the fourth embodiment shown in Figure 11, the coil 33 between the seventh connection point P7 and the eighth connection point P8, the coil 33 between the eighth connection point P8 and the ninth connection point P9, the coil 33 between the ninth connection point P9 and the first connection point P1, the 27th lead portion L27, the 28th lead portion L28, and the 29th lead portion L29 are omitted.

[0186] Each of the six coils 133 is assigned to one of the U (UV) phase, V (VW) phase, and W (WU) phase. A pair of coils 133 is assigned to each of the U, V, and W phases. The six coils 133 include a pair of U-phase coils 133U assigned to the U phase, a pair of V-phase coils 133V assigned to the V phase, and a pair of W-phase coils 133W assigned to the W phase.

[0187] As shown in FIGS. 12 to 14, the rotor 120 includes a rotor core 121, a permanent magnet 123, a rotor shaft 50, and a fan 117. The rotor core 121 includes a plurality of laminated steel plates. The steel plates are metal plates whose main component is iron. The rotor core 121 is disposed so as to surround the rotation axis AX. The rotor core 121 is substantially cylindrical.

[0188] The rotor shaft 50 extends in the axial direction. The rotor shaft 50 is disposed so as to penetrate the inside of the rotor core 121 and is fixed to the rotor core 121. One end of the rotor shaft 50 is rotatably supported by a first bearing (not shown), and the other end of the rotor shaft 50 is rotatably supported by a second bearing (not shown).

[0189] The permanent magnets 123 are fixed to the rotor core 121. The permanent magnets 123 are disposed inside the rotor core 121. The second motor 106 is an interior permanent magnet (IPM) motor. Four permanent magnets 123 are disposed around the rotation axis AX. The permanent magnets 123 may be, for example, neodymium-iron-boron sintered magnets (NdFeB sintered magnets). The residual magnetic flux density of the permanent magnets 123 may be 1.0 T or more and 1.5 T or less.

[0190] The fan 117 is fixed to the rotor shaft 50. The fan 117 is disposed adjacent to the rotor core 121. At least a portion of the fan 117 is disposed in a position facing the rotor core 121. The fan 117 rotates together with the rotor shaft 50 to generate wind, and the wind is used to cool the second motor 106.

[0191] The second motor 106 includes a sensor board 160. The sensor board 160 includes three magnetic sensors 162 that detect the rotation of the rotor 120. The magnetic sensors 162 detect the position of the rotor 120 in the direction of rotation by detecting the magnetic flux of the permanent magnets 123. The magnetic sensors 162 further detect the rotation of the rotor 120.

[0192] The sensor board 160 includes a connection terminal 164. The connection terminal 164 is electrically connected to the three magnetic sensors 162. The connection terminal 164 is further electrically connected to the controller 11 via a signal line LS (see FIG. 7). The connection terminal 164 electrically connects the three magnetic sensors 162 to the controller 11. The controller 11 converts battery power into three-phase power based on detection signals and other information from the three magnetic sensors 162. The signal line LS is drawn from the sensor board 160 to the controller 11 and connected to the controller 11.

[0193] <Tube> 12 to 14, the second motor 106 includes a first tube TBu, a second tube TBv, and a third tube TBw. The first tube TBu, the second tube TBv, and the third tube TBw are each made of a heat-shrinkable tube.

[0194] The first tube TBu is configured in a cylindrical shape so that the 21st and 24th lead portions L21 and L24 are inserted into the first tube TBu. In other words, the first tube TBu bundles the 21st and 24th lead portions L21 and L24 of the lead group L. The second tube TBv is configured in a cylindrical shape so that the 22nd and 25th lead portions L22 and L25 are inserted into the second tube TBv. In other words, the second tube TBv bundles the 22nd and 25th lead portions L22 and L25 of the lead group L. The third tube TBw is configured in a cylindrical shape so that the 23rd and 26th lead portions L23 and L26 are inserted into the third tube TBw. In other words, the third tube TBw bundles the 23rd and 26th lead portions L23 and L26 of the lead group L.

[0195] Prior to the heat shrinking process, the first tube TBu has a cylindrical inner diameter large enough to allow the 21st and 24th leads L21, L24 to be inserted therethrough. After the 21st and 24th leads L21, L24 are inserted into the first tube TBu, heat is applied to the first tube TBu to perform the heat shrinking process, thereby binding the 21st and 24th leads L21, L24 together. The second tube TBv and the third tube TBw can also be subjected to the heat shrinking process in the same manner, thereby binding multiple leads together.

[0196] <Fusing terminal> 12 to 14, the second motor 106 includes a first fusing terminal 35U, a second fusing terminal 35V, and a third fusing terminal 35W. The first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W are each configured using a crimp terminal.

[0197] The first fusing terminal 35U joins an end of the 21st lead portion L21 to an end of the 24th lead portion L24. The first fusing terminal 35U corresponds to the U phase. The second fusing terminal 35V joins an end of the 22nd lead portion L22 to an end of the 25th lead portion L25. The second fusing terminal 35V corresponds to the V phase. The third fusing terminal 35W joins an end of the 23rd lead portion L23 to an end of the 26th lead portion L26. The third fusing terminal 35W corresponds to the W phase.

[0198] The first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W are each configured to join a plurality of lead portions among the 21st to 26th lead portions L21 to L26 by fusing processing. The fusing processing has the characteristic that the insulating coating of the 21st to 26th lead portions L21 to L26 can be stripped off and the lead portions and terminals can be crimped together at the same time.

[0199] The first to third fusing terminals 35U, 35V, and 35W are electrically connected to the controller 11. The controller 11 converts the battery power received from the battery pack 12 into three-phase power based on the detection signals from the three magnetic sensors 162 and other information. The controller 11 supplies the three-phase power to the second motor 106 via the first to third fusing terminals 35U, 35V, and 35W, thereby driving the second motor 106.

[0200] The second motor 106 includes four permanent magnets 123 and six teeth 131T (in other words, coils 133). The second motor 106 has a rotor 120 disposed inside the stator 130. In other words, the second motor 106 is a four-pole, six-slot inner rotor brushless motor.

[0201] <Technical Effects of the Embodiments> In the electric working machine 1 of the fifth embodiment, the 21st to 26th lead portions L21 to L26 bound by the first tube TBu, the second tube TBv, and the third tube TBw are prevented from rubbing against each other, thereby reducing wear on the coil 133. Therefore, the electric working machine 1 can improve the durability of the coil 133.

[0202] The first tube TBu, second tube TBv, and third tube TBw are configured to cover the 21st to 26th lead portions L21 to L26, thereby preventing not only damage caused by contact between the lead portions but also damage to the 21st to 26th lead portions L21 to L26 due to contact with other components.

[0203] By performing a fusing process to join the first fusing terminal 35U, the second fusing terminal 35V, and the third fusing terminal 35W to the 21st to 26th lead portions L21 to L26, the step of removing the insulating coating from the 21st to 26th lead portions L21 to L26 can be omitted. This eliminates the need to perform the insulating coating removal step separately, simplifying the manufacturing process of the second motor 106.

[0204] The second motor 106 includes a stator 130 having six coils 133. The stator 130 includes a number of coils 133 that is an integer multiple of three. In other words, the second motor 106 is configured to be driven by a supply of three-phase power. The second motor 106 includes first to third tubes TBu to TBw and first to third fusing terminals 35U to 35W, and by bundling the 21st to 26th lead portions L21 to L26 for each phase, wear on the lead portions can be suppressed and the durability of the coils 133 can be improved.

[0205] <Terminology correspondence> The two lead portions of the coil 133 and the lead group L correspond to an example of the two lead portions in the generalization of the embodiment.

[0206] [Other embodiments] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments and can be implemented in various modifications.

[0207] (1) In the above embodiment, the motor 6 is configured as a motor driven by a supply of three-phase power, in which a plurality of coils 33 are connected in a delta connection, but the present disclosure is not limited to such a configuration. For example, the motor may be a motor in which a plurality of coils 33 are connected in a Y connection, as shown in FIG.

[0208] (2) In the above embodiment, the multiple coils 33 of the motor 6 are connected as shown in FIG. 7 or FIG. 11 , but the present disclosure is not limited to such a configuration. For example, as shown in FIG. 16 , the motor 6 may include multiple coils 33 and first to ninth connection points P1 to P9. The multiple coils 33 may be connected in series between the first connection point P1 to the ninth connection point P9. In other words, the first to ninth connection points P1 to P9 each correspond to a connection point between two different coils 33. The first, fourth, and seventh connection points P1, P4, and P7 correspond to the U phase. The second, fifth, and eighth connection points P2, P5, and P8 correspond to the V phase. The third, sixth, and ninth connection points P3, P6, and P9 correspond to the W phase.

[0209] The motor 6 of this embodiment includes a lead group L. As in the fourth embodiment (see FIG. 11), the lead group L of this embodiment includes first to eighteenth lead portions L1 to L18 and twenty-first to twenty-ninth lead portions L21 to L29. Each of the twenty-first to twenty-ninth lead portions L21 to L29 includes a first end that is one end of the lead portion and a second end that is the other end.

[0210] In this embodiment, the connection structure between the first to ninth connection points P1 to P9 and the first to eighteenth lead portions L1 to L18 is different from the connection structure in the fourth embodiment. That is, the first connection point P1 is connected to the first lead portion L1 and the eighteenth lead portion L18. The second connection point P2 is connected to the second lead portion L2 and the third lead portion L3. The third connection point P3 is connected to the fourth lead portion L4 and the fifth lead portion L5. The fourth connection point P4 is connected to the sixth lead portion L6 and the seventh lead portion L7. The fifth connection point P5 is connected to the eighth lead portion L8 and the ninth lead portion L9. The sixth connection point P6 is connected to the tenth lead portion L10 and the eleventh lead portion L11. The seventh connection point P7 is connected to the twelfth lead portion L12 and the thirteenth lead portion L13. The fourteenth lead portion L14 and the fifteenth lead portion L15 are connected to the eighth connection point P8, and the sixteenth lead portion L16 and the seventeenth lead portion L17 are connected to the ninth connection point P9.

[0211] In this embodiment, the connection structure between the first to ninth connection points P1 to P9 and the twenty-first to twenty-ninth lead portions L21 to L29 is the same as the connection structure in the fourth embodiment. The motor 6 of this embodiment differs from the fourth embodiment in that it does not include the fourth tube TBua, the fifth tube TBva, and the sixth tube TBwa. In other words, the motor 6 of this embodiment includes only the first tube TBu, the second tube TBv, and the third tube TBw as heat-shrinkable tubes.

[0212] In this motor 6, the 21st to 29th lead portions L21 to L29 bound by the first tube TBu, the second tube TBv, and the third tube TBw are prevented from rubbing against each other, thereby reducing wear on the coil 33. Therefore, the motor 6 of this embodiment can improve the durability of the coil 33, similar to the above embodiments.

[0213] Furthermore, in the motor 6 of this embodiment, the multiple coils 33 are connected in series via the first connection point P1 to the ninth connection point P9, so that the multiple coils 33 can be configured using a single wire. This simplifies the configuration of the multiple coils 33, and therefore simplifies the manufacturing process of the motor 6.

[0214] (3) The motor 6 of the first embodiment is a 12-pole, 9-slot brushless motor. The second motor 106 of the fifth embodiment is a 4-pole, 6-slot inner rotor brushless motor. The present disclosure is not limited to such a configuration.

[0215] For example, the motor of the present disclosure may have any number of poles (i.e., magnets). The motor of the present disclosure may have any number of teeth (i.e., slots). Furthermore, the multiple coils may be connected to each other in any manner. Furthermore, the motor may be a motor of a type other than a brushless motor.

[0216] (4) The electric working machine 1 in the above embodiment is in the form of an electric chainsaw. However, the electric working machine of the present disclosure is not limited to this configuration. For example, the electric working machine of the present disclosure may be in the form of any of the various types of equipment described above that are configured to be used at work sites such as construction, manufacturing, gardening, and civil engineering.

[0217] Furthermore, the electric operating machine of the present disclosure may be configured to be operable by receiving AC power from an AC power source instead of or in addition to a battery pack. (5) In the above embodiment, the configurations in which the pull-out directions of the three fusing terminals (35U, 35V, 35W) from the motor 6 are all the same direction and the configurations in which all three are different directions are described, but the present disclosure is not limited to such configurations.

[0218] For example, two of the three drawing directions may be the same and the remaining one may be a different direction, or two of the three drawing directions may be perpendicular to the rotation axis AX and the remaining one may be parallel to the rotation axis AX.

[0219] Furthermore, the number of fusing terminals is not limited to three and may be four or more. In this case, the lead-out directions of the fusing terminals may all be the same, some may be the same, or all may be different.

[0220] (6) Multiple functions achieved by one component in the above embodiments may be achieved by multiple components, and one function achieved by one component may be achieved by multiple components. Also, multiple functions achieved by multiple components may be achieved by one component, and one function achieved by multiple components may be achieved by one component. Also, part of the configuration of the above embodiments may be omitted. Also, at least part of the configuration of one of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. [Explanation of symbols]

[0221] 1...electric work machine, 5...battery mounting portion, 6...motor, 10...saw chain, 11...controller, 12...battery pack, 20...rotor, 21B...yoke portion, 22...rotor core, 23...magnet, 30...stator, 31...stator core, 31A...yoke, 31B...teeth, 32...insulator, 33...coil, 33UV...first coil group, 33VW...second coil group, 33WU...third coil group, 33a...winding portion, 33b...lead portion, 35U...first fusing terminal, 35V...second fusing terminal, 35W...third fusing terminal, 40...stator base, 50...rotor shaft, 51...output shaft, 60...sensor board, 62...magnetic sensor, 64...connection terminal, 70...insulating member, 106...second motor, 120...rotor, 1 30... stator, 131T... teeth, 133... coil, 133U... U-phase coil, 133V... V-phase coil, 133W... W-phase coil, 133a... winding portion, 160... sensor board, 162... magnetic sensor, 164... connection terminal, AX... rotating shaft, L... lead group, L1 to L18... first lead portion to eighteenth lead portion, L21 to L29... twenty-first lead portion to twenty-ninth lead portion, LS... signal line, P1 to P9... first connection point to ninth connection point, TBu... first tube, TBv... second tube, TBw... third tube, TBua... fourth tube, TBva... fifth tube, TBwa... sixth tube, TBu1 to TBu3... first to third individual tubes of U phase, TBv1 to TBv3... first to third individual tubes of V phase, TBw1 to TBw3... first to third individual tubes of W phase.

Claims

1. A motor comprising a rotor and a stator, The rotor includes a magnet, the stator is disposed adjacent to the rotor, and the stator further includes a plurality of coils; Each of the plurality of coils is a winding portion wound around the stator; and two lead portions extending from the winding portion. A motor; a working unit configured to be driven by the rotor; a bundling portion configured to bundling at least two of the lead portions of the coils; An electric work machine equipped with:

2. The electric operating machine according to claim 1, The binding portion comprises a tubular binding portion, The tubular binding portion is configured in a tubular shape so that at least two of the lead portions are inserted into the tubular binding portion. Electric work equipment.

3. The electric operating machine according to claim 2, The tubular binding portion includes a heat shrink tube. Electric work equipment.

4. The electric operating machine according to claim 1, the binding portion comprises a joining binding portion; The splice binding portion is configured to join the ends of at least two of the lead portions together. Electric work equipment.

5. The electric operating machine according to claim 4, The joining tie includes a fusing terminal. Electric work equipment.

6. The electric operating machine according to claim 1, The binding portion includes a tubular binding portion and a joint binding portion, the tubular binding portion is configured in a tubular shape so that at least two of the lead portions are inserted into the tubular binding portion; The splice binding portion is configured to join the ends of at least two of the lead portions together. Electric work equipment.

7. The electric operating machine according to claim 1, The motor is a brushless motor. Electric work equipment.

8. The electric operating machine according to claim 7, The stator includes the plurality of coils, the number of which is an integer multiple of 3. Electric work equipment.

9. The electric operating machine according to claim 7, the bundling portion is configured to bundle the plurality of lead portions for each phase of the brushless motor. Electric work equipment.

10. The electric operating machine according to claim 7, The plurality of coils are connected in a delta connection. Electric work equipment.

11. The electric operating machine according to claim 7, The plurality of coils are connected in a Y-connection. Electric work equipment.

12. The electric operating machine according to claim 1, The binding portion is a first bundling portion configured to bundling at least two of the lead portions together at a position of the lead portions close to the winding portion; a second bundling section configured to bundling the at least two lead sections bundled by the first bundling section and at least some of the remaining lead sections at a position farther from the winding section than the first bundling section; Equipped with Electric work equipment.

13. The electric operating machine according to claim 1, The lead portions are all drawn out in the same direction from the motor. Electric work equipment.

14. The electric operating machine according to claim 1, directions in which the lead portions are drawn out from the motor include a first direction and a second direction different from the first direction; a lead-out direction of some of the plurality of lead portions is the first direction, The lead direction of at least some of the lead portions that are not drawn in the first direction is the second direction. Electric work equipment.

15. The electric operating machine according to claim 14, the lead-out directions of the plurality of lead portions from the motor further include a third direction different from the first direction and the second direction; the lead direction of at least some of the plurality of lead portions that are not drawn in either the first direction or the second direction is the third direction; Electric work equipment.

16. The electric operating machine according to claim 1, a direction in which the lead portions are drawn out from the motor is perpendicular to a rotation axis of the rotor of the motor; Electric work equipment.

17. The electric operating machine according to claim 1, a direction in which the lead portions extend from the motor is parallel to a rotation axis of the rotor of the motor; Electric work equipment.

18. The electric operating machine according to claim 1, The rotor is disposed outside the stator. Electric work equipment.

19. The electric operating machine according to claim 1, The rotor is disposed inside the stator. Electric work equipment.

20. A method for assembling a motor to be mounted on an electric work machine, comprising: abutting at least two of a plurality of lead portions of a plurality of coils of the motor against a bundling portion before bundling; performing a bundling process on the bundling portion where the at least two lead portions are in contact; A method for providing the above.

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