Electric work machine

Abstract

To waterproof a motor stored in a motor case.SOLUTION: An electric work machine has: a motor having a stator including a stator core, an insulator and a coil, a rotor rotating around a rotation axis with respect to the stator and a rotor shaft fixed to the rotor; an output part which is driven by the rotor shaft; a motor case which has a body part having an insertion port on one side in an axial direction, and a lid part connected to the body part so as to block the insertion port, and stores the stator and the rotor; a resin part which is stored in the motor case so as to cover at least a part of the motor; a waterproof member which is arranged on a wiring passage provided in the motor case so as to connect the internal space and the external space of the motor case; a connection terminal which is arranged inside the waterproof member and is connected to the coil; and a power source line which is connected to the connection terminal inside the waterproof member by welding.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The technology disclosed in this specification relates to an electric operating machine. [Background technology]

[0002] 2. Description of the Related Art In the technical field relating to electric working machines, an electric working machine as disclosed in Patent Document 1 is known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2022-185821 A Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the electric work machine includes a motor assembly. The motor assembly has a motor, a motor case that houses the motor, and a resin part (heat transfer resin part) that is housed in the motor case. There is a demand for a technology for waterproofing the motor housed in the motor case.

[0005] The technology disclosed in this specification aims to waterproof a motor housed in a motor case. [Means for solving the problem]

[0006] This specification discloses an electric working machine. The electric working machine may include a motor having a stator including a stator core, an insulator, and a coil, a rotor rotating about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor, an output section driven by the rotor shaft, a main body having an insertion opening on one axial side, and a lid connected to the main body so as to close the insertion opening, a motor case in which the stator and the rotor are housed, a resin part housed in the motor case so as to cover at least a part of the motor, a waterproof member arranged in a wiring passage provided in the motor case so as to connect an internal space and an external space of the motor case, a connection terminal arranged inside the waterproof member and connected to the coil, and a power line connected to the connection terminal inside the waterproof member by welding or adhesive. Effect of the Invention

[0007] According to the technique disclosed in this specification, the motor housed in the motor case is waterproofed. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing an electric operating machine according to a first embodiment. [Diagram 2] FIG. 2 is a perspective view showing the motor assembly according to the first embodiment. [Diagram 3] FIG. 3 is a vertical sectional view showing the motor assembly according to the first embodiment. [Figure 4] FIG. 4 is a vertical sectional view showing the motor assembly according to the first embodiment. [Diagram 5] FIG. 5 is a cross-sectional view showing the motor assembly according to the first embodiment. [Figure 6] FIG. 6 is an exploded perspective view showing the motor assembly according to the first embodiment. [Figure 7] FIG. 7 is a perspective view showing a part of the motor assembly according to the first embodiment. [Figure 8] FIG. 8 is an exploded perspective view showing a part of the motor assembly according to the first embodiment. [Figure 9] FIG. 9 is an exploded perspective view showing the motor according to the first embodiment. [Figure 10] FIG. 10 is an exploded perspective view showing the stator, rotor, and rotor shaft according to the first embodiment. [Figure 11] FIG. 11 is an exploded perspective view showing the stator according to the first embodiment. [Figure 12] FIG. 12 is an exploded perspective view showing the busbar unit according to the first embodiment. [Figure 13] FIG. 13 is an exploded perspective view showing the sensor substrate and the cover according to the first embodiment. [Figure 14] FIG. 14 is an exploded perspective view showing the sensor substrate and the cover according to the first embodiment. [Figure 15] FIG. 15 is an exploded perspective view showing the first holding mechanism according to the first embodiment. [Figure 16] FIG. 16 is an exploded perspective view showing the second holding mechanism according to the first embodiment. [Figure 17] FIG. 17 is a cross-sectional view showing the first holding mechanism and the second holding mechanism according to the first embodiment. [Figure 18] FIG. 18 is a cross-sectional view showing a portion of the motor assembly according to the first embodiment. [Figure 19] FIG. 19 is an exploded perspective view showing a part of the motor assembly 11 according to the first embodiment. [Figure 20] FIG. 20 is a cross-sectional view showing a portion of the motor assembly 11 according to the first embodiment. [Figure 21] FIG. 21 is a cross-sectional view illustrating a method for forming the resin portion according to the first embodiment. [Figure 22] FIG. 22 is a perspective view showing a part of the motor assembly after the resin portion according to the first embodiment has been formed. [Diagram 23] FIG. 23 is an exploded perspective view showing the stator according to the second embodiment. [Figure 24] FIG. 24 is a cross-sectional perspective view showing a stator according to the second embodiment. [Diagram 25]FIG. 25 is a perspective view illustrating a busbar unit according to the third embodiment. [Figure 26] FIG. 26 is an exploded perspective view showing a busbar unit according to the third embodiment. [Figure 27] FIG. 27 is a cross-sectional view showing a dividing rib according to the fourth embodiment. [Figure 28] FIG. 28 is an exploded perspective view showing the first holding mechanism according to the fifth embodiment. [Figure 29] FIG. 29 is a cross-sectional view showing the first holding mechanism according to the fifth embodiment. [Diagram 30] FIG. 30 is an exploded perspective view showing the first holding mechanism according to the sixth embodiment. [Diagram 31] FIG. 31 is a cross-sectional view showing the first holding mechanism according to the sixth embodiment. [Diagram 32] FIG. 32 is an exploded perspective view showing the first holding mechanism according to the seventh embodiment. [Diagram 33] FIG. 33 is a cross-sectional view showing a first holding mechanism according to the seventh embodiment. [Diagram 34] FIG. 34 is an exploded perspective view showing the first holding mechanism according to the eighth embodiment. [Diagram 35] FIG. 35 is a cross-sectional view showing the first holding mechanism according to the eighth embodiment. [Diagram 36] FIG. 36 is an exploded perspective view showing the first holding mechanism according to the ninth embodiment. [Figure 37] FIG. 37 is a cross-sectional view showing a first holding mechanism according to the ninth embodiment. [Figure 38] FIG. 38 is an exploded perspective view showing the second holding mechanism according to the tenth embodiment. [Figure 39] FIG. 39 is a cross-sectional view showing the second holding mechanism according to the tenth embodiment. [Diagram 40] FIG. 40 is an exploded perspective view showing the second holding mechanism according to the eleventh embodiment. [Diagram 41] FIG. 41 is a cross-sectional view showing the second holding mechanism according to the eleventh embodiment. [Diagram 42]FIG. 42 is a perspective view showing a second holding mechanism according to the twelfth embodiment. [Diagram 43] FIG. 43 is a cross-sectional view showing the second holding mechanism according to the twelfth embodiment. [Diagram 44] FIG. 44 is an exploded perspective view showing the second holding mechanism according to the thirteenth embodiment. [Diagram 45] FIG. 45 is a cross-sectional view showing the second holding mechanism according to the thirteenth embodiment. [Diagram 46] FIG. 46 is a cross-sectional view showing a portion of a motor assembly according to a fourteenth embodiment. [Figure 47] FIG. 47 is an enlarged cross-sectional view of a portion of the motor assembly according to the fourteenth embodiment. [Figure 48] FIG. 48 is an exploded perspective view showing the motor and the sensor board according to the fourteenth embodiment. [Figure 49] FIG. 49 is a perspective view showing a portion of a motor assembly according to a fourteenth embodiment. [Figure 50] FIG. 50 is an enlarged cross-sectional view of a portion of the motor assembly according to the fifteenth embodiment. [Figure 51] FIG. 51 is a perspective view showing a portion of a motor assembly according to a sixteenth embodiment. [Figure 52] FIG. 52 is an enlarged cross-sectional view of a portion of the motor assembly according to the sixteenth embodiment. [Figure 53] FIG. 53 is a perspective view showing a sensor substrate according to the sixteenth embodiment. [Figure 54] FIG. 54 is a perspective view showing a sensor substrate according to the seventeenth embodiment. [Figure 55] FIG. 55 is a cross-sectional view showing a portion of a motor assembly according to an eighteenth embodiment. [Figure 56] FIG. 56 is a perspective view showing a portion of a motor assembly according to an eighteenth embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In one or more embodiments, the electric work machine may include a motor having a stator including a stator core, an insulator, and a coil, a rotor rotating about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor, an output section driven by the rotor shaft, a main body section having an insertion opening on one axial side, and a lid section connected to the main body section so as to close the insertion opening, a motor case in which the stator and rotor are housed, a resin section housed in the motor case so as to cover at least a portion of the motor, a waterproof member arranged in a wiring passage provided in the motor case so as to connect the internal space of the motor case to the external space, a connection terminal arranged inside the waterproof member and connected to the coil, and a power line connected to the connection terminal by welding inside the waterproof member.

[0010] With the above-described configuration, the motor housed in the motor case is waterproofed, and the assembling of the motor assembly is made easier.

[0011] In one or more embodiments, the wire passages may be provided in the body portion.

[0012] In the above configuration, the power lines are smoothly routed.

[0013] In one or more embodiments, the waterproof member may have a cup portion, and the connection terminal and the power line may be fixed to the inside of the cup portion by welding.

[0014] The above-described configuration prevents moisture from entering the internal space from the external space of the motor case, and also improves the ease of assembling the motor assembly.

[0015] In one or more embodiments, the weld material may be filled inside the cup portion.

[0016] The above configuration suppresses the intrusion of moisture from the external space of the motor case into the internal space.

[0017] In one or more embodiments, a seal member may be provided to seal the interface between the outer surface of the waterproof member and the inner surface of the wire passage.

[0018] The above configuration suppresses the intrusion of moisture from the external space of the motor case into the internal space.

[0019] In one or more embodiments, the stator may include a busbar unit fixed to the insulator. The busbar unit may have an external terminal fixed to the connection terminal by a screw, a fusing terminal connected to the coil, a short-circuiting member connecting the external terminal and the fusing terminal, and an insulating member covering the short-circuiting member.

[0020] In the above configuration, the connection terminal and the coil are connected via the busbar unit.

[0021] In one or more embodiments, when the connection terminal is fixed to the external terminal by a screw, the waterproof member may move toward the center of the motor case, so that the outer surface of the waterproof member and the inner surface of the wiring passage each come into close contact with the sealing member.

[0022] With the above-described configuration, the motor housed in the motor case is waterproofed, and the assembling of the motor assembly is made easier.

[0023] In one or more embodiments, the electric operating machine may include a motor having a stator including a stator core, an insulator, and a coil, a rotor rotating about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor, an output section driven by the rotor shaft, a main body having an insertion opening on one axial side, and a lid connected to the main body so as to close the insertion opening, a motor case in which the stator and the rotor are housed, a resin part housed in the motor case so as to cover at least a part of the motor, a waterproof member arranged in a wiring passage provided in the motor case so as to connect an internal space and an external space of the motor case, a connection terminal fixed to the waterproof member, an external terminal fixed to the stator, and a screw for fixing the connection terminal and the external terminal. The waterproof member may move toward the center of the motor case by fixing the connection terminal to the external terminal by the screw. The waterproof member fitted in the wiring passage may be fixed by the screw.

[0024] With the above-described configuration, the motor housed in the motor case is waterproofed, and the assembling of the motor assembly is made easier.

[0025] In one or more embodiments, the connection terminal is fixed to the waterproof member by an adhesive.

[0026] The above-described configuration prevents moisture from entering the internal space from the external space of the motor case, and also improves the ease of assembling the motor assembly.

[0027] In one or more embodiments, the waterproof member may be made of a synthetic resin. The connection terminal may be integrally molded with the waterproof member.

[0028] The above-described configuration prevents moisture from entering the internal space from the external space of the motor case, and also improves the ease of assembling the motor assembly.

[0029] In one or more embodiments, a seal member may be disposed between the waterproof member and the motor case.

[0030] The above configuration suppresses the intrusion of moisture from the external space of the motor case into the internal space.

[0031] In one or more embodiments, the waterproofing member may be made of rubber.

[0032] The above configuration suppresses the intrusion of moisture from the external space of the motor case into the internal space.

[0033] In one or more embodiments, the electric work machine may include a motor having a stator including a stator core, an insulator, and a coil, a rotor rotating about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor, an output section driven by the rotor shaft, a main body section having an insertion opening on one axial side, and a lid section connected to the main body section so as to close the insertion opening, a motor case in which the stator and rotor are housed, a resin section housed in the motor case so as to cover at least a portion of the motor, a waterproof member arranged in a wiring passage provided in the motor case so as to connect the internal space of the motor case to the external space, a connection terminal arranged inside the waterproof member and connected to the coil, and a rubber member arranged inside the waterproof member and holding a power line connected to the connection terminal.

[0034] With the above-described configuration, the motor housed in the motor case is waterproofed, and the assembling of the motor assembly is made easier.

[0035] In one or more embodiments, the electric work machine may include a motor having a stator including a stator core, an insulator, and a coil, a rotor rotating about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor, an output section driven by the rotor shaft, a main body section having an insertion opening on one axial side, and a lid section connected to the main body section so as to close the insertion opening, a motor case in which the stator and rotor are housed, a resin section housed in the motor case so as to cover at least a portion of the motor, a waterproof member arranged in a wiring passage provided in the motor case so as to connect the internal space and the external space of the motor case, a connection terminal held in the waterproof member and connected to the coil, and a power line fixed to the connection terminal by a heat shrink tube outside the waterproof member.

[0036] With the above-described configuration, the motor housed in the motor case is waterproofed, and the assembling of the motor assembly is made easier.

[0037] In one or more embodiments, the electric work machine may include a motor having a stator including a stator core, an insulator, and a coil, a rotor rotating about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor, a sensor board supporting a magnetic sensor that detects rotation of the rotor, an output section driven by the rotor shaft, a main body section having an insertion opening on one axial side, and a lid section connected to the main body section so as to close the insertion opening, and a motor case in which the stator, rotor, and sensor board are housed, a resin section housed in the motor case so as to cover at least a portion of the motor, a waterproof member arranged in a wiring passage provided in the lid section so as to connect the internal space of the motor case to the external space, and a signal line connected to the sensor board and fixed with an adhesive inside the waterproof member.

[0038] With the above-described configuration, the motor housed in the motor case is waterproofed, and the assembling of the motor assembly is made easier.

[0039] In one or more embodiments, the waterproof member may have a cup portion. The adhesive may be filled inside the cup portion.

[0040] The above-described configuration prevents moisture from entering the internal space from the external space of the motor case, and also improves the ease of assembling the motor assembly.

[0041] In one or more embodiments, a seal member may be provided to seal the interface between the outer surface of the waterproof member and the inner surface of the wire passage.

[0042] The above configuration suppresses the intrusion of moisture from the external space of the motor case into the internal space.

[0043] In one or more embodiments, the electric work machine may include a motor having a stator including a stator core, an insulator, and a coil, a rotor rotating about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor, a sensor board supporting a magnetic sensor that detects rotation of the rotor, an output section driven by the rotor shaft, a main body having an insertion opening on one axial side, and a lid connected to the main body so as to close the insertion opening, a motor case in which the stator and rotor are housed, a resin part housed in the motor case so as to cover at least a portion of the motor, a waterproof member arranged in a wiring passage provided in the lid part so as to connect the internal space of the motor case to the external space, a signal line connected to the sensor board, and a rubber member arranged inside the waterproof member and holding the signal line.

[0044] With the above-described configuration, the motor housed in the motor case is waterproofed, and the assembling of the motor assembly is made easier.

[0045] In one or more embodiments, the electric work machine may include a motor having a stator including a stator core, an insulator, and a coil, a rotor rotating about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor, a sensor board supporting a magnetic sensor that detects rotation of the rotor, an output section driven by the rotor shaft, a main body having an insertion opening on one axial side, and a lid connected to the main body so as to close the insertion opening, a motor case in which the stator and rotor are housed, a resin part housed in the motor case so as to cover at least a portion of the motor, a waterproof member arranged in a wiring passage provided in the lid part so as to connect the internal space of the motor case to the external space, a signal line connected to the sensor board, and a heat shrink tube that seals the boundary between the waterproof member and the signal line outside the waterproof member.

[0046] With the above-described configuration, the motor housed in the motor case is waterproofed, and the assembling of the motor assembly is made easier.

[0047] In one or more embodiments, the electric operating machine may include a motor having a stator including a stator core, an insulator, and a coil, a rotor rotating about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor, a sensor board supporting a magnetic sensor that detects rotation of the rotor, an output section driven by the rotor shaft, a main body having an insertion opening on one axial side, and a lid connected to the main body so as to close the insertion opening, and a motor case in which the stator, the rotor, and the sensor board are housed, a resin part housed in the motor case so as to cover at least a part of the motor, a signal line held by the holding member and connected to the sensor board, and a waterproof member that is disposed in a wiring passage provided in the lid so as to connect an internal space of the motor case to an external space and supports the holding member. The waterproof member may have a snap fit that is hooked onto at least a part of the lid.

[0048] With the above-described configuration, the motor housed in the motor case is waterproofed, and the assembling of the motor assembly is made easier.

[0049] Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the embodiment. The components of the embodiments described below can be appropriately combined. In addition, some components may not be used.

[0050] The electric operating machine 1 has a motor 12. In the embodiment, a direction parallel to the rotation axis AX of the motor 12 is appropriately referred to as an axial direction. A radial direction of the rotation axis AX of the motor 12 is appropriately referred to as a radial direction. A direction going around the rotation axis AX of the motor 12 is appropriately referred to as a circumferential direction or a rotation direction.

[0051] In the axial direction, a position close to the center of the motor 12 or a direction approaching it is appropriately referred to as the axial inner side, and a position far from the center of the motor 12 or a direction away from it is appropriately referred to as the axial outer side. A position or direction on one side in the axial direction is appropriately referred to as the axial one side, and a position or direction on the other side in the axial direction is appropriately referred to as the axial other side. In the radial direction, a position close to the rotation axis AX of the motor 12 or a direction approaching it is appropriately referred to as the radial inner side, and a position far from the rotation axis AX of the motor 12 or a direction away from it is appropriately referred to as the radial outer side. A position or direction on one side in the circumferential direction is appropriately referred to as the circumferential one side, and a position or direction on the other side in the circumferential direction is appropriately referred to as the circumferential other side.

[0052] [First embodiment] A first embodiment will be described.

[0053] <Electric work equipment> 1 is a perspective view showing an electric work machine 1 according to this embodiment. In this embodiment, the electric work machine 1 is a chain saw, which is a type of garden tool (outdoor power equipment).

[0054] The electric work machine 1 includes a housing 2, a front grip portion 3, a hand guard 4, a battery cover 5, a controller 6, a trigger lock lever 7, a trigger switch 8, a guide bar 9, a saw chain 10, and a motor assembly 11.

[0055] The housing 2 is made of synthetic resin and has a motor accommodating portion 14, a battery holding portion 15, and a rear grip portion 16.

[0056] The motor accommodating portion 14 accommodates the motor assembly 11. The motor assembly 11 includes a motor 12.

[0057] The battery holding portion 15 holds a battery pack (not shown). The battery holding portion 15 has a battery attachment portion to which the battery pack is attached. The battery holding portion 15 holds the battery pack via the battery attachment portion. The battery holding portion 15 is connected to the rear end portion of the motor accommodating portion 14. The battery cover 5 is disposed so as to cover the battery pack held in the battery holding portion 15.

[0058] The battery pack is detachably attached to the battery holding portion 15. The battery pack includes a secondary battery. In this embodiment, the battery pack includes a rechargeable lithium-ion battery. The battery pack functions as a power supply portion of the electric work machine 1. By being held in the battery holding portion 15, the battery pack is capable of supplying power to the electric work machine 1.

[0059] The rear grip portion 16 is held by the hand of an operator using the electric work machine 1. The rear grip portion 16 is connected to the rear end portion of the battery holding portion 15. A part of the rear grip portion 16 is connected to an upper part of the rear end portion of the battery holding portion 15. A part of the rear grip portion 16 is connected to a lower part of the rear end portion of the battery holding portion 15.

[0060] An intake port 2A is provided on the left side of the motor accommodating section 14. An exhaust port 2B is provided on the front side of the motor accommodating section 14. Air outside the housing 2 can flow into the inside of the housing 2 through the intake port 2A. Air inside the housing 2 can flow out to the outside of the housing 2 through the exhaust port 2B.

[0061] The front grip portion 3 is held by the operator's hand. The front grip portion 3 is made of synthetic resin. The front grip portion 3 is a pipe-shaped member. The front grip portion 3 is connected to the housing 2. The left end portion of the front grip portion 3 is connected to the left side surface of the motor housing portion 14. The right end portion of the front grip portion 3 is connected to the right side surface of the battery holding portion 15.

[0062] The hand guard 4 protects the hands of an operator who grips the front grip portion 3. The hand guard 4 is disposed in front of the front grip portion 3. The hand guard 4 is connected to an upper portion of the motor housing portion 14.

[0063] The controller 6 outputs a control signal for controlling the electric work machine 1. The controller 6 controls the drive current supplied from the battery pack to the motor 12. The controller 6 is housed in the motor housing portion .

[0064] The trigger lock lever 7 is operated by an operator of the electric working machine 1 so as to set the trigger switch 8 in an operable state. The trigger lock lever 7 is disposed on the rear grip portion 16.

[0065] The trigger switch 8 is operated by an operator of the electric work machine 1 to drive the motor 12. The trigger switch 8 is disposed on the rear grip portion 16. The operator can grip the rear grip portion 16 with his / her hand, operate the trigger lock lever 7, and then operate the trigger switch 8 with his / her finger. By operating the trigger switch 8, a drive current is supplied to the motor 12, and the motor 12 is driven.

[0066] The guide bar 9 guides the saw chain 10. The guide bar 9 is a plate-shaped member that is long in the front-rear direction. The guide bar 9 extends forward from the housing 2.

[0067] The saw chain 10 is an output part of the electric work machine 1 driven by the motor 12. The saw chain 10 includes a plurality of cutters connected to each other. The saw chain 10 is disposed on the periphery of the guide bar 9. The motor 12 and the saw chain 10 are connected via a power transmission mechanism (not shown) including a sprocket. When the trigger switch 8 is operated and the motor 12 is driven, the saw chain 10 moves on the periphery of the guide bar 9.

[0068] <Motor assembly> Next, the motor assembly 11 will be described. In the following description, the positional relationship of each part will be described using the terms left, right, front, rear, top, and bottom. These terms indicate relative positions or directions with the center of the motor assembly 11 as the reference.

[0069] In the following description, the rotation axis AX of the motor 12 extends in the vertical direction. The axial direction parallel to the rotation axis AX coincides with the vertical direction. One axial side is the upper side, and the other axial side is the lower side.

[0070] When the motor assembly 11 is applied to the electric working machine 1 shown in FIG. 1, the motor assembly 11 may be disposed so that the rotation axis AX of the motor 12 coincides with the left-right direction of the electric working machine 1.

[0071] Fig. 2 is a perspective view showing the motor assembly 11 according to the present embodiment. Figs. 3 and 4 are vertical cross-sectional views showing the motor assembly 11 according to the present embodiment. Fig. 3 corresponds to a cross-sectional view taken along line AA in Fig. 2. Fig. 4 corresponds to a cross-sectional view taken along line BB in Fig. 2. Fig. 5 is a horizontal cross-sectional view showing the motor assembly 11 according to the present embodiment. Fig. 6 is an exploded perspective view showing the motor assembly 11 according to the present embodiment.

[0072] The motor assembly 11 has a motor 12, a motor case 13, a bearing 17, a bearing 18, a sensor board 19, a seal member 20, a seal member 21, a seal member 22, a first holding mechanism 23, a second holding mechanism 24, and a resin part 25.

[0073] The motor 12 is a power source for the electric work machine 1. The motor 12 is an electric motor that is driven based on a driving current supplied from a battery pack.

[0074] The motor 12 is an inner rotor type brushless motor. The motor 12 has a stator 26, a rotor 27 that rotates relative to the stator 26, and a rotor shaft 28 that is fixed to the rotor 27. The stator 26 is disposed so as to surround at least a portion of the rotor 27. The rotor 27 rotates about a rotation axis AX. The saw chain 10 is driven by the rotor shaft 28.

[0075] The motor case 13 accommodates at least a portion of the motor 12. In this embodiment, the motor case 13 accommodates at least the stator 26 and the rotor 27. The motor case 13 has an internal space in which the stator 26 and the rotor 27 are disposed. In the internal space of the motor case 13, the stator 26 is disposed so as to surround at least a portion of the rotor 27. The internal space is a closed space. In this embodiment, the internal space is a substantially sealed space. A portion of the rotor shaft 28 is disposed in the internal space.

[0076] The motor case 13 is made of metal. In this embodiment, the motor case 13 is made of aluminum. The motor case 13 may be made of aluminum die-cast (ADC12) or magnesium alloy die-cast (MDC1D).

[0077] The motor case 13 includes a main body portion 29 and a cover portion 30 .

[0078] The main body portion 29 accommodates the stator 26, the rotor 27, and the sensor board 19. The stator 26 and the rotor 27 are disposed inside the main body portion 29.

[0079] The main body 29 includes a tube 31, a wall 32, and a heat dissipation fin 33. The tube 31 is provided so as to surround the rotation axis AX. The tube 31 is arranged so as to surround the stator 26. The wall 32 is connected to the lower end of the tube 31 so as to close the opening at the lower end of the tube 31. The main body 29 has an insertion opening 34 on the upper side. The insertion opening 34 is provided at the upper end of the main body 29. The stator 26 is inserted into the inside of the main body 29 through the insertion opening 34 of the main body 29. The heat dissipation fin 33 is provided so as to protrude radially outward from the outer surface of the tube 31. The heat dissipation fin 33 is arranged so as to extend in the axial direction on the outer surface of the tube 31. A plurality of heat dissipation fins 33 are provided at intervals in the circumferential direction.

[0080] The lid portion 30 is connected to the upper end of the main body portion 29 so as to close the insertion opening 34 of the main body portion 29. By connecting the main body portion 29 and the lid portion 30 so that the insertion opening 34 of the main body portion 29 is closed by the lid portion 30, an internal space is formed between the main body portion 29 and the lid portion 30. After at least a part of the motor 12 including the stator 26 is disposed inside the main body portion 29, the insertion opening 34 of the main body portion 29 is closed by the lid portion 30, so that at least a part of the motor 12 is disposed in the internal space.

[0081] A plurality of screw boss portions 35 are provided around the insertion opening 34 in the main body portion 29. In this embodiment, four screw boss portions 35 are provided at intervals in the circumferential direction. A screw hole is provided in each of the plurality of screw boss portions 35. A plurality of screw boss portions 36 are provided on the peripheral edge portion of the lid portion 30. In this embodiment, four screw boss portions 36 are provided at intervals in the circumferential direction. An opening is provided in each of the plurality of screw boss portions 36. With an intermediate portion of a screw 37 positioned in the opening of the screw boss portion 36, the tip portion of the screw 37 is coupled to the screw hole of the screw boss portion 35, thereby fixing the main body portion 29 and the lid portion 30.

[0082] The lid portion 30 has a tubular portion 38 in which an upper portion of the rotor shaft 28 is disposed. The wall portion 32 has a tubular portion 39 in which a lower portion of the rotor shaft 28 is disposed. The tubular portion 38 protrudes upward from the upper surface of the lid portion 30. The tubular portion 39 protrudes downward from the lower surface of the wall portion 32. The internal space of the motor case 13 and the external space of the motor case 13 are connected via an inner passage of the tubular portion 38. The internal space of the motor case 13 and the external space of the motor case 13 are connected via an inner passage of the tubular portion 39.

[0083] The bearings 17 and 18 each support a rotor shaft 28. The rotor shaft 28 is rotatably supported by the bearings 17 and 18. The bearing 17 is held by a cylindrical portion 38. The bearing 18 is held by a cylindrical portion 39.

[0084] The upper and lower ends of the rotor shaft 28 are disposed outside the motor case 13. The lower end of the rotor shaft 28 is connected to the saw chain 10 via a power transmission mechanism (not shown) including a sprocket. The saw chain 10 is driven by the rotor shaft 28. The saw chain 10 is driven by the rotation of the rotor shaft 28.

[0085] The seal member 20 seals the boundary between the rotor shaft 28 and the cylindrical portion 38. The seal member 20 includes an oil seal. The seal member 20 is disposed inside the cylindrical portion 38. The seal member 20 is press-fitted between the rotor shaft 28 and the cylindrical portion 38. The seal member 20 is supported by the cylindrical portion 38.

[0086] The seal member 21 seals the boundary between the rotor shaft 28 and the cylindrical portion 39. The seal member 21 includes an oil seal. The seal member 21 is disposed inside the cylindrical portion 39. The seal member 21 is press-fitted between the rotor shaft 28 and the cylindrical portion 39. The seal member 21 is supported by the cylindrical portion 39.

[0087] The seal member 22 seals the boundary between the main body 29 and the lid 30. The seal member 22 includes an O-ring. The seal member 22 is disposed so as to surround the insertion opening 34. The upper end of the main body 29 is disposed so as to face the inner surface (lower surface) of the lid 30.

[0088] The resin part 25 is made of synthetic resin. The resin part 25 is housed in the motor case 13. The resin part 25 is disposed in the internal space of the motor case 13. The resin part 25 is disposed in the internal space of the motor case 13 so as to cover at least a portion of the motor 12. The resin part 25 contacts at least a portion of the inner surface of the motor case 13.

[0089] FIG. 7 is a perspective view showing a part of the motor assembly 11 according to this embodiment. FIG. 7 corresponds to a view in which the cover portion 30 and the resin portion 25 have been removed from the motor assembly 11. FIG. 8 is an exploded perspective view showing a part of the motor assembly 11 according to this embodiment. FIG. 8 corresponds to a view in which the part of the motor assembly 11 shown in FIG. 7 has been exploded. FIG. 9 is an exploded perspective view showing the motor 12 according to this embodiment. FIG. 10 is an exploded perspective view showing the stator 26, the rotor 27, and the rotor shaft 28 according to this embodiment. FIG. 11 is an exploded perspective view showing the stator 26 according to this embodiment.

[0090] The stator 26 includes a stator core 40 , an insulator 41 , a coil 42 , and a busbar unit 43 .

[0091] The stator core 40 includes a plurality of stacked steel plates. The steel plates are metal plates whose main component is iron. The stator core 40 has an annular yoke 44 and teeth 45 protruding radially inward from the inner peripheral surface of the yoke 44. The yoke 44 is arranged so as to surround the rotation axis AX. A plurality of teeth 45 are arranged in the circumferential direction. In this embodiment, twelve teeth 45 are arranged. The plurality of teeth 45 are arranged at equal intervals in the circumferential direction.

[0092] The insulator 41 covers at least a portion of the surface of the stator core 40. The insulator 41 covers at least the coil support surface of the teeth 45 around which the coil 42 is wound. In this embodiment, the insulator 41 is provided so as to cover the entire coil support surface. The insulator 41 is made of synthetic resin. The insulator 41 is fixed to the stator core 40. The insulator 41 is molded integrally with the stator core 40. The insulator 41 is fixed to the stator core 40 by insert molding.

[0093] The coils 42 are wound around the teeth 45 via the insulators 41. The coils 42 are arranged around the coil support surfaces of the teeth 45 via the insulators 41. The coils 42 and the stator core 40 are insulated by the insulators 41. A plurality of the coils 42 are provided in the circumferential direction. In this embodiment, twelve coils 42 are provided.

[0094] The busbar unit 43 is supplied with a driving current from the battery pack. The busbar unit 43 is fixed to an upper part of the insulator 41. The busbar unit 43 is fixed to the insulator 41 on one side above the stator core 40. The busbar unit 43 is fixed to the insulator 41 by busbar screws 46. The driving current from the battery pack is supplied to the busbar unit 43 via the controller 6.

[0095] 12 is an exploded perspective view showing a busbar unit 43 according to this embodiment. The busbar unit 43 has an external terminal 47, a fusing terminal 48, a short-circuit member 49, and an insulating member 50.

[0096] The external terminal 47 is connected to the connection terminal 51. The connection terminal 51 and the external terminal 47 are fixed by a terminal screw 52. The connection terminal 51 is connected to a power line 53. The external terminal 47 is connected to the power line 53 via the connection terminal 51. The external terminal 47 is connected to the battery pack via the connection terminal 51, the power line 53, and the controller 6. A driving current from the battery pack is supplied to the external terminal 47 via the power line 53 and the connection terminal 51. In the embodiment, three external terminals 47 are provided.

[0097] The fusing terminal 48 is connected to the coil 42. Some of the coils 42 that are adjacent to each other are connected via a connection wire 54. The fusing terminal 48 is connected to the connection wire 54 while being held on the upper part of the insulator 41. The fusing terminal 48 and the connection wire 54 are welded together, so that the fusing terminal 48 is connected to the coil 42 via the connection wire 54.

[0098] The short-circuit member 49 connects (short-circuits) a pair of radially opposing connection wires 54. The pair of radially opposing connection wires 54 are spaced 180° apart in the circumferential direction. The short-circuit member 49 connects the external terminal 47 and the fusing terminal 48. The short-circuit member 49 is a conductive member. The short-circuit member 49 is curved in a plane perpendicular to the rotation axis AX. A plurality of short-circuit members 49 are provided. In the embodiment, three short-circuit members 49 are provided. The short-circuit member 49 connects (short-circuits) one external terminal 47 and two fusing terminals 48.

[0099] The external terminal 47 is connected to each of the short-circuit member 49 and the connection terminal 51. The external terminal 47 is connected to the coil 42 via the short-circuit member 49 and the fusing terminal 48. The connection terminal 51 is connected to the coil 42 via the external terminal 47, the short-circuit member 49, and the fusing terminal 48. The short-circuit member 49 connects (short-circuits) a pair of coils 42 facing each other in the radial direction. The connection terminal 51 is connected to a power supply line 53. The external terminal 47 is connected to the power supply line 53 via the connection terminal 51. The external terminal 47 and the connection terminal 51 are fixed by a terminal screw 52. The external terminal 47 is connected to the battery pack via the connection terminal 51, the power supply line 53, and the controller 6. The power supply line 53 is a lead wire connected to the coil 42 via the connection terminal 51, the external terminal 47, and the short-circuit member 49. A drive current for the coil 42 is output from the battery pack. The driving current for the coil 42 output from the battery pack is supplied to the coil 42 via the controller 6 , the power line 53 , the connection terminal 51 , the external terminal 47 , and the short-circuit member 49 .

[0100] The insulating member 50 is made of synthetic resin. The insulating member 50 is provided so as to surround the rotating shaft AX. The insulating member 50 covers at least a portion of the short-circuit member 49. The short-circuit member 49 is disposed inside the insulating member 50. The insulating member 50 supports the external terminal 47 and the short-circuit member 49. The fusing terminal 48 is supported by the insulating member 50 via the short-circuit member 49.

[0101] The controller 6 controls the driving current supplied from the battery pack to the bus bar unit 43. The driving current from the battery pack is supplied to the external terminal 47 of the bus bar unit 43 via the controller 6, the power line 53, and the connection terminal 51. The driving current supplied from the battery pack to the external terminal 47 flows through the short-circuit member 49 and is then supplied to the coil 42.

[0102] The rotor 27 includes a rotor core 55 and a rotor magnet 56 .

[0103] The rotor core 55 includes a plurality of stacked steel plates. The steel plates are metal plates whose main component is iron. The rotor core 55 is disposed so as to surround the rotating shaft AX. The stator core 40 is disposed around the rotor core 55.

[0104] The rotor magnet 56 is a permanent magnet. The rotor magnet 56 is supported by the rotor core 55. The rotor magnet 56 is disposed inside the rotor core 55. A plurality of rotor magnets 56 are provided in the circumferential direction. In this embodiment, eight rotor magnets 56 are provided.

[0105] As shown in Fig. 5, in this embodiment, rotor core 55 has a plurality of hollow holes 57 spaced apart in the circumferential direction. Hollow holes 57 are formed so as to penetrate through the upper end surface and the lower end surface of rotor core 55. Hollow holes 57 are provided radially inward of rotor magnet 56. In this embodiment, four hollow holes 57 are provided. The hollow holes 57 reduce the weight of rotor core 55.

[0106] The rotor shaft 28 extends in the axial direction. The central axis of the rotor shaft 28 and the rotation axis AX coincide with each other. The rotor shaft 28 is disposed inside the rotor core 55. The rotor core 55 and the rotor shaft 28 are fixed. In this embodiment, a cylindrical member 58 is disposed around the rotor shaft 28. The cylindrical member 58 is formed of an electrically insulating material. The rotor shaft 28 is fixed to the rotor core 55 via the cylindrical member 58. An upper portion of the rotor shaft 28 protrudes upward from an upper end surface of the rotor core 55. A lower portion of the rotor shaft 28 protrudes downward from a lower end surface of the rotor core 55.

[0107] A rotating magnetic field is generated in the stator 26 when a driving current is supplied from the battery pack to the coil 42 via the controller 6. The generation of the rotating magnetic field causes the rotor 27 and the rotor shaft 28 to rotate about the rotation axis AX.

[0108] In the present embodiment, the resin portion 25 is disposed in the internal space of the motor case 13 so as to cover the stator core 40 and the insulator 41. Moreover, the resin portion 25 is disposed in the internal space of the motor case 13 so as to cover the bus bar unit 43 and the bus bar screws 46.

[0109] Resin portion 25 has high thermal conductivity and electrical insulation. The thermal conductivity of resin portion 25 is higher than that of insulator 41. For example, when insulator 41 is made of nylon resin and nylon resin has a thermal conductivity of 0.2 [W / m K], the thermal conductivity of the synthetic resin used for resin portion 25 is higher than 0.2 [W / m K].

[0110] An example of an insulating synthetic resin having a thermal conductivity higher than 0.2 [W / m·K] is unsaturated polyester resin. The resin portion 25 may be made of nylon resin containing an insulating thermally conductive filler.

[0111] Fig. 13 and Fig. 14 are exploded perspective views showing the sensor board 19 and the lid portion 30 according to this embodiment. Fig. 13 is a view of the sensor board 19 and the lid portion 30 seen from the upper right rear. Fig. 14 is a view of the sensor board 19 and the lid portion 30 seen from the lower right front.

[0112] The sensor board 19 supports a magnetic sensor 59 that detects the rotation of the rotor 27. The sensor board 19 is disposed in the internal space of the motor case 13. The sensor board 19 is annular. The sensor board 19 is disposed around the rotor shaft 28. The sensor board 19 includes a circuit board 60 on which the magnetic sensor 59 is mounted, and a resin film 61 that covers at least a part of the surface of the magnetic sensor 59 and the circuit board 60. The circuit board 60 includes a printed wiring board (PWB). An example of a material for forming the circuit board 60 is epoxy resin. The circuit board 60 may be made of a metal such as aluminum, or may be made of a heat dissipating resin having a higher thermal conductivity than epoxy resin. The resin film 61 functions as a heat insulating film.

[0113] In the axial direction, the sensor board 19 is disposed between the cover portion 30 and the stator 26. The sensor board 19 is fixed to the motor case 13. The sensor board 19 is fixed to the cover portion 30 by board screws 62.

[0114] The magnetic sensor 59 detects the rotor magnet 56. The magnetic sensor 59 is supported on the sensor board 19 so as to face the rotor magnet 56. An example of the magnetic sensor 59 is a Hall element. The magnetic sensor 59 detects the rotor magnet 56 to detect the rotation of the rotor 27. A signal line 63 is connected to the sensor board 19. Five signal lines 63 are arranged. A detection signal of the magnetic sensor 59 is transmitted to the controller 6 via the signal line 63.

[0115] The first holding mechanism 23 holds the power line 53. The second holding mechanism 24 holds the signal line 63. The first holding mechanism 23 is disposed in the main body portion 29. The second holding mechanism 24 is disposed in the lid portion 30.

[0116] Fig. 15 is an exploded perspective view showing the first holding mechanism 23 according to this embodiment. Fig. 16 is an exploded perspective view showing the second holding mechanism 24 according to this embodiment. Fig. 17 is a cross-sectional view showing the first holding mechanism 23 and the second holding mechanism 24 according to this embodiment.

[0117] The first holding mechanism 23 has a waterproof member 65 that holds the connection terminal 51 and the power line 53. The waterproof member 65 is made of synthetic resin. The waterproof member 65 is made of, for example, nylon resin. The connection terminal 51 and the power line 53 are each disposed inside the waterproof member 65. The connection terminal 51 and the power line 53 are fixed inside the waterproof member 65 by welding or adhesive 64. The connection terminal 51 and the waterproof member 65 are fixed by welding or adhesive 64. The power line 53 and the waterproof member 65 are fixed by welding or adhesive 64.

[0118] The motor case 13 has a wire passage 67 in which the waterproof member 65 is disposed. The wire passage 67 is provided in a part of the motor case 13 so as to connect the internal space of the motor case 13 with the external space. The wire passage 67 is provided in the main body 29. The waterproof member 65 is disposed in the wire passage 67.

[0119] A seal member 68 is provided to seal the boundary between the outer surface of the waterproof member 65 and the inner surface of the wire passage 67. The seal member 68 is an O-ring.

[0120] The adhesive 64 has holes 66 in which the power lines 53 are disposed. Three holes 66 are provided. The three holes 66 are provided parallel to each other. There are three power lines 53. A power line 53 is disposed in each of the three holes 66. The outer surface of the power line 53 and the inner surface of the hole 66 are in close contact with each other.

[0121] The waterproof member 65 has a cup portion 65A and a holding portion 65B that holds the connection terminal 51. The holding portion 65B is disposed forward of the cup portion 65A (toward the center of the motor case 13). The connection terminal 51 and the power line 53 are fixed inside the cup portion 65A by welding or adhesive 64, and the welding agent or adhesive 64 is filled inside the cup portion 65A without any gaps. The connection terminal 51 and the cup portion 65A are fixed by welding or adhesive 64. The power line 53 and the cup portion 65A are fixed by welding or adhesive 64. In this embodiment, the inner space of the cup portion 65A is partitioned into three spaces by partition walls 69. One power line 53 and one connection terminal 51 are disposed in one space.

[0122] With the power line 53 and the connection terminal 51 connected, the external terminal 47 and the connection terminal 51 are fixed by the terminal screw 52. The waterproof member 65 fitted in the wiring passage 67 is fixed by the terminal screw 52. The terminal screw 52 is tightened to fix the connection terminal 51 to the external terminal 47 by the terminal screw 52, ​​and the waterproof member 65 moves toward the center of the motor case 13. In other words, when the external terminal 47 and the connection terminal 51 are fixed by the terminal screw 52, ​​the waterproof member 65 moves forward so as to approach the motor case 13. Due to the movement of the waterproof member 65, the outer surface of the waterproof member 65 and the inner surface of the wiring passage 67 each come into close contact with the seal member 68. As a result, the waterproof member 65 is fixed in a state of being in close contact with the main body 29.

[0123] In addition, instead of the adhesive 64, a flexible resin such as a low-temperature, low-pressure molding resin may be disposed inside the waterproof member 65. Instead of the adhesive 64, a welding agent used for welding may be disposed inside the waterproof member 65.

[0124] The second holding mechanism 24 has a waterproof member 71 that holds the signal line 63. The waterproof member 71 is made of synthetic resin. The waterproof member 71 is made of, for example, nylon resin. The signal line 63 is disposed inside the waterproof member 71. The signal line 63 is fixed inside the waterproof member 71 by an adhesive 70. The signal line 63 and the waterproof member 71 are fixed by the adhesive 70.

[0125] A seal member 74 is provided to seal the boundary between the outer surface of the waterproof member 71 and the inner surface of the wire passage 73. The seal member 74 is an O-ring.

[0126] The adhesive 70 has holes 72 in which the signal lines 63 are disposed. Five holes 72 are provided. The five holes 72 are provided parallel to one another. There are five signal lines 63. A signal line 63 is disposed in each of the five holes 72. The outer surface of the signal line 63 and the inner surface of the hole 72 are in close contact with each other.

[0127] The waterproof member 71 has a cup portion 71A and a holding portion 71B that holds the signal line 63. The holding portion 71B is disposed below the cup portion 71A (toward the center of the motor case 13). The signal line 63 is fixed to the inside of the cup portion 71A by an adhesive 70, and the adhesive 70 is filled into the inside of the cup portion 71A without leaving any gaps. The signal line 63 and the cup portion 71A are fixed to each other by the adhesive 70.

[0128] Instead of the adhesive 70, a flexible resin such as a low-temperature, low-pressure molding resin may be disposed inside the waterproof member 71.

[0129] The waterproof member 71 has a protruding portion 75 that protrudes rearward from the cup portion 71A. An opening 76 is provided in the protruding portion 75. A screw 77 is inserted into the opening 76 from below the protruding portion 75. The screw 77 is coupled to a screw hole provided in the lid portion 30. The waterproof member 71 is fixed to the lid portion 30 by the screw 77.

[0130] With the signal line 63 and the sensor board 19 connected, the waterproof member 71 and the lid portion 30 are fixed together by the screw 77. When the screw 77 is tightened, the waterproof member 71 moves upward so as to approach the lid portion 30. As the waterproof member 71 moves, the outer surface of the waterproof member 71 and the inner surface of the wiring passage 73 each come into close contact with the seal member 74. As a result, the waterproof member 71 is fixed in a state of being in close contact with the lid portion 30.

[0131] FIG. 18 is a cross-sectional view showing a part of the motor assembly 11 according to this embodiment. In FIG. 18, the resin part 25 is not shown. As described above, the main body part 29 has a tubular part 31 arranged to surround the stator 26. As shown in FIG. 18, the inner circumferential surface of the tubular part 31 includes a small diameter part 78 and a large diameter part 79 provided above the small diameter part 78. A support surface 80 is provided at the boundary between the small diameter part 78 and the large diameter part 79. The support surface 80 faces upward. The support surface 80 is perpendicular to an axis parallel to the rotation axis AX. The support surface 80 is annular and surrounds the rotation axis AX.

[0132] In this embodiment, the support surface 80 supports at least a portion of the upper stator 26. In this embodiment, the upper part of the insulator 41 protrudes radially outward from the upper end face of the stator core 40. That is, the insulator 41 has a protruding portion 41A that protrudes radially outward from the end face of the upper stator core 40. The support surface 80 supports the protruding portion 41A from below. The upper part of the insulator 41 is supported by the support surface 80 from below.

[0133] Fig. 19 is an exploded perspective view showing a part of the motor assembly 11 according to this embodiment. Fig. 20 is a cross-sectional view showing a part of the motor assembly 11 according to this embodiment. Fig. 20 corresponds to a cross-sectional view taken along line CC in Fig. 19.

[0134] The three external terminals 47 are arranged adjacent to each other. The external terminals 47 are partitioned by a partition rib 81 provided on a part of the insulating member 50. That is, the partition rib 81 is arranged between a pair of adjacent external terminals 47.

[0135] In this embodiment, a portion of the partitioning rib 81 is formed by the resin portion 25 , and a portion of the partitioning rib 81 is formed by the insulating member 50 .

[0136] The insulating member 50 has a thick portion 81A and a thin portion 81B disposed above the thick portion 81A. In the left-right direction, the dimension of the thin portion 81B is smaller than the dimension of the thick portion 81A. The surface of the thin portion 81B is covered with a resin portion 25. In this embodiment, the partitioning rib 81 includes the thick portion 81A and the resin portion 25 that covers the thin portion 81B. In the left-right direction, the sum of the dimensions of the thin portion 81B and the resin portion 25 is substantially equal to the dimension of the thick portion 81A.

[0137] <Method of forming resin portion 25> FIG. 21 is a cross-sectional view for explaining a method for forming the resin part 25 according to the present embodiment. The stator 26 including the stator core 40, the insulator 41, the coil 42, and the busbar unit 43 is inserted into the inside of the main body part 29 through the insertion port 34. As described with reference to FIG. 18, at least a part of the upper part of the stator 26 inserted into the inside of the main body part 29 is supported by the support surface 80 of the main body part 29 provided on the inside of the main body part 29. In this embodiment, the protruding part 41A of the insulator 41 is supported by the support surface 80. Since the protruding part 41A provided on the upper part of the insulator 41 is supported by the support surface 80, the main body part 29 and the stator 26 are properly positioned. Since the main body part 29 and the stator 26 are properly positioned in the axial direction, the external terminal 47 and the connection terminal 51 are properly positioned.

[0138] After the stator 26 is inserted inside the main body 29, a mold is inserted inside the main body 29. After the mold is inserted inside the main body 29, heated and melted synthetic resin is supplied to the mold through the insertion port 34. With the protruding portion 41A supported on the support surface 80, the heated and melted synthetic resin is supplied to the inside of the main body 29 through the mold.

[0139] The synthetic resin supplied to the mold does not have to be heated and melted. A synthetic resin that does not need to be heated and melted may be used. A synthetic resin that is liquid at room temperature may be baked and hardened.

[0140] 21 , the die has a pin 82 that presses the upper end face of the stator core 40. The pin 82 presses the upper end face of the yoke 44 of the stator core 40 from above. The lower end face of the pin 82 contacts both the upper end face of the yoke 44 and the support surface 80 of the main body portion 29.

[0141] With the upper end surface of the yoke 44 and the support surface 80 of the main body portion 29 each held down by the pins 82, heated and melted synthetic resin is supplied to the inside of the main body portion 29 via a mold. The synthetic resin supplied to the inside of the main body portion 29 is solidified, thereby forming the resin portion 25 on the inside of the main body portion 29. Because the pins 82 press down the yoke 44 from above, movement of the stator 26 relative to the main body portion 29 is suppressed when the synthetic resin is supplied to the inside of the main body portion 29.

[0142] 22 is a perspective view showing a part of the motor assembly 11 after the resin part 25 according to this embodiment has been formed. Synthetic resin is supplied to the inside of the main body part 29, and after the synthetic resin has solidified, the mold is removed. By removing the pin 82 of the mold from the resin part 25, a recess 83 that is a mark of the pin 82 is formed in the resin part 25.

[0143] After the stator 26 and the resin part 25 are arranged inside the main body part 29, the rotor 27 and the rotor shaft 28 are inserted into the inside of the main body part 29 through the insertion opening 34. After the rotor 27 is arranged inside the main body part 29, the lid part 30 to which the sensor board 19 is fixed is connected to the main body part 29 so as to cover the insertion opening 34. The lid part 30 and the main body part 29 are fixed with screws 37.

[0144] <Effects> As described above, the electric working machine 1 includes the stator 26 including the stator core 40, the insulator 41, and the coil 42, the motor 12 having the rotor 27 rotating about the rotation axis AX relative to the stator 26 and the rotor shaft 28 fixed to the rotor 27, the saw chain 10 which is an output part driven by the rotor shaft 28, the main body 29 having the insertion opening 34 on one axial side, the lid 30 connected to the main body 29 so as to close the insertion opening 34, the motor case 13 in which the stator 26 and the rotor 27 are housed, and the resin part 25 housed in the motor case 13 so as to cover at least a part of the motor 12. The main body 29 has a support surface 80 which supports at least a part of the stator 26 on one axial side.

[0145] In the above configuration, the motor 12 is positioned relative to the motor case 13. Since the external terminals 47 and the connection terminals 51 can be easily positioned in the axial direction, the connection between the external terminals 47 and the connection terminals 51 is stable.

[0146] In this embodiment, the insulator 41 has a protruding portion 41A that protrudes radially outward from an end face of the stator core 40 on one axial side. The support surface 80 supports the protruding portion 41A.

[0147] In the above configuration, the protrusion 41A is supported by the support surface 80.

[0148] In this embodiment, the main body 29 has a tubular portion 31 disposed so as to surround the stator 26. The inner circumferential surface of the tubular portion 31 includes a small diameter portion 78 and a large diameter portion 79 disposed on one axial side of the small diameter portion 78. The support surface 80 is provided at the boundary between the small diameter portion 78 and the large diameter portion 79.

[0149] In the above configuration, a support surface 80 is provided on the inside of the main body portion 29 .

[0150] In this embodiment, the support surface 80 is perpendicular to an axis parallel to the axis of rotation AX.

[0151] In the above configuration, the support surface 80 can stably support the protrusion 41A.

[0152] In this embodiment, the support surface 80 is annular and surrounds the rotation axis AX.

[0153] In the above configuration, the support surface 80 can stably support the protrusion 41A.

[0154] In the present embodiment, the stator 26 includes a bus bar unit 43 that is fixed to an insulator 41 on one axial side of the stator core 40 .

[0155] In the above configuration, the motor case 13 and the bus bar unit 43 are positioned. Since the external terminals 47 and the connection terminals 51 can be easily positioned in the axial direction, the connection between the external terminals 47 and the connection terminals 51 is stabilized.

[0156] In this embodiment, the stator core 40 has a yoke 44 and teeth 45 protruding radially inward from the yoke 44. The coils 42 are disposed around the coil support surfaces of the teeth 45. The insulator 41 is provided so as to cover the entire coil support surface.

[0157] In the above configuration, the coil 42 and the stator core 40 are insulated from each other by the insulator 41 .

[0158] In this embodiment, the stator 26 includes a busbar unit 43 fixed to the insulator 41. The busbar unit 43 has an external terminal 47 connected to the power line 53 via a connection terminal 51, a fusing terminal 48 connected to the coil 42, a short-circuiting member 49 connecting the external terminal 47 and the fusing terminal 48, and an insulating member 50 covering at least a portion of the short-circuiting member 49. The multiple external terminals 47 are arranged adjacent to each other. A partitioning rib 81 is arranged between a pair of adjacent external terminals 47. A portion of the partitioning rib 81 is formed by the resin portion 25, and a portion of the partitioning rib 81 is formed by the insulating member 50.

[0159] The above configuration suppresses the occurrence of burrs in the resin part 25 at the partitioning rib 81. That is, if the partitioning rib 81 is formed only from the insulating member 50, a part of the resin part 25 will remain as a thin film on the surface of the insulating member 50, which may result in the occurrence of burrs in the resin part 25. By actively forming the partitioning rib 81 from the resin part 25, the resin part 25 is properly molded, thereby suppressing the occurrence of burrs.

[0160] In this embodiment, the insulating member 50 has a thick portion 81A and a thin portion 81B disposed on one axial side of the thick portion 81A. The partitioning rib 81 includes a resin portion 25 that covers the thick portion 81A and the thin portion 81B.

[0161] In the above configuration, the insulating member 50 suppresses a decrease in strength of the partitioning rib 81. In other words, if the strength of the resin part 25 is low, the strength of the partitioning rib 81 will decrease if the partitioning rib 81 is formed only from the resin part 25. By providing the thin-walled part of the insulating member 50 as the base material of the partitioning rib 81, a decrease in strength of the partitioning rib 81 is suppressed.

[0162] In this embodiment, the manufacturing method of the motor assembly 11 includes inserting the stator 26, which includes a stator core 40, an insulator 41, and a coil 42, into the inside of a main body portion 29 of the motor case 13, which has an insertion opening 34 on one axial side; supporting at least a portion of one axial side of the stator 26 with a support surface 80 of the main body portion 29 provided on the inside of the main body portion 29; supplying heated and melted synthetic resin to the inside of the main body portion 29 while at least a portion of the stator 26 is supported on the support surface 80; inserting the rotor 27, which rotates around the rotation axis AX relative to the stator 26, and the rotor shaft 28 fixed to the rotor 27 into the inside of the main body portion 29; and connecting a lid portion 30 to the main body portion 29 so as to cover the insertion opening 34.

[0163] In the above configuration, the motor 12 is positioned relative to the motor case 13 .

[0164] In this embodiment, the insulator 41 has a protruding portion 41A that protrudes radially outward from an end face of the stator core 40 on one axial side. The support surface 80 supports the protruding portion 41A.

[0165] In the above configuration, the protrusion 41A is supported by the support surface 80.

[0166] In this embodiment, the steps include inserting a stator 26 including a stator core 40, an insulator 41, and a coil 42 into the inside of a main body portion 29 of a motor case 13 having an insertion opening 34 on one axial side; pressing an end face of the stator core 40 on one axial side with a pin 82 of a mold; supplying heated and melted synthetic resin through a mold to the inside of the main body portion 29 while the end face of the stator core 40 is pressed by the pin 82; inserting a rotor 27 which rotates around a rotation axis AX relative to the stator 26 and a rotor shaft 28 fixed to the rotor 27 into the inside of the main body portion 29; and connecting a lid portion 30 to the main body portion 29 so as to cover the insertion opening 34.

[0167] In the above configuration, the motor 12 is positioned relative to the motor case 13. Also, since there is no need to place screws and washers for pressing the end faces of the stator core 40 inside the motor case 13, the motor assembly 11 is prevented from becoming large.

[0168] In this embodiment, the electric working machine 1 is equipped with: a stator 26 including a stator core 40, an insulator 41, and a coil 42; a motor 12 having a rotor 27 rotating about a rotation axis AX relative to the stator 26; and a rotor shaft 28 fixed to the rotor 27; a saw chain 10 which is an output part driven by the rotor shaft 28; a main body portion 29 having an insertion opening 34 on one axial side; and a lid portion 30 connected to the main body portion 29 so as to cover the insertion opening 34; a motor case 13 in which the stator 26 and the rotor 27 are housed; a resin portion 25 housed in the motor case 13 so as to cover at least a portion of the motor 12; a waterproof member 65 arranged in a wiring passage 67 provided in the motor case 13 so as to connect the internal space of the motor case 13 to the external space; a connection terminal 51 arranged inside the waterproof member 65 and connected to the coil 42; and a power line 53 connected to the connection terminal 51 by an adhesive 64 inside the waterproof member 65.

[0169] In the above-described configuration, the motor 12 housed in the motor case 13 is waterproofed. Furthermore, the assembly of the motor assembly 11 is made easier.

[0170] In this embodiment, the wire passage 67 is provided in the main body portion 29 .

[0171] In the above configuration, the power line 53 is smoothly routed.

[0172] In this embodiment, the waterproof member 65 has a cup portion 65A. The connection terminal 51 and the power line 53 are fixed by an adhesive 64 inside the cup portion 65A.

[0173] The above-described configuration prevents moisture from entering the internal space from the external space of the motor case 13. Furthermore, the assembly of the motor assembly 11 is made easier.

[0174] In this embodiment, the adhesive 64 is filled inside the cup portion 65A.

[0175] With the above configuration, the intrusion of moisture from the external space of the motor case 13 into the internal space is suppressed.

[0176] In this embodiment, a seal member 68 is provided to seal the boundary between the outer surface of the waterproof member 65 and the inner surface of the wire passage 67 .

[0177] With the above configuration, the intrusion of moisture from the external space of the motor case 13 into the internal space is suppressed.

[0178] In this embodiment, the stator 26 includes a busbar unit 43 fixed to the insulator 41. The busbar unit 43 has an external terminal 47 fixed to a connection terminal 51 by a terminal screw 52, ​​a fusing terminal 48 connected to the coil 42, a short-circuit member 49 connecting the external terminal 47 and the fusing terminal 48, and an insulating member 50 covering the short-circuit member 49.

[0179] In the above configuration, the connection terminal 51 and the coil 42 are connected via the bus bar unit 43.

[0180] In this embodiment, when the connection terminal 51 is fixed to the external terminal 47 by the terminal screw 52, ​​the waterproof member 65 moves toward the center of the motor case 13, and the outer surface of the waterproof member 65 and the inner surface of the wiring passage 67 each come into close contact with the sealing member 68.

[0181] In the above-described configuration, the motor 12 housed in the motor case 13 is waterproofed. Furthermore, the assembly of the motor assembly 11 is made easier.

[0182] In this embodiment, the electric working machine 1 has a stator 26 including a stator core 40, an insulator 41 and a coil 42, a motor 12 having a rotor 27 rotating around a rotation axis AX relative to the stator 26 and a rotor shaft 28 fixed to the rotor 27, a saw chain 10 which is an output part driven by the rotor shaft 28, a main body portion 29 having an insertion opening 34 on one axial side, and a lid portion 30 connected to the main body portion 29 so as to close the insertion opening 34, a motor case 13 in which the stator 26 and the rotor 27 are housed, a resin portion 25 housed in the motor case 13 so as to cover at least a portion of the motor 12, a waterproof member 65 arranged in a wiring passage 67 provided in the motor case 13 so as to connect the internal space of the motor case 13 to the external space, a connection terminal 51 fixed to the waterproof member 65, an external terminal 47 fixed to the stator 26, and a terminal screw 52 for fixing the connection terminal 51 and the external terminal 47. When the connection terminal 51 is fixed to the external terminal 47 by the terminal screw 52 , the waterproof member 65 moves toward the center of the motor case 13 .

[0183] In the above-described configuration, the motor 12 housed in the motor case 13 is waterproofed. Furthermore, the assembly of the motor assembly 11 is made easier.

[0184] In this embodiment, the connection terminal 51 is fixed to the waterproof member 65 by an adhesive 64 .

[0185] The above-described configuration prevents moisture from entering the internal space from the external space of the motor case 13. Furthermore, the assembly of the motor assembly 11 is made easier.

[0186] In this embodiment, the electric working machine 1 is equipped with a motor 12 having a stator 26 including a stator core 40, an insulator 41, and a coil 42, a rotor 27 rotating around a rotation axis AX relative to the stator 26, and a rotor shaft 28 fixed to the rotor 27, a sensor board 19 supporting a magnetic sensor 59 that detects rotation of the rotor 27, a saw chain 10 that is an output part driven by the rotor shaft 28, a main body portion 29 having an insertion opening 34 on one axial side, and a lid portion 30 connected to the main body portion 29 so as to close the insertion opening 34, a motor case 13 in which the stator 26, the rotor 27, and the sensor board 19 are housed, a resin part 25 housed in the motor case 13 so as to cover at least a portion of the motor 12, a waterproof member 71 arranged in a wiring passage 73 provided in the lid portion 30 so as to connect the internal space of the motor case 13 to the external space, and a signal line 63 connected to the sensor board 19 and fixed by adhesive 70 inside the waterproof member 71.

[0187] In the above-described configuration, the motor 12 housed in the motor case 13 is waterproofed. Furthermore, the assembly of the motor assembly 11 is made easier.

[0188] In this embodiment, the waterproof member 71 has a cup portion 71 A. The adhesive 70 is filled inside the cup portion 71A.

[0189] The above-described configuration prevents moisture from entering the internal space from the external space of the motor case 13. Furthermore, the assembly of the motor assembly 11 is made easier.

[0190] In this embodiment, a seal member 74 is provided to seal the boundary between the outer surface of the waterproof member 71 and the inner surface of the wire passage 73 .

[0191] With the above configuration, the intrusion of moisture from the external space of the motor case 13 into the internal space is suppressed.

[0192] [Second embodiment] A second embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0193] Fig. 23 is an exploded perspective view showing a stator 226 according to this embodiment. Fig. 24 is a cross-sectional perspective view showing a stator 226 according to this embodiment.

[0194] In this embodiment, the insulator 241 includes a first insulator 241A covering a part of the upper stator core 40 and a second insulator 241B covering a part of the lower stator core 40. The first insulator 241A covers an upper part of the stator core 40 but does not cover an axial intermediate part of the stator core 40 or a lower part of the stator core 40. The second insulator 241B covers the lower part of the stator core 40 but does not cover an axial intermediate part of the stator core 40 or an upper part of the stator core 40.

[0195] That is, the first insulator 241A is provided so as to cover a part of the coil support surface of the upper tooth 45. The second insulator 241B is provided so as to cover a part of the coil support surface of the lower tooth 45. An axial middle portion of the coil support surface of the tooth 45 is exposed from the insulator 241. In addition, an axial middle portion of the inner circumferential surface of the yoke 44 is also exposed from the insulator 241.

[0196] Resin portion 25 contacts the surface of stator core 40 between first insulator 241A and second insulator 241B. Resin portion 25 is disposed between the coil and the coil support surface of tooth 45 at the axial middle portion.

[0197] According to this embodiment, the contact area between the resin portion 25 and the stator core 40 is increased, and therefore heat from the stator core 40 is easily transferred to the motor case 13 via the resin portion 25. In other words, the heat dissipation effect of the stator core 40 by the resin portion 25 is improved.

[0198] As described above, in this embodiment, the insulator 241 includes the first insulator 241A covering a portion of the stator core 40 on one axial side, and the second insulator 241B covering a portion of the stator core 40 on the other axial side. The resin portion 25 contacts the surface of the stator core 40 between the first insulator 241A and the second insulator 241B.

[0199] In the above configuration, heat from stator core 40 is dissipated to the periphery of motor case 13 via resin portion 25 .

[0200] In this embodiment, the stator core 40 has a yoke 44 and teeth 45 protruding radially inward from the yoke 44. The coils 42 are arranged around the coil support surfaces of the teeth 45. The first insulator 241A is provided so as to cover a portion of the coil support surface of the teeth 45 on one axial side. The second insulator 241B is provided so as to cover a portion of the coil support surface of the teeth 45 on the other axial side. The resin part 25 is arranged between the coils 42 and the coil support surface of the teeth 45 at the axial middle portion.

[0201] In the above configuration, the contact area between the stator core 40 and the resin part 25 is large, and the contact area between the coil 42 and the resin part 25 is also large, so that heat from the stator core 40 and the coil 42 is dissipated to the surroundings of the motor case 13 via the resin part 25.

[0202] In this embodiment, the thermal conductivity of the resin portion 25 is higher than the thermal conductivity of the insulator 41 .

[0203] In the above configuration, the heat of the motor 12 is dissipated to the periphery of the motor case 13 via the resin portion 25 .

[0204] [Third embodiment] A third embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0205] Fig. 25 is a perspective view showing a busbar unit 343 according to this embodiment. Fig. 26 is an exploded perspective view showing a busbar unit 343 according to this embodiment.

[0206] In this embodiment, the insulating member 350 of the busbar unit 343 covers a portion of the surface of the short-circuit member 49. The insulating member 350 has an opening 84 that exposes a portion of the surface of the short-circuit member 49. A plurality of openings 84 are provided on each of the upper and lower surfaces of the insulating member 350. A plurality of openings 84 are provided at intervals in the circumferential direction on the upper surface of the insulating member 350. A plurality of openings 84 are provided at intervals in the circumferential direction on the lower surface of the insulating member 350.

[0207] The resin portion 25 contacts the surface of the short-circuit member 49 through the opening 84. As in the above-described embodiment, the resin portion 25 covers both the surface of the insulating member 350 and the surface of the fusing terminal 48.

[0208] According to this embodiment, the contact area between the resin portion 25 and the short-circuit member 49 is increased, and therefore heat from the short-circuit member 49 is easily transferred to the motor case 13 via the resin portion 25. In other words, the heat dissipation effect of the short-circuit member 49 by the resin portion 25 is improved.

[0209] As described above, in this embodiment, the stator 26 includes the busbar unit 343 fixed to the insulator 41. The busbar unit 343 has an external terminal 47 connected to the power line 53 via the connection terminal 51, a fusing terminal 48 connected to the coil 42, a short-circuit member 49 connecting the external terminal 47 and the fusing terminal 48, and an insulating member 350 covering a part of the short-circuit member 49.

[0210] In the above configuration, a portion of the short-circuit member 49 is covered with the insulating member 350 and a portion of the short-circuit member 49 is in contact with the resin portion 25, so that the heat of the short-circuit member 49 is dissipated to the periphery of the motor case 13 via the resin portion 25.

[0211] In this embodiment, the insulating member 350 has an opening 84 that exposes a part of the short-circuit member 49. The resin portion 25 comes into contact with the short-circuit member 49 through the opening 84.

[0212] In the above configuration, the resin portion 25 contacts the short-circuit member 49 through the opening 84 of the insulating member 350 , so that the heat of the short-circuit member 49 is dissipated to the periphery of the motor case 13 through the resin portion 25 .

[0213] In this embodiment, the resin portion 25 covers the insulating member 350 and the fusing terminal 48 .

[0214] In the above configuration, the heat of the fusing terminal 48 is dissipated to the periphery of the motor case 13 via the resin portion 25 .

[0215] [Fourth embodiment] A fourth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0216] FIG. 27 is a cross-sectional view showing a partitioning rib 481 according to the present embodiment. FIG. 27 is a view corresponding to the cross-sectional view shown in FIG. 20. The partitioning rib 481 is disposed between a pair of adjacent external terminals 47. In the present embodiment, the partitioning rib 481 is formed by a resin portion 25. The partitioning rib 481 is supported by an insulating member 450 of the busbar unit. The height of the upper surface of the insulating member 450 is substantially equal to the height of the upper surface of the external terminal 47. In the present embodiment, a recess 85 is provided on the upper surface of the insulating member 450. The recess 85 is recessed downward from the upper surface of the insulating member 450. In the left-right direction, the recess 85 is disposed between a pair of adjacent external terminals 47. At least a part of the resin portion 25 is disposed inside the recess 85. Since the resin portion 25 enters the recess 85, the insulation distance between the pair of adjacent external terminals 47 is increased.

[0217] As described above, in this embodiment, the stator 26 includes a busbar unit fixed to the insulator 41. The busbar unit has an external terminal 47 connected to the power line 53 via a connection terminal 51, a fusing terminal 48 connected to the coil 42, a short-circuiting member 49 connecting the external terminal 47 and the fusing terminal 48, and an insulating member 450 covering at least a part of the short-circuiting member 49. The multiple external terminals 47 are arranged adjacent to each other. A partitioning rib 481 is arranged between a pair of adjacent external terminals 47. The partitioning rib 481 is formed of the resin part 25.

[0218] The above configuration suppresses the occurrence of burrs in the resin part 25 at the partitioning rib 481. That is, if partitioning rib 481 is formed only from insulating member 450, a part of resin part 25 may remain as a thin film on the surface of insulating member 450, which may result in the occurrence of burrs in the resin part 25. By actively forming partitioning rib 481 from resin part 25, resin part 25 is properly molded, thereby suppressing the occurrence of burrs.

[0219] In this embodiment, the partition rib 481 is supported by the insulating member 450 .

[0220] In the above configuration, the insulating member 450 suppresses a decrease in strength of the partitioning rib 481. That is, if the strength of the resin part 25 is low, the strength of the partitioning rib 481 will decrease if the partitioning rib 481 is formed only from the resin part 25. Since the partitioning rib 481 is supported by the insulating member 450, a decrease in strength of the partitioning rib 481 is suppressed.

[0221] [Fifth embodiment] A fifth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0222] Fig. 28 is an exploded perspective view showing a first holding mechanism 523 according to this embodiment. Fig. 29 is a cross-sectional view showing a first holding mechanism 523 according to this embodiment. Note that in Figs. 28 and 29, the resin portion 25 is omitted.

[0223] The first holding mechanism 523 has a waterproof member 564 that holds the connection terminal 51 and the power line 53. The waterproof member 564 is made of flexible synthetic resin. The connection terminal 51 and the power line 53 are each arranged inside the waterproof member 564. The connection terminal 51 and the power line 53 are integrally molded into the waterproof member 564. The waterproof member 564 has holes 566 in which the power line 53 is arranged. Three holes 566 are provided. The three holes 566 are provided parallel to each other. There are three power lines 53. A power line 53 is arranged in each of the three holes 566. The outer surface of the power line 53 and the inner surface of the hole 566 are in close contact with each other.

[0224] The waterproof member 564 is disposed in the wire passage 67. The waterproof member 564 has a lip seal portion 86 including a plurality of protrusions. The boundary between the waterproof member 564 and the inner surface of the wire passage 67 is sealed by the lip seal portion 86.

[0225] With the power line 53 and the connection terminal 51 connected, the external terminal 47 and the connection terminal 51 are fixed by the terminal screw 52. When the terminal screw 52 is tightened and the connection terminal 51 is fixed to the external terminal 47, the waterproof member 564 moves toward the center of the motor case 13. As the waterproof member 564 moves, the waterproof member 564 is fixed in a state of being in close contact with the main body 29.

[0226] As described above, in this embodiment as well, the motor 12 housed in the motor case 13 is waterproofed. The intrusion of moisture from the external space of the motor case 13 into the internal space is suppressed. Furthermore, the assembly of the motor assembly 11 is made easier.

[0227] [Sixth embodiment] A sixth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0228] Fig. 30 is an exploded perspective view showing a first holding mechanism 623 according to this embodiment. Fig. 31 is a cross-sectional view showing a first holding mechanism 623 according to this embodiment. Note that in Figs. 30 and 31, illustration of the resin portion 25 is omitted.

[0229] The first holding mechanism 623 has a waterproof member 664 that holds the connection terminal 51 and the power line 53. The waterproof member 664 is made of flexible synthetic resin. The connection terminal 51 and the power line 53 are each arranged inside the waterproof member 664. The connection terminal 51 and the power line 53 are integrally molded into the waterproof member 664. The waterproof member 664 has a hole 666 in which the power line 53 is arranged. Three holes 666 are provided. The three holes 666 are provided parallel to each other. There are three power lines 53. A power line 53 is arranged in each of the three holes 666. The outer surface of the power line 53 and the inner surface of the hole 666 are in close contact with each other.

[0230] In this embodiment, the seal member 665 is disposed in front of the waterproof member 564. The waterproof member 564 and the seal member 665 are integrally molded. The waterproof member 564 and the seal member 665 may be separate bodies. The seal member 665 is made of rubber. The seal member 665 is a lip seal that surrounds the front of the waterproof member 564.

[0231] The waterproof member 664 and the seal member 665 are disposed in the wire passage 67. The seal member 665 is disposed between the waterproof member 664 and the main body 29. The boundary between the waterproof member 664 and the inner surface of the wire passage 67 is sealed by the seal member 665.

[0232] With the power line 53 and the connection terminal 51 connected, the external terminal 47 and the connection terminal 51 are fixed by the terminal screw 52. When the terminal screw 52 is tightened to fix the connection terminal 51 to the external terminal 47, the waterproof member 664 moves toward the center of the motor case 13. As the waterproof member 664 moves, the waterproof member 664 is fixed in a state of being in close contact with the main body 29 via the seal member 665.

[0233] As described above, in this embodiment as well, the motor 12 housed in the motor case 13 is waterproofed. The intrusion of moisture from the external space of the motor case 13 into the internal space is suppressed. Furthermore, the assembly of the motor assembly 11 is made easier.

[0234] [Seventh embodiment] A seventh embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0235] Fig. 32 is an exploded perspective view showing a first holding mechanism 723 according to this embodiment. Fig. 33 is a cross-sectional view showing a first holding mechanism 723 according to this embodiment. Note that in Figs. 32 and 33, illustration of the resin portion 25 is omitted.

[0236] The first holding mechanism 723 is disposed in the wiring passage 67 and has a waterproof member 765 that holds the connection terminal 51, and a rubber member 764 that is disposed inside the waterproof member 765 and holds the power line 53. A rear portion of the connection terminal 51 is disposed inside the waterproof member 765. The power line 53 is connected to the connection terminal 51 inside the waterproof member 765.

[0237] The outer periphery of the rubber member 764 is a lip seal portion. The boundary between the rubber member 764 and the inner periphery of the waterproof member 765 is sealed by a lip seal portion provided on the outer periphery of the rubber member 764. The rubber member 764 has holes 766 in which the power lines 53 are disposed. Three holes 766 are provided. The three holes 766 are provided parallel to each other. There are three power lines 53. A power line 53 is disposed in each of the three holes 766. The outer surface of the power line 53 and the inner surface of the hole 766 are in close contact with each other.

[0238] The waterproof member 765 is disposed in the wire passage 67. The seal member 68 is disposed between the waterproof member 765 and the main body 29. The boundary between the waterproof member 765 and the inner surface of the wire passage 67 is sealed by the seal member 68.

[0239] With the power line 53 and the connection terminal 51 connected, the external terminal 47 and the connection terminal 51 are fixed by the terminal screw 52. When the terminal screw 52 is tightened to fix the connection terminal 51 to the external terminal 47, the waterproof member 664 moves toward the center of the motor case 13. As the waterproof member 664 moves, the waterproof member 664 is fixed in a state of being in close contact with the main body 29 via the seal member 665.

[0240] As described above, in this embodiment as well, the motor 12 housed in the motor case 13 is waterproofed. The intrusion of moisture from the external space of the motor case 13 into the internal space is suppressed. Furthermore, the assembly of the motor assembly 11 is made easier.

[0241] [Eighth embodiment] An eighth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0242] Fig. 34 is an exploded perspective view showing a first holding mechanism 823 according to this embodiment. Fig. 35 is a cross-sectional view showing a first holding mechanism 823 according to this embodiment. Note that in Figs. 34 and 35, illustration of the resin portion 25 is omitted.

[0243] The first holding mechanism 823 has a rubber member 864 arranged in a wire passage 867 of the main body 29. The rubber member 864 holds the power line 53. The power line 53 is connected to the connection terminal 51 inside the wire passage 867.

[0244] The outer periphery of the rubber member 864 is a lip seal portion. The boundary between the rubber member 864 and the inner periphery of the wiring passage 867 is sealed by a lip seal portion provided on the outer periphery of the rubber member 864. The rubber member 864 has holes 866 in which the power wires 53 are disposed. Three holes 866 are provided. The three holes 866 are provided parallel to each other. There are three power wires 53. A power wire 53 is disposed in each of the three holes 866. The outer surface of the power wires 53 and the inner surface of the hole 866 are in close contact with each other.

[0245] With the power line 53 and the connection terminal 51 connected, the external terminal 47 and the connection terminal 51 are fixed by the terminal screw 52. When the terminal screw 52 is tightened and the connection terminal 51 is fixed to the external terminal 47, the rubber member 864 moves toward the center of the motor case 13. As the rubber member 864 moves, the rubber member 864 is fixed in a state of being in close contact with the main body portion 29.

[0246] As described above, in this embodiment as well, the motor 12 housed in the motor case 13 is waterproofed. The intrusion of moisture from the external space of the motor case 13 into the internal space is suppressed. Furthermore, the assembly of the motor assembly 11 is made easier.

[0247] [Ninth embodiment] A ninth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0248] Fig. 36 is an exploded perspective view showing a first holding mechanism 923 according to this embodiment. Fig. 37 is a cross-sectional view showing a first holding mechanism 923 according to this embodiment. Note that in Figs. 36 and 37, illustration of the resin portion 25 is omitted.

[0249] The first holding mechanism 923 is disposed in the wiring passage 67 of the main body 29 and has a waterproof member 965 that holds the connection terminal 51 , and a heat shrink tube 964 that fixes the connection terminal 51 and the power line 53 on the outside of the waterproof member 965 .

[0250] The waterproof member 965 is made of synthetic resin. The boundary between the outer circumferential surface of the waterproof member 965 and the inner circumferential surface of the wire passage 67 is sealed by a seal member 68. The rear portion of the connection terminal 51 protrudes rearward from the rear portion of the waterproof member 965.

[0251] The heat shrink tube 964 fixes the connection terminal 51 and the power line 53 on the outside of the motor case 13. The heat shrink tube 964 is arranged around the connection terminal 51 and around the power line 53. When the connection terminal 51 and the power line 53 are connected, the heat shrink tube 964 arranged around the connection terminal 51 and around the power line 53 is heated, whereby the heat shrink tube 964 shrinks and fixes the connection terminal 51 and the power line 53. By providing an adhesive on the inner surface of the heat shrink tube 964, the connection terminal 51 and the power line 53 are fixed more sufficiently.

[0252] As described above, in this embodiment as well, the motor 12 housed in the motor case 13 is waterproofed. The intrusion of moisture from the external space of the motor case 13 into the internal space is suppressed. Furthermore, the assembly of the motor assembly 11 is made easier.

[0253] [Tenth embodiment] A tenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0254] Fig. 38 is an exploded perspective view showing the second holding mechanism 1024 according to this embodiment. Fig. 39 is a cross-sectional view showing the second holding mechanism 1024 according to this embodiment. Note that in Figs. 38 and 39, the resin portion 25 is omitted.

[0255] The second holding mechanism 1024 has a waterproof member 71 arranged in the wire passage 73 of the lid portion 30 , and a rubber member 1070 arranged inside the waterproof member 71 to hold the signal wire 63 .

[0256] The outer periphery of the rubber member 1070 is a lip seal portion. The boundary between the rubber member 1070 and the inner periphery of the waterproof member 71 is sealed by a lip seal portion provided on the outer periphery of the rubber member 1070. The rubber member 1070 has holes 1072 in which the signal lines 63 are disposed. Five holes 1072 are provided. The five holes 1072 are provided parallel to one another. There are five signal lines 63. A signal line 63 is disposed in each of the five holes 1072. The outer surface of the signal line 63 and the inner surface of the hole 1072 are in close contact with each other.

[0257] The waterproof member 71 is disposed in the wire passage 73. The seal member 74 is disposed between the waterproof member 71 and the cover portion 30. The boundary between the waterproof member 71 and the inner surface of the wire passage 73 is sealed by the seal member 74.

[0258] As described above, in this embodiment as well, the motor 12 housed in the motor case 13 is waterproofed. The intrusion of moisture from the external space of the motor case 13 into the internal space is suppressed. Furthermore, the assembly of the motor assembly 11 is made easier.

[0259] [Eleventh embodiment] An eleventh embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0260] Fig. 40 is an exploded perspective view showing the second holding mechanism 1124 according to this embodiment. Fig. 40 is a cross-sectional view showing the second holding mechanism 1124 according to this embodiment. Note that illustration of the resin portion 25 is omitted in Figs. 40 and 41.

[0261] The second holding mechanism 1124 has a rubber member 1170 that is disposed in the wire passage 73 of the cover 30. The rubber member 1170 holds the signal wire 63.

[0262] The outer periphery of the rubber member 1170 is a lip seal portion. The boundary between the rubber member 1170 and the inner periphery of the wire passage 73 is sealed by the lip seal portion provided on the outer periphery of the rubber member 1170. The rubber member 1170 has a hole 1172 in which the signal wire 63 is disposed. The outer surface of the signal wire 63 and the inner surface of the hole 1172 are in close contact with each other.

[0263] As described above, in this embodiment as well, the motor 12 housed in the motor case 13 is waterproofed. The intrusion of moisture from the external space of the motor case 13 into the internal space is suppressed. Furthermore, the assembly of the motor assembly 11 is made easier.

[0264] [Twelfth embodiment] A twelfth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0265] Fig. 42 is a perspective view showing the second holding mechanism 1224 according to this embodiment. Fig. 43 is a cross-sectional view showing the second holding mechanism 1224 according to this embodiment. Note that in Figs. 42 and 43, the resin portion 25 is omitted.

[0266] The second holding mechanism 1224 has a waterproof member 1271 arranged in the wire passage 73 of the cover portion 30, and a heat shrink tube 1270 that seals the boundary between the waterproof member 1271 and the signal wire 63 on the outside of the waterproof member 1271.

[0267] The waterproof member 1271 is made of synthetic resin. The boundary between the outer circumferential surface of the waterproof member 1271 and the inner circumferential surface of the wire passage 73 is sealed by a seal member 74.

[0268] The heat shrink tube 1270 fixes the waterproof member 1271 and the signal line 63 on the outside of the motor case 13. In this embodiment, the waterproof member 1271 has a pipe portion 88 arranged around one signal line 63. The pipe portion 88 is provided so as to protrude upward from the bottom surface of the cup portion of the waterproof member 1271. The heat shrink tube 1270 is arranged around the pipe portion 88 and around the signal line 63. With the signal line 63 arranged inside the pipe portion 88, the heat shrink tube 1270 arranged around the pipe portion 88 and around the signal line 63 is heated, whereby the heat shrink tube 1270 shrinks, the pipe portion 88 and the signal line 63 are fixed, and the boundary between the pipe portion 88 and the signal line 63 is sealed. By providing an adhesive on the inner surface of the heat shrink tube 1270, the pipe portion 88 and the signal line 63 are fixed more sufficiently.

[0269] As described above, in this embodiment as well, the motor 12 housed in the motor case 13 is waterproofed. The intrusion of moisture from the external space of the motor case 13 into the internal space is suppressed. Furthermore, the assembly of the motor assembly 11 is made easier.

[0270] [Thirteenth embodiment] A thirteenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0271] Fig. 44 is an exploded perspective view showing the second holding mechanism 1324 according to this embodiment. Fig. 45 is a cross-sectional view showing the second holding mechanism 1324 according to this embodiment. Note that in Figs. 44 and 45, the resin portion 25 is omitted.

[0272] The second holding mechanism 1324 has a waterproof member 1371 arranged in a wire passage 1373 of the lid portion 30, and a holding member 1370 arranged inside the waterproof member 1371 and holding the signal line 63. The holding member 1370 is arranged inside the cup portion of the waterproof member 1371.

[0273] The holding member 1370 may be an adhesive, a rubber material, or a flexible resin such as a low-temperature, low-pressure molding resin. The holding member 1370 has a hole 1372 in which the signal line 63 is disposed. The outer peripheral surface of the holding member 1370 and the inner peripheral surface of the waterproof member 1371 are in close contact with each other.

[0274] The waterproof member 1371 supports the holding member 1370. The waterproof member 1371 has a snap fit 1375 that is hooked onto at least a part of the lid portion 30. The waterproof member 1371 is fixed to the lid portion 30 by hooking the snap fit 1375 onto an engagement portion provided on the inside of the wire passage 1373. The waterproof member 1371 is removed from the lid portion 30 by releasing the engagement between the snap fit 1375 and the engagement portion of the wire passage 1373. The waterproof member 1371 is attached to and detached from the lid portion 30. The boundary between the outer circumferential surface of the waterproof member 1371 and the inner circumferential surface of the wire passage 1373 is sealed by a seal member 1374.

[0275] As described above, in this embodiment as well, the motor 12 housed in the motor case 13 is waterproofed. The intrusion of moisture from the external space of the motor case 13 into the internal space is suppressed. Furthermore, the assembly of the motor assembly 11 is made easier.

[0276] [Fourteenth embodiment] A fourteenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0277] Fig. 46 is a cross-sectional view showing a part of the motor assembly 11 according to this embodiment. Fig. 47 is an enlarged cross-sectional view of a part of the motor assembly 11 according to this embodiment. Fig. 48 is an exploded perspective view showing the motor 12 and the sensor board 1419 according to this embodiment. Fig. 49 is a perspective view showing a part of the motor assembly 11 according to this embodiment.

[0278] As in the above-described embodiment, the sensor board 1419 includes a circuit board 60 on which the magnetic sensor 59 is mounted, and a resin film 61 that covers at least a portion of the surface of the magnetic sensor 59 and the circuit board 60. In this embodiment, the sensor board 1419 is fixed to the stator 26 of the motor 12. The sensor board 1419 is fixed to the upper side of the stator 26. In other words, the sensor board 1419 is fixed to an upper part of the stator 26 close to the insertion port 34.

[0279] Stator 26 has an insulator 41 and a busbar unit 1443 fixed to insulator 41. Busbar unit 1443 has an insulating member 1450. Busbar unit 1443 is fixed to the upper side of insulator 41. Busbar unit 1443 is fixed to an upper part of insulator 41 close to insertion port 34. Busbar unit 1443 is fixed to an upper part of insulator 41 close to insertion port 34. Insulating member 1450 of busbar unit 1443 is fixed to the upper part of insulator 41 by busbar screws 46.

[0280] The sensor board 1419 is disposed above the bus bar unit 1443. In this embodiment, the sensor board 1419 is fixed to the bus bar unit 1443. The sensor board 1419 is fixed to the insulating member 1450 of the bus bar unit 1443 by three board screws 1462. In this embodiment, the insulating member 1450 has a screw boss portion 89 that protrudes radially inward. The board screws 1462 are inserted into screw holes provided in the screw boss portion 89 through openings provided in the sensor board 1419.

[0281] In this embodiment, the signal lines connecting the sensor board 1419 and the controller 6 include a signal line 63 (first signal line) connected to the sensor board 1419, and a signal line 1463 (second signal line) connected to the first signal line 63 via a connector 90. Five signal lines 63 are provided. Five signal lines 1463 are also provided. The connector 90 is supported on the upper surface of the resin part 25 around the sensor board 1419.

[0282] In this embodiment, the first holding mechanism 1423 holds each of the power line 53 and the signal line 1463. The first holding mechanism 1423 has a waterproof member 1465 arranged in a wiring passage 67 provided in the main body 29, and a holding member 1464 that holds each of the power line 53 and the signal line 1463 inside the waterproof member 1465. The outer periphery of the holding member 1464 is in close contact with the inner periphery of the waterproof member 1465. The boundary between the outer surface of the waterproof member 1465 and the inner surface of the wiring passage 67 is sealed by a seal member 68.

[0283] The holding member 1464 may be an adhesive, a rubber member, or a flexible resin such as a low-temperature, low-pressure molding resin. The holding member 1464 holds at least a part of the connection terminal 51. The power line 53 and the connection terminal 51 are connected inside the holding member 1464. The power line 53 and the signal line 1463 are each held by the waterproof member 1465 via the holding member 1464.

[0284] As described above, in this embodiment, the electric working machine 1 includes the stator 26 including the stator core 40, the insulator 41, and the coil 42, the motor 12 including the rotor 27 rotating about the rotation axis AX relative to the stator 26, and the rotor shaft 28 fixed to the rotor 27, the sensor board 1419 supporting the magnetic sensor 59 detecting the rotation of the rotor 27, the saw chain 10 serving as an output section driven by the rotor shaft 28, the main body 29 having the insertion opening 34 on one axial side, and the lid 30 connected to the main body 29 so as to close the insertion opening 34, the motor case 13 in which the stator 26, the rotor 27, and the sensor board 1419 are housed, and the resin section 25 housed in the motor case 13 so as to cover at least a part of the motor 12. The sensor board 1419 is fixed to the stator 26.

[0285] In the above configuration, the sensor board 1419 is housed in the motor case 13 together with the stator 26, and therefore the sensor board 1419 is waterproofed by the motor case 13. When assembling the motor assembly 11, the sensor board 1419 together with the stator 26 can be inserted into the main body 29 from the insertion port 34, improving the ease of assembly of the motor assembly 11. Furthermore, the power line 53 connected to the motor 12 and the signal line 63 connected to the sensor board 1419 are disposed at approximately the same height, and therefore the power line 53 and the signal line 63 can be smoothly routed. For example, the power line 53 and the signal line 63 can be passed through the wiring passage 67 provided in the main body 29.

[0286] In this embodiment, the sensor board 1419 is fixed to one axial side of the stator 26.

[0287] In the above configuration, the sensor board 1419 is waterproofed by the motor case 13. Furthermore, the assembly of the motor assembly 11 is made easier.

[0288] In the present embodiment, the stator 26 includes a bus bar unit 1443 fixed to the insulator 41. The sensor board 1419 is fixed to the bus bar unit 1443.

[0289] With the above-described configuration, the motor assembly 11 can be assembled more easily.

[0290] In this embodiment, the bus bar unit 1443 is fixed to one axial side of the insulator 41.

[0291] With the above-described configuration, the motor assembly 11 can be assembled more easily.

[0292] In this embodiment, the sensor board 1419 is fixed to the bus bar unit 1443 by board screws 1462 .

[0293] With the above-described configuration, the motor assembly 11 can be assembled more easily.

[0294] In this embodiment, the electric operating machine 1 includes a waterproof member 1465 disposed in a wiring passage 67 provided in the main body 29 so as to connect the internal space of the motor case 13 with the external space. The power supply line 53 connected to the coil 42 and the signal line 1463 connected to the sensor board 1419 are each held by the waterproof member 1465.

[0295] In the above configuration, the motor 12 and the sensor board 1419 are waterproofed. Furthermore, the power line 53 and the signal line 1463 are each held by one waterproof member 1465. Since it is not necessary to provide a waterproof member for the power line 53 and a waterproof member for the signal line 1463 separately, the number of parts of the motor assembly 11 is reduced, and the cost of the motor assembly 11 is suppressed. Furthermore, the ease of assembly of the motor assembly 11 is improved.

[0296] In this embodiment, the signal lines include a signal line 63 connected to the sensor board 1419 and a signal line 1463 connected to the signal line 63 via a connector 90. The waterproof member 1465 holds the signal line 1463.

[0297] In the above configuration, for example, after the waterproof member 1465 holding the signal line 1463 is attached to the main body 29, the signal line 63 and the signal line 1463 can be connected via the connector 90, thereby improving the assembly of the motor assembly 11.

[0298] In this embodiment, the connector 90 is supported by the resin portion 25 around the sensor board 1419 .

[0299] In the above configuration, the connector 90 is in the correct position.

[0300] In this embodiment, the electric operating machine 1 includes a connection terminal 51 that is disposed inside a waterproof member 1465 and connected to the coil 42, and a holding member 1464 that holds the connection terminal 51 and the power line 53 inside the waterproof member 1465. The power line 53 is connected to the connection terminal 51 inside the holding member 1464.

[0301] The above configuration prevents moisture from entering the internal space from the external space of the motor case 13. Furthermore, the power supply line 53 and the connection terminal 51 are stably connected.

[0302] In this embodiment, the signal line 1463 is held by a holding member 1464 inside a waterproof member 1465 .

[0303] In the above configuration, the power supply line 53 and the signal line 1463 are each held by one holding member 1464, which reduces the number of parts of the motor assembly 11 and suppresses the cost of the motor assembly 11. In addition, the ease of assembly of the motor assembly 11 is improved.

[0304] In this embodiment, the outer periphery of the holding member 1464 is in close contact with the inner periphery of the waterproofing member 1465 .

[0305] With the above configuration, the intrusion of moisture from the external space of the motor case 13 into the internal space is suppressed.

[0306] In this embodiment, the retention member 1464 comprises an adhesive.

[0307] In the above configuration, the power line 53 and the signal line 1463 are fixed to the waterproof member 1465 by an adhesive.

[0308] In this embodiment, a seal member 68 that seals the boundary between the outer surface of the waterproof member 1465 and the inner surface of the wire passage 67 is provided.

[0309] With the above configuration, the intrusion of moisture from the external space of the motor case 13 into the internal space is suppressed.

[0310] [Fifteenth embodiment] A fifteenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0311] FIG. 50 is an enlarged cross-sectional view of a portion of the motor assembly 11 according to this embodiment.

[0312] As in the above-described embodiment, the sensor substrate 1519 includes a circuit substrate 60 on which the magnetic sensor 59 is mounted, and a resin film 61 that covers the magnetic sensor 59 and at least a portion of the surface of the circuit substrate 60 .

[0313] In this embodiment, the sensor board 1519 is disposed radially inside the busbar unit 43. The sensor board 1519 is disposed above the insulator 41. In this embodiment, the sensor board 1519 is fixed to the insulator 41. The sensor board 1519 is fixed to the upper side of the insulator 41. The sensor board 1519 is fixed to an upper part of the insulator 41 close to the insertion port 34. The sensor board 1519 is fixed to the upper part of the insulator 41 by board screws 1562.

[0314] As described above, in this embodiment, the sensor board 1519 is fixed to the insulator 41.

[0315] With the above-described configuration, the motor assembly 11 can be assembled more easily.

[0316] In this embodiment, the sensor board 1519 is fixed to one axial side of the insulator 41.

[0317] With the above-described configuration, the motor assembly 11 can be assembled more easily.

[0318] In this embodiment, the sensor board 1519 is fixed to the insulator 41 by board screws 1562 .

[0319] With the above-described configuration, the motor assembly 11 can be assembled more easily.

[0320] [Sixteenth embodiment] A sixteenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0321] Fig. 51 is a perspective view showing a part of the motor assembly 11 according to this embodiment. Fig. 52 is an enlarged cross-sectional view of a part of the motor assembly 11 according to this embodiment. Fig. 53 is a perspective view showing a sensor board 1619 according to this embodiment.

[0322] The sensor substrate 1619 has an inner peripheral surface facing radially inward. The magnetic sensor 59 is disposed on the inner peripheral surface of the sensor substrate 1619 facing radially inward. The dimension of the sensor substrate 1619 in the radial direction is smaller than the dimension of the sensor substrate 1619 in the axial direction. The dimension of the sensor substrate 1619 in the radial direction is the thickness of the sensor substrate 1619. The dimension of the sensor substrate 1619 in the axial direction is the height of the sensor substrate 1619.

[0323] The sensor substrate 1619 includes a flexible substrate 92. The flexible substrate 92 has a metal wiring pattern that connects the magnetic sensor 59 and the signal line 63. The flexible substrate 92 is disposed on the inner circumferential surface of the sensor substrate 1619. The flexible substrate 92 is disposed on the inner circumferential surface of the sensor substrate 1619 in a bent state. The magnetic sensor 59 is disposed on the flexible substrate 92. The magnetic sensor 59 is mounted on the flexible substrate 92.

[0324] Sensor board 1619 is fixed to bus bar unit 1643 by board screws 1462. Openings 91 into which board screws 1462 are inserted are provided on the outer periphery of sensor board 1619. Board screws 1462 are inserted into openings 91, and then inserted into screw holes provided in insulating member 1650 of bus bar unit 1643. Sensor board 1619 may be fixed to the upper part of insulator 41.

[0325] As described above, in this embodiment, the sensor substrate 1619 has an inner circumferential surface facing inward in the radial direction. The magnetic sensor 59 is disposed on the inner circumferential surface of the sensor substrate 1619.

[0326] With the above-described configuration, the motor assembly 11 can be assembled more easily.

[0327] In this embodiment, the dimension of the sensor substrate 1619 in the radial direction (the thickness of the sensor substrate 1619) is smaller than the dimension of the sensor substrate 1619 in the axial direction (the height of the sensor substrate 1619).

[0328] The above configuration improves the ease of assembly of the motor assembly 11. In addition, an increase in size of the sensor board 1619 in the radial direction is suppressed.

[0329] In this embodiment, the sensor substrate 1619 includes a flexible substrate 92. The magnetic sensor 59 is disposed on the flexible substrate 92.

[0330] The above configuration improves the ease of assembly of the motor assembly 11. In addition, an increase in size of the sensor board 1619 in the radial direction is suppressed.

[0331] [Seventeenth embodiment] A seventeenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0332] 54 is a perspective view showing a sensor substrate 1719 according to this embodiment. As with the sensor substrate 1619 according to the above-described sixteenth embodiment, the radial dimension of the sensor substrate 1719 is smaller than the axial dimension of the sensor substrate 1719. The magnetic sensor 59 is disposed on the inner circumferential surface of the sensor substrate 1719 facing radially inward.

[0333] In this embodiment, the sensor substrate 1719 does not include a flexible substrate. In this embodiment, the sensor substrate 1719 includes a molded circuit component (MID: Molded Interconnect Device). The wiring pattern provided on the sensor substrate 1719 is formed on the sensor substrate 1719 by the MID method. The sensor substrate 1719 is made of a synthetic resin applicable to the MID method. An example of a synthetic resin applicable to the MID method is a liquid crystal polymer. At least a part of the surface of the sensor substrate 1719 is irradiated with a laser beam, and at least a part of the surface of the sensor substrate 1719 is modified by the laser beam, and then the sensor substrate 1719 is plated to form a wiring pattern on the surface (inner peripheral surface) of the sensor substrate 1719.

[0334] [Eighteenth embodiment] An eighteenth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiments are given the same reference numerals, and the description of those components will be simplified or omitted.

[0335] Fig. 55 is a cross-sectional view showing a part of the motor assembly 11 according to this embodiment. Fig. 56 is a perspective view showing a part of the motor assembly 11 according to this embodiment.

[0336] In the above-described embodiment, the connector 90 that connects the signal line 63 and the signal line 1463 is disposed on the upper surface of the resin part 25. As shown in FIG. 55 and FIG. 56, the connector 93 that connects the signal line 63 and the signal line 1863 may be supported by the sensor board 1419. Like the signal line 1463 according to the above-described embodiment, the signal line 1863 is held by the first holding mechanism 1423 together with the power line 53. The signal line 1863 is connected to the signal line 63 via the connector 93. The connector 93 is disposed on the upper surface of the sensor board 1419. The sensor board 1419 is fixed to the insulating member 1450 of the bus bar unit 1443. The sensor board 1419 may be fixed to the upper part of the insulator 41.

[0337] As described above, in this embodiment, the connector 93 is supported by the sensor board 1419.

[0338] In the above configuration, the connector 93 is placed in the correct position.

[0339] [Other embodiments] In the above embodiment, the motor 12 is an inner rotor type brushless motor. The motor 12 may be an outer rotor type brushless motor. In an outer rotor type brushless motor, the teeth protrude radially outward from an annular yoke.

[0340] In the above-described embodiment, the electric working machine 1 is a chainsaw, which is a type of gardening tool. The gardening tool is not limited to a chainsaw. Examples of gardening tools include a hedge trimmer, a lawn mower, a grass cutter, and a blower. The electric working machine 1 may also be an electric tool. Examples of electric tools include a driver drill, a vibration driver drill, an angle drill, an impact driver, a grinder, a hammer, a hammer drill, a circular saw, and a reciprocating saw.

[0341] In the above-described embodiment, the battery pack attached to the battery attachment portion is used as the power source for the electric operating machine. A commercial power source (AC power source) may also be used as the power source for the electric operating machine. [Explanation of symbols]

[0342] 1...electric work machine, 2...housing, 2A...intake port, 2B...exhaust port, 3...front grip portion, 4...hand guard, 5...battery cover, 6...controller, 7...trigger lock lever, 8...trigger switch, 9...guide bar, 10...saw chain (output portion), 11...motor assembly, 12...motor, 13...motor case, 14...motor housing portion, 15...battery holding portion, 16...rear grip portion, 17...bearing, 18...bearing, 19...sensor board, 20...sealing member, 21...sealing member, 22...sealing member, 23...first holding mechanism, 24...second holding mechanism, 25...resin portion, 26...stator, 27...rotor, 28...rotor shaft, 29...main body, 30...lid, 31...tubular portion, 32...wall portion, 33...heat dissipation fin, 34...insertion port, 35...screw boss portion, 36...screw boss portion, 37...screw, 38...tubular portion, 39...tubular portion, 40...stator core, 41...insulator, 41A...projection portion, 42...coil, 43...busbar unit, 44...yoke, 45...teeth, 46...busbar screw, 47...external terminal, 48...fusing terminal, 49...short circuit member, 50...insulating member, 51...connection terminal, 52...terminal screw, 53...power line, 54...connection line, 5 5...rotor core, 56...rotor magnet, 57...hollow hole, 58...cylindrical member, 59...magnetic sensor, 60...circuit board, 61...resin film, 62...board screw, 63...signal line, 64...adhesive, 65...waterproof member, 65A...cup portion, 65B...retaining portion, 66...hole, 67...wiring passage, 68...sealing member, 69...partition wall, 70...adhesive, 71...waterproof member, 71A...cup portion, 71B...retaining portion, 72...hole, 73...wiring passage, 74...sealing member, 75...projection portion, 76...opening, 77...screw, 78...small diameter portion, 79...large diameter portion, 80...support surface, 81...partition rib, 81A...thick portion, 81B...thin portion, 82...pin, 83...recess, 84...opening, 85...recess, 86...lip seal portion, 88...pipe portion, 89...screw boss portion, 90...connector, 91...opening, 92...flexible board, 93...connector, 226...stator, 241...insulator, 241A...first insulator, 241B...second insulator, 343...busbar unit, 350...insulating member, 450...insulating member, 481...partition rib, 523...first holding mechanism, 564...waterproof member, 566...hole, 623...first holding mechanism, 664...waterproof member, 665...seal member, 666...hole, 723...first holding mechanism,764...rubber member, 765...waterproof member, 766...hole, 823...first holding mechanism, 864...rubber member, 866...hole, 867...wiring passage, 923...first holding mechanism, 964...heat shrink tube, 965...waterproof member, 1024...second holding mechanism, 1070...rubber member, 1072...hole, 1124...second holding mechanism, 1170...rubber member, 1172...hole, 1224...second holding mechanism, 1270...heat shrink tube, 1271...waterproof member, 1324...second holding mechanism, 1370...holding member, 1371...waterproof member, 1372...hole, 1373...wiring passage, 1374...sealing member, 1375...snap fit, 1419...sensor board, 1423...first holding mechanism, 1443...bus bar unit, 1450...insulating member, 1462...board screw, 1463...signal line, 1464...holding member, 1465...waterproof member, 1519...sensor board, 1562...board screw, 1619...sensor board, 1643...bus bar unit, 1650...insulating member, 1719...sensor board, 1863...signal line, AX...rotating shaft.

Claims

1. a motor including a stator including a stator core, an insulator, and a coil, a rotor that rotates about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor; an output section driven by the rotor shaft; a motor case including a main body having an insertion opening on one axial side and a lid connected to the main body so as to close the insertion opening, the motor case housing the stator and the rotor; a resin portion accommodated in the motor case so as to cover at least a portion of the motor; a waterproof member disposed in a wiring passage provided in the motor case so as to connect an internal space and an external space of the motor case; a connection terminal disposed inside the waterproof member and connected to the coil; a power line connected to the connection terminal by welding inside the waterproof member, Electric work equipment.

2. The wiring passage is provided in the main body portion. The electric operating machine according to claim 1 .

3. The waterproof member has a cup portion, the connection terminal and the power line are fixed to the inside of the cup portion by welding; The electric operating machine according to claim 2.

4. The adhesive is filled inside the cup portion. The electric operating machine according to claim 3.

5. a seal member for sealing the boundary between an outer surface of the waterproof member and an inner surface of the wiring passage; The electric operating machine according to claim 1 .

6. the stator includes a busbar unit fixed to the insulator, The bus bar unit includes an external terminal fixed to the connection terminal by a screw, a fusing terminal connected to the coil, a short-circuiting member connecting the external terminal and the fusing terminal, and an insulating member covering the short-circuiting member. The electric operating machine according to claim 5.

7. When the connection terminal is fixed to the external terminal by the screw, the waterproof member moves toward the center of the motor case, and an outer surface of the waterproof member and an inner surface of the wiring passage are brought into close contact with the seal member. The electric operating machine according to claim 6.

8. a motor including a stator including a stator core, an insulator, and a coil, a rotor that rotates about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor; an output section driven by the rotor shaft; a motor case including a main body having an insertion opening on one axial side and a lid connected to the main body so as to close the insertion opening, the motor case housing the stator and the rotor; a resin portion accommodated in the motor case so as to cover at least a portion of the motor; a waterproof member disposed in a wiring passage provided in the motor case so as to connect an internal space and an external space of the motor case; A connection terminal fixed to the waterproof member; an external terminal fixed to the stator; a screw for fixing the connection terminal and the external terminal, The waterproof member fitted in the wiring passage is fixed by the screw. Electric work equipment.

9. The connection terminal is fixed to the waterproof member by an adhesive. The electric operating machine according to claim 8.

10. The waterproof member is made of a synthetic resin, The connection terminal is integrally molded with the waterproof member. The electric operating machine according to claim 8.

11. a seal member disposed between the waterproof member and the motor case; The electric operating machine according to claim 10.

12. The waterproof member is made of rubber. The electric operating machine according to claim 8.

13. a motor including a stator including a stator core, an insulator, and a coil, a rotor that rotates about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor; an output section driven by the rotor shaft; a motor case including a main body having an insertion opening on one axial side and a lid connected to the main body so as to close the insertion opening, the motor case housing the stator and the rotor; a resin portion accommodated in the motor case so as to cover at least a portion of the motor; a waterproof member disposed in a wiring passage provided in the motor case so as to connect an internal space and an external space of the motor case; a connection terminal disposed inside the waterproof member and connected to the coil; a rubber member disposed inside the waterproof member and holding a power line connected to the connection terminal. Electric work equipment.

14. a motor including a stator including a stator core, an insulator, and a coil, a rotor that rotates about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor; an output section driven by the rotor shaft; a motor case including a main body having an insertion opening on one axial side and a lid connected to the main body so as to close the insertion opening, the motor case housing the stator and the rotor; a resin portion accommodated in the motor case so as to cover at least a portion of the motor; a waterproof member disposed in a wiring passage provided in the motor case so as to connect an internal space and an external space of the motor case; a connection terminal held by the waterproof member and connected to the coil; a power line fixed to the connection terminal by a heat shrink tube on the outside of the waterproof member, Electric work equipment.

15. a motor including a stator including a stator core, an insulator, and a coil, a rotor that rotates about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor; a sensor substrate supporting a magnetic sensor for detecting rotation of the rotor; an output section driven by the rotor shaft; a motor case including a main body having an insertion opening on one axial side and a lid connected to the main body so as to close the insertion opening, the motor case housing the stator, the rotor, and the sensor board; a resin portion accommodated in the motor case so as to cover at least a portion of the motor; a waterproof member disposed in a wiring passage provided in the lid portion so as to connect an internal space and an external space of the motor case; a signal line connected to the sensor board and fixed by an adhesive inside the waterproof member; Electric work equipment.

16. The waterproof member has a cup portion, The adhesive is filled inside the cup portion. The electric operating machine according to claim 15.

17. a seal member for sealing the boundary between an outer surface of the waterproof member and an inner surface of the wiring passage; The electric operating machine according to claim 15.

18. a motor including a stator including a stator core, an insulator, and a coil, a rotor that rotates about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor; a sensor substrate supporting a magnetic sensor for detecting rotation of the rotor; an output section driven by the rotor shaft; a motor case including a main body having an insertion opening on one axial side and a lid connected to the main body so as to close the insertion opening, the motor case housing the stator and the rotor; a resin portion accommodated in the motor case so as to cover at least a portion of the motor; a waterproof member disposed in a wiring passage provided in the lid portion so as to connect an internal space and an external space of the motor case; A signal line connected to the sensor substrate; a rubber member disposed inside the waterproof member and holding the signal line. Electric work equipment.

19. a motor including a stator including a stator core, an insulator, and a coil, a rotor that rotates about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor; a sensor substrate supporting a magnetic sensor for detecting rotation of the rotor; an output section driven by the rotor shaft; a motor case including a main body having an insertion opening on one axial side and a lid connected to the main body so as to close the insertion opening, the motor case housing the stator and the rotor; a resin portion accommodated in the motor case so as to cover at least a portion of the motor; a waterproof member disposed in a wiring passage provided in the lid portion so as to connect an internal space and an external space of the motor case; A signal line connected to the sensor substrate; a heat shrink tube that seals the boundary between the waterproofing member and the signal line on the outside of the waterproofing member. Electric work equipment.

20. a motor including a stator including a stator core, an insulator, and a coil, a rotor that rotates about a rotation axis relative to the stator, and a rotor shaft fixed to the rotor; a sensor substrate supporting a magnetic sensor for detecting rotation of the rotor; an output section driven by the rotor shaft; a motor case including a main body having an insertion opening on one axial side and a lid connected to the main body so as to close the insertion opening, the motor case housing the stator, the rotor, and the sensor board; a resin portion accommodated in the motor case so as to cover at least a portion of the motor; A signal line held by the holding member and connected to the sensor substrate; a waterproof member that is disposed in a wiring passage provided in the lid portion so as to connect an internal space and an external space of the motor case and supports the holding member, The waterproof member has a snap fit that can be hooked onto at least a portion of the lid. Electric work equipment.

Images