Motor unit and work machine

Abstract

To provide a technique capable of using a highly-versatile compact battery for a motor unit.SOLUTION: A motor unit comprises: a main body housing including a storage section including a first wall, a first battery mounting section disposed on the first wall, and a second battery mounting section disposed on the first wall; and a motor which is disposed inside the storage section and operates a work unit. A first battery which supplies power to the motor is mounted in the first battery mounting section slidably along the first wall. A second battery which supplies power to the motor is mounted in the second battery mounting section slidably along the first wall. The first battery includes a first side face. The second battery includes a second side face which is opposed to the first side face and disposed in parallel with the first side face when the first battery is mounted in the first battery mounting section and the second battery is mounted in the second battery mounting section.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a motor unit and a working machine. [Background technology]

[0002] Patent Document 1 discloses a motor unit. The motor unit is detachably attached to each of a plurality of types of working units and operates the working units. The motor unit includes a storage section having a first wall, a battery attachment section disposed on the first wall, and a motor disposed inside the storage section and operating the working units. A battery that supplies power to the motor is attached to the battery attachment section so as to be slidable along the first wall.

[0003] Patent Document 2 also discloses a motor unit. The motor unit is detachably attached to each of a first working unit and a second working unit, and operates the first working unit and the second working unit. The motor unit includes a motor having a motor shaft, a motor housing supporting the motor, a battery mounting portion to which a battery pack is detachably attached and a main body housing accommodating the motor housing, a first bearing and a second bearing attached to the motor housing and rotatably supporting the motor shaft, a first fan fixed to the motor shaft, and a control unit that operates the motor. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] US Patent Application Publication No. 2021 / 0143710 [Patent Document 2] International Publication No. 2020 / 049617 Summary of the Invention [Problem to be solved by the invention]

[0005] A dedicated large battery is used in the motor unit of the above-mentioned Patent Document 1. It is desirable to use a versatile small battery.

[0006] In the motor unit of Patent Document 2, the first fan is disposed between the first bearing and the second bearing. Therefore, it is necessary to design the distance between the first bearing and the second bearing to be long. This makes the motor unit larger.

[0007] Furthermore, in the motor unit of Patent Document 2, the first fan is disposed in the accommodation space of the motor housing, which increases the size of the motor housing and therefore the size of the motor unit.

[0008] In addition, in the motor unit, a space may be formed between the control unit and the wall of the main housing on which the battery attachment part is arranged, and it is desirable to effectively utilize the space between the control unit and the wall of the main housing on which the battery attachment part is arranged.

[0009] Furthermore, in the motor unit of Patent Document 2, it is desirable to reduce the size of the motor unit by making the magnet smaller.

[0010] The objective of this specification is to provide at least one of a technology that enables the use of a versatile small battery in the motor unit, a technology that prevents the motor unit from becoming too large, and a technology that enables effective utilization of the space between the control unit and the wall of the main housing. [Means for solving the problem]

[0011] This specification discloses a motor unit. The motor unit is detachably attached to each of a plurality of types of working units and operates the working units. The motor unit includes a main housing including a storage section having a first wall, a first battery mounting section arranged on the first wall, and a second battery mounting section arranged on the first wall, and a motor arranged inside the storage section and operating the working units. A first battery that supplies power to the motor is attached to the first battery mounting section so as to be slidable along the first wall. A second battery that supplies power to the motor is attached to the second battery mounting section so as to be slidable along the first wall. The storage section is not arranged between the first battery attached to the first battery mounting section and the second battery attached to the second battery mounting section. The first battery has a first side surface. The second battery has a second side surface that faces the first side surface and is arranged parallel to the first side surface when the first battery is attached to the first battery mounting section and the second battery is attached to the second battery mounting section.

[0012] The first battery and the second battery are small batteries with high versatility. According to the above configuration, the first battery is attached to the first battery attachment portion, and the second battery is attached to the second battery attachment portion. This allows the first battery and the second battery, which are small and highly versatile, to be used in the motor unit. In addition, since the first side surface of the first battery faces the second side surface of the second battery in parallel, the motor unit to which the first battery and the second battery are attached can be made smaller than a configuration in which the first side surface of the first battery faces the second side surface of the second battery in parallel.

[0013] This specification also discloses a motor unit. The motor unit is detachably attached to each of a plurality of types of working units and operates the working units. The motor unit includes a main body housing including a storage section having a first wall, a first battery attachment section arranged on the first wall, and a second battery attachment section arranged on the first wall, and a motor arranged inside the storage section and operates the working units. A first battery that supplies power to the motor is attached to the first battery attachment section. A second battery that supplies power to the motor is attached to the second battery attachment section. The maximum output value of the motor is 1.5 kW or more and 2.35 kW or less.

[0014] The first battery and the second battery are small, versatile batteries. According to the above configuration, the first battery is attached to the first battery attachment portion, and the second battery is attached to the second battery attachment portion. Also, the motor having a maximum output value of 1.5 kW or more and 2.35 kW or less is used to operate a relatively high-output working unit. This makes it possible to operate a relatively high-output working unit by using the small, versatile first battery and the second battery in the motor unit.

[0015] This specification also discloses a motor unit. The motor unit is detachably attached to each of a plurality of types of working units and operates the working units. The motor unit includes a main housing including a storage section having a first wall, a first battery attachment section disposed on the first wall, and a second battery attachment section disposed on the first wall, a motor disposed inside the storage section and operating the working units, and a fixing unit supported by the storage section and including a first fixing section and a second fixing section. A first battery that supplies power to the motor is attached to the first battery attachment section. A second battery that supplies power to the motor is attached to the second battery attachment section. The plurality of types of working units include a first working unit and a second working unit different from the first working unit. The first fixing section is fixed to the first working unit. The second fixing section is fixed to the second working unit.

[0016] The first battery and the second battery are small batteries with high versatility. According to the above configuration, the first battery is attached to the first battery attachment portion, and the second battery is attached to the second battery attachment portion. This allows the first battery and the second battery, which are small and highly versatile, to be used in the motor unit. In addition, the motor unit is fixed to the first working unit via the first fixing portion, and is fixed to the second working unit via the second fixing portion. This allows an increase in the types of working units that can use the motor unit.

[0017] This specification also discloses a working machine. The working machine includes a rammer and a motor unit that is detachably attached to the rammer and operates the rammer. The motor unit includes a main body housing that includes a storage section, a first battery attachment section disposed in the storage section, and a second battery attachment section disposed in the storage section, and a DC motor that is disposed inside the storage section and operates the rammer. A first battery that supplies power to the DC motor is attached to the first battery attachment section. A second battery that supplies power to the DC motor is attached to the second battery attachment section.

[0018] The first battery and the second battery are small batteries with high versatility. According to the above configuration, the first battery is attached to the first battery attachment portion, and the second battery is attached to the second battery attachment portion. This allows the first battery and the second battery, which are small and versatile, to be used in the motor unit to operate the rafter.

[0019] This specification also discloses a motor unit. The motor unit is detachably attached to each of the first working unit and the second working unit, and operates the first working unit and the second working unit. The motor unit includes a motor having a motor shaft and a maximum output value of 1.8 kW or more, a motor housing supporting the motor, a battery mounting portion to which a battery pack is detachably attached, a main body housing accommodating the motor housing, and a first bearing and a second bearing attached to the motor housing and rotatably supporting the motor shaft. The second bearing is disposed rearward of the first bearing. The distance between the front end of the first bearing and the rear end of the second bearing is 115 mm or less.

[0020] According to the above configuration, it is possible to prevent the motor unit from becoming large, compared to a configuration in which the distance between the front end of the first bearing and the rear end of the second bearing exceeds 115 mm.

[0021] This specification also discloses a motor unit. The motor unit is detachably attached to each of the first working unit and the second working unit, and operates the first working unit and the second working unit. The motor unit includes a motor having a motor shaft, a motor housing having an accommodation space for accommodating the motor and having an air hole, a main body housing having a battery mounting part to which a battery pack is detachably attached and accommodating the motor housing, a fan fixed to the motor shaft and disposed only outside the accommodation space, and a fixing unit including a first fixing part fixed to the first working unit and a second fixing part fixed to the second working unit. When the fan rotates, air passes through the space inside the main body housing and outside the motor housing, the air hole, and the accommodation space in that order.

[0022] According to the above configuration, since the fan is disposed outside the accommodation space, it is possible to prevent the motor housing from becoming large in size, and therefore it is possible to prevent the motor unit from becoming large in size.

[0023] This specification also discloses a motor unit. The motor unit is detachably attached to each of the first working unit and the second working unit, and operates the first working unit and the second working unit. The motor unit includes a motor, a motor housing that supports the motor, a control unit that operates the motor, and a battery attachment section to which a battery pack is detachably attached, and includes a main body housing that accommodates the motor housing and the control unit, a motor electric wire extending from the motor, and a motor connection electric wire extending from the control unit and connected to the motor electric wire. The battery attachment section is disposed on a first wall of the main body housing. A terminal that connects the motor electric wire and the motor connection electric wire is disposed in a space between the first wall and the control unit.

[0024] According to the above configuration, the terminals for connecting the motor wires and the motor connection wires are arranged in the space between the first wall and the battery mounting portion, thereby making it possible to effectively utilize the space between the first wall and the control unit.

[0025] This specification also discloses a motor unit. The motor unit is detachably attached to each of the first working unit and the second working unit, and operates the first working unit and the second working unit. The motor unit includes a motor, a motor housing supporting the motor, a battery mounting section to which a battery pack is detachably attached, a main housing accommodating the motor housing, and a fixing unit including a first fixing section fixed to the first working unit and a second fixing section fixed to the second working unit. The motor includes a stator body, a coil wound around the stator body, a rotor body, and a plurality of magnets fixed to the rotor body. The residual magnetic flux density Br of the magnet is 1.32 T or more. The coercive force bHc of the magnet is 971 kA / m or more.

[0026] According to the above configuration, the magnet can be made smaller than in a configuration in which the residual magnetic flux density of the magnet is less than 1.32 T and / or the coercive force of the magnet is less than 971 kA / m, which allows the motor unit to be made smaller. [Brief description of the drawings]

[0027] [Figure 1] 1 illustrates a system 1 according to a first embodiment. [Diagram 2] FIG. 2 is a perspective view of the motor unit 10 and the rammer 4a according to the first embodiment. [Diagram 3] FIG. 2 is a perspective view of the motor unit 10 and the plate compactor 4b according to the first embodiment. [Figure 4] FIG. 2 is a perspective view of a motor unit 10 and a battery pack BP according to the first embodiment. [Diagram 5] 4 is a table showing specifications of the motor unit 10, the main body housing 12, the motor 86, and the battery pack BP of the first embodiment. [Figure 6] FIG. 2 is a perspective view of a motor unit 10 and a battery pack BP according to the first embodiment. [Figure 7] 1 is a perspective view of the vicinity of a first battery attachment portion 22 and a second battery attachment portion 24 in a motor unit 10 of a first embodiment. [Figure 8] 2 is a cross-sectional view of the vicinity of a first battery pack BP1 and a second battery pack BP2 in a motor unit 10 of the first embodiment. [Figure 9] 4 is a table showing the specifications of a motor 86 and a battery pack BP in the first embodiment. [Figure 10] FIG. 2 is a perspective view of a battery pack BP according to the first embodiment. [Figure 11] 2 is a cross-sectional view of the vicinity of a first battery attachment portion 22 and a first battery pack BP1 in the motor unit 10 of the first embodiment. FIG. [Figure 12] FIG. 2 is an exploded perspective view of the motor unit 10 of the first embodiment. [Figure 13] 1 is a cross-sectional view of a motor unit 10 and a battery pack BP according to a first embodiment. [Figure 14] FIG. 2 is a perspective view of a motor housing 84 and a motor 86 according to the first embodiment. [Figure 15] 2 is a cross-sectional view of the vicinity of an intake port 28a in the motor unit 10 of the first embodiment. [Figure 16] 2 is a cross-sectional view of a motor housing 84, a motor 86, and a fan 88 according to the first embodiment. [Figure 17] 2 is an exploded perspective view of a motor housing 84, a motor 86, and a plate member 92 according to the first embodiment. FIG. [Figure 18] FIG. 1 is an exploded perspective view of a motor unit 10 according to a first embodiment with a main body housing 12 and a support unit 100 removed. [Figure 19] FIG. 1 is an exploded perspective view of a motor unit 10 according to a first embodiment with a main body housing 12 and a support unit 100 removed. [Figure 20] FIG. 2 is a right side view of the motor unit 10 of the first embodiment with the main body housing 12 and the support unit 100 removed. [Figure 21] FIG. 2 is a left side view of the motor unit 10 of the first embodiment with the main body housing 12 and the support unit 100 removed. [Figure 22] 1 is a cross-sectional view of a motor unit 10 according to a first embodiment. [Figure 23] FIG. 1 is a front view of a motor unit 10 according to a first embodiment with a main body housing 12 removed. [Figure 24] 1 is an exploded perspective view of a motor unit 10 according to a first embodiment with a main body housing 12 removed. FIG. [Diagram 25] 1 is an exploded perspective view of a motor unit 10 according to a first embodiment with a main body housing 12 removed. FIG. [Figure 26] 2 is a cross-sectional view of the vicinity of a control unit 102 in the motor unit 10 of the first embodiment. [Figure 27] FIG. 2 is a left side view of the motor unit 10 and the rammer 4a according to the first embodiment. [Figure 28]FIG. 2 is a front view of the motor housing 84, the motor 86, and the fixed unit 90 of the first embodiment. [Figure 29] 1 is a perspective view of the vicinity of a fixed base 308 of the rammer 4a of the first embodiment. FIG. [Diagram 30] FIG. 2 is an exploded perspective view of the motor unit 10 and the rammer 4a according to the first embodiment. [Diagram 31] FIG. 2 is a left side view of the motor unit 10 and the plate compactor 4b according to the first embodiment. [Diagram 32] FIG. 11 is an exploded perspective view of a first fixing portion 148 and a plate compactor 4b according to the first embodiment. [Diagram 33] FIG. 2 is a side view of the motor unit 10 and the slope grass mower 4c of the first embodiment. [Diagram 34] FIG. 11 is a perspective view of a motor unit 10 and a battery pack BP according to a second embodiment. [Diagram 35] FIG. 11 is a perspective view of a motor unit 10 and a battery pack BP according to a third embodiment. [Diagram 36] FIG. 11 is a right side view of the motor unit 10 according to the fourth embodiment with the main housing 12 and the support unit 100 removed. [Figure 37] FIG. 11 is a right side view of the motor unit 10 according to the fifth embodiment with the main body housing 12 and the support unit 100 removed. [Figure 38] FIG. 13 is a perspective view of a power tool 6 according to a sixth embodiment. [Figure 39] FIG. 13 is a right cross-sectional view of a motor housing 84, a motor 86, and a fan 88 according to a sixth embodiment. [Diagram 40] FIG. 13 is a right cross-sectional view of a motor housing 84, a motor 86, and a fan 88 according to a sixth embodiment. [Diagram 41] FIG. 13 is a rear cross-sectional view of a motor housing 84 and a motor 86 according to a sixth embodiment. [Diagram 42] 13 is a right cross-sectional view of the vicinity of a sensor board 520 in a motor housing 84 and a motor 86 according to a sixth embodiment. FIG. [Diagram 43]13 is a rear cross-sectional view of the vicinity of a main power switch 74, a display panel 76, and a rotation speed change switch 78b in the motor unit 10 of the sixth embodiment. FIG. [Diagram 44] 13 is a right side view of the control unit 102, a first switch signal line 530, a first switch connecting signal line 532, a first switch connecting terminal 534, a second switch electric wire 536, a second switch connecting electric wire 538, and a second switch connecting terminal 540 of the sixth embodiment. [Diagram 45] FIG. 13 is a perspective view of a motor unit 10 according to a sixth embodiment with the left main body housing 16 removed. [Diagram 46] 13 is a perspective view of the vicinity of a terminal accommodating space 544 of a motor unit 10 according to a sixth embodiment. FIG. [Figure 47] FIG. 13 is a schematic diagram of a motor unit 10 according to a sixth embodiment. [Figure 48] 13 is an oblique view of the motor housing 84, control unit 102, cylindrical vibration-proof member 104, motor power line 560, motor connecting power line 562, first motor connecting terminal 564, motor signal line 566, motor connecting signal line 568, and second motor connecting terminal 570 of the sixth embodiment. [Figure 49] FIG. 13 is a perspective view of the motor unit 10 of the sixth embodiment with the right main body housing 14 removed. [Figure 50] 13 is a perspective view of the motor unit 10 of the sixth embodiment with the right main body housing 14, the plate member 92, the right cover member 96, and the support unit 100 removed. FIG. [Figure 51] FIG. 13 is a right side view of the motor unit 10 of the sixth embodiment with the right main body housing 14 removed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Representative and non-limiting examples of the present invention will be described in detail below with reference to the drawings. This detailed description is intended simply to provide those skilled in the art with details for implementing the preferred examples of the present invention, and is not intended to limit the scope of the present invention. In addition, the additional features and inventions disclosed can be used separately or together with other features and inventions to provide further improved motor units and working machines, and methods of manufacturing and using the same.

[0029] In addition, the combinations of features and steps disclosed in the following detailed description are not essential for implementing the present invention in the broadest sense, but are specifically described only to illustrate representative embodiments of the present invention. Furthermore, the various features of the following representative embodiments and the various features described in the claims do not have to be combined in the exact manner of the embodiments described herein or in the order listed in order to provide additional and useful embodiments of the present invention.

[0030] All features described in the specification and / or claims are intended to be disclosed individually and independently of one another as limitations to the specific features described in the original disclosure and claims, apart from the configuration of features described in the examples and / or claims. Furthermore, all numerical ranges and group or aggregate descriptions are intended to disclose intermediate configurations thereof as limitations to the specific features described in the original disclosure and claims.

[0031] This specification discloses a motor unit. The motor unit is detachably attached to each of a plurality of types of working units and operates the working units. The motor unit includes a main housing including a storage section having a first wall, a first battery mounting section arranged on the first wall, and a second battery mounting section arranged on the first wall, and a motor arranged inside the storage section and operating the working units. A first battery that supplies power to the motor is attached to the first battery mounting section so as to be slidable along the first wall. A second battery that supplies power to the motor is attached to the second battery mounting section so as to be slidable along the first wall. The storage section is not arranged between the first battery attached to the first battery mounting section and the second battery attached to the second battery mounting section. The first battery has a first side surface. The second battery has a second side surface that faces the first side surface and is arranged parallel to the first side surface when the first battery is attached to the first battery mounting section and the second battery is attached to the second battery mounting section.

[0032] In one or more embodiments, the motor unit may not include a wall portion disposed between a first side of the first battery and a second side of the second battery when the first battery is mounted to the first battery mounting portion and the second battery is mounted to the second battery mounting portion.

[0033] According to the above configuration, the motor unit to which the first battery and the second battery are attached can be made more compact.

[0034] In one or more embodiments, when the motor unit is placed on a mounting surface, the first wall may be located above the motor.

[0035] The motor is a heavy component. The weight of the motor is greater than the weight of the first battery and the weight of the second battery. According to the above configuration, the heavy motor can be disposed closer to the placement surface than the first battery and the second battery.

[0036] In one or more embodiments, the first wall may include a first surface on which the first battery mounting portion and the second battery mounting portion are disposed.

[0037] According to the above configuration, the first battery can be easily attached to the first battery attachment portion, and the second battery can be easily attached to the second battery attachment portion.

[0038] In one or more embodiments, the motor unit may further include an elastically deformable vibration isolating member disposed between the motor and the main body housing.

[0039] According to the above configuration, it is possible to suppress the transmission of vibration from the motor to the main body housing, thereby suppressing the transmission of vibration to the first battery and the second battery.

[0040] In one or more embodiments, the motor unit may further include a motor housing that houses the motor, and a plate member fixed to the motor housing. The vibration isolating member may be fixed to the plate member and the main housing.

[0041] In a configuration in which the vibration-proof member is directly fixed to the motor housing, the configuration of the motor housing becomes complicated. With the above configuration, it is possible to prevent the configuration of the motor housing from becoming complicated.

[0042] In one or more embodiments, the motor unit may further include a control unit disposed inside the housing for controlling the motor, and a support unit for supporting the control unit and fixed to the plate member via a vibration-isolating member.

[0043] According to the above configuration, it is possible to suppress the transmission of vibrations to the control unit.

[0044] In one or more embodiments, each of the first battery and the second battery may include a hook that is operated by a user, and the main body housing may include an engagement portion that engages with the hook.

[0045] According to the above configuration, the first battery and the second battery engage with the engaged portion of the main body housing, thereby making it possible to prevent the first battery and the second battery from coming off the main body housing.

[0046] In one or more embodiments, when the motor unit is viewed in a direction perpendicular to the first wall, the first battery mounting portion may not overlap the second battery mounting portion.

[0047] According to the above configuration, when the motor unit is viewed in a direction perpendicular to the first wall, the structure of the first wall can be prevented from becoming complicated, compared to a configuration in which the first battery mounting portion overlaps with the second battery mounting portion.

[0048] In one or more embodiments, a first battery may be attached to the first battery mounting portion so as to be slidable in a first direction along the first wall. A second battery may be attached to the second battery mounting portion so as to be slidable in the first direction. The motor may include a motor shaft extending in the first direction and fixed to the working unit.

[0049] According to the above configuration, the direction in which the first battery and the direction in which the second battery are slid can be easily grasped based on the attitude of the motor shaft.

[0050] In one or more embodiments, the motor unit may further include a control unit disposed within the housing and configured to control the motor, the control unit at least partially overlapping the motor when the motor unit is viewed in the first direction.

[0051] According to the above configuration, when the motor unit is viewed in the first direction, the motor unit can be prevented from becoming larger in a direction perpendicular to the first direction, compared to a configuration in which the control unit does not at least partially overlap with the motor.

[0052] In one or more embodiments, the motor unit may further include a fixing portion fixed to the working unit, and the motor may be disposed between the fixing portion and the first battery mounting portion and between the fixing portion and the second battery mounting portion.

[0053] According to the above configuration, it is possible to prevent the first battery and the second battery from interfering with the working unit.

[0054] This specification discloses a motor unit. The motor unit is detachably attached to each of a plurality of types of working units and operates the working units. The motor unit includes a main body housing including a storage section having a first wall, a first battery mounting section arranged on the first wall, and a second battery mounting section arranged on the first wall, and a motor arranged inside the storage section and operates the working units. A first battery that supplies power to the motor is attached to the first battery mounting section. A second battery that supplies power to the motor is attached to the second battery mounting section. The maximum output value of the motor is 1.5 kW or more and 2.35 kW or less.

[0055] In one or more embodiments, the torque of the motor may be 2.0 N·m or more and 11.0 N·m or less. The rotation speed of the motor may be 3000 rpm or more and 4300 rpm or less.

[0056] A motor with a torque of 2.0 N·m or more and 11.0 N·m or less and a rotation speed of 3000 rpm or more and 4300 rpm or less is used to operate a relatively high-output working unit. This makes it possible to operate a relatively high-output working unit by using the versatile small first and second batteries for the motor unit.

[0057] In one or more embodiments, the volume of the body housing is 9500 cm 3 It may be the following.

[0058] Generally, the higher the maximum output value of a motor, the larger the motor becomes. Accordingly, the main body housing also becomes larger. With the above configuration, the main body housing can be made smaller in a motor unit that operates a relatively high-output working unit. This allows the motor unit to be made smaller.

[0059] In one or more embodiments, the volume of the first battery and the volume of the second battery each are greater than or equal to 1500 cm 3 It may be the following.

[0060] According to the above configuration, the motor unit can be made smaller.

[0061] In one or more embodiments, when the motor unit is placed on a mounting surface, the first wall may be located above the motor.

[0062] The motor is a heavy component. The weight of the motor is greater than the weight of the first battery and the weight of the second battery. According to the above configuration, the heavy motor can be disposed closer to the placement surface than the first battery and the second battery.

[0063] In one or more embodiments, a first battery may be attached to the first battery mounting portion so as to be slidable in a first direction along the first wall. A second battery may be attached to the second battery mounting portion so as to be slidable in the first direction. The motor may include a motor shaft extending in the first direction and fixed to the working unit.

[0064] According to the above configuration, the direction in which the first battery and the direction in which the second battery are slid can be easily grasped based on the attitude of the motor shaft.

[0065] In one or more embodiments, the motor unit may further include a fixing portion fixed to the working unit, and the motor may be disposed between the fixing portion and the first battery mounting portion and between the fixing portion and the second battery mounting portion.

[0066] According to the above configuration, it is possible to prevent the first battery and the second battery from interfering with the working unit.

[0067] In one or more embodiments, the first battery mounted on the first battery mounting portion and the second battery mounted on the second battery mounting portion may be electrically connected in series.

[0068] According to the above configuration, the output of the motor unit can be increased, compared to a configuration in which the first battery and the second battery are electrically connected in parallel.

[0069] This specification discloses a motor unit. The motor unit is detachably attached to each of a plurality of types of working units and operates the working units. The motor unit includes a main housing including a storage section having a first wall, a first battery mounting section arranged on the first wall, and a second battery mounting section arranged on the first wall, a motor arranged inside the storage section and operating the working unit, and a fixing unit supported by the storage section and including a first fixing section and a second fixing section. A first battery that supplies power to the motor is attached to the first battery mounting section. A second battery that supplies power to the motor is attached to the second battery mounting section. The plurality of types of working units include a first working unit and a second working unit different from the first working unit. The first fixing section is fixed to the first working unit. The second fixing section is fixed to the second working unit.

[0070] In one or more embodiments, when the motor unit is placed on a mounting surface, the first fixing part may be placed on the mounting surface. The motor may be disposed between the first fixing part and the first battery mounting part and between the first fixing part and the second battery mounting part.

[0071] According to the above configuration, it is possible to prevent the first battery and the second battery from interfering with the first working unit.

[0072] In one or more embodiments, the motor unit may further include a motor housing that houses the motor. The second fixing portion may be formed in the motor housing.

[0073] According to the above configuration, the number of parts of the motor unit can be reduced compared to a configuration in which the second fixed portion is not formed on the motor housing.

[0074] In one or more embodiments, the first fixing portion may include a first fixing surface fixed to the first working unit. The second fixing portion may include a second fixing surface fixed to the second working unit. The second fixing surface may be substantially perpendicular to the first fixing surface.

[0075] According to the above configuration, the first fixed portion or the second fixed portion is selected depending on the shape of the working unit, etc. This makes it possible to increase the types of working units that can use the motor unit.

[0076] In one or more embodiments, the motor unit may further include a fan disposed inside the housing and rotated by operation of the motor. A first air hole may be formed between the housing and the second fixing part. A second air hole may be formed in the second fixing part. When the fan rotates, air may flow into the housing from one of the first air hole and the second air hole and flow out of the housing from the other of the first air hole and the second air hole.

[0077] According to the above configuration, the motor disposed inside the housing can be cooled.

[0078] In one or more embodiments, the rated capacity of the first battery may be different from the rated capacity of the second battery.

[0079] According to the above configuration, a plurality of types of batteries can be used in the motor unit.

[0080] This specification also discloses a motor unit. The motor unit is detachably attached to each of the first working unit and the second working unit, and operates the first working unit and the second working unit. The motor unit includes a motor having a motor shaft and a maximum output value of 1.8 kW or more, a motor housing supporting the motor, a battery mounting portion to which a battery pack is detachably attached, a main body housing accommodating the motor housing, and a first bearing and a second bearing attached to the motor housing and rotatably supporting the motor shaft. The second bearing is disposed rearward of the first bearing. The distance between the front end of the first bearing and the rear end of the second bearing is 115 mm or less.

[0081] In one or more embodiments, the first bearing and the second bearing may be disposed within the motor housing.

[0082] According to the above configuration, it is possible to prevent the user from touching the first bearing and the second bearing.

[0083] In one or more embodiments, the motor housing may include a first member to which the first bearing is attached, and a second member to which the second bearing is attached, the second member defining an accommodation space for accommodating the motor between the first member and the second member.

[0084] According to the above configuration, the configuration of the motor housing can be prevented from becoming complicated, compared to a configuration in which the first bearing and the second bearing are attached to the same member.

[0085] In one or more embodiments, the motor unit may further include a fan fixed to the motor shaft and disposed only outside the accommodation space. The motor housing may have an air hole. Air may flow into the accommodation space through the air hole by rotation of the fan.

[0086] According to the above configuration, the motor housing can be prevented from becoming large in size, compared to a configuration in which the fan is disposed in the accommodation space.

[0087] In one or more embodiments, the motor unit may further include a control unit for operating the motor. Air may flow from the control unit towards the air vents by rotation of the fan.

[0088] According to the above configuration, the air passes through the control unit and the air hole, and then passes through the motor, so that a single air flow can cool both the control unit and the motor.

[0089] In one or more embodiments, when the motor unit is viewed in the direction along which the motor shaft extends, the control unit may at least partially overlap the motor.

[0090] According to the above configuration, when the motor unit is viewed in the direction in which the motor shaft extends, the motor unit is prevented from becoming larger in the direction perpendicular to the direction in which the motor shaft extends, compared to a configuration in which the control unit does not overlap with the motor.

[0091] In one or more embodiments, the motor unit may further include a sensor board disposed in the housing space and configured to detect rotation of the motor. The motor shaft may include a fixed portion that is fixed to each of the first working unit and the second working unit. The first bearing may be disposed between the fixed portion and the second bearing. The sensor board may be fixed to the second member.

[0092] According to the above configuration, the sensor board can be separated from the first working unit and the second working unit, compared to a configuration in which the sensor board is fixed to the first member.

[0093] In one or more embodiments, the motor unit may further include a fixing unit including a first fixing portion fixed to the first working unit and a second fixing portion fixed to the second working unit. When the motor unit is placed on the mounting surface, the first fixing portion may be placed on the mounting surface. The motor shaft may include fixing portions fixed to each of the first working unit and the second working unit. The fixing portion of the motor shaft is approximately parallel to the first fixing portion.

[0094] According to the above configuration, when the first fixed portion is fixed to the first working unit, it is possible to easily fix the fixed portion of the motor shaft to the first working unit.

[0095] In one or more embodiments, the motor unit may further include a fixing unit including a first fixing portion fixed to the first working unit and a second fixing portion fixed to the second working unit. When the motor unit is placed on a mounting surface, the first fixing portion may be placed on the mounting surface. When the battery pack is attached to the battery attachment portion, the battery pack may be disposed substantially parallel to the first fixing portion and above the motor.

[0096] The motor is a heavy component. The weight of the motor is greater than the weight of the battery pack. With the above configuration, the heavy motor is disposed closer to the mounting surface than the battery pack. This allows the center of gravity of the motor unit to be closer to the mounting surface.

[0097] In one or more embodiments, the battery pack may be usable with a power tool.

[0098] According to the above configuration, the motor unit can be operated using a highly versatile battery pack.

[0099] In one or more embodiments, the motor unit may further include a switch for receiving a user's operation to control the motor. The switch may be disposed on the main body housing.

[0100] According to the above configuration, the configuration of the motor unit can be prevented from becoming complicated, compared to a configuration in which the switch is disposed in a component other than the main body housing.

[0101] In one or more embodiments, the motor unit may further include a control unit that operates the motor, a switch wire extending from the switch, and a switch connecting wire extending from the control unit and connected to the switch wire. The battery attachment portion may be disposed on a first wall of the main body housing. A terminal that connects the switch wire and the switch connecting wire may be disposed in a space between the first wall and the control unit.

[0102] According to the above configuration, the terminal for connecting the switch wire and the switch connecting wire is disposed in the space between the first wall and the control unit, thereby making it possible to effectively utilize the space between the first wall and the control unit.

[0103] In one or more embodiments, the motor unit may further include a motor electric wire extending from the motor and a motor connecting electric wire extending from the control unit and connected to the motor electric wire. A terminal for connecting the motor electric wire and the motor connecting electric wire may be disposed in the space between the first wall and the control unit.

[0104] According to the above configuration, the terminals for connecting the motor electric wires and the motor connecting electric wires are disposed in the space between the first wall and the control unit, thereby making it possible to effectively utilize the space between the first wall and the control unit.

[0105] In one or more embodiments, a motor may include a stator body, a coil wound around the stator body, a rotor body, and a plurality of magnets fixed to the rotor body. The residual magnetic flux density of the magnets may be 1.32 T or greater. The coercivity of the magnets may be 971 kA / m or greater.

[0106] According to the above configuration, the magnet can be made smaller than in a configuration in which the residual magnetic flux density of the magnet is less than 1.32 T and / or the coercive force of the magnet is less than 971 kA / m, which allows the motor unit to be made smaller.

[0107] In one or more embodiments, the magnet may be a neodymium magnet.

[0108] According to the above configuration, since the magnetic force of a neodymium magnet is the strongest among all permanent magnets, the magnet can be made smaller, which allows the motor unit to be made more compact.

[0109] In one or more embodiments, the stator body may include a plurality of teeth, and the number of the plurality of magnets may be equal to or greater than the number of the plurality of teeth.

[0110] According to the above configuration, it is possible to suppress the occurrence of cogging during operation of the motor.

[0111] In one or more embodiments, the motor unit may further include a control unit that operates the motor, and a vibration-damping member that is elastically deformable and suppresses the transmission of motor vibrations from the motor to the battery mounting portion and from the motor to the control unit.

[0112] According to the above configuration, even if the motor vibrates due to its operation, the battery pack and the control unit can be prevented from vibrating.

[0113] This specification also discloses a motor unit. The motor unit is detachably attached to each of the first working unit and the second working unit, and operates the first working unit and the second working unit. The motor unit includes a motor having a motor shaft, a motor housing having an accommodation space for accommodating the motor and having an air hole, a main body housing having a battery mounting part to which a battery pack is detachably attached and accommodating the motor housing, a fan fixed to the motor shaft and disposed only outside the accommodation space, and a fixing unit including a first fixing part fixed to the first working unit and a second fixing part fixed to the second working unit. When the fan rotates, air passes through the space inside the main body housing and outside the motor housing, the air hole, and the accommodation space in that order.

[0114] In one or more embodiments, the motor unit may further include a control unit for operating the motor. Air may flow from the control unit towards the air vents by rotation of the fan.

[0115] According to the above configuration, the air passes through the control unit and the air hole, and then passes through the motor, so that a single air flow can cool both the control unit and the motor.

[0116] In one or more embodiments, when the motor unit is viewed in the direction along which the motor shaft extends, the control unit may at least partially overlap the motor.

[0117] According to the above configuration, when the motor unit is viewed in the direction in which the motor shaft extends, the motor unit is prevented from becoming larger in the direction perpendicular to the direction in which the motor shaft extends, compared to a configuration in which the control unit does not overlap with the motor.

[0118] This specification also discloses a motor unit. The motor unit is detachably attached to each of the first working unit and the second working unit, and operates the first working unit and the second working unit. The motor unit includes a motor, a motor housing that supports the motor, a control unit that operates the motor, and a battery attachment section to which a battery pack is detachably attached, and includes a main body housing that accommodates the motor housing and the control unit, a motor electric wire extending from the motor, and a motor connection electric wire extending from the control unit and connected to the motor electric wire. The battery attachment section is disposed on a first wall of the main body housing. A terminal that connects the motor electric wire and the motor connection electric wire is disposed in a space between the first wall and the control unit.

[0119] In one or more embodiments, the motor unit may further include a switch for receiving a user's operation to control the motor, a switch wire extending from the switch, and a switch connecting wire extending from the control unit and connected to the switch wire. A terminal for connecting the switch wire and the switch connecting wire may be disposed in the space between the first wall and the control unit.

[0120] According to the above configuration, the terminal for connecting the switch wire and the switch connecting wire is disposed in the space between the first wall and the control unit, thereby making it possible to effectively utilize the space between the first wall and the control unit.

[0121] This specification also discloses a motor unit. The motor unit is detachably attached to each of the first working unit and the second working unit, and operates the first working unit and the second working unit. The motor unit includes a motor, a motor housing supporting the motor, a battery mounting section to which a battery pack is detachably attached, a main housing accommodating the motor housing, and a fixing unit including a first fixing section fixed to the first working unit and a second fixing section fixed to the second working unit. The motor includes a stator body, a coil wound around the stator body, a rotor body, and a plurality of magnets fixed to the rotor body. The residual magnetic flux density Br of the magnet is 1.32 T or more. The coercive force bHc of the magnet is 971 kA / m or more.

[0122] In one or more embodiments, the magnet may be a neodymium magnet.

[0123] According to the above configuration, since the magnetic force of a neodymium magnet is the strongest among all permanent magnets, the magnet can be made smaller, which allows the motor unit to be made more compact.

[0124] In one or more embodiments, the stator body may include a plurality of teeth, and the number of the plurality of magnets may be equal to or greater than the number of the plurality of teeth.

[0125] According to the above configuration, it is possible to suppress the occurrence of cogging during operation of the motor.

[0126] (First embodiment) As shown in FIG. 1, the system 1 includes a plurality of types of working units 4 and a motor unit 10. The motor unit 10 is a general-purpose motor unit. The motor unit 10 is detachably attached to each of the plurality of types of working units 4. Instead of the motor unit 10, an engine unit can be detachably attached to the working unit 4. The engine unit is a compatible engine unit, for example, the engine unit of GX120 sold by Honda R&D Co., Ltd. That is, the working unit 4 is applicable to both the motor unit 10 and the engine unit. The plurality of types of working units 4 include, for example, a rammer 4a, a plate compactor 4b, a slope grass mower 4c, a trowel 4d, a concrete saw 4e, a reel-type lawn mower 4f, an edger 4g, a detacher 4h, a stump grinder 4i, a compressor 4j, a high-pressure washer 4k, a paint sprayer 4l, a trash pump 4m, and a chemical sprayer 4n. Furthermore, the working unit 4 is not limited to the above working unit 4, and may be a working unit 4 other than the above working unit 4. For example, as shown in FIG. 2, the motor unit 10 is detachably attached to the rammer 4a. Also, as shown in FIG. 3, the motor unit 10 is detachably attached to the plate compactor 4b. Hereinafter, the configuration in which the motor unit 10 is attached to the working unit 4 may be referred to as the working machine 2. A user uses the working machine 2 to perform work.

[0127] As shown in FIG. 4, the motor unit 10 operates with the power of a plurality of (two in this embodiment) battery packs BP. Hereinafter, one of the battery packs BP may be referred to as a first battery pack BP1, and the other battery pack BP may be referred to as a second battery pack BP2. The direction in which the motor shaft 140 of the motor 86 (see FIG. 16), which will be described later, extends is referred to as the front-rear direction, the direction perpendicular to the front-rear direction is referred to as the left-right direction, and the direction perpendicular to the front-rear direction and the left-right direction is referred to as the up-down direction. The front-rear direction, the left-right direction, and the up-down direction are defined to explain the detailed configuration of the motor unit 10. In the working machine 2 in which the motor unit 10 and the working unit 4 are combined, the front-rear direction, the left-right direction, and the up-down direction of the working machine 2 may differ from the front-rear direction, the left-right direction, and the up-down direction of the motor unit 10.

[0128] As shown in FIG. 5, in a motor unit 10 including a plurality of battery packs BP, the weight of the motor unit 10 is 11.7 kg or more and 19 kg or less. The length in the front-rear direction of the motor unit 10 is 230 mm or more and 235 mm or less. Note that the length in the front-rear direction does not include the length of the motor shaft 140 exposed to the outside of the motor unit 10. The length in the left-right direction of the motor unit 10 is 170 mm or more and 230 mm or less. The length in the up-down direction of the motor unit 10 is 280 mm or more and 350 mm or less. The volume of the motor unit 10 is 9500 cm 3 Above 13,000 cm 3 The following is the result.

[0129] In a motor unit 10 that does not include multiple battery packs BP, the weight of the motor unit 10 is 10.5 kg or more and 15 kg or less. The length in the front-rear direction of the motor unit 10 is 230 mm or more and 235 mm or less. Note that the length in the front-rear direction does not include the length of the motor shaft 140 exposed to the outside of the motor unit 10. The length in the left-right direction of the motor unit 10 is 170 mm or more and 230 mm or less. The length in the up-down direction of the motor unit 10 is 240 mm or more and 260 mm or less. The volume of the motor unit 10 is 8500 cm 3 More than 10000cm3 The following is the result.

[0130] As shown in Figs. 4 and 6, the motor unit 10 includes a main body housing 12. The main body housing 12 is made of, for example, a resin material. As shown in Fig. 5, the weight of the main body housing 12 is 0.9 kg or more and 1.2 kg or less. The length of the main body housing 12 in the front-rear direction is 220 mm or more and 225 mm or less. The length of the main body housing 12 in the left-right direction is 170 mm or more and 230 mm or less. The length of the main body housing 12 in the up-down direction is 220 mm or more and 240 mm or less. The volume of the main body housing 12 is 8000 cm 3 Above 9500cm 3 The following is the result.

[0131] As shown in Figs. 4 and 6, the main body housing 12 includes a right main body housing 14 and a left main body housing 16. The right main body housing 14 defines the outer shape of the right half of the main body housing 12. The left main body housing 16 defines the outer shape of the left half of the main body housing 12. The right main body housing 14 and the left main body housing 16 are fixed with screws 17 (see Fig. 12). Each of the right main body housing 14 and the left main body housing 16 has a shape obtained by dividing the main body housing 12 in half on a plane including the front-rear direction and the up-down direction. The boundary between the right main body housing 14 and the left main body housing 16 is located at the center of the main body housing 12 in the left-right direction. An accommodation space 18 (see Fig. 13) is defined between the right main body housing 14 and the left main body housing 16.

[0132] The main body housing 12 includes a storage section 20, a first battery attachment section 22, and a second battery attachment section 24. The storage section 20 has an interior storage space 18 (see FIG. 13). The storage section 20 has a first opening 26 and a second opening 28. The first opening 26 is disposed in a front wall 20a of the storage section 20. The first opening 26 has a substantially circular cross-sectional shape. The first opening 26 communicates the storage space 18 with the outside of the main body housing 12. As shown in FIG. 6, the second opening 28 is disposed in a bottom wall 20b of the storage section 20. The second opening 28 has a substantially rectangular cross-sectional shape. The second opening 28 communicates the storage space 18 with the outside of the main body housing 12.

[0133] As shown in Fig. 7, the upper wall 20c of the storage section 20 includes a base 32, a first truncated pyramid section 34, and a second truncated pyramid section 36. The first truncated pyramid section 34 protrudes upward from the base 32. The first truncated pyramid section 34 has a quadrangular pyramid shape. An upper surface 34a of the first truncated pyramid section 34 is disposed above an upper surface 32a of the base 32. The upper surfaces 32a and 34a are each perpendicular to the up-down direction.

[0134] The second truncated pyramid portion protrudes upward from the base portion 32. The second truncated pyramid portion is connected to the rear end of the first truncated pyramid portion .

[0135] The first battery mounting portion 22 and the second battery mounting portion 24 are disposed on the upper surface 34a of the first truncated pyramid portion 34. The first battery mounting portion 22 and the second battery mounting portion 24 are disposed side by side in the left-right direction. When the motor unit 10 is viewed in the up-down direction, the first battery mounting portion 22 does not overlap with the second battery mounting portion 24.

[0136] The first battery mounting section 22 includes a first right rail section 40, a first left rail section 42, and a first connection section 44. The first right rail section 40 and the first left rail section 42 extend in the front-rear direction. The first right rail section 40 extends upward from the upper surface 34a of the first truncated pyramid section 34, then bends and extends to the left. The first left rail section 42 extends upward from the upper surface 34a of the first truncated pyramid section 34, then bends and extends to the right. The first left rail section 42 faces the first right rail section 40 in the left-right direction. The first connection section 44 connects the front end of the first right rail section 40 to the front end of the first left rail section 42.

[0137] The second battery mounting section 24 includes a second right rail section 48, a second left rail section 50, and a second connection section 52. The second right rail section 48 and the second left rail section 50 extend in the front-rear direction. The second right rail section 48 extends upward from the upper surface 34a of the first truncated pyramid section 34, then bends and extends leftward. The second left rail section 50 is integrally formed with the first right rail section 40. The second left rail section 50 extends upward from the upper surface 34a of the first truncated pyramid section 34, then bends and extends rightward. The second left rail section 50 faces the second right rail section 48 in the left-right direction. The second connection section 52 connects the front end of the second right rail section 48 to the front end of the second left rail section 50.

[0138] 8, a first battery pack BP1 is attached to the first battery attachment portion 22. A second battery pack BP2 is attached to the second battery attachment portion 24. In this embodiment, the configuration of the first battery pack BP1 is the same as the configuration of the second battery pack BP2. Therefore, the following description will be given taking the first battery pack BP1 as an example.

[0139] The first battery pack BP1 includes a chargeable and dischargeable secondary battery, for example, a lithium-ion battery. As shown in FIG. 5, the weight of the first battery pack BP1 is 0.6 kg or more and 2 kg or less. The length of the first battery pack BP1 in the front-rear direction is 115 mm or more and 155 mm or less. The length of the first battery pack BP1 in the left-right direction is 75 mm or more and 85 mm or less. The length of the first battery pack BP1 in the up-down direction is 65 mm or more and 115 mm or less. The volume of the first battery pack BP1 is 500 cm 3 Above 1500cm 3 9, the maximum voltage value of the first battery pack BP1 is 40 V or more and 80 V or less. The rated capacity of the first battery pack BP1 is 4 Ah or more and 40 Ah or less. In a modified example, the configuration of the first battery pack BP1 (i.e., dimensions, maximum voltage value, and rated capacity) may be different from the configuration of the second battery pack BP2 (i.e., dimensions, maximum voltage value, and rated capacity).

[0140] 10, the first battery pack BP1 includes a battery housing 56, a hook 58, a right battery rail 60, and a left battery rail 62. The battery housing 56 accommodates therein cells of a chargeable and dischargeable secondary battery, for example, a lithium ion battery cell.

[0141] The hook 58 is movably attached to the lower surface 56a of the battery housing 56. The hook 58 includes an engagement portion 64 and an operation portion 66. The engagement portion 64 is, for example, an engagement claw. The engagement portion 64 normally protrudes to the outside of the battery housing 56. When the operation portion 66 is pushed into the battery housing 56, the entire engagement portion 64 moves into the inside of the battery housing 56.

[0142] The right battery rail 60 and the left battery rail 62 protrude from the lower surface 56a of the battery housing 56. The right battery rail 60 and the left battery rail 62 extend in the front-rear direction. The right battery rail 60 is aligned with the left battery rail 62 in the left-right direction. In the left-right direction, the engagement portion 64 is disposed between the right battery rail 60 and the left battery rail 62. The right battery rail 60 extends downward from the lower surface 56a of the battery housing 56, then bends and extends to the right. The left battery rail 62 extends downward from the lower surface 56a of the battery housing 56, then bends and extends to the left.

[0143] As shown in FIG. 11, when the first battery pack BP1 is slid in the mounting direction D1, the first battery pack BP1 is guided by the first right rail portion 40 (see FIG. 7) and the first left rail portion 42 (see FIG. 7) and slides on the upper surface 34a of the first truncated pyramid portion 34. The mounting direction D1 is the forward direction. At this time, the right battery rail 60 (see FIG. 10) is slidably engaged with the first right rail portion 40, and the left battery rail 62 (see FIG. 10) is slidably engaged with the first left rail portion 42. When the first battery pack BP1 slides on the upper surface 34a and the engaging portion 64 abuts against the upper surface 34a, the engaging portion 64 is pushed into the inside of the battery housing 56 by the upper surface 34a. The upper surface 34a is formed with a recessed groove 34b recessed from the upper surface 34a. When the engagement portion 64 reaches the recessed groove 34b, it protrudes from the inside of the battery housing 56 to the outside and engages with the upper surface 34a in the recessed groove 34b. This causes the first battery pack BP1 to be attached to the first battery mounting portion 22. When the operation portion 66 is pushed in, the engagement portion 64 comes out of the recessed groove 34b, so that when the first battery pack BP1 is slid in the removal direction D2, the first battery pack BP1 is removed from the first battery mounting portion 22. The removal direction D2 is opposite to the mounting direction D1 and is the rear direction. Although not shown in the figure, the mounting direction in which the second battery pack BP2 is attached to the second battery mounting portion 24 is the same as the mounting direction D1. Also, the removal direction in which the second battery pack BP2 is removed from the second battery mounting portion 24 is the same as the removal direction D2.

[0144] As shown in FIG. 8, when the first battery pack BP1 is attached to the first battery mounting portion 22 and the second battery pack BP2 is attached to the second battery mounting portion 24, the lower surface 56a of the battery housing 56 of the first battery pack BP1 abuts against the first battery mounting portion 22 from above, and the lower surface 56a of the battery housing 56 of the second battery pack BP2 abuts against the second battery mounting portion 24 from above. The left surface 56b of the battery housing 56 of the first battery pack BP1 faces the right surface 56c of the battery housing 56 of the second battery pack BP2 in the left-right direction. The left surface 56b of the battery housing 56 of the first battery pack BP1 is approximately parallel to the right surface 56c of the battery housing 56 of the second battery pack BP2. No wall portion including the storage portion 20 is disposed between the left surface 56b of the battery housing 56 of the first battery pack BP1 and the right surface 56c of the battery housing 56 of the second battery pack BP2. The distance between the left side 56b of the battery housing 56 of the first battery pack BP1 and the right side 56c of the battery housing 56 of the second battery pack BP2 is 175 mm or less. In a modified example, the distance between the left side 56b of the battery housing 56 of the first battery pack BP1 and the right side 56c of the battery housing 56 of the second battery pack BP2 may be 350 mm or less.

[0145] As shown in Fig. 7, the motor unit 10 includes a first battery terminal 70, a second battery terminal 72, a main power switch 74, a display panel 76, an operation switch 78a, and a rotation speed change switch 78b. The first battery terminal 70 and the second battery terminal 72 are disposed on the upper surface 34a of the first truncated pyramid portion 34. The first battery terminal 70 is surrounded by the first battery mounting portion 22. The first battery terminal 70 includes a plurality of first terminal members 79. The first terminal members 79 are electrically connected to terminal members (not shown) of the first battery pack BP1 when the first battery pack BP1 is mounted on the first battery mounting portion 22.

[0146] The second battery terminal 72 is surrounded by the second battery mounting portion 24. The second battery terminal 72 includes a plurality of second terminal members 80. When the second battery pack BP2 is attached to the second battery mounting portion 24, the second terminal members 80 are electrically connected to terminal members (not shown) of the second battery pack BP2. In this embodiment, when the first battery pack BP1 is attached to the first battery mounting portion 22 and the second battery pack BP2 is attached to the second battery mounting portion 24, the first battery pack BP1 and the second battery pack BP2 are electrically connected in series. In a modified example, the second terminal members 80 may be electrically connected in parallel to the first terminal members 79.

[0147] The main power switch 74 and the display panel 76 are disposed in the second frustum portion 36. The main power switch 74 switches the motor unit 10 between an on state and an off state. The display panel 76 lights up when the motor unit 10 is in the on state.

[0148] The operation switch 78a is disposed behind the main power switch 74 and the display panel 76. The operation switch 78a is a rocker switch. When the right portion of the operation switch 78a is pressed into the main body housing 12, the left portion of the operation switch 78a pops out from the main body housing 12, and when the left portion of the operation switch 78a is pressed into the main body housing 12, the right portion of the operation switch 78a pops out from the main body housing 12. When the motor unit 10 is in the on state, if the left portion of the operation switch 78a is pressed into the main body housing 12, the motor unit 10 operates. When the right portion of the operation switch 78a is pressed into the main body housing 12 while the motor unit 10 is operating, the motor unit 10 stops.

[0149] The rotation speed change switch 78b is disposed in the second frustum of pyramid section 36. The rotation speed change switch 78b is disposed to the left of the display panel 76. The rotation speed change switch 78b changes the rotation speed of a motor 86, which will be described later.

[0150] As shown in Figure 12, the motor unit 10 includes a motor housing 84, a motor 86 (see Figure 16), a fan 88 (see Figure 16), a fixed unit 90, a plate member 92, a vibration-damping portion 94 (see Figures 18 and 19), a right cover member 96, a left cover member 98, a support unit 100, a control unit 102 (see Figure 25), and a cylindrical vibration-damping member 104 (see Figure 25).

[0151] 13, the motor housing 84 is surrounded by the accommodation portion 20. The accommodation portion 20 is disposed outside the motor housing 84. The motor housing 84 accommodates a motor 86 and a fan 88 therein. The motor housing 84 includes a motor housing main body 108, a front bracket 110, and a rear bracket 112.

[0152] The motor housing body 108 includes a tube portion 114, a partition wall portion 116, a screw boss portion 118 (see FIG. 14), and a leg portion 120. The tube portion 114 has a cylindrical shape. The partition wall portion 116 extends radially inward from the inner surface of the tube portion 114 toward the center of the tube portion 114. As shown in FIG. 14, the screw boss portion 118 protrudes upward from an upper portion of the tube portion 114. The leg portion 120 protrudes downward from a lower portion of the tube portion 114. As shown in FIG. 13, the leg portion 120 passes through the second opening 28.

[0153] The front bracket 110 is fixed to the front end of the motor housing main body 108 by a screw 121 (see FIG. 14). The front bracket 110, the tube portion 114, and the front surface of the partition wall portion 116 define a motor accommodating space 122. The front bracket 110 penetrates the first opening 26 of the main housing 12. The front bracket 110 is spaced apart from the outer edge of the first opening 26. The front bracket 110 and the outer edge of the first opening 26 define an intake port 26a. The intake port 26a is a part of the first opening 26. The intake port 26a communicates between the accommodation space 18 of the main housing 12 and the outside of the main housing 12. As shown in FIG. 15, the front bracket 110 has an exhaust port 124. The exhaust port 124 penetrates the front bracket 110 in the front-rear direction. The exhaust port 124 communicates between the motor accommodating space 122 and the outside of the motor housing 84.

[0154] As shown in Figure 16, the rear bracket 112 is fixed to the rear end of the motor housing main body 108 with screws 125 (see Figure 14). A fan accommodating space 126 is defined by the rear bracket 112, the tube portion 114, and the rear surface of the partition portion 116. The rear bracket 112 has a motor intake port 128. The rear bracket 112 passes through the motor intake port 128 in the front-rear direction. The motor intake port 128 communicates between the fan accommodating space 126 and the outside of the motor housing 84.

[0155] The motor 86 is disposed in the motor accommodating space 122. The motor 86 is, for example, a DC motor. In a modified example, the motor 86 may be an AC motor. The motor 86 is an outer rotor type brushless motor. In a modified example, the motor 86 may be an inner rotor type brushless motor or a brushed motor. The motor 86 operates when the left portion of the operation switch 78a (see FIG. 7) is pressed into the main body housing 12 while the motor unit 10 is in the on state. The motor 86 operates with power supplied from the battery pack BP.

[0156] As shown in FIG. 5, the weight of the motor 86 is 2 kg or more and 3 kg or less. The length of the motor 86 in the front-rear direction is 140 mm or more and 145 mm or less. The volume of the motor 86 is 650 cm 3 Above 750cm 3 The diameter of the motor 86 is 80 mm or more and 145 mm or less. As shown in FIG. 9, the maximum output value of the motor 86 is 1.5 kW or more and 4 kW or less. In a modified example, the maximum output value of the motor 86 may be 1.5 kW or more and 3 kW or less, or 1.5 kW or more and 2.35 kW or less. The maximum current value of the motor 86 is 15 A or more and 70 A or less. The torque of the motor 86 is 2 N·m or more and 11 N·m or less. In a modified example, the torque of the motor 86 may be 3 N·m or more and 8 N·m or less. The rotation speed of the motor 86 is 3000 rpm or more and 4300 rpm or less.

[0157] As shown in Fig. 16, the motor 86 includes a stator body 132, a coil 134, an outer rotor body 136, a plurality of permanent magnets 138, and a motor shaft 140. The coil 134 is wound around the stator body 132. The outer rotor body 136 is disposed so as to surround the outer circumferential surface of the stator body 132. The diameter of the outer rotor body 136 is substantially the same as the diameter of the motor 86. Each permanent magnet 138 is fixed to the outer rotor body 136.

[0158] The motor shaft 140 is fixed to the outer rotor body 136. When the motor unit 10 is placed on the mounting surface P1, the motor shaft 140 extends along the mounting surface P1. The motor shaft 140 penetrates the stator body 132. The motor shaft 140 penetrates the partition wall portion 116. The motor shaft 140 is rotatably supported by the partition wall portion 116 via a bearing 142. The motor shaft 140 penetrates the front bracket 110. The motor shaft 140 is rotatably supported by the front bracket 110 via a bearing 144. The motor shaft 140 rotates around a central axis 140a.

[0159] The fan 88 is fixed to the rear end of the motor shaft 140. The fan 88 is disposed in the fan accommodating space 126. In this embodiment, the fan 88 is a centrifugal fan. In a modified example, the fan 88 may be an axial fan. The fan 88 rotates integrally with the motor shaft 140.

[0160] The fixing unit 90 includes a first fixing portion 148 and a second fixing portion 150. The first fixing portion 148 is fixed to the lower end of the leg portion 120 by a screw 152. The first fixing portion 148 includes a first fixing surface 148a. The first fixing surface 148a corresponds to the lower surface of the first fixing portion 148. The first fixing surface 148a is approximately parallel to the motor shaft 140. When the motor unit 10 is placed on the placement surface P1, the first fixing surface 148a contacts the placement surface P1. The first fixing surface 148a is fixed to the working unit 4 (see FIG. 3).

[0161] 13, the first fixing portion 148 is disposed below the motor 86. The motor 86 is disposed between the first fixing portion 148 and the first battery attachment portion 22. The motor 86 is also disposed between the first fixing portion 148 and the second battery attachment portion 24 (see FIG. 12).

[0162] As shown in FIG. 16, the second fixing part 150 is formed on the front bracket 110. The second fixing part 150 has a second fixing surface 150a. The second fixing surface 150a corresponds to the front surface of the second fixing part 150. When the motor unit 10 is placed on the mounting surface P1, the second fixing surface 150a is perpendicular to the mounting surface P1. The second fixing surface 150a is approximately perpendicular to the first fixing surface 148a. The second fixing surface 150a is approximately perpendicular to the motor shaft 140. The second fixing surface 150a is fixed to the working unit 4 (see FIG. 2). The type of working unit 4 fixed to the second fixing surface 150a is different from the type of working unit 4 fixed to the first fixing surface 148a.

[0163] 17, the plate member 92 includes a plate body 154. The plate body 154 is formed by bending a single plate. The plate body 154 has a substantially U-shape. The plate body 154 is fixed to the screw boss portion 118 by a screw 155. The plate body 154 faces the upper, right, and left portions of the tube portion 114.

[0164] 18 and 19, the plate member 92 includes a first right sleeve 156, a second right sleeve 158, a third right sleeve 160, a first left sleeve 162, a second left sleeve 164, and a third left sleeve 166. The first right sleeve 156 has a cylindrical shape. The shapes of the second right sleeve 158, the third right sleeve 160, the first left sleeve 162, the second left sleeve 164, and the third left sleeve 166 are the same as the shape of the first right sleeve 156.

[0165] 18, the first right sleeve 156, the second right sleeve 158, and the third right sleeve 160 protrude rightward from the right wall 154a of the plate body 154. The first right sleeve 156 is disposed at the lower part of the right wall 154a. The second right sleeve 158 is disposed at the front upper part of the right wall 154a. The third right sleeve 160 is disposed at the rear upper part of the right wall 154a.

[0166] As shown in FIG. 20 , the first right sleeve 156 is disposed below the central axis 140a of the motor shaft 140. The second right sleeve 158 and the third right sleeve 160 are disposed above the central axis 140a of the motor shaft 140. The position of the second right sleeve 158 in the up-down direction is substantially the same as the position of the third right sleeve 160 in the up-down direction. In the front-rear direction, the first right sleeve 156 is disposed in the center between the second right sleeve 158 and the third right sleeve 160. The distance between the first right sleeve 156 and the second right sleeve 158 is substantially the same as the distance between the second right sleeve 158 and the third right sleeve 160 and the distance between the third right sleeve 160 and the first right sleeve 156.

[0167] As shown in FIG. 19, the first left sleeve 162, the second left sleeve 164, and the third left sleeve 166 protrude leftward from the left wall 154b of the plate body 154. The vertical and front-rear positions of the first left sleeve 162 are substantially the same as those of the first right sleeve 156. The vertical and front-rear positions of the second left sleeve 164 are substantially the same as those of the second right sleeve 158. The vertical and front-rear positions of the third left sleeve 166 are substantially the same as those of the third right sleeve 160. As shown in FIG. 21, the distance between the first left sleeve 162 and the second left sleeve 164 is substantially the same as the distance between the second left sleeve 164 and the third left sleeve 166 and the distance between the third left sleeve 166 and the first left sleeve 162. Moreover, the distance between the first left sleeve 162 and the second left sleeve 164 is approximately the same as the distance between the first right sleeve 156 (see FIG. 20) and the second right sleeve 158 (see FIG. 20).

[0168] As shown in FIG. 18 and FIG. 19, the vibration-isolating section 94 includes a first right vibration-isolating member 170, a second right vibration-isolating member 172, a third right vibration-isolating member 174, a first left vibration-isolating member 176, a second left vibration-isolating member 178, and a third left vibration-isolating member 180. The first right vibration-isolating member 170 has a cylindrical shape. The first right vibration-isolating member 170 is made of an elastic material. The first right vibration-isolating member 170 is made of, for example, a foam, a rubber material, a thermoplastic elastomer material, or a thermosetting elastomer material. The shapes of the second right vibration-isolating member 172, the third right vibration-isolating member 174, the first left vibration-isolating member 176, the second left vibration-isolating member 178, and the third left vibration-isolating member 180 are the same as the shapes of the first right vibration-isolating member 170. The material of the second right vibration-isolating member 172, the material of the third right vibration-isolating member 174, the material of the first left vibration-isolating member 176, the material of the second left vibration-isolating member 178, and the material of the third left vibration-isolating member 180 are the same as the material of the first right vibration-isolating member 170.

[0169] As shown in FIG. 18, the first right sleeve 156 is inserted into the opening 170a of the first right vibration isolating member 170. The second right sleeve 158 is inserted into the opening 172a of the second right vibration isolating member 172. The third right sleeve 160 is inserted into the opening 174a of the third right vibration isolating member 174. When the first right vibration isolating member 170 abuts against the right wall 154a of the plate body 154, it protrudes to the right of the first right sleeve 156. When the second right vibration isolating member 172 abuts against the right wall 154a of the plate body 154, it protrudes to the right of the second right sleeve 158. When the third right vibration isolating member 174 abuts against the right wall 154a of the plate body 154, it protrudes to the right of the third right sleeve 160. As shown in FIG. 20, the first right vibration isolating member 170 is disposed below the center of gravity G1 of the motor unit 10. The center of gravity G1 of the motor unit 10 is the center of gravity when the battery pack BP is not attached. The second right vibration isolating member 172 and the third right vibration isolating member 174 are disposed above the center of gravity G1 of the motor unit 10. The distance between the first right vibration isolating member 170 and the second right vibration isolating member 172 is approximately the same as the distance between the second right vibration isolating member 172 and the third right vibration isolating member 174, and the distance between the third right vibration isolating member 174 and the first right vibration isolating member 170. In the front-rear direction, the center position of the first right vibration isolating member 170 is approximately the same as the position of the center of gravity G1 of the motor unit 10.

[0170] As shown in FIG. 19, the first left sleeve 162 is inserted into the opening 176a of the first left vibration isolating member 176. The first left vibration isolating member 176 is disposed below the center of gravity G1 of the motor unit 10. The second left sleeve 164 is inserted into the opening 178a of the second left vibration isolating member 178. The third left sleeve 166 is inserted into the opening 180a of the third left vibration isolating member 180. The second left vibration isolating member 178 and the third left vibration isolating member 180 are disposed above the center of gravity G1 of the motor unit 10. When the first left vibration isolating member 176 abuts against the left wall 154b of the plate body 154, it protrudes leftward from the first left sleeve 162. When the second left vibration isolating member 178 abuts against the left wall 154b of the plate body 154, it protrudes leftward from the second left sleeve 164. When the third left vibration isolating member 180 abuts against the left wall 154b of the plate body 154, it protrudes further left than the third left sleeve 166. As shown in FIG. 21, the distance between the first left vibration isolating member 176 and the second left vibration isolating member 178 is approximately the same as the distance between the second left vibration isolating member 178 and the third left vibration isolating member 180, and the distance between the third left vibration isolating member 180 and the first left vibration isolating member 176. The distance between the first left vibration isolating member 176 and the second left vibration isolating member 178 is approximately the same as the distance between the first right vibration isolating member 170 (see FIG. 20) and the second right vibration isolating member 172 (see FIG. 20). In the front-rear direction, the center position of the first left vibration isolating member 176 is approximately the same as the position of the center of gravity G1 of the motor unit 10.

[0171] As shown in FIG. 22, when the motor unit 10 is placed on the placement surface P1, the first right vibration isolating member 170 and the first left vibration isolating member 176 are disposed below the upper end 86a of the motor 86. The upper end 86a of the motor 86 is substantially flush with the upper end of the outer rotor body 136. In FIGS. 20 to 23, the vertical position of the upper end 86a of the motor 86 is shown by a dashed line. The first right vibration isolating member 170 and the first left vibration isolating member 176 are disposed below the central axis 140a of the motor shaft 140. The first right vibration isolating member 170 and the first left vibration isolating member 176 are disposed above the lower end 86b of the motor 86. The lower end 86b of the motor 86 is substantially flush with the lower end of the outer rotor body 136. In FIGS. 20 to 23, the vertical position of the lower end 86b of the motor 86 is shown by a dashed line. The first right vibration isolating member 170 is disposed symmetrically with the first left vibration isolating member 176 with respect to an orthogonal plane P2 that is orthogonal to the placement surface P1 and includes the central axis 140a of the motor shaft 140 (i.e., the front-rear direction). The distance between the first right vibration isolating member 170 and the orthogonal plane P2 is substantially the same as the distance between the first left vibration isolating member 176 and the orthogonal plane P2. When the motor unit 10 is viewed in the front-rear direction, the motor 86 and the fan 88 are disposed between the first right vibration isolating member 170 and the first left vibration isolating member 176. When the motor unit 10 is viewed in the left-right direction, the motor 86 and the fan 88 at least partially overlap with the first right vibration isolating member 170 and the first left vibration isolating member 176 (see FIG. 21), respectively.

[0172] As shown in FIG. 23, when the motor unit 10 is placed on the placement surface P1, the second right vibration isolating member 172 and the second left vibration isolating member 178 are disposed above the lower end 86b of the motor 86. The second right vibration isolating member 172 and the second left vibration isolating member 178 are disposed above the central axis 140a of the motor shaft 140. The vertical center of the second right vibration isolating member 172 and the vertical center of the second left vibration isolating member 178 are disposed below the upper end 86a of the motor 86. The upper end of the second right vibration isolating member 172 and the upper end of the second left vibration isolating member 178 are disposed above the upper end 86a of the motor 86. The second right vibration isolating member 172 is disposed symmetrically with the second left vibration isolating member 178 with respect to the orthogonal plane P2. The distance between the second right vibration isolating member 172 and the orthogonal plane P2 is substantially the same as the distance between the second left vibration isolating member 178 and the orthogonal plane P2. When the motor unit 10 is viewed in the front-rear direction, the motor 86 and the fan 88 (see FIG. 22) are disposed between the second right vibration isolating member 172 and the second left vibration isolating member 178. When the motor unit 10 is viewed in the front-rear direction, the second right vibration isolating member 172 entirely overlaps with the third right vibration isolating member 174 (see FIG. 20), and the second left vibration isolating member 178 entirely overlaps with the third left vibration isolating member 180 (see FIG. 21). The third right vibration isolating member 174 is disposed symmetrically with the third left vibration isolating member 180 with respect to the orthogonal plane P2. Furthermore, when the motor unit 10 is viewed in the front-rear direction, the motor 86 and the fan 88 are disposed between the third right vibration isolating member 174 and the third left vibration isolating member 180.

[0173] When the motor unit 10 is viewed in the left-right direction, the motor 86 is disposed between the second right vibration isolating member 172 and the second left vibration isolating member 178 (see FIG. 21). As shown in FIG. 20, the second right vibration isolating member 172 and the second left vibration isolating member 178 are disposed in front of the fan 88. The third right vibration isolating member 174 and the third left vibration isolating member 180 (see FIG. 21) are disposed behind the fan 88.

[0174] As shown in FIG. 18, the right cover member 96 is disposed on the right side of the right wall 154a of the plate body 154. The first right vibration isolating member 170, the second right vibration isolating member 172, and the third right vibration isolating member 174 are sandwiched between the right cover member 96 and the right wall 154a of the plate body 154. The right cover member 96 is attached to the plate body 154 via the first right vibration isolating member 170, the second right vibration isolating member 172, and the third right vibration isolating member 174. The right cover member 96 does not abut against the plate member 92. As shown in FIG. 12, the right cover member 96 is disposed between the right main body housing 14 and the right wall 154a of the plate body 154. The right cover member 96 is fixed to the right main body housing 14. This prevents the first right vibration isolating member 170 (see FIG. 18), the second right vibration isolating member 172 (see FIG. 18), and the third right vibration isolating member 174 (see FIG. 18) from coming off the plate member 92.

[0175] As shown in FIG. 19, the left cover member 98 is disposed on the left side of the left wall 154b of the plate body 154. The first left vibration isolating member 176, the second left vibration isolating member 178, and the third left vibration isolating member 180 are sandwiched between the left cover member 98 and the left wall 154b of the plate body 154. The left cover member 98 is attached to the plate body 154 via the first left vibration isolating member 176, the second left vibration isolating member 178, and the third left vibration isolating member 180. The left cover member 98 does not abut against the plate member 92. As shown in FIG. 12, the left cover member 98 is disposed between the left body housing 16 and the left wall 154b of the plate body 154. The left cover member 98 is fixed to the left body housing 16. This prevents the first left vibration isolating member 176 (see FIG. 19), the second left vibration isolating member 178 (see FIG. 19), and the third left vibration isolating member 180 (see FIG. 19) from coming off the plate member 92.

[0176] As shown in Fig. 24, the support unit 100 includes a support plate 184. The support plate 184 is formed by bending a single plate. The support plate 184 has a substantially U-shape. The support plate 184 includes an upper wall 184a facing the upper surface of the plate body 154 of the plate member 92, a right wall 184b facing the right surface of the right cover member 96, and a left wall 184c facing the left surface of the left cover member 98. The plate member 92, the right cover member 96, and the left cover member 98 are sandwiched between the right wall 184b and the left wall 184c.

[0177] The upper wall 184a has two right positioning holes 185a and two left positioning holes 185b. The right positioning hole 185a penetrates the upper wall 184a in the up-down direction. The right positioning hole 185a is disposed at the right end of the upper wall 184a. The two right positioning holes 185a are lined up in the front-rear direction. The left positioning hole 185b penetrates the upper wall 184a in the up-down direction. The left positioning hole 185b is disposed at the left end of the upper wall 184a. The two left positioning holes 185b are lined up in the front-rear direction.

[0178] The right cover member 96 has two right positioning protrusions 96a that protrude upward, and the right positioning holes 185a receive the right positioning protrusions 96a. The left cover member 98 has two left positioning protrusions 98a that protrude upward, and the left positioning holes 185b receive the left positioning protrusions 98a. This positions the support plate 184 relative to the right cover member 96 and the left cover member 98. The support plate 184 is fixed to the right cover member 96 by a screw 185c. The support plate 184 is fixed to the left cover member 98 by a screw 185d.

[0179] 22, the right wall 184b is sandwiched between the right surface of the right cover member 96 and the right main body housing 14. The right wall 184b, the right cover member 96, and the right main body housing 14 are fixed to one another with screws 186. The left wall 184c is sandwiched between the left surface of the left cover member 98 and the left main body housing 16. The left wall 184c, the left cover member 98, and the left main body housing 16 are fixed to one another with screws 188.

[0180] As shown in FIG. 25, the control unit 102 is disposed on the rear side of the motor housing 84. The control unit 102 is disposed inside the main body housing 12 (see FIG. 4). The control unit 102 includes a board housing 192, a filter member 194 (see FIG. 26), a control circuit board 196 (see FIG. 26), and a board case 197 (see FIG. 26). The board housing 192 includes an outer housing portion 198 and an inner housing portion 199 (see FIG. 26). The outer housing portion 198 defines the outer shape of the control unit 102. The outer housing portion 198 is fixed to the rear end of the support plate 184 by a screw 190. As shown in FIG. 26, the outer housing portion 198 has an internal space 200 therein. The outer housing portion 198 also has an intake port 202. The intake port 202 is located at the rear of the outer housing portion 198. The intake port 202 communicates the interior space 200 with the outside of the substrate housing 192 .

[0181] The inner housing part 199 is disposed in the internal space 200. The inner housing part 199 is disposed in front of the intake port 202. The inner housing part 199 is fixed to the outer housing part 198. The inner housing part 199 has a board accommodating space 203 therein.

[0182] The filter member 194 is disposed in the internal space 200. The filter member 194 is disposed in front of the intake port 202. The filter member 194 blocks the intake port 202. The filter member 194 has fine air holes (not shown) therein. The filter member 194 is made of, for example, a filter material or a foam material. Air flows through the air holes in the filter member 194. The filter member 194 removes foreign matter such as dust that flows with the air as the air flows through the air holes.

[0183] The control circuit board 196 is disposed in the board housing space 203. The control circuit board 196 has a microcomputer and a plurality of switching elements. The switching elements are, for example, IGBTs or MOSFETs. The switching elements are switched between an on state and an off state by being controlled by the microcomputer. The control circuit board 196 is disposed along a surface along the up-down direction and the left-right direction. The control circuit board 196 is disposed in front of the intake port 202. The control circuit board 196 is disposed behind the motor intake port 128 of the rear bracket 112. The control circuit board 196 controls the motor 86 (see FIG. 13). As shown in FIG. 13, the control circuit board 196 is disposed on the central axis 140a of the motor shaft 140. The control circuit board 196 is disposed behind the fan 88. When the motor unit 10 is viewed in the front-rear direction, the control circuit board 196 at least partially overlaps with each of the motor 86 and the fan 88. The motor 86, the fan 88, and the control circuit board 196 are aligned in a line in the front-to-rear direction.

[0184] As shown in FIG. 26, the board case 197 is disposed in the board accommodation space 203. The board case 197 is disposed in front of the intake port 202. The board case 197 is disposed between the control circuit board 196 and the intake port 202. The board case 197 supports the control circuit board 196. The control circuit board 196 is disposed inside the board case 197. The board case 197 is fixed to the inner housing part 199. The board case 197 is provided with a heat dissipation fin 204. The heat dissipation fin 204 has a flat plate shape extending in the up-down direction and the front-rear direction. The inner housing part 199 has a through hole 199a penetrating the rear end of the inner housing part 199, and the heat dissipation fin 204 penetrates the through hole 199a. The heat dissipation fin 204 faces the intake port 202 in the front-rear direction.

[0185] The cylindrical vibration-damping member 104 is disposed in front of the board housing 192 and behind the rear bracket 112. The cylindrical vibration-damping member 104 is made of an elastic material. The material of the cylindrical vibration-damping member 104 is the same as that of the first right vibration-damping member 170 (see FIG. 18). The cylindrical vibration-damping member 104 has a cylindrical shape. Here, the cylindrical shape includes a bellows shape having a circular cross section. The cylindrical vibration-damping member 104 has an air passage 208 therein. The cylindrical vibration-damping member 104 is fixed to the front end of the board housing 192 and the rear end of the rear bracket 112. The front end of the board housing 192 is open, and the cylindrical vibration-damping member 104 surrounds the front end of the board housing 192. The air passage 208 communicates with the internal space 200 via the front end of the board housing 192. The cylindrical vibration-isolating member 104 surrounds the motor intake port 128 of the rear bracket 112. The air passage 208 communicates with the fan accommodating space 126 via the motor intake port 128. As shown in Figure 13, when the motor unit 10 is viewed in the front-rear direction, the air passage 208 at least partially overlaps with each of the motor 86 and the fan 88.

[0186] When the control circuit board 196 controls the motor 86 to operate, the motor shaft 140 rotates and the fan 88 rotates. As shown in FIG. 15, air passes through the intake port 26a and flows from the outside of the motor unit 10 into the accommodation space 18 of the main body housing 12. In the drawing, the flow of air is indicated by an arrow line labeled with the symbol F1. The flowing air flows rearward between the motor housing 84 and the plate member 92, between the plate member 92 and the support plate 184, and between the support plate 184 and the upper wall 20c of the main body housing 12.

[0187] As shown in FIG. 26, the air flows around the outer housing part 198, passes through the intake port 202, and flows into the internal space 200. The air passes through the filter member 194, and flows upward along the heat dissipation fins 204 between the outer housing part 198 and the inner housing part 199. As the air passes through the filter member 194, foreign matter flowing with the air is removed from the air. In addition, as the air flows along the heat dissipation fins 204, the control circuit board 196 is cooled. Next, the air flows forward between the outer housing part 198 and the inner housing part 199, passes through the air passage 208 of the cylindrical vibration-proof member 104 and the motor intake port 128 of the rear bracket 112, and flows from the internal space 200 into the fan accommodating space 126.

[0188] As shown in FIG. 15 , the air that has flowed into the fan accommodating space 126 is sent by the fan 88 in a direction away from the central axis 140a (toward the radial outside of the fan 88). Next, the air flows from the fan accommodating space 126 into the motor accommodating space 122. The air that has flowed into the motor accommodating space 122 flows forward between the inside and outside of the motor 86, thereby cooling the motor 86. The air then passes through the exhaust port 124 of the front bracket 110 and is discharged from the motor accommodating space 122 to the outside of the motor unit 10.

[0189] 2, 3, and 27 to 33, the motor unit 10 is applicable to a plurality of types of working units 4. In Fig. 2, 3, and 27 to 33, the coordinate system is changed to a different coordinate system from the coordinate system related to the motor unit 10 described above for explanation. Specifically, the direction perpendicular to the placement surface P1 is called the up-down direction, the direction perpendicular to the up-down direction is called the front-rear direction, and the direction perpendicular to the up-down direction and the front-rear direction is called the left-right direction.

[0190] As shown in Fig. 27, the motor unit 10 can be attached to a rammer 4a. The rammer 4a is a ground compaction device that compacts the ground. The rammer 4a includes an upper housing 300, a handle unit 302, and a working unit 304. The upper housing 300 includes a fixing base 308 located at the rear upper portion. The fixing base 308 is fixed to the second fixing surface 150a of the motor unit 10.

[0191] Before describing the detailed configuration of the fixing base 308, the detailed configuration of the second fixing part 150 of the motor unit 10 will be described. As shown in FIG. 28, the second fixing part 150 has two positioning holes 150b, four first fixing holes 150c, four second fixing holes 150d, and an auxiliary hole 150e. The positioning holes 150b, the first fixing holes 150c, the second fixing holes 150d, and the auxiliary hole 150e are arranged on the second fixing surface 150a. The arrangement of the two positioning holes 150b, the four first fixing holes 150c, the four second fixing holes 150d, and the auxiliary hole 150e is the same as the arrangement of the multiple holes of the engine unit that can be attached to the rammer 4a. Therefore, the motor unit 10 can be used by fixing the second fixing part 150 to the working unit 4 to which the engine unit can be attached.

[0192] Each of the two positioning holes 150b is spaced a certain distance from the central axis 140a of the motor shaft 140. The two positioning holes 150b are arranged at intervals of 180 degrees around the central axis 140a. The two positioning holes 150b are arranged on an orthogonal plane P2.

[0193] Each of the four first fixing holes 150c is spaced a certain distance from the central axis 140a. The four first fixing holes 150c are arranged at 90 degree intervals around the central axis 140a. The distance between the first fixing holes 150c and the central axis 140a is slightly shorter than the distance between the positioning hole 150b and the central axis 140a. Two of the first fixing holes 150c are arranged to the right of the orthogonal plane P2, and the remaining two first fixing holes 150c are arranged to the left of the orthogonal plane P2.

[0194] Each of the four second fixing holes 150d is spaced a certain distance from the central axis 140a. The distance between the second fixing holes 150d and the central axis 140a is longer than the distance between the positioning hole 150b and the central axis 140a. Two of the second fixing holes 150d are disposed to the right of the orthogonal plane P2, and the remaining two second fixing holes 150d are disposed to the left of the orthogonal plane P2. The auxiliary hole 150e is slightly farther from the central axis 140a than the second fixing holes 150d.

[0195] 29, the fixing base 308 has two positioning holes 308a and four fixing holes 308b. The arrangement of the two positioning holes 308a and the four fixing holes 308b is the same as the arrangement of the two positioning holes 150b and the four second fixing holes 150d of the second fixing part 150.

[0196] As shown in FIG. 29 and FIG. 30, when the second fixing part 150 is fixed to the fixing base 308, first, the two positioning pins 309a are inserted into the positioning holes 308a and 150b. As a result, the second fixing part 150 is positioned relative to the fixing base 308. As a result, the fixing hole 308b faces the second fixing hole 150d. Next, the four screws 309b are inserted into the fixing holes 308b and screwed into the second fixing holes 150d. As a result, the second fixing part 150 is fixed to the fixing base 308 in a state where it is positioned relative to the fixing base 308. When the second fixing part 150 is fixed to the fixing base 308, the motor shaft 140 of the motor unit 10 protrudes downward from the main body housing 12.

[0197] As shown in FIG. 2, the handle unit 302 includes a first handle 310, a second handle 312, and a third handle 314. The first handle 310 extends rearward from the upper end of the upper housing 300, then bends to extend rightward, and then bends to extend forward. The first handle 310 surrounds the motor unit 10. The second handle 312 extends upward from the upper end of the upper housing 300, then bends to extend rightward, and then bends to extend downward. The third handle 314 extends forward and downward from the upper end of the upper housing 300, then bends to extend rightward, and then bends to extend rearward and upward. The first handle 310, the second handle 312, and the third handle 314 are integrally formed. At least one of the first handle 310, the second handle 312, and the third handle 314 is held by a user during work.

[0198] As shown in FIG. 27, the working unit 304 includes an extendable unit 320, a ground leveling unit 322, a shaft receiving unit 324, and a drive unit 326. The extendable unit 320 is fixed to the lower part of the upper housing 300. The extendable unit 320 is extendable. The ground leveling unit 322 is disposed below the upper housing 300. The upper part of the ground leveling unit 322 is surrounded by the extendable unit 320. The ground leveling unit 322 is fixed to the extendable unit 320. The ground leveling unit 322 includes a ground leveling plate 328 located at the lower end. The ground leveling plate 328 comes into surface contact with the placement surface P1.

[0199] The shaft receiving portion 324 and the driving portion 326 are disposed inside the upper housing 300. The shaft receiving portion 324 is fixed to the motor shaft 140 of the motor unit 10. The driving portion 326 is fixed to the shaft receiving portion 324. The driving portion 326 operates the ground leveling portion 322 when the motor shaft 140 rotates. This repeatedly executes a moving away operation that moves the ground leveling portion 322 away from the mounting surface P1 and an approaching operation that moves the ground leveling portion 322 closer to the mounting surface P1. The ground leveling plate 328 is repeatedly pressed against the mounting surface P1, thereby hardening the mounting surface P1, such as the ground.

[0200] As shown in Fig. 31, the motor unit 10 can be attached to a plate compactor 4b. The plate compactor 4b is a ground compaction device that compacts the ground. The force with which the plate compactor 4b compacts the ground is smaller than the force with which the rammer 4a compacts the ground. The plate compactor 4b includes a base 350, a handle unit 352, a transmission device 354, and a working unit 356.

[0201] The base 350 includes a fixing base 360. The fixing base 360 ​​is fixed to the first fixing surface 148a of the motor unit 10.

[0202] Before describing the detailed configuration of the fixing base 360, the detailed configuration of the first fixing portion 148 of the motor unit 10 will be described. As shown in FIG. 32, the first fixing portion 148 has a first positioning hole 148b, a second positioning hole 148c, a first fixing hole 148d, and a second fixing hole 148e. The first positioning hole 148b, the second positioning hole 148c, the first fixing hole 148d, and the second fixing hole 148e are arranged on the first fixing surface 148a. The first positioning hole 148b, the second positioning hole 148c, the first fixing hole 148d, and the second fixing hole 148e penetrate the first fixing portion 148 in the up-down direction. The arrangement of the first positioning hole 148b, the second positioning hole 148c, the first fixing hole 148d, and the second fixing hole 148e is the same as the arrangement of the holes of the engine unit that can be attached to the plate compactor 4b. In addition, the distance between the first fixing surface 148a and the central axis 140a of the motor shaft 140 (see FIG. 28) is the same as the distance between the fixing surface of the engine unit and the shaft of the engine. Therefore, the motor unit 10 can be used by fixing the first fixing part 148 to the working unit 4 to which the engine unit can be attached.

[0203] The first positioning hole 148b and the second positioning hole 148c are disposed at the front end of the first fixing portion 148. The first positioning hole 148b and the second positioning hole 148c are aligned in the left-right direction. The first positioning hole 148b is a round hole. The second positioning hole 148c is an elongated hole extending in the left-right direction.

[0204] The first fixing hole 148d and the second fixing hole 148e are disposed at the rear end of the first fixing portion 148. The first fixing hole 148d and the second fixing hole 148e are aligned in the left-right direction. The first fixing hole 148d and the first positioning hole 148b are aligned in the front-rear direction. The shape of the first fixing hole 148d is substantially the same as the shape of the first positioning hole 148b. The second fixing hole 148e and the second positioning hole 148c are aligned in the front-rear direction. The shape of the second fixing hole 148e is substantially the same as the shape of the second positioning hole 148c.

[0205] The fixed base 360 ​​has a first positioning protrusion 361a, a second positioning protrusion 361b, a first fixing hole 361c, and a second fixing hole 361d. The first positioning protrusion 361a and the second positioning protrusion 361b protrude upward from an upper surface 360a of the fixed base 360. The first positioning protrusion 361a and the second positioning protrusion 361b have a cylindrical shape. The first positioning protrusion 361a and the second positioning protrusion 361b are aligned in the left-right direction.

[0206] The first fixing hole 361c and the second fixing hole 361d are aligned in the left-right direction. The first fixing hole 361c and the first positioning protrusion 361a are aligned in the front-rear direction. The second fixing hole 361d and the second positioning protrusion 361b are aligned in the front-rear direction.

[0207] The first fixing hole 361c includes a first long hole portion 361c1 extending in the front-rear direction and a first round hole portion 361c2 disposed at the lower end of the first long hole portion 361c1. The second fixing hole 361d includes a second long hole portion 361d1 extending in the front-rear direction and a second round hole portion 361d2 disposed at the lower end of the second long hole portion 361d1.

[0208] When the first fixing part 148 is fixed to the fixing base 360, first, the first positioning protrusion 361a is inserted into the first positioning hole 148b, and the second positioning protrusion 361b is inserted into the second positioning hole 148c. This positions the first fixing part 148 relative to the fixing base 360. In addition, since the second positioning hole 148c is an elongated hole, the first fixing part 148 can be positioned relative to the fixing base 360 ​​even when the distance between the first positioning protrusion 361a and the second positioning protrusion 361b varies from product to product. Next, the screw 362a is inserted from the upper side of the first fixing part 148 into the first fixing hole 361c and the first elongated hole portion 361c1, and screwed into the first round hole portion 361c2. Next, the screw 362a is inserted from above the first fixing portion 148 into the second fixing hole 361d and the second long hole portion 361d1, and screwed into the second round hole portion 361d2. Next, the two nuts 362b are screwed into the first positioning protrusion 361a and the second positioning protrusion 361b, respectively. As a result, the first fixing portion 148 is fixed to the upper surface 360a of the fixing base 360 ​​in a state where it is positioned relative to the fixing base 360. When the first fixing portion 148 is fixed to the fixing base 360, the motor shaft 140 of the motor unit 10 extends in the left-right direction.

[0209] 3, the handle unit 352 includes a first handle 364 and a second handle 366. The first handle 364 extends from the rear end of the base 350 to the upper rear side, then bends and extends to the right, and further bends and extends to the lower front side. The first handle 364 is disposed on the rear side of the motor unit 10. The first handle 364 is gripped by the user during work.

[0210] The second handle 366 extends upward from the rear end of the base 350, then bends to extend forward and upward, further bends to extend forward, and further bends to extend downward. The second handle 366 is disposed so as to surround the motor unit 10. The second handle 366 is gripped by a user, for example, when lifting the plate compactor 4b.

[0211] 31 , the transmission device 354 includes a first pulley 370, a belt 372, and a second pulley 374. The first pulley 370 is fixed to the motor shaft 140. The belt 372 is stretched between the first pulley 370 and the second pulley 374. The second pulley 374 is disposed forward of the first pulley 370.

[0212] The working unit 356 includes a vibrator 378 and a leveling plate 380. The vibrator 378 is fixed to the second pulley 374. When the second pulley 374 rotates, the vibrator 378 operates the leveling plate 380. This causes the leveling plate 380 to move up and down. The leveling plate 380 is repeatedly pressed against the support surface P1, thereby hardening the support surface P1, such as the ground.

[0213] When the rammer 4a (see FIG. 27) and the plate compactor 4b operate, the rammer 4a and the plate compactor 4b vibrate. As a result, the vibration of the rammer 4a and the plate compactor 4b is transmitted to the motor unit 10 via the motor shaft 140. As shown in FIG. 22, the vibration transmitted to the motor shaft 140 is transmitted from the motor 86 to the motor housing 84. Next, the vibration is transmitted from the motor housing 84 to the plate member 92, and then to the vibration-proof part 94. When vibrations are transmitted to the vibration-isolating part 94, the first right vibration-isolating member 170, the second right vibration-isolating member 172 (see FIG. 18), and the third right vibration-isolating member 174 (see FIG. 18) elastically deform in the up-down direction, the left-right direction, and the front-rear direction between the right wall 154a of the plate member 92 and the right cover member 96, and the first left vibration-isolating member 176, the second left vibration-isolating member 178 (see FIG. 18), and the third left vibration-isolating member 180 (see FIG. 18) elastically deform in the up-down direction, the left-right direction, and the front-rear direction between the left wall 154b of the plate member 92 and the left cover member 98. This dampens the vibrations, and the transmission of the vibrations to the right cover member 96 and the left cover member 98 is suppressed. This prevents vibrations from being transmitted to the battery pack BP (see FIG. 4) via the main housing 12, and also prevents vibrations from being transmitted to the control circuit board 196 (see FIG. 26) of the control unit 102 via the support unit 100.

[0214] 26, the vibrations transmitted to the motor housing 84 are transmitted to the cylindrical vibration-damping member 104. When the vibrations are transmitted to the cylindrical vibration-damping member 104, the cylindrical vibration-damping member 104 elastically deforms in the up-down, left-right, and front-rear directions between the motor housing 84 and the board housing 192. This dampens the vibrations and suppresses their transmission to the board housing 192. As a result, the vibrations are suppressed from being transmitted to the control circuit board 196.

[0215] As shown in FIG. 33, the motor unit 10 can be attached to a slope grass cutter 4c. The slope grass cutter 4c is a device for cutting grass. The slope grass cutter 4c includes a housing 400, a pair of front wheels 402, a pair of rear wheels 404, a handle unit 406, and a working unit 408. The housing 400 includes a fixing base 412 located at an upper portion. The fixing base 412 is fixed to a second fixing surface 150a of the motor unit 10. The motor shaft 140 of the motor unit 10 protrudes downward from the main housing 12.

[0216] The pair of front wheels 402 are rotatably supported on the front part of the housing 400. The pair of rear wheels 404 are rotatably supported on the rear part of the housing 400. As the pair of front wheels 402 and the pair of rear wheels 404 rotate, the slope grass mower 4c moves on the mounting surface P1.

[0217] The handle unit 406 includes a fixed frame 416, a handle 418, and a trigger 420. The fixed frame 416 has a substantially U-shape. Both ends of the fixed frame 416 in the longitudinal direction are fixed to the housing 400.

[0218] The handle 418 is attached to the upper part of the fixed frame 416. A user moves the slope grass mower 4c by gripping the handle 418 and pushing it forward.

[0219] The trigger 420 is rotatably attached to the handle 418. The trigger 420 is operated by a user's hand holding the handle 418 so as to approach the handle 418. When the trigger 420 is operated, the motor 86 of the motor unit 10 operates.

[0220] The working unit 408 includes a connecting portion 424, a transmission shaft 426, and a blade 428. The connecting portion 424 connects the motor shaft 140 and the transmission shaft 426.

[0221] The transmission shaft 426 extends in the vertical direction. The transmission shaft 426 rotates integrally with the motor shaft 140 around a central axis 140a that extends in the vertical direction.

[0222] The blade 428 is fixed to the lower end of the transmission shaft 426. The blade 428 rotates around the central axis 140a together with the transmission shaft 426. This causes the grass to be cut.

[0223] (effect) The motor unit 10 of this embodiment is detachably attached to each of a plurality of types of working units 4, and operates the working units 4. The motor unit 10 includes a main body housing 12 including an accommodation section 20 having an upper wall 20c (an example of a first wall), a first battery mounting section 22 arranged on the upper wall 20c, and a second battery mounting section 24 arranged on the upper wall 20c, and a motor 86 arranged inside the accommodation section 20 and operates the working unit 4. A first battery pack BP1 (an example of a first battery) that supplies power to the motor 86 is attached to the first battery mounting section 22 so as to be slidable along the upper wall 20c. A second battery pack BP2 (an example of a second battery) that supplies power to the motor 86 is attached to the second battery mounting section 24 so as to be slidable along the upper wall 20c. The accommodation section 20 is not disposed between the first battery pack BP1 attached to the first battery mounting section 22 and the second battery pack BP2 attached to the second battery mounting section 24. The first battery pack BP1 has a left surface 56b (an example of a first side surface). The second battery pack BP2 has a right surface 56c (an example of a second side surface) that faces the left surface 56b and is arranged parallel to the left surface 56b when the first battery pack BP1 is attached to the first battery mounting portion 22 and the second battery pack BP2 is attached to the second battery mounting portion 24.

[0224] The first battery pack BP1 and the second battery pack BP2 are small batteries with high versatility. According to the above configuration, the first battery pack BP1 is attached to the first battery mounting portion 22, and the second battery pack BP2 is attached to the second battery mounting portion 24. This allows the first battery pack BP1 and the second battery pack BP2, which are small and versatile, to be used in the motor unit 10. In addition, since the left surface 56b of the first battery pack BP1 faces the right surface 56c of the second battery pack BP2 in parallel, the motor unit 10 to which the first battery pack BP1 and the second battery pack BP2 are attached can be made smaller than a configuration in which the left surface 56b of the first battery pack BP1 does not face the right surface 56c of the second battery pack BP2 in parallel.

[0225] In addition, when the first battery pack BP1 is attached to the first battery mounting portion 22 and the second battery pack BP2 is attached to the second battery mounting portion 24, the motor unit 10 does not have a wall portion disposed between the left surface 56b of the first battery pack BP1 and the right surface 56c of the second battery pack BP2.

[0226] According to the above configuration, the motor unit 10 to which the first battery pack BP1 and the second battery pack BP2 are attached can be made even smaller.

[0227] Furthermore, when the motor unit 10 is placed on the placement surface P1, the upper wall 20c is disposed above the motor 86.

[0228] The motor 86 is a heavy component. The weight of the motor 86 is greater than the weight of the first battery pack BP1 and the weight of the second battery pack BP2. According to the above configuration, the heavy motor 86 can be disposed at a position closer to the placement surface P1 than the first battery pack BP1 and the second battery pack BP2.

[0229] The upper wall 20c also has an upper surface 34a (an example of a first surface) on which the first battery mounting portion 22 and the second battery mounting portion 24 are disposed.

[0230] According to the above configuration, the first battery pack BP1 can be easily attached to the first battery attachment portion 22, and the second battery pack BP2 can be easily attached to the second battery attachment portion 24.

[0231] The motor unit 10 is further provided with an elastically deformable vibration isolating portion 94 (an example of a vibration isolating member) that is disposed between the motor 86 and the main body housing 12.

[0232] According to the above configuration, it is possible to suppress the transmission of vibrations from the motor 86 to the main body housing 12. This makes it possible to suppress the transmission of vibrations to the first battery pack BP1 and the second battery pack BP2.

[0233] The motor unit 10 further includes a motor housing 84 that houses the motor 86, and a plate member 92 that is fixed to the motor housing 84. The vibration isolating portion 94 is fixed to the plate member 92 and the main housing 12.

[0234] If the vibration-proof portion 94 were directly fixed to the motor housing 84, the configuration of the motor housing 84 would be complicated. With the above-described configuration, the configuration of the motor housing 84 can be prevented from becoming complicated.

[0235] In addition, the motor unit 10 is arranged inside the accommodating section 20 and further includes a control unit 102 that controls the motor 86, and a support unit 100 that supports the control unit 102 and is fixed to the plate member 92 via a vibration-isolating section 94.

[0236] According to the above configuration, the transmission of vibrations to the control unit 102 can be suppressed.

[0237] Each of the first battery pack BP1 and the second battery pack BP2 may include a hook 58 that is operated by a user. The main body housing 12 includes a recessed groove 34b (an example of an engaged portion) that engages with the hook 58.

[0238] According to the above configuration, the first battery pack BP1 and the second battery pack BP2 engage with the recessed groove 34b of the main body housing 12, thereby preventing the first battery pack BP1 and the second battery pack BP2 from coming off the main body housing 12.

[0239] Furthermore, when the motor unit 10 is viewed in a vertical direction perpendicular to the upper wall 20c, the first battery attachment portion 22 does not overlap with the second battery attachment portion 24.

[0240] According to the above configuration, when the motor unit 10 is viewed in the up-down direction perpendicular to the upper wall 20c, the structure of the upper wall 20c is prevented from becoming complicated, compared to a configuration in which the first battery mounting portion 22 overlaps with the second battery mounting portion 24.

[0241] Furthermore, a first battery pack BP1 is attached to the first battery attachment portion 22 so as to be slidable in the front-rear direction (an example of a first direction) along the upper wall 20c. A second battery pack BP2 is attached to the second battery attachment portion 24 so as to be slidable in the front-rear direction. The motor 86 extends in the front-rear direction and includes a motor shaft 140 fixed to the working unit 4.

[0242] According to the above configuration, based on the attitude of motor shaft 140, the direction in which the first battery pack BP1 and the direction in which the second battery pack BP2 are slid can be easily grasped.

[0243] The motor unit 10 is further provided with a control unit 102 that is disposed inside the housing 20 and controls the motor 86. When the motor unit 10 is viewed in the front-rear direction, the control unit 102 at least partially overlaps the motor 86.

[0244] According to the above configuration, when the motor unit 10 is viewed in the front-to-rear direction, the motor unit 10 is prevented from becoming larger in the direction perpendicular to the front-to-rear direction, compared to a configuration in which the control unit 102 does not at least partially overlap the motor 86.

[0245] In addition, the motor unit 10 further includes a first fixing portion 148 (an example of a fixing portion) that is fixed to the working unit 4. The motor 86 is disposed between the first fixing portion 148 and the first battery attachment portion 22, and between the first fixing portion 148 and the second battery attachment portion 24.

[0246] According to the above configuration, interference between the first battery pack BP1 and the second battery pack BP2 and the working unit 4 can be suppressed.

[0247] The motor unit 10 of this embodiment is detachably attached to each of a plurality of types of working units 4, and operates the working units 4. The motor unit 10 includes a storage section 20 having an upper wall 20c (an example of a first wall), a main body housing 12 including a first battery mounting section 22 arranged on the upper wall 20c, and a second battery mounting section 24 arranged on the upper wall 20c, and a motor 86 arranged inside the storage section 20 and operating the working unit 4. A first battery pack BP1 (an example of a first battery) that supplies power to the motor 86 is attached to the first battery mounting section 22. A second battery pack BP2 (an example of a second battery) that supplies power to the motor 86 is attached to the second battery mounting section 24. The maximum output value of the motor 86 is 1.5 kW or more and 2.35 kW or less.

[0248] The first battery pack BP1 and the second battery pack BP2 are small, versatile batteries. According to the above configuration, the first battery pack BP1 is attached to the first battery mounting portion 22, and the second battery pack BP2 is attached to the second battery mounting portion 24. The motor 86, whose maximum output value is 1.5 kW or more and 2.35 kW or less, is used to operate a relatively high-output working unit 4. This allows the versatile, small-sized first battery pack BP1 and second battery pack BP2 to be used in the motor unit 10 to operate a relatively high-output working unit 4.

[0249] The torque of the motor 86 is not less than 2.0 N·m and not more than 11.0 N·m. The rotation speed of the motor 86 is not less than 3000 rpm and not more than 4300 rpm.

[0250] The motor 86, which has a torque of 2.0 N·m or more and 11.0 N·m or less and a rotation speed of 3000 rpm or more and 4300 rpm or less, is used to operate a relatively high-output working unit 4. This makes it possible to operate a relatively high-output working unit 4 by using the versatile small first battery pack BP1 and second battery pack BP2 in the motor unit 10.

[0251] In addition, the volume of the main body housing 12 is 9000 cm 3 The following is the result.

[0252] Generally, the higher the maximum output value of the motor 86, the larger the motor 86. Accordingly, the main body housing 12 also becomes larger. With the above configuration, the main body housing 12 can be made smaller in the motor unit 10 that operates the working unit 4 with a relatively high output. This allows the motor unit 10 to be made smaller.

[0253] The volume of the first battery pack BP1 and the volume of the second battery pack BP2 are each 1500 cm 3 The following is the result.

[0254] According to the above configuration, the motor unit 10 can be made smaller.

[0255] Furthermore, when the motor unit 10 is placed on the placement surface P1, the upper wall 20c is disposed above the motor 86.

[0256] The motor 86 is a heavy component. The weight of the motor 86 is greater than the weight of the first battery pack BP1 and the weight of the second battery pack BP2. According to the above configuration, the heavy motor 86 can be disposed at a position closer to the placement surface P1 than the first battery pack BP1 and the second battery pack BP2.

[0257] Furthermore, a first battery pack BP1 is attached to the first battery attachment portion 22 so as to be slidable in the front-rear direction (an example of a first direction) along the upper wall 20c. A second battery pack BP2 is attached to the second battery attachment portion 24 so as to be slidable in the front-rear direction. The motor 86 extends in the front-rear direction and includes a motor shaft 140 fixed to the working unit 4.

[0258] According to the above configuration, based on the attitude of motor shaft 140, the direction in which the first battery pack BP1 and the direction in which the second battery pack BP2 are slid can be easily grasped.

[0259] In addition, the motor unit 10 further includes a first fixing portion 148 (an example of a fixing portion) that is fixed to the working unit 4. The motor 86 is disposed between the first fixing portion 148 and the first battery attachment portion 22, and between the first fixing portion 148 and the second battery attachment portion 24.

[0260] According to the above configuration, interference between the first battery pack BP1 and the second battery pack BP2 and the working unit 4 can be suppressed.

[0261] Further, the first battery pack BP1 attached to the first battery attachment portion 22 and the second battery pack BP2 attached to the second battery attachment portion 24 are electrically connected in series.

[0262] According to the above configuration, the output of the motor unit 10 can be increased, compared to a configuration in which the first battery pack BP1 and the second battery pack BP2 are electrically connected in parallel.

[0263] The motor unit 10 of this embodiment is detachably attached to each of the multiple types of working units 4 and operates the working units 4. The motor unit 10 includes a main housing 12 including a storage section 20 having an upper wall 20c (an example of a first wall), a first battery mounting section 22 arranged on the upper wall 20c, and a second battery mounting section 24 arranged on the upper wall 20c, a motor 86 arranged inside the storage section 20 and operating the working unit 4, and a fixing unit 90 including a first fixing section 148 and a second fixing section 150. A first battery pack BP1 (an example of a first battery) that supplies power to the motor 86 is attached to the first battery mounting section 22. A second battery pack BP2 (an example of a second battery) that supplies power to the motor 86 is attached to the second battery mounting section 24. The multiple types of working units 4 include a plate compactor 4b (an example of a first working unit) and a rammer 4a (an example of a second working unit) different from the plate compactor 4b. The first fixed portion 148 is fixed to the plate compactor 4b. The second fixed portion 150 is fixed to the rammer 4a.

[0264] The first battery pack BP1 and the second battery pack BP2 are small batteries with high versatility. According to the above configuration, the first battery pack BP1 is attached to the first battery attachment portion 22, and the second battery pack BP2 is attached to the second battery attachment portion 24. This allows the first battery pack BP1 and the second battery pack BP2, which are small and highly versatile, to be used in the motor unit 10. In addition, the motor unit 10 is fixed to the plate compactor 4b via the first fixing portion 148, and is fixed to the ramma 4a via the second fixing portion 150. This allows the number of types of working units 4 that can use the motor unit 10 to be increased.

[0265] Furthermore, when the motor unit 10 is placed on the mounting surface P1, the first fixing portion 148 is placed on the mounting surface P1. The motor 86 is disposed between the first fixing portion 148 and the first battery attachment portion 22, and between the first fixing portion 148 and the second battery attachment portion 24.

[0266] According to the above configuration, it is possible to prevent the first battery pack BP1 and the second battery pack BP2 from interfering with the plate compactor 4b.

[0267] The motor unit 10 further includes a motor housing 84 that accommodates the motor 86. The second fixing portion 150 is formed in the motor housing 84.

[0268] According to the above configuration, the number of parts of the motor unit 10 can be reduced compared to a configuration in which the second fixing portion 150 is not formed on the motor housing 84.

[0269] The first fixing portion 148 has a first fixing surface 148a that is fixed to the plate compactor 4b. The second fixing portion 150 has a second fixing surface 150a that is fixed to the rammer 4a. The second fixing surface 150a is substantially perpendicular to the first fixing surface 148a.

[0270] According to the above configuration, the first fixing part 148 or the second fixing part 150 is selected depending on the shape, etc., of the working unit 4. This makes it possible to increase the types of working units 4 that can use the motor unit 10.

[0271] The motor unit 10 is further provided with a fan 88 that is disposed inside the housing portion 20 and rotates by the operation of the motor 86. An air intake 26a (an example of a first air hole) is formed between the housing portion 20 and the second fixed portion 150. An air exhaust 124 (an example of a second air hole) is formed in the second fixed portion 150. When the fan 88 rotates, air flows into the housing portion 20 from one of the air intake 26a and the air exhaust 124, and flows out of the housing portion 20 from the other of the air intake 26a and the air exhaust 124.

[0272] According to the above configuration, the motor 86 disposed inside the housing portion 20 can be cooled.

[0273] Furthermore, the rated capacity of the first battery pack BP1 is different from the rated capacity of the second battery pack BP2.

[0274] According to the above configuration, a plurality of types of battery packs BP can be used in the motor unit 10.

[0275] The working machine 2 of this embodiment includes a rammer 4a and a motor unit 10 that is detachably attached to the rammer 4a and operates the rammer 4a. The motor unit 10 includes a main body housing 12 that includes a storage section 20, a first battery mounting section 22 arranged in the storage section 20, and a second battery mounting section 24 arranged in the storage section 20, and a DC motor 86 that is arranged inside the storage section 20 and operates the rammer 4a. A first battery pack BP1 (an example of a first battery) that supplies power to the DC motor 86 is attached to the first battery mounting section 22. A second battery pack BP2 (an example of a second battery) that supplies power to the DC motor 86 is attached to the second battery mounting section 24.

[0276] The first battery pack BP1 and the second battery pack BP2 are small batteries with high versatility. According to the above configuration, the first battery pack BP1 is attached to the first battery mounting portion 22, and the second battery pack BP2 is attached to the second battery mounting portion 24. This allows the first battery pack BP1 and the second battery pack BP2, which are small and highly versatile, to be used in the motor unit 10 to operate the ramper 4a.

[0277] (Second Example) In the second embodiment, differences from the first embodiment will be described. As shown in Fig. 34, in the second embodiment, the first battery mounting portion 22 and the second battery mounting portion 24 are disposed on the rear wall 20d of the storage portion 20. The first battery mounting portion 22 and the second battery mounting portion 24 are disposed side by side in the left-right direction. When the motor unit 10 is viewed in the front-rear direction, the first battery mounting portion 22 does not overlap with the second battery mounting portion 24.

[0278] The first battery pack BP1 is attached to the first battery mounting portion 22 by sliding it in an attachment direction D1, and is removed from the first battery mounting portion 22 by sliding it in a removal direction D2 opposite to the attachment direction D1. The attachment direction D1 is a downward direction. The removal direction D2 is an upward direction. The second battery pack BP2 is attached to the second battery mounting portion 24 by sliding it in the first direction, and is removed from the second battery mounting portion 24 by sliding it in the removal direction D2.

[0279] (Third Example) In the third embodiment, differences from the first embodiment will be described. As shown in Fig. 35, in the third embodiment, the first battery mounting portion 22 and the second battery mounting portion 24 are disposed on the left wall 20e of the storage portion 20. The first battery mounting portion 22 and the second battery mounting portion 24 are disposed side by side in the front-rear direction. When the motor unit 10 is viewed in the left-right direction, the first battery mounting portion 22 does not overlap with the second battery mounting portion 24.

[0280] The first battery pack BP1 is attached to the first battery mounting portion 22 by sliding it in an attachment direction D1, and is removed from the first battery mounting portion 22 by sliding it in a removal direction D2 opposite to the attachment direction D1. The attachment direction D1 is a downward direction. The removal direction D2 is an upward direction. The second battery pack BP2 is attached to the second battery mounting portion 24 by sliding it in the first direction, and is removed from the second battery mounting portion 24 by sliding it in the removal direction D2.

[0281] (Fourth Example) In the fourth embodiment, differences from the first embodiment will be described. As shown in Fig. 36, the first right vibration isolating member 170 is disposed above the center of gravity G1 of the motor unit 10 and the central axis 140a of the motor shaft 140. The center of the first right vibration isolating member 170 in the up-down direction is disposed below the upper end 86a of the motor 86. The upper end of the first right vibration isolating member 170 is disposed above the upper end 86a of the motor 86. In the front-rear direction, the position of the center of the first right vibration isolating member 170 is substantially the same as the position of the center of gravity G1 of the motor unit 10.

[0282] The second right vibration isolating member 172 and the third right vibration isolating member 174 are disposed below the center of gravity G1 and central axis 140a of the motor unit 10. The second right vibration isolating member 172 and the third right vibration isolating member 174 are disposed above the lower end 86b of the motor 86. In the front-rear direction, the center position of the second right vibration isolating member 172 and the third right vibration isolating member 174 is substantially the same as the position of the center of gravity G1 of the motor unit 10.

[0283] The front-rear position of the first left vibration isolating member 176 (see FIG. 21) is approximately the same as the front-rear position of the first right vibration isolating member 170. The up-down position of the first left vibration isolating member 176 is approximately the same as the up-down position of the first right vibration isolating member 170. The front-rear position of the second left vibration isolating member 178 (see FIG. 21) is approximately the same as the front-rear position of the second right vibration isolating member 172. The up-down position of the second left vibration isolating member 178 is approximately the same as the up-down position of the second right vibration isolating member 172. The front-rear position of the third left vibration isolating member 180 (see FIG. 21) is approximately the same as the front-rear position of the third right vibration isolating member 174. The up-down position of the third left vibration isolating member 180 is approximately the same as the up-down position of the third right vibration isolating member 174.

[0284] (Fifth Example) In the fifth embodiment, differences from the first embodiment will be described. As shown in Fig. 37, the vibration-isolating section 94 includes only a first right vibration-isolating member 170 and a first left vibration-isolating member 176. In Fig. 37, the reference numeral 176 is attached to the outer surface of the first right vibration-isolating member 170 to make it easier to understand the position of the first left vibration-isolating member 176. The shape of the first right vibration-isolating member 170 of the fifth embodiment differs from the shape of the first right vibration-isolating member 170 of the first embodiment, and the shape of the first left vibration-isolating member 176 of the fifth embodiment differs from the shape of the first left vibration-isolating member 176 of the first embodiment.

[0285] The first right vibration isolating member 170 has a triangular ring shape. In the front-rear direction, the position of the center CP of the first right vibration isolating member 170 is substantially the same as the position of the center of gravity G1 of the motor unit 10. The center CP of the first right vibration isolating member 170 is disposed above the center of gravity G1 of the motor unit 10 and the central axis 140a of the motor shaft 140. The upper end of the first right vibration isolating member 170 is disposed above the upper end 86a of the motor 86. The lower end of the first right vibration isolating member 170 is disposed below the lower end 86b of the motor 86. At least a portion of the first right vibration isolating member 170 is disposed below the upper end 86a of the motor 86.

[0286] The shape of the first left vibration isolating member 176 is approximately the same as the shape of the first right vibration isolating member 170. The front-to-rear position of the first left vibration isolating member 176 is approximately the same as the front-to-rear position of the first right vibration isolating member 170. The up-to-down position of the first left vibration isolating member 176 is approximately the same as the up-to-down position of the first right vibration isolating member 170.

[0287] (Sixth Example) In the sixth embodiment, only the differences from the first embodiment will be described. As shown in FIG. 4 and FIG. 38, the battery pack BP is a highly versatile battery pack. The battery pack BP can be used not only in the motor unit 10 but also in the power tool 6. As shown in FIG. 38, for example, the battery pack BP can be used in a rebar binding machine that uses a wire W to bind a plurality of rebars R. The battery pack BP can also be used in a power tool 6 other than the rebar binding machine, such as an impact driver, a circular saw, or a driver drill. The battery pack BP is directly attached to the power tool 6. The battery pack BP can also be used in a gardening product. The gardening product is, for example, a brush cutter, a blower, a hedge trimmer, a chain saw, a transport vehicle, a snow blower, or a tiller. The battery pack BP is directly attached to the gardening product. The battery cells of the battery pack BP may be cylindrical cells, rectangular cells, or laminated cells. In addition, the configuration (e.g., dimensions, shape, maximum voltage value, rated capacity, and type of battery cells) of the first battery pack BP1 shown in FIG. 4 may be different from the configuration (e.g., dimensions, shape, maximum voltage value, rated capacity, and type of battery cells) of the second battery pack BP2.

[0288] 13, when the motor unit 10 is placed on the placement surface P1, the first battery pack BP1 and the second battery pack BP2 (see FIG. 8) are disposed above the motor 86. The first battery pack BP1 and the second battery pack BP2 (see FIG. 8) are substantially parallel to the first fixing portion 148, for example, the first fixing surface 148a.

[0289] 39, the front bracket 110 has a front through-hole 500 and a front rib 502. The front through-hole 500 penetrates the front wall of the front bracket 110 in the front-rear direction. The front through-hole 500 is disposed on the central axis 140a of the motor shaft 140. The motor shaft 140 penetrates through the front through-hole 500.

[0290] The front rib 502 is disposed in the front through-hole 500. The front rib 502 protrudes from the inner circumferential surface of the front through-hole 500 toward the central axis 140a.

[0291] The bearing 144 is attached to the front bracket 110. The bearing 144 is disposed in the front through hole 500. The bearing 144 is disposed rearward of the front end 140b of the motor shaft 140. The front end 140b of the motor shaft 140 is disposed outside the main body housing 12 (see FIG. 13). The front end 140b of the motor shaft 140 is fixed to the shaft receiving portion 324 (see FIG. 27) of the rammer 4a and the first pulley 370 (see FIG. 31) of the plate compactor 4b. Since the motor shaft 140 is substantially parallel to the first fixing portion 148, for example, the first fixing surface 148a (see FIG. 13), the front end 140b of the motor shaft 140 is substantially parallel to the first fixing portion 148, for example, the first fixing surface 148a. The bearing 144 abuts against the rear end of the front rib 502 from the motor accommodating space 122 side. For this reason, the bearing 144 is disposed in the motor accommodating space 122, i.e., inside the motor housing 84. Moreover, the bearing 144 does not pass through the front through-hole 500 and slip out to the outside of the motor accommodating space 122. The bearing 144 rotatably supports the motor shaft 140. The outer diameter of the bearing 144 is, for example, not less than 50 mm and not more than 60 mm. Moreover, the inner diameter of the bearing 144 is, for example, not less than 20 mm and not more than 25 mm. The length of the bearing 144 in the front-rear direction is, for example, not less than 10 mm and not more than 20 mm.

[0292] The partition wall portion 116 of the motor housing body 108 has a rear through-hole 506, a rear rib 508, and an air hole 510 (see FIG. 40). The rear through-hole 506 penetrates the partition wall portion 116 in the front-rear direction. The rear through-hole 506 is disposed on the central axis 140a. The motor shaft 140 penetrates the rear through-hole 506.

[0293] The rear rib 508 is disposed in the rear through hole 506. The rear rib 508 protrudes from the inner peripheral surface of the rear through hole 506 toward the central axis 140a. The rear rib 508 is separated from the front rib 502 in the front-rear direction. A distance L10 between the front end of the rear rib 508 and the rear end of the front rib 502 is, for example, 115 mm or less. This allows the motor housing 84 to be made compact. The distance L10 may be 110 mm or less, 105 mm or less, or 100 mm or less. In addition, the distance L10 is, for example, 80 mm or more. This allows the reduction in the maximum output value of the motor 86 due to the reduction in size of the motor 86 to be suppressed. The distance L10 may be 85 mm or more, 90 mm or more, or 95 mm or more.

[0294] The bearing 142 is attached to the partition wall 116. The bearing 142 is disposed in the rear through-hole 506. The bearing 142 is disposed rearward of the bearing 144. Therefore, the bearing 144 is disposed between the front end 140b of the motor shaft 140 and the bearing 142. The bearing 142 is aligned with the bearing 144 in the front-rear direction. In the front-rear direction, the stator body 132, the coil 134, the outer rotor body 136, and the permanent magnet 138 of the motor 86 are disposed between the bearing 142 and the bearing 144. The bearing 142 abuts against the front end of the rear rib 508 from the motor accommodating space 122 side. Therefore, the bearing 142 is disposed in the motor accommodating space 122, that is, inside the motor housing 84. Moreover, the bearing 142 does not pass through the rear through-hole 506 to the outside of the motor accommodating space 122. The bearing 142 rotatably supports the motor shaft 140. The outer diameter of bearing 142 is, for example, not less than 30 mm and not more than 45 mm. The outer diameter of bearing 142 is smaller than the outer diameter of bearing 144. The inner diameter of bearing 142 is, for example, not less than 15 mm and not more than 20 mm. The inner diameter of bearing 142 is smaller than the inner diameter of bearing 144. The length of bearing 142 in the front-to-rear direction is, for example, not less than 5 mm and not more than 15 mm. The length of bearing 142 in the front-to-rear direction is smaller than the length of bearing 144 in the front-to-rear direction.

[0295] The distance L11 between the front end of the bearing 144 and the rear end of the bearing 142 is, for example, 115 mm or less. This allows the motor housing 84 to be made compact. The distance L11 may be 110 mm or less, 105 mm or less, or 100 mm or less. The distance L11 is, for example, 80 mm or more. This allows the motor 86 to be prevented from decreasing in the maximum output value due to the miniaturization of the motor 86. The distance L11 may be 85 mm or more, 90 mm or more, or 95 mm or more. The distance L11 is approximately the same as the distance L10.

[0296] A distance L12 between the rear end of the bearing 144 and the front end of the bearing 142 is, for example, 100 mm or less. This allows the motor housing 84 to be made compact. The distance L12 may be 90 mm or less, 85 mm or less, or 80 mm or less. The distance L12 is, for example, 60 mm or more. This allows the reduction in the maximum output value of the motor 86 due to the reduction in the size of the motor 86 to be suppressed. The distance L11 may be 65 mm or more, 70 mm or more, or 75 mm or more. The distance L12 is the separation distance between the bearing 142 and the bearing 144.

[0297] 40, the air hole 510 penetrates the partition portion 116 in the front-rear direction. The air hole 510 is farther from the central axis 140a than the rear through-hole 506. The air hole 510 communicates between the motor accommodating space 122 and the fan accommodating space 126.

[0298] As shown in FIG. 39, in this embodiment, the motor unit 10 includes only one fan 88. The fan 88 is disposed in the fan accommodating space 126. The fan 88 is disposed outside the motor accommodating space 122. The fan 88 is fixed to the rear end of the motor shaft 140. When the motor shaft 140 rotates, the fan 88 rotates. As shown in FIG. 15, air passes through the intake port 26a and flows from the outside of the motor unit 10 into the accommodation space 18 of the main body housing 12. Next, as shown in FIG. 26, the air passes through the intake port 202 of the board housing 192 and flows into the internal space 200 in the board housing 192. Next, the air flows along the heat dissipation fins 204, and then passes through the air passage 208 of the cylindrical vibration-proof member 104 and the motor intake port 128 of the rear bracket 112, and flows from the internal space 200 into the fan accommodating space 126. The air flows along the heat dissipation fins 204, thereby cooling the control circuit board 196. As shown in FIG. 40, the air is sent by the fan 88 in a direction away from the central axis 140a (toward the radial outside of the fan 88). Next, the air flows from the fan accommodating space 126 into the motor accommodating space 122 through the air holes 510. Next, the air flows forward through the inside and outside of the motor 86. This cools the motor 86. Finally, the air passes through the exhaust port 124 (see FIG. 15) of the front bracket 110 and is discharged from the motor accommodating space 122 to the outside of the motor unit 10. In this embodiment, the air sent out by the fan 88 is discharged to the outside of the motor unit 10 without passing through the outside of the motor housing 84. For this reason, no fins for guiding the air are formed on the outer surface of the motor housing 84.

[0299] As shown in FIG. 41, the stator body 132 of the motor 86 is surrounded by the outer rotor body 136. The diameter DR1 of the stator body 132 is, for example, 125 mm or less. This prevents the motor 86 from becoming larger. The diameter DR1 may be 120 mm or less. Also, the diameter DR1 is, for example, 110 mm or more. This prevents a decrease in the maximum output value of the motor 86 due to the miniaturization of the motor 86. The diameter DR1 may be 115 mm or more. As shown in FIG. 39, the length L13 in the front-rear direction of the stator body 132 is, for example, 23 mm or less. This prevents the motor 86 from becoming larger. The length L13 may be 20 mm or less. Also, the length L13 is, for example, 13 mm or more. This prevents a decrease in the maximum output value of the motor 86 due to the miniaturization of the motor 86. The length L13 may be 15 mm or more.

[0300] The diameter DR2 of the outer rotor body 136 is, for example, 148 mm or less. This prevents the motor 86 from becoming larger. The diameter DR2 may be 145 mm or less. Also, the diameter DR2 may be, for example, 138 mm or more. This prevents a decrease in the maximum output value of the motor 86 that would otherwise be caused by a reduction in the size of the motor 86. The diameter DR2 may be 140 mm or more. The diameter DR2 is larger than the diameter DR1.

[0301] 41, the stator body 132 has a plurality of (24 in this embodiment) teeth 514. A coil 134 is wound around each tooth 514. The 24 teeth 514 are arranged at equal intervals around the central axis 140a.

[0302] The permanent magnets 138 are fixed to the outer rotor body 136, and are arranged to surround the stator body 132. The permanent magnets 138 are arranged between the outer rotor body 136 and the teeth 514. In this embodiment, the number of the permanent magnets 138 is 28. The number of the permanent magnets 138 is equal to or greater than the number of the teeth 514. Moreover, the number of the permanent magnets 138 is equal to or less than 1.5 times the number of the teeth 514.

[0303] The residual magnetic flux density Br of the permanent magnet 138 is, for example, 1.32 T or more. This makes it possible to strengthen the magnetic force generated by the permanent magnet 138. The residual magnetic flux density Br may be 1.40 T or more, or may be 1.50 T or more. Moreover, the residual magnetic flux density Br is, for example, 1.8 T or less. The residual magnetic flux density Br may be 1.7 T or less, or may be 1.6 T or less.

[0304] The coercive force bHc of the permanent magnet 138 is, for example, 971 kA / m or more. This makes it possible to strengthen the magnetic force generated by the permanent magnet 138. The coercive force bHc may be 1000 kA / m or more, or may be 1050 kA / m or more. Moreover, the coercive force bHc is, for example, 1200 kA / m or less. The coercive force bHc may be 1150 kA / m or less, or may be 1100 kA / m or less.

[0305] In this embodiment, the permanent magnet 138 is, for example, a neodymium magnet. The magnetic force of the permanent magnet 138 is greater than the magnetic force of a samarium-cobalt magnet, a ferrite magnet, and a praseodymium magnet.

[0306] In this embodiment, the maximum output value of the motor 86 is, for example, 1.80 kW or more. The maximum output value of the motor 86 may be 2.0 kW or more. The maximum output value of the motor 86 may be, for example, 4.0 kW or less. The maximum output value of the motor 86 may be 3.0 kW or less, or 2.35 kW or less.

[0307] As shown in FIG. 39, the motor unit 10 further includes a sensor board 520. The sensor board 520 includes a plurality of Hall elements (not shown). The Hall elements detect the magnetic force from the permanent magnet 138, and the sensor board 520 detects the rotation of the motor 86. The sensor board 520 is disposed in the motor accommodating space 122. In the front-rear direction, the sensor board 520 is disposed between the bearing 144 and the bearing 142. As shown in FIG. 42, the sensor board 520 faces the permanent magnet 138 in the front-rear direction. The sensor board 520 is disposed rearward of the outer rotor body 136 and the permanent magnet 138. The sensor board 520 is fixed to the motor housing body 108 by a screw 522. The sensor board 520 is disposed rearward of the front bracket 110.

[0308] As shown in FIG. 7, the main power switch 74, the display panel 76, the operation switch 78a, and the rotation speed change switch 78b are arranged on the upper wall 20c of the storage section 20 of the main housing 12. The main power switch 74 accepts a user's operation to switch the motor unit 10 between the on state and the off state. The display panel 76 is turned on when the motor unit 10 is in the on state, and is turned off when the motor unit 10 is in the off state. The display panel 76 corresponds to an indicator light. The operation switch 78a accepts a user's operation to operate the motor 86. The rotation speed change switch 78b accepts a user's operation to change the rotation speed of the motor shaft 140. As shown in FIG. 43, the main power switch 74, the display panel 76, and the rotation speed change switch 78b are arranged on a switch board 524.

[0309] As shown in FIG. 44, the motor unit 10 includes a plurality of first switch signal lines 530, a plurality of first switch connecting signal lines 532, a first switch connecting terminal 534, a plurality of second switch wires 536, a plurality of second switch connecting wires 538, and a second switch connecting terminal 540.

[0310] The first switch signal lines 530 are connected to the operation switch 78a and extend from the operation switch 78a. The first switch signal lines 530 are disposed above the control circuit board 196. The first switch connecting signal lines 532 are connected to the mounting surface 196a of the control circuit board 196 and extend from the mounting surface 196a of the control circuit board 196. The mounting surface 196a is substantially perpendicular to the front-rear direction, and faces the front direction. An electronic component 542 is mounted on the mounting surface 196a. The electronic component 542 is, for example, a capacitor, a resistor, or an inductor. The first switch connecting terminal 534 is disposed above the control circuit board 196. The first switch connecting terminal 534 connects the first switch signal lines 530 and the first switch connecting signal lines 532. As a result, when the operation switch 78 a is operated by a user, a signal is sent from the operation switch 78 a to the control circuit board 196 via the first switch signal line 530 , the first switch connecting terminal 534 , and the first switch connecting signal line 532 .

[0311] As shown in FIG. 45, the main body housing 12 has therein a terminal accommodating space 544 disposed above the control unit 102. The first switch signal lines 530 and the first switch connecting terminals 534 are disposed in the terminal accommodating space 544. The first switch signal lines 530 and the first switch connecting terminals 534 are disposed above the control unit 102. The terminal accommodating space 544 is disposed between the upper wall 20c of the accommodating portion 20 of the main body housing 12 and the control unit 102. The terminal accommodating space 544 is disposed rearward of the motor housing 84 and the cylindrical vibration-proof member 104. Therefore, the first switch connecting terminals 534 are disposed rearward of the fan 88 (see FIG. 34), the bearing 142 (see FIG. 34), and the stator main body 132 (see FIG. 34). In the left-right direction, the first switch connection terminal 534 is disposed to the right of the first left vibration isolating member 176 (see FIG. 19), the second left vibration isolating member 178 (see FIG. 19), and the third left vibration isolating member 180, and to the left of the first right vibration isolating member 170 (see FIG. 18), the second right vibration isolating member 172 (see FIG. 18), and the third right vibration isolating member 174 (see FIG. 49). In the left-right direction, the first switch connection terminal 534 is disposed between the right end and the left end of the motor 86 (see FIG. 41). Therefore, in the left-right direction, the first switch connection terminal 534 is disposed between the right end of the first battery pack BP1 (see FIG. 4) and the left end of the second battery pack BP2 (see FIG. 4), and is disposed between the right wall 154a and the left wall 154b of the plate member 92 (see FIG. 17). In the left-right direction, the first switch connecting terminal 534 is disposed between the right end and the left end of the control circuit board 196.

[0312] 46, the outer housing portion 198 of the control unit 102 has a first wire opening 548 that communicates between the internal space 200 and the outside of the outer housing portion 198, and the first wire opening 548 is disposed in an upper portion of the outer housing portion 198. A plurality of first switch connecting signal wires 532 pass through the first wire opening 548.

[0313] As shown in FIG. 44, the second switch wires 536 are connected to the switch board 524. The second switch wires 536 extend from the main power switch 74 (see FIG. 43), the display panel 76 (see FIG. 43), and the rotation speed change switch 78b (see FIG. 43) via the switch board 524. Some of the second switch wires 536 are power lines, and the remaining second switch wires 536 are signal lines. The second switch wires 536 are disposed above the control circuit board 196. The second switch connecting wires 538 are connected to the mounting surface 196a of the control circuit board 196 and extend from the mounting surface 196a of the control circuit board 196. Some of the second switch connecting wires 538 are power lines, and the remaining second switch connecting wires 538 are signal lines. The second switch connecting terminal 540 is disposed above the control circuit board 196. The second switch connecting terminal 540 connects the plurality of second switch electric wires 536 and the plurality of second switch connecting electric wires 538. As a result, when the main power switch 74 and the rotation speed change switch 78b are operated by the user, a signal is sent from the switch board 524 to the control circuit board 196 via the second switch electric wires 536, the second switch connecting terminal 540, and the second switch connecting electric wires 538. In addition, a signal is sent from the control circuit board 196 to the switch board 524 via the second switch connecting electric wires 538, the second switch connecting terminal 540, and the second switch electric wires 536, and the display panel 76 is turned on or off.

[0314] As shown in FIG. 45, the second switch electric wires 536 and the second switch connecting terminals 540 are disposed in the terminal accommodating space 544. Therefore, the second switch connecting terminals 540 are disposed rearward of the fan 88 (see FIG. 34), the bearing 142 (see FIG. 34), and the stator body 132 (see FIG. 34). The second switch electric wires 536 and the second switch connecting terminals 540 are disposed above the control unit 102. In the left-right direction, the second switch connecting terminals 540 are disposed to the right of the first left vibration isolating member 176 (see FIG. 19), the second left vibration isolating member 178 (see FIG. 19), and the third left vibration isolating member 180 (see FIG. 45), and to the left of the first right vibration isolating member 170 (see FIG. 18), the second right vibration isolating member 172 (see FIG. 18), and the third right vibration isolating member 174 (see FIG. 49). In the left-right direction, the second switch connection terminal 540 is disposed between the right end and the left end of the motor 86 (see FIG. 41). Therefore, in the left-right direction, the second switch connection terminal 540 is disposed between the right end of the first battery pack BP1 (see FIG. 4) and the left end of the second battery pack BP2 (see FIG. 4), and is disposed between the right wall 154a and the left wall 154b of the plate member 92 (see FIG. 17). In the left-right direction, the second switch connection terminal 540 is disposed between the right end and the left end of the control circuit board 196. As shown in FIG. 46, the second switch connection wires 538 pass through the first wire opening 548.

[0315] As shown in Figures 47 and 48, the motor unit 10 includes a plurality of motor power lines 560, a plurality of motor connecting power lines 562, a plurality of first motor connecting terminals 564, a plurality of motor signal lines 566, a plurality of motor connecting signal lines 568, and a second motor connecting terminal 570.

[0316] 40, the motor housing main body 108 is provided with a communication pipe portion 574 that communicates between the motor accommodating space 122 and the outside of the motor housing 84, and the communication pipe portion 574 extends rearward from the cylindrical portion 114. The multiple motor power supply wires 560 pass through the communication pipe portion 574. Although not shown, the multiple motor power supply wires 560 are connected to the coil 134. The multiple motor power supply wires 560 extend from the coil 134, pass through the communication pipe portion 574, and then extend rearward.

[0317] As shown in FIGS. 47 and 48, motor-connecting power supply wire 562 is connected to mounting surface 196a of control circuit board 196 and extends from mounting surface 196a of control circuit board 196.

[0318] The multiple first motor connecting terminals 564 are disposed above the control circuit board 196. Note that in Figures 46, 48, and 49, the first motor connecting terminals 564 are illustrated by dashed lines. The first motor connecting terminals 564 connect the motor power line 560 and the motor connecting power line 562. As a result, power for operating the motor 86 is supplied to the motor 86 from the control circuit board 196 via the motor power line 560, the first motor connecting terminals 564, and the motor connecting power line 562.

[0319] 47 and 49, the multiple motor power lines 560 and the multiple first motor connecting terminals 564 are disposed above the control unit 102. The multiple first motor connecting terminals 564 are disposed in the terminal accommodating space 544. Therefore, the first motor connecting terminals 564 are disposed rearward of the fan 88 (see FIG. 34), the bearing 142 (see FIG. 34), and the stator body 132 (see FIG. 34). Furthermore, at least a portion of the first motor connecting terminals 564 is disposed forward of the control circuit board 196 in the front-rear direction. In the left-right direction, the first motor connection terminal 564 is disposed to the right of the first left vibration isolating member 176 (see FIG. 19), the second left vibration isolating member 178 (see FIG. 19), and the third left vibration isolating member 180 (see FIG. 45), and to the left of the first right vibration isolating member 170 (see FIG. 18), the second right vibration isolating member 172 (see FIG. 18), and the third right vibration isolating member 174. In the left-right direction, the first motor connection terminal 564 is disposed between the right end and the left end of the motor 86 (see FIG. 41). Therefore, in the left-right direction, the first motor connection terminal 564 is disposed between the right end of the first battery pack BP1 (see FIG. 4) and the left end of the second battery pack BP2 (see FIG. 4), and is disposed between the right wall 154a and the left wall 154b of the plate member 92 (see FIG. 17). In the left-right direction, the first motor connecting terminal 564 is disposed between the right end and the left end of the control circuit board 196.

[0320] 46, the outer housing portion 198 has a second wire opening 578 that communicates between the internal space 200 and the outside of the outer housing portion 198, and the second wire opening 578 is disposed in an upper portion of the outer housing portion 198. A plurality of motor connecting power wires 562 pass through the second wire opening 578.

[0321] 40, the multiple motor signal wires 566 pass through the communicating pipe portion 574. The multiple motor signal wires 566 are connected to the sensor board 520. The multiple motor signal wires 566 extend from the sensor board 520, pass through the communicating pipe portion 574, and then extend in the rear direction.

[0322] As shown in FIGS. 47 and 48, a plurality of motor connecting signal wires 568 are connected to the mounting surface 196a of the control circuit board 196 and extend from the mounting surface 196a of the control circuit board 196.

[0323] The second motor connecting terminal 570 is disposed above the control circuit board 196. The second motor connecting terminal 570 connects the multiple motor signal lines 566 and the multiple motor connecting signal lines 568. As a result, a signal detected by the sensor board 520 (see FIG. 40) is sent from the sensor board 520 to the control circuit board 196 via the motor signal lines 566, the second motor connecting terminal 570, and the motor connecting signal lines 568. As a result, the control circuit board 196 detects the rotation of the motor 86.

[0324] As shown in Figs. 47 and 49, the motor signal lines 566 and the second motor connecting terminal 570 are disposed above the control unit 102. The second motor connecting terminal 570 is disposed in the terminal accommodating space 544. Therefore, the second motor connecting terminal 570 is disposed rearward of the fan 88 (see Fig. 34), the bearing 142 (see Fig. 34), and the stator body 132 (see Fig. 34). In terms of the left-right direction, the second motor connecting terminal 570 is disposed to the right of the first left vibration isolating member 176 (see Fig. 19), the second left vibration isolating member 178 (see Fig. 19), and the third left vibration isolating member 180 (see Fig. 45), and to the left of the first right vibration isolating member 170 (see Fig. 18), the second right vibration isolating member 172 (see Fig. 18), and the third right vibration isolating member 174. In the left-right direction, the second motor connection terminal 570 is disposed between the right end and the left end of the motor 86 (see FIG. 41). Therefore, in the left-right direction, the second motor connection terminal 570 is disposed between the right end of the first battery pack BP1 (see FIG. 4) and the left end of the second battery pack BP2 (see FIG. 4), and is disposed between the right wall 154a and the left wall 154b of the plate member 92 (see FIG. 17). In the left-right direction, the second motor connection terminal 570 is disposed between the right end and the left end of the control circuit board 196. As shown in FIG. 46, the multiple motor connection signal wires 568 pass through the second wire opening 578.

[0325] As shown in FIG. 50, the motor unit 10 includes a plurality of first battery power lines 590, a plurality of first battery signal lines 592, a plurality of first battery connecting signal lines 594, a first battery connecting terminal 596, a plurality of second battery power lines 598, a plurality of second battery signal lines 600, a plurality of second battery connecting signal lines 602, and a second battery connecting terminal 604.

[0326] The multiple first battery power lines 590 are connected to the first battery terminal 70 and the mounting surface 196a (see FIG. 48) of the control circuit board 196. The multiple first battery power lines 590 extend from the first battery terminal 70 to the mounting surface 196a of the control circuit board 196. This allows power from the first battery pack BP1 (see FIG. 4) to be supplied from the first battery terminal 70 to the control circuit board 196 via the first battery power lines 590. As shown in FIG. 51, the first battery power lines 590 pass between the first battery terminal 70 and the support plate 184. As shown in FIG. 46, the first battery power lines 590 pass through the second wire opening 578.

[0327] As shown in FIG. 50, a plurality of first battery signal lines 592 are connected to the first battery terminal 70 and extend from the first battery terminal 70.

[0328] The multiple first battery connecting signal wires 594 are connected to the mounting surface 196a (see FIG. 48) of the control circuit board 196 and extend from the mounting surface 196a of the control circuit board 196. As shown in FIG. 46, the multiple first battery connecting signal wires 594 pass through the second wire opening 578.

[0329] As shown in FIG. 50, the first battery connection terminal 596 connects a plurality of first battery signal lines 592 and a plurality of first battery connection signal lines 594. Thus, a signal is sent from the first battery pack BP1 to the control circuit board 196 and from the control circuit board 196 to the first battery pack BP1 via the first battery terminal 70, the first battery signal line 592, the first battery connection terminal 596, and the first battery connection signal line 594. In the up-down direction, the first battery connection terminal 596 is disposed above the control unit 102. As shown in FIG. 51, the first battery connection terminal 596 is disposed between the first battery terminal 70 and the support plate 184. In the left-right direction, the first battery connection terminal 596 is disposed between the right end and the left end of the motor 86 (see FIG. 41).

[0330] As shown in FIG. 50, the plurality of second battery power supply wires 598 are connected to the second battery terminal 72 and the control circuit board 196. The plurality of second battery power supply wires 598 extend from the second battery terminal 72 to the control circuit board 196. This allows power from the second battery pack BP2 (see FIG. 4) to be supplied from the second battery terminal 72 to the control circuit board 196 via the second battery power supply wires 598. As shown in FIG. 51, the second battery power supply wires 598 pass between the second battery terminal 72 and the support plate 184. As shown in FIG. 46, the second battery power supply wires 598 pass through the first wire opening 548.

[0331] As shown in FIG. 50, a plurality of second battery signal lines 600 are connected to the second battery terminal 72 and extend from the second battery terminal 72.

[0332] The multiple second battery connecting signal wires 602 are connected to the mounting surface 196a (see FIG. 48) of the control circuit board 196 and extend from the mounting surface 196a of the control circuit board 196. As shown in FIG. 46, the multiple second battery connecting signal wires 602 pass through the first wire opening 548.

[0333] As shown in FIG. 50, the second battery connection terminal 604 connects the plurality of second battery signal lines 600 and the plurality of second battery connection signal lines 602. As a result, a signal is sent from the second battery pack BP2 to the control circuit board 196 and from the control circuit board 196 to the second battery pack BP2 via the second battery terminal 72, the second battery signal line 600, the second battery connection terminal 604, and the second battery connection signal line 602. In the vertical direction, the second battery connection terminal 604 is disposed above the control unit 102. The second battery connection terminal 604 is aligned with the first battery connection terminal 596 in the left-right direction. As shown in FIG. 51, the second battery connection terminal 604 is disposed between the second battery terminal 72 and the support plate 184. In the left-right direction, the second battery connection terminal 604 is disposed between the right end and the left end of the motor 86 (see FIG. 41).

[0334] (effect) The motor unit 10 of this embodiment is detachably attached to each of the plate compactor 4b (an example of a first working unit) and the rammer 4a (an example of a second working unit), and operates the plate compactor 4b and the rammer 4a. The motor unit 10 includes a motor 86 having a motor shaft 140 and a maximum output value of 1.8 kW or more, a motor housing 84 supporting the motor 86, a first battery mounting portion 22 (an example of a battery mounting portion) to which a battery pack BP is detachably attached, a main body housing 12 accommodating the motor housing 84, and a bearing 144 (an example of a first bearing) and a bearing 142 (an example of a second bearing) attached to the motor housing 84 and rotatably supporting the motor shaft 140. The bearing 142 is disposed rearward of the bearing 144. A distance L11 between the front end of the bearing 144 and the rear end of the bearing 142 is 115 mm or less.

[0335] According to the above configuration, compared to a configuration in which the distance L11 between the front end of the bearing 144 and the rear end of the bearing 142 exceeds 115 mm, it is possible to prevent the motor unit 10 from becoming large.

[0336] Furthermore, the bearing 144 and the bearing 142 are disposed inside the motor housing 84 .

[0337] According to the above configuration, it is possible to prevent the user from touching the bearing 144 and the bearing 142 .

[0338] The motor housing 84 also includes a front bracket 110 (an example of a first member) to which the bearing 144 is attached, and a motor housing main body 108 (an example of a second member) to which the bearing 142 is attached, which defines a motor accommodating space 122 (an example of an accommodating space) between the front bracket 110 and the motor accommodating space 122 to accommodate the motor 86.

[0339] According to the above-described configuration, the configuration of the motor housing 84 can be prevented from becoming complicated, as compared with a configuration in which the bearing 144 and the bearing 142 are attached to the same member.

[0340] The motor unit 10 further includes a fan 88 that is fixed to the motor shaft 140 and disposed only outside the motor accommodating space 122. The motor housing 84 has an air hole 510. Air flows into the motor accommodating space 122 from the air hole 510 as the fan 88 rotates.

[0341] According to the above configuration, compared to a configuration in which the fan 88 is disposed in the motor accommodating space 122, an increase in size of the motor housing 84 can be suppressed.

[0342] The motor unit 10 further includes a control unit 102 that operates the motor 86. Air flows from the control unit 102 toward the air holes 510 as the fan 88 rotates.

[0343] According to the above configuration, the air passes through the control unit 102 and the air hole 510, and then passes through the motor 86. This allows both the control unit 102 and the motor 86 to be cooled by a single air flow.

[0344] Furthermore, when the motor unit 10 is viewed in the direction in which the motor shaft 140 extends, the control unit 102 at least partially overlaps the motor 86 .

[0345] According to the above configuration, when the motor unit 10 is viewed in the direction in which the motor shaft 140 extends, the motor unit 10 is prevented from becoming larger in the direction perpendicular to the direction in which the motor shaft 140 extends, compared to a configuration in which the control unit 102 does not overlap with the motor 86.

[0346] The motor unit 10 is further provided with a sensor board 520 that is disposed in the motor accommodating space 122 and detects the rotation of the motor 86. A front end 140b (an example of a fixed portion) of the motor shaft 140 is fixed to each of the rammer 4a and the plate compactor 4b. The bearing 144 is disposed between the front end 140b of the motor shaft 140 and the bearing 142. The sensor board 520 is fixed to the motor housing body 108.

[0347] According to the above configuration, the sensor board 520 can be separated from the rammer 4a and the plate compactor 4b, compared to a configuration in which the sensor board 520 is fixed to the front bracket.

[0348] The motor unit 10 further includes a fixing unit 90 including a first fixing portion 148 fixed to the plate compactor 4b and a second fixing portion 150 fixed to the rammer 4a. When the motor unit 10 is placed on the placement surface P1, the first fixing portion 148 is placed on the placement surface P1. The motor shaft 140 includes a front end portion 140b (an example of a fixing portion) fixed to each of the plate compactor 4b and the rammer 4a. The front end portion 140b of the motor shaft 140 is approximately parallel to the first fixing portion 148.

[0349] According to the above configuration, when the first fixing portion 148 is fixed to the plate compactor 4b, it is possible to easily fix the front end portion 140b of the motor shaft 140 to the plate compactor 4b.

[0350] The motor unit 10 further includes a fixing unit 90 including a first fixing portion 148 fixed to the plate compactor 4b and a second fixing portion 150 fixed to the rammer 4a. When the motor unit 10 is placed on the placement surface P1, the first fixing portion 148 is placed on the placement surface P1. When the first battery pack BP1 (an example of a battery pack) is attached to the first battery mounting portion 22 (an example of a battery mounting portion), the first battery pack BP1 is approximately parallel to the first fixing portion 148 and is disposed above the motor 86.

[0351] The motor 86 is a heavy component. The weight of the motor 86 is greater than the weight of the first battery pack BP1. According to the above configuration, the heavy motor 86 is disposed at a position closer to the mounting surface P1 than the first battery pack BP1. This allows the center of gravity G1 of the motor unit 10 to be closer to the mounting surface P1.

[0352] In addition, the first battery pack BP1 (an example of a battery pack) can be used with the power tool 6.

[0353] According to the above configuration, the motor unit 10 can be operated using the highly versatile first battery pack BP1.

[0354] Moreover, the motor unit 10 further includes an operation switch 78a (an example of a switch) that receives a user's operation to control the motor 86. The operation switch 78a is disposed on the main body housing 12.

[0355] According to the above configuration, compared to a configuration in which the operation switch 78a is disposed on a component other than the main body housing 12, the configuration of the motor unit 10 can be prevented from becoming complicated.

[0356] The motor unit 10 further includes a control unit 102 that operates the motor 86, a first switch signal line 530 (an example of a switch wire) extending from the operation switch 78a, and a first switch connection signal line 532 (an example of a switch connection wire) extending from the control unit 102 and connected to the first switch signal line 530. The first battery mounting portion 22 is disposed on the upper wall 20c (an example of a first wall) of the main body housing 12. A first switch connection terminal 534 (an example of a terminal) that connects the first switch signal line 530 and the first switch connection signal line 532 is disposed in a terminal accommodating space 544 (an example of a space) between the upper wall 20c and the control unit 102.

[0357] According to the above configuration, the first switch connecting terminal 534 connecting the first switch signal line 530 and the first switch connecting signal line 532 is disposed in the terminal accommodating space 544 between the upper wall 20c and the control unit 102, so that the terminal accommodating space 544 between the upper wall 20c and the control unit 102 can be effectively utilized.

[0358] The motor unit 10 further includes a motor signal line 566 (an example of a motor electric wire) extending from the motor 86, and a motor connecting signal line 568 (an example of a motor connecting electric wire) extending from the control unit 102 and connected to the motor signal line 566. A second motor connecting terminal 570 (an example of a terminal) connecting the motor signal line 566 and the motor connecting signal line 568 is disposed in the terminal accommodating space 544 between the upper wall 20c and the control unit 102.

[0359] According to the above configuration, the second motor connecting terminal 570, which connects the motor signal line 566 and the motor connecting signal line 568, is disposed in the terminal accommodating space 544 between the upper wall 20c and the control unit 102, so that the terminal accommodating space 544 between the upper wall 20c and the control unit 102 can be effectively utilized.

[0360] The motor 86 also includes a stator body 132, a coil 134 wound around the stator body 132, an outer rotor body 136 (an example of a rotor body), and a plurality of permanent magnets 138 (an example of magnets) fixed to the outer rotor body 136. The residual magnetic flux density of the permanent magnets 138 is 1.32 T or more. The coercive force of the permanent magnets 138 is 971 kA / m or more.

[0361] According to the above configuration, the permanent magnet 138 can be made smaller than in a configuration in which the residual magnetic flux density of the permanent magnet 138 is less than 1.32 T and / or the coercive force of the permanent magnet 138 is less than 971 kA / m. This allows the motor unit 10 to be made smaller.

[0362] Moreover, the permanent magnet 138 is a neodymium magnet.

[0363] According to the above configuration, since the magnetic force of a neodymium magnet is the strongest among all permanent magnets, it is possible to make the permanent magnet 138 smaller, thereby enabling the motor unit 10 to be made more compact.

[0364] Furthermore, the stator body 132 includes a plurality of teeth 514. The number of the plurality of permanent magnets 138 is equal to or greater than the number of the plurality of teeth 514.

[0365] According to the above configuration, it is possible to suppress the occurrence of cogging when the motor 86 is in operation.

[0366] The motor unit 10 also includes a control unit 102 that operates the motor 86, and a first right vibration-isolating member 170, a second right vibration-isolating member 172, a third right vibration-isolating member 174, a first left vibration-isolating member 176, a second left vibration-isolating member 178, and a third left vibration-isolating member 180 (examples of vibration-isolating members) that are elastically deformable and suppress the transmission of vibrations of the motor 86 from the motor 86 to the first battery mounting portion 22, and the transmission of vibrations of the motor 86 from the motor 86 to the control unit 102.

[0367] According to the above configuration, even if the motor 86 vibrates due to its operation, the battery pack BP and the control unit 102 can be prevented from vibrating.

[0368] The motor unit 10 of this embodiment is detachably attached to each of the plate compactor 4b (an example of a first working unit) and the rammer 4a (an example of a second working unit), and operates the plate compactor 4b and the rammer 4a. The motor unit 10 includes a motor 86 having a motor shaft 140, a motor housing 84 having a motor housing space 122 (an example of a housing space) that houses the motor 86 and has an air hole 510, a main body housing 12 that houses the motor housing 84 and includes a first battery mounting portion 22 (an example of a battery mounting portion) to which a battery pack BP is detachably attached, a fan 88 that is fixed to the motor shaft 140 and is disposed only outside the motor housing space 122, a first fixing portion 148 that is fixed to the plate compactor 4b, and a fixing unit 90 that includes a second fixing portion 150 that is fixed to the rammer 4a. When the fan 88 rotates, air passes through the space inside the main body housing 12 and outside the motor housing 84, the air hole 510, and the motor accommodating space 122 in that order.

[0369] According to the above configuration, since the fan 88 is disposed outside the motor accommodating space 122, it is possible to prevent the motor housing 84 from becoming large. This makes it possible to prevent the motor unit 10 from becoming large.

[0370] The motor unit 10 further includes a control unit 102 that operates the motor 86. Air flows from the control unit 102 toward the air holes 510 as the fan 88 rotates.

[0371] According to the above configuration, the air passes through the control unit 102 and the air hole 510, and then passes through the motor 86. This allows both the control unit 102 and the motor 86 to be cooled by a single air flow.

[0372] Furthermore, when the motor unit 10 is viewed in the direction in which the motor shaft 140 extends, the control unit 102 at least partially overlaps the motor 86 .

[0373] According to the above configuration, when the motor unit 10 is viewed in the direction in which the motor shaft 140 extends, the motor unit 10 is prevented from becoming larger in the direction perpendicular to the direction in which the motor shaft 140 extends, compared to a configuration in which the control unit 102 does not overlap with the motor 86.

[0374] The motor unit 10 of this embodiment is detachably attached to each of the plate compactor 4b (an example of a first working unit) and the rammer 4a (an example of a second working unit), and operates the plate compactor 4b and the rammer 4a. The motor unit 10 includes a motor 86, a motor housing 84 that supports the motor 86, a control unit 102 that operates the motor 86, a first battery mounting portion 22 (an example of a battery mounting portion) to which the battery pack BP is detachably attached, a main body housing 12 that accommodates the motor housing 84 and the control unit 102, a motor signal line 566 (an example of a motor electric wire) extending from the motor 86, and a motor connection signal line 568 (an example of a motor connection electric wire) extending from the control unit 102 and connected to the motor signal line 566. The first battery mounting portion 22 is disposed on the upper wall 20c (an example of a first wall) of the main body housing 12. A second motor connecting terminal 570 (an example of a terminal) that connects the motor signal line 566 and the motor connecting signal line 568 is disposed in a terminal accommodating space 544 (an example of a space) between the upper wall 20c and the control unit 102.

[0375] According to the above configuration, the second motor connecting terminal 570, which connects the motor signal line 566 and the motor connecting signal line 568, is disposed in the terminal accommodating space 544 between the upper wall 20c and the control unit 102, so that the terminal accommodating space 544 between the upper wall 20c and the control unit 102 can be effectively utilized.

[0376] The motor unit 10 further includes an operation switch 78a (an example of a switch) that accepts a user's operation to control the motor 86, a first switch signal line 530 (an example of a switch wire) extending from the operation switch 78a, and a first switch connecting signal line 532 (an example of a switch connecting wire) extending from the control unit 102 and connected to the first switch signal line 530. A first switch connecting terminal 534 (an example of a terminal) that connects the first switch signal line 530 and the first switch connecting signal line 532 is disposed in a terminal accommodating space 544 between the upper wall 20c and the control unit 102.

[0377] According to the above configuration, the first switch connecting terminal 534 connecting the first switch signal line 530 and the first switch connecting signal line 532 is disposed in the terminal accommodating space 544 between the upper wall 20c and the control unit 102, so that the terminal accommodating space 544 between the upper wall 20c and the control unit 102 can be effectively utilized.

[0378] The motor unit 10 of this embodiment is detachably attached to each of the plate compactor 4b (an example of a first working unit) and the rammer 4a (an example of a second working unit), and operates the plate compactor 4b and the rammer 4a. The motor unit 10 includes a motor 86, a motor housing 84 that supports the motor 86, a first battery mounting portion 22 (an example of a battery mounting portion) to which the battery pack BP is detachably attached, a main body housing 12 that accommodates the motor housing 84, and a fixing unit 90 that includes a first fixing portion 148 fixed to the plate compactor 4b and a second fixing portion 150 fixed to the rammer 4a. The motor 86 includes a stator body 132, a coil 134 wound around the stator body 132, an outer rotor body 136 (an example of a rotor body), and a plurality of permanent magnets 138 (an example of a magnet) fixed to the outer rotor body 136. The residual magnetic flux density Br of the permanent magnet 138 is equal to or greater than 1.32 T. The coercive force bHc of the permanent magnet 138 is equal to or greater than 971 kA / m.

[0379] According to the above configuration, the permanent magnet 138 can be made smaller than in a configuration in which the residual magnetic flux density of the permanent magnet 138 is less than 1.32 T and / or the coercive force of the permanent magnet 138 is less than 971 kA / m. This allows the motor unit 10 to be made smaller.

[0380] Moreover, the permanent magnet 138 is a neodymium magnet.

[0381] According to the above configuration, since the magnetic force of a neodymium magnet is the strongest among all permanent magnets, it is possible to make the permanent magnet 138 smaller, thereby enabling the motor unit 10 to be made more compact.

[0382] Furthermore, the stator body 132 includes a plurality of teeth 514. The number of the plurality of permanent magnets 138 is equal to or greater than the number of the plurality of teeth 514.

[0383] According to the above configuration, it is possible to suppress the occurrence of cogging when the motor 86 is in operation.

[0384] (Modification) The motor unit 10 according to one embodiment may include three or more battery attachment portions. In this case, three or more battery packs BP can be attached to the main body housing 12.

[0385] In the motor unit 10 according to one embodiment, the mounting direction D1 of the first battery pack BP1 may be different from the mounting direction of the second battery pack BP2. Also, the removal direction D2 of the first battery pack BP1 may be different from the removal direction of the second battery pack BP2.

[0386] In the motor unit 10 of the above embodiment, the first right vibration isolating member 170, the second right vibration isolating member 172, and the third right vibration isolating member 174 are fixed to the right wall 154a of the plate member 92. In a modified example, the number of vibration isolating members fixed to the right wall 154a of the plate member 92 is not limited to three, and may be two or less, or four or more.

[0387] In the motor unit 10 of the above embodiment, the first left vibration isolating member 176, the second left vibration isolating member 178, and the third left vibration isolating member 180 are fixed to the left wall 154b of the plate member 92. In a modified example, the number of vibration isolating members fixed to the left wall 154b of the plate member 92 is not limited to three, and may be two or less, or four or more.

[0388] In the motor unit 10 according to one embodiment, the permanent magnet 138 may be a permanent magnet other than a neodymium magnet.

[0389] In the motor unit 10 according to one embodiment, the sensor board 520 may be fixed to the front bracket 110.

[0390] In the motor unit 10 according to one embodiment, the motor 86 is not limited to an outer rotor type motor, and may be, for example, an inner rotor type motor.

[0391] The motor unit 10 according to one embodiment may include a speed reduction mechanism. The speed reduction mechanism is disposed between the outer rotor body 136 and the motor shaft 140 of the motor 86. The speed reduction mechanism reduces the rotation of the outer rotor body 136 and transmits it to the motor shaft 140. Therefore, the rotation speed of the motor shaft 140 is smaller than the rotation speed of the outer rotor body 136. The motor shaft 140 is disposed offset from the outer rotor body 136 in a direction perpendicular to the front-rear direction (for example, in the up-down direction and left-right direction). [Explanation of symbols]

[0392] 2: Work equipment 4: Unit of Work 4a: Ranma 4b: Plate compactor 4c: Slope mower 6:Power tools 10: Motor unit 12: Main housing 14: Right body housing 16: Left body housing 18: Containment space 20: Storage section 20a: Front wall 20b: Lower wall 20c: Upper wall 20d: Back wall 20e: left wall 22: First battery mounting section 24: Second battery mounting section 26: First opening 26a: Air intake 28: Second opening 28a: Air intake 32: Base 32a:Top surface 56: Battery housing 56a: Bottom surface 56b: Left side 56c: Right side 58: Hook 60: Right battery rail 62: Left battery rail 64: Engagement part 66:Operation section 70: First battery terminal 72: Second battery terminal 74: Main power switch 78a: Operation switch 84: Motor housing 86: Motor 86a: Upper end 86b: Bottom edge 88: Fan 90: Fixed unit 92: Plate material 94: Vibration isolation section 96: Right cover part 98: Left cover part 100: Support unit 102: Control unit 104: Cylindrical vibration-isolating member 108: Motor housing body 110: Front bracket 112: Rear bracket 122: Motor housing space 132: Stator body 134: Coil 136: Outer rotor body 138: Permanent magnet 140: Motor shaft 140a: Central axis 140b: Front end 142: Bearing 144: Bearing 148: 1st fixed part 148a: 1st fixed surface 150:Second fixed part 150a: 2nd fixed surface 154: Plate body 170: First right vibration isolating member 172: Second right vibration isolating member 174: Third right vibration-proof member 176: First left vibration-proof member 178: Second left vibration-proof member 180: Third left vibration-proof member 184: Support plate 192: PCB housing 194: Filter material 196: Control circuit board 196a: Mounting surface 197: Circuit board case 202: Intake port 203: Substrate storage space 208: Air passage 300: Upper housing 302: Handle unit 304: Working section 320: Telescopic part 322: Land preparation department 328: Leveling plate 350: Base 352: Handle unit 354: Transmission device 356:Working department 360:Fixed base 378: Vibratory body 380: Leveling plate 400: Housing 402: Front wheel 404: Rear wheel 406: Handle unit 408:Working department 412:Fixed stand 428: Blade 500: Front through hole 506: Rear through hole 510: Air hole 514: Teeth 520: Sensor board 530: First switch signal line 532: Signal line for connecting the first switch 534: First switch connection terminal 536: Second switch wire 538: Wire for connecting the second switch 540: Terminal for connecting the second switch 542: Electronic parts 544: Terminal accommodating space 560: Motor power line 562: Power line for motor connection 564: First motor connection terminal 566: Motor signal line 568: Motor connection signal line 570: Terminal for connecting the second motor 590: 1st battery power line 592: First battery signal line 594: Signal line for connecting the first battery 596: Terminal for connecting the first battery 598: Second battery power line 600: Second battery signal line 602: Signal line for connecting the second battery 604: Terminal for connecting the second battery BP: Battery pack BP1: 1st battery pack BP2: Second battery pack D1: Installation direction D2:Removal direction DR1, DR2: Diameter G1: Center of gravity L10, L11, L12, L13: Distance P1: Placement surface P2: Orthogonal plane

Claims

1. A motor unit that is detachably attached to each of a plurality of types of working units and operates the working units, a main body housing including a storage section having a first wall, a first battery mounting section disposed on the first wall, and a second battery mounting section disposed on the first wall; A motor is disposed inside the housing and operates the working unit, A first battery that supplies power to the motor is attached to the first battery attachment portion so as to be slidable along the first wall, A second battery that supplies power to the motor is attached to the second battery attachment portion so as to be slidable along the first wall, the storage portion is not disposed between the first battery attached to the first battery mounting portion and the second battery attached to the second battery mounting portion, the first battery has a first side; A motor unit, wherein the second battery has a second side that faces the first side and is arranged parallel to the first side when the first battery is attached to the first battery mounting portion and the second battery is attached to the second battery mounting portion.

2. The motor unit according to claim 1, wherein the motor unit does not have a wall portion disposed between the first side surface of the first battery and the second side surface of the second battery when the first battery is attached to the first battery mounting portion and the second battery is attached to the second battery mounting portion.

3. The motor unit according to claim 1 , wherein the first wall is disposed above the motor when the motor unit is placed on a placement surface.

4. The motor unit according to claim 1 , wherein the first wall has a first surface on which the first battery mounting portion and the second battery mounting portion are arranged.

5. The motor unit according to claim 1 , further comprising an elastically deformable vibration isolating member disposed between the motor and the main body housing.

6. a motor housing that houses the motor; a plate member fixed to the motor housing, The motor unit according to claim 5 , wherein the vibration-isolating member is fixed to the plate member and the main body housing.

7. A control unit disposed inside the housing and controlling the motor; The motor unit according to claim 6 , further comprising: a support unit that supports the control unit and is fixed to the plate member via the vibration isolation member.

8. each of the first battery and the second battery includes a hook that is operated by a user; The motor unit according to claim 1 , wherein the main body housing includes an engaged portion that engages with the hook.

9. The motor unit according to claim 1 , wherein the first battery mounting portion does not overlap the second battery mounting portion when the motor unit is viewed in a direction perpendicular to the first wall.

10. The first battery is attached to the first battery attachment portion so as to be slidable in a first direction along the first wall, The second battery is attached to the second battery attachment portion so as to be slidable in the first direction, The motor unit according to claim 1 , wherein the motor includes a motor shaft extending in the first direction and fixed to the working unit.

11. The motor may further include a control unit disposed inside the housing and controlling the motor. The motor unit of claim 10 , wherein the control unit at least partially overlaps the motor when the motor unit is viewed in the first direction.

12. The working unit further includes a fixing portion fixed to the working unit, The motor unit according to claim 1 , wherein the motor is disposed between the fixed portion and the first battery mounting portion and between the fixed portion and the second battery mounting portion.

13. A motor unit that is detachably attached to each of a plurality of types of working units and operates the working units, a main body housing including a storage section having a first wall, a first battery mounting section disposed on the first wall, and a second battery mounting section disposed on the first wall; A motor is disposed inside the housing and operates the working unit, A first battery that supplies power to the motor is attached to the first battery attachment portion, A second battery that supplies power to the motor is attached to the second battery attachment portion, A motor unit, wherein the maximum output value of the motor is 1.5 kW or more and 2.35 kW or less.

14. The torque of the motor is equal to or greater than 2.0 N·m and equal to or less than 11.0 N·m, The motor unit according to claim 13, wherein the rotation speed of the motor is equal to or higher than 3000 rpm and equal to or lower than 4300 rpm.

15. The volume of the main body housing is 9500 cm ３ 15. The motor unit according to claim 13 or 14, wherein:

16. The volume of the first battery and the volume of the second battery are each 1500 cm ３ 16. A motor unit according to any one of claims 13 to 15, wherein:

17. The motor unit according to claim 13 , wherein the first wall is disposed above the motor when the motor unit is placed on a placement surface.

18. The first battery is attached to the first battery attachment portion so as to be slidable in a first direction along the first wall, The second battery is attached to the second battery attachment portion so as to be slidable in the first direction, The motor unit according to claim 13 , wherein the motor includes a motor shaft extending in the first direction and fixed to the working unit.

19. The working unit further includes a fixing portion fixed to the working unit, The motor unit according to any one of claims 13 to 18, wherein the motor is disposed between the fixed portion and the first battery mounting portion and between the fixed portion and the second battery mounting portion.

20. 20. The motor unit according to claim 13, wherein the first battery attached to the first battery mounting portion and the second battery attached to the second battery mounting portion are electrically connected in series.

21. A motor unit that is detachably attached to each of a plurality of types of working units and operates the working units, a main body housing including a storage section having a first wall, a first battery mounting section disposed on the first wall, and a second battery mounting section disposed on the first wall; A motor disposed inside the housing for operating the working unit; a fixing unit including a first fixing portion and a second fixing portion, A first battery that supplies power to the motor is attached to the first battery attachment portion, A second battery that supplies power to the motor is attached to the second battery attachment portion, The plurality of types of work units include a first work unit and a second work unit different from the first work unit, The first fixed portion is fixed to the first working unit, The second fixed portion is fixed to the second working unit.

22. When the motor unit is placed on a placement surface, the first fixing portion is placed on the placement surface, The motor unit according to claim 21 , wherein the motor is disposed between the first fixed portion and the first battery mounting portion, and between the first fixed portion and the second battery mounting portion.

23. The motor housing further includes a motor housing for housing the motor. The motor unit according to claim 21 or 22, wherein the second fixing portion is formed on the motor housing.

24. The first fixing portion includes a first fixing surface that is fixed to the first working unit, The second fixing portion includes a second fixing surface that is fixed to the second working unit, The motor unit according to claim 21 , wherein the second fixing surface is substantially perpendicular to the first fixing surface.

25. The vehicle further includes a fan disposed inside the housing and rotated by operation of the motor, A first air hole is formed between the housing portion and the second fixing portion, A second air hole is formed in the second fixing portion, 25. A motor unit as described in any one of claims 21 to 24, wherein when the fan rotates, air flows into the interior of the storage section through one of the first air hole and the second air hole, and flows out to the exterior of the storage section through the other of the first air hole and the second air hole.

26. 26. The motor unit according to claim 21, wherein a rated capacity of the first battery is different from a rated capacity of the second battery.

27. A work machine, Ranma and A motor unit that is detachably attached to the rammer and operates the rammer, The motor unit includes: a main body housing including a storage section, a first battery mounting section disposed in the storage section, and a second battery mounting section disposed in the storage section; A DC motor is disposed inside the housing and operates the rammer. A first battery that supplies power to the DC motor is attached to the first battery attachment portion, A second battery that supplies power to the DC motor is attached to the second battery attachment portion.

28. a motor unit that is detachably attached to each of a first working unit and a second working unit and drives the first working unit and the second working unit, A motor having a motor shaft and a maximum output value of 1.8 kW or more; a motor housing for supporting the motor; a main body housing that includes a battery mounting portion to which a battery pack is detachably attached and that accommodates the motor housing; a first bearing and a second bearing attached to the motor housing and rotatably supporting the motor shaft; The second bearing is disposed rearward of the first bearing, A motor unit, wherein a distance between a front end of the first bearing and a rear end of the second bearing is 115 mm or less.

29. 29. The motor unit of claim 28, wherein the first bearing and the second bearing are disposed inside the motor housing.

30. The motor housing includes: a first member to which the first bearing is attached; and 30. The motor unit according to claim 28 or 29, further comprising: a second member to which the second bearing is attached, the second member defining an accommodation space for accommodating the motor between the first member and the second member.

31. The motor shaft is fixed to the fan, and the fan is disposed only outside the storage space. The motor housing has an air hole. The motor unit according to claim 30, wherein air flows into the accommodation space through the air hole due to rotation of the fan.

32. a control unit for operating the motor; 32. The motor unit of claim 31, wherein air flows from the control unit towards the air vents due to rotation of the fan.

33. The motor unit of claim 32, wherein the control unit at least partially overlaps the motor when the motor unit is viewed in a direction in which the motor shaft extends.

34. The motor further includes a sensor substrate disposed in the housing space and configured to detect rotation of the motor. the motor shaft includes a fixed portion that is fixed to each of the first working unit and the second working unit, the first bearing is disposed between the fixed portion and the second bearing, The motor unit according to claim 30 , wherein the sensor board is fixed to the second member.

35. The present invention further includes a fixing unit including a first fixing portion fixed to the first working unit and a second fixing portion fixed to the second working unit, When the motor unit is placed on a placement surface, the first fixing portion is placed on the placement surface, the motor shaft includes a fixed portion that is fixed to each of the first working unit and the second working unit, 35. A motor unit according to any one of claims 28 to 34, wherein the fixed portion of the motor shaft is generally parallel to the first fixed portion.

36. The present invention further includes a fixing unit including a first fixing portion fixed to the first working unit and a second fixing portion fixed to the second working unit, When the motor unit is placed on a placement surface, the first fixing portion is placed on the placement surface, 36. A motor unit as described in any one of claims 28 to 35, wherein when the battery pack is attached to the battery mounting portion, the battery pack is approximately parallel to the first fixed portion and positioned above the motor.

37. 37. The motor unit according to any one of claims 28 to 36, wherein the battery pack is usable in a power tool.

38. and a switch for receiving user operation to control the motor.

38. The motor unit according to any one of claims 28 to 37, wherein the switch is disposed on the main body housing.

39. a control unit for operating the motor; A switch wire extending from the switch; a switch connecting wire extending from the control unit and connected to the switch wire, the battery attachment portion is disposed on a first wall of the main body housing, The motor unit according to claim 38, wherein a terminal for connecting the switch wire and the switch connecting wire is disposed in a space between the first wall and the control unit.

40. a motor wire extending from the motor; a motor connecting wire extending from the control unit and connected to the motor wire, 40. The motor unit according to claim 39, wherein a terminal for connecting the motor electric wire and the motor connecting electric wire is disposed in the space between the first wall and the control unit.

41. The motor is A stator body; A coil wound around the stator body; A rotor body; a plurality of magnets fixed to the rotor body; The residual magnetic flux density of the magnet is 1.32 T or more, 41. The motor unit according to claim 28, wherein the coercive force of the magnet is 971 kA / m or more.

42. 42. The motor unit of claim 41, wherein the magnet is a neodymium magnet.

43. The stator body includes a plurality of teeth.

43. The motor unit according to claim 41, wherein the number of the magnets is equal to or greater than the number of the teeth.

44. a control unit for operating the motor; 44. A motor unit as described in any one of claims 41 to 43, further comprising an anti-vibration member that is elastically deformable and suppresses the transmission of vibrations of the motor from the motor to the battery mounting portion and the transmission of vibrations of the motor from the motor to the control unit.

45. a motor unit that is detachably attached to each of a first working unit and a second working unit and drives the first working unit and the second working unit, a motor having a motor shaft; a motor housing having an accommodation space for accommodating the motor and having an air hole; a main body housing that includes a battery mounting portion to which a battery pack is detachably attached and that accommodates the motor housing; a fan fixed to the motor shaft and disposed only outside the accommodation space; a fixing unit including a first fixing portion fixed to the first working unit and a second fixing portion fixed to the second working unit, When the fan rotates, air passes through the space inside the main body housing and outside the motor housing, the air hole, and the storage space in that order.

46. a control unit for operating the motor; 46. ​​The motor unit of claim 45, wherein air flows from the control unit towards the air vents due to rotation of the fan.

47. 47. The motor unit of claim 46, wherein the control unit at least partially overlaps the motor when the motor unit is viewed in a direction in which the motor shaft extends.

48. a motor unit that is detachably attached to each of a first working unit and a second working unit and that operates the first working unit and the second working unit, A motor; a motor housing for supporting the motor; a control unit for operating the motor; a main body housing including a battery mounting portion to which a battery pack is detachably attached, the main body housing housing the motor housing and the control unit; a motor wire extending from the motor; a motor connecting wire extending from the control unit and connected to the motor wire, the battery attachment portion is disposed on a first wall of the main body housing, A motor unit, wherein a terminal for connecting the motor electric wire and the motor connecting electric wire is disposed in the space between the first wall and the control unit.

49. A switch for receiving a user's operation to control the motor; A switch wire extending from the switch; a switch connecting wire extending from the control unit and connected to the switch wire, The motor unit according to claim 48, wherein a terminal for connecting the switch wire and the switch connecting wire is disposed in the space between the first wall and the control unit.

50. a motor unit that is detachably attached to each of a first working unit and a second working unit and that operates the first working unit and the second working unit, A motor; a motor housing for supporting the motor; a main body housing that includes a battery mounting portion to which a battery pack is detachably attached and that accommodates the motor housing; a fixing unit including a first fixing portion fixed to the first working unit and a second fixing portion fixed to the second working unit, The motor is A stator body; A coil wound around the stator body; A rotor body; a plurality of magnets fixed to the rotor body; The residual magnetic flux density of the magnet is 1.32 T or more, A motor unit, wherein the magnet has a coercive force of 971 kA / m or more.

51. 51. The motor unit of claim 50, wherein the magnet is a neodymium magnet.

52. The stator body includes a plurality of teeth.

52. The motor unit according to claim 50 or 51, wherein the number of the magnets is equal to or greater than the number of the teeth.

Images