Motor unit and working machine

Abstract

The present invention provides a motor unit and a working machine. The motor unit comprises: a main body housing having a housing portion having a first wall, a first battery mounting portion arranged on the first wall, and a second battery mounting portion arranged on the first wall; and a motor, which is arranged inside the housing portion and causes the working unit to operate. A first battery for supplying power to the motor is mounted on the first battery mounting portion in a manner that allows it to slide along the first wall. A second battery for supplying power to the motor is mounted on the second battery mounting portion in a manner that allows it to slide along the first wall. The first battery comprises a first side surface. The second battery comprises a second side surface that is opposite to the first side surface and is arranged parallel to the first side surface when the first battery is mounted on the first battery mounting portion and the second battery is mounted on the second battery mounting portion.

Description

Technical Field

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

[0002] A motor unit is disclosed in the specification of U.S. Patent Application Publication No. 2021 / 0143710. The motor unit is installed in a detachable manner on a plurality of operating units, and causes the operating units to operate. The motor unit comprises: a receiving portion having a first wall, a battery mounting portion arranged on the first wall, and a motor arranged inside the receiving portion and causing the operating unit to operate. A battery for supplying power to the motor is installed on the battery mounting portion in a manner that allows it to slide along the first wall.

[0003] In addition, a motor unit is disclosed in International Publication No. 2020 / 049617. The motor unit is mounted on the first working unit and the second working unit in a detachable manner, respectively, and causes the first working unit and the second working unit to operate. The motor unit comprises: a motor having a motor shaft; a motor housing that supports the motor; a main body housing that has a battery mounting portion for mounting a battery pack in a detachable manner and accommodates the motor housing; a first bearing and a second bearing that are mounted on the motor housing and support the motor shaft so that it can rotate; a first fan that is fixed to the motor shaft; and a control unit that causes the motor to operate. Summary of the invention

[0004] In the motor unit of the above-mentioned US Patent Application Publication No. 2021 / 0143710, a dedicated large-sized storage battery is used. It is desirable to use a small-sized storage battery with high versatility.

[0005] In the motor unit of International Publication No. 2020 / 049617, the first fan is disposed between the first bearing and the second bearing. Therefore, the distance between the first bearing and the second bearing needs to be designed to be longer. As a result, the motor unit becomes larger.

[0006] In addition, in the motor unit of International Publication No. 2020 / 049617, the first fan is arranged in the housing space of the motor housing. As a result, the motor housing is enlarged, and therefore the motor unit is enlarged.

[0007] In addition, in the motor unit, a space is sometimes formed between the control unit and the wall of the main body case where the battery mounting portion is disposed. It is desirable to effectively utilize the space between the control unit and the wall of the main body case where the battery mounting portion is disposed.

[0008] In addition, in the motor unit of International Publication No. 2020 / 049617 described above, it is desired to reduce the size of the motor unit by reducing the size of the magnet.

[0009] According to the present specification, the purpose is to provide at least one of: a technology capable of using a small battery with high versatility in a motor unit, a technology capable of preventing the motor unit from becoming larger, and a technology capable of effectively utilizing the space between the control unit and the wall of the main body casing.

[0010] The present specification discloses a motor unit. The motor unit is mounted on a plurality of working units in a detachable manner, and causes the working units to operate. The motor unit includes: a main body housing including a housing having a first wall, a first battery mounting portion arranged on the first wall, and a second battery mounting portion arranged on the first wall; and a motor arranged inside the housing portion, and causes the working unit to operate. A first battery for supplying power to the motor is mounted on the first battery mounting portion in a manner that allows it to slide along the first wall. A second battery for supplying power to the motor is mounted on the second battery mounting portion in a manner that allows it to slide along the first wall. No housing portion is arranged between the first battery mounted on the first battery mounting portion and the second battery mounted on the second battery mounting portion. The first battery includes a first side surface. The second battery includes a second side surface that is opposite to the first side surface and is arranged parallel to the first side surface when the first battery is mounted on the first battery mounting portion and the second battery is mounted on the second battery mounting portion.

[0011] The first battery and the second battery are small batteries with high versatility. According to the above configuration, the first battery is mounted on the first battery mounting portion, and the second battery is mounted on the second battery mounting portion. Accordingly, the small first battery and the second battery with high versatility can be used in the motor unit. In addition, the first side surface of the first battery and the second side surface of the second battery are parallel to each other, so that the motor unit equipped with the first battery and the second battery can be miniaturized compared to a configuration in which the first side surface of the first battery and the second side surface of the second battery are not parallel to each other.

[0012] In addition, the present specification discloses a motor unit. The motor unit is installed in a detachable manner on a plurality of operating units, respectively, and causes the operating units to operate. The motor unit comprises: a main body housing having a housing having a first wall, a first battery mounting portion arranged on the first wall, and a second battery mounting portion arranged on the first wall; and a motor, which is arranged inside the housing portion and causes the operating unit to operate. A first battery for supplying power to the motor is installed on the first battery mounting portion. A second battery for supplying power to the motor is installed on the second battery mounting portion. The maximum output value of the motor is greater than 1.5 kW and less than 2.35 kW.

[0013] The first battery and the second battery are small batteries with high versatility. According to the above configuration, the first battery is mounted on the first battery mounting portion, and the second battery is mounted on the second battery mounting portion. In addition, a motor with a maximum output value of 1.5 kW or more and 2.35 kW or less is used to operate a relatively high output operation unit. Accordingly, the small first battery and the second battery with high versatility can be used in the motor unit to operate a relatively high output operation unit.

[0014] In addition, the present specification discloses a motor unit. The motor unit is respectively installed in a plurality of working units in a detachable manner, and causes the working units to operate. The motor unit includes: a main body housing, which includes a housing having a first wall, a first battery mounting portion arranged on the first wall, and a second battery mounting portion arranged on the first wall; a motor, which is arranged inside the housing portion and causes the working unit to operate; and a fixing unit, which is supported by the housing portion and includes a first fixing portion and a second fixing portion. A first battery for supplying power to the motor is installed on the first battery mounting portion. A second battery for supplying power to the motor is installed on the second battery mounting portion. The plurality of working units include: a first working unit, and a second working unit different from the first working unit. The first fixing portion is fixed to the first working unit. The second fixing portion is fixed to the second working unit.

[0015] The first battery and the second battery are small batteries with high versatility. According to the above configuration, the first battery is mounted on the first battery mounting portion, and the second battery is mounted on the second battery mounting portion. Accordingly, the small first battery and the second battery with high versatility can be used in the motor unit. In addition, the motor unit is fixed to the first operating unit by means of the first fixing portion, and is fixed to the second operating unit by means of the second fixing portion. Accordingly, the types of operating units that can use the motor unit can be increased.

[0016] In addition, the present specification discloses a working machine. The working machine includes: a rammer, and a motor unit that is detachably mounted on the rammer and operates the rammer. The motor unit includes: a main body housing that includes a housing, a first battery mounting portion that is arranged in the housing, and a second battery mounting portion that is arranged in the housing; and a DC motor that is arranged inside the housing and operates the rammer. A first battery that supplies power to the DC motor is mounted on the first battery mounting portion. A second battery that supplies power to the DC motor is mounted on the second battery mounting portion.

[0017] The first battery and the second battery are small batteries with high versatility. According to the above configuration, the first battery is mounted on the first battery mounting portion, and the second battery is mounted on the second battery mounting portion. Thus, the small first battery and the second battery with high versatility can be used in the motor unit to operate the tamping machine.

[0018] In addition, the present specification discloses a motor unit. The motor unit is installed in a detachable manner on the first working unit and the second working unit, respectively, and causes the first working unit and the second working unit to operate. The motor unit comprises: a motor having a motor shaft and a maximum output value of 1.8 kW or more; a motor housing that supports the motor; a main body housing that has a battery mounting portion for mounting a battery pack in a detachable manner and accommodates the motor housing; and a first bearing and a second bearing that are mounted on the motor housing and support the motor shaft so as to be rotatable. The second bearing is arranged at a position further to the rear side than the first bearing. The distance between the front end of the first bearing and the rear end of the second bearing is less than 115 mm.

[0019] According to the above configuration, compared with 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, it is possible to suppress an increase in size of the motor unit.

[0020] In addition, the present specification discloses a motor unit. The motor unit is respectively installed on the first working unit and the second working unit in a detachable manner, and causes the first working unit and the second working unit to operate. The motor unit includes: a motor having a motor shaft; a motor housing having a storage space for storing the motor and having an air hole; a main body housing having a battery mounting portion for mounting a battery pack in a detachable manner and storing the motor housing; a fan fixed to the motor shaft and arranged only outside the storage space; and a fixing unit having 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 sequence.

[0021] According to the above configuration, since the fan is arranged outside the storage space, it is possible to suppress the motor housing from becoming larger in size. Accordingly, it is possible to suppress the motor unit from becoming larger in size.

[0022] In addition, the present specification discloses a motor unit. The motor unit is detachably mounted on the first operating unit and the second operating unit, respectively, and causes the first operating unit and the second operating unit to operate. The motor unit includes: a motor; a motor housing that supports the motor; a control unit that causes the motor to operate; a main housing that includes a battery mounting portion that detachably mounts a battery pack and accommodates the motor housing and the control unit; a motor wire that extends from the motor; and a motor connection wire that extends from the control unit and is connected to the motor wire. The battery mounting portion is arranged on the first wall of the main housing. The terminal that connects the motor wire to the motor connection wire is arranged in the space between the first wall and the control unit.

[0023] According to the above configuration, since the terminal connecting the motor wire and the motor connecting wire is arranged in the space between the first wall and the control unit, the space between the first wall and the control unit can be effectively utilized.

[0024] In addition, the present specification discloses a motor unit. The motor unit is respectively installed on the first working unit and the second working unit in a detachable manner, and causes the first working unit and the second working unit to operate. The motor unit comprises: a motor; a motor housing that supports the motor; a main body housing that has a battery mounting portion that mounts a battery pack in a detachable manner and accommodates the motor housing; and a fixing unit that has a first fixing portion fixed to the first working unit and a second fixing portion fixed to the second working unit. The motor comprises: a stator body, a coil wound on 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 greater than 1.32T. The coercive force bHc of the magnet is greater than 971kA / m.

[0025] According to the above configuration, the magnet can be made smaller than 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. This allows the motor unit to be made smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the system 1 of the first embodiment.

[0027] Figure 2 It is a perspective view of the motor unit 10 and the tamping machine 4a according to the first embodiment.

[0028] Figure 3 It is a perspective view of the motor unit 10 and the plate compactor 4b according to the first embodiment.

[0029] Figure 4 It is a perspective view of the motor unit 10 and the battery pack BP according to the first embodiment.

[0030] Figure 5 This is a table showing the specifications of the motor unit 10, the main body case 12, the motor 86, and the battery pack BP according to the first embodiment.

[0031] Figure 6 It is a perspective view of the motor unit 10 and the battery pack BP according to the first embodiment.

[0032] Figure 7 It is a perspective view of the vicinity of the first battery mounting portion 22 and the second battery mounting portion 24 in the motor unit 10 according to the first embodiment.

[0033] Figure 8 It is a cross-sectional view showing the vicinity of the first battery pack BP1 and the second battery pack BP2 in the motor unit 10 according to the first embodiment.

[0034] Fig. 9 This is a table showing the specifications of the motor 86 and the battery pack BP in the first embodiment.

[0035] Fig.10 It is a perspective view of the battery pack BP according to the first embodiment.

[0036] Fig.11 It is a cross-sectional view of the vicinity of the first battery mounting portion 22 and the first battery pack BP1 in the motor unit 10 of the first embodiment.

[0037] Fig.12 It is an exploded perspective view of the motor unit 10 according to the first embodiment.

[0038] Fig.13 It is a cross-sectional view of the motor unit 10 and the battery pack BP according to the first embodiment.

[0039] Fig.14 It is a perspective view of the motor housing 84 and the motor 86 of the first embodiment.

[0040] Fig.15 It is a cross-sectional view of the vicinity of the air intake port 26 a in the motor unit 10 according to the first embodiment.

[0041] Fig.16 It is a cross-sectional view of the motor housing 84, the motor 86, and the fan 88 according to the first embodiment.

[0042] Fig.17It is an exploded perspective view of the motor housing 84, the motor 86, and the plate member 92 according to the first embodiment.

[0043] Fig.18 This is an exploded perspective view of a state in which the main body housing 12 and the support unit 100 of the motor unit 10 according to the first embodiment are removed.

[0044] Fig.19 This is an exploded perspective view of a state in which the main body housing 12 and the support unit 100 of the motor unit 10 according to the first embodiment are removed.

[0045] Fig. 20 It is a right side view of the motor unit 10 according to the first embodiment in a state where the main body housing 12 and the support unit 100 are removed.

[0046] Fig.21 This is a left side view of the motor unit 10 according to the first embodiment in a state where the main body housing 12 and the support unit 100 are removed.

[0047] Fig. 22 It is a cross-sectional view of the motor unit 10 according to the first embodiment.

[0048] Fig.23 This is a front view of the motor unit 10 according to the first embodiment in a state where the main body housing 12 is removed.

[0049] Fig.24 This is an exploded perspective view of a state in which the main body housing 12 of the motor unit 10 according to the first embodiment is removed.

[0050] Fig.25 This is an exploded perspective view of a state in which the main body housing 12 of the motor unit 10 according to the first embodiment is removed.

[0051] Fig.26 It is a cross-sectional view of the vicinity of the control unit 102 in the motor unit 10 according to the first embodiment.

[0052] Fig. 27 It is a left side view of the motor unit 10 and the tamping machine 4a according to the first embodiment.

[0053] Fig.28 It is a front view of the motor housing 84, the motor 86, and the fixing unit 90 of the first embodiment.

[0054] Fig.29 It is a perspective view of the vicinity of the fixing stand 308 of the earth-rammer 4a according to the first embodiment.

[0055] Fig.30 It is an exploded perspective view of the motor unit 10 and the tamping machine 4a according to the first embodiment.

[0056] Fig.31 It is a left side view of the motor unit 10 and the plate compactor 4b according to the first embodiment.

[0057] Fig.32 It is an exploded perspective view of the first fixing portion 148 and the plate compactor 4b of the first embodiment.

[0058] Fig.33 It is a side view of the motor unit 10 and the slope mower 4c according to the first embodiment.

[0059] Fig.34 It is a perspective view of the motor unit 10 and the battery pack BP according to the second embodiment.

[0060] Fig.35 It is a perspective view of the motor unit 10 and the battery pack BP according to the third embodiment.

[0061] Fig.36 It is a right side view of the motor unit 10 according to the fourth embodiment in a state where the main body housing 12 and the support unit 100 are removed.

[0062] Fig.37 It is a right side view of the motor unit 10 according to the fifth embodiment in a state where the main body housing 12 and the support unit 100 are removed.

[0063] Fig.38 It is a perspective view of the electric tool 6 according to the sixth embodiment.

[0064] Fig.39 It is a right sectional view of the motor housing 84, the motor 86, and the fan 88 of the sixth embodiment.

[0065] Fig.40 It is a right sectional view of the motor housing 84, the motor 86, and the fan 88 of the sixth embodiment.

[0066] Fig.41 It is a rear cross-sectional view of the motor housing 84 and the motor 86 of the sixth embodiment.

[0067] Fig.42 This is a right cross-sectional view of the vicinity of the sensor substrate 520 in the motor housing 84 and the motor 86 according to the sixth embodiment.

[0068] Fig.43 It is a rear cross-sectional view of the vicinity of the main power switch 74, the display panel 76, and the rotation speed change switch 78b in the motor unit 10 of the sixth embodiment.

[0069] Fig.44It is a right view of the control unit 102, the first switch signal line 530, the first switch connection signal line 532, the first switch connection terminal 534, the second switch wire 536, the second switch connection wire 538, and the second switch connection terminal 540 of the sixth embodiment.

[0070] Fig.45 This is a perspective view of a motor unit 10 according to the sixth embodiment in a state where the left main body case 16 is removed.

[0071] Fig.46 It is a perspective view of the vicinity of the terminal accommodating space 544 of the motor unit 10 according to the sixth embodiment.

[0072] Fig.47 It is a schematic diagram of the motor unit 10 according to the sixth embodiment.

[0073] Fig.48 It is a three-dimensional diagram of the motor housing 84, control unit 102, cylindrical vibration-proof component 104, motor power cord 560, motor connection power cord 562, first motor connection terminal 564, motor signal cord 566, motor connection signal cord 568, and second motor connection terminal 570 of the sixth embodiment.

[0074] Fig.49 This is a perspective view of a motor unit 10 according to the sixth embodiment in a state where the right main body case 14 is removed.

[0075] Fig.50 It is a perspective view of a state where the right main body case 14 , the plate member 92 , the right cover member 96 , and the support unit 100 in the motor unit 10 of the sixth embodiment are removed.

[0076] Fig.51 It is a right side view of the motor unit 10 according to the sixth embodiment in a state where the right main body case 14 is removed. DETAILED DESCRIPTION

[0077] Hereinafter, representative but non-limiting specific examples of the present invention will be described in detail with reference to the accompanying drawings. This detailed description is intended only to show the details of the preferred examples for implementing the present invention to those skilled in the art, and is not intended to limit the scope of the present invention. In addition, the additional features and inventions disclosed are intended to provide a further improved motor unit and working machine, and can be used alone or in conjunction with other features or inventions.

[0078] In addition, the combination of features or processes disclosed in the following detailed description is not necessary to practice the invention in the broadest sense, and in particular is only described for the purpose of illustrating representative specific examples of the invention. In addition, the individual features of the following representative specific examples and the individual features described in the claims do not necessarily have to be combined as described below, that is, as described in the specific examples described herein, or in the order listed, to provide additional and useful embodiments of the invention.

[0079] All features described in this specification and / or claims also have the following intention: in addition to the configuration of the features described in the embodiments and / or claims, they are intended to be disclosed individually and independently of each other as limitations for the disclosure at the time of the initial application and the specific matters described in the claims. In addition, all numerical ranges and groupings or group-related records have the following intention: as limitations for the disclosure at the time of the initial application and the specific matters described in the claims, the intention of disclosing their intermediate configurations.

[0080] The present specification discloses a motor unit. The motor unit is mounted on a plurality of working units in a detachable manner, and causes the working units to operate. The motor unit includes: a main body housing including a housing having a first wall, a first battery mounting portion arranged on the first wall, and a second battery mounting portion arranged on the first wall; and a motor arranged inside the housing portion, and causes the working unit to operate. A first battery for supplying power to the motor is mounted on the first battery mounting portion in a manner that allows it to slide along the first wall. A second battery for supplying power to the motor is mounted on the second battery mounting portion in a manner that allows it to slide along the first wall. No housing is arranged between the first battery mounted on the first battery mounting portion and the second battery mounted on the second battery mounting portion. The first battery includes a first side surface. The second battery includes a second side surface that is opposite to the first side surface and is arranged parallel to the first side surface when the first battery is mounted on the first battery mounting portion and the second battery is mounted on the second battery mounting portion.

[0081] In one or more embodiments, the motor unit may not include: a wall portion arranged between the first side surface of the first battery and the second side surface of the second battery when the first battery is mounted on the first battery mounting portion and the second battery is mounted on the second battery mounting portion.

[0082] According to the above configuration, the motor unit on which the first battery and the second battery are mounted can be further reduced in size.

[0083] In one or more embodiments, when the motor unit is placed on the placement surface, the first wall may be arranged on an upper side of the motor.

[0084] The motor is a heavy component. In addition, 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 structure, the heavy motor can be arranged at a position closer to the mounting surface than the first battery and the second battery.

[0085] In one or more embodiments, the first wall may include a first surface for arranging the first battery mounting portion and the second battery mounting portion.

[0086] According to the above configuration, the first battery can be easily mounted on the first battery mounting portion, and the second battery can be easily mounted on the second battery mounting portion.

[0087] In one or more embodiments, the motor unit may further include an elastically deformable vibration-proof member that is disposed between the motor and the main body housing.

[0088] According to the above configuration, it is possible to suppress the vibration from being transmitted from the motor to the main body housing. Accordingly, it is possible to suppress the vibration from being transmitted to the first battery and the second battery.

[0089] 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-proof member may be fixed to the plate member and the main body housing.

[0090] In a configuration where the vibration-proof member is directly fixed to the motor housing, the configuration of the motor housing becomes complicated. According to the above configuration, it is possible to suppress the configuration of the motor housing from becoming complicated.

[0091] In one or more embodiments, the motor unit may further include a control unit that is disposed inside the housing portion and controls the motor, and a support unit that supports the control unit and is fixed to the plate member via a vibration-proof member.

[0092] According to the above configuration, it is possible to suppress the vibration from being transmitted to the control unit.

[0093] In one or more embodiments, the first storage battery and the second storage battery may each include a hook portion operated by a user. The main body casing may include an engaged portion engaged with the hook portion.

[0094] According to the above configuration, since the first storage battery and the second storage battery are engaged with the engaged portion of the main body case, it is possible to suppress the first storage battery and the second storage battery from being separated from the main body case.

[0095] 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 with the second battery mounting portion.

[0096] According to the above configuration, it is possible to suppress the structure of the first wall from becoming complicated, compared with a configuration in which the first battery mounting portion and the second battery mounting portion overlap when the motor unit is viewed in a direction perpendicular to the first wall.

[0097] In one or more embodiments, a first battery may be mounted on the first battery mounting portion so as to be slidable in a first direction along the first wall. A second battery may be mounted on 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 operation unit.

[0098] According to the above configuration, the direction in which the first battery is to slide and the direction in which the second battery is to slide can be easily understood by the posture of the motor shaft.

[0099] In one or more embodiments, the motor unit may further include a control unit that is disposed inside the housing portion and controls the motor. When the motor unit is viewed in the first direction, the control unit may at least partially overlap with the motor.

[0100] According to the above configuration, compared with a configuration in which the control unit at least partially does not overlap the motor when the motor unit is viewed in the first direction, it is possible to suppress the motor unit from becoming larger in a direction orthogonal to the first direction.

[0101] In one or more embodiments, the motor unit may further include a fixing portion fixed to the operation unit. The motor may be arranged between the fixing portion and the first battery mounting portion, and between the fixing portion and the second battery mounting portion.

[0102] According to the above configuration, it is possible to suppress interference between the first storage battery and the second storage battery and the working unit.

[0103] This specification discloses a motor unit. The motor unit is installed in a detachable manner on a plurality of operating units, respectively, and causes the operating units to operate. The motor unit comprises: a main body housing, which comprises a housing having a first wall, a first battery mounting portion arranged on the first wall, and a second battery mounting portion arranged on the first wall; and a motor, which is arranged inside the housing portion, and causes the operating unit to operate. A first battery for supplying power to the motor is installed on the first battery mounting portion. A second battery for supplying power to the motor is installed on the second battery mounting portion. The maximum output value of the motor is greater than 1.5 kW and less than 2.35 kW.

[0104] In one or more embodiments, the torque of the motor may be greater than or equal to 2.0 N·m and less than or equal to 11.0 N·m. The rotation speed of the motor may be greater than or equal to 3000 rpm and less than or equal to 4300 rpm.

[0105] A motor having 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 operation unit. Accordingly, a small first battery and a second battery with high versatility can be used in the motor unit to operate a relatively high-output operation unit.

[0106] In one or more embodiments, the volume of the main housing may be 9500 cm 3 the following.

[0107] Generally, the higher the maximum output value of the motor, the larger the motor will be. Accordingly, the main body shell will be larger. According to the above structure, in the motor unit that operates the working unit with a relatively high output, the main body shell can be miniaturized. Accordingly, the motor unit can be miniaturized.

[0108] In one or more embodiments, the volume of the first storage battery and the volume of the second storage battery may be 1500 cm 3 the following.

[0109] According to the above configuration, the motor unit can be reduced in size.

[0110] In one or more embodiments, when the motor unit is placed on the placement surface, the first wall may be arranged on an upper side of the motor.

[0111] The motor is a heavy component. In addition, 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 structure, the heavy motor can be arranged at a position closer to the mounting surface than the first battery and the second battery.

[0112] In one or more embodiments, a first battery may be mounted on the first battery mounting portion so as to be slidable in a first direction along the first wall. A second battery may be mounted on 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 operation unit.

[0113] According to the above configuration, the direction in which the first battery is to slide and the direction in which the second battery is to slide can be easily understood by the posture of the motor shaft.

[0114] In one or more embodiments, the motor unit may further include a fixing portion fixed to the operation unit. The motor may be arranged between the fixing portion and the first battery mounting portion, and between the fixing portion and the second battery mounting portion.

[0115] According to the above configuration, it is possible to suppress interference between the first storage battery and the second storage battery and the working unit.

[0116] 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.

[0117] 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.

[0118] This specification discloses a motor unit. The motor unit is installed in a detachable manner on a plurality of working units, respectively, and causes the working units to operate. The motor unit includes: a main body housing, which includes a housing having a first wall, a first battery mounting portion arranged on the first wall, and a second battery mounting portion arranged on the first wall; a motor, which is arranged inside the housing, and causes the working unit to operate; and a fixing unit, which is supported by the housing and includes a first fixing portion and a second fixing portion. A first battery for supplying power to the motor is installed on the first battery mounting portion. A second battery for supplying power to the motor is installed on the second battery mounting portion. The plurality of working units include: a first working unit, and a second working unit different from the first working unit. The first fixing portion is fixed to the first working unit. The second fixing portion is fixed to the second working unit.

[0119] In one or more embodiments, when the motor unit is placed on the placement surface, the first fixing portion may be placed on the placement surface. The motor may be arranged between the first fixing portion and the first battery mounting portion, and between the first fixing portion and the second battery mounting portion.

[0120] According to the above configuration, it is possible to suppress the first storage battery and the second storage battery from interfering with the first working unit.

[0121] 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 on the motor housing.

[0122] According to the above configuration, the number of components of the motor unit can be reduced compared to a configuration in which the second fixing portion is not formed on the motor housing.

[0123] In one or more embodiments, the first fixing portion may include a first fixing surface fixed to the first operation unit. The second fixing portion may include a second fixing surface fixed to the second operation unit. The second fixing surface may be substantially orthogonal to the first fixing surface.

[0124] According to the above configuration, the first fixing portion or the second fixing portion can be selected according to the shape of the working unit, etc. Thus, the types of working units that can use the motor unit can be increased.

[0125] In one or more embodiments, the motor unit may further include: a fan that is arranged inside the housing portion and rotated by the action of the motor. A first air hole may be formed between the housing portion and the second fixing portion. A second air hole may be formed in the second fixing portion. When the fan rotates, air may flow into the housing portion from one of the first air hole and the second air hole, and flow out to the outside of the housing portion from the other of the first air hole and the second air hole.

[0126] According to the above configuration, the motor disposed inside the housing portion can be cooled.

[0127] In one or more embodiments, the rated capacity of the first storage battery may be different from the rated capacity of the second storage battery.

[0128] According to the above configuration, various types of batteries can be used for the motor unit.

[0129] In addition, the present specification discloses a motor unit. The motor unit is installed in a detachable manner on the first working unit and the second working unit, respectively, and causes the first working unit and the second working unit to operate. The motor unit comprises: a motor having a motor shaft and a maximum output value of 1.8 kW or more; a motor housing that supports the motor; a main body housing that has a battery mounting portion for mounting a battery pack in a detachable manner and accommodates the motor housing; and a first bearing and a second bearing that are mounted on the motor housing and support the motor shaft so as to be rotatable. The second bearing is arranged at a position further to the rear side than the first bearing. The distance between the front end of the first bearing and the rear end of the second bearing is less than 115 mm.

[0130] In one or more embodiments, the first bearing and the second bearing may be disposed inside the motor housing.

[0131] According to the above configuration, it is possible to suppress a situation in which a user touches the first bearing and the second bearing.

[0132] In one or more embodiments, the motor housing may include: a first component on which the first bearing is mounted; and a second component which defines a housing space for housing the motor between the first component and the second component and on which the second bearing is mounted.

[0133] According to the above configuration, compared with a configuration in which the first bearing and the second bearing are mounted on the same member, it is possible to suppress the configuration of the motor housing from becoming complicated.

[0134] In one or more embodiments, the motor unit may further include: a fan fixed to the motor shaft and arranged only outside the storage space. The motor housing may have an air hole. Air may flow into the storage space from the air hole due to the rotation of the fan.

[0135] According to the above configuration, compared with a configuration in which the fan is disposed in the storage space, it is possible to suppress an increase in size of the motor housing.

[0136] In one or more embodiments, the motor unit may further include a control unit that operates the motor. The air may flow from the control unit to the air hole due to the rotation of the fan.

[0137] According to the above configuration, the air passes through the control unit and the air holes and then passes through the motor. Thus, both the control unit and the motor can be cooled by one air flow.

[0138] In one or more embodiments, when the motor unit is viewed in a direction in which the motor shaft extends, the control unit may at least partially overlap with the motor.

[0139] According to the above configuration, compared with a configuration in which the control unit and the motor do not overlap when the motor unit is viewed in the direction in which the motor shaft extends, it is possible to suppress the motor unit from becoming larger in a direction perpendicular to the direction in which the motor shaft extends.

[0140] In one or more embodiments, the motor unit may further include: a sensor substrate disposed in the housing space and detecting the rotation of the motor. The motor shaft may include: a fixing portion fixed to the first operating unit and the second operating unit, respectively. The first bearing may be disposed between the fixing portion and the second bearing. The sensor substrate is fixed to the second component.

[0141] According to the above configuration, compared with a configuration in which the sensor substrate is fixed to the first member, the sensor substrate can be spaced apart from the first operation unit and the second operation unit.

[0142] In one or more embodiments, the motor unit may further include a fixing unit including: a first fixing portion fixed to the first operating unit, and a second fixing portion fixed to the second operating unit. When the motor unit is placed on the placement surface, the first fixing portion may be placed on the placement surface. The motor shaft may include: fixing portions fixed to the first operating unit and the second operating unit, respectively. The fixing portion of the motor shaft is substantially parallel to the first fixing portion.

[0143] According to the above configuration, when the first fixing portion is fixed to the first working unit, the fixing portion of the motor shaft can be easily fixed to the first working unit.

[0144] In one or more embodiments, the motor unit may further include a fixing unit including a first fixing portion fixed to the first operation unit and a second fixing portion fixed to the second operation unit. When the motor unit is placed on the placement surface, the first fixing portion may be placed on the placement surface. When the battery pack is mounted on the battery mounting portion, the battery pack may be substantially parallel to the first fixing portion and arranged at a position higher than the motor.

[0145] The motor is a heavy component. In addition, the weight of the motor is greater than the weight of the battery pack. According to the above configuration, the heavy motor is arranged at a position closer to the mounting surface than the battery pack. Thus, the center of gravity of the motor unit can be brought close to the mounting surface.

[0146] In one or more embodiments, the battery pack may be configured to be usable in a power tool.

[0147] According to the above configuration, the motor unit can be operated using a highly versatile battery pack.

[0148] 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.

[0149] According to the above configuration, compared with a configuration in which the switch is disposed in a member other than the main body housing, it is possible to suppress the configuration of the motor unit from becoming complicated.

[0150] In one or more embodiments, the motor unit may further include: a control unit for operating the motor, a switch wire extending from the switch, and a switch connection wire extending from the control unit and connected to the switch wire. The battery mounting portion may be arranged on the first wall of the main body housing. A terminal for connecting the switch wire and the switch connection wire may be arranged in a space between the first wall and the control unit.

[0151] According to the above configuration, since the terminal connecting the switch wire and the switch connection wire can be arranged in the space between the first wall and the control unit, the space between the first wall and the control unit can be effectively utilized.

[0152] In one or more embodiments, the motor unit may further include: a motor wire extending from the motor, and a motor connection wire extending from the control unit and connected to the motor wire. A terminal connecting the motor wire and the motor connection wire may be arranged in a space between the first wall and the control unit.

[0153] According to the above configuration, since the terminal for connecting the motor wire and the motor connecting wire can be arranged in the space between the first wall and the control unit, the space between the first wall and the control unit can be effectively utilized.

[0154] In one or more embodiments, the 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 magnet may be greater than 1.32 T. The coercive force of the magnet may be greater than 971 kA / m.

[0155] According to the above configuration, the magnet can be made smaller than 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. This can reduce the size of the motor unit.

[0156] In one or more embodiments, the magnets may be neodymium magnets.

[0157] According to the above configuration, the magnetic force of the neodymium magnet is the strongest among the permanent magnets, so the magnet can be made smaller, thereby making the motor unit more compact.

[0158] In one or more embodiments, the stator body may include a plurality of teeth. The number of the plurality of magnets may be greater than the number of the plurality of teeth.

[0159] According to the above configuration, it is possible to suppress the occurrence of cogging during motor operation.

[0160] In one or more embodiments, the motor unit may further include: a control unit that operates the motor; and a vibration-proof component that can be elastically deformed and suppresses the transmission of motor vibration from the motor to the battery mounting portion, and the transmission of motor vibration from the motor to the control unit.

[0161] According to the above configuration, even if the motor vibrates due to the operation of the motor, it is possible to suppress the battery pack and the control unit from vibrating.

[0162] In addition, the present specification discloses a motor unit. The motor unit is respectively installed on the first working unit and the second working unit in a detachable manner, and causes the first working unit and the second working unit to operate. The motor unit includes: a motor having a motor shaft; a motor housing having a storage space for storing the motor and having an air hole; a main body housing having a battery mounting portion for mounting a battery pack in a detachable manner and storing the motor housing; a fan fixed to the motor shaft and arranged only outside the storage space; and a fixing unit having 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 sequence.

[0163] In one or more embodiments, the motor unit may further include a control unit that operates the motor. The air may flow from the control unit to the air hole due to the rotation of the fan.

[0164] According to the above configuration, the air passes through the control unit and the air holes and then passes through the motor. Thus, both the control unit and the motor can be cooled by one air flow.

[0165] In one or more embodiments, the control unit may at least partially overlap with the motor when the motor unit is viewed in the direction in which the motor shaft extends.

[0166] According to the above configuration, compared with a configuration in which the control unit and the motor do not overlap when the motor unit is viewed in the direction in which the motor shaft extends, it is possible to suppress the motor unit from becoming larger in a direction perpendicular to the direction in which the motor shaft extends.

[0167] In addition, the present specification discloses a motor unit. The motor unit is mounted on the first working unit and the second working unit, respectively, in a detachable manner, and causes the first working unit and the second working unit to operate. The motor unit includes: a motor; a motor housing that supports the motor; a control unit that causes the motor to operate; a main housing that includes a battery mounting portion that detachably mounts a battery pack and accommodates the motor housing and the control unit; a motor wire that extends from the motor; and a motor connection wire that extends from the control unit and is connected to the motor wire. The battery mounting portion is arranged on the first wall of the main housing. The terminal that connects the motor wire to the motor connection wire is arranged in the space between the first wall and the control unit.

[0168] In one or more embodiments, the motor unit may further include: a switch that receives an operation of a user to control the motor; a switch wire that extends from the switch; and a switch connection wire that extends from the control unit and is connected to the switch wire. A terminal that connects the switch wire to the switch connection wire may be arranged in a space between the first wall and the control unit.

[0169] According to the above configuration, since the terminal connecting the switch wire and the switch connection wire can be arranged in the space between the first wall and the control unit, the space between the first wall and the control unit can be effectively utilized.

[0170] In addition, the present specification discloses a motor unit. The motor unit is respectively installed on the first working unit and the second working unit in a detachable manner, and causes the first working unit and the second working unit to operate. The motor unit comprises: a motor; a motor housing that supports the motor; a main body housing that has a battery mounting portion that mounts a battery pack in a detachable manner and accommodates the motor housing; and a fixing unit that has a first fixing portion fixed to the first working unit and a second fixing portion fixed to the second working unit. The motor comprises: a stator body, a coil wound on the stator body, a rotor body, and a plurality of magnets fixed to the rotor body. The residual magnetic flux density of the magnet can be greater than 1.32 T. The coercive force of the magnet can be greater than 971 kA / m.

[0171] In one or more embodiments, the magnets may be neodymium magnets.

[0172] According to the above configuration, the magnetic force of the neodymium magnet is the strongest among the permanent magnets, so the magnet can be made smaller, thereby making the motor unit more compact.

[0173] In one or more embodiments, the stator body may include a plurality of teeth. The number of the plurality of magnets may be greater than the number of the plurality of teeth.

[0174] According to the above configuration, it is possible to suppress the occurrence of cogging during motor operation.

[0175] (First embodiment)

[0176] like Figure 1 As shown, the system 1 includes: a plurality of working units 4 and a motor unit 10. The motor unit 10 is a universal motor unit. The motor unit 10 is respectively installed in a detachable manner on the various working units 4. The motor unit 10 can also be replaced by installing the engine unit in the working unit 4 in a detachable manner. The engine unit is an interchangeable engine unit, for example, the engine unit of the GX120 sold by Honda R&D Co., Ltd. That is, the working unit 4 can be applied to both the motor unit 10 and the engine unit. The various working units 4 include, for example, a rammer 4a, a plate compactor 4b, a slope mower 4c, a trowel 4d, a concrete saw 4e, a reel mower 4f, an edger 4g, a dismantler 4h, a stump crusher 4i, a compressor 4j, a high-pressure cleaner 4k, a sprayer 4l, a sewage pump 4m, and a chemical sprayer 4n. In addition, the operation unit 4 is not limited to the above-mentioned operation unit 4, and may be an operation unit 4 other than the above-mentioned operation unit 4. For example, Figure 2 As shown in FIG. 1 , the motor unit 10 is detachably mounted on the tamping machine 4a. Figure 3 As shown in FIG. 1 , the motor unit 10 is detachably mounted on the plate compactor 4 b. Hereinafter, the configuration in which the motor unit 10 is mounted on the working unit 4 may be referred to as a working machine 2. The user uses the working machine 2 to perform work.

[0177] like Figure 4 As shown in FIG. 1 , the motor unit 10 is operated by the power of a plurality of (two in this embodiment) battery packs BP. Hereinafter, one battery pack BP is sometimes referred to as a first battery pack BP1, and the other battery pack BP is sometimes referred to as a second battery pack BP2. Fig.16 ) is referred to as the front-to-back direction, the direction perpendicular to the front-to-back direction is referred to as the left-right direction, and the direction perpendicular to the front-to-back direction and the left-right direction is referred to as the up-down direction. The front-to-back direction, the left-right direction, and the up-down direction are defined for the purpose of explaining the detailed structure of the motor unit 10. In the work machine 2 in which the motor unit 10 and the work unit 4 are combined, the front-to-back direction, the left-right direction, and the up-down direction of the work machine 2 are sometimes different from the front-to-back direction, the left-right direction, and the up-down direction of the motor unit 10.

[0178] like Figure 5As shown, in the motor unit 10 including a plurality of battery packs BP, the weight of the motor unit 10 is greater than 11.7 kg and less than 19 kg. The length of the motor unit 10 in the front-to-back direction is greater than 230 mm and less than 235 mm. In addition, the length in the front-to-back direction does not include the length of the motor shaft 140 exposed to the outside of the motor unit 10. The length of the motor unit 10 in the left-right direction is greater than 170 mm and less than 230 mm. The length of the motor unit 10 in the up-down direction is greater than 280 mm and less than 350 mm. The volume of the motor unit 10 is 9500 cm 3 Above and 13000cm 3 the following.

[0179] In the motor unit 10 that does not include a plurality of battery packs BP, the weight of the motor unit 10 is greater than 10.5 kg and less than 15 kg. The length of the motor unit 10 in the front-to-back direction is greater than 230 mm and less than 235 mm. In addition, the length in the front-to-back direction does not include the length of the motor shaft 140 exposed to the outside of the motor unit 10. The length of the motor unit 10 in the left-right direction is greater than 170 mm and less than 230 mm. The length of the motor unit 10 in the up-down direction is greater than 240 mm and less than 260 mm. The volume of the motor unit 10 is 8500 cm 3 Above and 10000cm 3 the following.

[0180] like Figure 4 as well as Figure 6 As shown in FIG. 1 , the motor unit 10 includes a main body housing 12. The main body housing 12 is made of, for example, a resin material. Figure 5 As shown, the weight of the main housing 12 is greater than 0.9 kg and less than 1.2 kg. The length of the main housing 12 in the front-to-back direction is greater than 220 mm and less than 225 mm. The length of the main housing 12 in the left-right direction is greater than 170 mm and less than 230 mm. The length of the main housing 12 in the up-down direction is greater than 220 mm and less than 240 mm. The volume of the main housing 12 is 8000 cm 3 Above and 9500cm 3 the following.

[0181] like Figure 4 as well as Figure 6 As shown, 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 divides the outer shape of the right half of the main body housing 12. The left main body housing 16 divides 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 connected by screws 17 (see Fig.12) and is fixed. The right main body shell 14 and the left main body shell 16 each have a shape obtained by dividing the main body shell 12 in half using a plane including the front-back direction and the up-down direction. The boundary between the right main body shell 14 and the left main body shell 16 is located at the center position in the left-right direction of the main body shell 12. A storage space 18 is divided between the right main body shell 14 and the left main body shell 16 (refer to Fig.13 ).

[0182] The main body case 12 includes a storage portion 20, a first battery mounting portion 22, and a second battery mounting portion 24. The storage portion 20 has a storage space 18 (see Fig.13 The housing portion 20 has a first opening 26 and a second opening 28. The first opening 26 is disposed on the front wall 20a of the housing portion 20. The first opening 26 has a substantially circular cross-sectional shape. The first opening 26 connects the housing space 18 with the outside of the main housing 12. Figure 6 As shown, the second opening 28 is disposed on the lower wall 20 b of the housing portion 20 . The second opening 28 has a substantially rectangular cross-sectional shape. The second opening 28 connects the housing space 18 and the outside of the main body housing 12 .

[0183] like Figure 7 As shown, the upper wall 20c of the housing portion 20 includes: a base 32, a first truncated pyramid portion 34, and a second truncated pyramid portion 36. The first truncated pyramid portion 34 protrudes upward from the base 32. The first truncated pyramid portion 34 has a quadrangular pyramid shape. The upper surface 34a of the first truncated pyramid portion 34 is arranged at a position further upward than the upper surface 32a of the base 32. The upper surface 32a and the upper surface 34a are respectively orthogonal to the up-down direction.

[0184] The second truncated pyramid portion 36 protrudes upward from the base portion 32. The second truncated pyramid portion 36 is connected to the rear end of the first truncated pyramid portion 34.

[0185] The first battery mounting portion 22 and the second battery mounting portion 24 are arranged 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 arranged 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 and the second battery mounting portion 24 do not overlap.

[0186] The first battery mounting portion 22 includes a first right rail portion 40, a first left rail portion 42, and a first connecting portion 44. The first right rail portion 40 and the first left rail portion 42 extend in the front-rear direction. The first right rail portion 40 extends upward from the upper surface 34a of the first pyramid portion 34 and then bends to extend toward the left. The first left rail portion 42 extends upward from the upper surface 34a of the first pyramid portion 34 and then bends to extend toward the right. The first left rail portion 42 is opposite to the first right rail portion 40 in the left-right direction. The first connecting portion 44 connects the front end of the first right rail portion 40 and the front end of the first left rail portion 42.

[0187] The second battery mounting portion 24 includes a second right rail portion 48, a second left rail portion 50, and a second connecting portion 52. The second right rail portion 48 and the second left rail portion 50 extend in the front-rear direction. The second right rail portion 48 extends upward from the upper surface 34a of the first pyramid portion 34 and then bends to extend toward the left. The first left rail portion 42 and the second right rail portion 48 are formed integrally. The second left rail portion 50 extends upward from the upper surface 34a of the first pyramid portion 34 and then bends to extend toward the right. The second left rail portion 50 and the second right rail portion 48 are opposite to each other in the left-right direction. The second connecting portion 52 connects the front end of the second right rail portion 48 and the front end of the second left rail portion 50.

[0188] like Figure 8 As shown, the first battery pack BP1 is mounted on the first battery mounting portion 22. The second battery pack BP2 is mounted on the second battery mounting portion 24. In this embodiment, the configuration of the first battery pack BP1 is the same as that of the second battery pack BP2. Therefore, the following description will be made taking the first battery pack BP1 as an example.

[0189] The first battery pack BP1 includes a secondary battery capable of charge and discharge, such as a lithium-ion battery. Figure 5 As shown, 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-to-back 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 top-to-bottom direction is 65 mm or more and 115 mm or less. The volume of the first battery pack BP1 is 500 cm 3 Over 1500cm 3 Below. Fig. 9As shown, the maximum voltage value of the first battery pack BP1 is greater than or equal to 40 V and less than or equal to 80 V. The rated capacity of the first battery pack BP1 is greater than or equal to 4 Ah and less than or equal to 40 Ah. In a modified example, the configuration (i.e., size, maximum voltage value, and rated capacity) of the first battery pack BP1 may be different from the configuration (i.e., size, maximum voltage value, and rated capacity) of the second battery pack BP2.

[0190] like Fig.10 As shown, the first battery pack BP1 includes a battery case 56, a hook 58, a right battery rail 60, and a left battery rail 62. The battery case 56 accommodates chargeable and dischargeable secondary battery cells, such as lithium ion battery cells, therein.

[0191] The hook portion 58 is movably mounted on the lower surface 56a of the battery case 56. The hook portion 58 includes: an engaging portion 64 and an operating portion 66. The engaging portion 64 is, for example, an engaging claw. The engaging portion 64 usually protrudes to the outside of the battery case 56. When the operating portion 66 is pressed into the battery case 56, the engaging portion 64 as a whole moves into the inside of the battery case 56.

[0192] The right battery rail 60 and the left battery rail 62 protrude from the lower surface 56a of the battery case 56. The right battery rail 60 and the left battery rail 62 extend in the front-rear direction. The right battery rail 60 and the left battery rail 62 are arranged in the left-right direction. In the left-right direction, the engaging portion 64 is arranged 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 case 56, then bends and extends toward the right. The left battery rail 62 extends downward from the lower surface 56a of the battery case 56, then bends and extends toward the left.

[0193] like Fig.11 As shown in FIG. 1 , when the first battery pack BP1 is slid along the mounting direction D1, the first battery pack BP1 is supported by the first right rail portion 40 (see FIG. 1 ). Figure 7 ) and the first left rail portion 42 (refer to Figure 7 ) is guided to slide on the upper surface 34a of the first truncated pyramid portion 34. The installation direction D1 is the forward direction. At this time, the right battery rail 60 (refer to Fig.10 ) is slidably engaged with the first right rail portion 40, and the left battery rail 62 (refer to 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 pressed into the interior of the battery case 56 through the upper surface 34a. A groove 34b recessed from the upper surface 34a is formed on the upper surface 34a. When the engaging portion 64 reaches the groove 34b, it flies out from the interior of the battery case 56 to the outside and engages with the upper surface 34a in the groove 34b. Thus, the first battery pack BP1 is mounted on the first battery mounting portion 22. When the first battery pack BP1 is slid along the removal direction D2 in order to pull the engaging portion 64 out of the groove 34b while the operation portion 66 is pressed in, 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 rearward direction. Although not shown in the figure, the mounting direction of the second battery pack BP2 to the second battery mounting portion 24 is the same as the mounting direction D1. The removal direction of the second battery pack BP2 from the second battery mounting portion 24 is the same as the removal direction D2.

[0194] like Figure 8 As shown, when the first battery pack BP1 is mounted on the first battery mounting portion 22 and the second battery pack BP2 is mounted on the second battery mounting portion 24, the lower surface 56a of the battery case 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 case 56 of the second battery pack BP2 abuts against the second battery mounting portion 24 from above. The left surface 56b of the battery case 56 of the first battery pack BP1 is opposite to the right surface 56c of the battery case 56 of the second battery pack BP2 in the left-right direction. The left surface 56b of the battery case 56 of the first battery pack BP1 and the right surface 56c of the battery case 56 of the second battery pack BP2 are substantially parallel. The wall portion including the storage portion 20 is not disposed between the left surface 56b of the battery case 56 of the first battery pack BP1 and the right surface 56c of the battery case 56 of the second battery pack BP2. The distance between the left surface 56b of the battery case 56 of the first battery pack BP1 and the right surface 56c of the battery case 56 of the second battery pack BP2 is 175 mm or less. In a modified example, the distance between the left surface 56b of the battery case 56 of the first battery pack BP1 and the right surface 56c of the battery case 56 of the second battery pack BP2 may be 350 mm or less.

[0195] like Figure 7As shown, the motor unit 10 includes a first battery connection terminal 70, a second battery connection terminal 72, a main power switch 74, a display panel 76, an operation switch 78a, and a speed change switch 78b. The first battery connection terminal 70 and the second battery connection terminal 72 are arranged on the upper surface 34a of the first truncated pyramid portion 34. The first battery connection terminal 70 is surrounded by the first battery mounting portion 22. The first battery connection terminal 70 includes a plurality of first terminal members 79. When the first battery pack BP1 is mounted on the first battery mounting portion 22, the first terminal member 79 is electrically connected to a terminal member (not shown) of the first battery pack BP1.

[0196] The second battery joint end 72 is surrounded by the second battery mounting portion 24. The second battery joint end 72 includes a plurality of second terminal members 80. When the second battery pack BP2 is mounted on the second battery mounting portion 24, the second terminal member 80 is electrically connected to a terminal member (not shown) of the second battery pack BP2. In the present embodiment, when the first battery pack BP1 is mounted on the first battery mounting portion 22 and the second battery pack BP2 is mounted on 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 member 80 may be electrically connected in parallel to the first terminal member 79.

[0197] The main power switch 74 and the display panel 76 are arranged on the second pyramid portion 36. The main power switch 74 switches the on state and the off state of the motor unit 10. The display panel 76 lights up when the motor unit 10 is in the on state.

[0198] The action switch 78a is arranged on the rear side of the main power switch 74 and the display panel 76. The action switch 78a is a rocker switch. When the right part of the action switch 78a is pressed into the main housing 12, the left part of the action switch 78a pops out from the main housing 12, and when the left part of the action switch 78a is pressed into the main housing 12, the right part of the action switch 78a pops out from the main housing 12. When the motor unit 10 is in the on state, once the left part of the action switch 78a is pressed into the main housing 12, the motor unit 10 will operate. When the motor unit 10 is operating, once the right part of the action switch 78a is pressed into the main housing 12, the motor unit 10 will stop.

[0199] The rotation speed changing switch 78b is arranged on the second truncated pyramid portion 36. The rotation speed changing switch 78b is arranged on the left side of the display panel 76. The rotation speed changing switch 78b changes the rotation speed of a motor 86 described later.

[0200] like Fig.12 As shown, the motor unit 10 includes a motor housing 84 and a motor 86 (see Fig.16 )、Fan 88 (refer to Fig.16 ), the fixing unit 90, the plate member 92, the vibration-proof part 94 (refer to Fig.18 as well as Fig.19 )、right cover member 96、left cover member 98、support unit 100、control unit 102 (refer to Fig.25 ), and the cylindrical vibration-proof member 104 (refer to Fig.25 ).

[0201] like Fig.13 As shown, the motor housing 84 is surrounded by the housing portion 20. The housing portion 20 is arranged outside the motor housing 84. The motor housing 84 houses a motor 86 and a fan 88 therein. The motor housing 84 includes a motor housing body 108, a front bracket 110, and a rear bracket 112.

[0202] The motor housing body 108 includes a cylindrical portion 114, a partition wall portion 116, and a screw boss portion 118 (see Fig.14 ), and a foot portion 120. The cylinder portion 114 has a cylindrical shape. The partition wall portion 116 extends radially inward from the inner surface of the cylinder portion 114 toward the center of the cylinder portion 114. Fig.14 As shown in FIG. 1 , the screw boss portion 118 protrudes upward from the upper portion of the barrel portion 114. The foot portion 120 protrudes downward from the lower portion of the barrel portion 114. Fig.13 As shown, the leg portion 120 passes through the second opening 28 .

[0203] The front bracket 110 is screwed by screws 121 (see Fig.14 ) and is fixed to the front end of the motor housing body 108. The motor housing space 122 is divided by the front bracket 110, the cylinder 114, and the front surface of the partition wall 116. The front bracket 110 passes through the first opening 26 of the main housing 12. The front bracket 110 is separated from the outer edge of the first opening 26. The air intake port 26a is divided by the front bracket 110 and the outer edge of the first opening 26. The air intake port 26a is a part of the first opening 26. The air intake port 26a connects the housing space 18 of the main housing 12 with the outside of the main housing 12. As shown in FIG. Fig.15 As shown, 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 connects the motor housing space 122 with the outside of the motor housing 84.

[0204] like Fig.16 As shown, the rear bracket 112 is connected by screws 125 (see Fig.14) and is fixed to the rear end of the motor housing body 108. The fan accommodation space 126 is divided by the rear surface of the rear bracket 112, the cylinder 114, and the partition wall 116. The rear bracket 112 has a motor air intake port 128. The rear bracket 112 penetrates the motor air intake port 128 in the front-to-back direction. The motor air intake port 128 connects the fan accommodation space 126 with the outside of the motor housing 84.

[0205] The motor 86 is disposed in the motor housing space 122. The motor 86 is, for example, a DC motor. In a modified example, the motor 86 may also 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. When the motor unit 10 is in the on state, the action switch 78a (see Figure 7 ) is pressed into the main body housing 12, the motor 86 is activated. The motor 86 is activated by the power supplied from the battery pack BP.

[0206] like Figure 5 As shown, the weight of the motor 86 is greater than 2 kg and less than 3 kg. The length of the motor 86 in the front-to-back direction is greater than 140 mm and less than 145 mm. The volume of the motor 86 is 650 cm 3 Over 750cm 3 The diameter of the motor 86 is greater than 80 mm and less than 145 mm. Fig. 9 As shown, the maximum output value of motor 86 is greater than or equal to 1.5 kW and less than or equal to 4 kW. In a modified example, the maximum output value of motor 86 may be greater than or equal to 1.5 kW and less than or equal to 3 kW, or may be greater than or equal to 1.5 kW and less than or equal to 2.35 kW. The maximum current value of motor 86 is greater than or equal to 15 A and less than or equal to 70 A. The torque of motor 86 is greater than or equal to 2 N·m and less than or equal to 11 N·m. In a modified example, the torque of motor 86 may be greater than or equal to 3 N·m and less than or equal to 8 N·m. The rotation speed of motor 86 is greater than or equal to 3000 rpm and less than or equal to 4300 rpm.

[0207] like Fig.16 As shown, 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 arranged to surround the outer peripheral 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.

[0208] The motor shaft 140 is fixed to the outer rotor body 136. When the motor unit 10 is placed on the placement surface P1, the motor shaft 140 extends along the placement surface P1. The motor shaft 140 passes through the stator body 132. The motor shaft 140 passes through the partition wall 116. The motor shaft 140 is rotatably supported by the partition wall 116 via a bearing 142. The motor shaft 140 passes through 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 the central axis 140a.

[0209] The fan 88 is fixed to the rear end of the motor shaft 140. The fan 88 is arranged in the fan accommodation space 126. In this embodiment, the fan 88 is a centrifugal fan. In a modified example, the fan 88 may also be an axial flow fan. The fan 88 rotates integrally with the motor shaft 140.

[0210] 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 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 substantially 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 operation unit 4 (see Figure 3 ).

[0211] like Fig.13 As shown, the first fixing portion 148 is arranged on the lower side of the motor 86. The motor 86 is arranged between the first fixing portion 148 and the first battery mounting portion 22. In addition, the motor 86 is arranged between the first fixing portion 148 and the second battery mounting portion 24 (see Fig.12 )between.

[0212] like Fig.16 As shown, the second fixing portion 150 is formed on the front bracket 110. The second fixing portion 150 has a second fixing surface 150a. The second fixing surface 150a corresponds to the front surface of the second fixing portion 150. When the motor unit 10 is placed on the placement surface P1, the second fixing surface 150a is orthogonal to the placement surface P1. The second fixing surface 150a is substantially orthogonal to the first fixing surface 148a. The second fixing surface 150a is substantially orthogonal to the motor shaft 140. The second fixing surface 150a is fixed to the operation unit 4 (refer to Figure 2 ). The type of the operation unit 4 fixed to the second fixing surface 150a is different from the type of the operation unit 4 fixed to the first fixing surface 148a.

[0213] like Fig.17As shown, 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 screws 155. The plate body 154 is opposed to the upper portion, the right portion, and the left portion of the cylinder portion 114.

[0214] like Fig.18 as well as Fig.19 As shown, 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 shape of the second right sleeve 158, the shape of the third right sleeve 160, the shape of the first left sleeve 162, the shape of the second left sleeve 164, and the shape of the third left sleeve 166 are the same as the shape of the first right sleeve 156.

[0215] like Fig.18 As shown, the first right sleeve 156, the second right sleeve 158, and the third right sleeve 160 protrude toward the right from the right wall 154a of the plate body 154. The first right sleeve 156 is arranged at the lower part of the right wall 154a. The second right sleeve 158 is arranged at the front upper part of the right wall 154a. The third right sleeve 160 is arranged at the rear upper part of the right wall 154a.

[0216] like Fig. 20 As shown, the first right sleeve 156 is arranged at a position lower than the central axis 140a of the motor shaft 140. The second right sleeve 158 and the third right sleeve 160 are arranged at a position higher than 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-back direction, the first right sleeve 156 is arranged at 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.

[0217] like Fig.19As shown, the first left sleeve 162, the second left sleeve 164, and the third left sleeve 166 protrude toward the left from the left wall 154b of the plate body 154. The position of the first left sleeve 162 in the up-down direction and the front-to-back direction is substantially the same as the position of the first right sleeve 156 in the up-down direction and the front-to-back direction. The position of the second left sleeve 164 in the up-down direction and the front-to-back direction is substantially the same as the position of the second right sleeve 158 in the up-down direction and the front-to-back direction. The position of the third left sleeve 166 in the up-down direction and the front-to-back direction is substantially the same as the position of the third right sleeve 160 in the up-down direction and the front-to-back direction. As shown in FIG. Fig.21 As shown, 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. In addition, the distance between the first left sleeve 162 and the second left sleeve 164 is substantially the same as the distance between the first right sleeve 156 (refer to Fig. 20 ) and the second right sleeve 158 (refer to Fig. 20 ) are approximately the same distance apart.

[0218] like Fig.18 as well as Fig.19 As shown, the vibration-proof part 94 includes: a first right vibration-proof component 170, a second right vibration-proof component 172, a third right vibration-proof component 174, a first left vibration-proof component 176, a second left vibration-proof component 178, and a third left vibration-proof component 180. The first right vibration-proof component 170 has a cylindrical shape. The first right vibration-proof component 170 is made of an elastic material. The first right vibration-proof component 170 is made of, for example, foam, a rubber material, a thermoplastic elastomer material, or a thermosetting elastomer material. The shape of the second right vibration-proof component 172, the shape of the third right vibration-proof component 174, the shape of the first left vibration-proof component 176, the shape of the second left vibration-proof component 178, and the shape of the third left vibration-proof component 180 are the same as the shape of the first right vibration-proof component 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 .

[0219] like Fig.18As shown, the first right sleeve 156 is inserted into the opening 170a of the first right vibration-proofing component 170. The second right sleeve 158 is inserted into the opening 172a of the second right vibration-proofing component 172. The third right sleeve 160 is inserted into the opening 174a of the third right vibration-proofing component 174. When the first right vibration-proofing component 170 abuts against the right wall 154a of the plate body 154, it protrudes further to the right than the first right sleeve 156. When the second right vibration-proofing component 172 abuts against the right wall 154a of the plate body 154, it protrudes further to the right than the second right sleeve 158. When the third right vibration-proofing component 174 abuts against the right wall 154a of the plate body 154, it protrudes further to the right than the third right sleeve 160. As shown in FIG. Fig. 20 As shown, the first right vibration-proofing member 170 is arranged at a position lower than 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 installed. The second right vibration-proofing member 172 and the third right vibration-proofing member 174 are arranged at a position higher than the center of gravity G1 of the motor unit 10. The distance between the first right vibration-proofing member 170 and the second right vibration-proofing member 172 is substantially the same as the distance between the second right vibration-proofing member 172 and the third right vibration-proofing member 174, and the distance between the third right vibration-proofing member 174 and the first right vibration-proofing member 170. In the front-to-back direction, the center position of the first right vibration-proofing member 170 is substantially the same as the position of the center of gravity G1 of the motor unit 10.

[0220] like Fig.19 As shown, the first left sleeve 162 is inserted into the opening 176a of the first left vibration-proof member 176. The first left vibration-proof member 176 is arranged at a position lower than 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-proof member 178. The third left sleeve 166 is inserted into the opening 180a of the third left vibration-proof member 180. The second left vibration-proof member 178 and the third left vibration-proof member 180 are arranged at a position higher than the center of gravity G1 of the motor unit 10. When the first left vibration-proof member 176 abuts against the left wall 154b of the plate body 154, it protrudes further to the left than the first left sleeve 162. When the second left vibration-proof member 178 abuts against the left wall 154b of the plate body 154, it protrudes further to the left than the second left sleeve 164. When the third left vibration-proof member 180 abuts against the left wall 154b of the plate body 154, it protrudes further to the left than the third left sleeve 166. Fig.21 As shown, the distance between the first left vibration-proofing member 176 and the second left vibration-proofing member 178 is substantially the same as the distance between the second left vibration-proofing member 178 and the third left vibration-proofing member 180, and the distance between the third left vibration-proofing member 180 and the first left vibration-proofing member 176. In addition, the distance between the first left vibration-proofing member 176 and the second left vibration-proofing member 178 is substantially the same as the distance between the first right vibration-proofing member 170 (see Fig. 20 ) and the second right vibration-proof member 172 (refer to Fig. 20 In the front-rear direction, the center position of the first left vibration-isolating member 176 and the position of the center of gravity G1 of the motor unit 10 are substantially the same.

[0221] like Fig. 22 As shown in FIG. 1 , 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 arranged at a position lower than the upper end 86a of the motor 86. The upper end 86a of the motor 86 and the upper end of the outer rotor body 136 are substantially the same. Figure 20 to Figure 23 In FIG, the position of the upper end 86a of the motor 86 in the vertical direction is illustrated by a dotted line. The first right vibration-proofing component 170 and the first left vibration-proofing component 176 are arranged at a position lower than the central axis 140a of the motor shaft 140. The first right vibration-proofing component 170 and the first left vibration-proofing component 176 are arranged at a position higher than the lower end 86b of the motor 86. The lower end 86b of the motor 86 is substantially the same as the lower end of the outer rotor body 136. Figure 20 to Figure 23 In the figure, the position of the lower end 86b of the motor 86 in the up-down direction is illustrated by a dashed line. The orthogonal plane P2 is orthogonal to the mounting plane P1, and the first right vibration isolation component 170 is configured to be plane-symmetrical with the first left vibration isolation component 176 relative to the orthogonal plane P2 including the central axis 140a of the motor shaft 140 (i.e., the front-to-back direction). The distance between the first right vibration isolation component 170 and the orthogonal plane P2 and the distance between the first left vibration isolation component 176 and the orthogonal plane P2 are substantially the same. When the motor unit 10 is observed in the front-to-back direction, the motor 86 and the fan 88 are arranged between the first right vibration isolation component 170 and the first left vibration isolation component 176. When the motor unit 10 is observed in the left-to-right direction, the motor 86 and the fan 88 are at least partially adjacent to the first right vibration isolation component 170 and the first left vibration isolation component 176, respectively (refer to Fig.21 )coincide.

[0222] like Fig.23As shown, when the motor unit 10 is placed on the placement surface P1, the second right vibration isolation member 172 and the second left vibration isolation member 178 are arranged at a position more upward than the lower end 86b of the motor 86. The second right vibration isolation member 172 and the second left vibration isolation member 178 are arranged at a position more upward than the central axis 140a of the motor shaft 140. The center of the second right vibration isolation member 172 in the vertical direction and the center of the second left vibration isolation member 178 in the vertical direction are arranged at a position more downward than the upper end 86a of the motor 86. The upper end of the second right vibration isolation member 172 and the upper end of the second left vibration isolation member 178 are arranged at a position more upward than the upper end 86a of the motor 86. The second right vibration isolation member 172 is arranged to be plane-symmetrical with the second left vibration isolation member 178 with respect to the orthogonal plane P2. The distance between the second right vibration-proofing member 172 and the orthogonal plane P2 is substantially the same as the distance between the second left vibration-proofing member 178 and the orthogonal plane P2. Fig. 22 ) is 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 entirety of the second right vibration isolating member 172 and the third right vibration isolating member 174 (see Fig. 20 ) are overlapped as a whole, and the whole of the second left vibration-isolating component 178 overlaps with the third left vibration-isolating component 180 (refer to Fig.21 ) as a whole. The third right vibration-proofing component 174 is arranged to be plane-symmetrical with the third left vibration-proofing component 180 relative to the orthogonal plane P2. In addition, when the motor unit 10 is observed in the front-to-back direction, the motor 86 and the fan 88 are arranged between the third right vibration-proofing component 174 and the third left vibration-proofing component 180.

[0223] 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 ). Fig. 20 As shown, the second right vibration-proofing member 172 and the second left vibration-proofing member 178 are arranged at a position closer to the front side than the fan 88. In addition, the third right vibration-proofing member 174 and the third left vibration-proofing member 180 (see Fig.21 ) is arranged at a position further to the rear than the fan 88.

[0224] like Fig.18As shown, the right cover member 96 is arranged on the right side of the right wall 154a of the plate body 154. The first right vibration-proofing member 170, the second right vibration-proofing member 172, and the third right vibration-proofing 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 by means of the first right vibration-proofing member 170, the second right vibration-proofing member 172, and the third right vibration-proofing member 174. The right cover member 96 does not abut against the plate member 92. Fig.12 As shown, 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. Fig.18 ), second right anti-vibration member 172 (refer to Fig.18 ), and the third right vibration-isolating member 174 (refer to Fig.18 ) is prevented from detaching from the plate member 92.

[0225] like Fig.19 As shown, the left cover member 98 is arranged on the left side of the left wall 154b of the plate body 154. The first left vibration-proof member 176, the second left vibration-proof member 178, and the third left vibration-proof 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 by means of the first left vibration-proof member 176, the second left vibration-proof member 178, and the third left vibration-proof member 180. The left cover member 98 does not abut against the plate member 92. Fig.12 As shown, the left cover member 98 is disposed between the left main body shell 16 and the left wall 154b of the plate body 154. The left cover member 98 is fixed to the left main body shell 16. Fig.19 ), second left anti-vibration member 178 (refer to Fig.19 ), and the third left vibration-proof member 180 (refer to Fig.19 ) is prevented from detaching from the plate member 92.

[0226] like Fig.24 As shown, 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.

[0227] 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 arranged at the right end of the upper wall 184a. The two right positioning holes 185a are arranged in the front-to-back direction. The left positioning hole 185b penetrates the upper wall 184a in the up-down direction. The left positioning hole 185b is arranged at the left end of the upper wall 184a. The two left positioning holes 185b are arranged in the front-to-back direction.

[0228] The right cover member 96 includes two right positioning protrusions 96a protruding upward, and the right positioning hole 185a receives the right positioning protrusion 96a. The left cover member 98 includes two left positioning protrusions 98a protruding upward, and the left positioning hole 185b receives the left positioning protrusion 98a. Thus, the support plate 184 is positioned 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 the screw 185c. The support plate 184 is fixed to the left cover member 98 by the screw 185d.

[0229] like Fig. 22 As shown, the right wall 184b is sandwiched between the right surface of the right cover member 96 and the right main body shell 14. The right wall 184b, the right cover member 96, and the right main body shell 14 are fixed to each other by screws 186. The left wall 184c is sandwiched between the left surface of the left cover member 98 and the left main body shell 16. The left wall 184c, the left cover member 98, and the left main body shell 16 are fixed to each other by screws 188.

[0230] like Fig.25 As shown, the control unit 102 is arranged on the rear side of the motor housing 84. The control unit 102 is arranged on the main body housing 12 (see Figure 4 ) inside. The control unit 102 includes: a substrate housing 192, a filter component 194 (see Fig.26 )、Control circuit board 196 (refer to Fig.26 ), and substrate housing 197 (refer to Fig.26 ). The substrate housing 192 includes an outer housing portion 198 and an inner housing portion 199 (see Fig.26 The outer shell portion 198 defines the outer shape of the control unit 102. The outer shell portion 198 is fixed to the rear end of the support plate 184 by screws 190. Fig.26 As shown, the outer housing part 198 has an inner space 200 therein. In addition, the outer housing part 198 has an air inlet port 202. The air inlet port 202 is located at a rear position of the outer housing part 198. The air inlet port 202 connects the inner space 200 with the outside of the substrate housing 192.

[0231] The inner housing part 199 is arranged in the internal space 200. The inner housing part 199 is arranged in front of the air inlet port 202. The inner housing part 199 is fixed to the outer housing part 198. The inner housing part 199 has a substrate housing space 203 inside.

[0232] The filter component 194 is arranged in the internal space 200. The filter component 194 is arranged in front of the air inlet port 202. The filter component 194 blocks the air inlet port 202. The filter component 194 has fine ventilation holes (not shown) inside. The filter component 194 is made of, for example, a filter material or a foam material. The air flows to the filter component 194 through the ventilation holes. When the air flows through the ventilation holes, the filter component 194 can remove foreign matter such as dust flowing with the air from the air.

[0233] The control circuit substrate 196 is arranged in the substrate accommodating space 203. The control circuit substrate 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 substrate 196 is arranged along a surface, and the surface is a surface along the up-down direction and the left-right direction. The control circuit substrate 196 is arranged on the front side of the air intake port 202. The control circuit substrate 196 is arranged on the rear side of the motor air intake port 128 of the rear bracket 112. The control circuit substrate 196 controls the motor 86 (refer to Fig.13 ) to control. Fig.13 As shown, the control circuit board 196 is arranged on the central axis 140a of the motor shaft 140. The control circuit board 196 is arranged on the rear side of the fan 88. When the motor unit 10 is viewed in the front-to-back direction, the control circuit board 196 at least partially overlaps with the motor 86 and the fan 88. The motor 86, the fan 88, and the control circuit board 196 are arranged in a row in the front-to-back direction.

[0234] like Fig.26 As shown, the substrate housing 197 is arranged in the substrate accommodating space 203. The substrate housing 197 is arranged in front of the air inlet port 202. The substrate housing 197 is arranged between the control circuit substrate 196 and the air inlet port 202. The substrate housing 197 supports the control circuit substrate 196. The control circuit substrate 196 is arranged inside the substrate housing 197. The substrate housing 197 is fixed to the inner shell part 199. The substrate housing 197 has a heat sink 204. The heat sink 204 has a flat plate shape extending in the up-down direction and the front-back direction. The inner shell part 199 has a through hole 199a that passes through the rear end of the inner shell part 199, and the heat sink 204 passes through the through hole 199a. The heat sink 204 is opposite to the air inlet port 202 in the front-back direction.

[0235] The cylindrical vibration-isolating member 104 is disposed on the front side of the substrate housing 192 and the rear side of the rear bracket 112. The cylindrical vibration-isolating member 104 is made of an elastic material. The material of the cylindrical vibration-isolating member 104 and the first right vibration-isolating member 170 (see Fig.18 ) are made of the same material. The cylindrical vibration-proof component 104 has a cylindrical shape. Here, the cylindrical shape includes: a corrugated shape with a circular cross-section. The cylindrical vibration-proof component 104 has an air passage 208 inside. The cylindrical vibration-proof component 104 is fixed to the front end of the substrate housing 192 and the rear end of the rear bracket 112, respectively. The front end of the substrate housing 192 is open, and the cylindrical vibration-proof component 104 surrounds the front end of the substrate housing 192. The air passage 208 is connected to the internal space 200 via the front end of the substrate housing 192. The cylindrical vibration-proof component 104 surrounds the motor air intake port 128 of the rear bracket 112. The air passage 208 is connected to the fan housing space 126 via the motor air intake port 128. As Fig.13 As shown, when the motor unit 10 is viewed in the front-rear direction, the air passage 208 at least partially overlaps with the motor 86 and the fan 88, respectively.

[0236] The control circuit board 196 controls so that when the motor 86 is operated, the motor shaft 140 rotates and the fan 88 rotates. Fig.15 As shown, the air passes through the air inlet 26a and flows from the outside of the motor unit 10 into the storage space 18 of the main housing 12. In addition, in the drawings, the arrow line marked with the symbol F1 indicates the air flow direction. The inflowing air flows to the rear 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 housing 12.

[0237] like Fig.26 As shown, after the air flows around the outer shell portion 198, it passes through the air intake port 202 and flows into the internal space 200. The inflowing air passes through the filter component 194 and flows upward along the heat sink 204 between the outer shell portion 198 and the inner shell portion 199. Since the air passes through the filter component 194, foreign matter flowing with the air can be removed from the air. In addition, the control circuit substrate 196 is cooled by the air flowing along the heat sink 204. Next, the air flows forward between the outer shell portion 198 and the inner shell portion 199, passes through the air passage 208 of the cylindrical vibration-proof component 104 and the motor air intake port 128 of the rear bracket 112, and flows from the internal space 200 into the fan housing space 126.

[0238] like Fig.15As shown, the air flowing into the fan housing space 126 is sent in a direction away from the central axis 140a (radially outward of the fan 88) by the fan 88. Next, the air flows from the fan housing space 126 into the motor housing space 122. The air flowing into the motor housing space 122 flows forward inside and outside the motor 86. Accordingly, the motor 86 is cooled. Thereafter, the air passes through the exhaust port 124 of the front bracket 110 and is discharged from the motor housing space 122 to the outside of the motor unit 10.

[0239] like Figure 2 , Figure 3 ,as well as Figures 27 to 33 As shown, the motor unit 10 can be applied to various working units 4. Figure 2 , Figure 3 ,as well as Figures 27 to 33 In the description, the coordinate system is changed to a coordinate system different from the coordinate system related to the above-mentioned motor unit 10. Specifically, the direction perpendicular to the mounting surface P1 is called the up-down direction, the direction perpendicular to the up-down direction is called the front-back direction, and the direction perpendicular to the up-down direction and the front-back direction is called the left-right direction.

[0240] like Fig. 27 As shown, the motor unit 10 can be mounted on the rammer 4a. The rammer 4a is a ground compacting 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 upper rear portion. The fixing base 308 is fixed to the second fixing surface 150a of the motor unit 10.

[0241] Before describing the detailed structure of the fixing table 308, the detailed structure of the second fixing portion 150 of the motor unit 10 will be described. Fig.28 As shown, the second fixing portion 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 holes 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 holes 150e is the same as the arrangement of the plurality of holes of the engine unit that can be mounted on the rammer 4a. Thus, the second fixing portion 150 can be fixed to the working unit 4 to which the engine unit can be mounted, and the motor unit 10 can be used.

[0242] The two positioning holes 150b are each separated by a certain distance from the central axis 140a of the motor shaft 140. The two positioning holes 150b are arranged around the central axis 140a at an interval of 180 degrees. The two positioning holes 150b are arranged on the orthogonal plane P2.

[0243] The four first fixing holes 150c are each separated from the central axis 140a by a certain distance. The four first fixing holes 150c are arranged around the central axis 140a at intervals of 90 degrees. The distance between the first fixing holes 150c and the central axis 140a is only slightly shorter than the distance between the positioning hole 150b and the central axis 140a. Two first fixing holes 150c are arranged at positions closer to the right than the orthogonal plane P2, and the remaining two first fixing holes 150c are arranged at positions closer to the left than the orthogonal plane P2.

[0244] The four second fixing holes 150d are each separated from the central axis 140a by a certain distance. 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 second fixing holes 150d are arranged at a position closer to the right than the orthogonal plane P2, and the remaining two second fixing holes 150d are arranged at a position closer to the left than the orthogonal plane P2. The auxiliary hole 150e is slightly separated from the central axis 140a relative to the second fixing hole 150d.

[0245] like Fig.29 As shown, 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 portion 150.

[0246] like Fig.29 as well as Fig.30 As shown, when the second fixing portion 150 is fixed to the fixing table 308, first, two positioning pins 309a are respectively inserted into each positioning hole 308a, and then inserted into each positioning hole 150b. Accordingly, the second fixing portion 150 is positioned relative to the fixing table 308. As a result, the fixing hole 308b is opposite to the second fixing hole 150d. Next, four screws 309b are respectively inserted into each fixing hole 308b so as to be screwed into the second fixing hole 150d. Accordingly, the second fixing portion 150 is fixed to the fixing table 308 in a state where it is positioned relative to the fixing table 308. When the second fixing portion 150 is fixed to the fixing table 308, the motor shaft 140 of the motor unit 10 protrudes from the main body housing 12 toward the front lower side.

[0247] like Figure 2As shown, the handle unit 302 includes: a first handle 310, a second handle 312, and a third handle 314. The first handle 310 extends from the upper end of the upper housing 300 toward the rear, then bends and extends toward the right, and then bends and extends toward the front. The first handle 310 surrounds the motor unit 10. The second handle 312 extends from the upper end of the upper housing 300 toward the upper side, then bends and extends toward the right, and then bends and extends toward the lower side. The third handle 314 extends from the upper end of the upper housing 300 toward the lower side of the front, then bends and extends toward the right, and then bends and extends toward the upper side of the rear. The first handle 310, the second handle 312, and the third handle 314 are formed as a whole. At least one of the first handle 310, the second handle 312, and the third handle 314 is held by the user during operation.

[0248] like Fig. 27 As shown, the working unit 304 includes: a telescopic unit 320, a ground leveling unit 322, a bearing connection unit 324, and a driving unit 326. The telescopic unit 320 is fixed to the lower part of the upper housing 300. The telescopic unit 320 can be telescopic. The ground leveling unit 322 is arranged on the lower side of the upper housing 300. The upper part of the ground leveling unit 322 is surrounded by the telescopic unit 320. The ground leveling unit 322 is fixed to the telescopic unit 320. The ground leveling unit 322 includes a ground leveling floor 328 located at the lower end position. The ground leveling floor 328 is in surface contact with the placement surface P1.

[0249] The bearing connection part 324 and the driving part 326 are arranged inside the upper housing 300. The bearing connection part 324 is fixed to the motor shaft 140 of the motor unit 10. The driving part 326 is fixed to the bearing connection part 324. When the motor shaft 140 rotates, the driving part 326 causes the leveling part 322 to operate. Accordingly, the separation action of causing the leveling part 322 to leave the placement surface P1 and the approach action of causing the leveling part 322 to approach the placement surface P1 are repeatedly performed. The leveling floor 328 is repeatedly pressed against the placement surface P1, so that the placement surface P1 such as the ground is compacted.

[0250] like Fig.31 As shown, the motor unit 10 can be mounted on the plate compactor 4b. The plate compactor 4b is a ground compacting device that compacts the ground. The force used by the plate compactor 4b to compact the ground is smaller than the force used by the tamping machine 4a to compact the ground. The plate compactor 4b includes a base 350, a handle unit 352, a transmission device 354, and a working unit 356.

[0251] The base 350 includes a fixing base 360 ​​. The fixing base 360 ​​is fixed to the first fixing surface 148 a of the motor unit 10 .

[0252] Before describing the detailed structure of the fixing table 360, the detailed structure of the first fixing portion 148 of the motor unit 10 will be described. Fig.32 As shown, 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 and 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 mounted on the plate compactor 4b. In addition, the first fixing surface 148a is aligned with the central axis 140a of the motor shaft 140 (refer to Fig.28 ) between the first fixing portion 148 and the first fixing portion 148. Thus, the first fixing portion 148 can be fixed to the operating unit 4 to which the engine unit can be mounted to use the motor unit 10.

[0253] The first positioning hole 148b and the second positioning hole 148c are arranged at the front end of the first fixing portion 148. The first positioning hole 148b and the second positioning hole 148c are arranged in the left-right direction. The first positioning hole 148b is a round hole. The second positioning hole 148c is a long hole extending in the left-right direction.

[0254] The first fixing hole 148d and the second fixing hole 148e are arranged at the rear end of the first fixing portion 148. The first fixing hole 148d and the second fixing hole 148e are arranged in the left-right direction. The first fixing hole 148d and the first positioning hole 148b are arranged in the front-back 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 arranged in the front-back direction. The shape of the second fixing hole 148e is substantially the same as the shape of the second positioning hole 148c.

[0255] The fixing platform 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 the upper surface 360a of the fixing platform 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 arranged in the left-right direction.

[0256] The first fixing hole 361c and the second fixing hole 361d are arranged in the left-right direction. The first fixing hole 361c and the first positioning protrusion 361a are arranged in the front-back direction. The second fixing hole 361d and the second positioning protrusion 361b are arranged in the front-back direction.

[0257] 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 arranged 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 arranged at the lower end of the second long hole portion 361d1.

[0258] When the first fixing portion 148 is fixed to the fixing table 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. Accordingly, the first fixing portion 148 is positioned relative to the fixing table 360. In addition, since the second positioning hole 148c is a long hole, even if the distance between the first positioning protrusion 361a and the second positioning protrusion 361b is different for each product, the first fixing portion 148 can be positioned relative to the fixing table 360. Next, the screw 362a is inserted from the upper side of the first fixing portion 148 into the first fixing hole 361c and the first long hole portion 361c1, so that it is screwed into the first round hole portion 361c2. Next, the screw 362a is inserted into the second fixing hole 361d and the second long hole portion 361d1 from the upper side of the first fixing portion 148 so as to be 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. Accordingly, the first fixing portion 148 is fixed to the upper surface 360a of the fixing table 360 ​​in a state where it is positioned relative to the fixing table 360. When the first fixing portion 148 is fixed to the fixing table 360, the motor shaft 140 of the motor unit 10 extends in the left-right direction.

[0259] like Figure 3 As shown, 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 toward the upper rear side, then bends and extends toward the right side, and then bends and extends toward the lower front side. The first handle 364 is arranged at the rear side of the motor unit 10. The user holds the first handle 364 during operation.

[0260] The second handle 366 extends upward from the rear end of the base 350, then bends and extends toward the upper front side, then bends and extends toward the front, and then bends and extends downward. The second handle 366 is arranged to surround the motor unit 10. For example, when picking up the plate compactor 4b, the user holds the second handle 366.

[0261] like Fig.31As shown, 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 arranged at a position closer to the front side than the first pulley 370.

[0262] The working part 356 includes a vibrator 378 and a leveling floor 380. The vibrator 378 is fixed to the second pulley 374. When the second pulley 374 rotates, the vibrator 378 moves the leveling floor 380. As a result, the leveling floor 380 vibrates in the vertical direction. By repeatedly pressing the leveling floor 380 against the mounting surface P1, the mounting surface P1 such as the ground is compacted.

[0263] When the tamping machine 4a (refer to Fig. 27 ) or the plate compactor 4b is in motion, the tamping machine 4a or the plate compactor 4b vibrates. Accordingly, the vibration of the tamping machine 4a or the plate compactor 4b is transmitted to the motor unit 10 via the motor shaft 140. Fig. 22 As shown, 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-proofing member 94. Once the vibration is transmitted to the vibration-proofing member 94, the first right vibration-proofing member 170 and the second right vibration-proofing member 172 (see Fig.18 ), and the third right vibration-isolating member 174 (refer to Fig.18 ) will be elastically deformed in the vertical direction, left-right direction, and front-back direction between the right wall 154a of the plate member 92 and the right cover member 96, and the first left vibration-proof member 176 and the second left vibration-proof member 178 (refer to Fig.18 ), and the third left vibration-proof member 180 (refer to Fig.18 ) is elastically deformed in the vertical direction, the horizontal direction, and the front-rear direction between the left wall 154b of the plate member 92 and the left cover member 98. As a result, the vibration is attenuated, and the vibration is suppressed from being transmitted to the right cover member 96 and the left cover member 98. As a result, the vibration is transmitted to the battery pack BP (see Figure 4 ) is suppressed, and the vibration is transmitted to the control circuit substrate 196 of the control unit 102 via the support unit 100 (refer to Fig.26 ) situation is suppressed.

[0264] In addition, if Fig.26As shown, the vibration transmitted to the motor housing 84 is transmitted to the cylindrical vibration-proof member 104. Once the vibration is transmitted, the cylindrical vibration-proof member 104 is elastically deformed in the vertical direction, the left-right direction, and the front-back direction between the motor housing 84 and the substrate housing 192. Accordingly, the vibration is attenuated, and the situation where the vibration is transmitted to the substrate housing 192 is suppressed. As a result, the situation where the vibration is transmitted to the control circuit substrate 196 is suppressed.

[0265] like Fig.33 As shown, the motor unit 10 can be mounted on a slope mower 4c. The slope mower 4c is a device for mowing. The slope mower 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 position. The fixing base 412 is fixed to the 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.

[0266] A pair of front wheels 402 are rotatably supported at the front portion of the housing 400. A pair of rear wheels 404 are rotatably supported at the rear portion of the housing 400. The slope mower 4c moves on the placement surface P1 by the rotation of the pair of front wheels 402 and the pair of rear wheels 404.

[0267] 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 .

[0268] The handle 418 is mounted on the upper portion of the fixed frame 416. The user can move the slope mower 4c by holding the handle 418 and pushing it forward.

[0269] The trigger 420 is rotatably mounted on the handle 418. The user can operate the trigger 420 by holding the handle 418 with his hand close to the handle 418. When the trigger 420 is operated, the motor 86 of the motor unit 10 is operated.

[0270] The working unit 408 includes a connecting portion 424, a transmission shaft 426, and a mowing blade 428. The connecting portion 424 connects the motor shaft 140 and the transmission shaft 426.

[0271] The transmission shaft 426 extends in the up-down direction. The transmission shaft 426 is integrated with the motor shaft 140, and the transmission shaft 426 rotates around a central axis 140a extending in the up-down direction.

[0272] The mowing blade 428 is fixed to the lower end of the transmission shaft 426. The mowing blade 428 is integrated with the transmission shaft 426, and the mowing blade 428 rotates around the central axis 140a, thereby cutting the grass.

[0273] (Effect)

[0274] The motor unit 10 of this embodiment is detachably mounted on various types of operation units 4 and operates the operation units 4. The motor unit 10 includes a main body housing 12 including a storage portion 20 having an upper wall 20c (an example of a first wall), a first battery mounting portion 22 disposed on the upper wall 20c, and a second battery mounting portion 24 disposed on the upper wall 20c; and a motor 86 disposed inside the storage portion 20 and operating the operation unit 4. A first battery pack BP1 (an example of a first battery) for supplying power to the motor 86 is mounted on the first battery mounting portion 22 so as to be slidable along the upper wall 20c. A second battery pack BP2 (an example of a second battery) for supplying power to the motor 86 is mounted on the second battery mounting portion 24 so as to be slidable along the upper wall 20c. The storage section 20 is not arranged between the first battery pack BP1 mounted on the first battery mounting portion 22 and the second battery pack BP2 mounted on the second battery mounting portion 24. The first battery pack BP1 includes a left surface 56b (an example of a first side surface). The second battery pack BP2 includes a right surface 56c (an example of a second side surface) that is opposite to the left surface 56b and arranged in parallel with the left surface 56b when the first battery pack BP1 is mounted on the first battery mounting portion 22 and the second battery pack BP2 is mounted on the second battery mounting portion 24.

[0275] 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 mounted on the first battery mounting portion 22, and the second battery pack BP2 is mounted on the second battery mounting portion 24. Accordingly, the small first battery pack BP1 and the second battery pack BP2 with high versatility can be used in the motor unit 10. In addition, the left surface 56b of the first battery pack BP1 and the right surface 56c of the second battery pack BP2 are parallel to each other, so that the motor unit 10 with the first battery pack BP1 and the second battery pack BP2 mounted thereon can be made smaller in size compared to a configuration in which the left surface 56b of the first battery pack BP1 and the right surface 56c of the second battery pack BP2 are not parallel to each other.

[0276] The motor unit 10 does not include a wall portion disposed between the left surface 56 b of the first battery pack BP1 and the right surface 56 c of the second battery pack BP2 when the first battery pack BP1 is mounted on the first battery mounting portion 22 and the second battery pack BP2 is mounted on the second battery mounting portion 24 .

[0277] According to the above configuration, the motor unit 10 on which the first battery pack BP1 and the second battery pack BP2 are mounted can be further reduced in size.

[0278] Furthermore, when the motor unit 10 is placed on the placement surface P1 , the upper wall 20 c is arranged above the motor 86 .

[0279] 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 arranged at a position closer to the mounting surface P1 than the first battery pack BP1 and the second battery pack BP2.

[0280] The upper wall 20 c also includes an upper surface 34 a (an example of a first surface) for arranging the first battery mounting portion 22 and the second battery mounting portion 24 .

[0281] According to the above configuration, the first battery pack BP1 can be easily mounted on the first battery mounting portion 22 , and the second battery pack BP2 can be easily mounted on the second battery mounting portion 24 .

[0282] The motor unit 10 also includes an elastically deformable vibration-proof portion 94 (an example of a vibration-proof member) that is disposed between the motor 86 and the main body housing 12 .

[0283] According to the above configuration, it is possible to suppress the vibration from being transmitted from the motor 86 to the main body case 12. Accordingly, it is possible to suppress the vibration from being transmitted to the first battery pack BP1 and the second battery pack BP2.

[0284] The motor unit 10 also 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-proof portion 94 is fixed to the plate member 92 and the main body housing 12.

[0285] In the configuration in which the vibration-proof part 94 is directly fixed to the motor housing 84, the configuration of the motor housing 84 becomes complicated. According to the above configuration, it is possible to suppress the configuration of the motor housing 84 from becoming complicated.

[0286] The motor unit 10 further includes a control unit 102 that is disposed inside the housing portion 20 and controls the motor 86 , and a support unit 100 that supports the control unit 102 and is fixed to the plate member 92 via the vibration-proof portion 94 .

[0287] According to the above configuration, it is possible to suppress the vibration from being transmitted to the control unit 102 .

[0288] In addition, each of the first battery pack BP1 and the second battery pack BP2 may include a hook portion 58 operated by a user. The main body case 12 includes a groove 34b (an example of an engaged portion) engaged with the hook portion 58.

[0289] According to the above configuration, since the first battery pack BP1 and the second battery pack BP2 are engaged with the recessed groove 34 b of the main body casing 12 , it is possible to suppress the first battery pack BP1 and the second battery pack BP2 from being separated from the main body casing 12 .

[0290] Furthermore, when the motor unit 10 is viewed in the up-down direction perpendicular to the upper wall 20 c , the first battery mounting portion 22 and the second battery mounting portion 24 do not overlap.

[0291] According to the above configuration, it is possible to suppress the structure of the upper wall 20c from becoming complicated, compared with a configuration in which the first battery mounting portion 22 and the second battery mounting portion 24 overlap when the motor unit 10 is viewed in the up-down direction perpendicular to the upper wall 20c.

[0292] In addition, the first battery pack BP1 is mounted on the first battery mounting portion 22 so as to be slidable in the front-rear direction (an example of the first direction) along the upper wall 20c. The second battery pack BP2 is mounted on the second battery mounting portion 24 so as to be slidable in the front-rear direction. The motor 86 includes a motor shaft 140 extending in the front-rear direction and fixed to the working unit 4.

[0293] According to the above configuration, the direction in which the first battery pack BP1 is to be slid and the direction in which the second battery pack BP2 is to be slid can be easily understood by the posture of the motor shaft 140 .

[0294] The motor unit 10 further includes a control unit 102 that is disposed inside the housing portion 20 and controls the motor 86. The control unit 102 at least partially overlaps the motor 86 when the motor unit 10 is viewed in the front-rear direction.

[0295] According to the above configuration, compared with a configuration in which the control unit 102 at least partially does not overlap the motor 86 when the motor unit 10 is viewed in the front-rear direction, it is possible to suppress the motor unit 10 from becoming larger in a direction perpendicular to the front-rear direction.

[0296] The motor unit 10 further includes a first fixing portion 148 (an example of a fixing portion) fixed to the working unit 4 . The motor 86 is disposed between the first fixing portion 148 and the first battery mounting portion 22 and between the first fixing portion 148 and the second battery mounting portion 24 .

[0297] According to the above configuration, it is possible to suppress interference between the first battery pack BP1 and the second battery pack BP2 and the working unit 4 .

[0298] The motor unit 10 of this embodiment is detachably mounted on various types of operation units 4 and operates the operation units 4. The motor unit 10 includes a main body housing 12 including a housing portion 20 having an upper wall 20c (an example of a first wall), a first battery mounting portion 22 disposed on the upper wall 20c, and a second battery mounting portion 24 disposed on the upper wall 20c; and a motor 86 disposed inside the housing portion 20 and operating the operation unit 4. A first battery pack BP1 (an example of a first battery) for supplying power to the motor 86 is mounted on the first battery mounting portion 22. A second battery pack BP2 (an example of a second battery) for supplying power to the motor 86 is mounted on the second battery mounting portion 24. The maximum output value of the motor 86 is greater than or equal to 1.5 kW and less than or equal to 2.35 kW.

[0299] 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 mounted on the first battery mounting portion 22, and the second battery pack BP2 is mounted on the second battery mounting portion 24. In addition, the motor 86 with a maximum output value of 1.5 kW or more and 2.35 kW or less is used to operate the working unit 4 with a relatively high output. Accordingly, the small first battery pack BP1 and the second battery pack BP2 with high versatility can be used in the motor unit 10 to operate the working unit 4 with a relatively high output.

[0300] 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.

[0301] The motor 86 having 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 the relatively high-output working unit 4. Thus, the first battery pack BP1 and the second battery pack BP2, which are small and highly versatile, can be used in the motor unit 10 to operate the relatively high-output working unit 4.

[0302] In addition, the volume of the main housing 12 is 9000cm 3 the following.

[0303] Generally, the higher the maximum output value of the motor 86 is, the larger the motor 86 is. Accordingly, the main body housing 12 is larger. According to the above configuration, in the motor unit 10 that operates the operation unit 4 with a relatively high output, the main body housing 12 can be miniaturized. Accordingly, the motor unit 10 can be miniaturized.

[0304] The volume of the first battery pack BP1 and the volume of the second battery pack BP2 are 1500 cm 3 the following.

[0305] According to the above configuration, the motor unit 10 can be reduced in size.

[0306] Furthermore, when the motor unit 10 is placed on the placement surface P1 , the upper wall 20 c is arranged above the motor 86 .

[0307] 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 arranged at a position closer to the mounting surface P1 than the first battery pack BP1 and the second battery pack BP2.

[0308] In addition, the first battery pack BP1 is mounted on the first battery mounting portion 22 so as to be slidable in the front-rear direction (an example of the first direction) along the upper wall 20c. The second battery pack BP2 is mounted on the second battery mounting portion 24 so as to be slidable in the front-rear direction. The motor 86 includes a motor shaft 140 extending in the front-rear direction and fixed to the working unit 4.

[0309] According to the above configuration, the direction in which the first battery pack BP1 is to be slid and the direction in which the second battery pack BP2 is to be slid can be easily understood by the posture of the motor shaft 140 .

[0310] The motor unit 10 further includes a first fixing portion 148 (an example of a fixing portion) fixed to the working unit 4 . The motor 86 is disposed between the first fixing portion 148 and the first battery mounting portion 22 and between the first fixing portion 148 and the second battery mounting portion 24 .

[0311] According to the above configuration, it is possible to suppress interference between the first battery pack BP1 and the second battery pack BP2 and the working unit 4 .

[0312] Furthermore, the first battery pack BP1 mounted on the first battery mounting portion 22 and the second battery pack BP2 mounted on the second battery mounting portion 24 are electrically connected in series.

[0313] 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.

[0314] The motor unit 10 of this embodiment is detachably mounted on various types of operation units 4 and operates the operation units 4. The motor unit 10 includes: a main body housing 12 including a housing portion 20 having an upper wall 20c (an example of a first wall), a first battery mounting portion 22 disposed on the upper wall 20c, and a second battery mounting portion 24 disposed on the upper wall 20c; a motor 86 disposed inside the housing portion 20 and operating the operation unit 4; and a fixing unit 90 including a first fixing portion 148 and a second fixing portion 150. A first battery pack BP1 (an example of a first battery) for supplying power to the motor 86 is mounted on the first battery mounting portion 22. A second battery pack BP2 (an example of a second battery) for supplying power to the motor 86 is mounted on the second battery mounting portion 24. The various types of working units 4 include a plate compactor 4b (an example of a first working unit) and a tamping machine 4a (an example of a second working unit) different from the plate compactor 4b. The first fixing portion 148 is fixed to the plate compactor 4b. The second fixing portion 150 is fixed to the tamping machine 4a.

[0315] 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 mounted on the first battery mounting portion 22, and the second battery pack BP2 is mounted on the second battery mounting portion 24. Accordingly, the small first battery pack BP1 and the second battery pack BP2 with high versatility can be used in the motor unit 10. In addition, the motor unit 10 is fixed to the plate compactor 4b by the first fixing portion 148, and is fixed to the tamping machine 4a by the second fixing portion 150. Accordingly, the types of working units 4 that can use the motor unit 10 can be increased.

[0316] 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 86 is disposed between the first fixing portion 148 and the first battery mounting portion 22 and between the first fixing portion 148 and the second battery mounting portion 24 .

[0317] According to the above configuration, it is possible to suppress the first battery pack BP1 and the second battery pack BP2 from interfering with the plate compactor 4b.

[0318] The motor unit 10 further includes a motor housing 84 that accommodates a motor 86 . The second fixing portion 150 is formed in the motor housing 84 .

[0319] According to the above configuration, the number of components 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 .

[0320] The first fixing portion 148 includes a first fixing surface 148a fixed to the plate compactor 4b. The second fixing portion 150 includes a second fixing surface 150a fixed to the rammer 4a. The second fixing surface 150a is substantially orthogonal to the first fixing surface 148a.

[0321] According to the above configuration, the first fixing portion 148 or the second fixing portion 150 can be selected according to the shape of the working unit 4. This can increase the types of working units 4 that can use the motor unit 10.

[0322] In addition, the motor unit 10 further includes a fan 88 that is disposed inside the housing portion 20 and rotated by the operation of the motor 86. An air intake port 26a (an example of a first air hole) is formed between the housing portion 20 and the second fixing portion 150. An air exhaust port 124 (an example of a second air hole) is formed in the second fixing portion 150. When the fan 88 rotates, air flows into the housing portion 20 from one of the air intake port 26a and the air exhaust port 124, and flows out to the outside of the housing portion 20 from the other of the air intake port 26a and the air exhaust port 124.

[0323] According to the above configuration, the motor 86 disposed inside the housing portion 20 can be cooled.

[0324] In addition, the rated capacity of the first battery pack BP1 is different from the rated capacity of the second battery pack BP2.

[0325] According to the above configuration, various types of battery packs BP can be used for the motor unit 10 .

[0326] The working machine 2 of the present embodiment includes: a rammer 4a; and a motor unit 10 which is detachably mounted on the rammer 4a and operates the rammer 4a. The motor unit 10 includes: a main body housing 12 which includes a housing 20, a first battery mounting portion 22 arranged in the housing 20, and a second battery mounting portion 24 arranged in the housing 20; and a DC motor 86 which is arranged inside the housing 20 and operates the rammer 4a. The first battery mounting portion 22 is mounted with: a first battery pack BP1 (an example of a first battery) for supplying power to the motor 86. The second battery mounting portion 24 is mounted with: a second battery pack BP2 (an example of a second battery) for supplying power to the motor 86.

[0327] 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 mounted on the first battery mounting portion 22, and the second battery pack BP2 is mounted on the second battery mounting portion 24. Thus, the small first battery pack BP1 and the second battery pack BP2 with high versatility can be used in the motor unit 10 to operate the tamping machine 4a.

[0328] (Second embodiment)

[0329] In the second embodiment, the differences from the first embodiment are described. Fig.34 As shown, in the second embodiment, the first battery mounting portion 22 and the second battery mounting portion 24 are arranged on the rear wall 20d of the storage portion 20. The first battery mounting portion 22 and the second battery mounting portion 24 are arranged side by side in the left-right direction. When the motor unit 10 is viewed in the front-back direction, the first battery mounting portion 22 and the second battery mounting portion 24 do not overlap.

[0330] The first battery pack BP1 is mounted on the first battery mounting portion 22 by sliding along the mounting direction D1, and is removed from the first battery mounting portion 22 by sliding along the removal direction D2 opposite to the mounting direction D1. The mounting direction D1 is a downward direction. The removal direction D2 is an upward direction. The second battery pack BP2 is mounted on the second battery mounting portion 24 by sliding along the mounting direction D1, and is removed from the second battery mounting portion 24 by sliding along the removal direction D2.

[0331] (Third embodiment)

[0332] In the third embodiment, the differences from the first embodiment are described. Fig.35 As shown, in the third embodiment, the first battery mounting portion 22 and the second battery mounting portion 24 are arranged on the left wall 20e of the storage portion 20. The first battery mounting portion 22 and the second battery mounting portion 24 are arranged side by side in the front-to-back direction. When the motor unit 10 is viewed in the left-right direction, the first battery mounting portion 22 and the second battery mounting portion 24 do not overlap.

[0333] The first battery pack BP1 is mounted on the first battery mounting portion 22 by sliding along the mounting direction D1, and is removed from the first battery mounting portion 22 by sliding along the removal direction D2 opposite to the mounting direction D1. The mounting direction D1 is a downward direction. The removal direction D2 is an upward direction. The second battery pack BP2 is mounted on the second battery mounting portion 24 by sliding along the mounting direction D1, and is removed from the second battery mounting portion 24 by sliding along the removal direction D2.

[0334] (Fourth embodiment)

[0335] In the fourth embodiment, the differences from the first embodiment are described. Fig.36 As shown, the first right vibration-proofing member 170 is arranged at a position more upward than 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-proofing member 170 in the vertical direction is arranged at a position more downward than the upper end 86a of the motor 86. The upper end of the first right vibration-proofing member 170 is arranged at a position more upward than the upper end 86a of the motor 86. In the front-to-back direction, the position of the center of the first right vibration-proofing member 170 is substantially the same as the position of the center of gravity G1 of the motor unit 10.

[0336] The second right vibration-proofing member 172 and the third right vibration-proofing member 174 are arranged at a position lower than the center of gravity G1 and the central axis 140a of the motor unit 10. The second right vibration-proofing member 172 and the third right vibration-proofing member 174 are arranged at a position higher than the lower end 86b of the motor 86. In the front-back direction, the positions of the centers of the second right vibration-proofing member 172 and the third right vibration-proofing member 174 are substantially the same as the position of the center of gravity G1 of the motor unit 10.

[0337] 1st left vibration isolation member 176 (refer to Fig.21 ) in the front-to-back direction is substantially the same as the front-to-back direction position of the first right vibration-isolating member 170. The top-to-bottom direction position of the first left vibration-isolating member 176 is substantially the same as the top-to-bottom direction position of the first right vibration-isolating member 170. The second left vibration-isolating member 178 (see Fig.21 ) in the front-to-back direction is substantially the same as the front-to-back direction of the second right vibration-isolating member 172. The top-to-bottom direction of the second left vibration-isolating member 178 is substantially the same as the top-to-bottom direction of the second right vibration-isolating member 172. The third left vibration-isolating member 180 (see Fig.21 ) in the front-to-rear direction is substantially the same as the position of the third right vibration isolating member 174 in the front-to-rear direction. The position of the third left vibration isolating member 180 in the up-down direction is substantially the same as the position of the third right vibration isolating member 174 in the up-down direction.

[0338] (Fifth embodiment)

[0339] In the fifth embodiment, the differences from the first embodiment are described. Fig.37 As shown in FIG. 1 , the vibration-proofing unit 94 only includes a first right vibration-proofing member 170 and a first left vibration-proofing member 176. Fig.37In order to facilitate understanding of the position of the first left vibration-isolating component 176, the outer surface of the first right vibration-isolating component 170 is given a symbol 176. The shape of the first right vibration-isolating component 170 of the fifth embodiment is different from the shape of the first right vibration-isolating component 170 of the first embodiment, and the shape of the first left vibration-isolating component 176 of the fifth embodiment is different from the shape of the first left vibration-isolating component 176 of the first embodiment.

[0340] The first right vibration-proofing component 170 has a triangular ring shape. In the front-to-back direction, the position of the center CP of the first right vibration-proofing component 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-proofing component 170 is arranged at a position that is more upward than the center of gravity G1 of the motor unit 10 and the center axis 140a of the motor shaft 140. The upper end of the first right vibration-proofing component 170 is arranged at a position that is more upward than the upper end 86a of the motor 86. The lower end of the first right vibration-proofing component 170 is arranged at a position that is more downward than the lower end 86b of the motor 86. At least a portion of the first right vibration-proofing component 170 is arranged at a position that is more downward than the upper end 86a of the motor 86.

[0341] The shape of the first left vibration isolating member 176 is substantially the same as the shape of the first right vibration isolating member 170. The position of the first left vibration isolating member 176 in the front-to-back direction is substantially the same as the position of the first right vibration isolating member 170 in the front-to-back direction. The position of the first left vibration isolating member 176 in the up-down direction is substantially the same as the position of the first right vibration isolating member 170 in the up-down direction.

[0342] (Sixth embodiment)

[0343] In the sixth embodiment, only the points different from the first embodiment are described. Figure 4 as well as Fig.38 As shown in FIG. 1 , the battery pack BP is a highly versatile battery pack. The battery pack BP can be used for the electric tool 6 in addition to the motor unit 10. Fig.38 As shown, for example, the battery pack BP can be used for: a steel bar bundling machine that bundles a plurality of steel bars R using a cable W. In addition, the battery pack BP can also be used for: an electric tool 6 other than the steel bar bundling machine, for example, an impact driver, a circular saw, or a drive drill. The battery pack BP is directly mounted on the electric tool 6. In addition, the battery pack BP can also be used for gardening products. Examples of gardening products are lawn mowers, blowers, hedge reamers, chain saws, trucks, snowplows, or tillers. The battery pack BP is directly mounted on the gardening product. In addition, the battery cells of the battery pack BP may be cylindrical cells, square cells, or laminated cells. In addition, Figure 4The configuration (e.g., size, shape, maximum voltage value, rated capacity, and type of battery cell) of the first battery pack BP1 shown may be different from the configuration (e.g., size, shape, maximum voltage value, rated capacity, and type of battery cell) of the second battery pack BP2.

[0344] like Fig.13 As shown, when the motor unit 10 is placed on the placement surface P1, the first battery pack BP1 and the second battery pack BP2 (see Figure 8 ) is arranged at a position upward from the motor 86. The first battery pack BP1 and the second battery pack BP2 (see Figure 8 ), and is substantially parallel to the first fixing portion 148, for example, the first fixing surface 148a.

[0345] like Fig.39 As shown, 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-to-back direction. The front through hole 500 is arranged on the central axis 140a of the motor shaft 140. The motor shaft 140 penetrates the front through hole 500.

[0346] The front rib 502 is disposed in the front through-hole 500. The front rib 502 protrudes from the inner peripheral surface of the front through-hole 500 toward the central axis 140a.

[0347] The bearing 144 is mounted on the front bracket 110. The bearing 144 is disposed in the front through hole 500. The bearing 144 is disposed at a position further to the rear side than the front end portion 140b of the motor shaft 140. The front end portion 140b of the motor shaft 140 is disposed in the main housing 12 (see Fig.13 The front end portion 140b of the motor shaft 140 is fixed to: the bearing connection portion 324 of the tamping machine 4a (see Fig. 27 ) and the first pulley 370 of the plate compactor 4b (refer to Fig.31 The motor shaft 140 and the first fixing portion 148, for example, the first fixing surface 148a (see Fig.13), so the front end portion 140b of the motor shaft 140 is roughly 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 housing space 122 side. Thus, the bearing 144 is arranged in: the motor housing space 122, that is, the inside of the motor housing 84. In addition, the bearing 144 will not pass through the front through hole 500 and fall out toward the outside of the motor housing space 122. The bearing 144 supports the motor shaft 140 so that it can rotate. The outer diameter of the bearing 144 is, for example, greater than 50 mm and less than 60 mm. In addition, the inner diameter of the bearing 144 is, for example, greater than 20 mm and less than 25 mm. The length of the bearing 144 in the front-to-back direction is, for example, greater than 10 mm and less than 20 mm.

[0348] 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 arranged on the central axis 140a. The motor shaft 140 penetrates the rear through hole 506.

[0349] The rear rib 508 is arranged 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-to-back direction. The distance L10 between the front end of the rear rib 508 and the rear end of the front rib 502 is, for example, less than 115 mm. Accordingly, the motor housing 84 can be miniaturized. The distance L10 can be less than 110 mm, less than 105 mm, or less than 100 mm. In addition, the distance L10 is, for example, more than 80 mm. Accordingly, the reduction in the maximum output value of the motor 86 caused by the miniaturization of the motor 86 can be suppressed. The distance L10 can be more than 85 mm, more than 90 mm, or more than 95 mm.

[0350] The bearing 142 is mounted on the partition wall 116. The bearing 142 is arranged in the rear through hole 506. The bearing 142 is arranged at a position closer to the rear side than the bearing 144. Therefore, the bearing 144 is arranged between the front end 140b of the motor shaft 140 and the bearing 142. The bearing 142 and the bearing 144 are arranged in the front-to-back direction. In the front-to-back direction, the stator body 132, the coil 134, the outer rotor body 136, and the permanent magnet 138 of the motor 86 are arranged between the bearing 142 and the bearing 144. The bearing 142 abuts against the front end of the rear rib 508 from the motor housing space 122 side. Therefore, the bearing 142 is arranged inside the motor housing space 122, that is, the motor housing 84. In addition, the bearing 142 does not pass through the rear through hole 506 and fall out toward the outside of the motor housing space 122. The bearing 142 supports the motor shaft 140 so that it can rotate. The outer diameter of the bearing 142 is, for example, greater than 30 mm and less than 45 mm. The outer diameter of the bearing 142 is smaller than the outer diameter of the bearing 144. The inner diameter of the bearing 142 is, for example, greater than 15 mm and less than 20 mm. The inner diameter of the bearing 142 is smaller than the inner diameter of the bearing 144. The length of the bearing 142 in the front-to-back direction is, for example, greater than 5 mm and less than 15 mm. The length of the bearing 142 in the front-to-back direction is smaller than the length of the bearing 144 in the front-to-back direction.

[0351] The distance L11 between the front end of the bearing 144 and the rear end of the bearing 142 is, for example, less than 115 mm. Accordingly, the motor housing 84 can be miniaturized. The distance L11 can be less than 110 mm, less than 105 mm, or less than 100 mm. In addition, the distance L11 is, for example, more than 80 mm. Accordingly, the reduction in the maximum output value of the motor 86 caused by the miniaturization of the motor 86 can be suppressed. The distance L11 can be more than 85 mm, more than 90 mm, or more than 95 mm. The distance L11 is substantially the same as the distance L10.

[0352] The distance L12 between the rear end of the bearing 144 and the front end of the bearing 142 is, for example, less than 100 mm. Accordingly, the motor housing 84 can be miniaturized. The distance L12 can be less than 90 mm, or 85 mm, or less than 80 mm. In addition, the distance L12 is, for example, more than 60 mm. Accordingly, the reduction in the maximum output value of the motor 86 caused by the miniaturization of the motor 86 can be suppressed. The distance L11 can be more than 65 mm, or more than 70 mm, or more than 75 mm. The distance L12 is the separation distance between the bearing 142 and the bearing 144.

[0353] like Fig.40As shown, the air hole 510 penetrates the partition wall 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 connects the motor housing space 122 and the fan housing space 126.

[0354] like Fig.39 As shown, in this embodiment, the motor unit 10 has only one fan 88. The fan 88 is arranged in the fan housing space 126. The fan 88 is arranged outside the motor housing 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. Fig.15 As shown in FIG. 1 , air passes through the air inlet 26a and flows from the outside of the motor unit 10 into the housing space 18 of the main housing 12. Fig.26 As shown, the air passes through the air inlet port 202 of the substrate housing 192 and flows into the internal space 200 in the substrate housing 192. Next, the air flows along the heat sink 204, passes through the air passage 208 of the cylindrical vibration-proof component 104 and the motor air intake port 128 of the rear bracket 112, and flows from the internal space 200 into the fan accommodation space 126. The air flows along the heat sink 204, and the control circuit substrate 196 is cooled. Fig.40 As shown, the air is conveyed by the fan 88 in a direction away from the central axis 140a (radially outward of the fan 88). Next, the air passes through the air hole 510 and flows from the fan housing space 126 into the motor housing space 122. Next, the air flows forward inside and outside the motor 86. Thus, the motor 86 is cooled. Finally, the air is discharged from the exhaust port 124 ( Fig.15 Reference) passes through the motor housing space 122 and is discharged from the motor housing space 122 to the outside of the motor unit 10. In this embodiment, the air sent by the fan 88 does not pass through the outside of the motor housing 84, but is discharged to the outside of the motor unit 10. Therefore, no heat sink is formed on the outer surface of the motor housing 84 to guide the air.

[0355] like Fig.41 As shown, 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. Accordingly, the situation where the motor 86 is enlarged is suppressed. The diameter DR1 can be 120 mm or less. In addition, the diameter DR1 can be, for example, 110 mm or more. Accordingly, it is possible to suppress: the reduction in the maximum output value of the motor 86 caused by the miniaturization of the motor 86. The diameter DR1 can be 115 mm or more. Fig.39As shown, the length L13 of the stator body 132 in the front-to-back direction is, for example, less than 23 mm. Accordingly, the situation where the motor 86 is enlarged is suppressed. The length L13 can be less than 20 mm. In addition, the length L13 is, for example, more than 13 mm. Accordingly, it is possible to suppress: the reduction in the maximum output value of the motor 86 caused by the miniaturization of the motor 86. The length L13 can be more than 15 mm.

[0356] 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. In addition, the diameter DR2 may be, for example, 138 mm or more. This prevents the maximum output value of the motor 86 from decreasing due to the miniaturization of the motor 86. The diameter DR2 may be 140 mm or more. The diameter DR2 is larger than the diameter DR1.

[0357] like Fig.41 As shown, the stator body 132 includes a plurality of (24 in this embodiment) teeth 514. The coil 134 is wound around each tooth 514. The 24 teeth 514 are arranged at equal intervals around the central axis 140a.

[0358] The plurality of permanent magnets 138 are fixed to the outer rotor body 136, and the plurality of permanent magnets 138 are arranged to surround the stator body 132. The plurality of permanent magnets 138 are arranged between the outer rotor body 136 and the teeth 514. In the present embodiment, the number of the plurality of permanent magnets 138 is 28. The number of the plurality of permanent magnets 138 is greater than the number of the plurality of teeth 514. In addition, the number of the plurality of permanent magnets 138 is less than or equal to 1.5 times the number of the plurality of teeth 514.

[0359] The residual magnetic flux density Br of the permanent magnet 138 is, for example, 1.32 T or more. This can enhance the magnetic force generated by the permanent magnet 138. The residual magnetic flux density may be 1.40 T or more, or 1.50 T or more. In addition, the residual magnetic flux density Br may be, for example, 1.8 T or less. The residual magnetic flux density Br may be 1.7 T or less, or 1.6 T or less.

[0360] The coercive force bHc of the permanent magnet 138 is, for example, 971 kA / m or more. This can enhance the magnetic force generated by the permanent magnet 138. The coercive force bHc may be 1000 kA / m or more, or 1050 kA / m or more. In addition, the coercive force bHc may be, for example, 1200 kA / m or less. The coercive force bHc may be 150 kA / m or less, or 1100 kA / m or less.

[0361] In this embodiment, the permanent magnet 138 is, for example, a neodymium magnet, and the magnetic force of the permanent magnet 138 is greater than the magnetic force of the samarium cobalt magnet, the magnetic force of the ferrite magnet, and the magnetic force of the ferrite magnet.

[0362] 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. In addition, 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 also be 3.0 kW or less, or 2.35 kW or less.

[0363] like Fig.39 As shown, the motor unit 10 further includes a sensor substrate 520. The sensor substrate 520 includes a plurality of Hall elements (not shown). The Hall elements detect the magnetic force from the permanent magnet 138, and the sensor substrate 520 detects the rotation of the motor 86. The sensor substrate 520 is disposed in the motor housing space 122. In the front-to-back direction, the sensor substrate 520 is disposed between the bearing 144 and the bearing 142. Fig.42 As shown, the sensor substrate 520 is opposed to the permanent magnet 138 in the front-rear direction. The sensor substrate 520 is arranged at a position further to the rear than the outer rotor body 136 and the permanent magnet 138. The sensor substrate 520 is fixed to the motor housing body 108 by screws 522. The sensor substrate 520 is arranged at a position further to the rear than the front bracket 110.

[0364] like Figure 7 As shown, the main power switch 74, the display panel 76, the action switch 78a, and the speed change switch 78b are arranged on the upper wall 20c of the storage portion 20 of the main housing 12. The main power switch 74 receives the user's operation to switch the on state and the off state of the motor unit 10. The display panel 76 lights up when the motor unit 10 is in the on state, and turns off when the motor unit 10 is in the off state. The display panel 76 corresponds to the display light. The action switch 78a receives the user's operation to activate the motor 86. The speed change switch 78b receives the user's operation to change the speed of the motor shaft 140. As shown in FIG. Fig.43 As shown, the main power switch 74 , the display panel 76 , and the rotation speed change switch 78 b are arranged on the switch substrate 524 .

[0365] like Fig.44 As shown, the motor unit 10 includes a plurality of first switch signal lines 530 , a plurality of first switch connection signal lines 532 , a first switch connection terminal 534 , a plurality of second switch wires 536 , a plurality of second switch connection wires 538 , and a second switch connection terminal 540 .

[0366] A plurality of first switch signal lines 530 are connected to the action switch 78a and extend from the action switch 78a. The plurality of first switch signal lines 530 are arranged at a position more upward than the control circuit substrate 196. A plurality of first switch connection signal lines 532 are connected to the mounting surface 196a of the control circuit substrate 196 and extend from the mounting surface 196a of the control circuit substrate 196. The mounting surface 196a is substantially orthogonal to the front-rear direction, and the mounting surface 196a faces forward. 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 connection terminal 534 is arranged at a position more upward than the control circuit substrate 196. The first switch connection terminal 534 connects the plurality of first switch signal lines 530 with the plurality of first switch connection signal lines 532. Thus, when the user operates the operation switch 78 a , a signal is transmitted from the operation switch 78 a to the control circuit board 196 via the first switch signal line 530 , the first switch connection terminal 534 , and the first switch connection signal line 532 .

[0367] like Fig.45 As shown, the main housing 12 has inside: a terminal accommodating space 544 arranged on the upper side of the control unit 102. A plurality of first switch signal lines 530 and first switch connection terminals 534 are arranged in the terminal accommodating space 544. A plurality of first switch signal lines 530 and first switch connection terminals 534 are arranged at: a position closer to the upper side than the control unit 102. The terminal accommodating space 544 is arranged: between the upper wall 20c of the accommodating portion 20 of the main housing 12 and the control unit 102. The terminal accommodating space 544 is arranged: closer to the rear side than the motor housing 84 and the cylindrical vibration-proof component 104. Thus, the first switch connection terminals 534 are arranged: at a position closer to the upper side than the fan 88 (refer to Fig.34 )、Bearing 142 (refer to Fig.34 ) and the stator body 132 (refer to Fig.34 ) is located further to the rear. In the left-right direction, the first switch connection terminal 534 is arranged at a position that is closer to the rear than the first left vibration-proof member 176 (refer to Fig.19 ), second left anti-vibration member 178 (refer to Fig.19 ) and the third left vibration-isolating member 180 are further to the right and are closer to the first right vibration-isolating member 170 (refer to Fig.18 ), second right anti-vibration member 172 (refer to Fig.18 ), and the third right vibration-isolating member 174 (refer to Fig.49 ) is further to the left. In the left-right direction, the first switch connection terminal 534 is arranged at: the motor 86 (refer to Fig.41) between the right end and the left end. Thus, in the left-right direction, the first switch connection terminal 534 is arranged at the first battery pack BP1 (refer to Figure 4 ) and the right end of the second battery pack BP2 (refer to Figure 4 ) and is arranged between the left ends of the plate member 92 (refer to Fig.17 ) between the right wall 154a and the left wall 154b. In the left-right direction, the first switch connection terminal 534 is arranged between the right end and the left end of the control circuit substrate 196.

[0368] like Fig.46 As shown, the outer housing 198 of the control unit 102 has a first wire opening 548 that connects the internal space 200 with the outside of the outer housing 198. The first wire opening 548 is arranged at the upper portion of the outer housing 198. A plurality of first switch connection signal wires 532 pass through the first wire opening 548.

[0369] like Fig.44 As shown, the plurality of second switch wires 536 are connected to the switch substrate 524. The plurality of second switch wires 536 are connected to the switch substrate 524 from the main power switch 74 (see Fig.43 ), display panel 76 (refer to Fig.43 ), and the speed change switch 78b (refer to Fig.43 ) is extended. A portion of the plurality of second switch wires 536 is a power line, and the remaining second switch wires 536 are signal lines. The plurality of second switch wires 536 are arranged at a position that is more upward than the control circuit substrate 196. The plurality of second switch connecting wires 538 are connected to the mounting surface 196a of the control circuit substrate 196 and extend from the mounting surface 196a of the control circuit substrate 196. A portion of the plurality of second switch connecting wires 538 is a power line, and the remaining second switch connecting wires 538 are signal lines. The second switch connecting terminal 540 is arranged at a position that is more upward than the control circuit substrate 196. The second switch connecting terminal 540 connects the plurality of second switch wires 536 to the plurality of second switch connecting wires 538. Accordingly, when the user operates the main power switch 74 and the speed change switch 78b, respectively, a signal is transmitted from the switch substrate 524 to the control circuit substrate 196 via the second switch wire 536, the second switch connection terminal 540, and the second switch connection wire 538. In addition, a signal is transmitted from the control circuit substrate 196 to the switch substrate 524 via the second switch connection wire 538, the second switch connection terminal 540, and the second switch wire 536, so that the display panel 76 is turned on or off.

[0370] like Fig.45As shown, the plurality of second switch wires 536 and the second switch connection terminal 540 are arranged in the terminal accommodation space 544. Thus, the second switch connection terminal 540 is arranged at: Fig.34 )、Bearing 142 (refer to Fig.34 ) and the stator body 132 (refer to Fig.34 ) is located further to the rear. The plurality of second switch wires 536 and the second switch connection terminal 540 are arranged at a position further to the upper side than the control unit 102. In the left-right direction, the second switch connection terminal 540 is arranged at a position further to the upper side than the first left vibration-proof member 176 (refer to Fig.19 ), second left anti-vibration member 178 (refer to Fig.19 ), and the third left vibration-proof member 180 (refer to Fig.45 ) is further to the right and is larger than the first right vibration-isolating member 170 (refer to Fig.18 ), second right anti-vibration member 172 (refer to Fig.18 ), and the third right vibration-isolating member 174 (refer to Fig.49 ) is located further to the left. In the left-right direction, the second switch connection terminal 540 is arranged on the motor 86 (refer to Fig.41 ) between the right end and the left end. Thus, in the left-right direction, the second switch connection terminal 540 is arranged at the first battery pack BP1 (refer to Figure 4 ) and the right end of the second battery pack BP2 (refer to Figure 4 ) and is arranged between the left ends of the plate member 92 (refer to Fig.17 ) between the right wall 154a and the left wall 154b. In the left-right direction, the second switch connection terminal 540 is arranged between the right end and the left end of the control circuit substrate 196. Fig.46 As shown, a plurality of second switch connecting wires 538 pass through the first wire opening 548 .

[0371] like Fig.47 as well as Fig.48 As shown, the motor unit 10 includes: a plurality of motor power lines 560, a plurality of motor connection power lines 562, a plurality of first motor connection terminals 564, a plurality of motor signal lines 566, a plurality of motor connection signal lines 568, and a second motor connection terminal 570.

[0372] like Fig.40As shown, the motor housing body 108 includes: a connecting pipe portion 574 that connects the motor housing space 122 with the outside of the motor housing 84, and the connecting pipe portion 574 extends backward from the cylinder portion 114. A plurality of motor power lines 560 pass through the connecting pipe portion 574. Although not shown in the figure, the plurality of motor power lines 560 are connected to the coil 134. The plurality of motor power lines 560 extend from the coil 134, pass through the connecting pipe portion 574, and then extend backward.

[0373] like Fig.47 as well as Fig.48 As shown, the motor connection power line 562 is connected to the mounting surface 196 a of the control circuit substrate 196 and extends from the mounting surface 196 a of the control circuit substrate 196 .

[0374] The plurality of first motor connection terminals 564 are arranged at a position upward from the control circuit board 196. Fig.46 , Fig.48 as well as Fig.49 , the first motor connection terminal 564 is shown by a dotted line. The first motor connection terminal 564 connects the motor power line 560 and the motor connection power line 562. Accordingly, the power for operating the motor 86 is supplied to the motor 86 from the control circuit substrate 196 via the motor power line 560, the first motor connection terminal 564, and the motor connection power line 562.

[0375] like Fig.47 as well as Fig.49 As shown, the plurality of motor power lines 560 and the plurality of first motor connection terminals 564 are arranged at a position further upward than the control unit 102. The plurality of first motor connection terminals 564 are arranged in the terminal accommodation space 544. Thus, the first motor connection terminals 564 are arranged at a position further upward than the fan 88 (see Fig.34 )、Bearing 142 (refer to Fig.34 ), and the stator body 132 (refer to Fig.34 ) is located further to the rear. In addition, in the front-to-rear direction, at least a portion of the first motor connection terminal 564 is located further to the front than the control circuit substrate 196. In the left-to-right direction, the first motor connection terminal 564 is located further to the front than the first left vibration-proof member 176 (see Fig.19 ), second left anti-vibration member 178 (refer to Fig.19 ), and the third left vibration-proof member 180 (refer to Fig.45 ) is further to the right and is larger than the first right vibration-isolating member 170 (refer to Fig.18 ), second right anti-vibration member 172 (refer to Fig.18), and the third right vibration-proof member 174 is located further to the left. In the left-right direction, the first motor connection terminal 564 is arranged on the motor 86 (refer to Fig.41 ) between the right and left ends. Thus, in the left-right direction, the first motor connection terminal 564 is arranged at the first battery pack BP1 (refer to Figure 4 ) and the right end of the second battery pack BP2 (refer to Figure 4 ) and is arranged between the left ends of the plate member 92 (refer to Fig.17 ) between the right wall 154a and the left wall 154b. In the left-right direction, the first motor connection terminal 564 is arranged between the right end and the left end of the control circuit substrate 196.

[0376] like Fig.46 As shown, the outer housing 198 has a second wire opening 578 that connects the inner space 200 with the outside of the outer housing 198. The second wire opening 578 is disposed at the upper portion of the outer housing 198. A plurality of motor connection power lines 562 pass through the second wire opening 578.

[0377] like Fig.40 As shown, a plurality of motor signal lines 566 pass through the communication pipe portion 574. The plurality of motor signal lines 566 are connected to the sensor substrate 520. The plurality of motor signal lines 566 extend from the sensor substrate 520, pass through the communication pipe portion 574, and then extend toward the rear.

[0378] like Fig.47 as well as Fig.48 As shown, a plurality of motor connection signal lines 568 are connected to the mounting surface 196 a of the control circuit substrate 196 , and extend from the mounting surface 196 a of the control circuit substrate 196 .

[0379] The second motor connection terminal 570 is arranged at a position upward from the control circuit board 196. The second motor connection terminal 570 connects the plurality of motor signal lines 566 to the plurality of motor connection signal lines 568. Fig.40 ) The detected signal is sent from the sensor substrate 520 to the control circuit substrate 196 via the motor signal line 566, the second motor connection terminal 570, and the motor connection signal line 568. As a result, the control circuit substrate 196 detects the rotation of the motor 86.

[0380] like Fig.47 as well as Fig.49As shown, the plurality of motor signal lines 566 and the second motor connection terminal 570 are arranged at a position further upward than the control unit 102. The second motor connection terminal 570 is arranged in the terminal accommodation space 544. Thus, the second motor connection terminal 570 is arranged at a position further upward than the fan 88 (see Fig.34 )、Bearing 142 (refer to Fig.34 ), and the stator body 132 (refer to Fig.34 ) is located further to the rear. In the left-right direction, the second motor connection terminal 570 is arranged at a position that is closer to the rear than the first left vibration-proof member 176 (refer to Fig.19 ), second left anti-vibration member 178 (refer to Fig.19 ), and the third left vibration-proof member 180 (refer to Fig.45 ) is further to the right and is larger than the first right vibration-isolating member 170 (refer to Fig.18 ), second right anti-vibration member 172 (refer to Fig.18 ), and the third right vibration-proof member 174 is located further to the left. In the left-right direction, the second motor connection terminal 570 is arranged on the motor 86 (refer to Fig.41 ) between the right and left ends. Thus, in the left-right direction, the second motor connection terminal 570 is arranged at the first battery pack BP1 (refer to Figure 4 ) and the right end of the second battery pack BP2 (refer to Figure 4 ) and is arranged between the left ends of the plate member 92 (refer to Fig.17 ) between the right wall 154a and the left wall 154b. In the left-right direction, the second motor connection terminal 570 is arranged between the right end and the left end of the control circuit substrate 196. Fig.46 As shown, a plurality of motor connection signal wires 568 pass through the second wire opening 578 .

[0381] like Fig.50 As shown, 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 connection signal lines 594, a first battery connection terminal 596, a plurality of second battery power lines 598, a plurality of second battery signal lines 600, a plurality of second battery connection signal lines 602, and a second battery connection terminal 604.

[0382] The plurality of first battery power lines 590 are connected to the first battery connection terminal 70 and the mounting surface 196a of the control circuit board 196 (see Fig.48 ). A plurality of first battery power lines 590 extend from the first battery connection end 70 to the mounting surface 196a of the control circuit board 196. Accordingly, the first battery pack BP1 (see Figure 4) is supplied from the first battery connection terminal 70 to the control circuit board 196 via the first battery power line 590. Fig.51 As shown, the first battery power line 590 passes between the first battery joint end 70 and the support plate 184. Fig.46 As shown, the first battery power line 590 passes through the second wire opening 578 .

[0383] like Fig.50 As shown, a plurality of first battery signal lines 592 are connected to the first battery connection terminal 70 and extend from the first battery connection terminal 70 .

[0384] The plurality of first battery connection signal lines 594 are connected to the mounting surface 196a of the control circuit substrate 196 (see Fig.48 ), and extends from the mounting surface 196a of the control circuit substrate 196. Fig.46 As shown, a plurality of first battery connection signal wires 594 pass through the second wire opening 578 .

[0385] like Fig.50 As shown, the first battery connection terminal 596 connects the plurality of first battery signal lines 592 and the plurality of first battery connection signal lines 594. Accordingly, the 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 joint end 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 arranged at a position that is closer to the upper side than the control unit 102. Fig.51 As shown, the first battery connection terminal 596 is arranged between the first battery joint end 70 and the support plate 184. In the left-right direction, the first battery connection terminal 596 is arranged on the motor 86 (see Fig.41 ) between the right and left ends.

[0386] like Fig.50 As shown, a plurality of second battery power lines 598 are connected to the second battery connection terminal 72 and the control circuit board 196. The plurality of second battery power lines 598 extend from the second battery connection terminal 72 to the control circuit board 196. Figure 4 ) is supplied from the second battery connection terminal 72 to the control circuit board 196 via the second battery power line 598. Fig.51 As shown, the second battery power line 598 passes between the second battery joint end 72 and the support plate 184. Fig.46As shown, the second battery power line 598 passes through the first wire opening 548.

[0387] like Fig.50 As shown, a plurality of second battery signal lines 600 are connected to the second battery connection terminal 72 and extend from the second battery connection terminal 72 .

[0388] The plurality of second battery connection signal lines 602 are connected to the mounting surface 196a of the control circuit board 196 (see Fig.48 ), and extends from the mounting surface 196a of the control circuit substrate 196. Fig.46 As shown, a plurality of second battery connection signal wires 602 pass through the first wire opening 548 .

[0389] like Fig.50 As shown, the second battery connection terminal 604 connects a plurality of second battery signal lines 600 with a plurality of second battery connection signal lines 602. Accordingly, the signal is sent from the second battery pack BP2 to the control circuit substrate 196, and from the control circuit substrate 196 to the second battery pack BP2 via the second battery joint end 72, the second battery signal line 600, the second battery connection terminal 604, and the second battery connection signal line 602. In the up and down direction, the second battery connection terminal 604 is arranged at a position more upward than the control unit 102. The second battery connection terminal 604 and the first battery connection terminal 596 are arranged in the left-right direction. As shown Fig.51 As shown, the second battery connection terminal 604 is arranged between the second battery joint end 72 and the support plate 184. In the left-right direction, the second battery connection terminal 604 is arranged on the motor 86 (see Fig.41 ) between the right and left ends.

[0390] (Effect)

[0391] The motor unit 10 of this embodiment is detachably mounted on the plate compactor 4b (an example of the first working unit) and the tamping machine 4a (an example of the second working unit), respectively, and operates the plate compactor 4b and the tamping machine 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 main body housing 12 having a first battery mounting portion 22 (an example of a battery mounting portion) to which the battery pack BP is detachably mounted and 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) mounted on the motor housing 84 and rotatably supporting the motor shaft 140. The bearing 142 is arranged at a position further to the rear side than the bearing 144. The distance L11 between the front end of the bearing 144 and the rear end of the bearing 142 is 115 mm or less.

[0392] According to the above configuration, compared with 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 suppress an increase in size of the motor unit 10 .

[0393] In addition, the bearing 144 and the bearing 142 are arranged inside the motor housing 84 .

[0394] According to the above configuration, it is possible to suppress a situation in which a user touches the bearing 144 and the bearing 142 .

[0395] In addition, the motor housing 84 includes: a front bracket 110 (an example of the first component), on which the bearing 144 is installed; and a motor housing body 108 (an example of the second component), which divides a motor housing space 122 (an example of a housing space) for accommodating the motor 86 between the front bracket 110 and the bearing 142 is installed.

[0396] According to the above configuration, compared with a configuration in which the bearing 144 and the bearing 142 are mounted on the same member, it is possible to suppress the configuration of the motor housing 84 from becoming complicated.

[0397] The motor unit 10 further includes a fan 88 fixed to the motor shaft 140 and disposed only outside the motor housing space 122. The motor housing 84 has an air hole 510. Air flows into the motor housing space 122 from the air hole 510 as the fan 88 rotates.

[0398] According to the above configuration, compared with a configuration in which the fan 88 is disposed in the motor housing space 122 , it is possible to suppress an increase in size of the motor housing 84 .

[0399] The motor unit 10 also includes a control unit 102 that operates the motor 86. The air flows from the control unit 102 to the air hole 510 due to the rotation of the fan 88.

[0400] According to the above configuration, the air passes through the control unit 102 and the air holes 510, and then passes through the motor 86. Thus, both the control unit 102 and the motor 86 can be cooled by one air flow.

[0401] In addition, 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 with the motor 86 .

[0402] According to the above configuration, compared with a configuration in which the control unit 102 and the motor 86 do not overlap when the motor unit 10 is viewed in the direction in which the motor shaft 140 extends, it is possible to suppress the motor unit 10 from becoming larger in a direction perpendicular to the direction in which the motor shaft 140 extends.

[0403] In addition, the motor unit 10 further includes a sensor substrate 520 that is disposed in the motor housing space 122 and detects the rotation of the motor 86. The front end portion 140b (an example of a fixing portion) of the motor shaft 140 is fixed to the rammer 4a and the plate compactor 4b, respectively. The bearing 144 is disposed between the front end portion 140b of the motor shaft 140 and the bearing 142. The sensor substrate 520 is fixed to the motor housing body 108.

[0404] According to the above configuration, compared with a configuration in which the sensor substrate 520 is fixed to the front bracket, the sensor substrate 520 can be spaced away from the rammer 4a and the plate compactor 4b.

[0405] In addition, the motor unit 10 further includes a fixing unit 90, which includes a first fixing portion 148 fixed to the plate compactor 4b and a second fixing portion 150 fixed to the tamping machine 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 the plate compactor 4b and the tamping machine 4a, respectively. The front end portion 140b of the motor shaft 140 is substantially parallel to the first fixing portion 148.

[0406] According to the above configuration, when the first fixing portion 148 is fixed to the plate compactor 4b, the front end portion 140b of the motor shaft 140 can be easily fixed to the plate compactor 4b.

[0407] In addition, 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 tamping machine 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 mounted on the first battery mounting portion 22 (an example of a battery mounting portion), the first battery pack BP1 is substantially parallel to the first fixing portion 148 and is arranged at a position higher than the motor 86.

[0408] The motor 86 is a heavy component. In addition, 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 arranged at a position closer to the mounting surface P1 than the first battery pack BP1. Thus, the center of gravity G1 of the motor unit 10 can be brought close to the mounting surface P1.

[0409] In addition, the first battery pack BP1 (an example of a battery pack) can be used in the electric tool 6 .

[0410] According to the above configuration, the motor unit 10 can be operated using the first battery pack BP1 which has high versatility.

[0411] The motor unit 10 also includes an operation switch 78 a (an example of a switch) that receives an operation by a user to control the motor 86 . The operation switch 78 a is disposed on the main body housing 12 .

[0412] According to the above configuration, compared with a configuration in which the operation switch 78 a is disposed in a member other than the main body housing 12 , it is possible to suppress the configuration of the motor unit 10 from becoming complicated.

[0413] The motor unit 10 further includes a control unit 102 for operating 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 case 12. A first switch connection terminal 534 (an example of a terminal) for connecting the first switch signal line 530 and the first switch connection signal line 532 is disposed in a terminal accommodation space 544 (an example of a space) between the upper wall 20c and the control unit 102.

[0414] According to the above configuration, since the first switch connection terminal 534 connecting the first switch signal line 530 and the first switch connection signal line 532 is arranged in the terminal accommodation space 544 between the upper wall 20c and the control unit 102, the terminal accommodation space 544 between the upper wall 20c and the control unit 102 can be effectively utilized.

[0415] The motor unit 10 further includes a motor signal line 566 (an example of a motor wire) extending from the motor 86, and a motor connection signal line 568 (an example of a motor connection wire) extending from the control unit 102 and connected to the motor signal line 566. A second motor connection terminal 570 (an example of a terminal) connecting the motor signal line 566 and the motor connection signal line 568 is arranged in the terminal accommodation space 544 between the upper wall 20c and the control unit 102.

[0416] According to the above configuration, since the second motor connection terminal 570 connecting the motor signal line 566 and the motor connection signal line 568 is arranged in the terminal accommodation space 544 between the upper wall 20c and the control unit 102, the terminal accommodation space 544 between the upper wall 20c and the control unit 102 can be effectively utilized.

[0417] 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 of the permanent magnet 138 is greater than or equal to 1.32 T. The coercive force of the permanent magnet 138 is greater than or equal to 971 kA / m.

[0418] According to the above configuration, the permanent magnet 138 can be made smaller than 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. Thus, the motor unit 10 can be made smaller.

[0419] In addition, the permanent magnet 138 is a neodymium magnet.

[0420] According to the above configuration, the magnetic force of the neodymium magnet is the strongest among the permanent magnets, so the permanent magnet 138 can be further reduced in size. As a result, the motor unit 10 can be reduced in size.

[0421] In addition, 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 .

[0422] According to the above configuration, it is possible to suppress the occurrence of cogging when the motor 86 is operated.

[0423] In addition, the motor unit 10 also includes: a control unit 102, which operates the motor 86; and a first right vibration isolation component 170, a second right vibration isolation component 172, a third right vibration isolation component 174, a first left vibration isolation component 176, a second left vibration isolation component 178 and a third left vibration isolation component 180 (an example of an vibration isolation component), which can be elastically deformed and suppress the transmission of vibration of the motor 86 from the motor 86 toward the first battery mounting part 22, and the transmission of vibration of the motor 86 from the motor 86 toward the control unit 102.

[0424] According to the above configuration, even if the motor 86 vibrates due to the operation of the motor 86, it is possible to suppress the battery pack BP and the control unit 102 from vibrating.

[0425] The motor unit 10 of this embodiment is detachably mounted on the plate compactor 4b (an example of the first working unit) and the tamping machine 4a (an example of the second working unit), and operates the plate compactor 4b and the tamping machine 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) for housing the motor 86 and having an air hole 510; a main body housing 12 having a first battery mounting portion 22 (an example of a battery mounting portion) for detachably mounting the battery pack BP and housing the motor housing 84; a fan 88 fixed to the motor shaft 140 and arranged only outside the motor housing space 122; and a fixing unit 90 having a first fixing portion 148 fixed to the plate compactor 4b and a second fixing portion 150 fixed to the tamping machine 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 housing space 122 in sequence.

[0426] According to the above configuration, the fan 88 is disposed outside the motor housing space 122 , so that the motor housing 84 can be prevented from becoming larger in size. Accordingly, the motor unit 10 can be prevented from becoming larger in size.

[0427] The motor unit 10 also includes a control unit 102 that operates the motor 86. The air flows from the control unit 102 to the air hole 510 due to the rotation of the fan 88.

[0428] According to the above configuration, the air passes through the control unit 102 and the air holes 510, and then passes through the motor 86. According to this, both the control unit 102 and the motor 86 can be cooled by one air flow.

[0429] In addition, 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 with the motor 86 .

[0430] According to the above configuration, compared with a configuration in which the control unit 102 and the motor 86 do not overlap when the motor unit 10 is viewed in the direction in which the motor shaft 140 extends, it is possible to suppress the motor unit 10 from becoming larger in a direction orthogonal to the direction in which the motor shaft 140 extends.

[0431] The motor unit 10 of this embodiment is detachably mounted on the plate compactor 4b (an example of the first working unit) and the tamping machine 4a (an example of the second working unit), and operates the plate compactor 4b and the tamping machine 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 main body housing 12 that includes a first battery mounting portion 22 (an example of a battery mounting portion) to which the battery pack BP is detachably mounted, and that accommodates the motor housing 84 and the control unit 102; a motor signal line 566 (an example of a motor wire) that extends from the motor 86; and a motor connection signal line 568 (an example of a motor connection wire) that extends from the control unit 102 and is connected to the motor signal line 566. The first battery mounting portion 22 is arranged on the upper wall 20c (an example of the first wall) of the main body housing 12. The second motor connection terminal 570 (an example of a terminal) that connects the motor signal line 566 and the motor connection signal line 568 is arranged in the terminal accommodation space 544 (an example of a space) between the upper wall 20 c and the control unit 102 .

[0432] According to the above configuration, since the second motor connection terminal 570 connecting the motor signal line 566 and the motor connection signal line 568 is arranged in the terminal accommodation space 544 between the upper wall 20c and the control unit 102, the terminal accommodation space 544 between the upper wall 20c and the control unit 102 can be effectively utilized.

[0433] The motor unit 10 further includes an action switch 78a (an example of a switch) that receives an operation of a user for controlling the motor 86, a first switch signal line 530 (an example of a switch wire) that extends from the action switch 78a, and a first switch connection signal line 532 (an example of a switch connection wire) that extends from the control unit 102 and is connected to the first switch signal line 530. 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 accommodation space 544 between the upper wall 20c and the control unit 102.

[0434] According to the above configuration, since the first switch connection terminal 534 connecting the first switch signal line 530 and the first switch connection signal line 532 is arranged in the terminal accommodation space 544 between the upper wall 20c and the control unit 102, the terminal accommodation space 544 between the upper wall 20c and the control unit 102 can be effectively utilized.

[0435] The motor unit 10 of this embodiment is detachably mounted on the plate compactor 4b (an example of the first working unit) and the rammer 4a (an example of the 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 main body housing 12 that includes a first battery mounting portion 22 (an example of a battery mounting portion) to which the battery pack BP is detachably mounted and 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 of the permanent magnet 138 is not less than 1.32 T. The coercive force of the permanent magnet 138 is not less than 971 kA / m.

[0436] According to the above configuration, the permanent magnet 138 can be made smaller than 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. Thus, the motor unit 10 can be made smaller.

[0437] In addition, the permanent magnet 138 is a neodymium magnet.

[0438] According to the above configuration, the magnetic force of the neodymium magnet is the strongest among the permanent magnets, so the permanent magnet 138 can be further reduced in size. As a result, the motor unit 10 can be reduced in size.

[0439] In addition, 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 .

[0440] According to the above configuration, it is possible to suppress the occurrence of cogging when the motor 86 is operated.

[0441] (Variation Example)

[0442] The motor unit 10 according to one embodiment may include three or more battery mounting portions. In this case, three or more battery packs BP may be mounted on the main body casing 12 .

[0443] 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 D2 of the second battery pack BP2. Also, the removal direction D2 of the first battery pack BP1 may be different from the removal direction D2 of the second battery pack BP2.

[0444] In the motor unit 10 of the above-described 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 may be four or more.

[0445] In the motor unit 10 of the above-described 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 may be four or more.

[0446] In the motor unit 10 according to one embodiment, the permanent magnet 138 may be a permanent magnet other than a neodymium magnet.

[0447] In the motor unit 10 according to one embodiment, the sensor substrate 520 may be fixed to the front bracket 110 .

[0448] 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.

[0449] The motor unit 10 according to one embodiment may also include a speed reduction mechanism. The speed reduction mechanism is disposed between the outer rotor body 136 of the motor 86 and the motor shaft 140. The speed reduction mechanism reduces the speed of the rotation of the outer rotor body 136 and transmits it to the motor shaft 140. As a result, the rotation speed of the motor shaft 140 is lower than the rotation speed of the outer rotor body 136. The motor shaft 140 is disposed so as to deviate from the outer rotor body 136 in a direction orthogonal to the front-rear direction (for example, the up-down direction and the left-right direction).

Claims

1. A motor unit which is detachably mounted on a plurality of operation units and causes the operation units to operate, characterized in that: The motor unit comprises: a main body casing including a housing portion having a first wall, a first battery mounting portion arranged on the first wall, and a second battery mounting portion arranged on the first wall; and a motor disposed inside the housing portion and causing the operation unit to operate; A first battery for supplying power to the motor is mounted on the first battery mounting portion in a manner that allows sliding along the first wall. A second battery for supplying power to the motor is mounted on the second battery mounting portion in a manner that allows sliding along the first wall. The receiving portion is not arranged between the first battery mounted on the first battery mounting portion and the second battery mounted on the second battery mounting portion, The first storage battery comprises a first side surface, The second battery includes a second side surface that is opposed to the first side surface and is arranged parallel to the first side surface when the first battery is mounted on the first battery mounting portion and the second battery is mounted on the second battery mounting portion.

2. The motor unit according to claim 1, characterized in that The motor unit does not include 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 mounted on the first battery mounting portion and the second battery is mounted on the second battery mounting portion.

3. The motor unit according to claim 1 or 2, characterized in that: When the motor unit is placed on a placement surface, the first wall is arranged on an upper side of the motor.

4. The motor unit according to any one of claims 1 to 3, characterized in that: The first wall includes a first surface for arranging the first battery mounting portion and the second battery mounting portion.

5. The motor unit according to any one of claims 1 to 4, characterized in that: The motor unit further includes an elastically deformable vibration-proof member that is disposed between the motor and the main body housing.

6. The motor unit according to claim 5, characterized in that The motor unit further includes: a motor housing for housing the motor, and a plate member fixed to the motor housing. The vibration-proof member is fixed to the plate member and the main body case.

7. The motor unit according to claim 6, characterized in that The motor unit further includes a control unit that is disposed inside the housing portion and controls the motor, and a support unit that supports the control unit and is fixed to the plate member via the vibration-proof member.

8. The motor unit according to any one of claims 1 to 7, characterized in that: The first storage battery and the second storage battery each include a hook portion operated by a user, The main body housing includes an engaged portion engaged with the hook portion.

9. The motor unit according to any one of claims 1 to 8, characterized in that: When the motor unit is viewed in a direction perpendicular to the first wall, the first battery mounting portion and the second battery mounting portion do not overlap.

10. The motor unit according to any one of claims 1 to 9, characterized in that: The first battery is mounted on the first battery mounting portion so as to be slidable in a first direction along the first wall. The second battery is mounted on the second battery mounting portion so as to be slidable in the first direction. The motor includes a motor shaft extending along the first direction and fixed to the operation unit.

11. The motor unit according to claim 10, characterized in that The motor unit further includes: a control unit that is disposed inside the housing portion and controls the motor. When the motor unit is viewed in the first direction, the control unit at least partially overlaps with the motor.

12. The motor unit according to any one of claims 1 to 11, characterized in that: The motor unit further includes: a fixing portion fixed to the operation unit; The motor is disposed between the fixing portion and the first battery mounting portion, and between the fixing portion and the second battery mounting portion.

13. A motor unit which is detachably mounted on a plurality of operation units and causes the operation units to operate, characterized in that: The motor unit comprises: A main body casing including a housing portion having a first wall, a first battery mounting portion disposed on the first wall, and a second battery mounting portion disposed on the first wall; a motor disposed inside the housing portion and causing the operation unit to operate; as well as A fixing unit including a first fixing portion and a second fixing portion, The first battery mounting portion is mounted with a first battery for supplying power to the motor. The second battery mounting portion is mounted with a second battery for supplying power to the motor. The plurality of operation units include: a first operation unit and a second operation unit different from the first operation unit. The first fixing portion is fixed to the first operation unit. The second fixing portion is fixed to the second operation unit.

14. The motor unit according to claim 13, characterized in that When the motor unit is placed on a placement surface, the first fixing portion is placed on the placement surface. The motor is disposed between the first fixing portion and the first battery mounting portion, and between the first fixing portion and the second battery mounting portion.

15. The motor unit according to claim 13 or 14, characterized in that The motor unit further includes: a motor housing for housing the motor; The second fixing portion is formed on the motor housing.

16. The motor unit according to any one of claims 13 to 15, characterized in that: The first fixing portion includes: a first fixing surface fixed to the first operation unit; The second fixing portion includes: a second fixing surface fixed to the second operation unit; The second fixing surface is substantially orthogonal to the first fixing surface.

17. The motor unit according to any one of claims 13 to 16, characterized in that: The motor unit further includes: a fan disposed inside the housing portion and rotated by the operation of the motor; A first air hole is formed between the receiving portion and the second fixing portion. The second fixing portion is formed with a second air hole, When the fan rotates, air flows into the interior of the housing portion from one of the first air hole and the second air hole, and flows out to the outside of the housing portion from the other of the first air hole and the second air hole.

18. The motor unit according to any one of claims 13 to 17, characterized in that: A rated capacity of the first storage battery is different from a rated capacity of the second storage battery.

19. A working machine, characterized in that: The working machine includes: a tamping machine; and a motor unit detachably mounted on the tamping machine and operable to operate the tamping machine. The motor unit comprises: a main body casing including a housing portion, a first battery mounting portion disposed in the housing portion, and a second battery mounting portion disposed in the housing portion; and a DC motor disposed inside the housing portion and causing the tamping machine to operate; The first battery mounting portion is mounted with a first battery for supplying power to the DC motor. The second battery mounting portion has mounted thereon a second battery for supplying power to the DC motor.

20. A motor unit which is detachably mounted on a first operation unit and a second operation unit and causes the first operation unit and the second operation unit to operate, characterized in that: The motor unit comprises: a motor having a motor shaft; A motor housing having a housing space for housing the motor and having air holes; a main body casing having a battery mounting portion for detachably mounting a battery pack and accommodating the motor casing; a fan fixed to the motor shaft and arranged only outside the accommodation space; as well as a fixing unit including a first fixing portion fixed to the first operation unit and a second fixing portion fixed to the second operation unit, When the fan rotates, air passes through a space inside the main housing and outside the motor housing, the air hole, and the storage space in sequence.

21. The motor unit according to claim 20, characterized in that The motor unit further includes: a control unit for operating the motor. Air flows from the control unit to the air hole by the rotation of the fan.

22. The motor unit according to claim 21, characterized in that When the motor unit is viewed in a direction in which the motor shaft extends, the control unit at least partially overlaps with the motor.

23. A motor unit which is detachably mounted on a first operation unit and a second operation unit and causes the first operation unit and the second operation unit to operate, characterized in that: The motor unit comprises: motor; A motor housing, which supports the motor; a control unit that causes the motor to operate; a main body casing having a battery mounting portion for detachably mounting a battery pack and accommodating the motor casing and the control unit; a motor wire extending from the motor; and a motor connection wire extending from the control unit and connected to the motor wire, The battery mounting portion is arranged on the first wall of the main body casing, A terminal for connecting the motor wire and the motor connection wire is arranged in a space between the first wall and the control unit.

24. The motor unit according to claim 23, characterized in that The motor unit further comprises: a switch that accepts an operation by a user for controlling the motor; a switch wire extending from the switch; and a switch connection wire extending from the control unit and connected to the switch wire, A terminal for connecting the switch wire and the switch connection wire is arranged in the space between the first wall and the control unit.

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