ENGINE UNITS AND WORK MACHINES

Abstract

A motor unit (2) can comprise an output shaft (52), an electric motor (70), a housing (50), a first battery receptacle (54) arranged on the housing (50) and configured to allow a first battery (BP) to be detachably attached to it, a second battery receptacle (90) arranged on a working unit (4) and configured to allow a second battery (BP) to be detachably attached to it, an adapter (82) that can be attached to the first battery receptacle (54) in place of the first battery (BP), a cable (88) extending from the first adapter (82) and configured to connect either to the second battery receptacle (90) or to the second battery (BP), and a control circuit board (74). When the first battery (BP) is attached to the first battery receptacle (54), power can be supplied from the first battery (BP) to the electric motor (70).When the adapter (82) is attached to the first battery holder (54) and the second battery (BP) is attached to the second battery holder (90), power can be supplied from the second battery (BP) to the electric motor (70).

Description

TECHNICAL AREA

[0001] The techniques disclosed herein relate to engine units and working machines (work equipment). STATE OF THE ART

[0002] WO 2020 / 049 617 A1 discloses a motor unit configured to be detachably attached to any of several types of working units for powering the working unit. This motor unit comprises an output shaft configured to connect to the working unit, an electric motor configured to rotate the output shaft that houses the electric motor, a battery receptacle located on the housing and configured to allow a battery to be detachably attached to it, and a control circuit board configured to control an output of the electric motor. When the battery is attached to the battery receptacle, electrical power is supplied from the battery to the electric motor via the battery receptacle. BRIEF SUMMARY

[0003] In the motor unit of WO 2020 / 049 617 A1, the battery, which is attached to the battery holder, is fixed to the housing that contains the electric motor. Therefore, if the housing is subject to vibrations generated by the operation of the electric motor, these vibrations can be transmitted to the battery. For example, the vibrations to which the housing is subject include vibrations from the working unit to the housing. This disclosure provides a technology for reducing the transmission of vibrations from a housing to a battery.

[0004] A motor unit can be configured to be removable and attached to any of different types of work units to drive the work unit to which the motor unit is attached.The motor unit may include an output shaft configured to connect to the working unit, an electric motor configured to rotate the output shaft, a housing to accommodate the electric motor, a first battery receptacle located on the housing and configured to allow a first battery to be removable, a second battery receptacle located on the working unit and configured to allow a second battery to be removable, an adapter configured to attach to the first battery receptacle in place of the first battery, a cable extending from the adapter and configured to connect to either the second battery receptacle or the second battery, and a control circuit board configured to control an output of the electric motor.When the first battery is connected to the first battery terminal, power can be supplied from the first battery to the electric motor via the first battery terminal. When the adapter is connected to the first battery terminal and the second battery is connected to the second battery terminal, power can be supplied from the second battery to the electric motor via the cable, the adapter, and the first battery terminal.

[0005] Another motor unit can be configured to be detachably attached to any of several types of work units to drive the work unit to which the motor unit is attached. The motor unit can include an output shaft configured to connect to the work unit, an electric motor configured to rotate the output shaft, a housing to accommodate the electric motor, a battery receptacle located on the work unit and configured to allow a battery to be detachably attached to it, a cable extending from the housing and configured to connect to either the battery receptacle or the battery, and a control circuit board located within the housing and configured to control an output from the electric motor.When the battery is attached to the battery holder, power can be supplied from the battery to the electric motor via the cable. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 shows a working machine according to a first embodiment, viewed from the upper front left side. Fig. Figure 2 represents a rammer 4a according to the first embodiment as seen from the upper rear left side. Fig. Figure 3 represents a battery pack BP according to the first embodiment. Fig. Figure 4 shows how the battery pack BP is attached to and used on an electric tool T according to the first embodiment. Fig. Figure 5 represents a motor unit 2 according to the first embodiment, viewed from the upper rear left side. Fig. Figure 6 shows the motor unit 2 as seen from the lower front right side according to the first embodiment. Fig. Figure 7 shows a left cross-sectional view of the motor unit 2 according to the first embodiment and shows the interior of the motor unit 2. Fig. Figure 8 shows the motor unit 2 as seen from the upper rear left side according to the first embodiment, with adapters 82 attached to it. Fig. Figure 9 shows the tamper 4a seen from the upper rear left side, with a cover 96 of a second battery receptacle 90a according to the first embodiment in an open state. Fig. 10 represents a body 94 of the second battery receptacle 90a according to the first embodiment as seen from the upper rear left side of the tamper 4a. Fig. 11 represents a working machine according to a second embodiment, viewed from the upper front left side. Fig. 12 represents a battery device BD according to the second embodiment. Fig. 13 represents a second battery receptacle 204a according to the second embodiment. Fig. Figure 14 shows a block diagram illustrating the process of power transmission in the working machines according to the first and second embodiments. Fig. 15 represents a working machine according to a third embodiment, viewed from the upper front left side. Fig. 16 represents a working machine according to a fourth embodiment, viewed from the upper front left side. Fig. Figure 17 shows a block diagram illustrating the process of power transmission in the working machines according to the third and fourth embodiments. Fig. 18 represents a working machine according to a fifth embodiment, viewed from the upper front right side. Fig. Figure 19 represents a working machine according to a sixth embodiment, viewed from the upper front right side. Fig. Figure 20 represents a block diagram illustrating the process of power transmission in the working machines according to the fifth and sixth embodiments. Fig. Figure 21 represents a working machine according to a seventh embodiment, as seen from the upper front right side. Fig. 22 represents a working machine according to an eighth embodiment, viewed from the upper front right side. Fig. Figure 23 shows a block diagram illustrating the process of power transmission in the working machines according to the seventh and eighth embodiments. Fig. Figure 24 represents a working machine according to a ninth embodiment, viewed from the upper front right side. Fig. Figure 25 represents a working machine according to a tenth embodiment, viewed from the upper front right side. Fig. Figure 26 shows a block diagram illustrating the process of power transmission in the working machines according to the ninth and tenth embodiments. Fig. Figure 27 represents a working machine according to an eleventh embodiment, viewed from the upper front right side. Fig. 28 represents a working machine according to a twelfth embodiment, viewed from the upper front right side. Fig. Figure 29 shows a block diagram illustrating the process of power transmission in the working machines according to the eleventh and twelfth embodiments. Fig. Figure 30 represents a working machine according to a thirteenth embodiment, viewed from the upper left side. Fig. Figure 31 represents a working machine according to a fourteenth embodiment, viewed from the upper left side. Fig. Figure 32 represents a block diagram illustrating the process of power transmission in the working machines according to the thirteenth and fourteenth embodiments. Fig. Figure 33 represents a working machine according to a fifteenth embodiment, viewed from the upper front right side. Fig. Figure 34 represents a working machine according to a sixteenth embodiment, viewed from the upper front right side. Fig. Figure 35 presents a block diagram illustrating the process of power transmission in the working machines according to the fifteenth and sixteenth embodiments. Fig. Figure 36 represents a working machine according to a seventeenth embodiment, viewed from the upper front left side. Fig. Figure 37 represents a working machine according to an eighteenth embodiment, viewed from the upper front left side. Fig. Figure 38 presents a block diagram illustrating the process of power transmission in the working machines according to the seventeenth and eighteenth embodiments. DETAILED DESCRIPTION

[0006] In one embodiment of the present teachings, a motor unit can be configured to be removablely attached to any of several types of working units for driving the working unit to which the motor unit is attached.The motor unit may include an output shaft configured to connect to the working unit, an electric motor configured to rotate the output shaft, a housing to accommodate the electric motor, a first battery receptacle located on the housing and configured to allow a first battery to be removable, a second battery receptacle located on the working unit and configured to allow a second battery to be removable, an adapter configured to attach to the first battery receptacle in place of the first battery, a cable extending from the adapter and configured to connect to either the second battery receptacle or the second battery, and a control circuit board configured to control an output of the electric motor.When the first battery is connected to the first battery terminal, power can be supplied from the first battery to the electric motor via the first battery terminal. When the adapter is connected to the first battery terminal and the second battery is connected to the second battery terminal, power can be supplied from the second battery to the electric motor via the cable, the adapter, and the first battery terminal.

[0007] In the configuration described above, the battery can be attached to the second battery holder located on the working unit. Attaching the battery to the second battery holder reduces the transmission of vibrations from the housing to the battery compared to attaching the battery directly to the housing.

[0008] In one embodiment of the present teachings, a further motor unit can be configured to be detachably attached to any of several types of working units for driving the working unit to which the motor unit is attached. The motor unit can comprise an output shaft configured to connect to the working unit, an electric motor configured to rotate the output shaft, a housing for the electric motor, a battery receptacle located on the working unit and configured to allow a battery to be detachably attached to it, a cable extending from the housing and configured to connect either to the battery receptacle or to the battery, and a control circuit board located in the housing and configured to control an output of the electric motor.When the battery is attached to the battery holder, power can be supplied from the battery to the electric motor via the cable.

[0009] In the configuration described above, the battery can be mounted on the battery holder located on the working unit. Mounting the battery on the battery holder reduces the transmission of vibrations from the housing to the battery compared to mounting the battery directly to the housing.

[0010] In one embodiment of the present teachings, the control circuit board can be arranged in the housing.

[0011] A fan for cooling the electric motor can be located within the housing. In the configuration described above, both the control board and the electric motor can be cooled by the cooling airflow generated by the fan. This eliminates the need for a separate fan for cooling the control board within the motor unit, thus simplifying the motor unit's configuration.

[0012] In one embodiment of the present teachings, the motor unit can further comprise a first surface parallel to an axial direction of the output shaft and a second surface perpendicular to the axial direction of the output shaft. The motor unit can be configured such that it is fixed to the working unit with at least one of the first surface and the second surface in contact with the working unit.

[0013] In the configuration described above, the motor unit can be attached to the working unit in various orientations (positions) (e.g., with the first surface in contact with the working unit, with the second surface in contact with the working unit, etc.). This leads to an increase in the number of types of working units to which the motor unit can be attached.

[0014] In one embodiment of the present teachings, at least one of the first battery and the second battery can supply power to an electrical device that is different from the motor unit, if the at least one of the first battery and the second battery is located away from the motor unit and attached to the electrical device and to the device.

[0015] The configuration described above allows at least one battery to be used not only in the motor unit, but also in the electrical device, which is different from the motor unit.

[0016] In one embodiment of the present teachings, the second battery can comprise a plurality of second batteries. The plurality of second batteries can comprise a plurality of battery packs. The second battery receptacle can be configured to allow the plurality of battery packs to be detachably attached to it.

[0017] Since multiple battery packs can be connected to the second battery mount in the configuration described above, the electric motor can operate using the power from multiple battery packs. This allows for an increase in the electric motor's output compared to an electric motor operating with the power from a single battery pack. Therefore, the motor unit can be used with work units that require high output. In other words, the configuration described above increases the number of work unit types for which the motor unit is applicable.

[0018] In one embodiment of the present teachings, the second battery can comprise a battery pack. The motor unit can further comprise a cover that conceals the battery pack, which is attached to the second battery receptacle.

[0019] The configuration described above protects the battery pack, which is attached to the second battery holder, from external water and dust.

[0020] In one embodiment of the present teachings, the working unit may have a handle configured to be gripped by a user. The second battery receptacle may be located on the handle.

[0021] In the configuration described above, the second battery compartment is located on the handle. The handle can be configured to reduce the transmission of vibrations from the body of the work unit, thus minimizing discomfort for the user gripping the handle. Therefore, mounting the battery in the second battery compartment reduces the transmission of vibrations from the work unit to the battery. Furthermore, in the configuration described above, the second battery compartment is positioned for easy user access. This allows the user to easily insert and remove the battery from the second battery compartment.

[0022] In one embodiment of the present teachings, the second battery receptacle can be located on an upper surface of the working unit when the working unit is in a working orientation (working position).

[0023] In the configuration described above, the second battery compartment is located in a position that is easily accessible to the user when the work unit is in a working position (working orientation). This allows the user to easily attach the battery to and remove the battery from the second battery compartment.

[0024] In one embodiment of the present teachings, the first battery receptacle and the second battery receptacle can each have common components, and the common components can have a common shape relative to each other.

[0025] The configuration described above allows for the use of common components in both the first and second battery mounts. This enables a reduction in the manufacturing costs of the motor unit.

[0026] In one embodiment of the present teachings, the cable length can be in a range of 100 mm to 2000 mm. For example, the cable length can be in a range of 1000 mm to 2000 mm, 1300 mm to 2000 mm, 1000 mm to 1500 mm, or 1300 mm to 1500 mm.

[0027] The cable runs between the first battery holder, located on the housing, and the second battery holder, located at the work unit. If the cable length were too long relative to the distance between the first and second battery holders, it could sag excessively and obstruct the user during use. Although the distance between the first and second battery holders varies depending on the type of work unit, it is generally expected to range from 50 mm to 1500 mm. In the configuration described above, the cable length is only slightly longer (greater) than the expected distance between the first and second battery holders. Thus, the configuration described above prevents the cable from sagging excessively and therefore from obstructing the user during use.

[0028] In one embodiment of the present teachings, the adapter can be configured to be removable and attached to the first battery receptacle.

[0029] If the adapter were configured to attach to the first battery compartment in a non-removable manner, it could not be removed once attached. However, the user might wish to remove the adapter after attaching it. For example, the user might want to attach the first battery directly to the compartment instead of the adapter. In the configuration described above, the adapter is removable. Therefore, it can be removed once attached, allowing the first battery to be attached directly to the compartment instead of the adapter.

[0030] In one embodiment of the present teachings, the working unit can function as a rammer configured for tamping (ramming) soil. The working unit can have a handle configured for gripping by a user. The second battery compartment can be located on the handle.

[0031] In the configuration described above, the battery is attached to the rammer's handle. This reduces the transmission of vibrations from the housing to the battery and also reduces the transmission of vibrations from the rammer body to the battery.

[0032] In one embodiment of the present teachings, the working unit can function as a plate compactor configured to compact soil. The working unit can have a handle configured for gripping by a user. The second battery receptacle can be located on the handle.

[0033] In the configuration described above, the battery is attached to the handle of the plate compressor. This reduces the transmission of vibrations from the housing to the battery and also reduces the transmission of vibrations from the body of the plate compressor to the battery.

[0034] In one embodiment of the present teachings, the working unit can function as a trowel configured for smoothing (leveling) a concrete surface. The working unit can have a handle configured for gripping by a user. The second battery holder can be located on the handle.

[0035] In the configuration described above, the battery is attached to the handle of the trowel. This reduces the transmission of vibrations from the housing to the battery and also reduces the transmission of vibrations from the body of the trowel to the battery.

[0036] In one embodiment of the present teachings, the working unit can function as a concrete mixer configured to mix concrete. The working unit can have a handle configured to be gripped by a user. The second battery receptacle can be located on the handle.

[0037] In the configuration described above, the battery is mounted on the handle of the concrete mixer. This reduces the transmission of vibrations from the housing to the battery and also reduces the transmission of vibrations from the body of the concrete mixer to the battery.

[0038] In one embodiment of the present teachings, the working unit can function as a concrete saw configured to cut concrete. The working unit can have a handle configured to be gripped by a user. The second battery holder can be located on the handle.

[0039] In the configuration described above, the battery is attached to the handle of the concrete saw. This reduces the transmission of vibrations from the housing to the battery and also reduces the transmission of vibrations from the body of the concrete saw to the battery.

[0040] In one embodiment of the present teachings, the working unit can function as a spraying device configured to increase the pressure of a liquid and spray the liquid. The second battery receptacle can be located on an upper surface of the working unit when the working unit is in a working orientation (working position).

[0041] In the configuration described above, the battery is mounted on the upper surface of the spraying device. This reduces the transmission of vibrations from the housing to the battery.

[0042] In one embodiment of the present teachings, the working unit can function as a mowing machine. The working unit can have a handle configured to be gripped by a user. The second battery compartment can be located on the handle.

[0043] In the configuration described above, the battery is located on the handle of the mower. This reduces the transmission of vibrations from the housing to the battery and also reduces the transmission of vibrations from the body of the mower to the battery.

[0044] In one embodiment of the present teachings, the working machine may have a working unit and a motor unit configured to be attached to the working unit for driving the working unit.

[0045] The configuration described above provides the working machine, which reduces the transmission of vibrations from the housing to the battery.

[0046] Representative, non-limiting examples of the present disclosure are described in detail below with reference to the accompanying drawings. This detailed description is intended solely to provide a person skilled in the art with further details for carrying out preferred aspects of the present teachings and is not intended to limit the scope of protection of the present disclosure. Furthermore, each of the additional features and teachings disclosed below may be used separately or in combination with other features and teachings to provide improved engine units and working machines, and methods for manufacturing and using them.

[0047] Furthermore, combinations of features and steps described in detail below may not be necessary to carry out the present disclosure in the broadest sense and are instead taught only to describe preferred examples of the present disclosure in particular. Moreover, various features of the representative examples and of the independent and dependent claims described above and below may be combined in ways not specifically and explicitly listed to provide additional usable embodiments of the present teachings.

[0048] All features disclosed in the description and / or the claims shall be considered separate and independent of one another for the purpose of original disclosure and also for the purpose of limiting the claimed invention, irrespective of the combination of features in the embodiments and / or the claims. Furthermore, all range specifications or specifications of groups of units shall disclose any possible intermediate value or subgroups of units for the purpose of original disclosure and also for the purpose of limiting the claimed invention. First embodiment

[0049] A work machine that is in Fig. Figure 1 shows a motor unit 2 and a working unit 4 (which in this embodiment is a rammer (piling device; "rammer") 4a). The motor unit 2 is configured to be removable from the working unit 4. The motor unit 2 is a drive unit configured to drive an output shaft 52 (see Figure 1). Fig. 6) using power supplied by a BP battery pack (see Fig. 3) and / or the like, rotates. The working unit 4 is a machine component configured to convert the rotary motion of the output shaft 52 into a predetermined motion (e.g., reciprocating) to perform work (e.g., tamping (ramming) the soil). Instead of the motor unit 2, a motor unit (machine motor unit) (not shown) can be attached to the working unit 4. The motor unit can be any motor unit compatible with the motor unit 2, such as a GX120 motor unit from Honda R&D Co., Ltd. Rammer 4a configuration

[0050] As in Fig. As shown in Figure 2, the rammer 4a has a working part 6 configured to tamp the ground, an upper housing 8 supporting the upper part of the working part 6, and a handle 10 located on the top of the upper housing 8. The upper housing 8 has a mounting base 12 to which the motor unit 2 (see Figure 2) is attached. Fig. 2) is attached, and an opening 14 for receiving the output shaft 52 (see Fig. 6) of the motor unit 2. The working part 6 has an extendable (retractable) section 16 that is extendable in an up-down direction and a bottom tamping plate 18 that is fixed to the lower end of the extendable section 16. A crank mechanism for converting the rotary motion of the output shaft 52 into a reciprocating motion is incorporated within the upper housing 8, although this is not shown. The extendable section 16 extends and contracts in the up-down direction according to the reciprocating motion of the crank mechanism. The rammer 4a extends and contracts the extendable section 16 in the up-down direction, with the bottom tamping plate 18 facing the ground so that the bottom tamping plate 18 is repeatedly pressed against the ground. The rammer 4a thus tamps the ground.In this embodiment, a front-back direction, an up-down direction, and a left-right direction of the rammer 4a are defined based on the vertical direction of the rammer 4a in its working orientation (working position). Specifically, when the bottom tamping plate 18 is placed on a horizontal surface, the vertical direction is defined as the up-down direction of the rammer 4a; a direction perpendicular to the up-down direction and pointing towards the mounting base 12 is defined as the rear direction; the opposite direction to the rear direction is defined as the front direction; and a direction perpendicular to both the front-back and up-down directions is defined as the right-left direction.

[0051] The handle 10 comprises a first handle 20, a second handle 22, and a third handle 24. The first handle 20 extends rearward from the upper end of the upper housing 8, bends and extends to the right, and then bends and extends forward. The second handle 22 extends upward from the upper end of the upper housing 8, bends and extends to the right, and then bends and extends downward. The third handle 24 extends forward and downward from the upper end of the upper housing 8, bends and extends to the right, and then bends and extends rearward and upward. The first handle 20, the second handle 22, and the third handle 24 are integral components. At least one of the first handle 20, the second handle 22, or the third handle 24 is gripped by a user during the use of the tamper 4a. Battery pack BP configuration

[0052] As in Fig. As shown in Figure 3, the battery pack BP comprises a battery housing 30 configured to hold a plurality of rechargeable secondary battery cells (e.g., lithium-ion battery cells) and a hook 34 movably held by the battery housing 30. The hook 34 has an engagement area 38 and an actuating area 40. The engagement area 38 normally extends out of the battery housing 30. When the actuating area 40 is pressed into the battery housing 30, the entire engagement area 38 moves into the battery housing 30. Furthermore, the battery housing 30 defines slots 32 and guide rails 36. The slots 32 connect the inside of the battery housing 30 to its outside. The slots 32 are configured to align with the positions of battery terminals (not shown) accommodated in the battery housing 30.The majority of the second battery cells are charged and discharged via these battery terminals. The BP battery pack is removable at battery mounts 54 and 90a (as described below, see figure). Fig. 5 and Fig. 10) attachable and supply power to motor unit 2 (see Fig. 1).

[0053] As in Fig. As shown in Figure 4, the battery pack BP can be removed from the motor unit 2 and attached to an electric tool T to supply power to the electric tool T. The electric tool T is a rebar tying tool configured to tie multiple rebars R with a wire W. Similarly, the battery pack BP can also be used with other electric tools T besides the rebar tying tool (e.g., impact wrenches, circular saws, screwdrivers, etc.). The battery pack BP can also be used with garden equipment (e.g., lawn trimmers, blowers, hedge trimmers, chainsaws, wheelbarrows, snowplows, rotary tillers, etc.). Configuration of motor unit 2

[0054] As in Fig. 5 and Fig. As shown in Figure 6, the motor unit 2 has a substantially cuboid housing 50. As in Fig. As shown in Figure 5, a first battery receptacle 54 is arranged on the upper surface of the housing 50 and configured to allow the battery pack BP to be inserted (see Figure 5). Fig. 3) to be attached to it in a removable manner. As in Fig. As shown in Figure 6, the output shaft 52 projects from the front surface of the housing 50. In this embodiment, regardless of the front-back, up-down, and right-left directions of the tamper 4a as defined above, a front-back direction, an up-down direction, and a right-left direction of the motor unit 2 are defined based on the housing 50.Specifically, the direction in which the output shaft 52 extends is defined as the front-back direction; the direction in which the output shaft 52 projects from the housing 50 is defined as the front direction (direction forward); the direction opposite to the front direction is defined as the rear direction (direction backward); a direction perpendicular to the front-back direction and toward which the first battery receptacle 54 is directed is defined as the upward direction (top direction); the opposite direction to the upward direction is defined as the downward direction (bottom direction); and a direction perpendicular to both the front-back direction and the top-down direction is defined as the right-left direction. Fig. 5, Fig. 6, Fig. 7 and Fig. 8, which focus on the housing 50, are the direction indicators based on the housing 50, while in Fig. 1, Fig. 2, Fig. 9, Fig. 10 and Fig. 11, which focus on the Stamper 4a, are the direction indicators based on the Stamper 4a.

[0055] As in Fig. As shown in Figure 7, the motor unit 2 further comprises an electric motor 70, a fan wheel 72, and a control circuit board 74. The housing 50 accommodates the electric motor 70, the fan wheel 72, and the control circuit board 74. When the motor unit 2 is attached to the tamper 4a (i.e., in the state shown in Figure 7), the motor unit 2 is mounted on the tamper 4a. Fig. (as shown in Figure 1), is a front area of ​​the output shaft 52 inside the upper housing 8 via the opening 14 (see Figure 1). Fig. 2) and coupled to the crank mechanism (not shown) for expanding and contracting the expandable area 16. The electric motor 70 has a rotor 78 fixed to the output shaft 52, a stator 80 arranged radially inside the rotor 78, and a bracket 81 fixed to a front portion of the stator 80. The electric motor 70 is a so-called external rotor type electric motor. The stator 80 and the bracket 81 support the output shaft 52 via a bearing 76, so that the output shaft 52 is rotatable about a shaft axis of rotation A. The electric motor 70 rotates the output shaft 52 about the shaft axis of rotation A. The control switching board 74 is offset to the rear of the output shaft 52. The control switching board 74 is oriented (aligned) such that its thickness direction coincides with the front-to-back direction. The control circuit board 74 is electrically connected to connection terminals 46 (see Fig. 5) the first battery terminal 54 is connected. The control board 74 sets a power supply to the connection terminals 46 and delivers the set power to the electric motor 70. Thus, the control board 74 controls the output of the electric motor 70. The fan wheel 72 is located behind the rotor 78 and is fixed to the output shaft 52. The fan wheel 72 rotates with the output shaft 52 to generate a cooling airflow for cooling the electric motor 70 and the control board 74. The cooling airflow referred to here is specifically an airflow that enters the housing 50 from the outside of the housing 50, flows between the electric motor 70 and the control board 74, and then flows from the inside of the housing 50 to the outside of the housing 50.The cooling airflow removes (conducts) heat generated by each of the electric motor 70 and the control circuit board 74 to the outside of the housing 50.

[0056] As in Fig. Figure 6 shows a front mounting area 56 for mounting the mounting base 12 (see Fig. 2) arranged on the front surface of the bracket 81. The front mounting area 56 has a front contact surface 58 configured to touch (be in contact with) the rear surface of the mounting base 12, and a plurality of screw holes 60. The front contact surface 58 is perpendicular to the axial direction of the output shaft 52. As shown in Fig. As shown in Figure 2, the mounting base 12 defines a plurality of through holes 62, which are positioned such that they are aligned with the plurality of screw holes 60. By inserting screws into the plurality of through holes 62 and tightening the screws into the plurality of screw holes 60, the motor unit 2 is attached to the rammer 4a with its front contact surface 58 in contact with the rear surface of the mounting base 12. Furthermore, as shown in Fig. As shown in Figure 6, a lower mounting area 64 is arranged on the lower surface of the stator 80, and the lower mounting area 64 is designed for mounting on a different mounting base (e.g. a mounting base 328 (see Figure 6)). Fig. 18), which is described in the fifth embodiment) as the mounting base 12. The lower mounting area 64 has a lower contact surface 66 configured to contact the upper surface of the mounting base and a plurality of screw holes 68. The lower contact surface 66 is parallel to the axial direction of the output shaft 52.

[0057] As in Fig. As shown in Figure 5, the first battery holder has 54 guide grooves 42 configured to guide the guide rails 36 (see Figure 5). Fig. 3) to receive each battery pack BP along the front-back direction in a sliding manner, engagement grooves 44 configured to engage with the engagement area 38 (see Fig. 3) to engage the hook 34 of the battery pack BP, and connect the connection terminals 46 to the battery terminals (not shown) of the battery pack BP.

[0058] To attach the battery pack BP to the first battery receptacle 54, the battery pack BP is moved forward towards the first battery receptacle 54. As a result, the guide rails 36 (see Fig. 3) into the guide grooves 42, and the engagement area 38 (see Fig. 3) engages with the engagement groove 44, thus completing the attachment of the battery pack BP. When the battery pack BP is in the position attached to the first battery receptacle 54, the connection terminals 46 inside the battery housing 30 (see Fig. 3) via the slots 32 (see Fig. 3) and engage with the corresponding battery terminals. Thus, the battery terminals and the connecting terminals 46 are electrically connected. To remove the battery pack BP from the first battery receptacle 54, the actuating area 40 is pressed from the engagement groove 44 to unlock the engagement area 38, and then the battery pack BP is moved backward away from the first battery receptacle 54. Consequently, the guide rails 36 are pulled out of the guide grooves 42, thus completing the removal of the battery pack BP.

[0059] The first battery receptacle 54 has two sets of guide grooves 42, two engagement grooves 44, and two sets of connection terminals 46. Thus, the first battery receptacle 54 is configured to allow two battery packs BP to be attached to it.

[0060] As in Fig. As shown in Figure 8, the motor unit 2 also includes adapters 82. The adapters 82 can be attached to the first battery receptacle 54 instead of the battery packs BP (see Figure 8). Fig. 3) are attached. Similar to the BP battery packs, each adapter has 82 guide rails (not shown) configured to engage in the guide grooves 42 (see Fig. 5 and Fig. 10), a hook 84 which is configured to engage with the engagement groove 44 (see Fig. 5 and Fig. 10) to be engaged, and adapter connections (not shown) corresponding to the connection terminals 46 (see Fig. 5 and Fig. 10). Thus, the adapters 82 are configured to be removable and attached to the first battery receptacle 54, similar to the battery packs BP. The adapters 82 differ from the battery packs BP in that they do not have secondary battery cells. Each adapter 82 is connected to one end of the cable 88 via a connection 86. Each connection 86 is rotatable about a pivot axis extending in the right-left direction relative to the corresponding adapter 82. Each cable 88 is electrically connected to the connection terminals 46 of the first battery receptacle 54 via the adapter terminals. The other ends of the cables 88 are connected to a second battery receptacle 90a, which is located in Fig. As shown in Figure 9, the cables 88 are connected. The length of the cables 88 is, for example, in a range of 100 mm to 2000 mm or can be in a range of 400 mm to 500 mm. In this embodiment, the length of the cables 88 is 450 mm.

[0061] As in Fig. As shown in Figure 9, the second battery receptacle 90a has a base 92 mounted on the handle 10 of the rammer 4a, a body 94 to which the battery packs BP are attached, and a cover 96 configured to cover the battery packs BP attached to the body 94. The cover 96 has a front cover area 98 for covering the front portions of the battery packs BP attached to the body 94 and a rear cover area 100 for covering the rear portions of the battery packs BP attached to the body 94. The front cover area 98 is fixed to the body 94. The rear cover area 100 is pivotable about a pivot axis extending in the right-left direction relative to the front cover area 98.A locking bar 104 is arranged on the outer surface of the rear cover area 100 and is configured to engage with a locking bar receptacle 102 formed on the body 94. As shown in . Fig. As shown in Figure 1, when the latch 104 is engaged with the latch receptacle 102, the battery packs BP attached to the body 94 are completely covered by the front cover area 98 and the rear cover area 100. The state of the cover 96, which is shown in Fig. Figure 1 can be described as a closed state. The cover 96, in the closed state, can provide protection for the BP battery packs against external water and dust. In contrast, as shown in Fig. Figure 9 shows that after the latch 104 was unlocked from the latch receptacle 102 and the rear cover area 100 was moved upwards, the rear areas of the battery packs BP were exposed to the outside. The condition of the cover 96, which is shown in Fig. The cover 96 shown in Figure 9 can be described as an open state. In this open state, the cover 96 allows the battery packs BP to be attached to and removed from the body 94. The user puts the cover 96 into the open state when they wish to attach / remove the battery packs BP from the body 94, but otherwise keeps the cover 96 in the closed state.

[0062] As in Fig. As shown in Figure 10, the base 92 features a left passing area 108 configured with left projections 106 (see Fig. 2), which is located on a left area of ​​the first grip 20, to fit a right passing area 112, which is configured to have right projections 110 (see Fig. 2), which are arranged on a right-hand area of ​​the first handle 20, and a plate area 114 extending between the left-hand fitting area 108 and the right-hand fitting area 112. The left-hand fitting area 108 is attached to the left-hand projections 106 with screws. The right-hand fitting area 112 is attached to the right-hand projections 110 with screws. The body 94 is fixed to the upper surface of the plate area 114.

[0063] The body 94 has two sets of guide grooves 42, two engagement grooves 44, and two sets of connecting terminals 46. The guide grooves 42, the engagement grooves 44, and the connecting terminals 46 of the body 94 have the same functions as the functions of the corresponding elements of the first battery receptacle 54 (see Fig. 5) on. Thus, the second battery holder 90a is configured to allow two BP battery packs to be attached to it.

[0064] To attach the battery packs BP to the second battery holder 90a, each battery pack BP is moved forward towards the second battery holder 90a. Consequently, the guide rails 36 (see Fig. 3) into the guide grooves 42, and the engagement area 38 (see Fig. 3) engages with the engagement groove 44, thus completing the attachment of the battery pack BP. When the battery pack BP is in the position attached to the second battery receptacle 90a, the connection terminals 46 inside the battery housing 30 (see Fig. 3) via the slots 32 (see Fig. 3) and engage with the corresponding battery terminals. Thus, the battery terminals and the connecting terminals 46 are electrically connected to each other. To remove the battery pack BP from the second battery receptacle 90a, the actuating area 40 is pressed to unlock the engagement area 38 from the engagement groove 44, and then the battery pack BP is moved backward away from the second battery receptacle 90a. Consequently, the guide rails 36 are pulled out of the guide grooves 42, thus completing the removal of the battery pack BP. When the battery packs BP are attached to or removed from the second battery receptacles 90a, the user standing behind the rammer 4a can handle the battery packs BP close to their body. Thus, the user standing behind the rammer 4a can easily attach and remove the battery packs BP.

[0065] The connecting terminals 46 of the body 94 and the connecting terminals 46 (see Fig. 5) The first battery compartment 54 contains identical components.

[0066] The other ends of the cables 88 are connected to a front section of the body 94. The cables 88 are electrically connected to the battery terminals of the battery packs BP, which are attached to the second battery mount 90a, via the connection terminals 46 of the second battery mount 90a. Thus, power from the battery packs BP is supplied to the electric motor 70 via the second battery mount 90a, the cables 88, the adapters 82, and the first battery mount 54.

[0067] In the motor unit 2 according to this embodiment, the adapters 82 can be removed from the first battery receptacle 54, and the battery packs BP can be attached to the first battery receptacle 54 instead, although this is not shown. In this case, the power of the battery packs BP attached to the first battery receptacle 54 is supplied to the electric motor 70 via the first battery receptacle 54.

[0068] As in Fig. As shown in Figure 5, the motor unit 2 further comprises a main power switch 116, an activation switch 118, and a rotation adjustment switch 120. The main power switch 116, the activation switch 118, and the rotation adjustment switch 120 are located on the upper surface of the housing 50 and behind the first battery receptacle 54. The user can turn the main power of the motor unit 2 on or off by actuating the main power switch 116. When the main power of the motor unit 2 is on, the user can drive or stop the electric motor 70 by actuating the activation switch 118. When the main power of the motor unit 2 is on, the user can adjust the rotational speed of the output shaft 52 by actuating the rotation adjustment switch 120. Second embodiment

[0069] As in Fig. As shown in Figure 11, in this embodiment a working machine has a working unit 4, which is the same as that of the first embodiment (i.e., the rammer 4a), and a motor unit 202. The motor unit 202 differs from the motor unit 2 in the first embodiment in that the motor unit 202 has a second battery receptacle 204a, which differs from the second battery receptacle 90a (see Figure 11). Fig. 1). The working machine according to the second embodiment is described below, focusing on this difference (i.e., the configuration of the second battery receptacle 204a). The same elements between the first and second embodiments are designated with the same reference numerals, and their descriptions are omitted.

[0070] The second battery receptacle 204a is configured to allow a battery device BD to be detachably attached to it. As shown in Fig. As shown in Figure 12, the battery device BD has a substantially cuboid shape. The battery device BD comprises a battery housing 252, a handle 254, a main power switch 256, and a charging connector 258. A plurality of rechargeable secondary battery cells (lithium-ion battery cells) are housed in the battery housing 252. The handle 254 is located at a rear portion of the battery housing 252. After the battery device BD has been removed from the second battery receptacle 204a, the user can carry the battery device BD by grasping the handle 254. The main power switch 256 is located on the left surface of the battery housing 252. The user can turn the main power of the battery device BD on or off by actuating the main power switch 256. The charging connector 258 is located on the left surface of the battery housing 252 and at the front of the main power switch 256.The user can insert a charging plug (not shown), connected to an external power source, into charging connector 258 to charge multiple secondary battery cells using power supplied by the external power source. It is noted that the directional indicator in . Fig. 12 of the direction indicator in Fig. 11 corresponds (i.e., the front-back direction, the up-down direction, and the right-left direction of the tamper 4a).

[0071] In this embodiment, the cables 88 are connected to the battery device BD instead of to the second battery receptacle 204a. Thus, the power of the battery device BD is supplied to the electric motor 70 (see Fig. 7) through the cables 88, the adapters 82 (see Fig. 11) and the first battery compartment 54 (see Fig. 11) supplied. Cables 88 extend from a front area of ​​the battery device BD.

[0072] As in Fig. As shown in Figure 13, the second battery receptacle 204a has a base 206, which is mounted on the handle 10 of the tamper 4a, and a body 208 to which the battery device BD is attached. The base 206 has a left-hand pass area 210, which is configured to engage the left-hand projections 106 (see Figure 13). Fig. 2) to be passed, which are arranged on the left area of ​​the first grip 20, a right passing area 212 which is configured to pass onto the right projections 110 (see Fig. 2) to be fitted, which are arranged on the right area of ​​the first handle 20, and a plate area 214 extending between the left fitting area 210 and the right fitting area 212. The left fitting area 210 is fastened to the left projections 106 with screws. The right fitting area 212 is fastened to the right projections 110 with screws. The body 208 is fixed to the upper surface of the plate area 214.

[0073] As in Fig. As shown in Figure 12, the battery device BD has engagement claws 260 for engagement with the body 208 of the second battery receptacle 204a and a latch 262 that can be actuated by a user. The engagement claws 260 are arranged at a front area of ​​the battery housing 252. The latch 262 is arranged at a rear area of ​​the battery housing 252. ... Fig. As shown in Figure 13, the body 208 has claw receptacles 216, which correspond to the engagement claws 260 of the battery device BD, and a latch receptacle 218, which corresponds to the latch 262 of the battery device BD. The user can attach the battery device BD to the second battery receptacle 204a by engaging the engagement claws 260 with the claw receptacles 216 and likewise by engaging the latch 262 with the latch receptacle 218. When the battery device BD is in the attached position on the second battery receptacle 204a, the user can unlock the latch 262 from the latch receptacle 218 by actuating the latch 262. The user can remove the battery device BD from the second battery receptacle 204a by pulling out the engagement claws 260 from the claw receptacles 216 after unlocking the latch 262 from the latch receptacle 218.

[0074] As in Fig. As shown in Figure 11, the battery device BD is attached to the second battery mount 204a such that its longitudinal direction is along the front-back direction of the rammer 4a. The battery device BD is attached to the second battery mount 204a such that the latch 262 (see Figure 11) Fig. 12) points to the rear. Thus, the latch 262 is positioned for the user standing behind the tamper 4a to easily operate it. Therefore, the user standing behind the tamper 4a can easily attach or remove the battery device BD.

[0075] The battery device BD can be detached from the second battery holder 204a and attached to a backpack (not shown) worn on the user's back. In this case, the user wearing the backpack can access the adapters 82 (see Fig. 11) on a different electrical tool (e.g., the electrical tool T, which is in Fig. 4 shown) attach to the motor unit 2 to supply power from the battery device BD to the electric tool T.

[0076] Fig. Figure 14 schematically shows a power transmission sequence in the working machines according to the first and second embodiments. The working machines according to the first and second embodiments drive the motor units 2, 202 (i.e., the electric motor 70) to rotate the output shaft 52. The working machines reduce the rotary motion of the output shaft 52 via a speed reduction device and convert it into a linear motion via the crank mechanism to deliver impacts through the floor tamping plate 18 (i.e., floor tamping process). Third embodiment

[0077] As in Fig. As shown in Figure 15, a working machine according to this embodiment comprises a plate compactor 4b and a motor unit 2. The motor unit 2 is similar to the one described in the first embodiment.

[0078] The plate compactor 4b has a body 300 and a handle 302 mounted on the body 300. The handle 302 has a grip 304, which is gripped by the user during operation of the machine, and two support brackets 306 extending between the grip 304 and the body 300. The body 300 has a mounting base 308, to which the motor unit 2 is attached, and a soil compactor plate 310, which is driven by the motor unit 2. The mounting base 308 is the same as the mounting base 12 described in the first embodiment. Thus, the front mounting area 56 (see Fig. 6) the motor unit 2 is attached to the mounting base 308. If the electric motor 70 (see Fig. 7) When the motor unit 2 is operating (working), a vibration excitation mechanism (e.g., an eccentric weight) mounted on the soil ramming plate 310 is activated, causing the soil compactor plate 310 to oscillate in an up-down direction. The plate compactor 4b oscillates the soil ramming plate 310 in an up-down direction with the soil ramming plate 310 pointing towards the ground, repeatedly pressing the soil ramming plate 310 against the ground. The plate compactor 4b compacts the soil in this way. Fig. Figure 17 schematically shows a power transmission sequence in the working machine according to the embodiment described above.

[0079] In this embodiment, a front-back direction, an up-down direction, and a left-right direction of the plate compactor 4b are defined based on a working position of the plate compactor 4b. Specifically, the vertical direction when the ground ramming plate 310 is placed on a horizontal surface is defined as the up-down direction of the plate compactor 4b; a direction perpendicular to the up-down direction and extending from the handle 304 towards the body 300 is defined as the forward direction; the opposite direction to the forward direction is defined as the rear direction; and a direction perpendicular to both the front-back and up-down directions is defined as the right-left direction.

[0080] In this embodiment, the motor unit 2 has a second battery receptacle 90b corresponding to the plate compressor 4b instead of the second battery receptacle 90b (see Fig. 5), as described in the first embodiment. The second battery receptacle 90b is attached to the two support brackets 306 of the plate compactor 4b to bridge the gap between them. The two support brackets 306 extend upwards and backwards from the body 300 and are connected to the handle 304. Similar to the second battery receptacle 90a in the first embodiment, the second battery receptacle 90b is configured to allow two battery packs BP to be attached to it. The battery packs BP are attached to the second battery receptacle 90b by sliding them forwards and downwards toward the second battery receptacle 90b. The battery packs BP are removed from the second battery receptacle 90b by sliding them backwards and upwards away from the second battery receptacle 90b.Therefore, when attaching or removing the BP battery pack from the second battery holder 90b, the user standing behind the plate compactor 4b can handle the BP battery pack close to their body. This allows the user standing behind the plate compactor 4b to easily attach and remove the BP battery pack.

[0081] Each adapter 82 is attached to the first battery receptacle 54 by sliding it to the left, towards the first battery receptacle 54. The adapter 82 is removed from the first battery receptacle 54 by sliding it to the right, away from the first battery receptacle 54. In this embodiment, the first battery receptacle 54 is located in a position that is easily accessible to the user (on the upper surface of the plate compactor 4b). Thus, the user can easily attach and remove the adapter 82. Fourth embodiment

[0082] As in Fig. As shown in Figure 16, a working machine according to this embodiment comprises a plate compressor 4b and a motor unit 202. The plate compressor 4b is similar to the one described in the third embodiment, and the motor unit 202 is similar to the one described in the second embodiment.

[0083] In this embodiment, the motor unit 202 has a second battery receptacle 204b corresponding to the plate compressor 4b instead of the second battery receptacle 204a (see Fig. 13) as described in the second embodiment. The second battery receptacle 204b is mounted on the two support brackets 306 of the plate compressor 4b to bridge the gap between them. Similar to the second battery receptacle 204a in the second embodiment, the second battery receptacle 204b is configured to allow the battery device BD to be removably attached to it.

[0084] The battery device BD is attached to the second battery receptacle 204b such that the latch 262 (see Fig. 12) points backwards and upwards. Thus, the latch 262 is positioned for the user standing behind the plate compactor 4b to easily operate the latch 262. Therefore, the user standing behind the plate compactor 4b can easily attach and remove the battery device BD.

[0085] The adapters 82 are attached to the first battery holder 54 by sliding them to the left, towards the first battery holder 54. The adapters 82 are removed from the first battery holder 54 by sliding them to the right, away from the first battery holder 54. In this embodiment, the first battery holder 54 is located in a position that is easily accessible to the user (on the upper surface of the plate compactor 4b). Thus, the user can easily attach and remove the adapters 82. Fifth embodiment

[0086] As in Fig. As shown in Figure 18, a working machine according to this embodiment comprises a trowel (smoothing trowel) 4c and a motor unit 2. The motor unit 2 is similar to the one described in the first embodiment.

[0087] The trowel 4c has a body 320 and a handle 322 attached to the body 320. The handle 322 has a grip 324, which is held during use of the working machine, and a support 326 extending between the grip 324 and the body 320. The body 320 has a mounting base 328, to which the motor unit 2 is attached, and a plurality of blades 330, which are driven by the motor unit 2. A plurality of through holes are positioned such that they align with the plurality of screw holes 68 (see Fig. 6), is defined in the mounting base 328. By inserting screws into the plurality of through holes and tightening the screws in the plurality of screw holes 68, the motor unit 2 is attached to the paddle 4c with the lower contact surface 66 (see Fig. 6) mounted in contact with the upper surface of the mounting base 328. If the electric motor 70 (see Fig. 7) When the motor unit 2 is operated, the majority of the blades 330 rotate. The trowel 4c has rotating surfaces of the majority of blades 330 that contact the concrete surface to smooth the concrete surface. Fig. Figure 20 schematically shows a power transmission sequence in the working machine according to the embodiment described above.

[0088] In this embodiment, a front-back direction, an up-down direction, and a right-left direction of the paddle 4c are defined based on a working position (working orientation) of the paddle 4c. Specifically, a direction that is along the axis of rotation of the plurality of blades 330 and extends from the motor unit 2 in the direction of the plurality of blades 330 is defined as the downward direction (bottom direction); the opposite direction to the downward direction is defined as the upward direction (top direction); a direction that is perpendicular to the up-down direction and extends from the handle part 324 in the direction of the body 320 is defined as the forward direction (front direction); the opposite direction to the forward direction is defined as the backward direction (backward direction); and a direction perpendicular to the front-back direction and the up-down direction is defined as the right-left direction.

[0089] In this embodiment, the motor unit 2 has a second battery receptacle 90c corresponding to the paddle 4c instead of the second battery receptacle 90a (see Fig. 5) as described in the first embodiment. The second battery receptacle 90c is mounted on the support bracket 326 of the trowel 4c. The support bracket 326 extends rearward and upward from the body 320 and is connected to the handle part 324. Similar to the second battery receptacle 90a in the first embodiment, the second battery receptacle 90c is configured to allow two battery packs BP to be removably attached to it. Each battery pack BP is attached to the second battery receptacle 90c by sliding it forward and downward toward the second battery receptacle 90c. The battery pack BP is removed from the second battery receptacle 90c by sliding it backward and upward away from the second battery receptacle 90c.Thus, when the battery pack BP is attached to or removed from the second battery receptacle 90c, the user standing behind the trowel 4c can handle the battery pack BP close to their body. Therefore, the user standing behind the trowel 4c can easily attach and remove the battery pack BP. In this embodiment, the two cables 88 extending from the second battery receptacle 90c are connected to the support bracket 326 of the trowel 4c at their intermediate sections 88m. This prevents the cables 88 from being in the way during use.

[0090] The adapters 82 are attached to the first battery receptacle 54 by sliding them to the left, towards the first battery receptacle 54. The adapters 82 are removed from the first battery receptacle 54 by sliding them to the right, away from the first battery receptacle 54. In this embodiment, the first battery receptacle 54 is located in a position that is easily accessible to the user (on the upper surface of the paddle 4c). Thus, the user can easily attach and remove the adapters. Sixth embodiment

[0091] As in Fig. As shown in Figure 19, a working machine according to this embodiment comprises a paddle 4c and a motor unit 202. This paddle 4c is similar to the one described in the fifth embodiment, and the motor unit 202 is similar to the one described in the second embodiment.

[0092] In this embodiment, the motor unit 202 has a second battery receptacle 204c corresponding to the paddle 4c instead of the second battery receptacle 204a (see Fig. 13) which is described in connection with the second embodiment. The second battery receptacle 204c is mounted on the support bracket 326 of the paddle 4c. Similar to the second battery receptacle 204a in the second embodiment, the second battery receptacle 204c is configured to allow the battery device BD to be removably mounted on it.

[0093] The battery device BD is attached to the second battery receptacle 204c in such a way that the latch 262 (see Fig. 12) points backwards and upwards. Thus, the latch 262 is positioned for the user standing behind the trowel 4c to easily operate the latch 262. Therefore, the user standing behind the trowel 4c can easily attach and remove the battery device BD.

[0094] The adapters 82 are attached to the first battery holder 54 by sliding them to the left, towards the first battery holder 54. The adapters 82 are removed from the first battery holder 54 by sliding them to the right, away from the first battery holder 54. In this embodiment, the first battery holder 54 is located in a position that is easily accessible to the user (on the upper surface of the paddle 4c). Thus, the user can easily attach and remove the adapters 82. Seventh embodiment

[0095] As in Fig. Figure 21 shows that a working machine according to this embodiment comprises a concrete mixer 4d and a motor unit 2. The motor unit 2 is similar to the one described in the first embodiment.

[0096] The concrete mixer 4d has a body 340 and a handle 342 attached to the body 340. The handle 342 has a grip 344, which is gripped by the user during use, and two support brackets 386 extending between the grip 344 and the body 340. The body 340 has a mounting base 348, to which the motor unit 2 is attached, a rotating drum 350, which is driven by the motor unit 2, and a support 354 having wheels 352. The mounting base 348 is similar to the mounting base 12 described in the first embodiment. Thus, the front mounting area 56 (see Fig. 6) the motor unit 2 is attached to the mounting base 348. If the electric motor 70 (see Fig. 7) When the motor unit 2 is operated, the rotary drum 350 rotates. The rotary drum 350 receives concrete. The concrete mixer 4d rotates the rotary drum 350 to mix the concrete. Fig. Figure 23 schematically shows a power transmission sequence in the working machine according to the embodiment described above. The user can move the concrete mixer 4d by grasping the handle 344 and pushing the concrete mixer 4d by means of the support 354 (i.e., the wheels 352) which is placed on the ground.

[0097] In this embodiment, a front-back direction, an up-down direction, and a right-left direction of the concrete mixer 4d are defined based on a working position of the concrete mixer 4d. Specifically, a vertical up-down direction when the support 354 (i.e., the wheels 352) is placed on a horizontal surface is defined as the up-down direction of the concrete mixer 4d; a direction perpendicular to the up-down direction and extending from the handle 344 toward the body 340 is defined as a front direction (direction forward); the opposite direction to the front direction is defined as a rear direction (rear direction); and a direction perpendicular to the front-back direction and the up-down direction is defined as a right-left direction.

[0098] In this embodiment, the motor unit 2 has a second battery receptacle 90d corresponding to the concrete mixer 4d instead of the second battery receptacle 90a (see Fig. 5) as described in the first embodiment. The second battery receptacle 90d is mounted to the two support legs 346 of the concrete mixer 4d to bridge the gap between them. The two support legs 346 extend rearward and upward from the body 340, bend and extend rearward, and then connect to the handle 344. The second battery receptacle 90d is mounted to the rearward-extending portions of the two support legs 346 (i.e., portions closer to the handle 344 than to the bends). Similar to the second battery receptacle 90a in the first embodiment, the second battery receptacle 90d is configured to allow battery packs BP to be detachably attached to it. Each battery pack BP is attached to the second battery receptacle 90d by sliding it forward toward the second battery receptacle 90d.The BP battery pack is removed from the second battery holder 90d by sliding it backwards away from the holder. This allows the user standing behind the concrete mixer 4d to easily handle the BP battery pack close to their body when attaching or removing it from the second battery holder 90d.

[0099] The adapters 82 are attached to the first battery holder 54 by sliding them forward towards the first battery holder 54. The adapters 82 are removed from the first battery holder 54 by sliding them backward away from the first battery holder 54. Eighth embodiment

[0100] As in Fig. Figure 22 shows that a working machine according to this embodiment comprises a concrete mixer 4d and a motor unit 202. The concrete mixer 4d is similar to the one described in the seventh embodiment, and the motor unit 202 is similar to the one described in the second embodiment.

[0101] In this embodiment, the motor unit 202 has a second battery receptacle 204d corresponding to the concrete mixer 4d instead of the second battery receptacle 204a (see Fig. 13), which is described in the second embodiment. The second battery receptacle 204d is mounted on the rearward-extending portions of the two support brackets 346 (i.e., the portions closer to the handle 344 than to the bends) to bridge the gap between the two support brackets 346. Similar to the second battery receptacle 204a in the second embodiment, the second battery receptacle 204d is configured to allow the battery device BD to be removably attached to it.

[0102] The battery device BD is attached to the second battery receptacle 204d, so that the latch 262 (see Fig. 12) points to the rear. Thus, the latch 262 is positioned so that the user standing behind the concrete mixer 4d can easily operate the latch 262. Therefore, the user standing behind the concrete mixer 4d can easily attach and remove the battery device BD.

[0103] The adapters 82 are attached to the first battery holder 54 by sliding them forward towards the first battery holder 54. The adapters 82 are removed from the first battery holder 54 by sliding them backward away from the first battery holder 54. Ninth embodiment

[0104] As in Fig. Figure 24 shows that a working machine according to this embodiment comprises a concrete saw 4e and a motor unit 2. The motor unit 2 is similar to the one described in the first embodiment.

[0105] The concrete saw 4e has a body 360 and a handle 362 attached to the body 360. The handle 362 has a grip 364, which is held by the user during use, and a support 366 extending between the grip 364 and the body 360. The body 360 has a mounting base 368, to which the motor unit 2 is attached, a rotary cutting edge (cutting disc) 370, which is driven by the motor unit 2, and a carrier 374, which has wheels 372. The mounting base 368 is similar to the mounting base 328 (see Fig. 18), which is described in the fifth embodiment. Thus, the lower mounting area 64 (see Fig. 6) the motor unit 2 is attached to the mounting base 368. If the electric motor 70 (see Fig. 7) When the motor unit 2 is operated, the rotary cutting edge 370 rotates. The concrete saw 4e makes cuts (so-called mortar joints) in the concrete laid on the floor with the rotary cutting edge. Fig. Figure 26 schematically shows a power transmission sequence in the working machine according to the embodiment described above. The user can move the concrete saw 4e by grasping the handle 364 and pushing the concrete saw 4e by means of the carrier 374 (i.e. the wheels 372) which is placed on the ground.

[0106] In this embodiment, a front-back direction, an up-down direction, and a right-left direction of the concrete saw 4e are defined based on a working position of the concrete saw 4e. Specifically, a vertical up-down direction when the support 374 (i.e., the wheels 372) is placed on a horizontal surface is defined as the up-down direction of the concrete saw 4e; a direction perpendicular to the up-down direction and extending from the handle 364 towards the body 360 is defined as the front direction (direction forward); the opposite direction to the front direction is defined as a rear direction (definitely reverse direction); and a direction perpendicular to the front-back direction and the up-down direction is defined as a right-left direction.

[0107] In this embodiment, the motor unit 2 has a second battery receptacle 90e corresponding to the concrete saw 4e instead of the second battery receptacle 90a (see Fig. 5) as described in the first embodiment. The second battery receptacle 90e is mounted on the support bracket 366 of the concrete saw 4e. The support bracket 366 extends rearward and upward from the body 360 and connects to the handle 364. Similar to the second battery receptacle 90a in the first embodiment, the second battery receptacle 90e is configured to allow two battery packs BP to be removably mounted on it. Each battery pack BP is attached to the second battery receptacle 90e by sliding it forward and downward toward the second battery receptacle 90e. The battery pack BP is removed from the second battery receptacle 90e by sliding it backward and upward away from the second battery receptacle 90e.Therefore, when the BP battery pack is attached to or removed from the second battery holder 90e, the user standing behind the 4e concrete saw can handle the BP battery pack close to their body. This allows the user standing behind the 4e concrete saw to easily attach and remove the BP battery pack.

[0108] The adapters 82 are attached to the first battery holder 54 by sliding them to the right, towards the first battery holder 54. The adapters 82 are removed from the first battery holder 54 by sliding them to the left, away from the first battery holder 54. In this embodiment, the first battery holder 54 is located in a position that is easily accessible to the user (on the upper surface of the concrete saw 4e). Thus, the user can easily attach and remove the adapters 82. Tenth embodiment

[0109] As in Fig. As shown in Figure 25, a working machine according to this embodiment comprises a concrete saw 4e and a motor unit 202. The concrete saw 4e is similar to the one described in the ninth embodiment, and the motor unit 202 is similar to the one described in the second embodiment.

[0110] In this embodiment, the motor unit 202 has a second battery receptacle 204e corresponding to the concrete saw 4e instead of the second battery receptacle 204a (see Fig. 13) as described in the second embodiment. The second battery holder 204e is mounted on the support 366 of the concrete saw 4e. Similar to the second battery holder 204a in the second embodiment, the second battery holder 204e is configured to allow the battery device BD to be removably attached to it.

[0111] The battery device BD is attached to the second battery receptacle 204e in such a way that the latch 262 (see Fig. 12) points backwards and upwards. Thus, the latch 262 is positioned so that the user standing behind the concrete saw 4e can easily operate the latch 262. Therefore, the user standing behind the concrete saw 4e can easily attach and remove the battery device BD.

[0112] The adapters 82 are attached to the first battery holder 54 by sliding them to the right, towards the first battery holder 54. The adapters 82 are removed from the first battery holder 54 by sliding them to the left. In this embodiment, the first battery holder 54 is located in a position that is easily accessible to the user (on the upper surface of the concrete saw 4e). Thus, the user can easily attach and remove the adapters 82. Eleventh embodiment

[0113] As in Fig. As shown in Figure 27, the machine according to this embodiment comprises a high-pressure cleaner 4f and a motor unit 2. This motor unit 2 is similar to the one described in the first embodiment.

[0114] The high-pressure cleaner 4f has a body 380 and a handle 382 attached to the body 380. The handle 382 has a grip 384, which is held by the user during use, and two support brackets 386 extending between the grip 384 and the body 380. The body 380 has a pump 388, which is driven by the motor unit 2, and a support 392, which has wheels 390. The pump 388 has a mounting base 394, to which the motor unit 2 is attached. The mounting base 384 is similar to the mounting base 12 described in the first embodiment. Thus, the front mounting area 56 (see Fig. 6) of the motor unit 2 is attached to the mounting base 394. Furthermore, a water supply hose (not shown), which connects to a water source (e.g., water pipe), and a water discharge hose (not shown), which has a spray nozzle at one end, are connected to the pump 388. When the electric motor 70 (see Fig. 7) When the motor unit 2 is operated, pump 388 is used to pump water supplied through the water supply hose to the water discharge hose. The water is then expelled from the spray nozzle. The high-pressure cleaner 4f cleans a target (e.g., a car) with the water expelled from the spray nozzle. Fig. Figure 29 schematically shows a power transmission sequence in the working machine according to the embodiment described above. The user can move the high-pressure cleaner 4f by grasping the handle 384 and pushing the high-pressure cleaner 4f with the support 392 (i.e., the wheels 93) placed on the ground.

[0115] In this embodiment, a front-back direction, an up-down direction, and a right-left direction of the high-pressure cleaner 4f are defined based on a working position of the high-pressure cleaner 4f. Specifically, a vertical up-down direction when the support 392 (i.e., the wheels 390) is located on a horizontal surface is defined as the up-down direction of the high-pressure cleaner 4f; a direction perpendicular to the up-down direction and extending from the handle 384 toward the body 380 is defined as the forward direction; the opposite direction to the forward direction is defined as the rear direction; and a direction perpendicular to both the front-back and up-down directions is defined as the right-left direction.

[0116] In this embodiment, the motor unit 2 has a second battery holder 90f corresponding to the high-pressure cleaner 4f instead of the second battery holder 90a (see Fig. 5), as described in the first embodiment. The second battery holder 90f is mounted to the two support brackets 386 of the high-pressure cleaner 4f to bridge the gap between them. The two support brackets 386 extend rearward and upward from the body 380 and connect to the handle 384. Similar to the second battery holder 90a in the first embodiment, the second battery holder 90f is configured to allow two battery packs BP to be removable from it. Each battery pack BP is attached to the second battery holder 90f by sliding it forward and downward toward the second battery holder 90f. The battery pack BP is removed from the second battery holder 90f by sliding it backward and upward away from the second battery holder 90f.Therefore, when attaching or removing the BP battery pack from the second battery holder 90f, the user standing behind the 4f pressure washer can handle the BP battery pack close to their body. This allows the user standing behind the 4f pressure washer to easily attach and remove the BP battery pack.

[0117] The adapters 82 are attached to the first battery holder 54 by sliding them forward toward the first battery holder 54. The adapters 82 are removed from the first battery holder 54 by sliding them backward away from the first battery holder 54. In this embodiment, the first battery holder 54 is located in a position that is easily accessible to the user (on the upper surface of the pressure washer 4f). Thus, the user can easily attach and remove the adapters 82. Twelfth embodiment

[0118] As in Fig. Figure 28 shows that a machine according to this embodiment comprises a high-pressure cleaner 4f and a motor unit 202. The high-pressure cleaner 4f is similar to the one described in the eleventh embodiment, and the motor unit 202 is similar to the one described in the second embodiment.

[0119] In this embodiment, the motor unit 202 has a second battery receptacle 204f corresponding to the high-pressure cleaner 4f instead of the second battery receptacle 204a (see Fig. 13) as described in the second embodiment. The second battery receptacle 204f is mounted to the two support brackets 386 to bridge them. Similar to the second battery receptacle 204a in the second embodiment, the second battery receptacle 204f is configured to allow the battery device BD to be removably attached to it.

[0120] The battery device BD is attached to the second battery receptacle 204f such that the latch 262 (see Fig. 12) points backwards and upwards. Thus, the latch 262 is positioned so that the user standing behind the pressure washer 4f can easily operate the latch 262. This allows the user standing behind the pressure washer 4f to easily attach and remove the battery device BD.

[0121] The adapters 82 are attached to the first battery holder 54 by sliding them forward toward the first battery holder 54. The adapters 82 are removed from the first battery holder 54 by sliding them backward away from the first battery holder 54. In this embodiment, the first battery holder 54 is located in a position that is easily accessible to the user (on the upper surface of the pressure washer 4f). Thus, the user can easily attach and remove the adapters 82. Thirteenth embodiment

[0122] As in Fig. Figure 30 shows that a working machine according to this embodiment has a spraying device 4g and a motor unit 2. The motor unit 2 is similar to the one described in the first embodiment.

[0123] The spray device 4g comprises a pump 400, a drum 404 on which a hose 402 is wound, and a frame 406 that supports the pump 400 and the drum 404. The pump 400 has a mounting base 408 to which the motor unit 2 is attached. The mounting base 408 is similar to the mounting base 12 described in the first embodiment. Thus, the front mounting area 56 (see Fig. 6) the motor unit 2 is attached to the mounting base 408. A tank containing a liquid (not shown) and the hose 402 are connected to the pump 400. A spray nozzle (not shown) is located at one end of the hose 402. When the electric motor 70 (see Fig. 7) When the motor unit 2 is operated, the pump 400 is driven to pump the liquid in the tank to the hose 402. The liquid is then expelled from the spray nozzle. The spray device 4g sprays the liquid (e.g., agricultural chemicals) in the tank. Fig. Figure 32 schematically shows a power transmission sequence in the working machine according to the embodiment described above.

[0124] In this embodiment, a front-back direction, an up-down direction, and a left-right direction of the spray device 4g are defined based on a working position of the spray device 4g. Specifically, a vertical up-down direction when the frame 406 is located on a horizontal surface is defined as the up-down direction of the spray device 4g; a direction perpendicular to the up-down direction and extending from the pump 400 towards the coil 404 is defined as the forward direction; the opposite direction to the forward direction is defined as the rear direction; and a direction perpendicular to both the front-back and up-down directions is defined as the left-right direction.

[0125] In this embodiment, the motor unit 2 has a second battery holder 90g corresponding to the spray device 4g instead of the second battery holder 90a (see Fig. 5), as described in the first embodiment. The second battery receptacle 90g is mounted at the upper ends of the frame 406. Similar to the second battery receptacle 90a in the first embodiment, the second battery receptacle 90g is configured to allow two battery packs BP to be detachably attached to it. Each battery pack BP is attached to the second battery receptacle 90g by sliding it rearward toward the second battery receptacle 90g. The battery pack BP is removed from the second battery receptacle 90g by sliding it forward away from the second battery receptacle 90g. In this embodiment, the second battery receptacle 90g is positioned in a location easily accessible to the user (on the upper surface of the spray device 4g). Thus, the user can easily attach and remove the battery pack BP.

[0126] The adapters 82 are attached to the first battery holder 54 by sliding them forward toward the first battery holder 54. The adapters 82 are removed from the first battery holder 54 by sliding them backward away from the first battery holder 54. In this embodiment, the first battery holder 54 is located in a position that is easily accessible to the user (on the upper surface of the spray device 4g). Thus, the user can easily attach and remove the adapters 82. Fourteenth embodiment

[0127] As in Fig. As shown in Figure 31, a machine according to this embodiment comprises a spraying device 4g and a motor unit 202. The spraying device 4g is similar to that described in the thirteenth embodiment, and the motor unit 202 is similar to that described in the second embodiment.

[0128] In this embodiment, the motor unit 202 has a second battery receptacle 204g corresponding to the spray device 4g instead of the second battery receptacle 204a (see Fig. 13) as described in the second embodiment. The second battery receptacle 204g is mounted to the upper ends of the frame 406. Similar to the second battery receptacle 204a in the second embodiment, the second battery receptacle 204g is configured to allow the battery device BD to be removably attached to it. In this embodiment, the second battery receptacle 204g is located in a position that is easily accessible to the user (on the upper surface of the spray device 4g). The user can easily attach and remove the battery device BD.

[0129] The adapters 82 are attached to the first battery holder 54 by sliding them forward toward the first battery holder 54. The adapters 82 are removed from the first battery holder 54 by sliding them backward away from the first battery holder 54. In this embodiment, the first battery holder 54 is located in a position that is easily accessible to the user (on the upper surface of the spray device 4g). Thus, the user can easily attach and remove the adapters 82. Fifteenth embodiment

[0130] As in Fig. Figure 33 shows that a working machine according to this embodiment comprises a mowing machine 4h and a motor unit 2. The motor unit 2 is similar to the one described in the first embodiment.

[0131] The mowing machine 4h has a body 420 and a handle 422 attached to the body 420. The handle 422 has a grip 424, which is held by the user during use, and two support brackets 426 extending between the grip 424 and the body 420. The body 420 has a mounting base 428, to which the motor unit 2 is attached, a spindle blade 430, which is driven by the motor unit 2, and a housing 434 with wheels 432. The mounting base 428 is similar to the mounting base 328 (see Fig. 18), which is described in the fifth embodiment. Thus, the lower mounting area 64 (see Fig. 6) the motor unit 2 is attached to the mounting base 428. If the electric motor 70 (see Fig. 7) When the motor unit 2 is operated, the spindle blade 430 rotates. The mower 4h holds the lawn between the rotating spindle blade 430 and a fixed blade (not shown) which is fixed to the housing 434, for cutting the lawn. Fig. Figure 35 schematically shows a power transmission sequence in the working machine according to the embodiment described above. The user can move the mower 4h by grasping the handle 424 and pushing the mower 4h with the housing 434 (i.e., the wheels 432) placed on the ground.

[0132] In this embodiment, a front-back direction, an up-down direction, and a right-left direction of the mower 4h are defined based on a working position of the mower 4h. Specifically, a vertical up-down direction when the housing 434 (i.e., the wheels 432) is placed on a horizontal surface is defined as the up-down direction of the mower 4h; a direction perpendicular to the up-down direction and extending from the handle 424 toward the body 420 is defined as the front direction (direction forward); the opposite direction to the forward direction is defined as the rear direction (direction backward); and a direction perpendicular to both the front-back and up-down directions is defined as the right-left direction.

[0133] In this embodiment, the motor unit 2 has a second battery compartment 90h corresponding to the mower 4h instead of the second battery compartment 90a (see Fig. 5) as described in the first embodiment. The second battery holder 90h is mounted to the two support brackets 426 of the mower 4h to bridge the gap between them. The two support brackets 426 extend rearward and upward from the body 420 and connect to the handle 424. Similar to the second battery holder 90a in the first embodiment, the second battery holder 90h is configured to allow two battery packs BP to be removable from it. Each battery pack BP is attached to the second battery holder 90h by sliding it forward and downward toward the second battery holder 90h. The battery pack BP is removed from the second battery holder 90h by sliding it backward and upward away from the second battery holder 90h.Therefore, when the BP battery pack is attached to or removed from the second battery holder (90h), the user standing behind the mower (4h) can handle the BP battery pack close to their body. This allows the user standing behind the mower (4h) to easily attach and remove the BP battery pack.

[0134] The adapters 82 are attached to the first battery holder 54 by sliding them to the left, towards the first battery holder 54. The adapters 82 are removed from the first battery holder 54 by sliding them to the right. In this embodiment, the first battery holder 54 is located in a position that is easily accessible to the user (on the upper surface of the mower 4h). Thus, the user can easily attach and remove the adapters 82. Sixteenth embodiment

[0135] As in Fig. Figure 34 shows that a working machine according to this embodiment comprises a mowing machine 4h and a motor unit 202. The mowing machine 4h is similar to the one described in the fifteenth embodiment, and the motor unit 202 is similar to the one described in the second embodiment.

[0136] In this embodiment, the motor unit 202 has a second battery compartment 204h corresponding to the mower 4h instead of the second battery compartment 204a (see Fig. 13) as described in the second embodiment. The second battery receptacle 204h is mounted to the two support brackets 426 to bridge the gap between them. Similar to the second battery receptacle 204a in the second embodiment, the second battery receptacle 204h is configured to allow the second battery device BD to be removably mounted to it.

[0137] The battery device BD is attached to the second battery receptacle 204h in such a way that the latch 262 (see Fig. 12) points in a direction backwards and upwards. Thus, the latch 262 is positioned for the user standing behind the mower 4h to easily operate the latch 262. Therefore, the user standing behind the mower 4h can easily attach and remove the battery device BD.

[0138] The adapters 82 are attached to the first battery holder 54 by sliding them to the left, towards the first battery holder 54. The adapters 82 are removed from the first battery holder 54 by sliding them to the right. In this embodiment, the first battery holder 54 is located in a position that is easily accessible to the user (on the upper surface of the mower 4h). Thus, the user can easily attach and remove the adapters 82. Seventeenth embodiment

[0139] As in Fig. Figure 36 shows that a working machine according to this embodiment comprises a compaction roller 4i and a motor unit 2. The motor unit 2 is similar to the one described in the first embodiment.

[0140] The compactor roller 4i has a body 440 and a handle 442 attached to the body 440. The handle 442 has a grip 444, which the user grips during use, and a support 446 (see Fig. 37) extending between the handle 444 and the body 440. The body 440 has a mounting base 448 to which the motor unit 2 is attached, and rollers 450 driven by the motor unit 2. The mounting base 448 is similar to the mounting base 12 described in the first embodiment. Thus, the front mounting area 56 (see Fig. 6) the motor unit 2 is attached to the mounting base 448. If the electric motor 70 (see Fig. 7) When the motor unit 2 is operated, the rollers 450 rotate and a vibration excitation mechanism (e.g., eccentric weights) housed within the rollers 450 is activated. The compaction roller 4i moves on the ground while the vibrating rollers 450 press against the ground. The compaction roller 4i compacts the ground in this way. Fig. Figure 38 schematically shows a power transmission sequence in the working machine according to the embodiment described above.

[0141] In this embodiment, a front-back direction, an up-down direction, and a left-right direction of the compressor roller 4i are defined based on a working position of the compressor roller 4i. Specifically, a vertical up-down direction when the rollers 450 are located on a horizontal surface is defined as the up-down direction of the compressor roller 4i; a direction perpendicular to the up-down direction and extending from the handle 444 towards the body 440 is defined as the front direction (direction forward); the opposite direction to the front direction is defined as the rear direction (direction backward); and a direction perpendicular to the front-back direction and the up-down direction is defined as the left-right direction.

[0142] In this embodiment, the motor unit 2 has a second battery receptacle 90i corresponding to the compressor roller 4i instead of the second battery receptacle 90a (see Fig. 5), as described in the first embodiment. The second battery receptacle 90i is mounted on the bearing support 446 of the compactor roller 4i. The bearing support 446 extends rearward and upward from the body 440 and connects to the handle 444. Similar to the second battery receptacle 90a in the first embodiment, the second battery receptacle 90i is configured to allow two battery packs BP to be removably mounted on it. Each battery pack BP is attached to the second battery receptacle 90i by sliding it forward and downward toward the second battery receptacle 90i. The battery pack BP is removed from the second battery receptacle 90i by sliding it rearward and upward away from the second battery receptacle 90i.Therefore, when the BP battery pack is attached to or removed from the second battery holder 90i, the user standing behind the compressor roller 4i can handle the BP battery pack close to their body. This allows the user standing behind the compressor roller 4i to easily attach and remove the BP battery pack.

[0143] The adapters 82 are attached to the first battery holder 54 by sliding them to the right, towards the first battery holder 54. The adapters 82 are removed from the first battery holder 54 by sliding them to the left, away from the first battery holder 54. In this embodiment, the first battery holder 54 is located in a position that is easily accessible to the user (on the upper surface of the compactor roller 4i). Thus, the user can easily attach and remove the adapters 82. Eighteenth embodiment

[0144] As in Fig. Figure 37 shows that a working machine according to this embodiment comprises a compressor roller 4i and a motor unit 202. This compressor roller 4i is similar to the one described in the seventeenth embodiment, and the motor unit 202 is similar to the one described in the second embodiment.

[0145] In this embodiment, the motor unit 202 has a second battery receptacle 204i corresponding to the compressor roller 4i instead of the second battery receptacle 204a (see Fig. 13) as described in the second embodiment. The second battery receptacle 204i is mounted on the upper surface of the body 440. Similar to the second battery receptacle 204a in the second embodiment, the second battery receptacle 204i is configured to allow the battery device BD to be removably mounted to it. The battery device BD is attached to the second battery receptacle 204i such that the latch 262 points forward. In this embodiment, the second battery receptacle 204i is located in a position that is easily accessible to the user (on the upper surface of the compressor roller 4i). Thus, the user can easily attach and remove the battery device BD.

[0146] The adapters 82 are attached to the first battery holder 54 by sliding them to the right, towards the first battery holder 54. The adapters 82 are removed from the first battery holder 54 by sliding them to the left, away from the first battery holder 54. In this embodiment, the first battery holder 54 is located in a position that is easily accessible to the user (on the upper surface of the compactor roller 4i). Thus, the user can easily attach and remove the adapters 82.

[0147] In the disclosure herein, the second battery recordings 90a, 90b, 90c, 90d, 90e, 90f, 90g, 90h, and 90i may be collectively referred to as "second battery recording 90". Furthermore, the second battery recordings 204a, 204b, 204c, 204d, 204e, 204f, 204g, 204h, and 204i may be collectively referred to as "second battery recordings 204". Variations

[0148] ( Fig. 5 and Fig. 10) The number of battery packs BP that can be attached to the first battery holder 54 can be one, three, or more. Similarly, the number of battery packs BP that can be attached to the second battery holder 90 can be one, three, or more.

[0149] ( Fig. 8) The adapters 82 can be attached to the first battery holder 54 in a non-removable manner. That is, once the adapters 82 have been attached to the first battery holder 54, their removal can be prevented.

[0150] ( Fig. 7 etc.) The motor unit 2 need not have the first battery receptacle 54 or the adapters 82. In this case, each cable 88 can connect the housing 50 to the second battery receptacle 90 instead of connecting the adapter 82 to the second battery receptacle 90. The power from the battery packs BP attached to the second battery receptacle 90 can be supplied to the electric motor 70 inside the housing 50 through the second battery receptacle 90 and the cables 88.

[0151] ( Fig. 7 etc.) The motor unit 202 need not have the first battery receptacle 54 or the adapters 82. In this case, the cables 88 can connect the housing 50 to the second battery receptacle 204 instead of connecting the adapters 82 to the second battery receptacle 204. The power from the battery device BD, which is attached to the second battery receptacle 204, can be supplied to the electric motor 70 inside the housing 50 via the second battery receptacle 204 and the cables 88.

[0152] ( Fig. 7 etc.) The control circuit board 74 can be located on the outside of the housing 50. For example, the control circuit board 74 can be located at the working unit 4. The control circuit board 74 can be integrated with the second battery holder 90 (or 204).

[0153] ( Fig. 6 etc.) The motor unit 2 (or 202) need not have one of the front contact surface 58 and the lower contact surface 66.

[0154] ( Fig. 9 etc.) The motor unit 2 does not need to have cover 96.

[0155] ( Fig. 10 etc.) The second battery compartment 90 can be divided into a first area, to which a battery pack BP is attached, and a second area, to which another battery pack BP is attached. The first and second areas can be arranged separately on the handle of the work unit 4.

[0156] ( Fig. 1, Fig. 11 etc.) The second battery receptacle 90 (or 204) can be located in a different position (e.g., on a side surface of the work unit 4) than a position on the handle of the work unit 4 and a position on the top surface of the work unit 4. Thus, the battery packs BP (or the battery device BD) can be attached in a different position (e.g., on a side surface of the work unit 4) than a position on the handle of the work unit 4 and a position on the top surface of the work unit 4.

[0157] ( Fig. 5, Fig. 10, etc.) The first battery receptacle 54 and the second battery receptacle 90 need not have components that have the same shape relative to each other.

[0158] ( Fig. 1, Fig. 11, etc.) The length of the cables 88 can be less than 100 mm or greater than 2000 mm. Features of the motor unit 2

[0159] In one or more embodiments, the motor unit 2 is configured to be detachably attached to each of the working units 4 of several types for driving the working unit 4. The motor unit 2 comprises the output shaft 52, which is configured to be connected to the working unit 4; the electric motor 70, which is configured to rotate the output shaft 52; the housing 50, which accommodates the electric motor 70; the first battery receptacle 54, which is arranged on the housing 50 and is configured to allow the battery pack BP (an example of a first battery) to be detachably attached to it; the second battery receptacle 90, which is arranged on the working unit 4 and is configured to allow the battery pack BP (an example of a second battery) to be detachably attached to it; and the adapter 82, which is configured toThe first battery holder 54 is to be connected instead of the battery pack BP. The cable 88, extending from the adapter 82 and configured to connect to the second battery holder 90, and the control circuit board 74, configured to control the output of the electric motor 70, are to be connected. When the battery pack BP is connected to the first battery holder 54, power is supplied from the battery pack BP to the electric motor 70 via the first battery holder 54. When the adapter 82 is connected to the first battery holder 54 and the battery pack BP is connected to the second battery holder 90, power is supplied from the battery pack BP to the electric motor 70 via the cable 88, the adapter 82, and the first battery holder 54.

[0160] In the configuration described above, the battery pack BP can be attached to the second battery receptacle 90, which is located on the working unit 4. Attaching the battery pack BP to the second battery receptacle 90 reduces the transmission of vibrations from the housing 50 to the battery pack BP, compared to attaching the battery pack BP directly to the housing 50.

[0161] In one or more embodiments, the motor unit 2 is configured to be removablely attached to each of the working units 4 of several types for driving the working unit 4.The motor unit 2 comprises the output shaft 52, configured to connect to the working unit 4; the electric motor 70, configured to rotate the output shaft 52; the housing 50, which accommodates the electric motor 70; the second battery receptacle 90 (an example of a battery receptacle), located on the working unit 4 and configured to allow the battery pack BP (an example of a battery) to be detachably attached to it; the cable 88, extending from the housing 50 and configured to connect to the second battery receptacle 90; and the control circuit board 74, located in the housing 50 and configured to control the output of the electric motor 70. When the battery pack BP is attached to the second battery receptacle 90, power is supplied from the battery pack BP to the electric motor 70 via the cable 88.

[0162] In the configuration described above, the battery pack BP can be attached to the second battery receptacle 90, which is located on the working unit 4. Attaching the battery pack BP to the second battery receptacle 90 reduces the transmission of vibrations from the housing 50 to the battery pack BP, compared to attaching the battery pack BP directly to the housing 50.

[0163] In one or more embodiments, the control circuit board 74 is arranged in the housing 50.

[0164] The fan 72 for cooling the electric motor 70 is located in the housing 50. In the configuration described above, both the control board 74 and the electric motor 70 can be cooled by a cooling airflow generated by the fan 72. Therefore, it is not necessary to arrange another fan 72 for cooling the control board 74 at the motor unit 2, thus simplifying the motor unit 2.

[0165] In one or more embodiments, the motor unit 2 further comprises the lower contact surface 66 (an example of a first surface) which is parallel to the axial direction of the output shaft 52, and the front contact surface 58 (an example of a second surface) which is perpendicular to the axial direction of the output shaft 52. The motor unit 2 is configured to be fixed to the working unit 4 with at least one of the lower contact surface 66 and the front contact surface 58 in contact with the working unit 4.

[0166] In the configuration described above, the motor unit 2 can be attached to the working units 4 in various orientations (positions) (e.g., with the lower contact surface 66 in contact with the working unit 4, with the front contact surface 58 in contact with the working unit 4, etc.). This results in an increase in the number of types of working units 4 to which the motor unit 2 can be attached.

[0167] In one or more embodiments, the battery pack BP is able to supply power to an electrical device (e.g., the electric tool T) that is different from that of the motor unit 2 when the battery pack BP is removed from the motor unit 2 and attached to the electrical device.

[0168] The configuration described above allows the battery pack BP to be used not only with the motor unit 2, but also with the electrical device, which is different from the motor unit 2.

[0169] In one or more embodiments, the second battery receptacle 90 can be configured to allow a plurality of battery packs BP to be removablely attached to it.

[0170] Since the majority of battery packs BP can be attached to the second battery mount 90 in the configuration described above, the electric motor 70 can be operated using the power from the majority of battery packs BP. This allows for an increase in the output of the electric motor 70, for example, compared to the electric motor 70 that operates using the power from a single battery pack BP. Thus, the motor unit 2 can be used with work units 4 that require high output. That is, the configuration described above allows for an increase in the number of types of work units 4 with which the motor unit 2 can be used.

[0171] In one or more embodiments, the motor unit 2 further comprises the cover 96, which covers the battery pack BP, which is attached to the second battery receptacle 90.

[0172] The configuration described above protects the BP battery pack, which is attached to the second battery receptacle 90, from external water and dust.

[0173] In one or more embodiments, the working units 4 have handles 10, 302, 322, 342, 362, 382, ​​422, 442, which have a grip configured to be grasped by a user. The second battery receptacle 90 is located at one of the handles 10, 302, 322, 342, 362, 382, ​​422, 442.

[0174] In the configuration described above, the second battery receptacle 90 is located on one of the handles 10, 302, 322, 342, 362, 382, ​​422, or 442. The handles 10, 302, 322, 342, 362, 382, ​​422, or 442 can be configured to reduce the transmission of vibrations from the bodies of the working units 4, thus preventing discomfort for the user gripping the handle. Therefore, attaching the battery pack BP to the second battery receptacle 90 reduces the transmission of vibrations from the body of the working unit 4 to the battery pack BP. Furthermore, in the embodiment described above, the second battery receptacle 90 is located in a position that is easily accessible to the user. This allows the user to easily attach and remove the battery pack BP from the second battery receptacle 90.

[0175] In one or more embodiments, the second battery receptacle 90 is located on the upper surface of the working unit 4 when the working unit 4 is in its working position.

[0176] In the configuration described above, the second battery holder 90 is in a position that is easily accessible to the user when the work unit 4 is in its working position. This allows the user to easily attach the battery pack BP to and remove the battery pack BP from the second battery holder 90.

[0177] In one or more embodiments, the first battery receptacle 54 and the second battery receptacle 90 each have the connecting terminals 46 (an example of a common component), and the connecting terminals 46 have a common shape relative to each other.

[0178] The configuration described above allows for the use of common components in the first and second battery mounts 94, 90. This enables a reduction in the manufacturing costs of the motor unit 2.

[0179] In one or more embodiments, the length of cable 88 is in a range from 100 mm to 2000 mm.

[0180] The cable 88 extends between the first battery holder 54, located on the housing 50, and the second battery holder 90, located on the working unit 4. If the length of the cable 88 were too long relative to the distance between the first and second battery holders 54, 90, the cable 88 could sag excessively and obstruct operation. Although the distance between the first and second battery holders 54, 90 varies depending on the working unit 4, it is generally expected to be in the range of 50 mm to 1500 mm. In the configuration described above, the length of the cable 88 is slightly longer than the expected distance between the first and second battery holders 54, 90. Thus, the configuration described above prevents the cable 88 from sagging excessively and therefore from obstructing operation.

[0181] In one or more embodiments, the adapter 82 is configured to be removablely attached to the first battery receptacle 54.

[0182] If the adapter 82 were configured to be permanently attached to the first battery receptacle 54, it could not be removed once attached. However, the user might wish to remove the adapter 82 from the first battery receptacle 54 after attaching it. For example, the user might wish to do so if they wanted to attach the battery pack BP to the first battery receptacle 54 instead of the adapter 82. In the configuration described above, the adapter 82 is permanently attached to the first battery receptacle 54. Thus, the adapter 82 can be removed from the first battery receptacle 54 after it has been attached. Therefore, the battery pack BP can be attached to the first battery receptacle 54 instead of the adapter 82.

[0183] In one or more embodiments, the working unit 4 functions as the rammer 4a, configured to tamp the ground. The working unit 4 has the handle 10, which has grips 20, 22, 24 configured to be gripped by a user. The second battery receptacle 90 is located on the handle 10.

[0184] In the configuration described above, the battery pack BP is attached to the handle 10 of the rammer 4a. This reduces the transmission of vibrations from the housing 50 to the battery pack BP and also reduces the transmission of vibrations from the working part 6 of the rammer 4a (an example of a body of the rammer) to the battery pack BP.

[0185] In one or more embodiments, the working unit 4 functions as the plate compactor 4b, configured to compact the soil. The working unit 4 has the handle 302, which has the grip 304 configured to be gripped by a user. The second battery receptacle 90 is located on the handle 302.

[0186] In the configuration described above, the battery pack BP is attached to the handle 302 of the plate compactor 4b. This reduces the transmission of vibrations from the housing 50 to the battery pack BP and also reduces the transmission of vibrations from the body 300 of the plate compactor 4b to the battery pack BP.

[0187] In one or more embodiments, the working unit 4 functions as the trowel 4c, which is configured to smooth (level) a concrete surface. The working unit 4 has the handle 322, which has the grip 324 configured to be gripped by a user. The second battery receptacle 90 is located on the handle 322.

[0188] In the configuration described above, the battery pack BP is located on the handle 322 of the trowel 4c. This reduces the transmission of vibrations from the housing 50 to the battery pack BP and also reduces the transmission of vibrations from the body 320 of the trowel 4c to the battery pack BP.

[0189] In one or more embodiments, the working unit 4 functions as the concrete mixer 4d, configured to mix concrete. The working unit 4 has the handle 342, which has the grip 344 configured to be gripped by a user. The second battery receptacle 90 is located on the handle 342.

[0190] In the configuration described above, the battery pack BP is attached to the handle 342 of the concrete mixer 4d. This reduces the transmission of vibrations from the housing 50 to the battery pack BP and also reduces the transmission of vibrations from the body 340 of the concrete mixer 4d to the battery pack BP.

[0191] In one or more embodiments, the working unit 4 functions as the concrete saw 4e, which is configured to make a cut in the concrete. The working unit 4 has the handle 362, which has the grip 364 configured to be gripped by a user. The second battery receptacle 90 is located on the handle 362.

[0192] In the configuration described above, the battery pack BP is attached to the handle 362 of the concrete saw 4e. This reduces the transmission of vibrations from the housing 50 to the battery pack BP and also reduces the transmission of vibrations from the body 360 of the concrete saw 4e to the battery pack BP.

[0193] In one or more embodiments, the working unit 4 functions as the high-pressure cleaner 4f (or as the spray device 4g) (an example of a spraying device) configured to increase the pressure of a liquid and spray the liquid. The second battery receptacle 90 is attached to the upper surface of the working unit 4 when the working unit 4 is in its working position.

[0194] In the configuration described above, the battery pack BP is attached to the upper surface of the high-pressure cleaner 4f (or spray device 4g). This reduces the transmission of vibrations from the housing 50 to the battery pack BP.

[0195] In one or more embodiments, the working unit 4 functions as the mowing machine 4h. The working unit 4 has the handle 422, which has the grip 424 configured to be gripped by a user. The second battery receptacle 90 is located on the handle 422.

[0196] In the configuration described above, the battery pack BP is attached to the handle 422 of the mower 4h. This reduces the transmission of vibrations from the housing 50 to the battery pack BP and also reduces the transmission of vibrations from the body 420 of the mower 4h to the battery pack BP.

[0197] In one or more embodiments, a working machine has a working unit 4 and a motor unit 2, which is configured to be removablely attached to the working unit 4 for driving the working unit 4 with power from the motor unit 2.

[0198] The configuration described above provides the working machine, which reduces the transmission of vibrations from the housing 50 to the battery pack BP. Features of motor unit 202

[0199] In one or more embodiments, the motor unit 202 is configured to be detachably attached to any of the working units 4 of several types for driving the working unit 4. The motor unit 202 comprises the output shaft 52, which is configured to be connected to the working unit 4; the electric motor 70, which is configured to rotate the output shaft 52; the housing 50, which accommodates the electric motor 70; the first battery receptacle 54, which is arranged on the housing 50 and is configured to allow the battery pack BP (an example of a first battery) to be detachably attached to it; the second battery receptacle 204, which is arranged on the working unit 4 and is configured to allow the battery device BD (an example of a second battery) to be detachably attached to it; and the adapter 82, which is configured toThe first battery holder 54 is to be connected instead of the battery pack BP. The cable 88, extending from the adapter 82 and configured to connect to the second battery holder 204, and the control circuit board 74, configured to control the output of the electric motor 70, are also connected. When the battery pack BP is connected to the first battery holder 54, power is supplied from the battery pack BP to the electric motor 70 via the first battery holder 54. When the adapter 82 is connected to the first battery holder 54 and the battery device BD is connected to the second battery holder 204, power is supplied from the battery device BD to the electric motor 70 via the cable 88, the adapter 82, and the first battery holder 54.

[0200] In the configuration described above, the battery device BD can be attached to the second battery receptacle 204, which is located on the working unit 4. Attaching the battery device BD to the second battery receptacle 204 reduces the transmission of vibrations from the housing 50 to the battery device BD, compared to attaching the battery device BD directly to the housing 50.

[0201] In one or more embodiments, the motor unit 202 is configured to be removablely attached to each of the working units 4 of several types for driving the working unit 4.The motor unit 202 comprises the output shaft 52, configured to connect to the working unit 4; the electric motor 70, configured to rotate the output shaft 52; the housing 50, which accommodates the electric motor 70; the second battery receptacle 204 (an example of a battery receptacle), located on the working unit 4 and configured to allow the battery device BD (an example of a battery) to be detachably attached to it; the cable 88, extending from the housing 50 and configured to connect to the second battery receptacle 204; and the control circuit board 74, located in the housing 50 and configured to control the output of the electric motor 70. When the battery device BD is attached to the second battery receptacle 204, power is supplied from the battery device BD to the electric motor 70 via the cable 88.

[0202] In the configuration described above, the battery device BD can be attached to the second battery receptacle 204, which is located on the working unit 4. Attaching the battery device BD to the second battery receptacle 204 reduces the transmission of vibrations from the housing 50 to the battery device BD, compared to attaching the battery device BD directly to the housing 50.

[0203] In one or more embodiments, the control circuit board 74 is arranged in the housing 50.

[0204] The fan wheel 72 for cooling the electric motor 70 is located in the housing 50. In the configuration described above, both the control circuit board 74 and the electric motor 70 can be cooled by a cooling airflow generated by the fan wheel 72. Therefore, it is not necessary to arrange another fan wheel 72 for cooling the control circuit board 74 at the motor unit 202, thus simplifying the configuration of the motor unit 202.

[0205] In one or more embodiments, the motor unit 202 further comprises the lower contact surface 66 (an example of a first surface) which is parallel to the axial direction of the output shaft 52, and the front contact surface 58 (an example of a second surface) which is perpendicular to the axial direction of the output shaft 52. The motor unit 202 is configured to be fixed to the working unit 4 with at least one of the lower contact surface 66 and the front contact surface 58 in contact with the working unit 4.

[0206] In the configuration described above, the motor unit 202 can be attached to the working units 4 in various orientations (e.g., with the lower contact surface 66 in contact with the working unit 4, with the front contact surface 58 in contact with the working unit 4, etc.). This results in an increase in the number of types of working units 4 to which the motor unit 202 can be attached.

[0207] In one or more embodiments, the working units 4 have handles 10, 302, 322, 342, 362, 382, ​​422, 442, which have a grip configured to be grasped by a user. The second battery receptacle 204 is located at one of the handles 10, 302, 322, 342, 362, 382, ​​422, 442.

[0208] In the configuration described above, the second battery receptacle 204 is located at one of the handles 10, 302, 322, 342, 362, 382, ​​422, or 442. The handles 10, 302, 322, 342, 362, 382, ​​422, or 442 can be configured to reduce the transmission of vibrations from the bodies of the working units 4, thus preventing discomfort for the user gripping the handle. Therefore, attaching the battery pack BP to the second battery receptacle 204 reduces the transmission of vibrations from the body of the working unit 4 to the battery pack BP. Furthermore, in the embodiment described above, the second battery receptacle 204 is located in a position that is easily accessible to the user. This allows the user to easily attach and remove the battery pack BP from the second battery receptacle 204.

[0209] In one or more embodiments, the second battery receptacle 204 is arranged on the upper surface of the working unit 4 when the working unit 4 is in its working position.

[0210] In the configuration described above, the second battery receptacle 204 is in a position that is easily accessible to the user when the work unit 4 is in its working position. This allows the user to easily attach the battery device BD to and remove the battery device BD from the second battery receptacle 204.

[0211] In one or more embodiments, the length of cable 88 is in the range of 100 mm to 2000 mm.

[0212] The cable 88 extends between the first battery holder 54, located on the housing 50, and the second battery holder 204, located on the working unit 4. If the length of the cable 88 were too long relative to the distance between the first and second battery holders 54, 204, the cable 88 could sag excessively and obstruct operation. Although the distance between the first and second battery holders 54, 204 varies depending on the working unit 4, it is generally expected to be in the range of 50 mm to 1500 mm. In the configuration described above, the length of the cable 88 is slightly longer than the expected distance between the first and second battery holders 54, 204. Thus, the configuration described above prevents the cable 88 from sagging excessively and therefore from obstructing operation.

[0213] In one or more embodiments, the adapter 82 is configured to be removablely attached to the first battery receptacle 54.

[0214] If the adapter 82 were configured to be permanently attached to the first battery receptacle 54, it could not be removed once attached. However, the user might wish to remove the adapter 82 from the first battery receptacle 54 after attaching it. For example, the user might wish to do so if they wanted to attach the battery pack BP to the first battery receptacle 54 instead of the adapter 82. In the configuration described above, the adapter 82 is permanently attached to the first battery receptacle 54. Thus, the adapter 82 can be removed from the first battery receptacle 54 after it has been attached. Therefore, the battery pack BP can be attached to the first battery receptacle 54 instead of the adapter 82.

[0215] In one or more embodiments, the working unit 4 functions as the rammer 4a, configured to tamp the ground. The working unit 4 has the handle 10, which has grips 20, 22, 24 configured to be gripped by a user. The second battery receptacle 204 is located on the handle 10.

[0216] In the configuration described above, the battery device BD is attached to the handle 10 of the rammer 4a. This reduces the transmission of vibrations from the housing 50 to the battery device BD and also reduces the transmission of vibrations from the working part 6 of the rammer 4a (an example of a body of the rammer) to the battery device BD.

[0217] In one or more embodiments, the working unit 4 functions as the plate compactor 4b, configured to compact the soil. The working unit 4 has the handle 302, which in turn has the grip 304 configured to be gripped by a user. The second battery receptacle 204 is located on the handle 302.

[0218] In the configuration described above, the battery device BD is attached to the handle 302 of the plate compactor 4b. This reduces the transmission of vibrations from the housing 50 to the battery device BD and also reduces the transmission of vibrations from the body 300 of the plate compactor 4b to the battery device BD.

[0219] In one or more embodiments, the working unit 4 functions as the trowel 4c, which is configured to smooth (level) a concrete surface. The working unit 4 has the handle 322, which has the grip 324 configured to be gripped by a user. The second battery receptacle 204 is located on the handle 322.

[0220] In the configuration described above, the battery pack BP is located on the handle 322 of the trowel 4c. This reduces the transmission of vibrations from the housing 50 to the battery device BD and also reduces the transmission of vibrations from the body 320 of the trowel 4c to the battery device BD.

[0221] In one or more embodiments, the working unit 4 functions as the concrete mixer 4d, configured to mix concrete. The working unit 4 has the handle 342, which has the grip 344 configured to be gripped by a user. The second battery receptacle 204 is located on the handle 342.

[0222] In the configuration described above, the battery device BD is attached to the handle 342 of the concrete mixer 4d. This reduces the transmission of vibrations from the housing 50 to the battery device BD and also reduces the transmission of vibrations from the body 340 of the concrete mixer 4d to the battery device BD.

[0223] In one or more embodiments, the working unit 4 functions as the concrete saw 4e, which is configured to make a cut in the concrete. The working unit 4 has the handle 362, which has the grip 364 configured to be gripped by a user. The second battery receptacle 204 is located on the handle 362.

[0224] In the configuration described above, the battery device BD is attached to the handle 362 of the concrete saw 4e. This reduces the transmission of vibrations from the housing 50 to the battery device BD and also reduces the transmission of vibrations from the body 360 of the concrete saw 4e to the battery device BD.

[0225] In one or more embodiments, the working unit 4 functions as the high-pressure cleaner 4f (or as the spray device 4g) (an example of a spraying device) configured to increase the pressure of a liquid and spray the liquid. The second battery receptacle 204 is attached to the upper surface of the working unit 4 when the working unit 4 is in its working position.

[0226] In the configuration described above, the battery device BD is attached to the upper surface of the high-pressure cleaner 4f (or spray device 4g). This reduces the transmission of vibrations from the housing 50 to the battery device BD.

[0227] In one or more embodiments, the working unit 4 functions as the mowing machine 4h. The working unit 4 has the handle 422, which has the grip 424 configured to be gripped by a user. The second battery receptacle 204 is located on the handle 422.

[0228] In the configuration described above, the battery device BD is attached to the handle 422 of the mower 4h. This reduces the transmission of vibrations from the housing 50 to the battery device BD and also reduces the transmission of vibrations from the body 420 of the mower 4h to the battery device BD.

[0229] In one or more embodiments, a working machine has a working unit 4 and a motor unit 202, which is configured to be removablely attached to the working unit 4 for driving the working unit 4 with power from the motor unit 202.

[0230] The configuration described above provides the working machine, which reduces the transmission of vibrations from the housing 50 to the battery device BD. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] WO 2020 / 049 617 A1 [0002, 0003]

Claims

[1] Motor unit (2) configured to be attached to any of several types of working units (4) to drive the working unit (4) to which the motor unit (2) is attached, wherein the motor unit (2) an output wave (52) configured to be connected to the work unit (4), an electric motor (70) configured to rotate the output shaft (52), a housing (50) that accommodates the electric motor (70), a first battery receptacle (54) which is arranged on the housing (50) and is configured to allow a first battery (BP) to be removably attached to it, a second battery receptacle (90) which is arranged on the working unit (4) and is configured to allow a second battery (BP) to be removably attached to it, an adapter (82) configured to be attached to the first battery receptacle (54) instead of the first battery (BP), a cable (88) extending from the adapter (82) and configured to connect either to the second battery receptacle (90) or the second battery (BP), and a control circuit board (74) configured to control an output of the electric motor (70), at the when the first battery (BP) is attached to the first battery holder (54), power is supplied from the first battery (BP) to the electric motor (70) via the first battery holder (54), and When the adapter (82) is attached to the first battery holder (54) and the second battery (BP) is attached to the second battery holder (90), power is supplied from the second battery (BP) to the electric motor (70) via the cable (88), the adapter (82) and the first battery holder (54). [2] Motor unit (2) according to claim 1, wherein the control switching board (74) is arranged in the housing (50). [3] Motor unit (2) according to claim 1 or 2, further comprising a first surface (66) that is parallel to an axial direction of the output shaft (52), and a second surface (58) that is perpendicular to the axial direction of the output shaft (52), in which the motor unit (2) is configured to be fixed to the working unit (4) with at least one of the first surface (66) and the second surface (58) in contact with the working unit (4). [4] Motor unit (2) according to one of claims 1 to 3, wherein at least one of the first battery (BP) and the second battery (BP) can supply power to an electrical device (T) that is different from the motor unit (2) when the at least one of the first battery (BP) and the second battery (BP) is located away from the motor unit (2) and is attached to the electrical device (T). [5] Motor unit (2) according to any one of claims 1 to 4, wherein the second battery (BP) comprises a plurality of second batteries (BP), the majority of second batteries (BP) have a majority of battery packs (BP), and The second battery receptacle (90) is configured to allow the majority of battery packs (BP) to be attached to it in a removable manner. [6] Motor unit (2) according to any one of claims 1 to 5, wherein the second battery (BP) has a battery pack (BP), and the motor unit (2) further comprises a cover (96) which covers the battery pack (BP) which is attached to the second battery receptacle (90). [7] Motor unit (2) according to any one of claims 1 to 6, wherein the working unit (4) has a handle (10, 302, 322, 342, 362, 382, ​​422, 442) which has a grip configured to be grasped by a user, and the second battery compartment (90) is located on the handle (10, 302, 322, 342, 362, 382, ​​422, 442). [8] Motor unit (2) according to any one of claims 1 to 6, wherein the second battery receptacle (90) is located on an upper surface of the working unit (4) when the working unit (4) is in a working position. [9] Motor unit (2) according to any one of claims 1 to 8, wherein the first battery receptacle (54) and the second battery receptacle (90) each have common components (46), and the common components (46) have a common shape relative to each other. [10] Motor unit (2) according to any one of claims 1 to 9, wherein the length of the cable (88) is in a range from 100 mm to 2000 mm. [11] Motor unit (2) according to any one of claims 1 to 10, wherein the adapter (82) is configured to be removablely attached to the first battery receptacle (54). [12] Motor unit (2) according to any one of claims 1 to 11, wherein the work unit (4) functions as a tamper (4a) configured to tamp a floor, the work unit (4) has a handle (10) which has a grip (20, 22, 24) configured to be gripped by a user, and the second battery compartment (90) is located on the handle (10). [13] Motor unit (2) according to any one of claims 1 to 11, wherein the working unit (4) functions as a plate compactor (4b) configured to compact soil, the working unit (4) has a handle (302) which has a grip (304) configured to be grasped by a user, and the second battery compartment (90) is located on the handle (302). [14] Motor unit (2) according to any one of claims 1 to 11, wherein the working unit (4) functions as a trowel (4c) configured to smooth a concrete surface, the working unit (4) has a handle (322) which has a grip (324) configured to be grasped by a user, and the second battery compartment (90) is located on the handle (322). [15] Motor unit (2) according to any one of claims 1 to 11, wherein the work unit (4) functions as a concrete mixer (4d) configured to mix concrete, the work unit (4) has a handle (342) which has a grip (344) configured to be grasped by a user, and the second battery compartment (90) is located on the handle (342). [16] Motor unit (2) according to any one of claims 1 to 11, wherein the work unit (4) functions as a concrete saw (4e) configured to cut in concrete, the work unit (4) has a handle (362) which has a grip (364) configured to be grasped by a user, and the second battery compartment (90) is located on the handle (362). [17] Motor unit (2) according to any one of claims 1 to 11, wherein the working unit (4) functions as a spray device (4f, 4g) configured to increase the pressure of a liquid and spray the liquid, and the second battery receptacle (90) is located on an upper surface of the working unit (4) when the working unit (4) is in a working position. [18] Motor unit (2) according to any one of claims 1 to 11, wherein the work unit (4) functions as a mowing machine (4h), the working unit (4) has a handle (422) which has a grip (424) configured to be grasped by a user, and the second battery compartment (90) is located on the handle (422). [19] Working machine, with a work unit (4), and a motor unit (2) configured to be detachably attached to the working unit (4) for driving the working unit (4), at the the motor unit (2) an output wave (52) configured to be connected to the work unit (4), an electric motor (70) configured to rotate the output shaft (52), a housing (50) that accommodates the electric motor (70), a first battery receptacle (54) which is arranged on the housing (50) and is configured to allow a first battery (BP) to be removably attached to it, a second battery receptacle (90) which is arranged on the working unit (4) and is configured to allow a second battery (BP) to be removablely attached to it, an adapter (82) configured to be attached to the first battery receptacle (54) instead of the first battery (BP), a cable (88) extending from the adapter (82) and configured to be connected either to the second battery receptacle (90) or to the second battery (BP), and a control circuit board (74) configured to control an output of the electric motor (70), at the when the first battery (BP) is attached to the first battery holder (54), power is supplied from the first battery (BP) to the electric motor (70) via the first battery holder (54), and When the adapter (82) is attached to the first battery holder (54) and the second battery (BP) is attached to the second battery holder (90), power is supplied from the second battery (BP) to the electric motor (70) via the cable (88), the adapter (82) and the first battery holder (54). [20] Motor unit (2) configured to be removablely attached to any of several types of working units (4) for driving the working unit (4) to which the motor unit (2) is attached, wherein the motor unit (2) an output wave (52) configured to be connected to the work unit (4), an electric motor (70) configured to rotate the output shaft (52), a housing (50) that accommodates the electric motor (70), a battery receptacle (90) which is arranged on the working unit (4) and is configured to allow a battery (BP) to be removablely attached to it, a cable (88) extending from the housing (50) and configured to be connected either to the battery receptacle (90) or to the battery (BP), and a control circuit board (74) which is included in the housing (50) and is configured to control an output of the electric motor (70), at the when the battery (BP) is attached to the battery holder (90), power is supplied from the battery (BP) to the electric motor (70) via the cable (88).

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