Work equipment

Abstract

To provide technique enabling suppression of the occurrence of a problem in which implement-side terminals in a battery storage space are short-circuited through water.SOLUTION: A work machine comprises: a work unit; an air blowing fan; a motor; a main body housing having a suction port; a battery pack which is detachably fitted to a battery fitting portion of the main body housing; a battery cover; and a plurality of implement side terminals. In a state in which the battery cover is closed, the battery storage space storing the battery pack is defined by the main body housing, the battery fitting portion, and the battery cover. Any of the main body housing, the battery fitting portion, and the battery cover defining the battery storage space, has a suction port communicating an air passage with the battery storage space. In the battery storage space in a work state of the work machine, the suction port is provided above the plurality of the implement side terminals.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a work machine. [Background technology]

[0002] Patent Document 1 discloses a work machine including a working unit, a blower fan, a motor for driving the working unit and the blower fan, a main housing having an intake hole, a battery pack detachable from a battery mounting portion of the main housing, an openable and closable battery cover provided on the main housing and covering the battery pack mounted on the battery mounting portion, and a plurality of device-side terminals extending upward from the battery mounting portion and electrically connected to a plurality of battery-side terminals of the battery pack. When the battery cover is closed, the main housing, the battery mounting portion, and the battery cover define a battery storage space for storing the battery pack. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-094796 Summary of the Invention [Problem to be solved by the invention]

[0004] In the work machine of Patent Document 1, when the motor is driven, the working unit and the blower fan are driven. When the blower fan is driven, air is drawn into the main body housing through an air intake hole provided in the main body housing. Generally, work machines with a battery cover are designed to seal the battery housing space when the battery cover is closed. Therefore, even when the blower fan is driven, air in the battery housing space is not drawn into the main body housing. However, in actual work machines, there is a small gap between the battery attachment part and the main body housing. Therefore, when the blower fan is driven, air in the battery housing space is drawn into the main body housing. In this case, the battery housing space is under negative pressure relative to the outside of the battery housing space. Therefore, if water adheres to the main body housing near the battery cover, the water is drawn into the battery housing space. The water drawn into the battery housing space may then adhere to multiple device-side terminals, potentially causing a short circuit between the device-side terminals.

[0005] This specification provides a technique that can prevent short-circuiting between device-side terminals in a battery housing space via water. [Means for solving the problem]

[0006] The working machine disclosed in this specification comprises a working unit, a blower fan, a motor for driving the working unit and the blower fan, a main housing having an intake hole, a battery pack detachable from a battery mounting portion of the main housing, an openable and closable battery cover provided on the main housing and covering the battery pack mounted on the battery mounting portion, and a plurality of device-side terminals extending upward from the battery mounting portion and electrically connected to a plurality of battery-side terminals of the battery pack, wherein when the battery cover is closed, a battery storage space for storing the battery pack is defined by the main housing, the battery mounting portion, and the battery cover, and any of the main housing, the battery mounting portion, and the battery cover that define the battery storage space has a suction hole that connects the air passage to the battery storage space, and the suction hole may be provided above the plurality of device-side terminals in the battery storage space when the working machine is in a working state.

[0007] Water drawn into the battery housing space flows downward. With the above configuration, when the blower fan is driven, the water drawn into the battery housing space is sucked into the suction hole on the upper side before reaching the device-side terminals on the lower side. This prevents water from adhering to the device-side terminals in the battery housing space. This prevents the device-side terminals in the battery housing space from shorting out due to water. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view of a lawnmower 2 according to a first embodiment, as seen from the upper right front. [Figure 2] 1 is a left side view of a lawnmower 2 according to a first embodiment, as viewed from the left. [Figure 3] 1 is a right cross-sectional view of a lawnmower 2 according to a first embodiment, as viewed from the right. [Figure 4]2 is a perspective view of a battery IF section 60 of the lawnmower 2 according to the first embodiment, as seen from the upper right rear. FIG. [Figure 5] 2 is a perspective view of a battery IF section 60 of the lawnmower 2 according to the first embodiment, as seen from the upper left rear. FIG. [Figure 6] 1 is a perspective view of a battery pack 200 according to a first embodiment, as viewed from the lower right rear. [Figure 7] 1 is a right cross-sectional view of a lawnmower 2 according to a first embodiment, as viewed from the right. [Figure 8] 10 is a perspective view of a battery IF section 60 of a lawnmower 2 according to a second embodiment, as viewed from the upper right rear. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Representative, non-limiting embodiments of the present invention are described in detail below with reference to the drawings. This detailed description is intended simply to provide those skilled in the art with details for implementing preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Furthermore, the additional features and inventions disclosed can be used separately or in conjunction with other features and inventions to provide further improved work machines.

[0010] Furthermore, the combinations of features and steps disclosed in the following detailed description are not essential to practicing the invention in its broadest sense, but are described solely to specifically illustrate exemplary embodiments of the invention. Furthermore, the various features of the following exemplary embodiments and those described in the claims do not necessarily have to be combined in the exact embodiments described herein or in the exact order listed to provide additional and useful embodiments of the invention.

[0011] All features described in this specification and / or claims are intended to be disclosed individually and independently of one another as limitations to the specific features described in the original disclosure and claims, apart from the configuration of features described in the examples and / or claims. Furthermore, all numerical ranges and group or aggregate descriptions are intended to disclose intermediate configurations thereof as limitations to the specific features described in the original disclosure and claims.

[0012] In one or more embodiments, a work machine includes a working unit, a blower fan, a motor that drives the working unit and the blower fan, a main housing having an air intake hole, a battery pack that is detachable from a battery mounting portion of the main housing, an openable and closable battery cover that is provided on the main housing and covers the battery pack that is mounted on the battery mounting portion, and a plurality of device-side terminals that extend upward from the battery mounting portion and are electrically connected to a plurality of battery-side terminals of the battery pack, wherein when the battery cover is closed, a battery storage space that stores the battery pack is defined by the main housing, the battery mounting portion, and the battery cover, and any of the main housing, the battery mounting portion, and the battery cover that define the battery storage space has a suction hole that communicates the air passage with the battery storage space, and the suction hole may be provided above the plurality of device-side terminals in the battery storage space when the work machine is in a working state.

[0013] In one or more embodiments, the battery pack may be attachable to and detachable from the battery mounting portion by sliding it in a sliding direction relative to the battery mounting portion. The sliding direction may be such that a first direction in which the battery pack is slid when attached to the battery mounting portion is inclined downward relative to a second direction in which the battery pack is slid when removed from the battery mounting portion. The battery mounting portion may include an inclined surface inclined in the sliding direction, on which the suction hole and the plurality of device-side terminals are arranged side by side in the sliding direction, and the suction hole may be located on the inclined surface closer to the second direction than the plurality of device-side terminals.

[0014] According to the above configuration, water sucked into the battery accommodating space flows along the inclined surface of the battery mounting portion from the second direction toward the first direction. Because the suction hole is located closer to the second direction than the device-side terminals, much of the water flowing from the second direction toward the first direction is sucked into the suction hole. This further prevents water from adhering to the device-side terminals in the battery accommodating space. Therefore, it is possible to further prevent short-circuiting between the device-side terminals in the battery accommodating space via water.

[0015] In one or more embodiments, the suction hole may extend in a third direction perpendicular to the sliding direction and the up-down direction, and the width of the suction hole in the third direction may be greater than the width between two device-side terminals located outermost on both sides of the third direction among the plurality of device-side terminals.

[0016] This configuration further prevents water passing through the inclined surface of the battery mounting portion from adhering to the device-side terminals, thereby further preventing short-circuiting between the device-side terminals in the battery accommodating space through water.

[0017] In one or more embodiments, the implement may be a lawn mower.

[0018] Lawn mowers are sometimes used in environments where there is a possibility of water adhering to the main housing, such as in rainy weather. Therefore, even if water adheres to the main housing, it is necessary to prevent the device terminals in the battery housing space from shorting out due to water. With the above configuration, even if water is drawn into the battery housing space, it is possible to prevent water from adhering to the multiple device terminals. Therefore, in the lawn mower, it is possible to prevent the device terminals in the battery housing space from shorting out due to water.

[0019] (First Example) As shown in Figure 1, the lawnmower 2 comprises a main body unit 4 and a handle unit 6. A pair of wheels 8 is provided at the front of the main body unit 4. As shown in Figure 2, a roller 10 extending in the left-right direction is provided at the rear of the main body unit 4. A grass collection container 12 is also detachably attached to the rear of the main body unit 4. The lawnmower 2 operates while in contact with the ground.

[0020] (Configuration of main unit 4) As shown in FIG. 1, the main unit 4 includes a main housing 20 and an openable / closable battery cover 22. The main housing 20 includes a first upper housing 24, a second upper housing 26, an intermediate housing 28, a first lower housing 30 (see FIG. 3), and a second lower housing 32 (see FIG. 3). A right air intake hole 20b extending in the front-rear direction is provided on the right surface 20a of the main housing 20. As shown in FIG. 2, a left air intake hole 20d extending in the front-rear direction is provided on the left surface 20c of the main housing 20. The right air intake hole 20b (see FIG. 2) and the left air intake hole 20d are formed by connecting the first upper housing 24 and the intermediate housing 28.

[0021] As shown in FIG. 3 , an exhaust hole 20e is provided at the rear of the main housing 20. The space inside the main housing 20 accommodates a motor 40, a blower fan 42, a cutting blade 44, and a control board (not shown). The motor 40 may be a brushless DC motor, a brushed DC motor, or another type of motor such as an AC motor. The control board controls the operation of the motor 40. The motor 40 is located between the first upper housing 24 and the middle housing 28 in the vertical direction. An opening 28a is provided in the middle housing 28 below the motor 40. An output shaft 46 extending in the vertical direction is connected to the motor 40. The output shaft 46 passes through the opening 28a in the middle housing 28 in the vertical direction. A first flange 52 and a second flange 54 are fixed to the lower end of the output shaft 46 via a bolt 48 and a washer 50. The first flange 52 is located above the second flange 54. The blower fan 42 is fixed to the first flange 52. The cutting blade 44 is sandwiched between the first flange 52 and the second flange 54 in the vertical direction. The blower fan 42 and the cutting blade 44 are provided between the intermediate housing 28 and the first lower housing 30 in the vertical direction. The cutting blade 44 is provided below the blower fan 42. When the motor 40 rotates the output shaft 46, the output shaft 46, the first flange 52, the second flange 54, the blower fan 42, and the cutting blade 44 rotate integrally. An air passage AP is defined in the space inside the main housing 20, through which air passes when the blower fan 42 is driven.

[0022] A battery interface (hereinafter, sometimes referred to as "IF") section 60 is provided at the rear of the first upper housing 24 of the main body housing 20. The battery pack 200 can be attached to and detached from the battery IF section 60 by sliding the battery pack 200 in a sliding direction relative to the battery IF section 60. The sliding direction is such that the attachment direction side, along which the battery pack 200 is slid when attached to the battery IF section 60, is inclined downward from the removal direction side, along which the battery pack 200 is slid when removed from the battery IF section 60.

[0023] As shown in FIG. 4, the battery IF unit 60 includes an IF front surface 60a, an IF right surface 60b (see FIG. 5), an IF left surface 60c, an IF bottom surface 60d, an IF right rear surface 60e, an IF left rear surface 60f, and an IF center rear surface 60g. The IF front surface 60a is aligned with the left-right direction, inclined downward toward the rear, and faces upward and rearward. As shown in FIG. 5, the IF right surface 60b is aligned with the front-rear and up-down directions and faces leftward. As shown in FIG. 4, the IF left surface 60c is aligned with the front-rear and up-down directions and faces rightward. The IF bottom surface 60d is aligned with the front-rear and up-down directions and faces upward. A right drainage hole 61a (see FIG. 5) is provided at the right end of the IF bottom surface 60d, penetrating the first upper housing 24 in the up-down direction, and a left drainage hole 61b is provided at the left end of the IF bottom surface 60d, penetrating the first upper housing 24 in the up-down direction. The IF central rear surface 60g is aligned with the left-right direction and the sliding direction and faces upward and forward. The IF central rear surface 60g is located between the IF right rear surface 60e and the IF left rear surface 60f in the left-right direction. The IF right rear surface 60e and the IF left rear surface 60f are aligned with the front-rear direction and the left-right direction and are arranged facing upward. The battery IF section 60 further includes a peripheral rib 62 that surrounds the IF front surface 60a, the IF right surface 60b (see FIG. 5), the IF left surface 60c, the IF right rear surface 60e, the IF left rear surface 60f, and the IF central rear surface 60g. A first engaged portion 62a is provided at the rear of the peripheral rib 62 and engages with a first engaging portion 22a (see FIG. 3) of the battery cover 22, which will be described later.

[0024] The battery IF section 60 further includes a mounting unit 66. As shown in FIG. 4, the mounting unit 66 includes a mounting housing 68, a terminal support section 70, and three lawnmower-side terminals 72a-72c. The mounting unit 66 is arranged parallel to the sliding direction. The mounting housing 68 is fixed to the first upper housing 24 and the middle housing 28 with screws. The mounting housing 68 is composed of a right mounting housing 74 and a left mounting housing 76. A first right rail 74b is provided at the right end of the right upper surface 74a of the right mounting housing 74. A first left rail 76b is provided at the left end of the left upper surface 76a of the left mounting housing 76. A right cutout 74c recessed to the right is provided at the rear of the right upper surface 74a of the right mounting housing 74. A left cutout 76c recessed to the left is provided at the rear of the left upper surface 76a of the left mounting housing 76. A suction hole 78 that penetrates the mounting housing 68 in the vertical direction is defined by the right cutout 74c of the right mounting housing 74 and the left cutout 76c of the left mounting housing 76. A second engaged portion 80 is provided in the mounting housing 68 forward of the suction hole 78. A second engaging portion 204a (see FIG. 6) of the battery pack 200, which will be described later, engages with the second engaged portion 80. The left-right width of the second engaged portion 80 is greater than the left-right width of the suction hole 78. In this embodiment, the ratio of the intake hole area, which is the sum of the opening area of ​​the right intake hole 20b (see FIG. 1) and the opening area of ​​the left intake hole 20d (see FIG. 2) of the main housing 20, to the suction hole area, which is the opening area of ​​the suction hole 78, is approximately 20:1. The ratio of the intake hole area to the suction hole area should be between 15:1 and 25:1.

[0025] The terminal support part 70 is held by the mounting housing 68. A protrusion 70b is provided at the front of the terminal support part 70, protruding from the top surface 70a in a direction perpendicular to the sliding direction. Three lawnmower side terminals 72a to 72c are held by the terminal support part 70. The three lawnmower side terminals 72a to 72c are arranged side by side in the left-right direction. The three lawnmower side terminals 72a to 72c extend outward (rearward) from the protrusion 70b and also extend upward (upward) from the top surface 70a of the terminal support part 70 in a direction perpendicular to the sliding direction. The left-right width of the suction hole 78 is smaller than the distance between the rightmost lawnmower side terminal 72a and the leftmost lawnmower side terminal 72c. In the mounting unit 66, the suction hole 78 is located closer to the mounting direction (rearward) than the three lawnmower side terminals 72a to 72c. That is, because the mounting unit 66 is aligned in the sliding direction, the suction hole 78 is located above the three lawnmower terminals 72a to 72c. Specifically, the suction hole 78 is located above the lower ends of the three lawnmower terminals 72a to 72c.

[0026] As shown in FIG. 3, the battery cover 22 is attached to the main housing 20 so as to cover the outside of the battery pack 200 attached to the battery interface 60. The following description of the battery cover 22 will be based on the up-down and left-right directions when the battery cover 22 is closed. As shown in FIG. 1, the front portion of the battery cover 22 is supported rotatably around a rotation axis (not shown) extending in the left-right direction relative to the second upper housing 26 of the main housing 20. As shown in FIG. 3, a first engagement portion 22a is provided. The first engagement portion 22a engages with a first engaged portion 62a of a peripheral rib 62 of the battery interface 60. An operating portion 22b protruding rearward is provided above the first engagement portion 22a on the battery cover 22. The operating portion 22b is inclined so that its front side is positioned downward. A user can open or close the battery cover 22 using the operating portion 22b. The main housing 20, the battery cover 22, and the battery interface 60 define a battery storage space BS. The suction hole 78 connects the battery accommodating space BS with the air passage AP inside the main housing 20 .

[0027] (Configuration of handle unit 6) As shown in FIG. 1, the handle unit 6 is connected to the upper rear part of the main unit 4. The handle unit 6 includes a grip 90 that the user holds, a lever 92, and a lock-off button 94. When the user pulls up the lever 92 while the lock-off button 94 is pressed, power is supplied from the battery pack 200 (see FIG. 3) to the motor 40 (see FIG. 3). On the other hand, even if the operator pulls up the lever 92 without pressing the lock-off button 94, power is not supplied from the battery pack 200 (see FIG. 3) to the motor 40 (see FIG. 3). In other words, when the operator pulls up the lever 92 while the lock-off button 94 is pressed, the blower fan 42 and the cutting blade 44 (see FIG. 3) are driven.

[0028] (Configuration of battery pack 200) As shown in FIG. 6, the battery pack 200 includes a battery housing 202. The battery housing 202 houses a plurality of battery cells (not shown). The battery housing 202 includes a hook 204, a second right rail 206 attached to the right end of the battery housing 202, and a second left rail 208 attached to the left end of the battery housing 202. The second right rail 206 and the second left rail 208 have shapes corresponding to the first right rail 74b and the first left rail 76b of the lawnmower 2, respectively (see FIG. 4). The hook 204 includes a second engagement portion 204a and a battery operating portion 204b. The hook 204 is biased toward the outside of the battery housing 202 by a spring (not shown). When the battery pack 200 is attached to the battery IF unit 60 (see FIG. 4) of the lawnmower 2, the second engaging portion 204a of the hook 204 fits into the second engaged portion 80 (see FIG. 3) formed on the battery IF unit 60 of the lawnmower 2, thereby securing the battery pack 200 to the battery IF unit 60. From this state, when the battery operating portion 204b of the hook 204 is pushed up, the second engaging portion 204a comes out of the second engaged portion 80 (see FIG. 3). In this state, the battery pack 200 can be slid relative to the battery IF unit 60, and the battery pack 200 can be removed from the battery IF unit 60.

[0029] As shown in FIG. 4, in this embodiment, the width of the suction hole 78 in the left-right direction is smaller than the width of the second engagement portion 204a in the left-right direction. Let us assume a situation in which the width of the suction hole 78 in the left-right direction is larger than the width of the second engagement portion 204a (see FIG. 6) and the battery pack 200 (see FIG. 6) is removed from the battery IF unit 60. First, the user pushes up the battery operating portion 204b (see FIG. 6) of the hook 204. This causes the second engagement portion 204a (see FIG. 6) to come out of the second engaged portion 80. Then, the user moves the battery pack 200 (see FIG. 6) in the removal direction relative to the battery IF unit 60. Between the second engaged portion 80 and the suction hole 78, the user releases their finger from the battery operating portion 204b (see FIG. 6) and further moves the battery pack 200 (see FIG. 6) in the removal direction relative to the battery IF unit 60. If the width of the suction hole 78 in the left-right direction is larger than the width of the second engagement portion 204a (see FIG. 6 ), the second engagement portion 204a (see FIG. 6 ) will get stuck in the suction hole 78. In this case, the user needs to push up the battery operating portion 204b (see FIG. 6 ) again to remove the second engagement portion 204a (see FIG. 6 ) from the suction hole 78. To avoid this situation, the user needs to keep pushing up the battery operating portion 204b (see FIG. 6 ) until the second engagement portion 204a (see FIG. 6 ) is moved further outward than the suction hole 78. This operation is cumbersome for the user. Therefore, in this embodiment, the width of the suction hole 78 in the left-right direction is smaller than the width of the second engagement portion 204a (see FIG. 6 ). With this configuration, the second engagement portion 204a (see FIG. 6 ) will not get stuck in the suction hole 78. That is, the user does not need to push up the battery operating portion 204b (see FIG. 6) after the second engaging portion 204a (see FIG. 6) has been released from the second engaged portion 80. This improves user convenience.

[0030] Next, the operation of the lawnmower 2 will be described with reference to Figures 3 and 7. In Figure 3, when the user pulls up the lever 92 (see Figure 1) while pressing the lock-off button 94 (see Figure 1), power is supplied from the battery pack 200 to the motor 40, and the blower fan 42 and the cutting blade 44 are driven. Driving the cutting blade 44 cuts the grass. When the blower fan 42 is driven, air near the motor 40 inside the main housing 20 is drawn toward the blower fan 42, creating a negative pressure near the motor 40. In this case, air is drawn into the inside of the main housing 20 (specifically, near the motor 40) through the right air intake hole 20b (see Figure 1) and the left air intake hole 20d (see Figure 2) of the main housing 20. The blower fan 42 generates an air flow F1 in the space inside the main housing 20, which flows from near the motor 40 toward the blower fan 42, and an air flow F2 in which the grass flows toward the grass collection container 12 (see FIG. 1). As a result, the grass cut by the cutting blade 44 passes through the exhaust hole 20e and is sent into the grass collection container 12 (see FIG. 1). The motor 40 is also cooled. The air in the battery storage space BS is also drawn into the inside of the main housing 20 (specifically, near the motor 40).

[0031] Generally, the battery cover 22 is designed to seal the battery accommodating space BS when it is closed. However, for example, in the battery IF section 60, a small gap may exist between the first upper housing 24 and the mounting housing 68. Therefore, when the blower fan 42 is driven, air in the battery accommodating space BS is sucked into the inside of the main housing 20 (specifically, the air passage AP) through the small gap. In this case, a negative pressure state occurs in the battery accommodating space BS. In this situation, if water adheres to the first upper housing 24 near the lower end of the battery cover 22, the water on the first upper housing 24 may be sucked into the battery accommodating space BS, as shown by arrow F3 in FIG. 7 . If the battery IF unit 60 did not have a suction hole 78, water drawn into the battery housing space BS would pass through the IF central rear surface 60g, the right upper surface 74a of the right mounting housing 74, the left upper surface 76a of the left mounting housing 76, and the upper surface 70a of the terminal support portion 70, and reach the three lawnmower terminals 72a-72c. This could result in a short circuit between the three lawnmower terminals 72a-72c. Therefore, in this embodiment, the battery IF unit 60 is provided with a suction hole 78. In this case, even if water is drawn into the battery housing space BS, as indicated by arrow F4 in FIG. 7 , the water drawn into the battery housing space BS passes through the IF central rear surface 60g and is drawn into the suction hole 78. That is, the water is drawn into the air passage AP through the suction hole 78 before reaching the three lawnmower terminals 72a-72c. This prevents water drawn into the battery housing space BS from adhering to the three lawnmower terminals 72a-72c. This prevents the three lawnmower terminals 72a-72c from shorting out. Water drawn into the suction holes 78 passes through the space inside the main housing 20 and is drained to the outside. Hereinafter, the IF central rear surface 60g, the right upper surface 74a of the right mounting housing 74, the left upper surface 76a of the left mounting housing 76, and the upper surface 70a of the terminal support portion 70 may be collectively referred to as the "inclined surfaces."

[0032] 3 and 7, a lawnmower 2 (an example of a "working machine") includes a cutting blade 44 (an example of a "working unit"), a blower fan 42, a motor 40 that drives the cutting blade 44 and the blower fan 42, a main housing 20 having right and left air intakes 20b and 20d, a battery pack 200 that is detachably attached to a battery IF unit 60 (an example of a "battery attachment unit") of the main housing 20, an openable and closable battery cover 22 that is attached to the main housing 20 and covers the battery pack 200 attached to the battery IF unit 60, and three lawnmower-side terminals 72a-72c (an example of a "plurality of device-side terminals") that extend upward from the battery IF unit 60 and are electrically connected to multiple battery-side terminals of the battery pack 200. When the battery cover 22 is closed, the main housing 20, the battery IF unit 60, and the battery cover 22 define a battery storage space BS that stores the battery pack 200. The main body housing 20, the battery IF section 60, and the battery IF section 60 of the battery cover 22, which define the battery storage space BS, are equipped with suction holes 78 that connect the air passage AP to the battery storage space BS. When the lawnmower 2 is in a grounded position (an example of an "operating state"), the suction holes 78 are located above the three lawnmower terminals 72a-72c in the battery storage space BS. Water drawn into the battery storage space BS flows downward. With this configuration, when the blower fan 42 is driven, water drawn into the battery storage space BS is drawn into the suction holes 78 located above the three lawnmower terminals 72a-72c located below. This prevents water from adhering to the three lawnmower terminals 72a-72c within the battery storage space BS. This prevents the three lawnmower terminals 72a-72c within the battery storage space BS from shorting out due to water. Furthermore, the lawnmower 2 may be used in an environment where it is raining or where there is a possibility that water may adhere to the main housing 20. For this reason, even if water adheres to the main housing 20, it is necessary to prevent the three lawnmower-side terminals 72a to 72c in the battery housing space BS from shorting out due to water.With the above configuration, even if water is sucked into the battery storage space BS, it is possible to prevent the water from adhering to the three lawnmower side terminals 72a to 72c, and in the lawnmower 2, it is possible to prevent the three lawnmower side terminals 72a to 72c in the battery storage space BS from short-circuiting due to water.

[0033] In one or more embodiments, as shown in FIGS. 3 and 7 , the battery pack 200 can be attached to and detached from the battery IF unit 60 by sliding it in a sliding direction relative to the battery IF unit 60. The sliding direction is such that the attachment direction (an example of a “first direction”), in which the battery pack 200 is slid when attached to the battery IF unit 60, is inclined downward from the removal direction (an example of a “second direction”), in which the battery pack 200 is slid when removed from the battery IF unit 60. The battery IF unit 60 is inclined in the sliding direction and has an inclined surface on which a suction hole 78 and three lawnmower-side terminals 72a-72c are aligned in the sliding direction. The suction hole 78 is located on the inclined surface on the outward side of the three lawnmower-side terminals 72a-72c. With the above configuration, water drawn into the battery housing space BS flows down the inclined surface of the battery IF unit 60 from the removal direction toward the attachment direction. Because the suction hole 78 is located further outward than the three lawnmower terminals 72a-72c, much of the water flowing from the outward direction toward the mounting direction is sucked into the suction hole 78. This further prevents water from adhering to the three lawnmower terminals 72a-72c inside the battery housing space BS. This further prevents the three lawnmower terminals 72a-72c inside the battery housing space BS from shorting out with each other via water.

[0034] (Second Example) Next, a lawnmower of a second embodiment will be described with reference to Figure 8. In the lawnmower of the second embodiment, the shape of the suction holes 378 is different from the shape of the suction holes 78 of the lawnmower 2 of the first embodiment.

[0035] As shown in FIG. 8 , a right-side cutout 374c recessed to the right is provided at the rear of the right upper surface 74a of the right mounting housing 74. A left-side cutout 376c recessed to the left is provided at the rear of the left upper surface 76a of the left mounting housing 376. A suction hole 378 extending vertically through the mounting housing 68 is defined by the right-side cutout 374c of the right mounting housing 74 and the left-side cutout 376c of the left mounting housing 76. The right end of the right-side cutout 374c is located to the right of the rightmost lawnmower terminal 72a of the three lawnmower terminals 72a-72c. The left end of the left-side cutout 376c is located to the left of the leftmost lawnmower terminal 72c of the three lawnmower terminals 72a-72c. Therefore, the width of the suction hole 378 in the left-right direction is greater than the width between the rightmost lawnmower terminal 72a and the leftmost lawnmower terminal 72c. The width of the suction hole 378 in the left-right direction is also greater than the width of the second engaged portion 80.

[0036] In one or more embodiments, the suction hole 378 extends in the left-right direction (an example of a "third direction"). The width of the suction hole 378 in the left-right direction is greater than the width between the two outermost lawnmower terminals 72a, 72c on both sides of the three lawnmower terminals 72a-72c in the left-right direction. This configuration further prevents water passing through the sloped surface of the battery IF unit 60 from adhering to the three lawnmower terminals 72a-72c. This further prevents the three lawnmower terminals 72a-72c in the battery housing space BS from shorting out due to water.

[0037] (First Variation) The "working machine" is not limited to a lawnmower 2 that operates while in contact with the ground. The "working machine" may also be a handheld working machine such as a chainsaw, pole saw, brush cutter, or hedge trimmer. The "working machine" may also be a shoulder-mounted sprayer. The "working machine" may also be a high-pressure washer that operates while in contact with the ground. The "working machine" may also be a scarifier, cultivator, or the like that operates while in contact with the ground.

[0038] (Second Modification) The suction hole 78 may be located further in the mounting direction, or to the left or right of the three lawnmower terminals 72a-72c. In other words, the suction hole 78 may be located in a position where it can suck in water drawn into the battery housing space BS above the three lawnmower terminals 72a-72c. Furthermore, the suction hole may be provided in the main body housing 20 or the battery cover 22, which define the battery housing space BS.

[0039] (Third Modification) The sliding direction may be perpendicular to the up-down direction, or may be parallel to a plane including the front-rear and left-right directions.

[0040] (Fourth variant) The left-right width of the suction hole 78 in the first embodiment may be the same as the left-right width between the lawnmower side terminal 72a located on the far right and the lawnmower side terminal 72c located on the far left, or may be the same as the width of the second engaged portion 80.

[0041] (Fifth Modification) The lawnmower 2 may have multiple suction holes. The multiple suction holes may be arranged side by side in the left-right direction, or may be arranged side by side in the sliding direction. [Explanation of symbols]

[0042] 2: Lawnmower 4: Main unit 6: Handle unit 8: Wheels 10: Laura 12: Grass collection container 20: Main body housing 20a: Right side 20b: Right side intake hole 20c: left side 20d: Left air intake 20e: Exhaust hole 22: Battery cover 22a: First engaging part 22b: Operation section 24: First upper housing 26: Second upper housing 28: Intermediate housing 28a:Aperture 30: First lower housing 32: Second lower housing 40: Motor 42: Blower fan 44:Kariblade 46: Output shaft 48: Bolt 50: Washer 52: First flange 54: Second flange 60: Battery IF section 60a :IF front 60b :IF right side 60c :IF left side 60d:IF bottom 60e :IF right rear side 60f :IF left rear 60g :IF center rear 61a: Right side drain hole 61b: Left side drainage hole 62: Peripheral rib 62a: First engaged part 66: Mounting unit 68: Mounting housing 70: Terminal support part 70a:Top surface 70b:Protrusion 72a: Lawnmower side terminal 72b: Lawnmower side terminal 72c: Lawnmower terminal 74: Right-side mounting housing 74a:Top right side 74b: First right rail 74c: Right side notch 76: Left side mounting housing 76a:Top left side 76b: First left rail 76c: Left side notch 78: Suction hole 80: Second engaged part 90: Grip 92: Lever 94: Lock-off button 200: Battery pack 202: Battery housing 204: Hook 204a: Second engaging part 204b: Battery operation unit 206: Second right rail 208: Second left rail 374c: Right side notch 376: Left-side mounting housing 376c: Left side notch 378: Suction hole AP: Air passage BS: Battery storage space

Claims

1. A work machine, A working section; A blower fan and a motor that drives the working unit and the blower fan; a main body housing having an intake hole and an exhaust hole; a battery pack detachable from a battery mounting portion of the main body housing; an openable and closable battery cover provided on the main body housing and covering the battery pack attached to the battery attachment portion; a plurality of device-side terminals extending upward from the battery mounting portion and electrically connected to a plurality of battery-side terminals of the battery pack, an air passage is provided inside the main body housing through which air flows from the intake hole to the exhaust hole when the blower fan is driven; When the battery cover is closed, the main body housing, the battery attachment portion, and the battery cover define a battery accommodating space that accommodates the battery pack, any one of the main body housing, the battery attachment portion, and the battery cover, which define the battery accommodating space, has a suction hole that communicates the air passage with the battery accommodating space; the suction hole is provided above the plurality of device-side terminals in the battery accommodating space when the work machine is in a working state, the battery pack is attachable to and detachable from the battery mounting portion by sliding the battery pack in a sliding direction relative to the battery mounting portion; the sliding direction is such that a first direction side in which the battery pack is slid when the battery pack is attached to the battery mounting portion is inclined downward relative to a second direction side in which the battery pack is slid when the battery pack is detached from the battery mounting portion, the battery attachment portion includes an inclined surface that is inclined in the sliding direction and on which the suction hole and the plurality of device-side terminals are arranged in the sliding direction, In the inclined surface, the suction hole is provided on the second direction side of the plurality of device-side terminals. Work equipment.

2. the suction hole extends in a third direction perpendicular to the sliding direction and the up-down direction, The work machine according to claim 1, wherein the width of the suction hole in the third direction is greater than the width between the two outermost device side terminals on both sides of the third direction among the plurality of device side terminals.

3. The work machine according to claim 1 or 2, wherein the work machine is a lawnmower.

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