Power shovels

Abstract

This invention provides a technique that makes it difficult for foreign objects to be sucked in through the air intake. According to one aspect of the invention, a power-operated machine is provided. The power-operated machine includes a working section, a drive section, a main body section, and an air supply section. The working section acts on the work object. The drive section drives the working section. The main body section has a bottom surface, an air intake, and an exhaust port, and forms a storage space for the drive section and a ventilation path from the air intake through the storage space to the exhaust port. The air supply section generates an airflow toward the exhaust port in the ventilation path. In a first state where the power-operated machine is positioned with its bottom surface facing a horizontal plane, the air intake opens in a direction having a vertically downward component.

Description

Technical Field

[0001] This invention relates to power work machines. Background Technology

[0002] Patent document 1 discloses a technology in which a chainsaw with a motor is installed in the cooling path inside the main body shell has an air intake that opens into the main body shell.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Publication No. 2021-30313 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In the technology of Patent Document 1, since air is drawn in from the side of the main shell, foreign objects such as chips generated by the operation of a chainsaw can easily enter the interior.

[0008] In view of the above, the present invention provides a technology that makes it difficult for foreign objects to be sucked in through the air inlet.

[0009] Solution for solving the problem

[0010] (1) According to one aspect of the present invention, a power work machine is provided. The power work machine includes a working part, a drive part, a main body part, and an air supply part. The working part acts on a work object. The drive part drives the working part. The main body part has a bottom part, an air inlet, and an air outlet, and forms a storage space for housing the drive part and a ventilation path from the air inlet through the storage space to the air outlet. The air supply part generates an airflow toward the air outlet in the ventilation path. The air inlet opens in a direction having a vertically downward component in a first state in which the power work machine is placed with its bottom part facing a horizontal plane.

[0011] This method makes it difficult for foreign objects to be sucked in through the air intake. Attached Figure Description

[0012] Figure 1 This is a block diagram representing the overall structure of chainsaw 1.

[0013] Figure 2 This is a diagram showing the appearance of chainsaw 1.

[0014] Figure 3 This is a diagram showing the chainsaw 1 as viewed from the front.

[0015] Figure 4 This is a diagram showing the chainsaw 1 viewed from above.

[0016] Figure 5 This is a diagram showing the chainsaw 1 viewed from below.

[0017] Figure 6 yes Figure 3 The view shown is AA.

[0018] Figure 7 This is a diagram showing the chainsaw 1 as viewed from behind.

[0019] Figure 8 yes Figure 5 The view shown is from the BB direction.

[0020] Figure 9 It is an enlarged representation Figure 8 The diagram shows ventilation path 20. Detailed Implementation

[0021] The embodiments of the present invention will be described below with reference to the accompanying drawings. The various features shown in the embodiments described below can be combined with each other.

[0022] <Implementation Method>

[0023] In this embodiment, as an example of a power work machine according to the present invention, a chainsaw for cutting trees or boards will be described.

[0024] Figure 1 This is a block diagram showing the overall structure of the chainsaw 1. The chainsaw 1 includes a main body 2, a working part 3, a control part 4, a drive part 5, an air supply part 6, and a battery 7. The main body 2 includes a housing 21 and an air intake part 22. The housing 21 is a box-shaped part that holds the other parts. The housing 21 houses the control part 4, the drive part 5, and the air supply part 6 in a storage space 211 provided inside, and also houses and holds the operation receiving part 42. In addition, the housing 21 exposes and holds the working part 3 to the outside, and can detachably hold the battery 7.

[0025] The housing 21 has an internal ventilation path 20 for cooling airflow to the cooling control unit 4 and the drive unit 5 (particularly the motor). An intake unit 22 is installed in the housing 21, forming the intake port 221 side of the ventilation path 20. The housing 21 has a handle portion 23. The handle portion 23, which serves as a grip when the operator uses the chainsaw 1, has a lever 43. By gripping the handle portion 23 and operating the lever 43, the operator receives an ON signal from the control unit 42. The working unit 3 contacts and directly acts on the work object when the operator uses the chainsaw 1. In this embodiment, the work object is trees and planks, etc., and the working unit 3 functions to cut the trees and planks.

[0026] The control unit 4, drive unit 5, and operation receiving unit 42 all operate using power supplied from the battery 7. The operation receiving unit 42 is located inside the housing 21 on the handle side 23 and receives operator input via the operator's operating lever 43. The control unit 4 controls the operation of the drive unit 5 based on signals sent by the operation receiving unit 42 through the operator's gripping of the lever 43. Furthermore, the control unit 4 is mounted on a control board and includes an integrated circuit, enabling the generation and transmission of control signals. The drive unit 5 includes a motor and a sprocket; based on the drive signal from the control unit 4, it rotates the motor by switching an inverter (not shown), thereby driving the operating unit 3.

[0027] The air supply unit 6 is a fan, mounted on a motor located in the ventilation passage 20. The rotation of the motor causes the fan to rotate, generating an airflow that cools the heat-generating components (control unit 4 or drive unit 5) that generate heat when driving the chainsaw 1. The cooling air may be drawn in, for example, from the air intake 221 of the air intake unit 22 mounted on the main body 2, passing through the ventilation passage 20 on the inlet side, cooling the heat-generating components housed in the storage space 211, and then discharged from the exhaust port 212.

[0028] Figure 2 This is a diagram showing the appearance of chainsaw 1. In Figure 2 The image shows chainsaw 1 as viewed from the left. In chainsaw 1, the definitions of the up-down, front-back, and left-right directions are as follows: Figure 2 As shown. Regarding the chainsaw 1, in this embodiment, the vertical direction when the chainsaw 1 is placed on a flat, horizontal surface is defined as the up-down direction. Furthermore, the front-back direction is defined as a direction orthogonal to the up-down direction, and the left-right direction is defined as a direction orthogonal to both the up-down and front-back directions. The front-back and left-right directions will be explained in detail later.

[0029] exist Figure 2 The diagram shows the main body 2, the working part 3, and the battery 7. The working part 3 includes a guide rod 31 and a saw chain 32. The guide rod 31 is a plate-shaped component extending in the front-rear direction, and its rear end is mounted on the main body 2. A ring-shaped saw chain 32 is wound around the outer periphery of the guide rod 31. The saw chain 32 and... Figure 1 The drive gear of the drive unit 5 shown is engaged.

[0030] The drive gear is driven to rotate by the motor in the drive unit 5. Figure 1The control unit 4 shown performs control processing to control the rotation of the motor via the operator's operating lever 43. The battery 7 is elongated and is inserted into and held relative to the main body 2, supplying power to the control unit 4 and the drive unit 5, etc. With the above structure, when the operator operates the lever 43, the motor controlled by the control unit 4 rotates the sprocket, and the rotational power is used to rotate the saw chain 32 along the outer periphery of the guide rod 31.

[0031] exist Figure 2 The diagram shows the housing 21, suction section 22, handle section 23, and bottom section 24 of the main body 2. The bottom section 24 is the portion that contacts the mounting surface when the chainsaw 1 is placed on a flat mounting surface. In this embodiment, the bottom section 24 includes a flat surface that contacts the mounting surface, but even if it has a shape that contacts the mounting surface through multiple edges or points, it is acceptable as long as the chainsaw 1 is stable when placed on the mounting surface. Hereinafter, the state in which the chainsaw 1 is placed with its bottom section 24 facing the horizontal surface is referred to as the horizontal mounting state. The horizontal mounting state is an example of the "first state" of the present invention. In the horizontal mounting state, the vertical direction of the chainsaw 1 is aligned with the vertical direction.

[0032] The intake section 22 has an intake port 221, forming the inlet side of the ventilation path formed inside the main body 2, i.e., the intake port 221 side. The ventilation path formed by the intake section 22 and the ventilation path formed by the housing 21 are connected inside the main body 2, forming a ventilation path from the inlet (intake port 221) to the outlet (exhaust port described later). Along the path of the ventilation path, Figure 1 The storage space 211 shown contains a control unit 4 and a drive unit 5, as well as a motor, which are cooled by cooling air drawn in from the air intake 221.

[0033] Furthermore, the intake section 22 has a front fixing part 222-1 and a rear fixing part 222-2 (hereinafter referred to as "fixing part 222" without distinction). The fixing part 222 is a hole for screwing in screws or the like to fix the intake section 22 to the housing 21. The fixing part 222-1 also serves as a fixing part for fixing the handle section 23 to the housing 21. In this way, the intake section 22 can be attached to and detached from the housing 21.

[0034] The handle section 23 includes a front handle 231, a rear handle 232, and a hand guard 233. The front handle 231 is located on the front side of the main body 2, and the rear handle 232 is located on the rear side of the main body 2. Both the front handle 231 and the rear handle 232 are held (gripped) by the operator during electric operation. Regardless of the direction of the object being cut, the operator can operate the lever 43 while holding the rear handle 232. The hand guard 233 protects the hand holding the front handle 231 from injury such as being cut by branches. In addition, the hand guard 233 can also function as a brake lever to stop the drive unit 5.

[0035] As described above, the operator holds the front handle 231 and the rear handle 232 to lift the chainsaw 1, rotating the saw chain 32 to work on objects such as trees. In the chainsaw 1, the working part 3 side, where the work is performed, is defined as the front, and the main body 2 side, held by the operator, is defined as the rear. The directions indicating the front and rear are defined as the front-back direction. Furthermore, the left and right directions when viewing the front from the rear are defined as the left-right direction.

[0036] Figure 3 This is a diagram showing the chainsaw 1 as viewed from the front. (Example) Figure 3 As shown, the front handle 231 includes a first handle portion 2311 and a second handle portion 2312. The first handle portion 2311 is disposed separately from the housing 21 in the upper direction, and the second handle portion 2312 is disposed separately from the housing 21 in the left direction. The operator alternately grips the first handle portion 2311 and the second handle portion 2312 when cutting the work object longitudinally and transversely.

[0037] When cutting the workpiece longitudinally, the operator holds the first handle 2311 with one hand and the rear handle 232 with the other hand to operate the operation receiving part 42, thereby rotating the saw chain 32 longitudinally. Conversely, when cutting the workpiece transversely, the operator holds the second handle 2312 with one hand and the rear handle 232 with the other hand, maintaining the chainsaw 1 at a transverse tilt, and rotates the saw chain 32 transversely by operating the operation receiving part 42.

[0038] Figure 4 This is a diagram showing the chainsaw 1 as viewed from above. Figure 4 In the diagram, the center line A1, representing the center of the rear handle 232 in the left-right direction, is shown by a double-dotted line. The suction unit 22 is located on the left-facing side of the housing 21. This side is the left end of the housing 21 and is positioned to the left of the center of the rear handle 232 in the main body 2, relative to the center (center line A1) in the left-right direction. That is, the suction unit 22 is located to the left of the center of the rear handle 232 in the left-right direction. On the other hand, the working unit 3 is located to the right of the center of the rear handle 232 in the left-right direction.

[0039] Figure 5 This is a diagram showing the chainsaw 1 viewed from below. Figure 5The center line A1, representing the center of the rear handle 232 in the left-right direction, is also shown by a double-dotted line. As described above, the working part 3 is located to the right of the center of the rear handle 232 in the left-right direction. More specifically, the saw chain 32 and guide rod 31 of the working part 3 are located to the right of the center of the rear handle 232 in the left-right direction. On the other hand, the air intake 221 of the air intake part 22 is located to the left of the center of the rear handle 232 in the left-right direction, just like the air intake part 22.

[0040] Alternatively, the working section 3 can be positioned to the left of the center line A1, in which case the air intake 221 is positioned to the right of the center line A1. In short, the working section 3 can be positioned to the right or left of the center of the rear handle 232 in the left-right direction, and the air intake 221 can be positioned to the opposite side of the center of the rear handle 232 in the left-right direction. According to this arrangement, compared to the case where both the working section 3 and the air intake 221 are positioned to the right or left, it is more difficult for foreign objects such as chips to be sucked into the air intake 221.

[0041] The housing 21 includes a downward-opening exhaust port 212. The exhaust port 212 is an outlet for cooling air that is taken in from the intake port 221 and discharged to the outside via the ventilation passage 20 formed inside the housing 21 to cool the heat-generating components such as the motor in the drive unit 5 located inside the main body 2.

[0042] Furthermore, the exhaust port 212 is located between the working section 3 and the intake port 221. In this manner, the air discharged from the exhaust port 212 can be used to keep foreign objects such as chips generated during operation away from the intake port 221, thus suppressing their flow into the intake port 221. Furthermore, by setting the exhaust direction of the air discharged from the exhaust port 212 to a left-right direction from the exhaust port 212 towards the working section 3... Figure 5 The direction of the component to the right (in the middle) allows foreign objects such as chips to be pushed back to the working part 3 through the exhaust, making it more difficult for these foreign objects to enter the intake port 221.

[0043] Figure 6 yes Figure 3 The view shown is AA. Figure 6 As shown, the housing 21 of the main body 2 has a storage space 211 for accommodating the drive unit 5. The main body 2 is formed from... Figure 5 The air intake 221 shown leads to the exhaust port 212 via a ventilation passage 20 through the storage space 211. A ventilation passage 20 is provided on the ventilation passage 20. Figure 1 The air supply section 6 is shown. The air supply section 6 generates an airflow (also called cooling air) toward the exhaust port 212 in the ventilation passage 20. Hereinafter, the shape from the air intake 221 of the ventilation passage 20 to the storage space 211 will be described with reference to the following figures.

[0044] Figure 7 This diagram shows the chainsaw 1 viewed from the rear. As described above, the suction unit 22 includes a fixing part 222-1 at the front and a fixing part 222-2 at the rear for fixing the suction unit 22 to the housing 21. The suction unit 22 is fixed to the left side 213 of the housing 21 by screwing screws or the like into these fixing parts 222.

[0045] Figure 8 yes Figure 5 The BB view shown. A ventilation path 20 is formed in the intake section 22 before the intake port 221. (Refer to the following...) Figure 9 Detailed explanation of ventilation path 20.

[0046] Figure 9 It is an enlarged representation Figure 8 The diagram shows ventilation path 20. Figure 9 In the diagram, for ease of understanding, ventilation path 20 is shown in shaded form. Ventilation path 20 includes an air intake 221, a first passage 223, a throttling portion 226, a second passage 224, and a third passage 225, which are connected in this order from the air intake 221 to the depth therein. Figure 6 The storage space 211 shown is connected to the depth of the third passage 225.

[0047] In the horizontally positioned state, the air intake 221 of the intake section 22 opens in a direction having a vertically downward component. More specifically, when the boundary between the internal space and the external space 9 of the intake section 22 is an opening surface, the orientation of the air intake 221 is represented by the normal to the external space 9 side of that opening surface. If the opening surface is a plane, the orientation of the normal is also consistent, and the direction of the normal becomes the orientation of the air intake 221.

[0048] Furthermore, the opening surface may sometimes be formed by comprising two or more planes or curved surfaces, in which case the orientation of the normals may be two or more. Even in this case, the suction port 221 can be formed as long as the two or more normals representing the orientation of the suction port 221 have a vertically downward component. Additionally, the suction port 221 may have a vertically downward component of a vector synthesized from unit vectors representing two or more normals. In this way, compared to the case where the suction port 221 is horizontally positioned, for example, opening in the horizontal direction, it is more difficult for foreign objects such as chips to be sucked into the suction port 221.

[0049] In the horizontal configuration, the first passage 223 extends from the intake port 221 in a first direction D1 that includes a vertical upward component. The second passage 224 connects to the first passage 223 and extends in a second direction D2 at a predetermined angle to the first direction D1. The angle between the two directions refers to the angle formed by the vectors representing the two directions when their origins are aligned. In this embodiment, the first direction D1 is upward, and the second direction D2 is to the right. Therefore, the predetermined angle between the first direction D1 and the second direction D2 is 90 degrees.

[0050] If the orientation during operation is close to horizontal, even if a foreign object enters the intake 221, it must rise further in the first passage 223, thus rarely entering deep into the passage. However, depending on the operating conditions, sometimes the chainsaw 1 tilts, reducing the slope of the first passage 223, making it easier for foreign objects to enter deep into the passage. Even in this case, if the second direction D2 is close to upward, it is difficult for foreign objects to enter deep into the second passage 224. Thus, according to this embodiment, when the orientation of the chainsaw 1 changes during operation, it is possible to prevent foreign objects from entering deep into the ventilation passage 20.

[0051] Furthermore, the predetermined angle formed by the first direction D1 and the second direction D2 can be less than 90 degrees or greater than 90 degrees. However, if the predetermined angle is too small, foreign objects entering the first passage 223 can easily enter the second passage 224 directly. Conversely, if the predetermined angle is too large, the resistance used to generate airflow in the ventilation passage 20 increases, and the power consumption of the air supply unit 6 increases. Therefore, the predetermined angle is preferably around 90 degrees.

[0052] The third passage 225 connects to the second passage 224 and extends along a third direction D3 at a predetermined angle to the first direction D1 and the second direction D2, respectively. In this embodiment, the third direction D3 is a forward direction. Therefore, the angles formed by the first direction D1 and the second direction D2 with the third direction D3 are both 90 degrees. Thus, similar to the case of the second passage 224, when the direction of the chainsaw 1 changes during operation, it is difficult for foreign objects to enter the depths of the ventilation passage 20.

[0053] Furthermore, the throttling section 226 is provided on the ventilation passage 20 and is the portion with a reduced cross-sectional area compared to the preceding and following ventilation passages 20. In this embodiment, the throttling section 226 is located between the first passage 223 and the second passage 224, and its cross-sectional area is reduced compared to the preceding and following ventilation passages 20 (first passage 223 and second passage 224). In this manner, foreign objects entering from the intake port 221 are easily trapped by the throttling section 226, thus making it difficult for foreign objects to enter further through the throttling section 226.

[0054] <Other Implementation Methods>

[0055] In this embodiment, a chainsaw is described as an example of a power-operated machine, but it is not limited to this. For example, it could also be a hedge trimmer or a motorized cutter. Furthermore, while the chainsaw is an electric power-operated machine with a motor in its drive unit 5, it could also be a power-operated machine with an internal combustion engine in its drive unit 5. In short, any power-operated machine can be used as long as it has a drive unit that requires cooling inside its main body.

[0056] In this embodiment, a throttling section 226 is provided on the ventilation path 20. However, a filter may also be provided in addition to or in place of the throttling section 226. In this case, it is also possible to prevent foreign objects from entering through the filter first. Alternatively, the filter may be provided on the throttling section 226. In this case, since the cross-sectional area of ​​the filter installation location is smaller than that of other parts, the air resistance caused by the filter is smaller than when the filter is installed in other parts, which can suppress the energy consumption of the air supply section 6.

[0057] The filter can be disposed in the first passage 223, the second passage 224, or the third passage 225. Alternatively, the filter can be disposed in the ventilation passage 20 inside the housing 21. However, ideally, the filter is disposed in the intake section 22. Although the intake section 22 is part of the main body 2, it is detachable from the housing 21. The intake section 22 forms at least a ventilation passage 20 from the intake port 221 to the filter, which makes filter replacement easier compared to the case where the filter is disposed inside the housing 21.

[0058] Furthermore, the shape of the ventilation path 20 is not limited to the shape described in the embodiment. For example, in the embodiment, the second direction D2 of the second passage 224 extends to the right, but the second direction D2 can also be to the left. Additionally, the third direction D3 of the third passage 225 extends forward, but the third direction D3 can also be backward. In any case, when the direction of the chainsaw 1 changes during operation and the slope of the first passage 223 decreases, the other passages become sloped upwards, thereby easily suppressing the intrusion of foreign objects.

[0059] Alternatively, a fourth passage extending in the opposite direction (left) can be provided after the second passage 224 extending in the second direction (D2) to the right. Thus, regardless of which direction the chainsaw 1 tilts (left or right), either the second passage 224 or the fourth passage can form an upward slope, thereby further suppressing the intrusion of foreign objects.

[0060] Furthermore, the handle portion 23 is configured to align with the orientation of the chainsaw 1 for gripping. Here, a ventilation path 20 can be formed in conjunction with the configuration of the handle portion 23. For example, as shown in the embodiment, the chainsaw 1 includes a first handle portion 2311 and a second handle portion 2312.

[0061] As described above, the state in which the first handle portion 2311 is held by the operator and the chainsaw 32 is in a longitudinally rotating state, hereinafter referred to as the "longitudinal rotation state". More specifically, the longitudinal rotation state refers to the state in which the chainsaw 1 is held when only the first handle portion 2311 is supported. The chainsaw 1 is designed to be nearly horizontal in the front-to-back direction when only the first handle portion 2311 is supported, so that it is easy for the operator to operate. However, it is not limited to being completely horizontal; for example, there are cases where it is slightly upward in front and rises forward. Therefore, the longitudinal rotation state may be consistent with the horizontal setting state described in the embodiment, or it may not be consistent with it.

[0062] On the other hand, the state in which the second handle portion 2312 is held by the operator and the chain saw 32 is in a laterally rotating state, as described above, hereinafter referred to as the "lateral rotation state". More specifically, the lateral rotation state refers to the state in which the chainsaw 1 is held when only the second handle portion 2312 is supported. The longitudinal rotation state is an example of the "first holding state" of the present invention, and the lateral rotation state is an example of the "second holding state" of the present invention.

[0063] The first passage 223 can be configured to extend from the intake port 221 in a second direction including a vertical component in a longitudinal rotation state (first gripping state), and the second passage 224 can be configured to extend upward in a third direction including a vertical component in a lateral rotation state (second gripping state). When the longitudinal rotation state is consistent with the horizontal setting state, the second direction is consistent with the first direction.

[0064] In this way, regardless of whether the first handle portion 2311 or the second handle portion 2312 is held, foreign objects entering the ventilation passage can be easily prevented from entering deep into the passage. Furthermore, regarding the "direction including the vertical upward component," it simply needs to be slightly oriented towards the vertical upward direction. The closer this direction is to the vertical upward direction (the angle with the horizontal plane is 90 degrees), the easier it is to prevent foreign objects from intruding deep into the ventilation passage.

[0065] <Appendix>

[0066] Furthermore, the present invention can also be provided in various other ways.

[0067] (2) In the power work machine, the main body has a rear handle, the work part is located to the right or left of the center in the left-right direction of the rear handle, and the air inlet is located to the opposite side of the work part from the center.

[0068] This method prevents foreign objects from being sucked in through the air intake.

[0069] (3) In the power work machine, the ventilation path has a first passage and a second passage. In the first state, the first passage extends from the air intake in a first direction including a vertical upward component. The second passage is connected to the first passage and extends in a second direction at a predetermined angle to the first direction.

[0070] In this way, even if the direction of the power machine changes during operation, foreign objects will have difficulty entering the depths of the ventilation path.

[0071] (4) In the power work machine, the main body has a first handle part and a second handle part. The first passage extends from the air inlet in a direction including a vertically upward component in a first holding state in which the first handle part is held by the operator to perform work. The second passage extends in a direction including a vertically upward component in a second holding state in which the second handle part is held by the operator to perform work.

[0072] In this way, regardless of which handle you hold, you can easily prevent foreign objects from entering the ventilation duct and going deeper.

[0073] (5) In the power work machine, the main body has a throttling section in the ventilation path with a reduced cross-sectional area compared to the front and rear.

[0074] This method makes it difficult for foreign objects to enter from the throttling section.

[0075] (6) The power work machine is equipped with a filter provided in the throttling section.

[0076] In this way, energy consumption in the air supply section can be suppressed compared to installing filters in other parts.

[0077] (7) In the power work machine, a portion of the main body is detachable, and the portion forms at least the ventilation path from the air intake to the filter.

[0078] This method makes filter replacement much easier.

[0079] Of course, it's not limited to the above aspects.

[0080] Furthermore, the above-described embodiments and variations can be implemented in any combination.

[0081] Finally, although various embodiments of the present invention have been described, these embodiments are merely illustrative and are not intended to limit the scope of the invention. The present invention can also be implemented through various other embodiments, and any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention. Related embodiments or variations should not only be included within the scope or spirit of the present invention, but also within the scope of the invention as described in the claims and their equivalents.

[0082] Symbol Explanation

[0083] 1: Chainsaw

[0084] 2: Main body

[0085] 3: Operations Department

[0086] 4: Control Department

[0087] 5: Drive Unit

[0088] 6: Air Supply Department

[0089] 7: Battery

[0090] 9: External Space

[0091] 20: Ventilation path

[0092] 21: Shell

[0093] 22: Inhalation section

[0094] 23: Handle part

[0095] 24: Bottom surface

[0096] 31: Guide rod

[0097] 32: Saw Chain

[0098] 42: Operation Receiving Unit

[0099] 43: Rod

[0100] 211: Storage Space

[0101] 212: Exhaust port

[0102] 213: Left side

[0103] 221: Intake port

[0104] 222: Fixing part

[0105] 222-1: Fixing part

[0106] 222-2: Fixing part

[0107] 223: First Pathway

[0108] 224: Second Pathway

[0109] 225: Third Pathway

[0110] 226: Throttling section

[0111] 231: Front handle

[0112] 232: Rear Handle

[0113] 233: Handguard Components

[0114] 2311: First handle section

[0115] 2312: Second handle part

Claims

1. A power-operated machine, characterized in that, have: Operations Department, Drive Department, Main Body Department, and Air Supply Department; The work unit acts on the work object; The drive unit drives the operating unit; The main body has a bottom part, an air inlet and an exhaust outlet, and forms a storage space for accommodating the drive unit and a ventilation path from the air inlet through the storage space to the exhaust outlet; The air supply unit generates an airflow toward the exhaust port in the ventilation path; In the first state where the power work machine is positioned with its bottom surface facing a horizontal plane, the air intake opens in a direction with a vertical downward component. The ventilation path has a first passage and a second passage. In the first state, the end of the first passage located at the vertically lower end becomes the air intake, and in the first state, the first passage extends from the air intake in a first direction including a vertically upward component. The end of the first passage located at the vertically upper end in the first state is connected to the second passage, and the second passage extends in a second direction at a predetermined angle to the first direction. The main body has a throttling section with a reduced cross-sectional area between the first and second passages of the ventilation path compared to the front and rear passages. The power work machine includes a filter installed in the throttling section.

2. The power work machine as described in claim 1, characterized in that, A portion of the main body is detachable, and the portion at least forms the ventilation path from the air intake to the filter.

3. The power work machine as described in claim 1, characterized in that, The ventilation path also has a third passage. The third path connects to the downstream end of the second path and extends upward in the third direction, wherein the third direction forms a predetermined angle with both the first and second directions. The air supply unit is located inside the storage space deep within the third passage. Air that has passed through the first passage, the second passage, and the third passage reaches the air supply unit.

4. The power work machine as described in any one of claims 1 to 3, characterized in that, The main body has a rear handle. The working part is located to the right or left of the center of the rear handle in the left-right direction. The air intake is located on the side opposite to the working part, which is closer to the center.

5. The power work machine as described in claim 4, characterized in that, The main body has a first handle portion and a second handle portion. In the first gripping state, where the first handle is held by the operator for operation, the first passage extends from the air inlet in a direction including a vertically upward component. The second passage extends in a direction including a vertically upward component in a second gripping state in which the second handle is held by the operator for operation.

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