Electric work machine

Abstract

This utility model provides an electric work machine configured to prevent rainwater from contacting the connection terminals electrically connected to the battery while minimizing the accumulation of heat generated by the battery. According to one aspect of this utility model, an electric work machine is provided, comprising an electric working unit and a main body. The electric working unit is located at the front of the main body and is configured to operate using power supplied from a battery. The main body includes a battery storage section, which forms an upwardly open gap with the battery when it is inserted from above, and a cover installed on the battery storage section to cover the battery from above. The cover is configured to expose the gap to the outside when installed on the battery storage section.

Description

Technical Field

[0001] This utility model relates to an electric work machine. Background Technology

[0002] Patent document 1 discloses a chainsaw.

[0003] The chainsaw has a motor, a housing containing the motor, a battery pack detachably mounted in the housing and electrically connected to the motor, and a cover connected to the housing and capable of being opened and closed to cover the battery pack.

[0004] In this chainsaw, the casing is sealed when the battery pack is covered with a cap.

[0005] Therefore, although it can prevent rainwater and other substances from contacting the connection terminals that are electrically connected to the battery pack, there is a risk that the heat generated by the battery pack will accumulate inside the casing, causing the battery pack to shut down for safety reasons.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Publication No. 2022-21558 Utility Model Content

[0009] The problem to be solved by utility models

[0010] In view of the above, the present invention provides an electric work machine that is configured to prevent rainwater and other substances from contacting the connection terminals that are electrically connected to the battery while minimizing the accumulation of heat generated by the battery.

[0011] Methods for solving problems

[0012] According to one aspect of the present invention, an electric work machine is provided, which includes an electric work unit and a main body; the electric work unit is disposed on the front side of the main body and is configured to operate by power supplied from a battery; the main body has: a battery storage unit that forms an upwardly open gap with the battery when the battery is inserted from above, and a cover that is installed on the battery storage unit to cover the battery from above; the cover is configured to expose the gap to the outside when it is installed on the battery storage unit.

[0013] This method prevents rainwater from contacting the connection terminals while minimizing the accumulation of heat generated by the battery. Attached Figure Description

[0014] Figure 1 This is a left-side view showing the overall structure of the chainsaw.

[0015] Figure 2This is a diagram showing the chainsaw viewed from above.

[0016] Figure 3 This is a diagram showing the chainsaw viewed from below.

[0017] Figure 4 It is an enlarged representation Figure 2 A partial view of the cross section along line AA in the middle.

[0018] Figure 5A and Figure 5B This is a diagram showing other structural examples of the cover.

[0019] Figure 6A and Figure 6B This is a diagram showing other structural examples of the cover.

[0020] Explanation of reference numerals in the attached figures

[0021] 1: Chainsaw; 2: Main body; 21: Bottom surface; 22: Battery storage; 220: Storage space; 221: First opening; 222: Second opening; 223: Gap; 23: Rear handle; 24: Anti-slip part; 25: Exhaust port; 27: Connecting terminal; 28: Top; 29: Cover; 291: Cover body; 292: Foot; 292a: Rotating shaft; 3: Electric operating part; 31: Guide plate; 32: Saw chain; 33: Operating lever; 4: Suction part; 41: Suction port; 5: Handle part; 51: Front handle; 52: Front hand guard; 6: Battery; 61: Upper end; 62: Lower end; W: Water; H: Heat; O: Rotation center. Detailed Implementation

[0022] The following describes the implementation method of the electric work machine with reference to the accompanying drawings.

[0023] The various features shown in the following embodiments can be combined with each other.

[0024] The following explanation uses a chainsaw, used for cutting trees or planks, as an example to illustrate the power work machine.

[0025] Figure 1 This is a left-side view showing the overall structure of the chainsaw.

[0026] This specification defines the up-down, front-back, and left-right directions, as shown in the figure.

[0027] Specifically, the vertical direction of the chainsaw 1 when placed on a flat and horizontal setting surface is defined as the up-down direction.

[0028] In addition, the direction orthogonal to the up and down direction is defined as the front and back direction, and the direction orthogonal to both the up and down and front and back directions is defined as the left and right direction.

[0029] The chainsaw 1 has a main body 2, an electric operating part 3, an air suction part 4, a handle part 5, and a battery 6.

[0030] The electric working unit 3 is located on the front side of the main body 2 and is configured to operate by power supplied from the battery 6 when the operator uses the chainsaw 1 for work.

[0031] Through this action, the electric working unit 3 directly acts on the work object.

[0032] Here, the operator performs tasks such as cutting trees or planks.

[0033] The electric operating unit 3 includes a guide plate 31, a saw chain 32, and an operating lever 33.

[0034] The guide plate 31 is a plate-shaped component that extends in the front-back direction, and its rear end is installed on the main body 2.

[0035] A ring-shaped saw chain 32 is wound around the outer periphery of the guide plate 31.

[0036] Although not in Figure 1 As shown in the figure, the main body 2 houses the control board, drive gears, motor, etc.

[0037] The saw chain 32 engages with the drive gear.

[0038] The drive gear is rotated by a motor.

[0039] The control board performs control processing to control the rotation of the motor by operating the joystick 33.

[0040] With the above structure, when the operator operates the operating lever 33, the motor controlled by the control board causes the drive gear to rotate, and through this rotational power, the saw chain 32 rotates along the outer periphery of the guide plate 31.

[0041] The main body 2 is made of resin material or the like and is a housing (also called a "shell") that houses the aforementioned motor or the like.

[0042] The main body 2 has a bottom part 21, a battery storage part 22, and a rear handle 23.

[0043] The bottom surface 21 is the part that contacts the setting surface when the chainsaw 1 is placed on a flat setting surface.

[0044] In this embodiment, the bottom surface 21 includes a flat surface that contacts the setting surface, but it can also be a shape that contacts the setting surface through multiple edges or multiple points, as long as the chainsaw 1 can be stable when placed on the setting surface.

[0045] Battery 6 is inserted from the top and installed into battery storage section 22.

[0046] The rear handle 23 is located on the rear side of the main body 2 and is the part that the operator holds when performing electric operations.

[0047] The rear handle 23 is a long, thin rod-shaped part that is sized to be easy for the operator to hold.

[0048] The intake section 4 has an intake port 41 and forms a passage for sending the air drawn in from the intake port 41 as cooling air into the interior of the main body section 2.

[0049] The handle portion 5 has a front handle 51 and a front hand guard 52.

[0050] The front handle 51 is located on the front side of the main body 2 and is the part that the operator holds when performing electric operations.

[0051] The front handle 51 is located on the upper side to the left side of the main body 2 and is used to switch the grip method when cutting the work object in the longitudinal direction and in the transverse direction.

[0052] The front hand guard 52 is a part that protects the hand holding the front handle 51 from injury, and also functions as a brake to stop the operation of the electric working unit 3.

[0053] As described above, the chainsaw 1 is carried by the operator holding the front handle 51 and the rear handle 23, and works on objects such as trees by rotating the saw chain 32.

[0054] In chainsaw 1, the side of the saw chain 32 that performs the work is defined as the front side, the side of the rear handle 23 held by the operator is defined as the rear side, and the direction indicating the front and rear sides is defined as the front-back direction.

[0055] In addition, the left and right directions when viewing the front from the rear are defined as left and right directions.

[0056] Battery 6 has a long and slender shape.

[0057] The battery 6 is inserted into the storage space 220 of the battery storage section 22 from the top, with its length direction as the insertion direction.

[0058] Hereinafter, when the battery 6 is inserted into the battery storage section 22, the upper end is also referred to as the upper end 61, and the lower end is also referred to as the lower end 62.

[0059] On the other hand, battery 6 is removed upwards in the removal direction opposite to the insertion direction.

[0060] The battery storage section 22 has a storage space 220 into which the battery 6 can be inserted from the top, and the battery 6 inserted into the storage space 220 can be detachably held.

[0061] The storage space 220 has: a first opening 221 on the upper side through which the battery 6 passes when inserted; and a second opening 222 on the opposite side (lower side) of the first opening 221.

[0062] The second opening 222 is sized to allow the operator's fingers to pass through.

[0063] According to this embodiment, by inserting a finger into the second opening 222 and pressing the lower end 62 of the battery 6, a force can be applied to the battery 6 in the removal direction (upper side), so the battery 6 can be removed more easily compared to the case where the second opening 222 is not provided.

[0064] Furthermore, for example, it is easier to provide a second opening 222 than to provide a removal mechanism with a spring member and an operating lever, so the battery can be removed more easily with a simpler structure in this chainsaw 1.

[0065] The first opening 221 is the location where the storage space 220 is open to the outside from the upper end 61 of the battery 6.

[0066] The second opening 222 is the location where the storage space 220 is open to the outside from the lower end 62 of the battery 6.

[0067] In other words, when the battery storage section 22 of the main body 2 is placed with the bottom part 21 facing down, the second opening 222 is located at a lower position than the first opening 221.

[0068] According to this implementation, the battery 6 can be inserted into the storage space 220 due to its own weight, so the battery 6 can be inserted more easily compared to the case where the positional relationship of the first opening 221 and the second opening 222 is reversed.

[0069] like Figure 2 As shown, the main body 2 has an anti-slip part 24 on the rear side of the first opening 221 (battery storage part 22).

[0070] The anti-slip part 24 is formed by multiple ribs extending in the left and right directions respectively.

[0071] The anti-slip part 24 is the position where the operator's thumb contacts when holding the handle 23, and also the position where the operator's fingers contact when removing the battery 6, and is used to prevent the fingers from slipping.

[0072] Note that the anti-slip part 24 is not limited to multiple ribs; for example, it can also be multiple protrusions, multiple depressions, or a surface that has been processed into a file shape, such as a mesh or ripple.

[0073] In addition, such as Figure 3 As shown, the main body 2 has an exhaust port 25 on the front side of the second opening 222.

[0074] The exhaust port 25 draws in air (cooling air) from the intake port 41 and cools the heat-generating components such as the motor and control board installed inside the main body 2, and then discharges it to the outside.

[0075] As described above, the battery storage section 22 has a second opening 222 on the lower end 62 side of the battery 6.

[0076] Here, the length (dimension) of the battery 6 in the left-right direction is greater than the length (dimension) of the second opening 222 in the left-right direction.

[0077] In other words, a portion of the lower end 62 of the battery 6 is covered by the bottom surface 21.

[0078] In this way, the shape and size of the second opening 222 are configured such that the battery 6 inserted into the storage space 220 is blocked from passing through by the bottom surface 21, etc.

[0079] According to this embodiment, it is easier to ensure the strength of the main body 2 compared to the case where the second opening 222 is configured in the same shape and size as the first opening 221 so that the battery 6 can pass through.

[0080] In addition, the exhaust port 25 is located between the electric operating unit 3 and the second opening 222.

[0081] According to this implementation, the air discharged from the exhaust port 25 can prevent foreign objects such as chips generated during operation from easily entering the storage space 220.

[0082] Furthermore, by setting the exhaust direction of the air discharged from the exhaust port 25 to the side where the electric operating unit 3 is located in the left-right direction ( Figure 3 (The bottom side of the compartment) makes it less likely for foreign objects such as chips to enter the storage space 220.

[0083] like Figure 4 As shown, when the battery storage section 22 is inserted (stored) into the storage space 220, a gap 223 is formed between the battery storage section 22 and the battery 6.

[0084] The gap 223 opens to the upper side of the battery storage section 22 at the first opening 221, and also opens to the lower side of the battery storage section at the second opening 222.

[0085] In other words, even when the battery 6 is stored in the storage space 220, the gap 223 still extends vertically through the main body 2 (battery storage part 22).

[0086] In addition, such as Figure 1 and Figure 4 As shown, the main body 2 has a cover 29, which is installed on the battery storage part 22 to cover the battery 6 from the top.

[0087] When the cover 29 is installed in the battery storage section 22, it covers the upper end 61 side of the battery 6, but does not cover the upper side of the gap 223, and is configured to expose the gap 223 to the outside.

[0088] With this structure, rainwater and other water W are discharged to the outside from the lower side of the battery storage section 22 through the gap 223, thus effectively preventing adverse effects (such as leakage, corrosion, etc.) on electrical components such as the battery 6.

[0089] In addition, the heat H generated by the battery 6 will not accumulate in the battery storage section 22, but will be discharged from the top to the outside, thus effectively preventing the battery 6 from malfunctioning.

[0090] In addition, the cover 29 is rotatably mounted relative to the battery storage section 22.

[0091] With this structure, it is relatively easy to install and remove the battery 6 relative to the battery storage section 22.

[0092] The cover 29 has a cover body 291 that covers the battery 6, and a foot 292 that is connected to the cover body 291 and fixed to the battery storage part 22.

[0093] In this embodiment, such as Figure 1 As shown, the lower end of the foot 292 is rotatably mounted to the main body 2 (battery storage part 22) at the rotation axis 292a.

[0094] Thus, the cover 29 is configured to rotate between a first position covering the battery 6 and a second position rotating forward to expose the battery 6 to the outside.

[0095] With this structure, since the cover body 291 of the cover 29 in the first position can cover the battery 6 and the electrical components below it, the adverse effects of water W on the electrical components can be better prevented.

[0096] In this embodiment, the battery storage section 22 has a connection terminal 27 that is electrically connected to the battery 6 on the front side of the gap 223.

[0097] This structure makes it particularly easy to protect the connection terminals 27, which are susceptible to adverse effects from water.

[0098] In addition, such as Figure 1 As shown, the cover body 291 of the cover 29 in the first position covers the top 28 of the main body 2 (the front boundary between the battery storage part 22 and the battery 6), thus more effectively preventing water W from contacting the connection terminal 27.

[0099] Furthermore, such as Figure 4As shown, the rotation center O of the cover 29 is located between the connecting terminal 27 and the gap 223 in the front-back direction.

[0100] With this structure, even when the cover 29 rotates from the first position to the second position, it is easy to prevent water W from entering the front boundary of the battery storage section 22 and the battery 6.

[0101] Furthermore, the cover 29 is positioned such that its front end is located in front of the edge of the battery storage section 22 (top 28 of the main body 2) on the side of the connection terminal 27.

[0102] With this structure, since the rotation center O of the cover 29 is located on the side of the connection terminal 27, even if water attached to the cover 29 flows to the front of the main body 2 due to the rotation of the cover 29, it can prevent or suppress its intrusion between the battery 6 and the battery storage part 22.

[0103] Cover 29 can also be used Figure 5A and Figure 5B as well as Figure 6A and Figure 6B The structure shown.

[0104] Figure 5A and Figure 5B as well as Figure 6A and Figure 6B These are diagrams illustrating other structural examples of the cover.

[0105] Figure 5A and Figure 5B The cover 29 shown is configured to be installed onto the battery storage section 22 by sliding in the vertical direction.

[0106] Figure 6A and Figure 6B The cover 29 shown has a rotating shaft 292a at a position corresponding to the gap 223 between it and the battery storage part 22.

[0107] Furthermore, the cover 29 is configured to rotate between a first position covering the battery 6 and a second position rotating rearward to expose the battery 6 to the outside.

[0108] In the embodiments described above, although a chainsaw was used as an example to illustrate the electric work machine, the electric work machine is not limited to this.

[0109] Electric work machines can also include hedge trimmers, power cutters, blowers, etc.

[0110] In other words, any electric work machine can be made as long as a battery is installed in the battery storage section of the main body and an electric working section is provided that uses the power supplied from the battery to operate.

[0111] In addition, it can also be provided through the various methods described below.

[0112] (1) An electric work machine, comprising: an electric work unit and a main body; the electric work unit is disposed on the front side of the main body and configured to be driven by power supplied from a battery; the main body has: a battery storage section that forms an upwardly open gap with the battery when the battery is inserted from above, and a cover that is installed on the battery storage section to cover the battery from above; the cover is configured to expose the gap to the outside when it is installed on the battery storage section.

[0113] (2) The electric work machine as described in (1) above, wherein the cover is rotatably mounted on the battery storage section.

[0114] (3) The electric work machine as described in (2) above, wherein the cover is configured to rotate between a first position covering the battery and a second position rotating forward to expose the battery to the outside.

[0115] (4) The electric work machine as described in any one of (1) to (3) above, wherein the gap is also open to the lower side of the battery storage section.

[0116] (5) The electric work machine as described in any one of (1) to (4) above, wherein the battery storage part has a connection terminal electrically connected to the battery on the front side of the gap.

[0117] (6) The electric work machine as described in (5) above, wherein the cover is rotatably mounted on the battery storage part, and its rotation center is located between the connecting terminal and the gap in the front-rear direction.

[0118] (7) The electric work machine as described in any one of (1) to (6) above, wherein the cover has a cover body covering the battery and a foot connected to the cover body and fixed to the battery storage portion.

[0119] Of course, it's not limited to this.

[0120] Finally, although various embodiments related to this utility model have been described, these are merely examples and are not intended to limit the scope of the utility model.

[0121] The new implementation method can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the utility model.

[0122] The embodiments and their variations are included within the scope and spirit of the utility model, as well as within the scope of the utility model and its equivalents as described in the claims.

Claims

1. An electric power tool, characterized by comprising: include: Electric operation unit and main body; The electric operating unit is located on the front side of the main body and is configured to operate using power supplied from the battery. The main body portion has: The battery storage section, when the battery is inserted from above, forms an upwardly open gap with the battery, and A cover is installed on the battery storage section to cover the battery from above; The cover is configured such that, when installed on the battery storage section, the gap is exposed to the outside.

2. The electric work machine according to claim 1, wherein, The cover is rotatably mounted on the battery storage compartment.

3. The electric work machine according to claim 2, wherein, The cover is configured to rotate between a first position covering the battery and a second position rotating forward to expose the battery to the outside.

4. The electric work machine according to claim 1, wherein, The gap also opens to the lower side of the battery storage section.

5. The electric work machine according to claim 1, wherein, The battery storage section has a connection terminal on the front side of the gap that is electrically connected to the battery.

6. The electric work machine according to claim 5, wherein, The cover is rotatably mounted on the battery storage section, and its center of rotation is located between the connecting terminal and the gap in the front-to-back direction.

7. The electric work machine according to claim 1, wherein, The cover has a cover body that covers the battery and a foot that is connected to the cover body and fixed to the battery storage part.

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