Electric work machine
By designing the battery to be inserted from the top and protrude from the top of the virtual plane within the chainsaw, combined with buffer absorption space and materials, the problems of installing large-capacity batteries and dealing with drop impacts are solved, achieving both battery safety and convenience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YAMABIKO CORP
- Filing Date
- 2025-07-17
- Publication Date
- 2026-06-30
Smart Images
Figure CN224419458U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an electric work machine. Background Technology
[0002] Patent document 1 discloses a chainsaw (a battery-operated work tool).
[0003] In this chainsaw, the entire battery is positioned on the underside of a virtual plane that contacts the handle tube and the operating area.
[0004] In this type of chainsaw, even if it falls vertically downwards from the top, the battery will not directly contact the ground; the impact can be absorbed by the handle tube and the operating area.
[0005] However, it is difficult to install a large-capacity battery in this structure, i.e., a large-sized battery. Conversely, in order to install a large-capacity battery, the chainsaw as a whole must be made larger.
[0006] Existing technical documents
[0007] Patent documents
[0008] Patent Document 1: Chinese Publication No. 117356287 Utility Model Content
[0009] The problem to be solved by utility models
[0010] In view of the above, the present invention aims to provide an electric work machine that can mitigate the impact on the battery when it falls without requiring it to be large in size.
[0011] Methods for solving problems
[0012] According to one aspect of the present invention, an electric work machine is provided, including an electric work unit, a main body, a front handle, and a rear handle. 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 section for inserting and storing a battery from above; and a cover installed on the battery storage section to cover the battery stored in the battery storage section from above. The front handle is located above the main body and further forward than the battery storage section, and has a first portion extending in a cross direction that intersects the front-rear direction and the vertical direction. The rear handle is connected to the rear side of the main body and extends rearward. When a virtual plane is defined that connects to the upper region of the first portion of the front handle and the upper region of the rear handle, the battery stored in the battery storage section protrudes above the virtual plane.
[0013] This method can mitigate the impact on the battery during a drop without requiring it to be large enough. Attached Figure Description
[0014] Figure 1 This is a left-side view showing the overall structure of the chainsaw.
[0015] Figure 2 This is a diagram showing a chainsaw as viewed from above.
[0016] Figure 3 This is a diagram showing a chainsaw as viewed from below.
[0017] Figure 4 It is a diagram showing the positional relationships of the various parts of the battery.
[0018] Figure 5 It is an enlarged representation Figure 2 A partial view of the cross section along line AA in the middle.
[0019] Figure 6A and Figure 6B This is a diagram showing other structural examples of the cover.
[0020] Figure 7A and Figure 7B This is a diagram showing other structural examples of the cover.
[0021] Explanation of reference numerals in the attached figures
[0022] 1: Chainsaw; 2: Main body; 21: Bottom part; 22: Battery storage part; 220: Storage space; 221: First opening; 222: Second opening; 223: Gap; 23: Rear handle; 24: Anti-slip part; 25: Exhaust port; 27: Connection terminal; 28: Top; 29: Cover; 290: Impact absorption space; 291: Cover body; 292: Foot; 292a: Rotation 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; 511: First part; 512: Second part; 52: Front hand guard; 6: Battery; 61: Upper end; 62: Lower end; W: Water; H: Heat; O: Rotation center; IP: Virtual plane. Detailed Implementation
[0023] The implementation method of the electric work machine will be described below with reference to the accompanying drawings.
[0024] The various features shown in the following embodiments can be combined with each other.
[0025] In the following text, a chainsaw, used for cutting trees or planks, will be used as an example of an electric work machine.
[0026] Figure 1 This is a left-side view showing the overall structure of the chainsaw.
[0027] Figure 2 This is a diagram showing a chainsaw as viewed from above.
[0028] Figure 3 This is a diagram showing a chainsaw as viewed from below.
[0029] Figure 4 It is a diagram showing the positional relationships of the various parts of the battery.
[0030] Figure 5 It is an enlarged representation Figure 2 A partial view of the cross section along line AA in the middle.
[0031] This specification defines the up-down, front-back, and left-right directions, as shown in the figure.
[0032] Specifically, the vertical direction of the chainsaw 1 when placed on a flat and horizontal setting surface is defined as the up-down direction.
[0033] 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.
[0034] The chainsaw 1 includes a main body 2, an electric operating part 3, an air intake part 4, a handle part 5 including a front handle 51, a rear handle 23, and a battery 6.
[0035] 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.
[0036] Through this action, the electric working unit 3 directly acts on the work object.
[0037] Here, the operator performs tasks such as cutting trees or planks.
[0038] The electric operating unit 3 includes a guide plate 31, a saw chain 32, and an operating lever 33.
[0039] The guide plate 31 is a plate-shaped component that extends in the front-back direction, and its rear end is mounted on the main body 2.
[0040] A ring-shaped saw chain 32 is wound around the outer periphery of the guide plate 31.
[0041] Although not in Figure 1 As shown in the figure, the main body 2 houses the control board, drive gear, motor, etc.
[0042] The saw chain 32 engages with the drive gear.
[0043] The drive gear is rotated by a motor.
[0044] The control board performs control processing to control the rotation of the motor by operating the control lever 33.
[0045] According to 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.
[0046] 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.
[0047] The main body 2 has a bottom part 21 and a battery storage part 22.
[0048] The bottom surface 21 is the part that contacts the setting surface when the chainsaw 1 is placed on a flat setting surface.
[0049] In this embodiment, the bottom surface 21 includes a flat surface that contacts the mounting surface, but it can also be a shape that contacts the mounting surface through multiple edges or multiple points, as long as the chainsaw 1 is stable when placed on the mounting surface.
[0050] In the battery storage section 22, the battery 6 is inserted and installed from the top.
[0051] The rear handle 23 is connected to the rear side of the main body 2 and extends rearward.
[0052] The rear handle 23 is the part that the operator holds when performing electric operations.
[0053] The rear handle 23 is a long, thin rod-shaped part that is sized to be easy for the operator to hold.
[0054] Note that the rear handle 23 can also be considered as part of the main body 2.
[0055] 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.
[0056] The handle portion 5 has a front handle 51 and a front hand guard 52.
[0057] The front handle 51 is the part that the operator holds when performing electric operations.
[0058] like Figure 2 As shown, the front handle 51 is located on the upper side of the main body 2 and on the front side of the battery storage part 22, and has a first part 511 extending in a cross direction (generally the left-right direction) that intersects the front-back direction and the up-down direction, and a second part 512 that is continuous with the first part 511 and is provided from the upper side of the main body 2 to the left side.
[0059] According to this structure, when cutting a workpiece longitudinally or transversely, the first part 511 and the second part 512 can be held alternately.
[0060] 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.
[0061] 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.
[0062] 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.
[0063] Furthermore, the left and right directions when viewing the front from the rear are defined as left and right directions.
[0064] Battery 6 has a long and slender shape.
[0065] 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.
[0066] In the following text, when the battery 6 is inserted into the battery storage part 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.
[0067] On the other hand, battery 6 is removed upwards in the removal direction opposite to the insertion direction.
[0068] The battery storage section 22 has a storage space 220 in which the battery 6 can be inserted from the top, and the battery 6 inserted into the storage space 220 can be detachably held.
[0069] 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.
[0070] The size of the second opening 222 is set to allow the operator's fingers to pass through.
[0071] 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 in the removal direction (upper side) can be applied to the battery 6, so the battery 6 can be removed more easily compared to the case where the second opening 222 is not provided.
[0072] Furthermore, for example, it is easier to provide a second opening 222 than to provide a removal mechanism with spring components and operating levers, so the battery can be removed more easily with a simpler structure in this chainsaw 1.
[0073] 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.
[0074] 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.
[0075] That is, when the battery storage section 22 of the main body 2 is positioned with the bottom part 21 facing down, the second opening 222 is located at a position lower than the first opening 221.
[0076] According to this implementation, the battery 6 can be inserted into the storage space 220 by its own weight, so it is easier to insert the battery 6 compared to the case where the positional relationship of the first opening 221 and the second opening 222 is reversed.
[0077] like Figure 2 As shown, the main body 2 has an anti-slip part 24 provided on the rear side of the first opening 221 (battery storage part 22).
[0078] The anti-slip part 24 is formed by multiple ribs extending in the left and right directions respectively.
[0079] 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, making it less likely for the fingers to slip.
[0080] 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.
[0081] In addition, such as Figure 3 As shown, the main body 2 is provided with an exhaust port 25 on the front side of the second opening 222.
[0082] 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 located inside the main body 2, and then discharges it to the outside.
[0083] As described above, the battery storage section 22 has a second opening 222 on the lower end 62 side of the battery 6.
[0084] 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.
[0085] That is, a portion of the lower end 62 of the battery 6 is covered by the bottom surface 21.
[0086] 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.
[0087] In this way, 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.
[0088] In addition, the exhaust port 25 is located between the electric operating unit 3 and the second opening 222.
[0089] 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.
[0090] 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 lower side of the middle) can further prevent foreign objects such as chips from entering the storage space 220.
[0091] like Figure 5 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.
[0092] 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.
[0093] In other words, even when the battery 6 is stored in the storage space 220, the gap 223 extends through the top and bottom of the main body 2 (battery storage part 22).
[0094] In addition, such as Figure 1 and Figure 5 As shown, the main body 2 has a cover 29, which is installed on the battery storage section 22 to cover the battery 6 stored in the battery storage section 22 from above.
[0095] 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, thus exposing the gap 223 to the outside.
[0096] 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.
[0097] In addition, the heat H generated by the battery 6 will not accumulate inside the battery housing 22, but will be discharged to the outside from the top, thus effectively preventing the battery 6 from malfunctioning.
[0098] Furthermore, the cover 29 is configured to be rotatably mounted relative to the battery storage section 22.
[0099] With this structure, it is relatively easy to install and remove the battery 6 relative to the battery storage section 22.
[0100] like Figure 4 As shown, when a virtual plane IP is defined that connects to the upper region of the first part 511 of the front handle 51 and the upper region of the rear handle 23, the battery 6 housed in the battery storage section 22 protrudes to the upper side of the virtual plane IP.
[0101] With this structure, the length direction (insertion direction) of the battery 6 is not the front-back direction of the main body 2 but the vertical direction, and it is configured to protrude to the upper side of the virtual plane IP. Therefore, the chainsaw 1 does not need to be large in the front-back direction, and even a relatively large capacity (large size) battery 6 can be installed (mounted).
[0102] In such a chainsaw 1, as Figure 1 and Figure 2 As shown, a cover 29 is installed on the battery storage section 22 to cover the battery 6 from above.
[0103] Therefore, even if the top of the chainsaw 1 falls vertically downwards, the front handle 51 and the cover 29 will be the first to touch the ground.
[0104] Therefore, the front handle 51 and the cover 29 can absorb the impact of falling and mitigate the damage to the battery 6.
[0105] From this perspective, it is preferable to form a buffer absorption space between the cover 29, which covers the battery 6 stored in the battery storage section 22 from the top, and the battery 6, so that the battery 6 and the cover 29 do not come into contact.
[0106] Thus, by providing a buffer absorption space 290 between the cover 29 and the battery 6, the cover 29 absorbs the impact, thereby further mitigating the impact applied to the battery 6.
[0107] In this case, the material used to construct the cover 29 is preferably a rigid resin material, a metal material, etc.
[0108] Furthermore, it is preferable that an impact cushioning material is disposed between the cover 29 of the battery 6, which covers the battery 6 stored in the battery storage section 22 from the top, and at least one of the battery 6 and the battery storage section 22.
[0109] By placing an impact-absorbing material between the cover 29 and the battery storage section 22, the impact applied to the battery 6 can be further mitigated.
[0110] Examples of impact cushioning materials include blocks made of rubber, blocks made of viscoelastic foam (impact cushioning material), various hollow bodies, and various foams (sponges).
[0111] The specific locations of the impact cushioning material can be listed as follows: between the cover body 291 and the upper end 61 of the battery 6, and between the edge of the cover body 291 and the edge of the battery storage part 22, etc.
[0112] In addition, the impact cushioning material can be fixed to the cover 29 (cover body 291), or to the battery storage part 22, or neither can be fixed.
[0113] 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.
[0114] In this embodiment, such as Figure 1 As shown, the lower end of the foot 292 is rotatably mounted relative to the main body 2 (battery storage part 22) at the rotation axis 292a.
[0115] 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.
[0116] 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, water W can be better prevented from causing adverse effects on the electrical components.
[0117] 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.
[0118] This structure makes it particularly easy to protect the connection terminals 27, which are susceptible to adverse effects from water.
[0119] In addition, such as Figure 1 As shown, since the cover body 291 of the cover 29 located in the first position covers the area near the top 28 of the main body 2 (the front boundary between the battery storage part 22 and the battery 6), water W can be more effectively prevented from contacting the connection terminal 27.
[0120] Furthermore, such as Figure 5 As 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.
[0121] With this structure, even when the cover 29 is rotated from the first position to the second position, it is easy to prevent water W from entering the front boundary between the battery storage section 22 and the battery 6.
[0122] Cover 29 can also be configured as Figure 6A and Figure 6B and Figure 7A and Figure 7B The structure shown.
[0123] Figure 6A and Figure 6B and Figure 7A and Figure 7B The diagrams show other structural examples of the cover.
[0124] Figure 6A and Figure 6B The cover 29 shown is configured to be mounted on the battery storage section 22 by sliding in the vertical direction.
[0125] Figure 7A and Figure 7B The cover 29 shown has a rotating shaft 292a at a position corresponding to the gap 223 between it and the battery storage section 22.
[0126] 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.
[0127] In the embodiments described above, a chainsaw was used as an example of an electric work machine, but electric work machines are not limited to this.
[0128] Electric work machines can also include, for example, hedge trimmers, cutters, blowers, etc.
[0129] That is, any electric work machine can be used as long as a battery is installed in the battery storage section of the main body and an electric working section is equipped with an electric working section that operates by power supplied from the battery.
[0130] In addition, it can also be provided through the various methods described below.
[0131] (1) An electric work machine, comprising: an electric work unit, a main body, a front handle, and a rear handle, the electric work unit being disposed on the front side of the main body and configured to be operated by power supplied from a battery, the main body having: a battery storage portion for inserting and storing the battery from above; and a cover mounted on the battery storage portion to cover the battery stored in the battery storage portion from above, the front handle being located at a position higher than the main body and further forward than the battery storage portion, and having a first portion extending in a cross direction intersecting the front-rear direction and the vertical direction, the rear handle being connected to the rear side of the main body and extending rearward, wherein when a virtual plane is defined that connects to the upper region of the first portion of the front handle and the upper region of the rear handle, the battery stored in the battery storage portion protrudes to the upper side of the virtual plane.
[0132] (2) The electric work machine as described in (1) above, wherein a buffer absorption space is formed between the cover that covers the battery housed in the battery housing from above and the battery.
[0133] (3) The electric work machine as described in (1) or (2) above, wherein an impact-absorbing material is disposed between the cover of the battery housed in the battery housing and at least one of the battery and the battery housing.
[0134] (4) The electric work machine as described in any one of (1) to (3) above, wherein, when the battery is inserted, the battery storage part forms an upwardly open gap with the battery, and the cover, when installed on the battery storage part, is configured to expose the gap to the outside.
[0135] (5) The electric work machine as described in (4) above, wherein the cover is configured to be rotatably mounted relative to the battery storage portion.
[0136] (6) The electric work machine as described in (5) 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.
[0137] (7) The electric work machine as described in any one of (4) to (6) above, wherein the gap is also open to the lower side of the battery storage section.
[0138] (8) The electric work machine as described in any one of (4) to (7) above, wherein the battery storage section has a connection terminal electrically connected to the battery at a position further forward than the gap.
[0139] (9) The electric work machine as described in (8) above, wherein the cover is rotatably mounted relative to the battery storage portion, and its center of rotation is located in the front-rear direction between the connecting terminal and the gap.
[0140] (10) The electric work machine as described in any one of (4) to (9) 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.
[0141] Of course, it's not limited to this.
[0142] 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.
[0143] 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.
[0144] 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 operating unit, main body, front handle, and rear handle. 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 has a battery storage section that inserts and stores the battery from the top. And a cover, which is installed on the battery storage section to cover the battery stored in the battery storage section from above. The front handle is located higher than the main body and further forward than the battery storage portion, and has a first portion extending in a cross direction that intersects the front-back direction and the up-down direction. The rear handle is connected to the rear side of the main body and extends rearward. When a virtual plane is defined that connects to the upper region of the first part of the front handle and the upper region of the rear handle, the battery housed in the battery storage portion protrudes to the upper side of the virtual plane.
2. The electric work machine according to claim 1, wherein, A buffer absorption space is formed between the cover that covers the battery stored in the battery storage section from the top and the battery.
3. The electric work machine according to claim 1, wherein, An impact-absorbing material is disposed between the cover that covers the battery housed in the battery housing from above and at least one of the battery and the battery housing.
4. The electric work machine according to claim 1, wherein, When the battery is inserted, the battery storage section forms an upward-opening gap with the battery. When the cover is installed on the battery storage section, it is configured to expose the gap to the outside.
5. The electric work machine according to claim 4, wherein, The cover is configured to be rotatably mounted relative to the battery storage section.
6. The electric work machine according to claim 5, 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.
7. The electric work machine according to claim 4, wherein, The gap also opens to the lower side of the battery storage section.
8. The electric work machine according to claim 4, wherein, The battery storage section has a connection terminal that is electrically connected to the battery, located further forward than the gap.
9. The electric work machine according to claim 8, wherein, The cover is rotatably mounted relative to the battery storage section, with its center of rotation located between the connecting terminal and the gap in the front-rear direction.
10. The electric work machine according to claim 4, 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.