Electric chain saw

Abstract

The invention discloses an electric chain saw, belongs to the field of chain saws, and solves the problems of short endurance and poor use comfort of the electric chain saw in the prior art, the technical scheme for solving the problem comprises a shell, a guide rod and a chain wound on the guide rod, a driving motor used for driving the chain wound on the guide rod to rotate is arranged in the shell, and the driving motor is connected with the guide rod. A driving motor is arranged in the shell, a holding area is arranged above the shell, a first battery pack is arranged behind the holding area, a second battery pack is arranged below the holding area, the second battery pack is located behind the driving motor, and the first battery pack and the second battery pack are used for supplying power to the driving motor. The endurance of the electric chain saw is improved, and meanwhile the use comfort is improved.

Description

Technical Field

[0001] The present invention relates to the field of chain saws, and particularly to an electric chain saw. Background Art

[0002] Currently, most electric chain saws on the market are powered by detachable battery packs. For example, in invention patents CN114192883A and CN118613342A, the battery pack is often placed at the rear end of the electric chain saw. This conventional layout has significant drawbacks: when equipped with a large-capacity battery pack, due to its large volume and increased weight, the center of gravity of the electric chain saw will shift backward, seriously affecting the operation convenience, especially difficult to flexibly control during logging and pruning operations; while choosing a small battery pack, although it can reduce the weight, due to limited power, it cannot meet the normal working requirements for a long time, resulting in a significant reduction in the working hours. Summary of the Invention

[0003] The object to be achieved by the present invention is to provide an electric chain saw, which solves the problems of short battery life and poor use comfort of electric chain saws in the prior art, improves the battery life of the electric chain saw while improving the use comfort.

[0004] To achieve the above object, the present invention adopts the following technical solution: an electric chain saw, comprising a housing, a guide bar, and a chain wound around the guide bar. A drive motor for driving the chain wound around the guide bar to rotate is provided inside the housing. A holding area is provided above the housing. A first battery pack is provided behind the holding area. A second battery pack is provided below the holding area. The second battery pack is located behind the drive motor. The first battery pack and the second battery pack are used to supply power to the drive motor.

[0005] After adopting the above technical solution, the present invention has the following advantages: The first battery pack and the second battery pack are arranged by using the space behind and below the holding area on the housing, making full use of the internal and surrounding space of the electric chain saw, making the overall structure of the equipment more compact. On the premise of ensuring various functions, the overall volume and floor area of the electric chain saw are reduced, which is convenient for carrying and storing. This layout can also make the center of gravity of the electric chain saw closer to the holding position, effectively improving the overall balance of the electric chain saw, avoiding the problem of center of gravity shift caused by a single battery pack being too large or too heavy, and helping to improve the stability and flexibility during operation. When performing logging or pruning operations, whether holding horizontally or adjusting the angle of operation, the operator can more easily keep the electric chain saw stable, reduce the shaking caused by the center of gravity shift, greatly improve the accuracy and smoothness of the cutting operation, and can operate the electric chain saw more durably and comfortably. The combination of the first battery pack and the second battery pack significantly increases the power reserve compared with the traditional single-battery design, and can effectively extend the continuous working time of the electric chain saw.

[0006] Furthermore, when observed from the rear side of the shell, taking the parting line of the shell as a reference, the center of gravity of the first battery pack coincides with the parting line of the shell.

[0007] Using the above-mentioned technical solution, the parting line refers to the line where the two halves of the mold touch each other when closed and determine the shape of the part. Setting the center of gravity of the first battery pack on the parting line of the shell means that the weight of the battery pack is evenly distributed on both sides of the electric chain saw, which helps to maintain the overall balance of the electric chain saw. This can avoid the problem of the electric chain saw tilting forward and backward or left and right due to the excessive weight of the battery pack as much as possible, making the operation smoother.

[0008] Further, when observed from the rear side of the shell, with the parting line of the shell as a reference, the center of gravity of the second battery pack is located within a position range of -25 mm to 25 mm of the shell in a direction perpendicular to the parting line.

[0009] By adopting the aforementioned technical solution, keeping the center of gravity of the second battery pack within this range helps to achieve the overall balance of the electric chain saw. When the center of gravity of the battery pack deviates too much from the center line, the overall balance of the electric chain saw will be affected, which will cause the electric chain saw to become difficult to control during use. Excessive center of gravity deviation means that the operator needs to exert more force to maintain the balance of the electric chain saw, especially when used for a long time, which will cause the muscles of the hands, wrists and arms to fatigue faster.

[0010] Furthermore, when viewed from the left and right sides of the shell, the first battery pack is tilted, and an angle between a rear plane of the first battery pack and a bottom plane of the shell is α, and 110°≤α≤135°.

[0011] Through the above technical solution, by adjusting the angle of the first battery pack, the overall center of gravity distribution of the electric chain saw can be further optimized, which helps to improve the operational stability and balance of the electric chain saw and make the cutting process smoother. If the angle is less than 110°, the battery pack may be too vertical, which will cause the center of gravity of the electric chain saw to be too high when held horizontally, and it is prone to shaking and instability. When the angle is greater than 135°, the center of gravity may be too biased to one side, which is prone to shaking and instability, and may also cause the electric chain saw to appear bulky as a whole, especially when operating in a narrow space.

[0012] Furthermore, a main handle is provided above the shell, and the main handle is arranged around the shell to form the holding area. The first battery pack is arranged behind the main handle, and the bottom area of ​​the main handle and the shell are located behind the driving motor to form a storage space for accommodating the second battery pack.

[0013] Through the above technical solution, the main handle surrounds the shell to form a gripping area, which conforms to the ergonomic design. The user can grip more naturally and comfortably when operating the electric chain saw, effectively reducing the fatigue of the hands during long-term operation. The first battery pack is arranged behind the main handle. During operation, the user's hand position is relatively fixed, the position of the battery pack will not interfere with the hand operation, and its weight is distributed behind the hand, which helps to maintain a sense of balance during operation and further improves the comfort of operation. The bottom area of ​​the main handle and the shell behind the drive motor together form a space to accommodate the second battery pack, which not only avoids the increase in volume caused by opening up a separate space to place the battery pack, but also realizes the reasonable placement of the battery pack, making the structure of the entire electric chain saw more compact, realizing an increase in battery capacity within a limited space, improving space utilization efficiency, and further optimizing the center of gravity distribution of the electric chain saw, making the equipment more stable during operation and reducing shaking and deviation.

[0014] Furthermore, a first battery slot recessed into the main handle is provided at the rear of the main handle, and a second battery slot recessed into the main handle is provided at the bottom of the main handle, and the first battery pack and the second battery pack are detachable from the first battery slot and the second battery slot respectively.

[0015] Through the above technical solution, by designing the battery slot to be recessed into the main handle, the space inside the electric chain saw can be effectively utilized, so that the battery pack can fit more closely to the surface of the main handle after installation, making the electric chain saw structure more compact and avoiding the battery pack from protruding too much and affecting the grip. The detachable design greatly simplifies the battery pack replacement process, and the user can quickly replace the battery pack as needed.

[0016] Furthermore, when observed from the left and right sides of the shell, the plane where the bottom of the second battery pack is located is parallel to the outermost plane of the bottom of the shell.

[0017] Through the above technical solution, keeping the bottom plane of the second battery pack parallel to the outermost plane of the bottom of the shell helps to achieve a good balance of the electric chain saw as a whole. This can avoid the problem of center of gravity shift caused by the second battery pack being positioned too high or too low as much as possible, making the electric chain saw more stable during use and facilitating the placement of the electric chain saw.

[0018] Furthermore, when observed from the left and right sides of the shell, the plane where the bottom of the second battery pack is located is not lower than the outermost end plane of the bottom of the shell.

[0019] Through the above technical solution, the appropriately elevated position of the second battery pack helps to adjust the overall center of gravity of the electric chain saw, thereby helping to improve the operating experience of the electric chain saw.

[0020] Furthermore, when viewed from the left and right sides of the shell, the second battery pack is located in front of the first battery pack.

[0021] With the above technical solution, the second battery pack is placed in the front, which can effectively adjust the center of gravity distribution in the front and rear directions of the electric chain saw. For example, during horizontal cutting operations, this change in the center of gravity can reduce the "floating" feeling caused by the relatively light front end of the electric chain saw, making it more stable for the user to push the electric chain saw for cutting.

[0022] Further, when observed from the rear side of the housing, the first battery pack is placed vertically, and the second battery pack is placed horizontally.

[0023] With the foregoing technical solution, by placing the battery packs in different ways (horizontally and vertically), the internal space of the electric chain saw can be utilized more effectively. This layout design helps to arrange more or larger-capacity batteries within the compact housing, thereby increasing the battery capacity without affecting the overall size. The battery packs placed in different directions can help better distribute the weight, improve the balance of the electric chain saw, and also enhance the handling performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 is a schematic structural diagram of the electric chain saw of the present invention;

[0026] Figure 2 is an exploded view of the electric chain saw of the present invention;

[0027] Figure 3 is a schematic structural diagram of the electric chain saw of the present invention when observed from the rear side of the housing;

[0028] Figure 4 is a schematic structural diagram of the electric chain saw of the present invention when observed from the right side of the housing;

[0029] In the figures, 10, housing; 11, gripping area; 12, parting line; 13, first battery slot; 14, second battery slot; 15, auxiliary handle; 16, main handle; 17, accommodating space; 20, guide bar; 21, chain; 30, drive motor; 40, first battery pack; 41, second battery pack. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0031] In the description and claims of the present invention and the above-mentioned drawings, terms such as "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0032] It should be understood that in various embodiments of the present invention, regarding the magnitudes of the serial numbers of the respective processes, it does not mean the sequence of execution is prior or subsequent. The execution sequence of each process should be determined by its function and internal logic, and should not impose any limitation on the implementation process of the embodiments of the present invention.

[0033] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0034] It should be understood that in the present invention, "a plurality of" means two or more. "And / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, X and / or Y can represent: X exists alone, X and Y exist simultaneously, and Y exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. "Including X, Y, and Z" and "including X, Y, Z" mean that all of X, Y, and Z are included. "Including X, Y, or Z" means that one of X, Y, and Z is included. "Including X, Y, and / or Z" means that any one or any two or all three of X, Y, and Z are included.

[0035] The technical solution of the present invention will be described in detail below with specific embodiments. These several specific embodiments below can be combined or replaced according to the actual situation, and the same or similar concepts or processes may not be repeated in some embodiments.

[0036] As Figures 1 to 4 shown, the present invention provides an electric chain saw, which includes a housing 10, a guide bar 20, and a chain 21 wound around the guide bar 20. A drive motor 30 for driving the chain 21 wound around the guide bar 20 to rotate is provided inside the housing 10. A gripping area 11 is provided above the housing 10. A first battery pack 40 is provided behind the gripping area 11. A second battery pack 41 is provided below the gripping area 11. The second battery pack 41 is located behind the drive motor 30. The first battery pack 40 and the second battery pack 41 are used to supply power to the drive motor 30.

[0037] The first battery pack 40 and the second battery pack 41 are arranged in the space behind and below the holding area 11 on the shell 10, which makes full use of the space inside and around the electric chain saw, making the entire device structure more compact. Under the premise of ensuring various functions, the overall volume and footprint of the electric chain saw are reduced, making it convenient to carry and store. This layout can also make the center of gravity of the electric chain saw closer to the holding position, effectively improving the overall balance of the electric chain saw, avoiding the problem of center of gravity shift caused by a single battery pack being too large or too heavy, and helping to improve stability and flexibility during operation. When performing logging or pruning operations, whether holding the electric chain saw horizontally or adjusting the angle, the operator can more easily keep the electric chain saw stable, reduce the shaking caused by the center of gravity shift, greatly improve the accuracy and smoothness of the cutting operation, and can operate the electric chain saw more persistently and comfortably. Compared with the traditional single battery design, the combination of the first battery pack 40 and the second battery pack 41 significantly increases the power reserve, which can effectively extend the continuous working time of the electric chain saw.

[0038] It should be noted that the driving motor 30 is also located below the gripping area 11 , and the first battery pack 40 and the second battery pack 41 can be connected in series or in parallel to supply power to the driving motor 30 .

[0039] It should be noted that the shell 10 is also provided with an auxiliary handle 15, which is located in front of the first battery pack 40 and the second battery pack 41, providing an additional gripping point so that the operator can adopt a more stable two-handed operation method. The stable gripping method greatly reduces the shaking of the electric chain saw and makes the chain 21 run more smoothly.

[0040] The parting line 12 refers to the line where the two halves of the mold touch each other when closed and determines the shape of the part. When observed from the rear side of the shell 10, taking the parting line 12 of the shell 10 as a reference, the center of gravity of the first battery pack 40 coincides with the parting line 12 of the shell 10. Setting the center of gravity of the first battery pack 40 on the parting line 12 of the shell 10 means that the weight of the battery pack is evenly distributed on both sides of the electric chain saw, which helps to maintain the overall balance of the electric chain saw. This can avoid the problem of the electric chain saw tilting left and right due to the excessive weight of the battery pack as much as possible, making the operation smoother.

[0041] It should be noted that, in this embodiment, the parting line 12 of the housing 10 coincides with the center line of the entire electric chain saw, and the center of gravity of the first battery pack 40 coincides with the parting line 12 of the housing 10, which means that the projection of the center of gravity of the first battery pack 40 in the direction of observation from the rear side of the housing 10 coincides with the parting line 12 of the housing 10. In order to intuitively show the relationship between the first battery pack 40 and the parting line 12 of the housing 10, the invisible part of the parting line 12 of the housing 10 is marked with a dotted line.

[0042] When observed from the rear side of the housing 10, with the parting line 12 of the housing 10 as the reference, if the center of gravity of the battery pack deviates too much from the parting line 12 of the housing 10, the overall balance of the electric chain saw will be affected, which will make the electric chain saw difficult to control during use. A too large center of gravity deviation means that the operator needs to apply more force to maintain the balance of the electric chain saw. Especially during long-term use, this will cause the muscles of the hand, wrist and arm to feel fatigued faster. Therefore, in this application, the center of gravity of the second battery pack 41 is located within the range of -25 mm to 25 mm in the direction perpendicular to the parting line 12 of the housing 10, which helps to achieve the overall balance of the electric chain saw. For easy distinction, as Figure 1 shown in Figure 1 , the distance between the center of gravity of the second battery pack 41 and the parting line 12 of the housing 10 in the direction perpendicular to the parting line 12 is represented by L1. Among them, the value on the left side of the parting line 12 of the housing 10 is negative, and the value on the right side of the parting line 12 of the housing 10 is positive. In this application, L1 is -20 mm. Therefore, in this application, the auxiliary handle 15 is located on the left side of the housing 10, which can help compensate for the change in the additional weight distribution brought by the second battery pack 41, so as to further maintain the balance state of the electric chain saw in the left-right direction. Of course, L1 can also be a suitable value such as -10 mm, 0, 10 mm, etc.

[0043] Furthermore, when observed from the rear side of the housing 10, the first battery pack 40 is vertically placed and the second battery pack 41 is horizontally placed, which can make more effective use of the space inside the electric chain saw. This layout design helps to arrange more or larger-capacity batteries in the compact housing 10, so as to increase the battery capacity without affecting the overall size. The battery packs placed in different directions can help better distribute the weight, improve the balance of the electric chain saw, and also improve the handling performance.

[0044] It should be noted that in this embodiment, the first battery pack 40 and the second battery pack 41 are cuboids.

[0045] Specifically, when observed from the rear side of the housing 10, the long axis of the first battery pack 40 is parallel to the up-down direction of the housing 10, and the short axis is parallel to the left-right direction of the housing 10. The long axis of the vertically placed second battery pack 41 is parallel to the left-right direction of the housing 10, and the short axis is parallel to the up-down direction of the housing 10, which can make more effective use of the space inside the electric chain saw, help balance the overall center of gravity of the electric chain saw, and also make the structure of the electric chain saw more compact.

[0046] Among them, a main handle 16 is provided above the housing 10. The main handle 16 surrounds the housing 10 to form a gripping area 11, which is more in line with the ergonomic design. When the user operates the electric chain saw, they can grip it more naturally and comfortably, effectively reducing the fatigue of the hand during long-term operation. The first battery pack 40 is arranged behind the main handle 16. During the operation, the position of the user's hand is relatively fixed, and the position of the first battery pack 40 will not interfere with the hand operation. Moreover, its weight is distributed behind the hand, which helps to maintain the balance during operation and further improves the operation comfort. The bottom area of the main handle 16 and the area of the housing 10 behind the drive motor 30 form a receiving space 17 for the second battery pack 41. This not only avoids the increase in volume caused by separately creating a space for the second battery pack 41 but also realizes the reasonable placement of the second battery pack 41, making the structure of the entire electric chain saw more compact. The battery capacity is increased within a limited space, improving the space utilization efficiency. It also further optimizes the center-of-gravity distribution of the electric chain saw, making the device more stable during operation and reducing shaking and deviation.

[0047] In order to further make the structure of the electric chain saw more compact, in this embodiment, a first battery slot 13 that is recessed into the main handle 16 is provided behind the main handle 16, and a second battery slot 14 that is recessed into the main handle 16 is provided at the bottom of the main handle 16. The internal space of the electric chain saw can be effectively utilized, enabling the battery pack to fit more closely to the surface of the main handle 16 after installation, making the structure of the electric chain saw more compact and avoiding the excessive protrusion of the battery pack from affecting the grip. Also, when used outdoors, the first battery pack 40 and the second battery pack 41 are respectively detachable from the first battery slot 13 and the second battery slot 14, greatly simplifying the battery pack replacement process. The user can quickly replace the battery pack according to needs.

[0048] To achieve the detachable connection, taking the first battery pack 40 as an example, elastic buckles are provided at the edge of the first battery slot 13, and corresponding slots are provided at the position of the first battery pack 40. During installation, align the first battery pack 40 with the first battery slot 13 and push it in. The elastic buckles are deformed by extrusion. After entering the slots, they rebound and lock, ensuring a firm connection. During disassembly, press the unlocking button of the elastic buckle, and the elastic buckle retracts, then the first battery pack 40 can be taken out. The installation and disassembly of the second battery pack 41 are the same as those of the first battery pack 40.

[0049] To make the cutting of the electric chain saw more stable, when observed from the left and right sides of the housing 10, the first battery pack 40 is inclined. The included angle between the rear plane of the first battery pack 40 and the bottom plane of the housing 10 is α, where 110° ≤ α ≤ 135°. By adjusting the angle of the first battery pack 40, the overall center of gravity distribution of the electric chain saw can be further optimized, which helps improve the operation stability and balance of the electric chain saw, making the cutting process smoother. If the angle is less than 110°, the battery pack may be too vertical, causing the center of gravity of the electric chain saw to be too high when held horizontally, making it prone to shaking and instability. When the angle is greater than 135°, the center of gravity may be too biased to one side, also making it prone to shaking and instability, and may also cause the overall electric chain saw to appear bulky, especially when operating in a narrow space. In this embodiment, α is 120°, which can better distribute the overall weight of the electric chain saw, making its center of gravity more concentrated and stable. Of course, α can also be 125°, 130°

[0050] and other suitable angles.

[0051] Furthermore, when observed from the left and right sides of the housing 10, the plane where the bottom of the second battery pack 41 is located is parallel to the outermost plane of the bottom of the housing 10, making the structure of the electric chain saw flatter. The plane where the bottom of the second battery pack 41 is located is higher than the outermost plane of the bottom of the housing 10. The appropriately elevated position of the second battery pack 41 helps adjust the overall center of gravity of the electric chain saw, thus helping to improve the operation experience of the electric chain saw.

[0052] Since the front end of the electric chain saw is often lighter than the rear end, the lighter front end of the electric chain saw is likely to cause a "floating" feeling during use, making it difficult for the user to push the electric chain saw for cutting. Therefore, in this application, when observed from the left and right sides of the housing 10, the second battery pack 41 is located in front of the first battery pack 40, which can effectively adjust the center of gravity distribution in the front and rear directions of the electric chain saw. This change in the center of gravity can reduce the "floating" feeling caused by the lighter front end of the electric chain saw, making the user more stable when pushing the electric chain saw for cutting.

[0053] It should be noted that the first battery pack 40 and the second battery pack 41 can be lithium batteries. Compared with traditional nickel-cadmium or lead-acid batteries, lithium batteries are lighter in weight. This helps reduce the overall weight of the electric chain saw, thereby reducing the fatigue of the user's wrists and arms during long-term operation. Under the same volume or weight, lithium batteries can store more electrical energy and can provide a longer working time without adding extra weight.

[0054] Furthermore, when observed from the left side of the shell 10, the top contour line of the holding area 11 on the shell 10 is in an inclined state that gradually descends from front to back. The inclined design cooperates with the hand and arm posture of the user when holding the electric chain saw, and can better realize human-computer interaction. When the user holds the electric chain saw and operates it, the arm and wrist can be placed more naturally, reducing the fatigue caused by the unreasonable shape of the shell 10, and improving the comfort and convenience of operation.

[0055] It can be understood that in other embodiments, when observed from the left and right sides of the shell, the plane where the bottom of the second battery pack is located is flush with the outermost plane of the bottom of the shell, which helps to achieve a good balance of the electric chain saw as a whole. This can avoid the problem of center of gravity shift caused by the second battery pack being positioned too high or too low as much as possible, making the electric chain saw more stable during use and facilitating the placement of the electric chain saw.

[0056] It can be understood that in other embodiments, an auxiliary handle is provided on the right side of the shell, and the auxiliary handle provides an additional gripping point, so that the operator can adopt a more stable two-handed operation method. The stable gripping method greatly reduces the shaking of the electric chain saw and makes the chain run more smoothly.

[0057] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. An electric chain saw, comprising a housing (10), a guide rod (20) and a chain (21) wound around the guide rod (20), wherein a driving motor (30) is provided in the housing (10) for driving the chain (21) wound around the guide rod (20) to rotate, characterized in that: A gripping area (11) is provided above the shell (10), a first battery pack (40) is provided behind the gripping area (11), a second battery pack (41) is provided below the gripping area (11), the second battery pack (41) is located behind the drive motor (30), and the first battery pack (40) and the second battery pack (41) are used to supply power to the drive motor (30).

2. The electric chain saw according to claim 1, characterized in that: When viewed from the rear side of the shell (10), taking the parting line (12) of the shell (10) as a reference, the center of gravity of the first battery pack (40) coincides with the parting line (12) of the shell (10).

3. The electric chain saw according to claim 1, characterized in that: When viewed from the rear side of the shell (10), with the parting line (12) of the shell (10) as a reference, the center of gravity of the second battery pack (41) is located within a range of -25 mm to 25 mm on the shell (10) in a direction perpendicular to the parting line (12).

4. The electric chain saw according to claim 1, characterized in that: When viewed from the left and right sides of the shell (10), the first battery pack (40) is arranged tilted, and the angle between the rear plane of the first battery pack (40) and the bottom plane of the shell (10) is α, and 110°≤α≤135°.

5. The electric chain saw according to claim 1, characterized in that: A main handle (16) is provided above the shell (10), and the main handle (16) is arranged around the shell (10) to form the holding area (11). The first battery pack (40) is arranged behind the main handle (16), and the bottom area of ​​the main handle (16) and the shell (10) are located behind the drive motor (30) to form a storage space (17) for accommodating the second battery pack (41).

6. The electric chain saw according to claim 5, characterized in that: A first battery slot (13) recessed into the main handle (16) is provided at the rear of the main handle (16), a second battery slot (14) recessed into the main handle (16) is provided at the bottom of the main handle (16), and the first battery pack (40) and the second battery pack (41) are detachable from the first battery slot (13) and the second battery slot (14), respectively.

7. The electric chain saw according to claim 1, characterized in that: When viewed from the left and right sides of the housing (10), the plane where the bottom of the second battery pack (41) is located is parallel to the outermost plane of the bottom of the housing (10).

8. The electric chain saw according to claim 1, characterized in that: When viewed from the left and right sides of the shell (10), the plane where the bottom of the second battery pack (41) is located is not lower than the outermost plane of the bottom of the shell (10).

9. The electric chain saw according to claim 1, characterized in that: When viewed from the left and right sides of the housing (10), the second battery group (41) is located in front of the first battery group (40).

10. The electric chain saw according to claim 1, characterized in that: When viewed from the rear side of the housing (10), the first battery pack (40) is placed vertically, and the second battery pack (41) is placed horizontally.

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