Electric chain saw

Abstract

The utility model provides an electric chain saw, and belongs to the field of gardening tools. The safety of the battery pack of the electric chain saw during use is improved. An electric chain saw comprises a shell, a driving mechanism arranged in the shell, a first holding part, a second holding part and a battery bin, the first holding part, the second holding part and the battery bin are arranged on the shell, the battery bin is in circuit connection with the driving mechanism, and the first holding part and the second holding part are arranged in the axial extending direction of the electric chain saw at intervals. The projection of the first holding part on the central axis of the shell and the projection of the battery bin on the central axis of the shell partially coincide, and the overlapped part of the projection of the battery bin and the projection of the first holding part is located on the rear portion of the projection of the first holding part.

Description

Technical Field

[0001] The utility model relates to the field of garden tools, in particular to an electric chain saw. Background Art

[0002] Chainsaws are garden tools used for felling and timber harvesting, offering advantages such as portability and ease of operation. Chainsaws are designed to cut large pieces of wood, requiring high power output to meet these demands. Furthermore, to meet this high power output, chainsaws require high power, resulting in larger main components.

[0003] Existing chainsaws with battery packs often employ a solution where the battery pack is located behind the rear handle or between the handle and the drive mechanism. This results in a longer overall length of the chainsaw and occupies more space during transport and storage. Furthermore, when the battery pack is placed beneath the chainsaw, it comes into direct contact with the supporting surface and is exposed to air, which, due to the complex operating environment of the chainsaw, can easily shorten the battery pack's lifespan. Summary of the Invention

[0004] The purpose of the utility model is to solve the above problems in the existing technology and to provide an electric chain saw. The technical problem to be solved by the utility model is to improve the safety of the battery pack of the electric chain saw when it is used.

[0005] The purpose of the utility model can be achieved through the following technical solutions: an electric chain saw, comprising a shell and a grip part 1 and a grip part 2 arranged on the shell, a chain saw is provided at the front end of the shell, a battery compartment is also provided on the shell, a clamping structure is provided in the battery compartment for limiting the battery pack, and it is characterized in that the grip part 1 is located above the battery compartment, and the battery compartment is located at the rear end of the shell and is connected to the external space.

[0006] The principle of this electric chain saw is as follows: the chain saw is arranged on the front side of the shell, the battery compartment is arranged on the rear side of the shell, the battery pack is inserted into the battery compartment along the opening of the shell, and is fixed in the battery compartment through a clamping structure, and the battery compartment is located below the grip part 1, and there is no need to leave space in the front and rear directions of the chain saw to set up the battery compartment, which reduces the overall length of the connection; the battery compartment is connected to the external space, and the battery pack is connected to the outside world when installed in the battery compartment, which is beneficial to the heat dissipation of the battery pack; when the chain saw is in use, the grip part 1 and the grip part 2 are held by hand, and the battery pack is located below the grip part. The shell plays a shielding and protective role for the battery pack, avoiding the battery pack from being hit, thereby improving the safety of the electric chain saw battery pack when in use.

[0007] In the aforementioned electric chainsaw, the battery compartment is opened along the front-to-back axis of the electric chainsaw, with the opening facing the rear end of the electric chainsaw. When the chainsaw is in use, the first and second handles primarily move laterally. For ease of use, the rear end of the housing faces the user, thereby reducing the risk of impact to the battery pack located at the rear end of the housing.

[0008] In the above-mentioned electric chain saw, the circuit board and the driving mechanism are arranged in the housing at intervals, and the circuit board is located between the driving mechanism and the battery compartment.

[0009] In the aforementioned electric chain saw, a heat dissipation cavity is formed between the circuit board and the drive mechanism, and between the circuit board and the battery compartment. The housing is provided with a first air inlet, which is located between the drive mechanism and the circuit board and communicates with the heat dissipation cavity. The heat dissipation cavity prevents excessive concentration of heat from the drive mechanism and the circuit board.

[0010] In the aforementioned electric chain saw, the distance between the circuit board and the battery compartment is shorter than the distance between the circuit board and the drive mechanism. A heat sink is further provided within the housing, and the circuit board is mounted on the side of the heat sink facing the drive mechanism. Mounting the circuit board on the side of the heat sink facing the drive mechanism prevents heat from the circuit board from directly dissipating into the battery compartment.

[0011] In the above-mentioned electric chain saw, the bottom of the battery compartment is provided with an interface for connecting to the battery pack, the bottom of the battery compartment is provided with a second air inlet, and the air inlet is connected to the heat dissipation cavity. The opening at the bottom of the battery compartment allows for better heat dissipation of the battery pack.

[0012] In the aforementioned electric chain saw, a baffle is provided on the second air inlet, projecting from the second air inlet toward the heat dissipation cavity. The baffle can prevent objects from entering the battery compartment. The baffle protrudes from the second air inlet, reducing obstruction to the second air inlet and improving heat dissipation from the battery compartment.

[0013] In the aforementioned electric chain saw, the second grip portion is located in front of the first grip portion, the first grip portion extends from the rear end of the housing to the front end of the housing, the first extension end of the first grip portion is located above the circuit board, and the upper portions of the first grip portion and the second grip portion are flush. In the aforementioned electric chain saw, the battery compartment is provided with an ejection mechanism, the ejection mechanism being arranged in the axial direction of the battery compartment, wherein the ejection mechanism is squeezed or ejected in the axial direction by elastic deformation.

[0014] In the above-mentioned electric chain saw, the battery compartment is provided with a locking mechanism, wherein the locking mechanism includes a locking member transmission-connected to the release button, wherein the locking member is formed on the radial side wall of each battery compartment, and the locking member has a locking position and a release position, and the locking member moves between the locking position and the release position, and when the locking member is squeezed or the release button is triggered, the locking member moves from the locking position to the release position.

[0015] In the above-mentioned electric chain saw, the shell is provided with a cover plate and forms a chain saw chamber, the chain saw chamber is opened and closed by the detachable cover plate, the chain saw chamber is provided with a rotating wheel, the chain saw chamber is connected to the external space, and the rotating wheel is transmission-connected to the driving mechanism so that the saw chain wound around a guide rod and transmission-connected to the rotating wheel is driven to rotate.

[0016] In the above-mentioned electric chain saw, it includes: a battery pack, which is pluggable and placed in the battery compartment and partially exposed outside the shell; and an electrical connector, which is arranged in the battery compartment and has a circuit connected to the battery pack.

[0017] In the above-mentioned electric chain saw, the portion of the battery pack exposed from the outer shell does not exceed 1 / 2 of its length, and the rear end surface of the battery compartment does not exceed the rear end surface of the grip portion.

[0018] In the aforementioned electric chain saw, a locking member is provided within the battery compartment, an L-shaped slot is provided on the battery pack, the slot having a wider width on the side closer to the bottom of the battery compartment than on the side closer to the exterior of the housing, a gradually varying width limiting protrusion is provided on the sidewall of the battery compartment, locking members are provided on both sides of the battery pack, and a slide groove is provided on both sides of the battery pack, with the locking member located within the slide groove. The locking member and the slot cooperate to secure the battery pack within the battery compartment and prevent the battery pack from being installed in the wrong direction within the battery compartment. The limiting protrusion and the slide groove, and the locking member and the slot cooperate to facilitate proper installation of the battery pack within the battery compartment.

[0019] An electric chain saw, characterized by a shell, a drive mechanism arranged in the shell, and a battery compartment, the battery compartment having at least two battery cavities connected to the external space, the battery compartment having at least two second air inlets respectively arranged in the two battery cavities, the shell having a heat dissipation cavity and a first air inlet and an air outlet connected to the heat dissipation cavity, the second air inlet being connected to the heat dissipation cavity and the battery cavity, and the pop-up mechanism and the second air inlet of the battery compartment being arranged coplanarly.

[0020] An electric chain saw, characterized in that it includes a shell, a drive mechanism placed in the shell, a grip part 1 and a grip part 2 arranged on the shell, and a battery compartment, the battery compartment circuit is connected to the drive mechanism, the grip part 1 and the grip part 2 are arranged at intervals in the axial extension direction of the electric chain saw, the projection of the grip part 1 on the central axis of the shell and the projection of the battery compartment on the central axis of the shell partially overlap, and the overlapping part of the projection of the battery compartment and the projection of the grip part 1 is located behind the projection of the grip part 1.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] 1. In the electric chain saw, this solution places the battery compartment at the rear, directs the battery pack toward the rear end of the housing, arranges the first grip and the second grip above the housing, and arranges the chain saw at the front side of the housing. This arrangement prevents the battery pack from being hit, and when the chain saw is in use, the rear end of the housing faces the user, so the battery pack at the rear end of the housing is not easily hit, thereby improving the safety of the battery pack.

[0023] 2. In this solution, a second air inlet is provided at the bottom of the battery compartment to improve the heat dissipation effect of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the electric chain saw of the utility model;

[0025] Figure 2 This is a schematic diagram of the vertical structure of the chain saw bin of the electric chain saw of the present utility model;

[0026] Figure 3 This is a schematic diagram of the three-dimensional structure of the electric chain saw of the utility model;

[0027] Figure 4 This is a three-dimensional structural diagram of the battery pack and battery compartment in the electric chain saw of the utility model.

[0028] Figure 5 This is a schematic cross-sectional view of the electric chain saw of the present utility model;

[0029] Figure 6 This is a schematic diagram of the exploded structure of the electric chain saw of the utility model;

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of the electric chain saw of the present utility model.

[0031] In the figure, 1. shell; 2. chain saw compartment; 2a. cover plate; 2b. guide rod; 2c. rotating wheel; 2d. saw chain; 2e. opening; 3. grip part 1; 3a. button; 4. grip part 2; 5. battery compartment; 5b. interface; 5c. locking piece; 5d. limiting protrusion; 5e. second air inlet; 5f. baffle; 5g. release button; 5h. ejection mechanism; 6. battery pack; 6a. card slot; 6b. slide slot; 7. release button; 8. circuit board; 9. drive mechanism; 10. heat dissipation cavity; 11. heat sink; 12. first air inlet; 13. heat dissipation vent. DETAILED DESCRIPTION

[0032] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0033] like Figure 1 Combine Figure 2 and Figure 3 As shown, a chainsaw comprises a housing 1, with a chainsaw chamber 2 disposed at the front end of the housing 1. A chainsaw is secured within the chainsaw chamber 2. Specifically, the chainsaw chamber 2 is formed by a cover plate 2a fixedly mounted on the housing 1, forming a cavity between the housing 1 and the cover plate 2a. A guide rod 2b and a rotating wheel 2c are disposed within the chainsaw chamber 2. The rotating wheel 2c is connected to a transmission structure of the chainsaw, which drives the rotating wheel 2c to rotate. A saw chain 2d is sleeved on the guide rod 2b and the rotating wheel 2c, which drives the saw chain 2d along the guide rod 2b. A notch is provided below the cover plate 2a. The cover plate 2a and the housing 1 form an opening 2e for the chainsaw chamber 2. The opening 2e facilitates the discharge of waste chips that enter the chainsaw chamber 2. A second grip portion 4 is provided above the housing 1. One end of the second grip portion 4 is screwed to the lower left front end of the housing 1. The other end of the second grip portion 4 is also screwed to the housing 1 within the chainsaw compartment 2. The other end of the second grip portion 4 is shielded by a cover 2a. A hand guard is provided at the front end of the second grip portion 4 to protect the hand from being scratched by flying sawdust. A grip part 13 is provided on the rear side of the grip part 24. The grip part 13 extends from the rear end of the shell 1 to the front end of the shell 1. The grip part as a whole is offset to the left side of the shell 1. The grip part 13 is located in the middle position above the shell 1. The upper parts of the grip part 13 and the grip part 24 are roughly flush. The grip part 13 and the shell 1 are integrally formed. As an alternative, the grip part 13 and the shell 1 are of a split structure. The grip part 13 can be fixed to the shell 1 by means of screws or other structures. A button 3a for controlling the movement of the saw chain 2d is provided on the grip part 3. The button 3a is located on the side of the grip part 1 facing the shell 1 to facilitate user operation.

[0034] The grip portion 1 3 is located at the center axis of the housing 1 (see the accompanying drawings in the specification). Figure 5The projection l of AA) and the projection m of the battery compartment 5 on the central axis of the shell 1 partially overlap, and the overlapping part of the projection m of the battery compartment 5 and the projection l of the grip part 3 is located behind the projection l of the grip part 3.

[0035] The projection q of the drive mechanism 9 on the central axis of the housing 1, the projection p of the circuit board 8 on the central axis of the housing 1 and the projection of the battery compartment 5 on the central axis of the housing 1 respectively at least partially overlap with the projection l of the grip portion 3 on the central axis of the housing 1.

[0036] like Figure 4 Combine Figure 6 As shown, a battery compartment 5 is further provided at the rear end of the housing 1. The battery compartment 5 is connected to the external space. The battery compartment 5 is installed in the housing 1 and is stopped by the lower housing. There is a battery pack 6 inserted in the battery compartment 5 along the front and rear end direction of the housing 1. The number of battery packs 6 and battery compartments 5 are both two. The battery pack 6 is partially located outside the battery compartment 5 and exposed outside the housing 1. In this embodiment, the portion of the battery pack 6 exposed from the housing does not exceed 1 / 2 of the length of the battery pack. More preferably, the portion of the battery pack 6 exposed from the housing does not exceed 1 / 4 of the length of the battery pack. Furthermore, the portion of the battery pack 6 exposed from the housing is between 0.5cm and 5cm.

[0037] Furthermore, the battery compartment 5 is assembled at the rear of the housing 1 in a limited manner, and the battery compartment 5 is provided with an opening opening toward the rear.

[0038] The portion of the battery pack 6 exposed from the housing 1 is provided with heat dissipation holes, and the bottom of the battery compartment 5 is provided with an interface 5b. After the battery pack 6 is installed in place in the battery compartment 5, the battery pack 6 and the interface 5b are connected. The battery compartment 5 is provided with a locking member 5c.

[0039] The battery pack 6 is provided with an L-shaped slot 6a. The side of the slot 6a near the bottom of the battery compartment 5 is wider than the side near the outside of the housing 1. A locking member 5c engages within the slot 6a at the bottom of the battery compartment 5, locking the battery pack 6 in the battery compartment 5 and preventing it from falling out during use, thereby affecting the operation of the chainsaw. The housing 1 also includes a release button 7, located below the first grip portion, which controls the movement of the locking member 5c, i.e., its extension and retraction within the battery compartment 5. The upper and lower walls of the battery compartment 5 are provided with gradually varying width stopper protrusions 5d.

[0040] In a preferred embodiment, the limiting protrusion 5d is an elongated protrusion. Specifically, the closer the limiting protrusion 5d is to the bottom of the battery compartment 5, the wider it becomes. Slide grooves 6b are provided on both sides of the battery pack 6. The width of the slide grooves 6b matches the width of the limiting protrusion 5d. When the battery pack 6 is installed in the battery compartment 5, the locking member 5c is located within the slide grooves 6b. The locking member 5c and the latching slot 6a cooperate to lock the battery pack 6 in the battery compartment 5 and prevent the battery pack 6 from being installed in the wrong direction within the battery compartment. The limiting protrusion 5d and the slide groove 6b, and the locking member 5c and the latching slot 6a cooperate to facilitate the installation of the battery pack 6 in the battery compartment 5. The lower rear end of the battery compartment 5 is vertically curved. This vertically curved lower rear end of the battery compartment 5 causes the lower rear end of the battery compartment 5 to retract inward relative to the upper side, facilitating the installation of the battery pack 6 in the battery compartment 5.

[0041] The battery compartment 5 further includes a locking mechanism, comprising a release button 5g and a locking member 5c drivingly connected to the release button 5g. The locking member 5 projects conically from the sidewall of the battery compartment in the axial direction, and increasingly protrudes from the sidewall along the airflow direction of the battery compartment. When the battery pack 6 is inserted into the battery compartment 5 in the direction of the battery compartment opening, the locking member 5c is pushed out of the battery compartment 5 by the battery pack until the battery pack is positioned in the predetermined position within the battery compartment. The locking member 5c is no longer obstructed by the battery pack and is retained within a locking space within the battery pack, thereby locking the battery pack with the locking mechanism.

[0042] That is, the locking member 5c is formed on the radial side wall of each battery compartment 5, and the locking member 5c has a locking position and a release position. The locking member 5c moves between the locking position and the release position. When the locking member 5c is squeezed or the release button is triggered, the locking member 5c moves from the locking position to the release position.

[0043] The locked position refers to the locking member being out of the battery cavity of the battery compartment 5, and the released position refers to the locking member being protruding into the battery cavity of the battery compartment. It is worth noting that the locking member can be moved from the released position to the locked position by external force (such as the battery pack being pushed in) or by the release button being triggered.

[0044] When the release button 5g of the locking mechanism is triggered, the release button 5g drives the locking member 5c to exit the battery compartment, so that the battery pack 6 is unlocked for a limited time.

[0045] In this embodiment, the battery compartment 5 is provided with a locking mechanism and has at least two battery cavities. The locking mechanism is arranged at the upper part of the battery compartment 5 in the height direction. The locking mechanism includes a release button 5h and at least two locking members 5c that are transmission-connected to the release button 5h. The two locking members 5c protrude into the two battery cavities respectively. When the release button 5h is triggered, the locking members 5c can simultaneously move from a locking position to a release position to exit the battery cavity.

[0046] The release button 5h is exposed on the surface of the battery compartment 5 and is held between the battery compartment 5 and the grip part 3, so that the user can directly press down to release the battery pack 9 when holding the grip part 3.

[0047] The battery compartment 5 further includes two ejection mechanisms 5h, which are respectively provided in the two battery cavities, and the ejection mechanisms 5h and the second air inlet 13 of the battery compartment 5 are provided coplanarly. Figure 5 Combine Figure 4 and Figure 6 As shown, a circuit board 8 is provided within the housing 1. The circuit board 8 and a drive mechanism 9 are spaced apart within the housing 1. The drive mechanism 9 includes a motor and gears, and the drive mechanism 9 drives the rotating wheel 2c to rotate. The circuit board 8 is located between the drive mechanism 9 and the battery compartment 5. The distance between the circuit board 8 and the battery compartment 5 is smaller than the distance between the circuit board 8 and the drive mechanism 9. A heat dissipation cavity 10 is formed between the circuit board 8 and the drive mechanism 9, and between the circuit board 8 and the battery compartment 5. A heat sink 11 is also provided within the housing 1. The circuit board 8 is mounted on the heat sink 11. The second air inlet 5e of the heat sink 11 faces the drive mechanism 9. A first air inlet 12 is provided on the housing 1. The first air inlet 12 is located between the drive mechanism 9 and the circuit board 8 and communicates with the heat dissipation cavity 10. A second air inlet 5e is provided in the battery compartment 5, and the opening 5e communicates with the heat dissipation cavity 10. A baffle 5f is provided on the bottom of the battery compartment 5, near the heat dissipation cavity 10. The baffle 5f is located above the opening 5e and protrudes from the opening 5e.

[0048] The air inlet duct extends along the axial direction of the electric chain saw toward the drive mechanism. The ejection mechanism 5h is squeezed or ejected in the axial direction by elastic deformation. Furthermore, when the battery pack 6 is placed in the battery compartment, the ejection mechanism 5h is compressed by the battery pack 6. When the battery pack 6 is unlocked for a limited time, the locking mechanism recovers its elastic deformation, ejecting the battery pack 6. In other words, when the release button is triggered, both battery packs are released with a single click.

[0049] The first air inlet 12 and the second air inlet are respectively connected to the heat dissipation cavity 10, so that the heat of the drive mechanism 9 placed in the housing 1 is removed by air and connected to the outside space through the heat dissipation vent 13. The second air inlet removes heat from the battery pack 6 in the battery compartment 5.

[0050] It's worth noting that the drive mechanism 9 includes a motor with its own fan to drive air flow. Specifically, the first and second air inlets 12 and 13 are connected to the motor in the heat dissipation cavity 10, allowing the heat from the motor within the housing 1 to be removed by the air. The heat dissipation vent 13 is then connected to the outside world. The second air inlet removes heat from the battery pack 6 within the battery compartment 5.

[0051] More specifically, the battery packs located in the two battery cavities are each connected to the heat dissipation cavity 10 via a second air inlet, allowing for heat dissipation. Through the layout of this embodiment, the housing provides a shielding and protective function for the battery pack 6, protecting it from impact. Furthermore, when the chainsaw is in use, the rear end of the housing 1 faces the user, making the battery pack 6 located at the rear end of the housing 1 less susceptible to impact, thereby improving the safety of the battery pack 6. Furthermore, the second air inlet 5e of the battery compartment 5 is formed axially of the compartment 5, further enhancing heat dissipation from the battery pack 6.

[0052] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0053] Although this document frequently uses terms such as 1. housing; 2. chain saw housing; 2a. cover plate; 2b. guide rod; 2c. rotating wheel; 2d. saw chain; 2e. opening; 3. grip portion 1; 3a. button; 4. grip portion 2; 5. battery compartment; 5a. lower housing; 5b. interface; 5c. locking member; 5d. limiting protrusion; 5e. second air inlet; 5f. baffle; 5g. release button; 5h. eject mechanism; 6. battery pack; 6a. slot; 6b. slide; 7. release button; 8. circuit board; 9. drive mechanism; 10. heat dissipation cavity; 11. heat sink; 12. first air inlet; 13. heat dissipation vent, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. An electric chain saw, characterized in that: The electric chain saw comprises a shell, a driving mechanism disposed in the shell, a grip part 1 and a grip part 2 arranged on the shell, and a battery compartment, wherein the battery compartment circuit is connected to the driving mechanism, the grip part 1 and the grip part 2 are arranged at intervals in the axial extension direction of the electric chain saw, the projection of the grip part 1 on the central axis of the shell and the projection of the battery compartment on the central axis of the shell partially overlap, and the overlapping part of the projection of the battery compartment and the projection of the grip part 1 is located behind the projection of the grip part 1.

2. The electric chain saw according to claim 1, wherein: The electric chain saw includes a circuit board, and the projection of the drive mechanism on the central axis of the shell, the projection of the circuit board on the central axis of the shell, and the projection of the battery compartment on the central axis of the shell respectively at least partially overlap with the projection of the grip portion on the central axis of the shell.

3. The electric chain saw according to claim 1, characterized in that The electric chain saw further includes two battery packs, which are respectively connected to the driving mechanism in circuits. The battery packs are pluggable and placed in the battery compartment, and are partially exposed outside the shell. The projection of the grip on the central axis of the shell partially overlaps with the projection of the battery pack on the central axis of the shell.

4. The electric chain saw according to claim 1, wherein: The shell is provided with a cover plate and forms a chain saw chamber, and the chain saw chamber is opened and closed by the detachable cover plate. The chain saw chamber is provided with a rotating wheel, and the chain saw chamber is connected to the external space. The rotating wheel is transmission-connected to the driving mechanism so that the saw chain wound around a guide rod and transmission-connected to the rotating wheel is driven to rotate.

5. The electric chain saw according to claim 1, wherein: The battery compartment is limitedly assembled at the rear of the shell, and the battery compartment is provided with an opening that opens rearward in the central axis direction of the shell.

6. The electric chain saw according to claim 1, characterized in that The shell, the driving mechanism arranged in the shell and the battery compartment, the battery compartment has at least two battery cavities connected to the external space, the battery compartment has at least two second air inlets respectively arranged in the two battery cavities, the shell has a heat dissipation cavity and a first air inlet and an air outlet connected to the heat dissipation cavity, and the second air inlet is connected to the heat dissipation cavity and the battery cavity.

7. The electric chain saw according to claim 1, characterized in that: A circuit board (8) is provided in the housing (1), and the circuit board (8) and the driving mechanism (9) are arranged in the housing (1) at intervals, with the circuit board (8) being located between the driving mechanism (9) and the battery compartment (5).

8. The electric chain saw according to claim 7, characterized in that: A heat dissipation cavity (10) is formed between the circuit board (8) and the drive mechanism (9) and between the circuit board (8) and the battery compartment (5); the housing (1) is provided with a heat dissipation port (12); the heat dissipation port (12) is located between the drive mechanism (9) and the circuit board (8) and is in communication with the heat dissipation cavity (10).

9. The electric chain saw according to claim 7, characterized in that: The distance between the circuit board (8) and the battery compartment (5) is smaller than the distance between the circuit board (8) and the driving mechanism (9). A heat sink (11) is further provided in the housing (1), and the circuit board (8) is mounted on a side of the heat sink (11) facing the driving mechanism (9).

10. The electric chain saw according to claim 1, characterized in that: The battery compartment has a battery pack inserted along the front and rear ends of the housing, and the battery pack is partially located outside the battery compartment and exposed outside the housing, wherein: The portion of the battery pack exposed from the outer shell does not exceed 1 / 2 of its length, and the rear end face of the battery compartment does not exceed the rear end face of the first grip portion.

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