Controller heat dissipation structure of electric chain saw

Abstract

The utility model discloses a controller heat dissipation structure of an electric chain saw, which comprises a casing, an aluminum bottom cover plate and a controller, the bottom cover plate is mounted at the bottom of the casing, the bottom cover plate and the casing enclose to form an inner cavity, the side of the casing is provided with an air inlet communicated with the inner cavity, the bottom cover plate is provided with an air outlet communicated with the inner cavity, and the controller is arranged in the air outlet. The controller is installed in the inner cavity and attached to the bottom cover plate, heat generated by heating when the controller works can be dissipated out through the aluminum bottom cover plate so that the heat dissipation requirement of the controller can be met, the service life of the controller can be prolonged, and the aluminum bottom cover plate is light in weight and low in cost.

Description

Technical Field

[0001] The utility model relates to an electric chain saw, in particular to a heat dissipation structure of a controller of the electric chain saw. Background Art

[0002] As a portable cutting tool, electric chain saw can be used to cut wood, stone, steel, etc., which greatly saves time and manpower spent on cutting materials. Electric chain saw generally works by driving the circulating chain cutter by the driving mechanism. When the electric chain saw is working, the controller will generate a lot of heat energy. If the controller is in a high temperature environment, it will affect its life and function.

[0003] In order to solve the above problems, there are structures on the market that use a fan on the motor to dissipate heat from the controller. For example, the garden tool disclosed in Chinese utility model patent CN211671502U includes a functional element; a motor for driving the functional element; a casing, which surrounds a storage space for accommodating at least part of the motor. The garden tool also includes a circuit board and a fan at least partially arranged in the storage space. The circuit board is electrically connected to the motor, and the fan is connected to the motor. The casing is also formed with a main air inlet and an air outlet. When the fan rotates, the first heat dissipation airflow that enters the casing through the main air inlet and flows out of the casing from the air outlet flows through the circuit board and the motor to dissipate heat from the circuit board and the motor.

[0004] Another example is the heat dissipation and air guide structure of the electric chain saw motor disclosed in the Chinese utility model patent CN220629045U, which includes a motor installed in the housing of the electric chain saw, a mounting cavity is provided on the motor, a heat dissipation fan is rotatably installed in the mounting cavity, the heat dissipation fan takes in air axially and discharges air radially, a plurality of air outlets are provided on the side wall of the mounting cavity, an air outlet guide shell is installed on the motor, the air outlet guide shell encloses and closes all the air outlets on the cavity wall of the mounting cavity, a side port is provided on the side wall of the air outlet guide shell, the side port is opposite to one of the air outlets and connected to the mounting cavity A guide circle with a spacing from small to large is formed between the inner wall of the air outlet guide shell and the outer circle of the cooling fan. The large end of the guide circle is connected with the side port. An air inlet is provided on the upper end surface of the casing, and an air outlet is provided on the side of the casing. The side port of the air outlet guide shell is connected with the air outlet. When the cooling fan rotates, external air enters the casing from the air inlet. The wind entering the casing takes away the heat from the controller installed in the casing, passes through the inside of the motor, and is blown out from the side port on the air outlet guide shell. The blown air is discharged from the air outlet to achieve heat dissipation of the controller.

[0005] In the prior art electric chain saws, heat is generally dissipated by the controller in the casing by an airflow generated by a fan connected to the motor to take away the heat from the controller. However, as the performance requirements of electric chain saws become higher and higher, the power of the motor is also becoming higher and higher. The motor and the controller both have serious heat generation problems, which makes the heat in the casing high. The method of dissipating heat to the controller by generating negative pressure in the casing through the rotation of the fan to form an airflow has a poor heat dissipation effect and can no longer meet the heat dissipation requirements of the controller. Utility Model Content

[0006] Based on the fact that the above-mentioned method of generating negative pressure in the casing by rotating the fan to form an airflow to dissipate heat for the controller has a poor heat dissipation effect and cannot well meet the problem of heat dissipation of the controller, the utility model provides a heat dissipation structure for the controller of an electric chain saw.

[0007] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a controller heat dissipation structure of an electric chain saw, including a casing, an aluminum bottom cover plate and a controller, the bottom cover plate is installed at the bottom of the casing, the bottom cover plate and the casing are enclosed to form an inner cavity, the side of the casing is provided with an air inlet connected to the inner cavity, the bottom cover plate is provided with an air outlet connected to the inner cavity, the controller is installed in the inner cavity, and the controller is abutted against the bottom cover plate.

[0008] A further preferred technical solution of the present invention is: a receiving groove is provided on the inner side of the bottom cover plate, and the controller is at least partially arranged in the receiving groove and abuts against the bottom cover plate.

[0009] A further preferred technical solution of the utility model is that a plurality of heat dissipation fins are formed on the outer surface of the bottom cover plate exposed to the outside.

[0010] A further preferred technical solution of the utility model is that a flat outer surface is formed on the outer side of the bottom cover plate and is exposed to the outside.

[0011] A further preferred technical solution of the utility model is: a driving motor and a cooling fan are installed in the inner cavity, the cooling fan is connected to the driving motor, and when the cooling fan rotates, an airflow is formed which enters the inner cavity from the air inlet and is discharged from the air outlet.

[0012] Another topic: The heat dissipation structure of the controller of an electric chain saw includes a casing, an aluminum bottom cover plate and a controller, the bottom cover plate is installed at the bottom of the casing, the bottom cover plate and the casing are combined to form an inner cavity, the side of the casing is provided with an air inlet connected to the inner cavity, the bottom cover plate is provided with an air outlet connected to the inner cavity, the controller is installed in the inner cavity, a heat-conducting member for heat conduction is provided between the controller and the bottom cover plate, the controller is abutted against the heat-conducting member, and the heat-conducting member is abutted against the bottom cover plate.

[0013] A further preferred technical solution of the utility model is: the controller and the heat-conducting member are combined into a whole, a receiving groove is provided on the inner side of the bottom cover plate, the whole is at least partially placed in the receiving groove and abuts against the bottom cover plate, a groove is provided on the top of the heat-conducting member, the controller is placed in the groove and combined with the heat-conducting member to form the whole.

[0014] A further preferred technical solution of the utility model is that a plurality of heat dissipation fins are formed on the outer surface of the bottom cover plate exposed to the outside.

[0015] A further preferred technical solution of the utility model is that a flat outer surface is formed on the outer side of the bottom cover plate and is exposed to the outside.

[0016] A further preferred technical solution of the utility model is: a driving motor and a cooling fan are installed in the inner cavity, the cooling fan is connected to the driving motor, and when the cooling fan rotates, an airflow is formed which enters the inner cavity from the air inlet and is discharged from the air outlet.

[0017] Compared with the prior art, the advantage of the utility model is that by replacing the bottom of the casing with an aluminum bottom cover, the controller is attached to the bottom cover, and the heat generated by the controller when it is working can be dissipated through the aluminum bottom cover to meet the heat dissipation requirements of the controller, thereby increasing the life of the controller, and the aluminum bottom cover is light in weight and low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 Schematic diagram of the overall structure of an electric chain saw Figure 1 ;

[0020] Figure 2 Schematic diagram of the overall structure of an electric chain saw Figure 2 ;

[0021] Figure 3 The disassembled diagram is of the left half shell, the right half shell and the bottom end cover;

[0022] Figure 4 This is a diagram of the bottom end cover of Example 2 being disassembled from the casing.

[0023] Figure 5 The structure of the drive motor, bottom cover and controller of the second embodiment is shown in FIG. Figure 1 ;

[0024] Figure 6 The structure of the drive motor, bottom cover and controller of the second embodiment is shown in FIG. Figure 2 ;

[0025] Figure 7 The cross-section diagram of the drive motor, bottom end cover and controller of the second embodiment Figure 1 ;

[0026] Figure 8 The cross-section diagram of the drive motor, bottom end cover and controller of the second embodiment Figure 2 ;

[0027] Fig. 9 This is a schematic diagram of the structure of the controller, heat conducting member and bottom end cover of the second embodiment;

[0028] Fig.10 This is a disassembled view of the entire second embodiment and the bottom end cover.

[0029] In the figure: 1. casing; 2. bottom cover; 3. air outlet; 4. air inlet; 5. left half shell; 6. right half shell; 7. bolt hole; 8. boss; 9. slot; 10. connection seat; 11. plug-in column; 12. threaded hole; 13. bottom plate; 14. side plate; 15. bottom opening; 16. side opening; 17. heat conducting part; 18. controller; 19. air guide cover; 20. cover opening; 21. drive motor; 22. receiving groove; 23. cooling fan; 24. side opening; 25. groove; 26. heat conducting strip; 27. guide ring. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0031] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0032] Embodiment 1

[0033] Figure 1-Figure 3 As shown, the controller heat dissipation structure of the electric chain saw includes a casing 1, an aluminum bottom cover 2 and a controller 18. An opening is provided at the bottom of the casing 1, and the bottom cover 2 is installed at the bottom of the casing 1 to cover the opening. The bottom cover 2 and the casing 1 are enclosed to form an inner cavity, and the inner cavity is used to install components such as a drive motor 21 and a controller 18.

[0034] Figure 3As shown, preferably, the housing 1 includes a left half shell 5 and a right half shell 6, which are fixed by screws after being matched, and the bottom cover plate 2 is located between the left half shell 5 and the right half shell 6. Laterally protruding plug-in columns 11 are provided on both sides of the bottom cover plate 2, and slots 9 that are plugged and matched with the plug-in columns 11 are provided on the inner side walls of the left half shell 5 and the right half shell 6. A threaded hole 12 is provided on the end surface of the plug-in column 11 opposite to the left half shell 5 or the right half shell 6. The outer walls of the left half shell 5 and the right half shell 6 are both provided with bolt holes 7 connected to the bottom of the slot 9. When the left half shell 5 and the right half shell 6 are connected together, the plug-in column 11 is inserted into the corresponding slot 9, so that the bolt hole 7 and the threaded hole 12 are connected to each other. Bolts are provided between the bottom cover plate 2 and the left half shell 5 and the right half shell 6 on both sides, passing through the bolt holes 7 and threadedly connected with the threaded holes 12, so that the bottom cover plate 2 is fixedly connected with the left half shell 5 and the right half shell 6 on both sides.

[0035] Preferably, both sides of the bottom cover plate 2 are provided with a connecting seat 10 extending upward, and the plug-in column 11 is set on the connecting seat 10. The inner wall of the left half shell 5 and the right half shell 6 is provided with an inwardly convex boss 8, and the slot 9 is opened on the boss 8. By setting the boss 8, the wall thickness of the left half shell 5 and the right half shell 6 does not need to be too thick.

[0036] Preferably, the opening includes a bottom opening 15 provided on the bottom surface of the casing 1 and a side opening 16 provided on the front side surface of the casing 1, the bottom opening 15 and the side opening 16 are connected to form the opening at the bottom of the casing 1, the bottom cover plate 2 includes a bottom plate 13 covering the bottom opening 15 and a side plate 14 covering the side opening 16, the side plate 14 extends upward from the front end of the bottom plate 13, and the side plate 14 and the bottom plate 13 are integrally formed.

[0037] The controller 18 is installed in the inner cavity, and the controller 18 is attached to the bottom cover 2. The heat generated by the controller 18 when working can be dissipated through the aluminum bottom cover 2 to meet the heat dissipation requirements of the controller 18 and improve the life of the controller 18. The aluminum bottom cover 2 is light in weight and low in cost.

[0038] The aluminum bottom cover plate 2 may be made of pure aluminum or an aluminum alloy.

[0039] Preferably, a flat outer surface is formed on the outer side of the bottom cover plate 2 and is exposed to the outside, and the outer surface is used to dissipate heat to the outside.

[0040] Alternatively, in another solution, a plurality of heat dissipation fins are formed on the outer surface of the bottom cover plate 2 exposed to the outside, and the heat dissipation fins increase the heat dissipation area of ​​the bottom cover plate 2, so that the bottom cover plate 2 has a better heat dissipation effect. This is not shown in the drawings.

[0041] Preferably, a receiving groove 22 is provided on the inner side of the bottom cover plate 2, and the controller 18 is at least partially placed in the receiving groove 22 and abuts against the bottom cover plate 2, which not only plays a role in better positioning the controller 18, but also enables the heat generated by the controller 18 to be better transferred to the bottom cover plate 2.

[0042] Preferably, the controller 18 can be fixed on the bottom cover plate 2 , or the controller 18 can be fixed on the housing 1 or other components in the housing 1 .

[0043] An air inlet 4 connected to the inner cavity is provided on the side of the casing 1, and an air outlet 3 connected to the inner cavity is provided on the bottom cover plate 2. External air can enter the casing 1 from the air inlet 4 and be discharged from the air outlet 3 on the bottom cover plate 2. When the external air passes through the inner cavity, it takes away the heat generated by the controller 18.

[0044] A driving motor 21 and a cooling fan 23 are installed in the inner cavity. The cooling fan 23 is connected to the driving motor 21 . When the cooling fan 23 rotates, an airflow is formed which enters the inner cavity from the air inlet 4 and is discharged from the air outlet 3 .

[0045] Preferably, an air guide hood 19 is sleeved on the outer side of the driving motor 21 and the cooling fan 23, and one end of the air guide hood 19 has a hood opening 20 for supplying air to the interior, and a side opening 24 is opened on the side wall of the air guide hood 19. The cooling fan 23 is located on the side of the driving motor 21 away from the hood opening 20. The cooling fan 23 takes in air axially and discharges air radially. A guide ring 27 with a spacing from small to large is formed between the inner wall of the air guide hood 19 and the outer ring of the cooling fan 23, and the large-mouthed end of the guide ring 27 is connected to the side opening 24, and the side opening 24 is connected to the air outlet 3. When the cooling fan 23 rotates, external air enters the inner cavity from the air inlet 4, and the air entering the inner cavity takes away part of the heat on the controller 18. Then, the air entering the inner cavity enters the air guide hood 19 from the hood opening 20, passes through the driving motor 21, and is driven by the cooling fan 23 to flow along the guide ring 27, and is discharged from the air guide hood 19 through the side opening 24 from the large-mouthed end of the guide ring 27. The air discharged from the air guide hood 19 is discharged from the inner cavity from the air outlet 3.

[0046] The air guide cover 19 is arranged directly above the controller 18 .

[0047] Embodiment 2

[0048] The difference between this embodiment and the first embodiment is that the controller 18 and the bottom cover plate 2 are in direct contact and heat conduction. The first embodiment is that the controller 18 and the bottom cover plate 2 are in direct contact and heat conduction, while the second embodiment is that the controller 18 and the bottom cover plate 2 are indirect contact and heat conduction. The specific contents are as follows:

[0049] Figure 1-Figure 10As shown, the controller heat dissipation structure of the electric chain saw includes a casing 1, an aluminum bottom cover 2 and a controller 18. An opening is provided at the bottom of the casing 1, and the bottom cover 2 is installed at the bottom of the casing 1 to cover the opening. The bottom cover 2 and the casing 1 are enclosed to form an inner cavity, and the inner cavity is used to install components such as a drive motor 21 and a controller 18.

[0050] Figure 3 As shown, preferably, the housing 1 includes a left half shell 5 and a right half shell 6, which are fixed by screws after being matched, and the bottom cover plate 2 is located between the left half shell 5 and the right half shell 6. Laterally protruding plug-in columns 11 are provided on both sides of the bottom cover plate 2, and slots 9 that are plugged and matched with the plug-in columns 11 are provided on the inner side walls of the left half shell 5 and the right half shell 6. A threaded hole 12 is provided on the end surface of the plug-in column 11 opposite to the left half shell 5 or the right half shell 6. The outer walls of the left half shell 5 and the right half shell 6 are both provided with bolt holes 7 connected to the bottom of the slot 9. When the left half shell 5 and the right half shell 6 are connected together, the plug-in column 11 is inserted into the corresponding slot 9, so that the bolt hole 7 and the threaded hole 12 are connected to each other. Bolts are provided between the bottom cover plate 2 and the left half shell 5 and the right half shell 6 on both sides, passing through the bolt holes 7 and threadedly connected with the threaded holes 12, so that the bottom cover plate 2 is fixedly connected with the left half shell 5 and the right half shell 6 on both sides.

[0051] Preferably, both sides of the bottom cover plate 2 are provided with a connecting seat 10 extending upward, and the plug-in column 11 is set on the connecting seat 10. The inner wall of the left half shell 5 and the right half shell 6 is provided with an inwardly convex boss 8, and the slot 9 is opened on the boss 8. By setting the boss 8, the wall thickness of the left half shell 5 and the right half shell 6 does not need to be too thick.

[0052] Figure 4 As shown, preferably, the opening includes a bottom opening 15 provided on the bottom surface of the casing 1 and a side opening 16 provided on the front side surface of the casing 1, the bottom opening 15 is connected with the side opening 16 to form the opening at the bottom of the casing 1, the bottom cover plate 2 includes a bottom plate 13 covering the bottom opening 15 and a side plate 14 covering the side opening 16, the side plate 14 extends upward from the front end of the bottom plate 13, and the side plate 14 and the bottom plate 13 are integrally formed.

[0053] The controller 18 is installed in the inner cavity, and a heat conductor 17 for heat conduction is provided between the controller 18 and the bottom cover plate 2. The controller 18 is attached to the heat conductor 17, and the heat conductor 17 is attached to the bottom cover plate 2. The heat generated by the controller 18 when working can be conducted to the bottom cover plate 2 through the heat conductor 17, and then dissipated through the aluminum bottom cover plate 2 to meet the heat dissipation requirements of the controller 18 and improve the life of the controller 18. In addition, the aluminum bottom cover plate 2 is light in weight and low in cost.

[0054] The aluminum bottom cover plate 2 may be made of pure aluminum or an aluminum alloy.

[0055] Figure 4 As shown, preferably, a flat outer surface is formed on the outer side of the bottom cover plate 2 and is exposed to the outside, and the outer surface is used to dissipate heat to the outside.

[0056] Alternatively, in another solution, a plurality of heat dissipation fins are formed on the outer surface of the bottom cover plate 2 exposed to the outside, and the heat dissipation fins increase the heat dissipation area of ​​the bottom cover plate 2, so that the bottom cover plate 2 has a better heat dissipation effect. This structure is not shown in the drawings.

[0057] Fig. 9 , Fig.10 As shown, preferably, the controller 18 and the heat conductor 17 are combined into a whole, and a receiving groove 22 is provided on the inner side of the bottom cover plate 2. The whole is at least partially arranged in the receiving groove 22 and abuts against the bottom cover plate 2, which not only plays a role in better arranging the controller 18 and the heat conductor 17, but also enables the heat generated by the controller 18 to be better transferred to the bottom cover plate 2.

[0058] Preferably, the heat conducting member 17 is an aluminum heat conducting member, and the heat conducting member 17 may be made of pure aluminum or an aluminum alloy.

[0059] Preferably, the controller 18 is fixed to the heat conducting member 17 by screws.

[0060] Figure 2 As shown, an air inlet 4 connected to the inner cavity is provided on the side of the casing 1, and an air outlet 3 connected to the inner cavity is provided on the bottom cover plate 2. External air can enter the casing 1 from the air inlet 4 and be discharged from the air outlet 3 on the bottom cover plate 2. When the external air passes through the inner cavity, it takes away the heat generated by the controller 18.

[0061] Figure 5-Figure 8 As shown, a driving motor 21 and a cooling fan 23 are installed in the inner cavity. The cooling fan 23 is connected to the driving motor 21. When the cooling fan 23 rotates, an airflow is formed which enters the inner cavity from the air inlet 4 and is discharged from the air outlet 3.

[0062] Preferably, an air guide hood 19 is sleeved on the outer side of the driving motor 21 and the cooling fan 23, and one end of the air guide hood 19 has a hood opening 20 for supplying air to the interior, and a side opening 24 is opened on the side wall of the air guide hood 19. The cooling fan 23 is located on the side of the driving motor 21 away from the hood opening 20. The cooling fan 23 takes in air axially and discharges air radially. A guide ring 27 with a spacing from small to large is formed between the inner wall of the air guide hood 19 and the outer ring of the cooling fan 23, and the large-mouthed end of the guide ring 27 is connected to the side opening 24, and the side opening 24 is connected to the air outlet 3. When the cooling fan 23 rotates, external air enters the inner cavity from the air inlet 4, and the air entering the inner cavity takes away part of the heat on the controller 18. Then, the air entering the inner cavity enters the air guide hood 19 from the hood opening 20, passes through the driving motor 21, and is driven by the cooling fan 23 to flow along the guide ring 27, and is discharged from the air guide hood 19 through the side opening 24 from the large-mouthed end of the guide ring 27. The air discharged from the air guide hood 19 is discharged from the inner cavity from the air outlet 3.

[0063] Preferably, the top of the heat conductor 17 has a groove 25, and the controller 18 is placed in the groove 25 and combined with the heat conductor 17 to form the above-mentioned whole. When the heat conductor 17 and the controller 18 are placed in the receiving groove 22 on the inner side of the bottom cover 2, the side wall of the heat conductor 17 is in contact with the inner wall of the receiving groove 22, and the bottom of the heat conductor 17 is in contact with the bottom of the receiving groove 22, thereby increasing the area where the heat conductor 17 is in contact with the bottom cover 2, so that the heat can be conducted to the bottom cover 2 faster, and the controller 18 is located above the heat conductor 17, and the airflow formed by the rotation of the fan in the inner cavity can directly contact the controller 18 to take away part of the heat on the controller 18.

[0064] Preferably, a plurality of heat-conducting strips 26 are provided on the bottom of the heat-conducting member 17 which is in contact with the bottom cover plate 2 , and there is a spacing between adjacent heat-conducting strips 26 .

[0065] Preferably, the heat conducting member 17 is fixed to the bottom cover plate 2 by screws, or is limited in the accommodating groove 22 by a limiting structure.

[0066] The air guide cover 19 is arranged directly above the controller 18 .

[0067] The above is an introduction to the heat dissipation structure of the controller of the electric chain saw provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A heat dissipation structure of a controller for an electric chain saw, characterized in that: It includes a casing, an aluminum bottom cover and a controller. The bottom cover is installed at the bottom of the casing. The bottom cover and the casing are combined to form an inner cavity. The side of the casing is provided with an air inlet connected to the inner cavity. The bottom cover is provided with an air outlet connected to the inner cavity. The controller is installed in the inner cavity, and the controller is attached to the bottom cover.

2. The heat dissipation structure of the controller of the electric chain saw according to claim 1, characterized in that: An accommodating groove is provided on the inner side of the bottom cover plate, and the controller is at least partially arranged in the accommodating groove and abuts against the bottom cover plate.

3. The heat dissipation structure of the controller of the electric chain saw according to claim 1, characterized in that: A plurality of heat dissipation fins are formed on the outer surface of the bottom cover plate exposed to the outside.

4. The heat dissipation structure of the controller of the electric chain saw according to claim 1, characterized in that: The outer side of the bottom cover plate is formed with a flat outer surface exposed to the outside.

5. The heat dissipation structure of the controller of the electric chain saw according to claim 1, characterized in that: A driving motor and a cooling fan are installed in the inner cavity. The cooling fan is connected to the driving motor. When the cooling fan rotates, an air flow is formed which enters the inner cavity from an air inlet and is discharged from an air outlet.

6. A heat dissipation structure of a controller for an electric chain saw, characterized in that: It includes a casing, an aluminum bottom cover and a controller. The bottom cover is installed at the bottom of the casing. The bottom cover and the casing are combined to form an inner cavity. The side of the casing is provided with an air inlet connected to the inner cavity, and the bottom cover is provided with an air outlet connected to the inner cavity. The controller is installed in the inner cavity. A heat-conducting member for heat conduction is provided between the controller and the bottom cover, the controller is abutted against the heat-conducting member, and the heat-conducting member is abutted against the bottom cover.

7. The heat dissipation structure of the controller of the electric chain saw according to claim 6, characterized in that: The controller and the heat conducting member are combined into a whole. A receiving groove is provided on the inner side of the bottom cover. The whole is at least partially placed in the receiving groove and abuts against the bottom cover. A groove is provided on the top of the heat conducting member. The controller is placed in the groove and combined with the heat conducting member to form the whole.

8. The heat dissipation structure of the controller of the electric chain saw according to claim 6, characterized in that: A plurality of heat dissipation fins are formed on the outer surface of the bottom cover plate exposed to the outside.

9. The heat dissipation structure of the controller of the electric chain saw according to claim 6, characterized in that: The outer side of the bottom cover plate is formed with a flat outer surface exposed to the outside.

10. The heat dissipation structure of the controller of the electric chain saw according to claim 6, characterized in that: A driving motor and a cooling fan are installed in the inner cavity. The cooling fan is connected to the driving motor. When the cooling fan rotates, an air flow is formed which enters the inner cavity from an air inlet and is discharged from an air outlet.

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