Rod-type electric tool and electric tool

Abstract

The invention discloses a rod type electric tool and an electric tool. The rod type electric tool comprises a holding part, a brushless motor and a control assembly, the holding part is used for being held by a user, the brushless motor comprises a motor shaft, the motor shaft can move around the axis of the motor, the control assembly is used for controlling operation of the brushless motor, the control assembly comprises a circuit board assembly and circuit elements, and at least one first plane P exists; the first plane P penetrates through the circuit board assembly of the control assembly and the motor axis of the brushless motor, the first plane P and the circuit board assembly intersect at a first line segment AB, and at least part of the projection of the first line segment AB on the motor axis falls on the motor shaft. According to the electric tool, the projection of the first line segment AB intersecting the first plane P and the circuit board assembly on the motor axis is at least partially limited to fall on the motor shaft, so that the arrangement of the brushless motor and the control assembly is more reasonable, the electric tool is compact in structure, and the brushless motor and the control assembly can be conveniently cooled at the same time.

Description

TECHNICAL FIELD

[0001] The present application relates to a power equipment, in particular to a pole electric tool and an electric tool. BACKGROUND

[0002] An electric tool in the related art can be a pole electric tool. The pole electric tool includes a holding portion for a user to hold and an output portion to perform an output work, and the holding portion and the output portion are connected through a connecting rod.

[0003] Taking a wall polisher as an example, the wall polisher is also called a wall grinder, a wall surface polisher, a polishing machine, etc. The wall polisher includes a working head capable of outputting a rotary motion, the working head is in contact with a wall surface, and the wall surface can be made smooth, delicate and flat. The wall polisher further includes a power component for driving the polishing head to rotate. In order to pursue high polishing efficiency, the power component can adopt a high-voltage brushless motor. However, the existing wall polisher usually sets the high-voltage brushless motor at the polishing head portion, and sets the PCB control part for controlling the high-voltage brushless motor in the handle. Thus, not only the center of gravity of the wall polisher is close to one side of the polishing head portion, the user's holding experience is poor, but also the PCB control part is not easy to dissipate heat. In addition, the high-voltage brushless motor itself also generates more heat, and the situation that the wall polisher cannot work normally due to high temperature rise often occurs. If heat dissipation components are arranged at the PCB control part and the high-voltage brushless motor, the structure of the wall polisher will be complex, the weight will be increased, and it is not conducive to the miniaturization of the wall polisher.

[0004] An electric tool in the related art can also be a high-voltage brushless electric tool that adopts a brushless motor and has a large power supply voltage for the electric tool. The high-voltage brushless electric tool includes a brushless motor and a control assembly, and the control assembly occupies a large space. In some cases, the brushless motor and the control assembly are often arranged along an axis in front and back, so that the length of the electric tool is relatively long. In some other cases, the brushless motor and the control assembly are arranged in two independent housings, and the distance between the two housings is relatively far, so as not to affect the size of the housing outside the brushless motor and the control assembly.

[0005] Therefore, how to propose an electric tool with good heat dissipation performance, small size and good user holding experience is a technical problem to be solved at present.

[0006] This part provides background information related to the present application, which may not be prior art. SUMMARY

[0007] An object of the present application is to solve or at least alleviate part or all of the above problems. To this end, the object of the present application is to provide a pole electric tool and an electric tool, which not only has a compact structure, good heat dissipation performance, but also has a good user holding experience.

[0008] To achieve the above object, the application adopts the following technical scheme:

[0009] A pole electric tool comprises a holding part for a user to hold, a brushless motor comprising a motor shaft movable around a motor shaft line, a control assembly for controlling the operation of the brushless motor, the control assembly comprising a circuit board assembly and circuit elements, at least one first plane P passing through the circuit board assembly of the control assembly and the motor shaft line of the brushless motor, the first plane P intersecting the circuit board assembly at a first line segment AB, a projection of the first line segment AB on the motor shaft line at least partially falling on the motor shaft.

[0010] In some embodiments, a holding housing and an output housing are further included, the holding part is formed in the holding housing, the output housing is connected to a working accessory for work, and the holding housing and the output housing are separately provided.

[0011] In some embodiments, the holding housing forms or is connected to a first mounting cavity, and the brushless motor and the control assembly are both mounted in the first mounting cavity.

[0012] In some embodiments, a parting surface P1 is defined, the parting surface P1 passes through the holding housing, and the holding housing is substantially symmetrically distributed along the parting surface P1; a second plane P2 is defined, the second plane P2 is perpendicular to the parting surface P1 and passes through the motor shaft line; and projections of the control assembly and the brushless motor on the second plane P2 at least partially overlap.

[0013] In some embodiments, the output housing forms a second mounting cavity, and the brushless motor and the control assembly are mounted in the second mounting cavity.

[0014] In some embodiments, the pole electric tool is formed with a first heat dissipation air path passing through the surface of the control assembly, and the first heat dissipation air path simultaneously dissipates heat for the brushless motor and the control assembly.

[0015] In some embodiments, the first heat dissipation air path flows through the gap between the brushless motor and the control assembly and flows out of the brushless motor through the air gap of the brushless motor.

[0016] In some embodiments, the pole electric tool further comprises an electromagnetic interference suppression device for suppressing electromagnetic interference, the electromagnetic interference suppression device is provided in the holding housing or the output housing and is independently provided with the control assembly, and a second heat dissipation air path for dissipating heat for the electromagnetic interference suppression device is provided.

[0017] In some embodiments, the pole electric tool further comprises a heat dissipation fan connected to the motor shaft of the brushless motor, and an air outlet is formed on the holding shell opposite to the heat dissipation fan; a first air inlet is formed on the holding shell opposite to the control assembly; and / or the pole electric tool further comprises an electromagnetic interference resistant device, and a second air inlet is formed on the holding shell opposite to the electromagnetic interference resistant device.

[0018] In some embodiments, a human-machine interaction structure is formed on the holding shell, and the human-machine interaction structure comprises a speed control button for controlling the rotating speed of the motor shaft of the brushless motor.

[0019] In some embodiments, the speed control button comprises an acceleration button for controlling the acceleration of the motor shaft and a deceleration button for controlling the deceleration of the motor shaft; and / or the human-machine interaction structure further comprises a gear position indicator for indicating the rotating speed gear position of the pole electric tool.

[0020] In some embodiments, the circuit element comprises at least one of an electronic switch, a rectifier, and a first capacitor; the circuit board assembly comprises at least one circuit board; the electronic switch is provided in plurality and arranged in rows and columns on the circuit board; and / or the first capacitor is provided in plurality and arranged side by side on the circuit board.

[0021] In some embodiments, the pole electric tool further comprises a heat dissipation fan connected to the motor shaft of the brushless motor, and the pole electric tool further comprises an electromagnetic interference resistant device, and the heat dissipation fan is located between the brushless motor and the electromagnetic interference resistant device.

[0022] In some embodiments, the maximum overload power of the brushless motor is greater than or equal to 200W and less than or equal to 2000W; and / or the nominal power of the brushless motor is greater than or equal to 400W and less than or equal to 2000W; and / or the outer diameter of the brushless motor is greater than or equal to 30mm and less than or equal to 90mm; and / or the stack length of the stator lamination of the brushless motor is greater than or equal to 15mm and less than or equal to 45mm; and / or the weight of the brushless motor is greater than or equal to 100g and less than or equal to 800g.

[0023] In some embodiments, when the motor shaft is arranged horizontally, the control assembly is located above the brushless motor, and a heat dissipation gap is formed between the control assembly and the brushless motor for the heat dissipation airflow to flow through.

[0024] An electric power tool comprises: a handle for a user to hold; a brushless motor comprising a motor shaft movable about a motor shaft axis; a control assembly for controlling operation of the brushless motor, the control assembly comprising a circuit board assembly and circuit elements; a supply voltage for powering the electric power tool is greater than or equal to 80 V; the motor shaft axis does not pass through the control assembly, and a minimum distance L between the control assembly and the brushless motor is less than or equal to 80 mm.

[0025] In some embodiments, there is at least one first plane P passing through the circuit board assembly of the control assembly and the motor shaft axis of the brushless motor, the first plane P intersects the circuit board assembly at a first line segment AB, a projection of the first line segment AB on the motor shaft axis falls at least partially on the motor shaft.

[0026] In some embodiments, the first line segment AB has two end points, a first end A and a second end B, a projection of the first end A on the motor shaft axis is a first projection point C, a projection of the second end B on the motor shaft axis is a second projection point D, a line connecting the first projection point C and the second projection point D is a second line segment CD, a distance of the second line segment CD is a first length L1.

[0027] A center point of an end of the motor shaft falling within the second line segment CD is a third end E, a distance ED between the third end E and the second projection point D is a second length L2, a first overlap rate R1 is defined as a ratio of the second length L2 to the first length L1, and the first overlap rate R1 is greater than or equal to 40%.

[0028] In some embodiments, the first overlap rate R1 is greater than or equal to 60%.

[0029] In some embodiments, a center point of an end of a stator lamination of the brushless motor falling within the second line segment CD is a fourth end F, a distance FD between the fourth end F and the second projection point D is a third length L3, a second overlap rate R1 is defined as a ratio of the third length L3 to the first length L1, and the second overlap rate R2 is greater than or equal to 20%.

[0030] The present application has the following advantages:

[0031] The electric tool provided in the application comprises a holding part, a brushless motor and a control assembly, the holding part is used for a user to hold, the brushless motor comprises a motor shaft, the motor shaft is movable around a motor shaft line, the control assembly is used for controlling the operation of the brushless motor, the control assembly comprises a circuit board assembly and a circuit element, at least one first plane P passes through the circuit board assembly of the control assembly and the motor shaft line of the brushless motor, the first plane P intersects the circuit board assembly to form a first line segment AB, and a projection of the first line segment AB on the motor shaft line at least partially falls on the motor shaft. The electric tool at least partially limits the projection of the first line segment AB on the motor shaft line on the motor shaft, so that the arrangement of the brushless motor and the control assembly is more reasonable, the electric tool is compact in structure, and the brushless motor and the control assembly can be conveniently cooled at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic view of an electric tool;

[0033] Figure 2 is a schematic view of the electric tool from another perspective;

[0034] Figure 3 is a schematic view of a first installation cavity, a first cooling air path and a second cooling air path;

[0035] Figure 4 is a schematic view of a motor housing and a holding housing of the electric tool;

[0036] Figure 5 is an exploded view of part of the structure of the electric tool;

[0037] Figure 6 is a schematic view of a first plane P, a first line segment AB and a brushless motor;

[0038] Figure 7 is a schematic view of part of the structure of the electric tool;

[0039] Figure 8 is a schematic view of a parting surface P1;

[0040] Figure 9 is a schematic view of a second plane P2;

[0041] Figure 10 is a schematic view of a control assembly, an anti-electromagnetic interference device and a brushless motor;

[0042] Figure 11 is a front view of the structure shown in Figure 10

[0043] Figure 12 is a top view of the structure shown in Figure 10 ​​

[0044] Figure 13 is a schematic view of a control assembly;

[0045] Figure 14 is a schematic view of an air gap of a brushless motor;

[0046] Figure 15 is a schematic view of a first half shell;

[0047] Figure 16 is a schematic view of an electromagnetic interference resistant device;

[0048] Figure 17 is a schematic view of another power tool;

[0049] Figure 18 is a schematic view of a partial structure of another power tool;

[0050] Figure 19 is a cross-sectional view of a partial structure of another power tool.

[0051] 20, control assembly; 21, circuit board assembly; 211, circuit board; 22, circuit element; 221, electronic switch; 222, rectifier; 223, first capacitor; 24, control box;

[0052] 30, electromagnetic interference resistant device; 31, electromagnetic interference resistant circuit board; 32, second capacitor; 33, resistor; 34, inductor; 35, AC outlet; 36, mounting box;

[0053] 70, holding housing; 70a, first half shell; 70b, second half shell; 701, air outlet; 702, first air inlet; 703, second air inlet; 704, holding portion; 705, first mounting cavity; 706, first heat dissipation air path; 707, second heat dissipation air path; 708, air guide rib; 71, brushless motor; 710, motor housing; 711, motor shaft; 712, motor shaft axis; 713, air gap; 714, stator lamination; 72, working accessory; 73, heat dissipation fan; 74, human-machine interaction structure; 741, acceleration button; 742, deceleration button; 743, gear indicator light; 75, first bearing; 76, second bearing; 77, output housing;

[0054] 81, connecting rod; 82, hose; 83, flexible shaft. DETAILED DESCRIPTION

[0055] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described accompanying drawings.

[0056] In this application, the terms "include", "comprise" or "have" or any other variations thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that include a list of elements are not limited to those elements, but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without more limitations, an element defined by the statement "including a..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0057] In this application, the term "and / or", is a description of an associated relationship with the associated object, which means that there can be three kinds of relationships. For example, A and / or B, can represent: A exists alone, A and B exist together, B exists alone, these three cases. In addition, the character " / " in this application generally represents that the front and rear associated objects are a "and / or" relationship.

[0058] In this application, the terms "connection", "combination", "coupling", "mounting" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. Among them, for example, direct connection refers to the connection of two parts or components without the need for an intermediate part, indirect connection refers to the connection of two parts or components with at least one intermediate part, and the connection of the two parts or components through the intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0059] In this application, those of ordinary skill in the art will understand that the relative terms used in connection with quantities or conditions (for example, "about", "approximately", "substantially" and the like) include the values described and have the meaning indicated by the context. For example, the relative terms at least include the degree of error related to the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. related to a specific value. Such terms should also be considered to disclose the range defined by the absolute values of the two endpoints. The relative term can refer to a certain percentage (for example, 1%, 5%, 10% or more) of the indicated value. The numerical value without the relative term should also be disclosed as a specific value with a tolerance. In addition, "substantially" when expressing the relative angular positional relationship (for example, substantially parallel, substantially perpendicular), can refer to a certain degree (for example, 1 degree, 5 degrees, 10 degrees or more) added or subtracted from the indicated angle.

[0060] In this application, those of ordinary skill in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or multiple parts in combination.

[0061] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as limiting the embodiments of the present application. In addition, it is also understood in the context that when referring to an element connected to another element "on" or "under", it can be directly connected to another element "on" or "under" or indirectly connected to another element "on" or "under" through an intermediate element. It should also be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the directly below, left below, right below, front below and back below, etc.

[0062] In the present application, the terms "controller", "processor", "central processing unit", "CPU", "MCU" can be interchangeable. When using a unit "controller", "processor", "central processing unit", "CPU", or "MCU" to perform a specific function, unless otherwise specified, these functions can be performed by a single unit or multiple units.

[0063] In the present application, the terms "device", "module" or "unit" can be realized by hardware or software to achieve a specific function.

[0064] In the present application, the terms "calculate", "judge", "control", "determine", "identify" and the like refer to the operation and process of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0065] The present application provides an electric power tool, in some embodiments, as shown in Figure 1 The electric power tool is a grinding tool capable of performing grinding work, such as a wall grinder, a polisher, a sander or an angle grinder, with a grinding disc as a work attachment 72. Of course, in addition to the wall grinder, the work attachment 72 can be replaced by a saw blade, a cutting blade, a cutting rope, a drill bit and a screwdriver, so that the electric power tool becomes a tool capable of performing other work, such as an impact drill, an electric screwdriver, an electric cutter, etc.

[0066] In one embodiment, the electric power tool can be a handheld electric power tool; in a parallel embodiment, as shown in Figure 1 In addition to the work attachment 72, the electric power tool can also include a holding portion 704 for the user to hold, a connecting rod 81 and a working head for installing the work attachment 72 and outputting work, and the electric power tool can be a rod type electric power tool connecting the working head and the holding portion 704 through the connecting rod 81; in a parallel embodiment, as shown in Figure 2As shown, the power tool includes, in addition to the working attachment 72, a holding portion 704 for a user to hold, and a working head for mounting the working attachment 72 and outputting work. The power tool can also be a power tool in which the working head and the holding portion 704 are separately provided.

[0067] In an embodiment, the shortest straight-line distance T between the working attachment 72 mounted on the working head and the holding portion 704 is greater than or equal to 50 cm; in an embodiment, the shortest straight-line distance T between the working attachment 72 mounted on the working head and the holding portion 704 is greater than or equal to 60 cm; in an embodiment, the shortest straight-line distance T between the working attachment 72 mounted on the working head and the holding portion 704 is greater than or equal to 70 cm; in an embodiment, the shortest straight-line distance T between the working attachment 72 mounted on the working head and the holding portion 704 is greater than or equal to 80 cm; in an embodiment, the shortest straight-line distance T between the working attachment 72 mounted on the working head and the holding portion 704 is greater than or equal to 90 cm; in an embodiment, the shortest straight-line distance T between the working attachment 72 mounted on the working head and the holding portion 704 is greater than or equal to 100 cm.

[0068] In an embodiment, the link length M of the connecting rod 81 of the power tool is greater than or equal to 20 cm; in an embodiment, the link length M of the connecting rod 81 of the power tool is greater than or equal to 30 cm; in an embodiment, the link length M of the connecting rod 81 of the power tool is greater than or equal to 40 cm; in an embodiment, the link length M of the connecting rod 81 of the power tool is greater than or equal to 50 cm; in an embodiment, the link length M of the connecting rod 81 of the power tool is greater than or equal to 60 cm; in an embodiment, the link length M of the connecting rod 81 of the power tool is greater than or equal to 70 cm; in an embodiment, the link length M of the connecting rod 81 of the power tool is greater than or equal to 80 cm; in an embodiment, the link length M of the connecting rod 81 of the power tool is greater than or equal to 90 cm; in an embodiment, the link length M of the connecting rod 81 of the power tool is greater than or equal to 100 cm.

[0069] Hereinafter, with continued reference to Figures 1 to 19 As shown, the power tool includes, in addition to the working attachment 72, a holding portion 704 for a user to hold, and a working head for mounting the working attachment 72 and outputting work. The power tool can also be a power tool in which the working head and the holding portion 704 are separately provided.

[0070] The electric power tool further comprises a hose 82, one end of which is connected to the polishing head, and the other end of which forms a dust outlet, through which dust generated during polishing of the polishing head can be sucked and finally discharged from the entire device. In one embodiment, in order to improve the structural compactness and aesthetics of the electric power tool, the connecting rod 81 is provided in a hollow structure, and the hose 82 is arranged through the connecting rod 81. The structure of the working accessory 72 is known in the art, and will not be described in detail here.

[0071] The electric power tool further comprises a main body structure, which comprises the holding shell 70, the brushless motor 71 and the control assembly 20. The holding shell 70 is the main appearance part of the electric power tool, and a holding portion 704 is formed on the holding shell 70 for a user to hold.

[0072] In some embodiments, as shown in Figure 2 and Figure 3 , in addition to forming the holding portion 704, the holding shell 70 further forms a first mounting cavity 705 inside, which is used to mount the brushless motor 71 and the control assembly 20. As shown in Figure 5 , in some embodiments, the holding shell 70 comprises a first half shell 70a and a second half shell 70b, which can be integrally formed or formed by splicing multiple parts. The first half shell 70a and the second half shell 70b can be arranged side by side in the left-right direction of the electric power tool, or arranged side by side in the up-down direction or the front-rear direction of the electric power tool. The inner wall surface of the first half shell 70a and the inner wall surface of the second half shell 70b are spliced to form the first mounting cavity 705, and the control assembly 20 and the brushless motor 71 are mounted between the first half shell 70a and the second half shell 70b. In one embodiment, in the front-rear direction of the electric power tool, the holding portion 704 is formed on the rear side of the first mounting cavity 705. In one embodiment, an anti-slip structure is provided on the holding portion 704 to improve the stability of the user holding the holding portion 704, which can be an anti-slip rubber sleeve, anti-slip lines, etc.

[0073] In some parallel embodiments, as shown in Figure 4 , the main body structure further comprises a motor shell 710, which is connected to the holding shell 70. The holding shell 70 only has the function of forming the holding portion 704, while the first mounting cavity 705 is formed in the motor shell 710, which is used to mount the brushless motor 71 and the control assembly 20. That is, the holding shell 70 can directly form the first mounting cavity 705, or can be connected to the motor shell 710 which forms the first mounting cavity 705. In one embodiment, the motor shell 710 is integrally formed with the holding shell 70; in another embodiment, the motor shell 710 and the holding shell 70 are respectively formed and then connected together.

[0074] Of course, the brushless motor 71 and the control assembly 20 can be installed in a second installation cavity formed by other components instead of the first installation cavity 705. In some embodiments, the power tool further comprises an output housing 77 for connecting to a working accessory 72 for operation, and the second installation cavity is formed in the output housing 77. Such an arrangement allows the brushless motor 71 and the control assembly 20 to be disposed close to the working accessory 72, which not only helps to lower the center of gravity of the power tool, thereby reducing the user's operating strength, but also improves the stability of the power tool when it is leaned against a wall. In an embodiment, the holding housing 70 and the output housing 77 are separately provided.

[0075] When the brushless motor 71 is disposed in the output housing 77, since the output housing 77 is directly connected to the working accessory 72, the motor shaft 711 of the brushless motor 71 can be directly connected to the working accessory 72 and drive the working accessory 72 to move. Of course, in addition to direct connection, a speed reduction assembly, which can be a speed reduction gear box, can be provided between the motor shaft 711 and the working accessory 72, and the rotational speed output by the motor shaft 711 of the brushless motor 71 is reduced by the speed reduction assembly before driving the working accessory 72. When the brushless motor 71 is disposed in the holding housing 70, since the holding housing 70 is far away from the working accessory 72, the motor shaft 711 of the brushless motor 71 can be connected to the working accessory 72 through a flexible shaft 83, as shown. Figure 5

[0076] The brushless motor 71 is the power component of the power tool, and the brushless motor 71 comprises a motor shaft 711 capable of outputting rotational motion, the motor shaft 711 is supported by a first bearing 75 and a second bearing 76 and can move around a motor shaft line 712, which is the rotational axis of the motor shaft 711. The control assembly 20 is used to control the operation of the brushless motor 71, and the control assembly 20 comprises a control box 24 and a circuit board assembly 21 and circuit elements 22 located in the control box 24. It should be noted that the motor shaft line 712 mentioned in the present application refers to a straight line extending to both ends indefinitely.

[0077] Continuing to refer to Figure 6 ​As shown, there is at least one first plane P intersecting the circuit board assembly 21 of the control assembly 20 and the motor axis 712 of the brushless motor 71, and the first plane P intersects the circuit board assembly 21 at a first line segment AB, and the projection of the first line segment AB on the motor axis 712 at least partially falls on the motor axis 711. Compared with the brushless motor and the control assembly arranged in front and back along an axis in the prior art, the electric tool provided by the embodiment of the application makes the arrangement of the brushless motor 71 and the control assembly 20 more reasonable, so as to not only make the electric tool compact, but also facilitate heat dissipation of the brushless motor 71 and the control assembly 20 at the same time. In an embodiment, the projection of the first line segment AB on the motor axis 712 partially falls on the motor axis 711; in another embodiment, the projection of the first line segment AB on the motor axis 712 entirely falls on the motor axis 711.

[0078] Continuing to refer to Figure 6 As shown, the two endpoints of the first line segment AB are a first end A and a second end B, the projection of the first end A on the motor axis 712 is a first projection point C, the projection of the second end B on the motor axis 712 is a second projection point D, the line connecting the first projection point C and the second projection point D is a second line segment CD, and the distance of the second line segment CD is a first length L1. The center point of one end of the motor axis 711 falling in the second line segment CD is a third end E, and the distance ED between the third end E and the second projection point D is a second length L2. It should be noted that the third end can also be defined as: the endpoint of the second line segment CD compared with the third projection point E.

[0079] The first overlap rate R1 is defined as the ratio of the second length L2 to the first length L1. In an embodiment, the first overlap rate R1 is greater than or equal to 40%. In an embodiment, the first overlap rate R1 is greater than or equal to 20%. In an embodiment, the first overlap rate R1 is greater than or equal to 50%. In an embodiment, the first overlap rate R1 is greater than or equal to 60%. In an embodiment, the first overlap rate R1 is greater than or equal to 70%. In an embodiment, the first overlap rate R1 is greater than or equal to 80%. In an embodiment, the first overlap rate R1 is 100%.

[0080] Continuing to refer to Figure 6 As shown, the center point of one end of the stator lamination 714 of the brushless motor 71 falling in the second line segment CD is a fourth end F, and the distance FD between the fourth end F and the second projection point D is a third length L3.

[0081] The second overlap rate R1 is defined as the ratio of the third length L3 to the first length L1. In one embodiment, the second overlap rate R2 is greater than or equal to 20%. In one embodiment, the second overlap rate R2 is greater than or equal to 50%. In one embodiment, the second overlap rate R2 is greater than or equal to 60%. In one embodiment, the second overlap rate R2 is greater than or equal to 70%. In one embodiment, the second overlap rate R2 is greater than or equal to 80%. In one embodiment, the second overlap rate R2 is 100%.

[0082] Continue to refer to, for example Figures 7 to 12 As shown, a plane is defined as the parting surface P1, which passes through the gripping housing 70 and the gripping housing 70 is basically symmetrically distributed along the parting surface P1. A plane is also defined as the second plane P2, which is perpendicular to the parting surface P1 and passes through the motor axis 712. The projections of the control component 20 and the brushless motor 71 on the second plane P2 at least partially overlap.

[0083] This power tool mounts both the brushless motor 71 and the control component 20 within the first mounting cavity 705 of the grip housing 70 or the motor housing 710. This centralized arrangement of the brushless motor 71 and the control component 20, compared to the prior art where the motor is positioned near the grinding head of a tile grinder, brings the center of gravity of the power tool closer to the grip 704, improving the user's grip experience. Furthermore, by defining the projections of the control component 20 and the brushless motor 71 onto the second plane P2 as at least partially overlapping, the power tool has a compact structure, facilitating simultaneous heat dissipation for both the brushless motor 71 and the control component 20. This improves both heat dissipation and the overall compactness of the power tool.

[0084] To reflect the degree of overlap between the control component 20 and the brushless motor 71, the overlap rate is defined as the ratio of the area of ​​the overlapping portion of the control component 20 and the brushless motor 71 to the total area of ​​the control component 20. In some embodiments, this overlap rate is greater than or equal to 10%. In one embodiment, the overlap rate is 10%; in another embodiment, it is 20%; in yet another embodiment, it is 30%; in one embodiment, it is 40%; in another embodiment, it is 50%; and in yet another embodiment, it is 60%.

[0085] In some embodiments, from such Figure 11 The A-direction observation control component 20 and the brushless motor 71 shown in the diagram have at least partial overlap; in some embodiments, from such... Figure 11 The B-direction observation control component 20 and the brushless motor 71 shown in the diagram have at least partial overlap; in some embodiments, from such...Figure 11 At least partial overlap exists for both the control assembly 20 and the brushless motor 71 when viewed in the A-direction and the B-direction as indicated in the middle.

[0086] The brushless motor 71, as the power component of the power tool, has the advantages of high efficiency, small size, high durability, low electrical noise, smooth operation, wide speed regulation range, low interference, smooth speed regulation, high control precision, etc.

[0087] In some embodiments, the overload maximum power of the brushless motor 71 is greater than or equal to 200W and less than or equal to 2000W. In one embodiment, the overload maximum power of the brushless motor 71 is 200W; in one embodiment, the overload maximum power of the brushless motor 71 is 750W; in one embodiment, the overload maximum power of the brushless motor 71 is 1000W.

[0088] In some embodiments, the nominal power of the brushless motor 71 is greater than or equal to 400W and less than or equal to 2000W. In one embodiment, the nominal power of the brushless motor 71 is 800W; in one embodiment, the nominal power of the brushless motor 71 is 1000W; in one embodiment, the nominal power of the brushless motor 71 is 1200W.

[0089] In some embodiments, the outer diameter of the brushless motor 71 is greater than or equal to 30mm and less than or equal to 90mm. In one embodiment, the outer diameter of the brushless motor 71 is 45mm; in one embodiment, the outer diameter of the brushless motor 71 is 55mm; in one embodiment, the outer diameter of the brushless motor 71 is 65mm; in one embodiment, the outer diameter of the brushless motor 71 is 70mm.

[0090] In some embodiments, the stack length of the stator lamination 714 of the brushless motor 71 is greater than or equal to 15mm and less than or equal to 45mm. In one embodiment, the stack length of the stator lamination 714 of the brushless motor 71 is 30mm; in one embodiment, the stack length of the stator lamination 714 of the brushless motor 71 is 35mm; in one embodiment, the stack length of the stator lamination 714 of the brushless motor 71 is 40mm.

[0091] In some embodiments, the weight of the brushless motor 71 is greater than or equal to 100g and less than or equal to 800g. In one embodiment, the weight of the brushless motor 71 is 250g; in one embodiment, the weight of the brushless motor 71 is 300g; in one embodiment, the weight of the brushless motor 71 is 350g, in one embodiment, the weight of the brushless motor 71 is 400g; in one embodiment, the weight of the brushless motor 71 is 450g; in one embodiment, the weight of the brushless motor 71 is 500g.

[0092] As Figure 13As shown, the control assembly 20 is used to control the brushless motor 71, and in some embodiments, the circuit board assembly 21 comprises at least one circuit board 211, and the circuit elements 22 are integrated on the circuit board 211. In some embodiments, according to the shape and size of the first mounting cavity 705, the circuit board 211 is arranged at an angle with the axial direction of the motor shaft 711, and in one embodiment, the angle is an acute angle; in one embodiment, the angle is a right angle, i.e., the circuit board 211 is arranged perpendicular to the axial direction of the motor shaft 711.

[0093] In some embodiments, the circuit board assembly 21 comprises two circuit boards 211, i.e., a first circuit board and a second circuit board which are electrically connected to each other, and the first circuit board and the second circuit board are arranged substantially in parallel, and as viewed from a direction perpendicular to the first circuit board, the first circuit board and the second circuit board at least partially overlap, and the area of the first circuit board is greater than or equal to the area of the second circuit board. By arranging two circuit boards, different types of circuit elements 22 can be electrically connected to different circuit boards 211, and such arrangement reduces the space occupied by the control assembly 20, which is conducive to the miniaturization of the power tool.

[0094] In some embodiments, the circuit elements 22 comprise at least one of an electronic switch 221, a rectifier 222, and a first capacitor 223. In one embodiment, the circuit elements 22 comprise the electronic switch 221, the rectifier 222, and the first capacitor 223, and the electronic switch 221, the rectifier 222, and the first capacitor 223 are integrated on one circuit board 211.

[0095] In some embodiments, the electronic switch 221 is arranged in a row-column arrangement on the circuit board 211. The plurality of electronic switches 221 are used to drive the brushless motor 71 to operate, and specifically, the plurality of electronic switches 221 constitute a three-phase bridge circuit, and the rectifier 222 constitutes a direct current unit for receiving alternating current input from the alternating current input line and outputting a direct current bus voltage, i.e., for converting alternating current input through the alternating current input line into pulsating direct current output. The circuit elements 22 further comprise a control module for controlling the conduction state of the plurality of electronic switches 221, thereby driving the brushless motor 71 to operate normally, and in some embodiments, the control module is implemented by a control chip.

[0096] In some embodiments, the electronic switch 221 is perpendicular to the circuit board 211. In some embodiments, the electronic switch 221 is an IGBT, which stands for an Insulated Gate Bipolar Transistor; in some embodiments, the electronic switch 221 is a MOS; and in some embodiments, the electronic switch 221 is a FET, which stands for a Field Effect Transistor.

[0097] In some embodiments, the plurality of electronic switches 221 are regularly arranged on the circuit board 211, for example, in a row-column arrangement or a ring arrangement. In one embodiment, six electronic switches 221 are provided, and the six electronic switches 221 are arranged in two rows and three columns.

[0098] The first capacitors 223 are thin-film capacitors. In some embodiments, a plurality of first capacitors 223 are provided and arranged side by side on the circuit board 211. In one embodiment, three first capacitors 223 are provided and arranged in a row on the circuit board 211 and side by side with the six electronic switches 221 in the length direction of the circuit board 211. The rectifier 222 is arranged side by side with the three first capacitors 223 in the length direction of the circuit board 211. Of course, in other embodiments, the number of electronic switches 221 and first capacitors 223 can be flexibly adjusted according to requirements.

[0099] In some embodiments, the control assembly 20 further comprises a control box 24 for mounting the circuit board assembly 21 and the circuit element 22, so that the control assembly 20 is integrated as a whole to facilitate assembly. The specific assembly process is as follows: first, integrate the circuit board assembly 21 and the circuit element 22 together, then place the integrated body in the control box 24, and finally seal and fix by pouring glue, which not only achieves insulation effect, but also achieves certain heat dissipation.

[0100] The control box 24 is a box-shaped structure with an open top. In one embodiment, the control box 24 is a rectangular box, and of course in other embodiments, the shape of the control box 24 can be adjusted according to the shape of the inner cavity of the shell and the size of the internal space.

[0101] Continuing to refer to Figures 7 to 10 As shown, the holding shell 70 is formed with a human-computer interaction structure 74, which includes a speed control button for controlling the rotation speed of the motor shaft 711 of the brushless motor 71. By triggering the speed control button, the rotation speed of the brushless motor 71 can be changed, so that the working accessory 72 works at different rates. When the working accessory 72 is a polishing head, the polishing head can polish the wall at different polishing speeds.

[0102] In some embodiments, two speed control buttons are provided, one is an acceleration button 741 for controlling the speed up of the motor shaft 711, and the other is a deceleration button 742 for controlling the speed down of the motor shaft 711. In some embodiments, one speed control button is provided, which is the acceleration button 741. When the power tool is started, it starts at the lowest speed gear. By triggering the acceleration button 741, the power tool switches to the speed gear with higher output speed in turn. When the power tool reaches the highest speed gear, the acceleration button 741 is triggered again, and the power tool directly switches to the lowest speed gear, thus forming a control closed loop. Of course, in some parallel embodiments, one speed control button is provided, which is the deceleration button 742. When the power tool is started, it starts at the highest gear. By triggering the acceleration button 741, the power tool switches to the speed gear with lower output speed in turn. When the power tool reaches the lowest speed gear, the acceleration button 741 is triggered again, and the power tool directly switches to the highest speed gear, thus forming a control closed loop.

[0103] In some embodiments, the human-computer interaction structure 74 further includes a gear indication lamp 743 for indicating the speed gear of the power tool. In one embodiment, the number of gear indication lamps 743 is the same as the number of speed gears of the power tool, and one gear indication lamp 743 corresponds to one speed gear, and the speed gear of the power tool is indicated by lighting up a certain gear indication lamp 743. In a parallel embodiment, the number of gear indication lamps 743 is the same as the number of speed gears of the power tool, and the speed gear of the power tool is indicated by lighting up a target number of gear indication lamps 743, for example, when the power tool is at the lowest speed gear, i.e. gear 1, one gear indication lamp 743 is lit; when the power tool is at the highest speed gear, for example, gear 6, six gear indication lamps 743 are lit.

[0104] In order to achieve simultaneous heat dissipation of the brushless motor 71 and the control assembly 20 by using natural wind, continuing to refer to Figure 3 A first heat dissipation air path 706 is formed in the first mounting cavity 705, the first heat dissipation air path 706 passes through the surface of the control assembly 20, and the first heat dissipation air path 706 simultaneously dissipates heat for the brushless motor 71 and the control assembly 20. Such a setting not only ensures that the brushless motor 71 and the control assembly 20 have good heat dissipation effect, but also does not need to additionally set a heat dissipation member, so that the cost and weight of the power tool are not increased. It should be noted that when the brushless motor 71 and the control assembly 20 are arranged in the output housing 77, the first heat dissipation air path 706 can also be arranged in the second mounting cavity.

[0105] In some embodiments, the first heat dissipation air passage 706 flows through the gap between the brushless motor 71 and the control assembly 20, and flows out of the brushless motor 71 through the air gap 713 of the brushless motor 71. This arrangement enables the heat dissipation air flow to pass through the brushless motor 71, and the heat dissipation effect is better. It should be noted that, as shown in Figure 14 the air gap 713 here includes not only the air gap 713 formed by the winding of the brushless motor 71, but also the air gap 713 formed between the stator and the rotor of the brushless motor 71.

[0106] In order to form the inlet and outlet of the first heat dissipation air passage 706, so that air can enter and exit the first mounting cavity 705 or the second mounting cavity, as shown in Figure 3 and Figure 15 a first air inlet 702 and an air outlet 701 are arranged on the holding housing 70, the first air inlet 702 is the inlet of the first heat dissipation air passage 706, and the air outlet 701 is the outlet of the first heat dissipation air passage 706. Of course, when the first heat dissipation air passage 706 is formed in the motor housing 710 or the output housing 77, the first air inlet 702 and the air outlet 701 can also be arranged on the motor housing 710 or the output housing 77.

[0107] In some embodiments, continuing to refer to Figure 10 and Figure 11 the electric tool further comprises a heat dissipation fan 73 connected to the motor shaft 711 of the brushless motor 71, and the heat dissipation fan 73 rotates to generate negative pressure, so that air forms a heat dissipation air flow in the first heat dissipation air passage 706.

[0108] In some embodiments, the first air inlet 702 is arranged on the holding housing 70 opposite to the control assembly 20, and the air outlet 701 is arranged on the holding housing 70 opposite to the heat dissipation fan 73. In some embodiments, the first air inlet 702 is provided with a plurality of first air inlets 702 arranged side by side to increase the air inlet amount. In some embodiments, the air outlet 701 is provided with a plurality of air outlets 701 arranged side by side to increase the air outlet amount.

[0109] In one embodiment, the air outlet 701 is provided with two groups of air outlets 701 arranged on the front and rear sides of the electric tool respectively, and each group of air outlets 701 includes at least one air outlet 701. In one embodiment, the first air inlet 702 is provided with two groups of first air inlets 702 arranged on the front and rear sides of the electric tool respectively, and each group of first air inlets 702 includes at least one first air inlet 702.

[0110] In some embodiments, when the motor shaft 711 is arranged horizontally, the control assembly 20 is located above the brushless motor 71, and a heat dissipation gap for the heat dissipation air flow to pass through is formed between the control assembly 20 and the brushless motor 71.

[0111] Continue to refer to Figure 5 , Figures 10 to 12 As shown, the power tool also includes an electromagnetic interference suppression device 30, which is used to suppress electromagnetic interference.

[0112] like Figure 16 As shown, the electromagnetic interference suppression device 30 includes an electromagnetic interference suppression circuit board 31, a second capacitor 32, a resistor 33, an inductor 34, an AC power socket 35, and a mounting box 36. The second capacitor 32, resistor 33, inductor 34, and AC power socket 35 are all integrated on the electromagnetic interference suppression circuit board 31. The electromagnetic interference suppression circuit board 31, the second capacitor 32, resistor 33, inductor 34, and AC power socket 35 are integrated into one unit and then placed inside the mounting box 36 to facilitate overall installation. In one embodiment, the mounting box 36 is a rectangular box.

[0113] In some embodiments, the electromagnetic interference suppression circuit board 31 is configured as a single-board structure. Of course, in other embodiments, the electromagnetic interference suppression circuit board 31 can also be configured as a multi-board structure as needed. In some embodiments, the electromagnetic interference suppression circuit board 31 is disposed along a direction parallel to the extending direction of the grip portion 704; in some parallel embodiments, the electromagnetic interference suppression circuit board 31 is disposed at an angle relative to the extending direction of the grip portion 704. In some embodiments, the resistor 33 is a power NTC resistor 33, and the inductor 34 is a common-mode inductor 34.

[0114] In some embodiments, the electromagnetic interference suppression device 30 is disposed within the first mounting cavity 705 and is independently disposed from the control component 20. This arrangement allows for more efficient use of the aperture within the first mounting cavity 705, making the electromagnetic interference suppression device 30 and the control component 20 easier to assemble. In one embodiment, the electromagnetic interference suppression device 30 is disposed within the first mounting cavity 705 of the grip housing 70 or the motor housing 710; in another embodiment, the electromagnetic interference suppression device 30 is disposed within the second mounting cavity of the output housing 77.

[0115] In some embodiments, the cooling fan 73 is located between the brushless motor 71 and the electromagnetic interference suppression device 30. This allows more cooling airflow to flow to the brushless motor 71 and the electromagnetic interference suppression device 30, which helps to improve the heat dissipation effect on the brushless motor 71 and the electromagnetic interference suppression device 30.

[0116] In some embodiments, continue to refer to Figure 3 As shown, a second heat dissipation airflow path 707 for dissipating heat from the electromagnetic interference suppressor 30 is formed within the first mounting cavity 705 or the second mounting cavity. This arrangement improves the heat dissipation effect of the electromagnetic interference suppressor 30.

[0117] In some embodiments, to form the inlet of the second heat dissipation air path 707, continuing to refer to Figure 15 As shown in the figure, the second air inlet 703 is arranged on the holding housing 70, the motor housing 710 or the output housing 77. The arrangement of the two air inlets, the first air inlet 702 and the second air inlet 703, is conducive to increasing the heat dissipation effect. In an embodiment, the second air inlet 703 is arranged opposite to the anti-electromagnetic interference device 30 on the holding housing 70, the motor housing 710 or the output housing 77. In some embodiments, the second air inlet 703 is arranged in multiple, and the multiple second air inlets 703 are arranged side by side to improve the air inlet amount. In an embodiment, the second air inlet 703 is arranged in two groups, and each group of the second air inlets 703 includes at least one second air inlet 703.

[0118] It should be noted that in the embodiments of the present application, the first heat dissipation air path 706 and the second heat dissipation air path 707 share the air outlet 701, so that the first heat dissipation air path 706 and the second heat dissipation air path 707 both pass through the brushless motor 71, to further improve the heat dissipation effect on the brushless motor 71. Of course, in other embodiments, the first heat dissipation air path 706 and the second heat dissipation air path 707 can also have independent air outlets 701.

[0119] To limit the flow direction of the heat dissipation airflow in the first installation cavity 705 or the second installation cavity, continuing to refer to Figure 15 As shown in the figure, the air guide ribs 708 are formed on the inner wall surface of the holding housing 70, the motor housing 710 or the output housing 77, and the air guide ribs 708 are arranged according to the required path of the first heat dissipation air path 706 and the second heat dissipation air path 707. It should be noted that the number of the air guide ribs 708 can be flexibly arranged according to requirements, which is not limited here.

[0120] The power tool also includes an alternating current input line (not shown in the figure), and the anti-electromagnetic interference device 30 and the control assembly 20 are located on different sides of the brushless motor 71. The alternating current input line extends into the first installation cavity 705 or the second installation cavity and is arranged close to the anti-electromagnetic interference device 30. Such arrangement makes the wiring of the alternating current input line reasonable, which is conducive to improving the neatness of the wiring in the power tool and reducing the difficulty of subsequent maintenance.

[0121] In an embodiment, a through hole is formed in the housing of the holding housing 70 forming the first installation cavity 705 for the alternating current input line to pass through, and when a user holds the holding portion 704 to operate the power tool, the through hole and the alternating current input line located in the through hole are both located below the holding portion 704. Such arrangement makes the alternating current input line located below the holding portion 704.

[0122] In some embodiments, the overall weight of the power tool is less than or equal to 3.2 kg. In one embodiment, the overall weight of the power tool is 3.2 kg; in one embodiment, the overall weight of the power tool is 3 kg; in one embodiment, the overall weight of the power tool is 2.8 kg; in one embodiment, the overall weight of the power tool is 2.6 kg; in one embodiment, the overall weight of the power tool is 2.5 kg.

[0123] The present application also provides a power tool, which comprises a holding portion 704 for a user to hold, a brushless motor 71 comprising a motor shaft 711 movable about a motor shaft axis 712, and a control assembly 20 for controlling the operation of the brushless motor 71, the control assembly 20 comprising a circuit board assembly 21 and circuit elements 22. It is to be noted that the power tool can have the structure as shown in Figure 1 and Figure 2 The relevant structures have been described above and will not be described here again. Of course, the power tool can also have the structure as shown in Figure 17 and Figure 18 .

[0124] In some embodiments, the power supply voltage for powering the power tool is greater than or equal to 80 V; the motor shaft axis 712 of the brushless motor 71 does not pass through the control assembly 20, and as shown in Figure 19 , the minimum distance L between the control assembly 20 and the brushless motor 71 is less than or equal to 80 mm. Such an arrangement makes the overall arrangement of the power tool compact, not only saving space, but also facilitating the centralized heat dissipation of the brushless motor 71 and the control assembly 20, which can meet the heat dissipation requirements of the brushless motor 71 and the control assembly 20.

[0125] In one embodiment, the power tool is an alternating current type power tool, and the power supply of the power tool is an alternating current power supply. The voltage of the alternating current power supply is often greater than that of the direct current power supply. When the brushless motor is powered by the alternating current power supply, the compactness of the overall arrangement is further improved, the space is further saved, and the heat dissipation requirements of the motor and the control assembly are further met.

[0126] In one embodiment, the power tool is powered by a battery pack (not shown in the figure), and the output voltage of the battery pack is greater than or equal to 80 V.

[0127] In one embodiment, the minimum distance L between the control assembly 20 and the brushless motor 71 is 70mm; in one embodiment, the minimum distance L between the control assembly 20 and the brushless motor 71 is 60mm; in one embodiment, the minimum distance L between the control assembly 20 and the brushless motor 71 is 50mm; in one embodiment, the minimum distance L between the control assembly 20 and the brushless motor 71 is 40mm; in one embodiment, the minimum distance L between the control assembly 20 and the brushless motor 71 is 30mm; in one embodiment, the minimum distance L between the control assembly 20 and the brushless motor 71 is 20mm; in one embodiment, the minimum distance L between the control assembly 20 and the brushless motor 71 is 10mm; in one embodiment, the minimum distance L between the control assembly 20 and the brushless motor 71 is 5mm. It is to be noted that the distance L refers to the minimum distance between any one of the circuit elements 22 or the circuit board assembly 21 of the control assembly 20 and the stator laminations 714 of the brushless motor 71.

[0128] The application also provides a polishing tool, which comprises a holding housing 70, a brushless motor 71, and a control assembly 20. The holding housing 70 forms a first mounting cavity 705, the brushless motor 71 is used to drive the working accessory 72 to move, and the control assembly 20 is used to control the operation of the brushless motor 71. The control assembly 20 comprises a control box 24 and a circuit board assembly 21 and circuit elements 22 located in the control box 24. The brushless motor 71 and the control assembly 20 are both mounted in the first mounting cavity 705. When the motor shaft 711 of the brushless motor 71 is horizontally arranged, the control assembly 20 is located above the brushless motor 71, and a heat dissipation gap is formed between the control assembly 20 and the brushless motor 71 for the heat dissipation airflow to flow through. Such an arrangement makes the polishing tool have good heat dissipation performance.

[0129] In one embodiment, the polishing tool is a wall polisher. It is to be noted that the above-mentioned limitations on the power tool also apply to the polishing tool, and thus are not described herein.

[0130] The basic principles, main features, and advantages of the application are shown and described above. Those skilled in the art should understand that the above-mentioned embodiments do not limit the application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the application.

Claims

1. A lever-type power tool, comprising: The grip (704) is for the user to hold; A brushless motor (71) includes a motor shaft (711) that is movable about a motor axis (712); A control component (20) for controlling the operation of the brushless motor (71), the control component (20) including a circuit board assembly (21) and circuit elements (22); Its features are, There exists at least one first plane P that passes through the circuit board assembly (21) of the control component (20) and the motor axis (712) of the brushless motor (71). The first plane P intersects the circuit board assembly (21) at a first line segment AB, and the projection of the first line segment AB on the motor axis (712) at least partially falls on the motor axis (711).

2. The lever-type power tool according to claim 1, characterized in that, It also includes a gripping housing (70) and an output housing (77), the gripping part (704) being formed in the gripping housing (70), and the output housing (77) being connected to a working attachment (72) for operation, the gripping housing (70) and the output housing (77) being separately provided.

3. The lever-type power tool according to claim 2, characterized in that, The grip housing (70) is formed or connected to the first mounting cavity (705), in which the brushless motor (71) and the control assembly (20) are both mounted.

4. The lever-type power tool according to claim 3, characterized in that, Define a parting surface P1 that passes through the gripping housing (70) and the gripping housing (70) is substantially symmetrically distributed along the parting surface P1; define a second plane P2 that is perpendicular to the parting surface P1 and passes through the motor axis (712); the projections of the control component (20) and the brushless motor (71) on the second plane P2 at least partially overlap.

5. The lever-type power tool according to claim 2, characterized in that, The output housing (77) forms a second mounting cavity, in which the brushless motor (71) and the control assembly (20) are mounted.

6. The lever-type power tool according to claim 3 or 5, characterized in that, The lever-type power tool has a first heat dissipation air path (706) that passes through the surface of the control component (20) and dissipates heat for both the brushless motor (71) and the control component (20).

7. The lever-type power tool according to claim 6, characterized in that, The first heat dissipation airflow (706) flows through the gap between the brushless motor (71) and the control component (20), and flows out of the brushless motor (71) through the air gap (713) of the brushless motor (71).

8. The lever-type power tool according to claim 2, characterized in that, The lever-type power tool also includes an electromagnetic interference suppression device (30), which is used to suppress electromagnetic interference. The electromagnetic interference suppression device (30) is disposed in the grip housing (70) or the output housing (77) and is disposed independently of the control component (20). There is a second heat dissipation air passage (707) for dissipating heat from the electromagnetic interference suppression device (30).

9. The lever-type power tool according to claim 2, characterized in that, The lever-type power tool also includes a cooling fan (73), which is connected to the motor shaft (711) of the brushless motor (71), and an air outlet (701) is formed on the grip housing (70) facing the cooling fan (73); A first air inlet (702) is formed on the grip housing (70) directly opposite the control component (20); And / or, the lever power tool further includes an electromagnetic interference suppression device (30), and a second air inlet (703) is formed on the grip housing (70) directly opposite the electromagnetic interference suppression device (30).

10. The lever-type power tool according to claim 2, characterized in that, The grip housing (70) forms a human-machine interaction structure (74), which includes a speed control button for controlling the rotational speed of the motor shaft (711) of the brushless motor (71).

11. The lever-type power tool according to claim 10, characterized in that, The speed control buttons include an acceleration button (741) for controlling the speed increase of the motor shaft (711) and a deceleration button (742) for controlling the speed decrease of the motor shaft (711); And / or, the human-machine interface structure (74) further includes a gear indicator (743) for indicating the speed gear of the lever power tool.

12. The lever-type power tool according to claim 1, characterized in that, The circuit element (22) includes at least one of an electronic switch (221), a rectifier (222), and a first capacitor (223); The circuit board assembly (21) includes at least one circuit board (211); Multiple electronic switches (221) are provided and arranged in rows and columns on the circuit board (211); And / or, multiple first capacitors (223) are provided and arranged side by side on the circuit board (211).

13. The lever-type power tool according to claim 1, characterized in that, The lever-type power tool also includes a cooling fan (73) connected to the motor shaft (711) of the brushless motor (71). The lever-type power tool also includes an electromagnetic interference suppression device (30), with the cooling fan (73) located between the brushless motor (71) and the electromagnetic interference suppression device (30).

14. The lever-type power tool according to claim 1, characterized in that, The maximum overload power of the brushless motor (71) is greater than or equal to 200W and less than or equal to 2000W; And / or, the nominal power of the brushless motor (71) is greater than or equal to 400W and less than or equal to 2000W; And / or, the outer diameter of the brushless motor (71) is greater than or equal to 30 mm and less than or equal to 90 mm; And / or, the stack length of the stator laminations (714) of the brushless motor (71) is greater than or equal to 15 mm and less than or equal to 45 mm; And / or, the weight of the brushless motor (71) is greater than or equal to 100g and less than or equal to 800g.

15. The lever-type power tool according to claim 1, characterized in that, When the motor shaft (711) is horizontally positioned, the control component (20) is located above the brushless motor (71), and a heat dissipation gap is formed between the control component (20) and the brushless motor (71) for heat dissipation airflow to pass through.

16. An electric tool, comprising: The grip (704) is for the user to hold; A brushless motor (71) includes a motor shaft (711) that is movable about a motor axis (712); A control component (20) for controlling the operation of the brushless motor (71), the control component (20) including a circuit board assembly (21) and circuit elements (22); Its features are, The power supply voltage for the power tool is greater than or equal to 80V; The motor axis (712) does not pass through the control component (20), and the minimum distance L between the control component (20) and the brushless motor (71) is less than or equal to 80 mm.

17. The power tool according to claim 16, characterized in that, There exists at least one first plane P that passes through the circuit board assembly (21) of the control component (20) and the motor axis (712) of the brushless motor (71). The first plane P intersects the circuit board assembly (21) at a first line segment AB, and the projection of the first line segment AB on the motor axis (712) at least partially falls on the motor axis (711).

18. The power tool according to claim 17, characterized in that, The two endpoints of the first line segment AB are the first end A and the second end B, respectively. The projection of the first end A on the motor axis (712) is the first projection point C, and the projection of the second end B on the motor axis (712) is the second projection point D. The line connecting the first projection point C and the second projection point D is the second line segment CD, and the distance of the second line segment CD is the first length L1. The center point of the end of the motor shaft (711) that falls within the second line segment CD is the third end E. The distance ED between the third end E and the second projection point D is the second length L2. The first overlap rate R1 is defined as the ratio of the second length L2 to the first length L1. The first overlap rate R1 is greater than or equal to 40%.

19. The power tool according to claim 18, characterized in that, The first overlap rate R1 is greater than or equal to 60%.

20. The power tool according to claim 18, characterized in that, The center point of the stator lamination (714) of the brushless motor (71) that falls within the second line segment CD is the fourth end F, and the distance FD between the fourth end F and the second projection point D is the third length L3; the second overlap rate R1 is defined as the ratio of the third length L3 to the first length L1, and the second overlap rate R2 is greater than or equal to 20%.

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