Brushless electric tool

Abstract

The invention relates to a brushless electric tool, and the tool comprises a brushless motor which comprises a stator assembly, the stator assembly comprises an outgoing line, and one end of the outgoing line extends to the outer side of the stator assembly; the control panel is used for controlling the operation of the brushless motor; the conductive connecting element is electrically connected with the control panel and is provided with a penetrating hole; wherein one end of the leading-out wire is arranged corresponding to the penetrating hole, one end of the leading-out wire is inserted into the penetrating hole, and the leading-out wire and the penetrating hole are electrically connected. According to the brushless electric tool, the lead-out wire is electrically connected with the conductive connecting element through the conductive connecting element, and the lead-out wire does not need to be bent, so that the assembly efficiency can be improved, the assembly cost can be reduced, the reject ratio of products can be reduced, the service life of the products can be prolonged, and the use safety of the products can be improved.

Description

Technical Field

[0001] This invention relates to the field of power tool technology, and in particular to a brushless power tool. Background Technology

[0002] Brushless power tools are power tools that use brushless motor technology, offering higher efficiency and a longer lifespan. For example... Figure 1a As shown, brushless power tools typically include a main body 1, a handle 2, and a battery holder (not shown) arranged from top to bottom. The handle 1 is equipped with a switch 21. Due to the shape limitations of the shell of brushless power tools, the only areas with a large lateral space are the main body 1 and the battery holder. The main body 1 is mainly used to accommodate the brushless motor 3, and the battery holder is used to accommodate the battery pack. This results in a limitation on the placement of the control board 4. In current brushless power tools, the control board 4 is placed between the brushless motor 3 and the switch 21, which results in a relatively short distance between the brushless motor 3 and the control board 4.

[0003] The brushless motor has three leads, which are enameled wires. These three leads are connected to the control board to establish an electrical connection between the brushless motor and the control board. The connection between the brushless motor and the control board typically includes two connection schemes as follows:

[0004] (1) The lead wires of the brushless motor are led out and directly soldered to the control board;

[0005] (2) Connect the lead wires and the control board using other types of wires (such as silicone wires).

[0006] Regarding the above scheme (1), since the lead wire is relatively stiff, it needs to be bent in a limited space to run smoothly. This requires tooling, shaping, and specific bending equipment, which is time-consuming and labor-intensive. In addition, the lead wire in some brushless power tools needs to be bent multiple times, which can easily damage the lead wire material. Furthermore, the limited space prevents the stress generated by the bending from being released, causing the bent lead wire to press on the control board or brushless motor, thus limiting the application of scheme (1). In the assembly process of brushless power tools, the lead wire of the brushless motor is first bent and then welded to the control board. Then, the brushless motor and the control board are placed together in the housing. The control board is fixed to the housing with multiple screws, and the brushless motor is assembled with the inner wall of the housing through slots and snap-fit ​​protrusions. Figure 1a , Figure 1b and Figure 1c The ideal state of the lead wire 3111 (with a first heat shrink tubing 6 fitted around its outer periphery) after two bends of approximately 90° or exactly 90° is achieved. Figure 1d and Figure 1eThe actual state of the lead wire 3111 after bending is the failure of reshaping due to stress release. In the actual state, the angle of both bends is greater than 90°. This means that when installing the assembled brushless motor and control board into the housing, the actual state needs to be manually adjusted to the ideal state, which increases labor costs and assembly difficulty. Moreover, after the adjusted brushless motor and control board are installed into the housing, the control board is fixed by screws and is firmly assembled, while the brushless motor and housing are assembled by snap-fit. Therefore, under the stress of the lead wire, the brushless motor is prone to detach from the snap-fit ​​of the housing, which may cause safety accidents during subsequent use. In addition, the lead wire in scheme (1) cannot be too long or too short. If the lead wire is too long, it will be bent unnecessarily after being welded to the control board. If the lead wire is too short, it will be pulled after being welded to the control board, resulting in an unstable connection.

[0007] Regarding the above-mentioned scheme (2), the lead wire and silicone wire are generally connected by welding, which increases labor costs and has strength defects. For power tools that generate large vibrations during use (such as impact screwdrivers), the weld between the lead wire and the silicone wire is prone to breakage. In addition, silicone wire is relatively soft and cannot be shaped. During the assembly process, the silicone wire is prone to tangling, requiring manual insertion of each silicone wire into the limited space in the machine housing, resulting in low assembly efficiency. Furthermore, the silicone wire is prone to surface damage due to repeated bending within the limited space, resulting in low effective utilization of parts and low yield. Summary of the Invention

[0008] Based on the aforementioned deficiencies in the prior art, the purpose of this invention is to provide a brushless power tool that electrically connects the lead wire to the conductive connecting element via a conductive connecting element. The lead wire does not need to be bent, and after connecting the lead wire to the conductive connecting element, the lead wire does not exert a biasing force on the conductive connecting element. This avoids the brushless motor from detaching from the housing due to the stress of the lead wire during assembly, thereby improving assembly efficiency, reducing assembly costs, reducing product defect rate, increasing product lifespan, and improving product safety.

[0009] Therefore, the present invention provides the following technical solution.

[0010] This invention provides a brushless power tool, the brushless power tool comprising:

[0011] A brushless motor includes a stator assembly, the stator assembly including windings, one end of a conductor forming the windings directly forming a lead, the lead extending from a lead-out position of the stator assembly to the outside of the stator assembly.

[0012] A control board, which is used to control the operation of the brushless motor;

[0013] A conductive connecting element, one end of which is fixed to the control board, and the other end protruding from the control board and extending toward the lead-out position of the lead-out line in the stator assembly, wherein the lead-out line is directly electrically connected to the conductive connecting element.

[0014] Optionally, after the lead wire is led out along the lead-out position and connected to the conductive connecting element, the lead wire has no bias force on the conductive connecting element.

[0015] Optionally, the conductive connection element is provided with a through hole, and one end of the lead wire extending to the outside of the stator assembly is inserted into the through hole and the two are electrically connected.

[0016] Optionally, the brushless motor includes three leads, and the number of conductive connecting elements is three;

[0017] The three leads are provided in a one-to-one correspondence with the through holes of the three conductive connecting elements, and the first end of the lead is inserted into the through hole corresponding to the position and the two are electrically connected.

[0018] Optionally, the stator assembly further includes a winding frame and a stator core, the winding frame being located at one end of the stator core; the winding frame is provided with a wire-passing groove, and the first end of the lead wire extends out of the wire-passing groove and extends to the outside of the winding frame.

[0019] Optionally, the lead wire extends in a straight line at the portion located between the wire groove and the through hole.

[0020] Optionally, the brushless motor, the conductive connecting element, and the control board are arranged sequentially from top to bottom, with the first end of the lead wire located behind the control board;

[0021] The conductive connecting element has a first connecting segment and a second connecting segment formed at both ends. The through hole is provided on the first connecting segment. The first connecting segment extends backward and upward at an angle to be electrically connected to the lead wire. The second connecting segment extends downward to be electrically connected to the control board.

[0022] Optionally, the conductive connecting element further includes a connecting segment, the two ends of which are respectively connected to the first connecting segment and the second connecting segment;

[0023] The axis of the brushless motor extends horizontally, the control board is horizontally positioned, and at least a portion of the connecting section extends horizontally.

[0024] Optionally, the conductive connecting element is an elastic metal sheet.

[0025] Optionally, the first end of the lead wire is electrically connected to the conductive connecting element by welding;

[0026] And / or, the conductive connection element is electrically connected to the control board by welding;

[0027] And / or, the through hole includes a through hole or a blind hole.

[0028] The present invention has the following technical effects:

[0029] This invention provides a brushless power tool. By configuring a conductive connecting element, the lead wire is connected to the conductive connecting element along its lead-out direction. Thus, during the electrical connection process between the lead wire and the conductive connecting element, the lead wire does not need to be bent, and the lead wire does not exert a biasing force on the conductive connecting element. The lead wire and the control board can form a stable electrical connection system. Furthermore, the conductive connecting element is made of an elastic material. Under continuous vibration, the conductive connecting element can compensate for changes in the relative distance between the lead wire and the control board during vibration through its own deformation, preventing the connection between the lead wire and the control board from being pulled apart under vibration. Moreover, during assembly, whether the length of the lead wire exceeds or does not reach the position of the conductive connecting element will not affect its stable connection with the conductive connecting element. This also improves assembly efficiency, reduces assembly costs, reduces product defect rates, increases product lifespan, and enhances product safety. Attached Figure Description

[0030] Figure 1a This is a partial structural diagram of an ideal brushless power tool in the prior art;

[0031] Figure 1b This is a three-dimensional structural diagram of the ideal assembly of the lead wires and control board in the prior art.

[0032] Figure 1c This is a side view of the ideal assembly structure of the lead wires and control board in the prior art.

[0033] Figure 1d This is a three-dimensional structural diagram of the assembly of the lead wires and control board in the actual state of the prior art.

[0034] Figure 1e This is a side view of the assembly structure of the lead wires and control board in the actual state of the prior art;

[0035] Figure 2 Figure 1 is a partial three-dimensional structural schematic diagram of the brushless power tool of the present invention;

[0036] Figure 3 This is a partial three-dimensional structural diagram of the brushless power tool of the present invention. Figure 2

[0037] Figure 4 This is a partial three-dimensional structural diagram of the brushless power tool of the present invention. Figure 3 ;

[0038] Figure 5 This is a partial exploded view of the brushless power tool of the present invention;

[0039] Figure 6 for Figure 3 Enlarged view of point A in the middle;

[0040] Figure 7 Figure 1 is a schematic diagram of the assembly structure of the stator assembly, control board, conductive connection element and first heat shrink tubing of the present invention;

[0041] Figure 8 This is a schematic diagram of the assembly structure of the stator assembly, control board, conductive connection element, and first heat shrink tubing of the present invention. Figure 2 ;

[0042] Figure 9 This is an exploded view of the assembly structure of the stator assembly, control board, conductive connecting element and first heat shrink tubing of the present invention;

[0043] Figure 10 This is a schematic diagram of the assembly structure of the conductive connecting element and the control board in another embodiment of the present invention.

[0044] Explanation of reference numerals in the attached figures

[0045] 100. Brushless power tools;

[0046] 1. Main body; 11. Receiving part; 12. Snap-fit ​​protrusion;

[0047] 2. Handle; 21. Switch;

[0048] 3. Brushless motor; 31. Stator assembly; 311. Winding; 3111. Lead wire; 312. Winding frame; 3121. Wire guide; 313. Stator core; 3131. Slot; 32. Rotor; 33. Fan;

[0049] 4. Control panel;

[0050] 5. Conductive connecting element; 51. Through hole; 52. First connecting section; 53. Second connecting section; 54. Connecting section;

[0051] 6. First heat shrink tubing. Detailed Implementation

[0052] To make the technical solution and beneficial effects of the present invention more apparent and understandable, a detailed description is provided below by listing specific embodiments. Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0053] In the description of this invention, unless otherwise expressly defined, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this invention and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. That is, they should not be construed as limiting this invention.

[0054] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" can explicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two; "several" means at least one; unless otherwise expressly defined.

[0055] In this invention, unless otherwise explicitly defined, the terms "installation," "connection," "linking," "fixing," and "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral molding; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] In this invention, unless otherwise explicitly defined, the terms "above," "on top of," "over," "above," "below," "below," "below," or "below" for "first feature above second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "over," and "below" for "first feature above second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature below second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0057] The terms "front," "back," "up," and "down" used in this article refer to Figures 1 to 12. Figure 3 The markings in the text shall prevail.

[0058] The following is based on Figures 2 to 10 This invention provides a detailed description of the brushless power tool.

[0059] In this embodiment, such as Figures 2 to 4 As shown, the brushless power tool 100 includes a brushless motor 3, a control board 4, and conductive connection elements 5. The brushless motor 3 includes a stator assembly 31, which includes a winding 311. One end of the wire forming the winding 311 directly forms the lead wire 3111. It should be understood that the winding 31 is typically enameled wire, and the winding 311 and the lead wire 3111 are made of the same material (enameled wire). Figure 6 As shown, the first end of the lead wire 3111 is led out from one lead-out position of the stator assembly 31 and extends to the outside of the stator assembly 31. The control board 4 is used to control the operation of the brushless motor 3. Figures 6 to 9 As shown, one end of the conductive connecting element 5 is fixedly connected to the control board 4, and the other end extends toward the lead-out position of the aforementioned lead-out line 3111. The lead-out line 3111 extends from the aforementioned lead-out position and outwards from the stator assembly 31 before being directly electrically connected to the conductive connecting element 5.

[0060] By adopting the above technical solution, the conductive connecting element 5 extends toward the lead-out position of the lead wire 3111 located in the stator assembly 31. In this way, during the process of connecting the lead wire 3111 to the conductive connecting element 5, the lead wire 3111 can extend in a straight line to the position of the conductive connecting element 5 without bending, or it can be bent at a small angle (1° to 10°). By controlling the bending angle, such bending will not or will not easily damage the material of the lead wire 3111, nor will it apply a bias force to the conductive connecting element 5, causing the snap-fit ​​protrusion on the stator assembly 31 to disengage from the snap-fit ​​groove on the inner wall of the housing, resulting in the brushless motor 3 disengaging from the housing. The lead wire 3111 and the control board 4 can form a stable electrical connection system, which can avoid problems such as poor assembly efficiency, high labor costs, damage to lead wire materials, and easy detachment of brushless motor from the housing caused by bending of lead wire 3111. In other words, by electrically connecting brushless motor 3 and control board 4 through conductive connecting element 5, assembly efficiency can be improved, assembly costs can be reduced, product defect rate can be reduced, product life can be increased, and product safety can be improved.

[0061] By configuring the conductive connecting element 5 and defining the positional relationship between its through hole 51 and the first end of the lead wire 3111, the lead wire 3111 can be inserted into the through hole 51 of the conductive connecting element 5 along its lead-out direction, and then the two are electrically connected by adhesive or other means. With this configuration, after the lead wire 3111 is connected to the conductive connecting element 5, the lead wire 3111 will not have its own deformation stress and will not exert a bias force on the conductive connecting element 5, thus preventing the snap-fit ​​protrusion on the stator assembly 31 from detaching from the snap-fit ​​groove on the inner wall of the housing.

[0062] Furthermore, for different application scenarios with varying spacing between the brushless motor 3 and the control board 4, the conductive connecting element 5 can be bent at different angles or with different numbers of bends to adapt to brushless power tools 100 with different assembly spaces. In addition, compared to existing technologies that use other types of flexible wires (such as silicone wires) for electrical connections, this solution eliminates the need for manual handling and assembly of wire harnesses one by one, avoiding the problem of low yield rates caused by surface damage to the flexible wires.

[0063] In one embodiment, the control board 4 and the conductive connection element 5 are two separate parts. Since the conductive connection element 5 is an independent component, its structure can be modified to adapt to different installation spaces. Thus, the lead wire 3111 of the stator assembly 31 can be led out from the front end or from the rear end. Preferably, since there is more free space below the rear end of the stator assembly 31, the lead wire 3111 is led out from the rear end of the stator assembly 31, which provides more design space for the conductive connection element 5.

[0064] In another embodiment, the control board 4 and the conductive connection element 5 are integrally formed. In order to minimize the size of the control board 4 in the front-rear direction, the lead wire 3111 extends downward from the front end of the stator assembly 31 to be electrically connected to the conductive connection element 5.

[0065] In one implementation, such as Figure 2 and Figure 3 As shown, the brushless power tool 100 also includes a main body 1 and a handle 2. The lower part of the main body 1 extends to form a receiving part 11 for accommodating the control panel 4. The handle 2 is connected to the lower part of the receiving part 11 and is provided with a switch 21.

[0066] In one implementation, such as Figure 7 and Figure 9 As shown, the brushless motor 3 includes three leads 3111 and three conductive connecting elements 5. The three leads 3111 and the three conductive connecting elements 5 are arranged in a one-to-one correspondence with the through holes 51 of the three conductive connecting elements 5. One end of the lead 3111 is inserted into the through hole 51 corresponding to the position and the two are electrically connected.

[0067] Furthermore, the position of the through hole 51 is configured such that the lead wire 3111 is inserted into the corresponding through hole 51, and the lead wire 3111 does not contact the hole wall of the through hole 51, so as to avoid the hole wall of the through hole 51 contacting the lead wire 3111 and forcing the lead wire 3111 to bend or bend.

[0068] Furthermore, the aperture of the through hole 51 is configured such that the lead wire 3111 is inserted into the corresponding through hole 51, and the lead wire 3111 does not contact the hole wall of the through hole 51, so as to avoid the hole wall of the through hole 51 contacting the lead wire 3111 and forcing the lead wire 3111 to bend or bend.

[0069] The following section will take the example of the control board 4 and the conductive connecting element 5 being two independent parts for a detailed explanation.

[0070] In one implementation, such as Figure 5 and Figure 7 As shown, the brushless motor 3 includes a stator assembly 31, a rotor 32, and a fan 33. The stator assembly 31 is fitted around the outer periphery of the rotor 32, and the fan 33 is used to accelerate heat dissipation. The stator assembly 31 also includes a winding 311, a winding frame 312, and a stator core 313. The winding frame 312 is located at one end of the stator core 313, and during winding, the winding frame 312 restricts the winding path at the end of the winding 311. Figure 7 As shown, the winding frame 312 is provided with a wire-passing groove 3121. When the wire is led out, the first end of the lead wire 3111 passes through the wire-passing groove 3121 and extends outward to the outside of the stator assembly 31. The lead wire 3111 is restricted to its lead-out position by the wire-passing groove 3121.

[0071] Furthermore, such as Figures 7 to 9 As shown, the lead wire 3111 extends in a straight line between the wire groove 3121 and the through hole 51, which reduces the stress caused by bending or twisting after the lead wire 3111 extends out.

[0072] In one implementation, such as Figures 7 to 9 As shown, the brushless motor 3, conductive connecting element 5, and control board 4 are arranged sequentially from top to bottom, with the first end of the lead wire 3111 located behind the control board 4. The conductive connecting element 5 has a first connecting segment 52 and a second connecting segment 53 formed at both ends. A through hole 51 is provided on the first connecting segment 52. The first connecting segment 52 extends backward and upward at an angle to electrically connect with the lead wire 3111, and the second connecting segment 53 extends downward to electrically connect with the control board 4. In this design, the first connecting segment 52 extends backward and upward at an angle so that the through hole 51 and the first end of the corresponding lead wire 3111 can be positioned opposite each other. Furthermore, the upward angle of the first connecting segment 52 reduces the distance between the stator assembly 31 and the conductive connecting element 5, thereby reducing the lead-out length of the lead wire 3111.

[0073] Furthermore, such as Figure 7 and Figure 10As shown, the conductive connecting element 5 also includes a connecting section 54, with its two ends connected to the first connecting section 52 and the second connecting section 53, respectively. The axis of the brushless motor 3 extends horizontally, and the control board 4 is horizontally positioned. The connecting section 54 extends horizontally at least partially, which facilitates the compactness of the brushless power tool 100 in the vertical direction. Specifically, when the distance between the lead wire 3111 and the control board 4 in the vertical direction is small, the number of bends in the conductive connecting element 5 is correspondingly reduced, such as... Figure 7 As shown, the conductive connecting element 5 is bent twice, and the connecting section 54 extends horizontally as a whole. When the vertical distance between the lead wire 3111 and the control board 4 is large, the conductive connecting element 5 can be bent more times, such as... Figure 10 As shown, the connecting section 54 is bent to increase the size of the conductive connecting element 5 in the vertical direction so as to achieve electrical connection, while not increasing the space occupied by the conductive connecting element 5 in the front-back direction.

[0074] In one embodiment, when making the electrical connection, the conductive connecting element 5 is first connected to the control board 4 by soldering. Then, the lead wire 3111 is inserted into the through hole 51, and then the first end of the lead wire 3111 is connected to the conductive connecting element 5 by soldering using a soldering process.

[0075] In one embodiment, the conductive connecting element 5 is an elastic metal sheet, the metal material of which includes, but is not limited to, phosphor bronze plated with nickel or copper. In this solution, the conductive connecting element 5 has good bending performance, toughness, and elasticity. It will not deform again after bending. Its toughness can resist the vibration generated by the tool during operation, and its elasticity can buffer the impact inside the tool, thereby preventing the welded parts on the conductive connecting element 5 from breaking due to vibration. When the power tool 100 is working, it is under continuous vibration. The relative distance between the lead wire 3111 and the control board 4 is constantly changing. The lead wire 3111 and the control board 4 are electrically connected by the elastic conductive connecting element 5. The deformation of the conductive connecting element 5 can offset the change in the relative distance between the two, so that the connection between the lead wire 3111, the conductive connecting element 5, and the control board 4 will not fall off due to back and forth pulling under vibration.

[0076] Furthermore, adhesive is applied to the solder joint on the conductive connecting element 5 to improve the stability of the electrical connection and further prevent the lead wire 3111 at the solder joint from breaking or the two components of the electrical connection from separating due to vibration.

[0077] In one implementation, such as Figure 6 and Figure 7As shown, the outer periphery of the three leads 3111 of the stator assembly 31 is respectively fitted with first heat-shrink tubing 6 of different colors for differentiation. After the leads 3111 and the conductive connecting element 5 are electrically connected, the assembly points of the two and the conductive connecting element 5 are fitted with second heat-shrink tubing (not shown in the figure) to prevent short circuits.

[0078] In one embodiment, the through hole 51 includes a through hole or a blind hole, preferably a through hole, to facilitate wire threading.

[0079] In one implementation, such as Figure 5 As shown, the inner wall of the main body 1 is provided with a plurality of snap-fit ​​protrusions 12, which are distributed at intervals along the circumference of the brushless motor 3. The outer wall of the stator core 313 is provided with a plurality of slots 3131, and the plurality of snap-fit ​​protrusions 12 and the plurality of slots 3131 are snapped together one by one to assemble the brushless motor 3 into the main body 1.

[0080] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of the present invention that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of the present invention and do not limit the scope of protection of this patent.

Claims

1. A brushless power tool, characterized in that, The brushless power tool (100) includes: A brushless motor (3) includes a stator assembly (31) including a winding (311) and one end of a wire forming the winding (311) directly forming a lead wire (3111) extending from a lead-out position of the stator assembly (31) to the outside of the stator assembly (31). Control board (4), which is used to control the operation of the brushless motor (3); A conductive connecting element (5) has one end fixed to the control plate (4) and the other end protruding from the control plate (4) and extending toward the lead wire (3111) at the lead-out position of the stator assembly (31). The lead wire (3111) is directly electrically connected to the conductive connecting element (5).

2. The brushless power tool according to claim 1, characterized in that, The lead wire (3111) is led out along the lead-out position and connected to the conductive connecting element (5), and the lead wire (3111) has no bias force on the conductive connecting element (5).

3. The brushless power tool according to claim 2, characterized in that, The conductive connecting element (5) is provided with a through hole (51), and one end of the lead wire (3111) extending to the outside of the stator assembly (31) is inserted into the through hole (51) and the two are electrically connected.

4. The brushless power tool according to claim 1, characterized in that, The brushless motor (3) includes three leads (3111), and the number of conductive connecting elements (5) is three; The three lead wires (3111) are arranged in a one-to-one correspondence with the through holes (51) of the three conductive connecting elements (5). One end of the lead wire (3111) is inserted into the through hole (51) corresponding to the position and the two are electrically connected.

5. The brushless power tool according to claim 1, characterized in that, The stator assembly (31) further includes a winding frame (312) and a stator core (313). The winding frame (312) is located at one end of the stator core (313). The winding frame (312) is provided with a wire slot (3121). The first end of the lead wire (3111) extends out of the wire slot (3121) and extends to the outside of the winding frame (312).

6. The brushless power tool according to claim 5, characterized in that, The lead wire (3111) extends in a straight line between the wire groove (3121) and the through hole (51).

7. The brushless power tool according to claim 1, characterized in that, The brushless motor (3), the conductive connecting element (5), and the control board (4) are arranged sequentially from top to bottom, with the first end of the lead wire (3111) located behind the control board (4); The conductive connecting element (5) has a first connecting segment (52) and a second connecting segment (53) formed at both ends. The through hole (51) is provided on the first connecting segment (52). The first connecting segment (52) extends backward and upward at an angle to be electrically connected to the lead wire (3111). The second connecting segment (53) extends downward to be electrically connected to the control board (4).

8. The brushless power tool according to claim 7, characterized in that, The conductive connecting element (5) further includes a connecting segment (54), the two ends of which are respectively connected to the first connecting segment (52) and the second connecting segment (53); The axis of the brushless motor (3) extends horizontally, the control board (4) is horizontally positioned, and the connecting section (54) extends horizontally at least partially.

9. The brushless power tool according to any one of claims 1-8, characterized in that, The conductive connecting element (5) is an elastic metal sheet.

10. The brushless power tool according to any one of claims 1-8, characterized in that, The first end of the lead wire (3111) is electrically connected to the conductive connecting element (5) by welding; And / or, the conductive connection element (5) is electrically connected to the control board (4) by welding; And / or, the through hole (51) includes a through hole or a blind hole.

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