Electric tool

Abstract

The utility model discloses an electric tool which comprises a main body part, a motor, a holding assembly, a main control assembly, an electric control switch and a state display lamp, the motor is arranged in the main body part, the holding assembly comprises a base part, a first handheld part, a second handheld part and a stand column, and the base part is arranged at the end, away from power output of the motor, of the main body part; the base part, the first handheld part, the second handheld part, the stand column and the base part are sequentially connected to form a holding space; the main control assembly is at least partially arranged in the base part and connected with the motor through a first wire. The electric control switch is arranged at the joint of the first handheld part and the second handheld part and connected with the main control assembly through a second wire. The state display lamp is arranged on the stand column and connected with the main control assembly through a third wire. The motor, the electric control switch and the state display lamp are located on the three different sides of the main control assembly respectively, wiring paths of the first wire, the second wire and the second wire are mutually independent and do not interfere with one another, and wire arrangement is more convenient and smoother.

Description

Technical Field

[0001] The utility model belongs to the technical field of power tools, and particularly relates to a power tool with an improved wiring structure. Background Art

[0002] Power tools such as slotting machines and angle grinders control the motor through an electric control switch and are provided with a status display lamp for indicating the tool status, so as to timely warn the user in case of a failure and reduce the possibility of tool damage or safety accidents. The electric control switch, the status display lamp, the motor, etc. all need to be conductively connected to the main control component, and the layout of these functional components in the whole machine affects the wire arrangement and the shape of the whole machine.

[0003] In the existing power tools, the electric control switch for controlling the motor is usually arranged at the front end of the handle, and the status display lamp is arranged on the main body for easy observation. However, these designs do not comprehensively consider the arrangement and overall relationship of relevant functional components. Therefore, the overall structure arrangement of the electrician tool is unreasonable, resulting in chaotic wiring.

[0004] Therefore, it is necessary to improve the existing technology to overcome the defects in the existing technology. Content of the Utility Model

[0005] Therefore, the technical problem to be solved by the utility model is the unreasonable structure arrangement and chaotic wiring of power tools in the existing technology.

[0006] To solve the above technical problem, the utility model provides a power tool, including:

[0007] A main body part, which is cylindrical;

[0008] A motor, which is arranged inside the main body part;

[0009] A holding assembly, including a base part, a first hand-held part, a second hand-held part and a column. The base part is arranged at one end of the main body part far from the motor power output. The base part, the first hand-held part, the second hand-held part, the column and the base part are sequentially connected to form a holding space;

[0010] A main control assembly, including a main control board and components arranged on the main control board. At least part of the main control assembly is arranged inside the base part and is connected to the motor through a first wire;

[0011] An electric control switch, which is arranged at the connection of the first hand-held part and the second hand-held part and is connected to the main control assembly through a second wire;

[0012] A status display lamp, which is arranged on the column and is connected to the main control assembly through a third wire;

[0013] The motor is located on the first side of the main control assembly, the electric control switch is located on the second side of the main control assembly, the status indicator light is located on the third side of the main control assembly, and the wiring paths of the first wire, the second wire, and the third wire are independent of each other.

[0014] In one embodiment, the first board surface of the main control board faces the column, and at least part of the components are arranged on the first board surface.

[0015] In one embodiment, the main control board is perpendicular to the column, and the projection of the column on the main control board is within the range of the main control board.

[0016] In one embodiment, the main control assembly further includes an installation box for accommodating the main control board. The open end of the installation box faces the column, and the main control board is arranged in the installation box.

[0017] In one embodiment, part of the main control assembly is arranged on the base part and part is arranged on the main body part. The main control assembly includes an installation box for accommodating the main control board. Guide ribs and / or guide grooves for cooperating with the main body part and / or the base part are arranged on the outer side surface of the installation box, and the installation box is slidably inserted into the main body part and / or the base part through the guide ribs and / or guide grooves.

[0018] In one embodiment, the components include capacitors arranged on the main control board, and the capacitors are thin-film capacitors.

[0019] In one embodiment, the outer diameter of the circumcircle of the first hand-held part is smaller than the outer diameter of the circumcircle of the base part. The power tool further includes an electromagnetic shielding assembly arranged in the first hand-held part. The electromagnetic shielding assembly includes an electromagnetic shielding circuit board. The second wire connects the main control assembly and the electromagnetic shielding circuit board, and the electromagnetic shielding circuit board and the electric control switch.

[0020] In one embodiment, the electromagnetic shielding assembly further includes a box body for accommodating the electromagnetic shielding circuit board. A limiting groove is arranged in the first hand-held part, and the box body is arranged in the limiting groove;

[0021] The electromagnetic shielding circuit board includes a substrate arranged in the box body and electromagnetic shielding elements arranged on the substrate. The electromagnetic shielding elements are arranged on the board surface of the substrate facing the open end of the box body.

[0022] In one embodiment, a wire passing groove is arranged in the first hand-held part. Along the length direction of the first hand-held part, the wire passing groove is arranged at both ends of the electromagnetic shielding assembly, and the second wire is clamped into the wire passing groove.

[0023] In one embodiment, the motor and the electric control switch are respectively located on opposite sides of the main control component in the axial direction of the motor.

[0024] The technical solution provided by the present utility model has the following advantages:

[0025] For the electric tool provided by the present utility model, the motor is arranged in the main body part, the holding component includes a base part, a first hand-held part, a second hand-held part and a column. The base part is arranged at one end of the main body part far from the power output of the motor. The base part, the first hand-held part, the second hand-held part, the column and the base part are sequentially connected to form a holding space. At least part of the main control component is arranged in the base part. The electric control switch is arranged at the connection part of the first hand-held part and the second hand-held part. The status display lamp is arranged on the column. The motor, the electric control switch and the status display lamp are respectively located on three different sides of the main control component, so that the wiring paths of the connecting wires of the motor, the electric control switch and the status display lamp with the main control component are independent of each other and do not interfere with each other, and the wire laying is more convenient and smooth. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a three-dimensional structural schematic diagram of the electric tool provided by the embodiment of the present utility model;

[0028] Figure 2 For Figure 1 It is a three-dimensional structural schematic diagram of the electric tool shown in hiding half of the main body part and the holding component;

[0029] Figure 3 It is a three-dimensional structural schematic diagram of the main control component provided by an embodiment of the present utility model;

[0030] Figure 4 For Figure 3 It is a three-dimensional structural schematic diagram of the main control component shown from another perspective;

[0031] Figure 5 It is a three-dimensional structural schematic diagram of the main body part provided by the embodiment of the present utility model;

[0032] Figure 6 It is a three-dimensional structural schematic diagram of the electromagnetic shielding component provided by an embodiment of the present utility model;

[0033] Figure 7 It is a partial structural schematic diagram of half of the shell of the holding component provided by an embodiment of the present utility model. Detailed implementation manners

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. The present utility model will be described in detail below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0035] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence.

[0036] In the present utility model, unless otherwise stated, the orientation terms such as "upper", "lower", "top", "bottom" are usually in the direction shown in the drawings, or in the vertical, perpendicular or gravitational direction of the component itself; similarly, for the convenience of understanding and description, "inner" and "outer" refer to the inside and outside relative to the contour of each component itself, but the above orientation terms do not limit the present utility model.

[0037] This embodiment provides an electric tool. Figure 1 It is a three-dimensional structural schematic diagram of the electric tool provided by the embodiment of the present utility model. Figure 2 is Figure 1 A three-dimensional structural schematic diagram of the hidden main body part and half of the housing of the holding assembly of the electric tool shown. Figure 1 and Figure 2 The electric tool 100 shown is specifically a grooving machine. This embodiment is described by taking the grooving machine as an example, but it should not be construed as a limitation to the present utility model.

[0038] The electric tool of the present utility model can also be a hand-held electric tool such as a angle grinder.

[0039] Please refer to Figure 1 and Figure 2 , the electric tool 100 includes a main body part 10, a motor 20 arranged in the main body part 10, a holding assembly 30 connected to the main body part 10, a main control assembly 40, an electric control switch 50 and a status display lamp 60.

[0040] The main body part 10 is used to house the motor 20. The main body part 10 is in a cylindrical shape and includes a circumferential side wall arranged around the center line of the main body part 10 and a receiving cavity formed by enclosing the circumferential side wall. The motor 20 is arranged in the receiving cavity of the main body part 10, and the axis of the motor 20 is substantially parallel to the center line of the main body part 10. Preferably, the axis of the motor 20 is substantially collinear with the center line of the main body part 10, and the structure of the main body part 10 is compact.

[0041] For the purpose of convenience of description, the end of the main body 10 close to the power output end of the motor 20 is defined as the distal end of the main body 10, and the end relatively far from the power output end of the motor 20 is defined as the proximal end of the main body 10. The power tool 100 further includes a working shaft 80 disposed at the distal end of the main body 10. The working shaft 80 is in transmission connection with the output shaft of the motor 20 and is driven by the motor 20 to rotate, and is used to drive a working head (not shown) mounted on the working shaft 80 to perform a working task.

[0042] The holding assembly 30 is connected to the proximal end of the main body 10 and is used for an operator to hold to control the power tool 100. Specifically, the holding assembly 30 includes a base 31, a first hand-held portion 33, a second hand-held portion 35 and a column 37. The base 31 is disposed at the end of the main body 10 away from the power output of the motor 20, that is, the base 31 is disposed at the proximal end of the main body 10. The base 31, the first hand-held portion 33, the second hand-held portion 35, the column 37, and the base 31 are sequentially connected to form a closed ring, and the surrounding space of the ring forms a holding space. The hand of the operator can reach into the holding space to grasp the first hand-held portion 33 and / or the second hand-held portion 35, so as to manipulate the power tool 100.

[0043] More specifically, the first hand-held portion 33, the base 31 and the main body 10 are sequentially disposed along the axial direction of the motor 20. One end of the second hand-held portion 35 is connected to the end of the first hand-held portion 33 away from the base 31. The starting portion of the second hand-held portion 35 extends along a direction inclined to the first hand-held portion 33. The other end of the second hand-held portion 35 is connected to the column 37, and the end of the column 37 away from the second hand-held portion 35 is connected to the side wall of the base 31. In this way, the base 31, the first hand-held portion 33, the second hand-held portion 35, the column 37, and the base 31 are connected end to end in sequence to form the above-mentioned holding space.

[0044] The first hand-held portion 33 has a first holding center line, and the base 31 has a base center line. Both the first holding center line and the base center line are arranged parallel to the axis of the motor 20. Among them, the base center line is substantially collinear with the axis of the motor 20, the first holding center line is offset from the base center line, and the first hand-held portion 33 and the base 31 are substantially flush on the side away from the second hand-held portion 35, so that the holding space is larger. The second hand-held portion 35 has a second holding center line, and the starting section of the second holding center line forms an acute angle with the first holding center line. That is, the starting end of the second hand-held portion 35 is arranged at an acute angle with the first hand-held portion 33, and the structure of the holding assembly 30 is more compact.

[0045] The holding assembly 30 further includes an auxiliary handle 38. The auxiliary handle 38 is disposed on one side of the main body 10 and is used for auxiliary holding. Specifically, the extending direction of the auxiliary handle 38 is substantially perpendicular to the center line of the main body 10, and the auxiliary handle 38 is close to the working shaft 80, so as to facilitate the control of the working head mounted on the working shaft 80.

[0046] The main control component 40 is used to control the motor 20, and is at least partially disposed within the base 31 and is connected to the motor 20 via a first wire (not shown). Please also refer to Figure 3 , the main control component 40 includes a main control board 41 and components 42 disposed on the main control board 41. The plane of the main control board 41 is parallel to the axis of the motor 20. The main control board 41 includes a first plane and a second plane facing away from each other. The components 42 can be dispersedly disposed on the first plane and the second plane of the main control board 41, or can be centrally disposed on the first plane or the second plane of the main control board 41, and there is no limitation here.

[0047] The electric control switch 50 is used for an operator to trigger to control the start and stop of the motor 20. The electric control component 50 is disposed at the connection of the first hand-held part 33 and the second hand-held part 35 and is connected to the main control component 40 via a second wire (not shown).

[0048] The status display lamp 60 is used to display the working status of the power tool 100. Among them, the working status includes a fault status. The status display lamp 60 can indicate the fault status of the power tool 100, so as to timely remind the operator to stop the machine in time. Specifically, the status display lamp 60 is disposed on the column 37 and is connected to the main control component 40 via a third wire (not shown).

[0049] Through the above settings, the motor 20 is located on the first side of the main control component 40, the electric control switch 50 is located on the second side of the main control component 40, and the status display lamp 60 is located on the third side of the main control component 40. The first wire, the second wire, and the third wire are respectively connected to the main control component 40 from 3 different sides, so that the wiring paths of the first wire, the second wire, and the third wire are independent of each other and do not interfere with each other. It should be noted that the number of the first wire, the second wire, and the third wire is set according to needs, and there is no limitation here.

[0050] In the power tool provided in this embodiment, the motor is disposed within the main body part. The holding assembly includes a base, a first hand-held part, a second hand-held part, and a column. The base is disposed at one end of the main body part away from the motor power output. The base, the first hand-held part, the second hand-held part, the column, and the base are sequentially connected to form a holding space. The main control component is at least partially disposed within the base. The electric control switch is disposed at the connection of the first hand-held part and the second hand-held part. The status display lamp is disposed on the column. The motor, the electric control switch, and the status display lamp are respectively located on 3 different sides of the main control component, so that the wiring paths of the connecting wires between the motor, the electric control switch, and the status display lamp and the main control component are independent of each other and do not interfere with each other, and the wire laying is more convenient and smooth.

[0051] In order to reduce the wiring difficulty and suppress the overall volume, in one embodiment, please refer to Figure 2As shown, the motor 20 and the electric control switch 50 are respectively located on opposite sides of the main control component 40 in the axial direction of the motor 20. That is to say, in the axial direction of the motor 20, the electric control switch 50, the main control component 40, and the motor 20 are arranged in sequence along the axial direction of the motor 20, and the wire connection routes between the electric control switch 50 and the main control component 40 and between the main control component 40 and the motor 20 are substantially parallel to each other. Such a setting makes the space between the wiring paths of the first wire, the second wire, and the third wire large enough, and at the same time does not significantly increase the overall size of the tool.

[0052] In order to shorten the overall wire routing length, in one embodiment, please refer to Figure 2 and Figure 3 , the first board surface of the main control board 41 of the main control component 40 is arranged facing the column 37, and at least part of the components 42 are arranged on the first board surface. The first board surface of the main control board 41 is arranged facing the column 37, and the connection status indicator light 60 and the third wire of the main control component 40 are basically connected along a straight path, which can avoid the wiring trouble caused by the bending of the third wire and can also shorten the wire routing length.

[0053] In a specific embodiment, the main control board 41 is perpendicularly arranged to the column 37, and the projection of the column 37 on the main control board 41 is within the range of the main control board 41. More preferably, with the first board surface of the main control board 41 as a reference, the column 37 is directly above the main control board 41, and the distances between the column 37 and the edges of the main control board 41 are basically the same. The wire outlet position of the third wire arranged along the column 37 basically does not affect the length of the wire routing path, and it can be connected to the main control board 41 with a shorter path.

[0054] In a specific implementation scenario, a grooving machine is often used for grooving in working conditions such as walls and roads, and has a relatively high power. The grooving machine usually also needs to operate with water, that is, a water pipe is connected to a shield (not shown) to cool the working head when the working head is working. Therefore, the grooving machine has relatively high performance requirements for the main control component and also has relatively high waterproof requirements.

[0055] In order to facilitate the waterproofing and installation of the main control component, in a specific embodiment, part of the main control component 40 is arranged in the base 31 and part is arranged in the main body 10. Since the first handle part 33 is adjacent to the base 31, a part of the main control component 40 extends into the base 31 and is relatively close to the electric control switch and the status indicator light, which is convenient for shortening the wire lengths for electrically connecting the electric control switch and the status indicator light respectively and reducing the wiring and installation difficulty. Please refer to Figure 3As shown, the main control assembly 40 also includes a mounting box 43 for accommodating the main control board 41. The mounting box 43 has an open side, and the open side faces the column 37. The main control board 41 is fixedly arranged in the mounting box 43. The main control board 41 is fixed in the housing of the power tool 100 by the mounting box 43, so that the fixing of the main control board 41 is more convenient. Moreover, the mounting box 43 has side walls on the bottom side and the circumferential direction, which can form an isolation barrier on multiple sides of the main control board 41, thereby reducing the risk of the main control board 41 and the components 42 being exposed to water.

[0056] Preferably, a gap is provided between the main control board 41 and the bottom wall of the installation box 43. The gap between the main control board 41 and the bottom wall of the installation box 43 allows for the installation of some small-sized components, thereby reducing the size of the main control board 41, and the gap also facilitates the heat dissipation of the components of the main control board. In a specific embodiment, a thermal conductive adhesive may be filled in the gap to improve the thermal conductivity and ensure the heat dissipation effect.

[0057] To facilitate assembly of the main control assembly, in some embodiments, see Figure 4 and Figure 5 , a guide rib 431 is provided on the outer side of the installation box 43, and a guide groove 432 is provided on the bottom surface of the installation box 43. The guide ribs 431 are respectively provided on the outer surfaces of the two opposite side walls of the installation box 43. Preferably, a guide rib 431 is provided on each of the outer surfaces of the two side walls, and the two guide ribs 431 are parallel to each other. Specifically, two convex ribs 433 are provided on the outer surface of the bottom wall of the installation box 43, and the two convex ribs 433 are parallel to each other and spaced apart, and the above-mentioned guide groove 432 is formed between them.

[0058] Correspondingly, grooves that slide with the guide ribs 431 are provided at corresponding positions of the main body 10. Specifically, the main body 11 includes two ribs 11 protruding from the inner wall of the main body 11. The two ribs 11 are parallel to each other and spaced apart, and the grooves that slide with the guide ribs 431 are formed therebetween. The main body 11 also includes a guide rail 12, which is suitable for being inserted into the guide groove 432 and slidingly matching with the guide groove 432.

[0059] When the main control component 40 needs to be installed, align the guide rib 431 of the installation box 43 with the groove between the two ribs 11, align the guide groove 432 with the guide rail 12, and apply force along the axial direction to push the main control component 40 into the main body 10 until the main control component 40 and the main body 10 are plugged into place, and then fix the installation box 43 and the main body 10 with fasteners.

[0060] For details, see Figure 5 The guide rail 12 is provided with a fixing hole 120 on one side facing the main control assembly 40, and a clearance notch is provided on the side wall of the guide groove 432 opposite to the fixing hole 120. 435When the installation box 43 and the main body 10 are plugged into place, the clearance gap 435 is adjacent to and aligned with the fixing hole 120, and a screw is passed through the clearance gap 435 from one side to fix it with the fixing hole 120, so that the side wall of the guide groove 432 forming the clearance gap 435 is pressed and fixed to the guide rail 12, thereby realizing the fixation of the main control component 40 and the main body 10.

[0061] In other embodiments, the outer side of the installation box may be provided with only guide ribs, and the corresponding grooves cooperating with the guide ribs may be provided in the main body. Alternatively, the outer side of the installation box may be provided with only guide grooves, and the corresponding guide rails cooperating with the guide grooves may be provided in the main body. In other words, the installation box may be plugged into the main body using the structure of guide ribs and / or guide grooves.

[0062] In other embodiments, the main control assembly may also be slidably plugged with the base. Specifically, a guide rib and / or a guide groove may be provided at one end of the installation box facing the base, and a groove or a guide rail etc. that cooperates with the guide rib and / or the guide groove may be provided at a corresponding position of the base. The specific matching structure (guide groove, guide rib, groove and guide rail) of the slidable plugging of the installation box and the base may refer to the plug-in matching structure of the installation box and the main body described in the above embodiment, and will not be described in detail here.

[0063] It should be noted that the two ends of the installation box 43 can be respectively provided with a matching structure for sliding insertion with the base 31 and the main body 10, or only one end of the installation box 43 can be provided with a matching structure for sliding insertion with the base 31 or the main body 10, as long as the sliding installation of the installation box and the power tool housing can be achieved.

[0064] In order to locate the insertion depth of the main control assembly into the main body, in a specific embodiment, a positioning structure is provided between the installation box and the main body and / or the base. Figure 4 As shown, the positioning structure includes a positioning rib 44 disposed on the side wall of the installation box 43 facing the main body 10. The positioning rib 44 protrudes from the side wall of the installation box 43 and is used to abut against the internal structure of the main body 10 to limit the insertion stroke of the installation box 43. Specifically, there are two positioning ribs 44, which are spaced apart and disposed on the side wall of the installation box 43 facing the main body 10. After the positioning rib 44 abuts against the main body 10, a gap is formed between the installation box 43 and the abutting structure of the main body 10, so that airflow can flow around the installation box 43 and ensure the heat dissipation of the main control component.

[0065] In other embodiments, the function of the positioning structure can be achieved by using guide ribs 431 and / or convex ribs 433 protruding from the side wall surface of the installation box 43. The guide ribs 431 and / or convex ribs 433 protrude from the side wall of the installation box 43 opposite to the main body, and can be abutted against the internal structure of the main body 10, thereby limiting the insertion depth of the main control component.

[0066] In some alternative embodiments, the side wall of the mounting box 43 facing the main body 10 may also be directly in contact with the main body 10, and the main body 10 is provided with a rib structure at the corresponding contact position for contacting the side wall of the mounting box 43.

[0067] Similarly, the positioning structure may be provided between the mounting box and the base. The positioning structure between the mounting box and the base may refer to the positioning structure between the mounting box and the main body, which will not be elaborated here.

[0068] Since the power and load of the grooving machine are relatively large, high performance requirements are imposed on the components. Taking capacitors as an example, the component 42 includes a capacitor 420 disposed on the main control board 41. If a small capacitor is selected, when the working current is too large, the voltage cannot be stabilized, resulting in capacitor explosion, thus causing the machine to fail and posing risks. Therefore, manufacturers generally choose super-large capacitors, or even multiple capacitors. However, as a handheld tool, the grooving machine is used in the scenario of cutting wall grooves. The larger the capacitor used, the more the weight of the product itself will increase, and the greater the requirement for the internal space of the machine, which will increase the volume of the whole machine and is not conducive to the user's long-term holding and working.

[0069] Traditional electrolytic capacitors have positive and negative poles. When in use, the positive and negative poles must be strictly distinguished. If the polarity is incorrect, it will explode after being powered on. Therefore, welding and installation during product manufacturing are particularly important. However, the existing capacitor welding is all manually operated, which has certain potential safety hazards. Moreover, electrolytic capacitors are sensitive to temperature and have poor overvoltage tolerance. Whether the ambient temperature is too high or too low, it will cause a decrease in capacitance or even damage. Electrolytic capacitors can only withstand about 20% overvoltage. When the overvoltage is higher, the electrolytic capacitor will be damaged, and its withstand voltage margin is relatively small. However, for a grooving machine, it is inevitable to encounter momentary stall under large load, and the instantaneous voltage will also increase, exceeding the predetermined voltage value of the electrolytic capacitor and damaging the electrolytic capacitor.

[0070] To solve the above problems, the capacitor 420 in this embodiment is a thin-film capacitor. The capacitor 420 of the main control assembly 40 being a thin-film capacitor has the following advantages: 1. For the same withstand voltage value, the volume of the thin-film capacitor is very small and can be directly fabricated on the main control board without the need for separate lead wires; 2. The thin-film capacitor is non-polar, and there is no need to distinguish between the positive and negative poles during installation, eliminating the worry of capacitor explosion caused by reverse connection of the positive and negative poles. The production line installation is very convenient, effectively saving working hours and ensuring that the product is error-free; 3. The working temperature range of the thin-film capacitor is relatively wide, generally from -40 °C to +105 / 110 °C, with good temperature characteristics. It can be used normally whether in very cold places or in hot summer. Even when the machine is under high load and high temperature rise, it can still be used normally, greatly improving the service life and use efficiency of the machine; 4. The withstand voltage of the thin-film capacitor has a margin. Generally, it can withstand overvoltage higher than 1.5 times the rated voltage for a short time, with strong overvoltage tolerance and reduced risk of machine burnout.

[0071] Due to the relatively high power, in order to ensure the normal operation of the components of the power tool and reduce the electromagnetic interference to the environment, in one embodiment, please refer to Figure 2 , the power tool 100 further includes an electromagnetic shielding assembly 70. In this embodiment, the outer diameter of the circumcircle of the first hand-held part 33 is smaller than the outer diameter of the circumcircle of the base part 31. The first hand-held part 33 is set thinner for easy grasping by the operator, and the base part 31 is set thicker to increase the accommodation space and facilitate the accommodation of the main control assembly 40. The electromagnetic shielding assembly 70 is arranged in the first hand-held part 33. Utilizing the existing internal space of the first hand-held part 33, the arrangement of the electromagnetic shielding assembly 70 will not increase the overall volume of the power tool.

[0072] Specifically, please refer to Figure 6 together. The electromagnetic shielding assembly 70 includes an electromagnetic shielding circuit board 71. The second wire includes two segments. One segment is electrically connected to the main control assembly 40 and the electromagnetic shielding circuit board 71, and the other segment is electrically connected to the electromagnetic shielding circuit board 71 and the electric control switch 50. The arrangement of the electromagnetic shielding assembly can reduce the interference of the external electromagnetic field on the normal operation of the power tool, and can also shield the electromagnetic field of the power tool itself from affecting the external environment, reducing the electromagnetic pollution to the environment.

[0073] More specifically, please refer to Figure 6 and Figure 7 . The electromagnetic shielding assembly 70 further includes a box body 73 for accommodating the electromagnetic shielding circuit board 71. One side of the box body 73 is open. A limiting groove 330 is arranged in the first hand-held part 33. A limiting structure is arranged on the circumferential side of the limiting groove 330 for limiting cooperation with the side wall of the box body 73 to snap the box body 73 into the limiting groove 330.

[0074] In this embodiment, the bottom wall of the box body 73 faces the bottom side of the limiting groove 330. The side wall of the box body 73 is in interference contact with the limiting structure of the limiting groove 330. The box body 73 is embedded into the limiting groove 330 and is fixed relative to the first hand-held part 33. The electromagnetic shielding circuit board 71 includes a substrate 710 arranged in the box body 73 and an electromagnetic shielding element 712 arranged on the substrate 710. The electromagnetic shielding element 712 is arranged on the plate surface of the substrate 710 facing the open side of the box body 73. By arranging the electromagnetic shielding circuit board in the first hand-held part through the box body, it is convenient to fix the electromagnetic shielding circuit board and can also improve the waterproof effect of the electromagnetic shielding circuit board.

[0075] The limiting structure arranged on the circumferential side of the limiting groove 330 includes limiting ribs 335. The limiting ribs 335 are dispersedly arranged at the circumferential side position of the limiting groove 330 for abutting and cooperating with the outer side wall of the box body 73.

[0076] In order to facilitate the regular routing of wires, in a specific embodiment, please refer to Figure 7As shown, a wire groove 331 is also provided in the first hand-held portion 33. The wire groove 331 is arranged at both ends of the electromagnetic shielding assembly 70 along the length direction of the first hand-held portion 33, and the two sections of the second wire are respectively inserted into the corresponding wire groove 331. Specifically, the wire groove 331 is provided on the limiting rib 335. In the length direction of the first hand-held portion 33, the limiting rib 335 includes two rib plates arranged opposite to each other, and the two rib plates are respectively located at both ends of the electromagnetic shielding assembly 70. The two rib plates form two opposite side walls of the limiting groove 330, and each rib plate is provided with a wire groove 331. The wire groove 331 is constructed as a notch groove of the limiting rib 335. The wire groove 331 extends from the end edge of the limiting rib 335 to the bottom of the limiting groove 330, and the depth direction of the wire groove 331 is the same as the depth direction of the limiting groove 330. The second wire can be inserted into the wire groove from the opening of the wire groove, and pressed in the depth direction of the limiting groove so that the second wire is completely inserted into the wire groove. In this way, the clamping and pressing operation direction of the second wire is the same as the embedding direction of the electromagnetic shielding component. The embedding operation of the electromagnetic shielding component can drive the second wire to be embedded in the wire groove, which is convenient to operate and has high wiring efficiency.

[0077] Furthermore, the limiting groove 330 further includes a supporting rib 334 disposed on the bottom wall of the limiting groove 330, and the supporting rib 334 is used to abut against the outer surface of the bottom wall of the box body 73, and is used to support and limit the bottom wall of the box body 73. The arrangement of the limiting rib and the supporting rib makes the support and limitation of the box body more stable and reliable.

[0078] As described in the above embodiment, the first hand-held portion 33 has a first gripping centerline, and the second hand-held portion 35 has a second gripping centerline. Further, the substrate 710 is arranged parallel to the gripping centerlines of the first hand-held portion 33 and the second hand-held portion 35. In other words, the substrate 710 is parallel to the first gripping centerline and the second gripping centerline, so that the board surface of the substrate 710 where the components are arranged faces the open side of the gripping assembly.

[0079] Obviously, the above described embodiments are only a part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the utility model.

Claims

1. An electric tool, characterized in that, Comprising: A main body part, which is cylindrical; A motor, which is arranged inside the main body part; A holding assembly, which includes a base part, a first hand-held part, a second hand-held part and a column. The base part is arranged at one end of the main body part far away from the power output of the motor. The base part, the first hand-held part, the second hand-held part, the column and the base part are sequentially connected to form a holding space; A main control assembly, which includes a main control board and components arranged on the main control board. At least part of the main control assembly is arranged inside the base part and is connected to the motor through a first wire; An electric control switch, which is arranged at the connection of the first hand-held part and the second hand-held part and is connected to the main control assembly through a second wire; A status display lamp, which is arranged on the column and is connected to the main control assembly through a third wire; The motor is located on the first side of the main control assembly, the electric control switch is located on the second side of the main control assembly, the status display lamp is located on the third side of the main control assembly, and the wiring paths of the first wire, the second wire and the third wire are independent of each other.

2. The power tool according to claim 1, characterized in that The first board surface of the main control board faces the column, and at least part of the components are arranged on the first board surface.

3. The electric tool according to claim 2, wherein The main control board is perpendicular to the column, and the projection of the column on the main control board is within the range of the main control board.

4. The power tool according to claim 1, characterized in that, The main control assembly further includes an installation box for receiving the main control board. The open end of the installation box faces the column, and the main control board is arranged in the installation box.

5. The power tool according to claim 1, characterized in that, Part of the main control assembly is arranged in the base part and part is arranged in the main body part. The main control assembly includes an installation box for receiving the main control board. The outer side surface of the installation box is provided with guiding ribs and / or guiding grooves for cooperating with the main body part and / or the base part. The installation box is slidably inserted into the main body part and / or the base part through the guiding ribs and / or guiding grooves.

6. The power tool according to claim 1, characterized in that, The components include a capacitor arranged on the main control board, and the capacitor is a thin film capacitor.

7. The power tool according to claim 1, characterized in that, The outer diameter of the circumcircle of the first hand-held part is smaller than the outer diameter of the circumcircle of the base part. The power tool further includes an electromagnetic shielding assembly arranged inside the first hand-held part. The electromagnetic shielding assembly includes an electromagnetic shielding circuit board. The second wire connects the main control assembly and the electromagnetic shielding circuit board, and the electromagnetic shielding circuit board and the electric control switch.

8. The power tool according to claim 7, wherein The electromagnetic shielding assembly further includes a box body for receiving the electromagnetic shielding circuit board. A limiting groove is arranged inside the first hand-held part, and the box body is arranged in the limiting groove; The electromagnetic shielding circuit board includes a substrate arranged in the box body and electromagnetic shielding elements arranged on the substrate. The electromagnetic shielding elements are arranged on the board surface of the substrate facing the open end of the box body.

9. The power tool according to claim 7, characterized in that, A wire passing groove is arranged inside the first hand-held part. Along the length direction of the first hand-held part, the wire passing groove is arranged at both ends of the electromagnetic shielding assembly, and the second wire is clamped into the wire passing groove.

10. The power tool according to claim 1, characterized in that, The motor and the electric control switch are respectively located on opposite sides of the main control assembly in the axial direction of the motor axis.

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