Electric tool

Abstract

The invention provides an electric tool, and relates to the technical field of electric tools. The electric tool comprises a shell, the shell is provided with a battery pack cavity, and the battery pack cavity is configured to be provided with a battery pack; the control panel is arranged in the shell; the working part is arranged on the shell; the motor is arranged in the shell, and the motor drives the working part to work; the air duct is arranged in the shell and is used for dissipating heat of the electric tool; the fan is fixed with an output shaft of the motor so as to drive air to flow along the air duct during rotation; wherein the shell is provided with at least two air inlets and at least one first air outlet, and the air duct is arranged between the air inlets and the first air outlet. The air channel is smooth, air flow rapidly enters the shell through the air inlet and then is exhausted through the air outlet, the heat dissipation capacity of the electric tool is guaranteed, and the problem of over-temperature protection caused by the fact that the temperature of the electric tool is too high is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric tools, and in particular to an electric tool. Background Art

[0002] Power tools generally refer to electric drills, electric wrenches, electric screwdrivers, electric scissors, electric hammers, electric planers, electric grinders, electric saws and other tools that use electricity as a power source. In gardening, power tools usually refer to electric scissors, chainsaws, hedge trimmers and other electronically controlled tools used in gardening.

[0003] Electric tools have advantages such as low vibration, low noise and low pollution, but they need good heat dissipation. Existing electric tools have poor heat dissipation. When working in high outdoor temperatures, the machine is prone to high temperature protection, affecting the user's work. In particular, the existing electric tools have a single air inlet. Once the air inlet is blocked by debris, sundries, etc., it will quickly cause the temperature of the electric tool to rise, triggering high temperature protection and affecting the user's work. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the present invention provides an electric tool to improve the technical problems of the prior art electric tools such as poor heat dissipation effect and easy triggering of high temperature protection.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides an electric tool. The electric tool comprises a housing, the housing is provided with a battery pack cavity, the battery pack cavity is configured to install a battery pack; a control panel is provided in the housing; a working part is provided in the housing; a motor is provided in the housing, the motor drives the working part to work; an air duct is provided in the housing to dissipate heat for the electric tool; a fan is fixed to the output shaft of the motor to drive air to flow along the air duct when rotating; wherein, at least two air inlets and at least one first air outlet are provided on the housing, and the air duct is provided between the air inlet and the first air outlet.

[0006] In an exemplary embodiment of the present application, a confluence port is provided in the air duct, and airflows in at least two air inlets converge into the confluence port.

[0007] In an exemplary embodiment of the present application, the confluence port is disposed between the battery pack cavity and the control board.

[0008] In an exemplary embodiment of the present application, a heat dissipation column is arranged on the back side of the control panel, a first air guide plate is arranged below the confluence, a second air guide plate is arranged on the side of the control panel close to the confluence, the second air guide plate extends away from the heat dissipation column, and the first air guide plate cooperates with the second air guide plate to make the air flow flow toward the heat dissipation column.

[0009] In an exemplary embodiment of the present application, a filtering device is provided at the air inlet.

[0010] In an exemplary embodiment of the present application, an air guide portion is disposed in the housing and covers the outside of the motor. The air guide portion is disposed between the confluence port of the air duct and the first air outlet.

[0011] In an exemplary embodiment of the present application, an air guide inlet is disposed on the air guide portion, and the air guide inlet and the confluence port are disposed on two sides of the control panel.

[0012] In an exemplary embodiment of the present application, the shell includes a first shell, a second shell and an upper shell, the upper shell is arranged above the battery pack cavity, and the air inlet includes a first air inlet arranged on the side wall of the shell, a second air inlet arranged on the bottom of the battery pack cavity, a third air inlet arranged at the connection between the first shell and the upper shell, a fourth air inlet arranged at the connection between the second shell and the upper shell, and one or more of a fifth air inlet arranged on the top of the side wall of the battery pack cavity.

[0013] In an exemplary embodiment of the present application, a groove recessed into the shell is provided at a connection between the first shell and the upper shell, and the third air inlet is provided at an inner top of the groove.

[0014] In an exemplary embodiment of the present application, the shell includes a first shell and a second shell, and a plurality of wire connection parts for connecting a wiring harness are arranged in the power tool, and the wire connection parts are all arranged on a visible surface of the power tool after the first shell is removed.

[0015] In an exemplary embodiment of the present application, the battery pack cavity is fixed on the shell, and the wire connecting portion is disposed on a side wall of the battery pack cavity close to the second shell.

[0016] In an exemplary embodiment of the present application, the motor includes a housing, the fan includes a fan blade, and the outer diameter of the fan blade is greater than the outer diameter of the housing.

[0017] In an exemplary embodiment of the present application, the electric tool also includes a volute, which is mounted outside the fan, and the volute is provided with a vortex, which gradually widens along the rotation direction of the fan, and a second air outlet is provided on the volute, and the second air outlet is arranged at the first air outlet.

[0018] In an exemplary embodiment of the present application, an air blocking plate is provided at the second air outlet, and the air blocking plate extends along the second air outlet of the volute in the opposite direction of the rotation direction of the fan.

[0019] In an exemplary embodiment of the present application, a perpendicular line of the air blocking plate passing through the end surface of the air blocking plate passes through the center of the fan.

[0020] In an exemplary embodiment of the present application, the working part includes a cutting assembly; the electric tool also includes: a lubrication device, which is arranged in the housing, the lubrication device includes an oil pump and an oil pot, one end of the oil pump is connected to the oil pot, and the other end is connected to the cutting assembly; wherein, the oil pump includes a pump body, a first positioning member and a second positioning member are provided on the pump body, and a center line of the first positioning member and the second positioning member is offset from a center line of the pump body; and at least one mounting hole is also provided on the pump body.

[0021] In an exemplary embodiment of the present application, the first positioning member and the second positioning member are positioning pins protruding from the surface of the pump body, and positioning holes cooperating with the positioning pins are correspondingly provided on the housing.

[0022] In an exemplary embodiment of the present application, the oil pump also includes a transmission plate and a worm gear, wherein the transmission plate is coaxially fixed with the output shaft of the motor, the worm gear is coaxially arranged with the transmission plate and meshingly connected with the driving turbine in the pump body, and a transmission device for driving the worm gear to rotate is provided between the worm gear and the transmission plate.

[0023] In an exemplary embodiment of the present application, the first positioning member and the second positioning member are symmetrically distributed relative to a perpendicular line between the center of the worm and the center line of the pump body.

[0024] In an exemplary embodiment of the present application, the ratio of the total cross-sectional area of ​​the air inlet to the total cross-sectional area of ​​the first air outlet is 0.8-2.0.

[0025] The beneficial effects of the present invention are:

[0026] Existing power tools have poor heat dissipation effects. The present application provides more air inlets by providing an air duct and at least two air inlets on the shell, which is more conducive to air entering the shell and improving the heat dissipation capacity. At the same time, multiple air inlets are provided. When a certain air inlet is completely or partially blocked by debris, weeds, etc., the remaining air inlets can still take in air along the air duct, thereby meeting the heat dissipation needs of the power tool and reducing the problem of over-temperature protection caused by the power tool being too high. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of an exemplary electric chain saw of the present application;

[0029] Figure 2 A front view of an exemplary electric chain saw of the present application;

[0030] Figure 3 For this application Figure 2 Schematic diagram of the BB section cut;

[0031] Figure 4 For this application Figure 2 Middle BB section cutaway view;

[0032] Figure 5 This is a schematic diagram of an exemplary motor and fan assembly of the present application;

[0033] Figure 6 This is a schematic diagram of an exemplary volute and fan structure of the present application;

[0034] Figure 7 This is a schematic diagram of another angle of an exemplary volute and fan after installation in this application;

[0035] Figure 8 This is a front view of an exemplary volute and fan after installation in this application;

[0036] Fig. 9 A top view of a partial structure of an exemplary electric chain saw of the present application;

[0037] Fig.10 For this application Fig. 9 Schematic diagram of the AA section cut;

[0038] Fig.11 For this application Fig. 9 Schematic diagram of the CC section cut;

[0039] Fig.12 For this application Fig.11 Enlarged view of area D in the middle;

[0040] Fig.13 This is a schematic diagram of the internal structure of a partial exemplary electric chain saw of the present application;

[0041] Fig.14 This is a schematic diagram of an exemplary partial housing structure of the present application;

[0042] Fig.15 This is a schematic diagram of an exemplary air guide portion of the present application;

[0043] Fig.16 This is a schematic diagram of a partial structure after the first shell of an exemplary embodiment of the present application is removed;

[0044] Fig.17 This is a schematic diagram of a partial structure after the upper shell of an exemplary application is removed;

[0045] Fig.18 A schematic diagram of the structure of the electric tool of the present application in one embodiment;

[0046] Fig.19 A schematic diagram of the coordination of the working part, the motor and the lubrication device of the electric tool of the present application in one embodiment;

[0047] Fig. 20 A schematic diagram of the coordination of the working part, the driving device and the lubricating device of the electric tool of the present application from another angle in one embodiment;

[0048] Fig.21 A schematic diagram of a partial structure of the electric tool of the present application in one embodiment;

[0049] Fig. 22 A schematic diagram of a partial structure of the electric tool of the present application in one embodiment;

[0050] Fig.23 This is a schematic diagram of the structure of an oil pump in one embodiment of the electric tool of the present application;

[0051] Fig.24 This is a schematic structural diagram of an oil pump from another angle in one embodiment of the electric tool of the present application;

[0052] Fig.25 This is a schematic structural diagram of the electric tool of the present application after the oil pump housing is removed in one embodiment;

[0053] Fig.26 This is a schematic front view of an oil pump in one embodiment of the electric tool of the present application;

[0054] Fig. 27 for Fig.26 Cross-section along EE direction;

[0055] Fig.28 A schematic diagram of the cooperation between a transmission plate and an output shaft in an embodiment of the electric tool of the present application;

[0056] Fig.29 This is a schematic diagram of the structure of a transmission plate in one embodiment of the electric tool of the present application;

[0057] Fig.30This is a schematic structural diagram of a transmission plate in another embodiment of the electric tool of the present application from another angle;

[0058] Fig.31 This is a schematic diagram of the structure of a worm in one embodiment of the electric tool of the present application;

[0059] Fig.32 for Fig.26 Cross-section along FF direction;

[0060] Fig.33 for Fig.26 Cross-section along GG direction;

[0061] Fig.34 This is a schematic diagram of the circuit connection between the control panel and various structures in one embodiment of the garden tool of the present application;

[0062] Fig.35 This is a schematic diagram of a partial structure of a garden tool of the present application in one embodiment;

[0063] Fig.36 for Fig.35 A partial enlarged schematic diagram of the middle I area;

[0064] Fig.37 This is a schematic cross-sectional axonometric diagram of the garden tool of this application along the center line of the integrated display module.

[0065] Component number description

[0066] 100, housing; 101, first housing; 102, second housing; 103, upper housing; 11, air duct; 110, air inlet; 111, confluence port; 1111, first air guide plate; 1112, second air guide plate; 112, filter device; 113, first air inlet; 114, second air inlet; 115, third air inlet; 116, fourth air inlet; 117, fifth air inlet; 120, first air outlet; 121, grille; 130, closed portion; 131, air blocking portion; 140, battery pack cavity; 141, battery pack; 142, wiring connection portion; 150, main handle; 151, brake handle; 160, auxiliary handle; 170, first accommodating cavity; 171, switch protection cover; 180, second accommodating cavity; 181, sunshade; 182, transparent cover; 190, third accommodating cavity; 191, positioning hole; 192, side cover;

[0067] 200, working part; 210, knife plate; 211, waist-shaped hole; 220, sprocket; 230, knife chain;

[0068] 300, motor; 310, housing; 320, output shaft; 321, flat connection surface.

[0069] 400, fan; 410, fan blade;

[0070] 500, volute; 510, second air outlet; 520, vortex; 530, air blocking plate;

[0071] 600, control panel; 610, heat dissipation column;

[0072] 700, air guide portion; 710, air guide inlet;

[0073] 800, lubrication device; 810, oil pump; 811, pump body; 8111, first positioning member; 8112, second positioning member; 8113, first mounting hole; 8114, second mounting hole; 8115, oil inlet; 8116, oil outlet; 812, transmission sheet; 8121, connecting hole; 8122, arc-shaped transition surface; 813, worm; 814, driving turbine; 815, transmission device; 8151, first protrusion; 8152, second protrusion; 820, oil pot; 830, oil inlet pipe; 840, oil outlet pipe; 850, adjustment device; 851, adjustment chamber; 852, adjustment rod; 8521, conical adjustment part; 853, limit rod; 854, elastic member; 855, limit ring;

[0074] 900, integrated display module; 910, handle heating switch; 911, switch button; 920, display panel; 921, power indicator light; 922, oil level indicator light; 923, fault alarm indicator light; 9231, fault warning light; 9232, fault category digital light; 924, power adapter light. DETAILED DESCRIPTION

[0075] The following is an explanation of the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific embodiments, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or according to the conditions recommended by the manufacturers.

[0076] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are familiar to those skilled in the art and the description of the present invention, and any methods, equipment and materials of the prior art similar or equivalent to the methods, equipment and materials described in the embodiments of the present invention can also be used to implement the present invention.

[0077] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" etc. used in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be regarded as the scope of implementation of the present invention.

[0078] See also Figure 1 to Figure 4 , Fig.10 The electric tool includes a housing 100, a control board 600, a working part 200, a motor 300, an air duct 11 and a fan 400. The housing 100 is provided with a battery pack cavity 140, and the battery pack cavity 140 is configured to install a battery pack; the control board 600 is provided in the housing 100; the working part 200 is provided in the housing 100; the motor 300 is provided in the housing 100, and the motor 300 drives the working part 200 to work; the air duct 11 is provided in the housing 100, and the air duct 11 is used to guide the air, and the air flow flows along the air duct 11 to take out the heat generated by the components in the housing 100, so as to achieve heat dissipation of the electric tool. The housing 100 is provided with at least two air inlets 110 and at least one first air outlet 120. By providing a plurality of air inlets 110, the air inlet channel can be effectively increased to prevent the air inlet 110 from being blocked by debris or blocked by mistake. The air duct 11 can still be used to effectively dissipate heat for the electric tool, thereby preventing the electric tool from overheating or malfunctioning. The fan 400 is fixed to the output shaft 320 of the motor 300, and drives the air to flow along the air duct 11 when rotating. The cold air flows in from the air inlet 110, passes through the components in the housing 100 that need to dissipate heat, and then flows out from the first air outlet 120, thereby achieving heat dissipation for the electric tool, controlling the temperature rise of the electric tool, and reducing the occurrence of overheating protection of the electric tool.

[0079] In an embodiment of the electric tool of the present application, the ratio of the total cross-sectional area of ​​the air inlet 110 to the total cross-sectional area of ​​the first air outlet 120 is 0.8 to 2.0. For example, the ratio can be any value between 0.8 and 2.0, such as 0.8, 1.0, 1.5, 2.0, etc., and the airflow can quickly enter from the air inlet 110 and flow out from the first air outlet 120 to ensure the heat dissipation capacity of the electric tool. Preferably, the ratio of the total cross-sectional area of ​​the air inlet 110 to the total cross-sectional area of ​​the first air outlet 120 is 1.2 to 1.4, and the ratio can be any value between 1.2 and 1.4, such as 1.2, 1.3, 1.4, etc., to ensure the rapid flow of the airflow.

[0080] See also Figure 1 In one embodiment of the electric tool of the present application, the shell 100 includes a first shell 101, a second shell 102 and an upper shell 103, wherein the first shell 101 and the second shell 102 are respectively arranged on both sides of the electric tool and extend toward the middle of the top surface of the electric tool to achieve the snap fit of the first shell 101 and the second shell 102, and the upper shell 103 is arranged on the upper rear side of the first shell 101 and the second shell 102, wherein the battery pack cavity 140 is arranged below the upper shell 103.

[0081] See also Figure 1 , Fig.18 In one embodiment of the electric tool of the present application, one end of the housing 100 away from the working part 200 is hollowed out to form a main handle 150 there, and the length direction of the main handle 150 is substantially parallel to the extension direction of the working part 200. The housing is fixed with an auxiliary handle 160 at the position where the working part 200 extends out of the housing 100. The arrangement of the main handle 150 and the auxiliary handle 160 can ensure the convenience of the operator holding the electric tool, and the stability can be ensured by holding with both hands.

[0082] See also Fig.17In one embodiment of the electric tool of the present application, a brake handle 151 is provided on the housing 100. The brake handle 151 is provided on the side of the auxiliary handle 160 away from the main handle 150. The brake handle 151 is used to brake the working part 200 of the electric tool. The brake handle 151 rotates relative to the housing 100. When the brake handle 151 is in a braking state, the working part 200 cannot be started or stopped; when the brake handle 151 is in a released state, the working part 200 can be started or kept working. For example, when the electric tool is an electric chain saw, when the brake handle 151 is in a braking state, the cutting component of the electric chain saw cannot be started or stopped for cutting; when the brake handle 151 is in a released state, the cutting component of the electric chain saw can be started or kept cutting. An indicator component is provided on the brake handle 151 and the housing 100 so that the operator can more clearly observe the state of the brake handle 151. In one embodiment, the brake handle 151 is provided with an indicator mark, and the housing 100 is provided with a sign. The indicator mark can also be a raised indicator mark in the shape of a triangle, an arrow or other shapes. The sign mark includes a brake symbol and a release symbol. The indicator mark points to different sign marks, corresponding to different states of the brake handle 151, so as to facilitate the operator to observe. In another embodiment, the brake handle 151 is provided with a sign mark, and the housing 100 is provided with an indicator mark. The indicator mark can also be a raised indicator mark in the shape of a triangle, an arrow or other shapes. The sign mark includes a brake symbol and a release symbol. The indicator mark points to different sign marks, corresponding to different states of the brake handle 151, so as to facilitate the operator to clearly understand the state of the brake handle 151. Preferably, the brake handle 151 is provided with an indicator mark, and the housing 100 is provided with a sign mark. The housing 100 has a large space to accommodate a large sign mark, so as to facilitate the operator to observe.

[0083] See also Figure 1 , Figure 2 , Fig.18Exemplarily, the air inlet 110 includes two or more of a first air inlet 113, a second air inlet 114, a third air inlet 115, a fourth air inlet 116 and a fifth air inlet 117. The shell 100 may be provided with the first air inlet 113, the second air inlet 114, the third air inlet 115, the fourth air inlet 116 and the fifth air inlet 117 at the same time, or may only be provided with two or three of the first air inlet 113, the second air inlet 114, the third air inlet 115, the fourth air inlet 116 and the fifth air inlet 117. The first air inlet 113 is arranged on the side wall of the housing 100, the second air inlet 114 is arranged on the bottom side wall of the battery pack cavity 140, the third air inlet 115 is arranged at the connection between the first housing 101 and the upper housing 103, the fourth air inlet 116 is arranged at the connection between the second housing 102 and the upper housing 103, the fifth air inlet 117 is arranged at the top of the side wall of the battery pack cavity 140 close to the control board 600, and the fifth air inlet 117 and the second air inlet 114 are arranged on two opposite side walls of the battery pack cavity 140. By setting multiple air inlets 110, a suitable air inlet 110 can be selected according to actual needs. At the same time, it can avoid debris, grass clippings, etc. blocking the air inlet 110, which can prevent the electric tool from being unable to dissipate heat normally, resulting in over-temperature protection or failure.

[0084] In an embodiment of the electric tool of the present application, a groove sunken into the shell 100 is provided at the connection between the first shell 101 and the upper shell 103, and the third air inlet 115 is provided at the inner top of the groove. The third air inlet 115 faces the bottom of the electric tool or substantially faces the bottom of the electric tool. The upper shell 103 can shield the third air inlet 115 to prevent rainwater and the like from entering the shell 100 through the third air inlet 115, and protect the electrical components and the like in the shell 100. On the one hand, the electric tool can be applied to more use environments and meet different use needs. On the other hand, it can reduce the corrosion of the electric components of the electric tool by rainwater, water vapor, etc., and improve the service life of the electric tool. Exemplarily, the structure of the fourth air inlet is similar to that of the third air inlet. The second shell 102 is also provided with a groove sunken into the shell 100, and the fourth air inlet 116 is provided at the inner top of the groove, so as to shield and protect the fourth air inlet.

[0085] In one embodiment of the electric tool of the present application, the side wall of the first housing 101 is provided with a recessed portion sunken into the housing 100, the first air inlet 113 is provided at the top of the recessed portion, the first air inlet 113 faces the bottom of the electric tool or substantially faces the bottom of the electric tool, and the side wall of the first housing 101 forms a protective shielding for the first air inlet 113, thereby preventing rainwater and debris from entering the housing 100 through the first air inlet 113, improving the waterproof and anti-debris capabilities of the electric tool, and improving the service life of the electric tool. , Exemplarily, the second air inlet 114 is provided at the bottom side wall of the battery pack cavity 140, and the airflow passes through the battery pack cavity 140 and then enters the housing 100 through the confluence 110, which can dissipate heat for the battery pack in the battery pack cavity 140, thereby preventing the battery pack from being overheated or damaged. The second air inlet is also provided with a shielding area to reduce rainwater, debris, etc. from entering the housing 100, improving the waterproof and anti-debris capabilities of the electric tool.

[0086] See also Fig. 9 , Fig.10 and Fig.18 In one embodiment of the electric tool of the present application, a confluence port 111 is provided in the air duct 11, and the airflow in at least two air inlets 110 converges into the confluence port 111, ensuring that when a single air inlet 110 is blocked, there is still a certain amount of airflow flowing into the housing 100 through the confluence port 111, ensuring the heat dissipation capacity and reducing the occurrence of overheating protection of the electric tool. In one embodiment, the housing 100 is provided with a first air inlet 113, a second air inlet 114, a third air inlet 115, a fourth air inlet 116, and a fifth air inlet 117, and the five air inlets 110 all converge into the confluence port 111, so as to effectively ensure that the airflow in the housing 100 flows according to the preset air duct 11, reduce the occurrence of turbulence, etc., and ensure that the air in the housing 100 can flow quickly.

[0087] See also Fig.10 and Fig.18 In one embodiment of the electric tool of the present application, the confluence port 111 is disposed between the battery pack cavity 140 and the control board 600. The airflow flowing through the battery pack cavity 140 can dissipate heat from the battery to prevent the battery pack from overheating. The confluence port 111 is disposed at the control board 600. The airflow with a lower temperature can effectively take away the heat from the control board 600, effectively controlling the temperature rise of the control board 600 and preventing the electronic components on the control board 600 from overheating and causing failure. Please refer to Figure 3-4 , Fig.10 and Fig.13 In one embodiment of the electric tool of the present application, a heat dissipation column 610 is provided on the back side of the control board 600. The heat dissipation column 610 is fixed on the control board 600 to increase the heat dissipation area. The gap between the heat dissipation columns 610 accommodates the air flow to ensure the heat dissipation effect.

[0088] See also Fig.10 In one embodiment of the electric tool of the present application, a second air guide plate 1112 is provided on one side of the control board 600 close to the battery pack cavity 140, and the second air guide plate extends in a direction away from the heat dissipation column 610. A heat dissipation column 610 is provided above the control board 600, and electronic components are installed on the side away from the heat dissipation column 610. The second air guide plate 1112 guides the airflow at the confluence port 111, so that the airflow moves along the second air guide plate 1112 toward the heat dissipation column 610, which can not only dissipate heat for the control board 600 in a timely manner, but also effectively protect the electronic components, thereby reducing the dust and the like that enters the housing 100 with the airflow and accumulates on the electronic components of the control board 600, reducing the failure rate of the electronic components, and improving the service life of the electric tool. Preferably, the second air guide plate 1112 is tilted, and the second air guide plate 1112 tilts from bottom to top toward the control board 600, which is conducive to the rapid movement of air along the second air guide plate 1112. A first air guide plate 1111 is arranged below the side of the fifth air inlet 117 close to the control panel 600. The first air guide plate 1111 is inclined from bottom to top from the fifth air inlet 1117 toward the control panel 60 to facilitate the airflow to move along the first air guide plate 1111 toward the top heat dissipation column 610 of the control panel 600.

[0089] In one embodiment of the electric tool of the present application, a filter device 112 is provided at the air inlet 110. The filter device 112 may be a filter net, filter cotton, etc. For the convenience of maintenance, a convenient quick-release structure is provided on the housing 100 to facilitate the disassembly and assembly of the filter device 112, and also to facilitate the assembly and use of the filter device 112 after dust removal. Preferably, the filter device 112 is a filter net to facilitate cleaning of the filter net. By providing the filter device 112, weeds, debris, etc. can be effectively filtered to prevent foreign matter from entering the housing 100, which may cause the electric tool to malfunction.

[0090] In another embodiment of the electric tool of the present application, a filter device 112 is provided at the confluence 111. The filter device 112 may be a filter net, filter cotton, etc., preferably a filter net, so as to facilitate the cleaning of the filter net. In order to facilitate maintenance, a convenient quick-release structure is provided on the housing 100 to facilitate the disassembly and assembly of the filter device 112, and also to facilitate the assembly and use of the filter device 112 after dust removal. By providing the filter device 112, weeds, debris, etc. can be effectively filtered to prevent foreign matter from entering the housing 100 through the confluence 111, causing problems such as control panel failure or motor failure of the electric tool. Exemplarily, the confluence 111 and the air inlet 110 can both be provided with a filter device 112 to further ensure the filtering effect.

[0091] See also Fig.10 , Fig.13 , Fig.15In one embodiment of the electric tool of the present application, an air guide portion 700 is provided in the shell 100 and is covered outside the motor 300. The air guide portion 700 is provided between the confluence port 111 of the air duct 11 and the first air outlet 120. The air guide portion 700 cooperates with the shell 100 to isolate the motor 300 from other components in the shell 100, thereby preventing the heat of the motor 300 from affecting other components of the electric tool and ensuring that the airflow flows through the motor 300 via the air guide portion 700 and flows out from the first air outlet 120.

[0092] See also Fig.13 , Fig.15 For example, an air guide inlet 710 is provided on the air guide portion 700, and the air guide inlet 710 and the confluence port 111 are respectively arranged on both sides of the control board 600. After the air flow passes through the confluence port 111, the heat on the control board 600 is taken away, and the air flow then enters the air guide portion 700 through the air guide inlet 710 until it flows out of the housing 100 through the first air outlet 120.

[0093] In one embodiment of the electric tool of the present application, a handle heating plate is also provided in the shell 100, and the air guide inlet 710 is provided at the handle heating plate, which can quickly remove the heat from the handle heating plate, thereby reducing the influence of the heat emitted from the handle heating plate into the shell 100 on other components in the shell 100.

[0094] See also Fig.10 After the airflow enters the housing 100 through the air inlet 110, the airflow converges at the confluence port 111, and then passes through the control board 600 and the handle heating plate in sequence into the air guide portion 700, and then passes through the motor 300 and the fan 400 in the air guide portion 700 to make the airflow flow out from the first air outlet 120, thereby effectively controlling the temperature in the housing 100 and avoiding the overheating protection of the power tool.

[0095] See also Fig.13 , Fig.16 In one embodiment of the electric tool of the present application, the electric tool is provided with a plurality of wire connection parts 142 for connecting the wire harness, and the wire connection parts 142 are all provided on the visible surface of the electric tool after the first housing 101 is removed. In other words, after the first housing 101 is removed from the electric tool, the wire connection parts 142 in the electric tool can be observed. On the one hand, during the assembly process, it is possible to quickly and accurately check whether the wiring of the wire connection parts 142 is connected perfectly and accurately; on the other hand, during maintenance, it is possible to quickly troubleshoot the connection fault of the line, thereby quickly determining the cause of the fault and improving the efficiency of maintenance and repair. Preferably, a wire harness clip is also fixed on the visible surface, and the wire connection part 142 is fixed at a fixed position on the visible surface, so as to facilitate assembly inspection.

[0096] See also Fig.13 , Fig.16 For example, the battery pack cavity 140 is fixed on the housing 100, and the wire connection portion 142 is disposed on the side wall of the battery pack cavity 140 near the second housing 102. There are many components inside the housing 100, and the side wall of the battery pack cavity 140 is relatively flat, and other components are usually not fixed on the side wall of the battery pack cavity 140. By fixing the wire connection portion 142 on the side wall of the battery pack cavity 140, it is convenient to observe the wiring, thereby facilitating assembly inspection and troubleshooting.

[0097] See also Figure 5 In an exemplary embodiment of the present application, the motor 300 includes a housing 310, and the fan 400 includes a blade 410. The outer diameter of the blade 410 is larger than the outer diameter of the housing 310, which increases the ratio of the heat dissipated by the fan 400 to the heat generated by the motor 300, and effectively controls the operating temperature rise of the motor 300. The blade 410 with a larger outer diameter drives a larger amount of air flow, thereby improving the heat dissipation effect of the power tool, effectively controlling the operating temperature rise of the power tool, and reducing the occurrence of over-temperature protection of the power tool. The product selection is smaller and lighter motor, and can output greater power and stronger load capacity, thereby obtaining a more ideal energy efficiency ratio.

[0098] In the embodiment of the electric tool of the present application, the outer diameter of the housing 310 of the motor 300 ranges from 25 to 75 mm, and the outer diameter of the housing 310 can be any value between 25 and 75 mm, such as 25 mm, 40 mm, 50 mm, 75 mm, etc., which can effectively ensure that the power of the motor 300 meets the use requirements. In the embodiment of the electric tool of the present application, the ratio of the outer diameter of the fan blade 410 to the outer diameter of the housing 310 is 1.2 to 2.0, which not only effectively improves the heat dissipation effect of the electric tool and reduces the overheating protection of the electric tool, but also avoids the problem of excessive energy consumption caused by the outer diameter of the fan blade 410 being too large, and reduces the energy consumption of the fan 400 while ensuring the heat dissipation capacity. The ratio can be any value between 1.2 and 2.0, such as 1.2, 1.5, 1.8, 2.0, etc. Preferably, the ratio of the outer diameter of the fan blade 410 to the outer diameter of the casing 310 is 1.3-1.5, which effectively reduces the temperature rise of the motor 300 and effectively controls the energy consumption of the fan 400. The ratio can be any value between 1.3 and 1.5, such as 1.3, 1.4, 1.5, etc.

[0099] Exemplarily, the fan 400 may be radial or axial, or a combination of radial and axial. The shape of the blade 410 may be any one of a forward-leaning blade 410, an inline blade 410, and a backward-leaning blade 410, or other existing blade 410 shapes.

[0100] See also Figure 3 , Figure 4 , Figure 6 to Figure 8In an embodiment of the electric tool of the present application, the electric tool also includes a volute 500, which is mounted on the outside of the fan 400. A second air outlet 510 is provided on the volute 500, and the second air outlet 510 is provided at the first air outlet 120. The volute 500 concentrates and guides the gas leaving the fan blade 410, so that the airflow is discharged to the outside of the shell 100 after passing through the second air outlet 510 and the first air outlet 120.

[0101] See also Figure 6 to Figure 8 Exemplarily, the volute 500 is provided with a vortex 520. Preferably, the vortex 520 of the volute 500 is a gradually opening vortex 520. The vortex 520 gradually widens through a spiral along the rotation direction of the fan 400. By widening the vortex 520 along the rotation direction of the fan 400, on the one hand, it is convenient to guide the airflow; on the other hand, it is convenient for the airflow driven by the fan blades 410 to flow out quickly, thereby improving the exhaust and heat dissipation capacity.

[0102] See also Figure 6 to Figure 8 In one embodiment of the electric tool of the present application, the vortex 520 at least partially deepens gradually along the rotation direction of the fan 400 toward the motor 300, and the vortex 520 deepens to terminate at the second air outlet 510. By deepening the vortex 520 toward the motor 300, on the one hand, the cross-sectional area of ​​the second air outlet 510 can be effectively increased, which is convenient for the rapid outflow of airflow and improves the heat dissipation effect; on the other hand, the vortex 520 deepens toward the motor 300, and the baffle of the vortex 520 close to the fan blade 410 can block the fan blade 410 and the vortex 520, so that when the airflow flows from the vortex 520 to the second air outlet 510, the airflow entering the fan blade 410 is reduced, thereby reducing the backflow of hot air flow and improving the heat dissipation capacity and heat dissipation effect.

[0103] See also Figure 6 to Figure 8 , Figure 11-12 In an embodiment of the electric tool of the present application, a wind-blocking plate 530 is provided at the second air outlet 510. The wind-blocking plate 530 extends in the opposite direction of the rotation direction of the fan 400 along the volute 500. By providing the wind-blocking plate 530, the backflow of the heat dissipation airflow can be reduced, thereby improving the heat dissipation capacity. Exemplarily, the wind-blocking plate 530 extends toward the housing 100 until it contacts the housing 100, so that the vortex 520 at the second air outlet 510 is isolated from the fan blade 410, thereby effectively reducing the airflow with heat being brought back by the fan blade 410, thereby improving the heat dissipation effect.

[0104] Exemplarily, a perpendicular line through the end face of the air blocking plate 530 passes through the center of the fan 400. In other words, the air blocking plate 530 extends in the opposite direction of the rotation direction of the fan 400 to a point nearly tangent to the fan blade 410, thereby effectively ensuring the air blocking effect of the air blocking plate 530 and preventing the airflow from being re-sucked into the fan 400.

[0105] In an embodiment of the electric tool of the present application, the gap between the end of the air blocking plate 530 close to the fan blade 410 and the outer diameter of the fan blade 410 is 1 to 8 mm. In other words, the gap between the projection of the air blocking plate 530 along the rotation axis of the fan blade 410 and the projection of the fan blade 410 along the rotation axis of the fan blade 410 is 1 to 8 mm, which can effectively ensure the air blocking effect of the air blocking plate 530, and at the same time reserve enough matching gap to avoid interference between the fan blade 410 and the air blocking plate 530 due to processing errors and other reasons. The gap can be any value between 1 and 8 mm, such as 1 mm, 2 mm, 5 mm, 8 mm, etc.

[0106] See also Fig.14 In an embodiment of the electric tool of the present application, a closing portion 130 is provided on the housing 100, and the closing portion 130 cooperates with the volute 500, so that the vortex 520 is isolated from other areas in the housing 100, effectively ensuring that the fan 400 drives the airflow through the vortex 520 and then discharges it from the second air outlet 510, preventing the airflow with heat from re-entering the housing 100 and affecting the heat dissipation effect. A wind-blocking portion 131 is provided on the closing portion 130, and the wind-blocking portion 131 cooperates with the wind-blocking plate 530, so that the second air outlet 510 and the vortex 520 where the wind-blocking plate 530 is set are isolated from the fan blade 410, preventing the airflow at the second air outlet 510 from being sucked in by the fan 400 again, effectively ensuring that the airflow can stably flow out through the second air outlet 510 and the first air outlet 120, and improving the heat dissipation effect.

[0107] See also Figure 18 to Figure 20 In one embodiment of the electric tool of the present application, the working part 200 includes a cutting assembly, which includes a knife plate 210, a knife chain 220 and a knife chain 230. The knife chain 220 is coaxially fixed with the output shaft 320 of the motor 300. One end of the knife plate 210 is fixed on the housing 100 and is located near the knife chain 220. The other end of the knife plate 210 extends to the outside of the housing 100. For example, a waist-shaped hole 211 is opened at one end of the knife plate 210 near the knife chain 220. The length direction of the waist-shaped hole 211 is parallel to the length direction of the knife plate 210. The knife plate 210 is fixed to the housing 100 by passing a bolt through the waist-shaped hole 211. The knife chain 230 is arranged around the outer edge of the knife plate 210, and a part of the knife chain 230 is engaged with the knife chain 220. Under the drive of the knife chain 220, the knife chain 230 can rotate at a high speed to perform cutting operations. Preferably, a side cover 192 is fixed to the housing 100 at a position corresponding to the connection of the blade plate 210 , and the stability of the installation of the blade plate 210 is ensured by clamping one end of the blade plate 210 between the housing 100 and the side cover 192 .

[0108] The electric tool also includes a lubricating device 800, which can provide lubricating oil for the cutting assembly 200. The lubricating oil can not only lubricate the knife chain and reduce the friction heat generated by the knife chain 230, but also take away part of the heat on the knife chain 230, so that it can work for a long time. The lubricating device 800 includes an oil pump 810 and an oil pot 820. The oil pump 810 is arranged inside the housing 100. For example, one side of the housing 100 is recessed inward to form a third accommodating chamber 190 for installing the oil pump 810. The oil pump 810 is fixed in the third accommodating chamber 190. The oil pot 820 is installed in the housing 100 and is located on one side of the oil pump 810. The oil pot 820 contains lubricating oil or other cooling liquids such as cooling oil. The oil pump 810 can transport the lubricating oil in the oil pot 820 to the cutting assembly 200 to cool or lubricate its knife chain.

[0109] See also Fig. 20 , Figure 23 to Figure 25 Specifically, the oil pump 810 includes a pump body 811, a transmission plate 812 and a worm gear 813, wherein a driving turbine 814 is provided inside the pump body 811, and an oil inlet 8115 and an oil outlet 8116 which are connected to the interior are provided on the outer shell of the pump body 811, the oil inlet 8115 and the oil outlet 8116 are relatively arranged on the same side of the pump body 811 and are separated by the driving turbine 814, the oil inlet 8115 is connected to the oil pot 820 through the oil inlet pipe 830, and the oil outlet 8116 is connected to the cutting assembly 200 through the oil outlet pipe 840. The transmission plate 812 and the worm 813 are coaxially arranged on the output shaft 320. The transmission plate 812 is fixedly connected to the output shaft 320. The worm 813 penetrates the upper part of the outer shell of the pump body 811 and meshes with the driving turbine 814. A transmission device 815 for driving the worm 813 to rotate is arranged between the worm 813 and the transmission plate 812, so that the output shaft 320 drives the transmission plate 812 to rotate while driving the driving turbine 814 to rotate, and the lubricating oil inside the oil pot 820 is delivered to the cutting assembly 200 to realize the oil pumping process. In the present application, the transmission plate 812 is coaxially fixed to the output shaft 320 of the motor 300, and the motor 300 drives the oil pump 810 to work normally. This structural setting method can reduce the overall weight and volume of the power tool, thereby reducing the manufacturing cost; on the other hand, removing the driving motor in the oil pump 810 can reduce the internal heat source, thereby reducing the performance requirements of the power tool for the heat dissipation device.

[0110] See also Fig.19 , Figure 26 to Figure 29In one embodiment, the transmission sheet 812 is disposed between the knife chain 220 and the motor 300, and is coaxially fixed with the output shaft 320. For example, two mutually parallel flat connection surfaces 321 are provided at the connection between the output shaft 320 and the transmission sheet 812, and a connection hole 8121 matching the flat connection surface 321 is provided on the transmission sheet 812, and the flat transmission between the output shaft 320 and the transmission sheet 812 is realized through the connection hole 8121 and the flat connection surface 321. Preferably, an arcuate transition surface 8122 is provided at the corner of the connection hole 8121 corresponding to the flat connection surface 321, and the connecting side edge of the flat connection surface 321 and the arcuate surface of the output shaft 320 is clamped on the inner side of the arcuate transition surface 8122, which can effectively prevent the transmission sheet 812 and the output shaft 320 from sliding and failing to maintain synchronous rotation.

[0111] See also Fig. 27 , Fig.30 and Fig.31 In one embodiment, the transmission device 815 between the transmission plate 812 and the worm 813 includes a first protrusion 8151 and a second protrusion 8152. The first protrusion 8151 is arranged on the end surface of the worm 813 facing the transmission plate 812, and the second protrusion 8152 is arranged on the end surface of the transmission plate 812 facing the worm 813. The first protrusion 8151 and the second protrusion 8152 are arranged alternately. When the transmission plate 812 rotates, the second protrusion 8152 pushes the first protrusion 8151 to rotate, thereby driving the worm 813 to rotate. Here, there is no restriction on the number of the first protrusion 8151 and the second protrusion 8152. One or more can be set. It is only necessary to ensure that the first protrusion 8151 and the second protrusion 8152 are arranged alternately and the first protrusion 8151 and the second protrusion 8152 interfere with each other. In this embodiment, two first protrusions 8151 are arranged opposite to each other on the worm 813, and two second protrusions 8152 are arranged opposite to each other on the transmission sheet 812. The two first protrusions 8151 and the two second protrusions 8152 are arranged crosswise.

[0112] See also Fig.21 , Fig.25 and Fig.26 In order to ensure the meshing accuracy between the worm 813 and the driving turbine 814 , the present application provides a positioning piece on the outer shell of the pump body 811 to accurately locate the installation position of the pump body 811 .

[0113] In one embodiment, the outer shell of the pump body 811 is provided with a first positioning member 8111 and a second positioning member 8112, and the center line of the first positioning member 8111 and the second positioning member 8112 is staggered with the center line of the pump body 811, that is, the center line of the first positioning member 8111 and the second positioning member 8112 does not coincide with the center line of the pump body 811. This design can make the installation structure of the pump body 811 more stable. Further, the first positioning member 8111 and the second positioning member 8112 are symmetrically distributed relative to the center of the worm 813 and the vertical line of the center line of the pump body 811. The first positioning member 8111 and the second positioning member 8112 can be positioning pins protruding from the surface of the pump body 811, and the third accommodating chamber 190 is correspondingly provided with a positioning hole 191 that cooperates with the positioning pin. The positioning hole 191 can be a through hole or a blind hole, which is not limited here. In other embodiments, the first positioning member 8111 and the second positioning member 8112 may also be grooves sunken into the interior of the pump body 811, and a protrusion matching the above-mentioned grooves is correspondingly provided in the third accommodating cavity 190, and the pump body 811 can also be positioned by utilizing the cooperation between the protrusion and the groove.

[0114] See also Fig.26 , at least one mounting hole is further provided on the pump body 811, which is used to fix the pump body 811 in the third accommodating chamber 190. In this embodiment, a first mounting hole 8113 and a second mounting hole 8114 are provided on the pump body 811, and the first mounting hole 8113 and the second mounting hole 8114 are symmetrically distributed relative to the center of the worm 813. The uniform distribution of the first mounting hole 8113, the second mounting hole 8114, the first positioning member 8111 and the second positioning member 8112 can improve the defects of the combination deviation of the center of the asymmetric worm, or the poor stability and durability, and improve the stability of the installation of the pump body 811 and the reliability of the product.

[0115] See also Fig.23 , Fig.25 , Fig.32 , Fig.33In one embodiment, the oil pump 810 further includes an adjusting device 850 for adjusting the oil output, the adjusting device 850 includes an adjusting chamber 851, an adjusting rod 852, a limiting rod 853 and a limiting assembly, the adjusting chamber 851 is arranged on a side of the pump body 811 away from the oil inlet 8115 and the oil outlet 8116, and is communicated with the inner cavity of the pump body 811, the adjusting rod 852 passes through the adjusting chamber 851 from bottom to top, and a conical adjusting portion 8521 is provided on the adjusting rod 852, and the conical adjusting portion 8521 is located in the adjusting chamber The adjusting rod 852 is inside the adjusting chamber 851 and can be stopped in the adjusting chamber 851. The gap between the conical adjusting portion 8521 and the adjusting chamber 851 can be adjusted by rotating the adjusting rod 852, thereby adjusting the oil output of the oil pump 810. The limiting rod 853 is passed through the upper end of the adjusting rod 852 and is stopped on the pump body 811. Accordingly, the upper end surface of the pump body 811 is circumferentially provided with a plurality of limiting grooves around the adjusting rod 852. The limiting rod 853 is clamped in its limiting groove every time it is rotated, thereby ensuring that the adjusting rod 10 can be stable after being rotated. The limiting assembly is arranged at one end of the adjusting rod 852 away from the limiting rod 853, and includes a limiting ring 855 and an elastic member 854. The limiting ring 855 is fixedly arranged on the adjusting rod 852. For example, a clamping groove is arranged on the adjusting rod 852 along the circumferential direction, and the limiting ring 855 is installed in the clamping groove. The elastic member 854 is sleeved on the adjusting rod 852 and abuts against the limiting ring 853. The limiting ring 855 and the limiting rod 852 form an elastic limit of the adjusting rod 852, so that the adjusting rod 852 can only rotate left and right but not move up and down. The adjusting rod 852 can be adjusted according to the actual required oil output. When the adjusting rod 852 is rotated, the limiting rod 853 will rotate accordingly and be clamped on the upper end surface of the pump body 811, so as to ensure that the adjusting rod 852 can be stable after being rotated, and its stability is further enhanced under the action of the elastic member 854.

[0116] See also Fig.23 In order to facilitate rotation, an adjustment groove 8522 is provided on the lower end surface of the adjustment rod 852. An adjustment portion (not shown in the figure) compatible with the adjustment groove 8522 can be provided below the adjustment rod 852. The adjustment portion is, for example, an adjustment knob. Inserting the adjustment knob into the adjustment groove 8522 to rotate the adjustment rod 852 can greatly improve its steering force, making it easier for the user to adjust the oil output.

[0117] See also Figure 1 and Fig.35In one embodiment, the integrated display module 900 includes a handle heating switch 910 and a display panel 920. The display panel 520 is used to display the functional status of the garden tool. The display panel 520 is provided with a plurality of indicator lights for displaying the functional status of the garden tool. The user can understand the functional status of the garden tool through the display panel 920. For convenient operation and observation, the display panel 920 is arranged on the outer surface of the housing 100 between the battery pack cavity 130 and the first handle 110. The handle heating switch 910 is a device for controlling the heating of the handle, which can be arranged at any position of the housing 100 that is convenient for operation, such as on the main handle 150 or on the outer surface of the housing 100 between the battery pack cavity 140 and the main handle 150; preferably, the handle heating switch 910 is arranged beside the display panel 920, so as to facilitate synchronous operation with the display panel 920. When the handle heating switch 910 is turned on, the main handle 150 and / or the auxiliary handle 160 can be heated. .

[0118] See also Figure 1 , Fig.34 and Fig.35 In one embodiment, the housing 100 is provided with a first accommodating cavity 170 and a second accommodating cavity 180 at a position corresponding to the integrated display module 900, the handle heating switch 910 is installed in the first accommodating cavity 170, and the display panel 920 is installed in the second accommodating cavity 180. The first accommodating cavity 170 and the second accommodating cavity 180 can be integrated together, that is, a cavity is provided on the outer surface of the housing 100, and the cavity is provided with installation positions for installing the handle heating switch 910 and the display panel 920 respectively; the first accommodating cavity 170 and the second accommodating cavity 180 can also be independently provided, for example, side by side on the housing 100 between the main handle 150 and the battery pack cavity 140, or provided at different positions of the housing 100, which can be determined according to the installation positions of the handle heating switch 910 and the display panel 920.

[0119] See also Figure 36-37 In one embodiment, the integrated display module 500 further includes a shading plate 181 and a transparent cover 182. The shading plate 181 sequentially covers the outer side of the display panel 920 to block external light sources and prevent the indicator light on the display panel 920 from being unclear due to interference from external light. The transparent cover 182 is arranged on the outer side of the shading plate 181 to play a certain protective role and prevent the display panel 920 from being damaged.

[0120] See also Fig.35In one embodiment, in order to facilitate the operator to touch the switch, the handle heating switch 910 is a push-button switch, and its switch button 911 has an elastic self-resetting feature. The switch button 911 can be in the form of a spherical button, a cylindrical button, etc. In this embodiment, the switch button 911 is a soft button, and pressing the switch button 911 can activate the heated handle or turn off the heated handle. Furthermore, the handle heating switch 910 is provided with a first gear, a second gear, and a third gear. When the handle heating switch 910 is in the first gear, the main handle 150 can be heated; when the handle heating switch 910 is in the second gear, the auxiliary handle 160 can be heated; when the handle heating switch 910 is in the third gear, the main handle 150 and the auxiliary handle 160 can be heated at the same time.

[0121] Preferably, the handle heating switch 910 also includes a heating indicator light (not shown in the figure), which can be set on the handle heating switch 910 or beside the handle heating switch 910, or integrated on the display panel 920. When the handle heating switch 910 is turned on, the heating indicator light is on. Furthermore, the heating indicator light can select different colors of lights to correspond to different gears, for example, a green light corresponds to the first gear, a yellow light corresponds to the second gear, a red light corresponds to the third gear, and so on. In this way, the gear of the handle heating switch 910 can be known by observing the color of the light.

[0122] See also Fig.35 In one embodiment, the display panel 920 is provided with a power indicator light 921, an oil level indicator light 922, and a fault alarm indicator light 923. The power indicator light 921 is used to display the switch status of the power supply (battery pack). When the power is turned on, the power indicator light 921 is on; when the power is turned off, the power indicator light 921 is off. The oil level indicator light 922 is used to display the oil level in the oil pot 820 of the lubrication device 800. The control panel 600 controls the opening and closing of the oil level indicator light 922 according to the oil level feedback from the oil level sensor 821 on the oil circuit of the oil pot 820. The oil level indicator light 922 can light up when there is a lack of oil, or when there is no lack of oil, and can also display different colors of lights when there is a lack of oil or when there is no lack of oil. For example, when there is a lack of oil, the oil level indicator light 922 shows a red light; when there is no lack of oil, the oil level indicator light 922 shows a green light.

[0123] The fault alarm indicator light 523 is used to receive the corresponding fault issued by the control board 600 and issue an alarm. The fault alarm indicator light 923 includes a fault warning light 9231 and a fault category digital light 9232. When a fault occurs during product operation, the fault warning light 9231 flashes, and the control board will self-check and issue the cause of the fault. At this time, the fault category digital light 9232 will display the fault category number. The user can refer to the manual to know the fault type corresponding to different numbers, and the user can perform maintenance according to the fault type.

[0124] In one embodiment of the electric tool of the present application, the fault warning light 9231 flashes for different times, corresponding to different error codes. If the fault warning light 9231 flashes 2 short times, the fault category digital light 9232 will display the fault category number 2, indicating that the controller self-test failed, the control board self-test did not pass, the motor stopped and reported an error, and the solution is to unplug the battery pack and restart. If the problem persists, replace the controller; if the fault warning light 9231 flashes 3 short times, the fault category digital light 9232 will display the fault category number 3, indicating that the battery pack communication is abnormal, the communication between the battery pack and the control board cannot be connected, or the connection is suddenly interrupted during normal communication. The solution is to unplug the battery pack and restart. If the problem persists, replace the controller; if the fault warning light 9231 flashes 4 short times, the fault category digital light 9232 will display the fault category number 4, indicating overcurrent protection. When the motor is running, the phase line current exceeds the set protection value, or the bus current exceeds the set protection value. The solution is to release the trigger and restart the machine; if the fault warning light 9231 flashes 5 short times, the fault category Special digital light 9232 will display fault category number 5, indicating low input voltage, battery pack voltage is lower than motor starting voltage, or battery voltage is lower than minimum working voltage during motor operation. The solution is to replace fully charged battery pack; if fault warning light 9231 flashes 6 short times, fault category digital light 9232 will display fault category number 6, indicating high temperature protection of controller, temperature of controller exceeds set protection value when working, the solution is to wait for controller temperature to cool down and use the machine again; if fault warning light 9231 flashes 7 short times, fault category digital light 9232 will display fault category number 7, indicating motor stall, motor out of step, abnormal Hall signal of motor, resistance encountered when motor starts or runs, and motor fails to continue to run; commutation error occurs when motor starts or runs, and motor fails to continue to run; there is Hall sensor motor, Hall signal is abnormal, the solution is to release the trigger and restart the machine. If the problem persists, replace the controller. If the fault warning light 9231 flashes 8 shorts, the fault category digital light 9232 will display the fault category number 8, which means that the switch logic is abnormal. When starting the machine, the sequence of the keys is incorrect, or some keys are invalid. The solution is to release the trigger and restart the machine in the correct order. If the problem persists, replace the controller. If the fault warning light 9231 flashes 9 shorts, the fault category digital light 9232 will display the fault category number 9, which means a software authentication error. When the software authentication code is running, an MCU abnormality is detected. The solution is to unplug the battery pack and restart. If the problem persists, replace the controller. If the fault warning light 9231 flashes 10 shorts, the fault category digital light 9232 will display the fault category number 10, which means the motor is over-temperature protected. When the motor is working or starting, the motor temperature exceeds the set protection value. The solution is to wait for the motor temperature to cool down and use the machine again.If the fault warning light 9231 flashes 1 long and 1 short, the fault category digital light 9232 will display the fault category number 11, which means the battery pack is in high temperature protection. The control board detects that the battery pack temperature exceeds the set protection value. The solution is to wait for the battery pack temperature to cool down, or use a new battery pack and use the machine again. If the fault warning light 9231 flashes 1 long and 2 short, the fault category digital light 9232 will display the fault category number 12, which means the motor is in low speed protection. When the actual motor speed is less than the set minimum speed, the motor stops and reports an error; the solution is to release the trigger and restart the machine. If the fault warning light 9231 flashes 1 long and 3 short, the fault category digital light 9232 will display the fault category number 13, which means the parallel board (PMU) is abnormal, the parallel board communication is abnormal, or the parallel board is abnormal. The solution is to unplug the battery pack and restart; if the problem persists, replace the controller.

[0125] See also Fig.35 In one embodiment, the display panel 920 is also provided with a power adapter light 924 and a Bluetooth indicator light (not shown in the figure). The power adapter light 924 is used to detect whether the capacity of the battery pack 141 is compatible with the garden tool. When the capacity of the battery pack 141 does not match the garden tool, it will light up or flash to serve as a warning; the Bluetooth indicator light is used to display the on and off status of the Bluetooth module of the garden tool. When the Bluetooth indicator light is on, it can be connected to a mobile phone, a computer or a remote wireless network, and the user can realize operation monitoring and fault query machine maintenance instructions. In other embodiments, the display panel 920 can also add other modules according to the needs of different customers, such as lighting, power display, power display, current display, speed display, etc. Correspondingly, the display panel 920 will be additionally provided with a lighting indicator light, a power indicator light, a power indicator light, a current indicator light, and a speed indicator light. The modules listed above can be selected from one or more, depending on the actual needs of the user.

[0126] See also Fig.35 The display modules on the display panel 920 can be collectively shared and lighted up independently for display. At the same time, they can also light up in different colors to indicate different operating states. It is also possible to set up multi-screen and multi-combination module displays according to the model and user requirements, or to display specific buttons, keys, toggles, and touch starts independently and in different positions, etc., without limitation. The integrated or multi-combination, multi-unit control of the display panel 920 can be achieved through independent sensing responses, or through PCBA control and on-demand programming display. The specific control process can refer to the control program in the prior art, which will not be elaborated here.

[0127] The present invention provides an electric tool, which has the beneficial effects of improving heat dissipation effect, reducing over-temperature protection of electric tools, improving poor positioning accuracy during installation of oil pumps, and facilitating display. Therefore, the present invention effectively overcomes some practical problems in the prior art and has high utilization value and use significance. The above embodiments are only illustrative of the principles and effects of the present invention, and are not used to limit the present invention. Anyone familiar with this technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An electric tool, characterized in that: include: A housing, wherein a battery pack cavity is disposed on the housing and the battery pack cavity is configured to install a battery pack; A control panel is disposed in the housing; A working part, arranged on the housing; A motor is disposed in the housing, and drives the working part to work; an air duct, disposed in the housing, for dissipating heat from the electric tool; A fan, fixed to the output shaft of the motor, to drive air to flow along the air duct when rotating; Wherein, at least two air inlets and at least one first air outlet are arranged on the shell, and the air duct is arranged between the air inlets and the first air outlet.

2. The electric tool according to claim 1, characterized in that: A confluence port is provided in the air duct, and airflows in at least two air inlets converge into the confluence port.

3. The electric tool according to claim 2, characterized in that: The confluence port is arranged between the battery pack cavity and the control board.

4. The electric tool according to claim 3, characterized in that: A heat dissipation column is arranged on the back side of the control panel, a first air guide plate is arranged below the confluence, a second air guide plate is arranged on the side of the control panel close to the confluence, the second air guide plate extends away from the heat dissipation column, and both the first air guide plate and the second air guide plate allow the airflow to flow toward the heat dissipation column.

5. The electric tool according to claim 2, characterized in that: A filtering device is arranged at the air inlet.

6. The electric tool according to claim 2, characterized in that: An air guide portion is arranged in the shell and covers the outside of the motor. The air guide portion is arranged between the confluence port of the air duct and the first air outlet.

7. The electric tool according to claim 6, characterized in that: The air guide portion is provided with an air guide inlet, and the air guide inlet and the confluence port are respectively arranged on two sides of the control panel.

8. The electric tool according to claim 1, characterized in that: The shell includes a first shell, a second shell and an upper shell, the upper shell is arranged above the battery pack cavity, and the air inlet includes two or more of a first air inlet arranged on the side wall of the shell, a second air inlet arranged on the bottom of the battery pack cavity, a third air inlet arranged at the connection between the first shell and the upper shell, a fourth air inlet arranged at the connection between the second shell and the upper shell, and a fifth air inlet arranged on the top of the side wall of the battery pack cavity.

9. The electric tool according to claim 8, characterized in that: A groove sunken into the shell is provided at the connection between the first shell and the upper shell, and the third air inlet is provided at the inner top of the groove.

10. The electric tool according to claim 1, characterized in that: The housing comprises a first housing and a second housing. A plurality of wire connection parts for connecting a wire harness are arranged in the electric tool. The wire connection parts are all arranged on a visible surface of the electric tool after the first housing is removed.

11. The electric tool according to claim 10, characterized in that: The battery pack cavity is fixed on the shell, and the wire connecting portion is arranged on a side wall of the battery pack cavity close to the second shell.

12. The electric tool according to claim 1, characterized in that: The motor comprises a housing, the fan comprises blades, and the outer diameter of the blades is greater than the outer diameter of the housing.

13. The electric tool according to claim 12, characterized in that: The electric tool also includes a volute, which is sleeved outside the fan. The volute is provided with a vortex, and the vortex gradually widens along the rotation direction of the fan. The volute is provided with a second air outlet, and the second air outlet is arranged at the first air outlet.

14. The electric tool according to claim 13, characterized in that: An air blocking plate is provided at the second air outlet, and the air blocking plate extends along the second air outlet of the volute in the opposite direction of the rotation direction of the fan.

15. The electric tool according to claim 14, characterized in that: A perpendicular line of the air-blocking plate passing through the end surface of the air-blocking plate passes through the center of the fan.

16. The electric tool according to claim 1, characterized in that: The working part includes a cutting assembly; the electric tool also includes: A lubricating device is disposed in the housing, the lubricating device comprises an oil pump and an oil pot, one end of the oil pump is connected to the oil pot, and the other end of the oil pump is connected to the cutting assembly; The oil pump comprises a pump body, on which a first positioning member and a second positioning member are provided, and a center line connecting the first positioning member and the second positioning member is offset from a center line of the pump body; and at least one mounting hole is also provided on the pump body.

17. The electric tool according to claim 16, characterized in that: The first positioning member and the second positioning member are positioning pins protruding from the surface of the pump body, and the housing is correspondingly provided with positioning holes that cooperate with the positioning pins.

18. The electric tool according to claim 16, characterized in that: The oil pump also includes a transmission plate and a worm, wherein the transmission plate is coaxially fixed with the output shaft of the motor, the worm is coaxially arranged with the transmission plate and meshedly connected with the driving turbine in the pump body, and a transmission device for driving the worm to rotate is provided between the worm and the transmission plate.

19. The electric tool according to claim 18, characterized in that: The first positioning member and the second positioning member are symmetrically distributed relative to a perpendicular line between the center of the worm and the center line of the pump body.

20. The electric tool according to claim 1, characterized in that The ratio of the total cross-sectional area of ​​the air inlet to the total cross-sectional area of ​​the first air outlet is 0.8 to 2.0.

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