Electric tool

Abstract

The utility model provides an electric tool which comprises a shell, a motor and an electronic component, the motor is arranged in the shell, and a fan is arranged at one end of a rotor shaft of the motor; the electronic component is arranged in the shell, electrically connected with the motor and located on the side, away from the fan, of the motor in the axial direction. The electronic components comprise a first electronic component, a second electronic component and a third electronic component, the first electronic component, the second electronic component and the third electronic component are arranged around the rotor shaft, and the included angle between the connecting lines of the center of the first electronic component and the center of the rotor shaft and the connecting lines of the center of the second electronic component and the center of the rotor shaft is 120-150 degrees. The included angle between the connecting lines of the centers of the first electronic component and the third electronic component and the center of the rotor shaft is 120-150 degrees. The layout of electronic components in the electric tool is more compact, more air duct area is released, and the heat dissipation effect of the whole machine is improved.

Description

TECHNICAL FIELD

[0001] The utility model embodiment relates to electric tool technical field, especially a kind of electric tool. BACKGROUND

[0002] Electric tool such as edge trimmer is used more in woodworking furniture industry due to its small size and high efficiency, but because of cutting off material and other working conditions, the power of whole machine is high, and the temperature rise of whole machine is higher. Because the electric control of whole machine is compact, electronic components are often stacked above the shell in AC speed-regulating electric tool, which easily causes air duct blockage and affects the life of whole machine under high temperature. For example, the existing AC speed-regulating edge trimmer is usually provided with more than four electronic components (including but not limited to switches, speed-regulating plates, capacitors, terminal posts and main controllers) uniformly distributed at 90°. Although it brings compact structure, the position is compact, and there is overlapping projection area with the motor (rotating stator) below, so such arrangement mode will block part of original air duct, resulting in reduction of gas flow at rotating stator. CONTENT OF UTILITY MODEL

[0003] The purpose of the utility model embodiment is to provide an electric tool, aiming at improving the problem that the arrangement mode of electronic components above the motor of existing electric tool will block part of air duct.

[0004] To solve the above technical problem, the utility model embodiment provides an electric tool, which comprises:

[0005] a shell;

[0006] a motor, which is arranged in the shell, and one end of a rotor shaft of the motor is provided with a fan;

[0007] electronic components, which are arranged in the shell, and the electronic components are electrically connected to the motor, and the electronic components are located on the side of the motor axially away from the fan;

[0008] The electronic components comprise first electronic components, second electronic components and third electronic components, the first electronic components, the second electronic components and the third electronic components are arranged around the rotor shaft, the included angle between the line connecting the center of the first electronic components and the center of the rotor shaft and the line connecting the center of the second electronic components and the center of the rotor shaft is 120°-150°, and the included angle between the line connecting the center of the first electronic components and the center of the rotor shaft and the line connecting the center of the third electronic components and the center of the rotor shaft is 120°-150°.

[0009] Preferably, the included angle between the line connecting the center of any two of the first electronic components, the second electronic components and the third electronic components and the center of the rotor shaft is 120°.

[0010] Preferably, the electronic components further comprise a fourth electronic component, the fourth electronic component being located on the side of the second electronic component close to the motor in the axial direction, at least part of the fourth electronic component being opposite to the second electronic component in the axial direction.

[0011] Preferably, the electronic components further comprise a fifth electronic component, the fifth electronic component being located on the side of the second electronic component close to the motor in the axial direction, wherein:

[0012] the fourth electronic component and the fifth electronic component are opposite to the end of the second electronic component away from the rotor shaft in the axial direction; and / or,

[0013] the fourth electronic component and the fifth electronic component are arranged along a direction perpendicular to the axial direction.

[0014] Preferably, the fourth electronic component is a capacitor, and the fifth electronic component is a terminal platform.

[0015] Preferably, the first electronic component is a controller, the second electronic component is a speed regulating disc, and the third electronic component is a switch.

[0016] Preferably, the angle between the line connecting the center of the speed regulating disc and the center of the controller and the center of the rotor shaft is 120°-130°.

[0017] Preferably, the angle between the line connecting the center of the switch and the center of the controller and the center of the rotor shaft is 140°-150°.

[0018] Preferably, the angle between the arrangement direction of the controller and the arrangement direction of the switch is 25°-35°.

[0019] Preferably, the angle between the arrangement direction of the controller and the arrangement direction of the speed regulating disc is 55°-65°.

[0020] Compared with the prior art, the electric tool has the following beneficial effects:

[0021] The electronic components located above the motor in the electric tool of the utility model comprise a first electronic component, a second electronic component and a third electronic component, the angle between the first electronic component and the second electronic component and the angle between the first electronic component and the third electronic component are both 120°-150°, so that the electronic component layout in the whole machine is more compact, more air duct area is released, and the heat dissipation effect of the whole machine is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0023] Figure 1 This is a schematic structural diagram of an electric tool in an embodiment of the present utility model;

[0024] Figure 2 for Figure 1 A cross-sectional view of a power tool;

[0025] Figure 3 for Figure 1 Schematic diagram of the structure of the power tool after removing the top casing;

[0026] Figure 4 for Figure 3 An exploded view of the power tool with the top casing removed;

[0027] Figure 5 for Figure 3 A row of electronic components in the layout;

[0028] Figure 6 for Figure 3 Another layout of electronic components.

[0029] Description of the accompanying drawings of this utility model:

[0030] Power tool 100, housing 1, housing body 11, top housing 12, air inlet 13, wire guide 14, motor 2, rotor shaft 21, fan 22, stator 23, rotor 24, commutator 25, first electronic component 3, controller 3a, second electronic component 4, speed dial 4a, third electronic component 5, switch 5a, fourth electronic component 6, capacitor 6a, fifth electronic component 7, terminal block 7a, sixth electronic component 8, inductor 8a, wire 9.

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the utility model have the direction indication (such as up, down, left, right, front, back, etc.), the direction indication is only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), if the specific posture changes, the direction indication also changes accordingly.

[0034] In addition, if the embodiments of the utility model have the description of "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0035] The utility model provides a kind of electric tool, which can be edge trimmer, cutting machine or polishing machine and the like AC speed regulation electric tool, below will take electric tool as edge trimmer as an example to introduce, Figure 1 to Figure 6 A preferred embodiment of the electric tool provided by the utility model is shown.

[0036] Please refer to Figure 1 to Figure 3 In the embodiment, the electric tool 100 includes a housing 1, a motor 2, and electronic components.

[0037] Please refer to Figure 1 And Figure 2 The motor 2 is arranged in the housing 1, and one end of a rotor shaft 21 of the motor 2 is provided with a fan 22.

[0038] Specifically, the electric tool 100 is an AC speed regulation edge trimmer, and the motor 2 is an AC motor. The motor 2 includes a stator 23, a rotor 24, and a rotor shaft 21. The rotor shaft 21 is rotatably arranged in the housing 1. The rotor 24 is sleeved on the rotor shaft 21. The stator 23 is sleeved between the rotor 24 and the housing 1. The two ends of the rotor shaft 21 are respectively provided with a fan 22 and a commutator 25. The fan 22 and the commutator 25 are respectively located on the two sides of the rotor 24 in the axial direction. The fan 22 can be driven to rotate by the rotor shaft 21.

[0039] The shell 1 is formed with an air duct, and the motor 2 is located in the air duct of the shell 1. When the rotor shaft 21 drives the fan 22 to rotate, the fan 22 can drive the gas in the air duct to flow, and the flowing gas in the air duct can take away the heat of the motor 2 to achieve heat dissipation of the motor 2. The axial direction of the rotor shaft 21 is defined as the up-down direction, and the end of the rotor shaft 21 provided with the fan 22 is the lower end of the rotor shaft 21, and the end of the rotor shaft 21 provided with the commutator 25 is the upper end of the rotor shaft 21.

[0040] Please refer to Figure 2 to Figure 6 The electronic components are arranged in the shell 1, and the electronic components are electrically connected to the motor 2. The electronic components are located on the side of the motor 2 away from the fan 22 in the axial direction. The electronic components include a first electronic component 3, a second electronic component 4, and a third electronic component 5. The first electronic component 3, the second electronic component 4, and the third electronic component 5 are arranged around the rotor shaft 21. The angle between the center line of the first electronic component 3 and the center of the rotor shaft 21 is 120°-150°, and the angle between the center line of the third electronic component 5 and the center of the rotor shaft 21 is 120°-150°.

[0041] Specifically, the electronic components are located on the upper side of the motor 2, and the electronic components are arranged in multiple. The multiple electronic components are electrically connected to the motor 2 to control the operation of the motor 2 through the multiple electronic components. The multiple electronic components include the first electronic component 3, the second electronic component 4, and the third electronic component 5. At least part of any one of the first electronic component 3, the second electronic component 4, and the third electronic component 5 is opposite to the stator 23 in the up-down direction, and the first electronic component 3, the second electronic component 4, and the third electronic component 5 are arranged around the periphery of the rotor shaft 21 along the circumferential direction of the motor 2.

[0042] Please refer to Figure 5, the electric tool 100 is projected to a horizontal plane, a line A passes through the center of the first electronic component 3 and the center of the rotor shaft 21, a line B passes through the center of the second electronic component 4 and the center of the rotor shaft 21, and a line C passes through the center of the third electronic component 5 and the center of the rotor shaft 21. The angle between the line A and the line B is 120°-150°, and the angle between the line A and the line C is 120°-150°. In this way, the electronic components above the motor 2 are irregularly distributed, which can make the layout of the electronic components in the whole machine more compact, release more air duct area, and improve the heat dissipation effect of the whole machine. Preferably, the angle between the line of the center of any two of the first electronic component 3, the second electronic component 4, and the third electronic component 5 and the center of the rotor shaft 21 is 120°, that is, the angle between the line A and the line B is 120°, the angle between the line A and the line C is 120°, and the angle between the line B and the line C is 120°. The first electronic component 3, the second electronic component 4, and the third electronic component 5 are arranged at intervals of 120° with the center axis of the rotor shaft 21 as the center. In this way, more air duct area can be released, and the effective cooling of the motor 2 can be better achieved.

[0043] The electronic components above the motor 2 generally include a controller 3a, a speed regulating disc 4a, a switch 5a, a capacitor 6a, a terminal table 7a, etc. The first electronic component 3, the second electronic component 4, and the third electronic component 5 can be any three of the controller 3a, the speed regulating disc 4a, the switch 5a, the capacitor 6a, and the terminal table 7a. Alternatively, please refer to Figure 3 to Figure 6 In the embodiment, the first electronic component 3 is the controller 3a, the second electronic component 4 is the speed regulating disc 4a, and the third electronic component 5 is the switch 5a.

[0044] Specifically, the controller 3a can control the operation of the motor 2, the user can adjust the speed of the motor 2 through the speed regulating disc 4a, and the controller 3a can control the motor 2 to operate at the speed adjusted by the speed regulating disc 4a. The user can switch on and off the electric tool 100 through the switch 5a. In the following, the first electronic component 3 is taken as the controller 3a, the second electronic component 4 is taken as the speed regulating disc 4a, and the third electronic component 5 is taken as the switch 5a as an example for introduction. The angle between the line of the center of the controller 3a and the center of the rotor shaft 21 and the line of the center of the speed regulating disc 4a and the center of the rotor shaft 21 is 120°-150°, preferably, the angle between the line of the center of the controller 3a and the center of the rotor shaft 21 and the line of the center of the speed regulating disc 4a and the center of the rotor shaft 21 is 120°-130°. The angle between the line of the center of the controller 3a and the center of the rotor shaft 21 and the line of the center of the switch 5a and the center of the rotor shaft 21 is 120°-150°, preferably, the angle between the line of the center of the controller 3a and the center of the rotor shaft 21 and the line of the center of the switch 5a and the center of the rotor shaft 21 is 140°-150°.

[0045] The electronic components above the motor 2 in the electric tool 100 include the first electronic component 3, the second electronic component 4 and the third electronic component 5, the included angle between the first electronic component 3 and the second electronic component 4 and the included angle between the first electronic component 3 and the third electronic component 5 are 120°-150°, so that the electronic component layout in the whole machine is more compact, more air duct area is released, and the heat dissipation effect of the whole machine is improved.

[0046] Optionally, referring to Figure 1 , Figure 2 and Figure 5 , in the embodiment, the shell 1 includes a shell main body 11 and a top shell 12, the motor 2 is arranged in the shell main body 11, the top shell 12 is arranged on the upper end of the shell main body 11, the upper shell wall of the shell main body 11 is provided with an air inlet 13, so as to communicate the shell main body 11 and the top shell 12 through the air inlet 13, and the electronic components are arranged in the top shell 12.

[0047] Specifically, the air inlet 13 is opposite to the motor 2 in the up-down direction, the air inlet 13 is arranged in the circumferential direction along the motor 2, the air inlet 13 is located in the middle of the top shell 12, and the first electronic component 3, the second electronic component 4 and the third electronic component 5 are all arranged close to the edge of the top shell 12. The commutator 25 of the motor 2 is usually arranged close to the air inlet 13, when the electric tool 100 works, it is often overload operation, so the commutator 25 should be cooled to ensure the overload life of the motor 2. The electronic components above the motor 2 in the electric tool 100 are distributed in an irregular state, which reduces the blockage of the electronic components to the air inlet 13, increases the passage area of the air inlet 13, releases the air duct area of the rear end, and can effectively cool the commutator of the alternating current series motor.

[0048] Optionally, referring to Figure 3 to Figure 6 , in the embodiment, the electronic components further include a fourth electronic component 6, the fourth electronic component 6 is located on the side of the second electronic component 4 close to the motor 2 in the axial direction, and at least part of the fourth electronic component 6 is opposite to the second electronic component 4 in the axial direction.

[0049] Specifically, the fourth electronic component 6 is located on the lower side of the second electronic component 4, and the projection of the fourth electronic component 6 on the horizontal plane or the whole projection overlaps the projection of the second electronic component 4 on the horizontal plane, so that the blockage of the fourth electronic component 6 to the air inlet 13 is reduced, more air duct area is released, and the heat dissipation effect of the whole machine is further improved.

[0050] The fourth electronic component 6 can be a capacitor 6a, a terminal table 7a or an inductor 8a, etc. The capacitor 6a and the inductor 8a can make the power supply of the motor 2 more smooth, and the terminal table 7a can be used as a joint when the motor 2 is powered. One end of the top housing 12 is provided with a wire guide 14, and the wire guide 14 is provided with a wire 9. One end of the wire 9 is connected to an external power source, and the other end of the wire 9 extends into the top housing 12 from the wire guide 14 and is connected to the motor 2 through the terminal table 7a. In the following, the end of the top housing 12 provided with the wire guide 14 is defined as one end of the top housing 12 in the transverse direction, and the fourth electronic component 6 is taken as the capacitor 6a for example.

[0051] The capacitor 6a is located on the lower side of the speed regulating disc 4a. Optionally, please refer to Figure 3 to Figure 6 In this embodiment, the fourth electronic component 6 is axially opposite to the second electronic component 4 away from the rotor shaft 21, i.e. the capacitor 6a is located on the lower side of the end of the speed regulating disc 4a away from the rotor shaft 21, which is beneficial to reduce the blocking of the capacitor 6a to the air inlet 13.

[0052] Optionally, please refer to Figure 1 to Figure 6 In this embodiment, the electronic components further include a fifth electronic component 7, which is located on the side of the second electronic component 4 axially close to the motor 2, and at least part of the fifth electronic component 7 is axially opposite to the second electronic component 4.

[0053] Specifically, the fifth electronic component 7 is located on the lower side of the second electronic component 4, and the partial projection or the whole projection of the fifth electronic component 7 on the horizontal plane overlaps the projection of the second electronic component 4 on the horizontal plane, which can reduce the blocking of the fifth electronic component 7 to the air inlet 13, release more air duct area, and further improve the heat dissipation effect of the whole machine.

[0054] The fifth electronic component 7 can be a capacitor 6a, a terminal table 7a or an inductor 8a, etc. In the following, the fifth electronic component 7 is taken as the terminal table 7a for example. The terminal table 7a is located on the lower side of the speed regulating disc 4a. Optionally, please refer to Figure 1 to Figure 6 In this embodiment, the fifth electronic component 7 is axially opposite to the second electronic component 4 away from the rotor shaft 21, i.e. the terminal table 7a is located on the lower side of the end of the speed regulating disc 4a away from the rotor shaft 21, which is beneficial to reduce the blocking of the terminal table 7a to the air inlet 13.

[0055] The fourth electronic component 6 and the fifth electronic component 7 can be arranged staggered up and down, or can be arranged flush up and down. Optionally, please refer to Figure 3In the embodiment, the fourth electronic component 6 and the fifth electronic component 7 are arranged in a direction perpendicular to the axial direction, i.e. in a horizontal direction. For example, the fourth electronic component 6 and the fifth electronic component 7 can be arranged in a transverse direction or a longitudinal direction.

[0056] Optionally, referring to Figure 4 to Figure 6 In the embodiment, the electronic component further comprises a sixth electronic component 8, which is located on the side of the second electronic component 4 close to the rotor shaft 21. The sixth electronic component 8 can be a capacitor 6a, a terminal platform 7a or an inductor 8a, and the following will be introduced by taking the inductor 8a as an example.

[0057] Optionally, referring to Figure 5 and Figure 6 In the embodiment, the switch 5a is arranged at the end of the top shell 12 away from the wire guide 14 in the transverse direction, and the switch 5a is arranged in the longitudinal direction, while the speed regulating disc 4a is arranged in the transverse direction.

[0058] Optionally, referring to Figure 5 and Figure 6 In the embodiment, the angle between the arrangement direction of the speed regulating disc 4a and the arrangement direction of the switch 5a is 90°. The speed regulating disc 4a and the switch 5a are distributed at 90° or approximately 90°.

[0059] Optionally, referring to Figure 1 to Figure 6 In the embodiment, the angle between the arrangement direction of the controller 3a and the arrangement direction of the switch 5a is 25°-35°.

[0060] Specifically, the projection of the controller 3a in the horizontal direction is a rectangle, the arrangement direction of the controller 3a is the long side direction of the rectangle, the controller 3a and the switch 5a are in a state of 30°±5°, and preferably, the controller 3a and the switch 5a are in a state of 30°.

[0061] Optionally, referring to Figure 5 and Figure 6 In the embodiment, the angle between the arrangement direction of the controller 3a and the arrangement direction of the speed regulating disc 4a is 55°-65°.

[0062] Specifically, the controller 3a and the speed regulating disc 4a are in a state of 60°±5°, and preferably, the controller 3a and the speed regulating disc 4a are in a state of 60°.

[0063] Optionally, referring to Figure 3 , Figure 4 and Figure 6With the center of the rotor shaft 21 as the origin, the transverse direction as the X axis, and the longitudinal direction as the Y axis, a virtual coordinate system is established, forming a first interval A1, a second interval A2, a third interval A3, and a fourth interval A4. The controller 3a is distributed in the first interval A1 and the fourth interval A4, the speed regulating disc 4a is distributed in the third interval A3 and the fourth interval A4, the switch 5a is distributed in the second interval A2 and the third interval A3, the capacitor 6a is distributed in the fourth interval A4, the terminal table 7a is distributed in the third interval A3 and the fourth interval A4, and the inductor 8a is distributed in the first interval A1 and the second interval A2. In this way, the electronic components are arranged above the motor 2, and the actual passage area of the air inlet 13 is increased by 20% to 30% compared with the original state.

[0064] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation, direct / indirect application in other related technical fields under the utility model concept of the utility model, and the contents of the utility model specification and drawings are included in the patent protection range of the utility model.

Claims

1. An electric tool, characterized in that: include: case; a motor, the motor being disposed in the housing, and a fan being disposed at one end of a rotor shaft of the motor; electronic components, the electronic components being disposed in the housing, the electronic components being electrically connected to the motor, and the electronic components being located on a side of the motor that is axially away from the fan; The electronic components include a first electronic component, a second electronic component, and a third electronic component. The first electronic component, the second electronic component, and the third electronic component are arranged around the rotor shaft. The angle between the center of the first electronic component, the second electronic component, and the center of the rotor shaft is 120° to 150°, and the angle between the center of the first electronic component, the third electronic component, and the center of the rotor shaft is 120° to 150°.

2. The electric tool according to claim 1, wherein: An angle between a line connecting the centers of any two of the first electronic component, the second electronic component, and the third electronic component and the center of the rotor shaft is 120°.

3. The electric tool according to claim 1, wherein: The electronic components further include a fourth electronic component, which is located on a side of the second electronic component close to the motor in the axial direction, and at least a portion of the fourth electronic component is opposite to the second electronic component in the axial direction.

4. The electric tool according to claim 3, wherein: The electronic components further include a fifth electronic component, which is located on a side of the second electronic component close to the motor in the axial direction, wherein: The fourth electronic component and the fifth electronic component are both opposite to the end of the second electronic component away from the rotor shaft in the axial direction; and / or, The fourth electronic component and the fifth electronic component are arranged along a direction perpendicular to the axial direction.

5. The electric tool according to claim 4, wherein: The fourth electronic component is a capacitor, and the fifth electronic component is a terminal block.

6. The electric tool according to any one of claims 1 to 5, characterized in that: The first electronic component is a controller, the second electronic component is a speed regulating disk, and the third electronic component is a switch.

7. The electric tool according to claim 6, wherein: The angle between the connecting lines of the speed regulating disc, the center of the controller and the center of the rotor shaft is 120° to 130°.

8. The electric tool according to claim 6, wherein: The angle between the line connecting the centers of the switch and the controller and the center of the rotor shaft is 140° to 150°.

9. The electric tool according to claim 6, wherein: The angle between the arrangement direction of the controller and the arrangement direction of the switches is 25° to 35°.

10. The electric tool according to claim 6, wherein: The angle between the arrangement direction of the controller and the arrangement direction of the speed regulating disk is 55° to 65°.

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