Electric tool

Abstract

The utility model relates to an electric tool. The electric tool comprises a driving motor; the machine shell at least partially covers the driving motor; the handle part is connected with the machine shell; the battery is used for supplying power to the driving motor; the tool head is driven by the driving motor; the driving motor comprises a motor shell, at least part of the motor shell is made of metal, and the motor shell is provided with a first connecting part; the controller comprises a controller shell and an electronic device partially accommodated in the controller shell, and the controller shell is made of metal and is provided with a second connecting part; and the second connecting part is connected with the first connecting part of the motor shell. Heat generated by the controller can be quickly dissipated through the first motor shell, the controller is prevented from being damaged by high temperature, and the service life of the controller is effectively prolonged.

Description

Technical Field

[0001] This application relates to the field of power tool technology, and in particular to power tools with controllers. Background Technology

[0002] With the development of science and technology, the electrification and cordless operation of tools have become a trend. Power tools use electric motors as power sources, which drive the working head through a transmission mechanism, enabling them to quickly complete tasks such as drilling, cutting, grinding, and assembly, greatly improving work efficiency and reducing labor intensity.

[0003] With the continuous development of power tools, power tools with controllers are now ubiquitous. However, when using power tools, the controller often generates a lot of heat, and the temperature can rise rapidly, which may pose some potential dangers.

[0004] Therefore, it is necessary to provide an electric tool to solve the problem of controller heat dissipation. Utility Model Content

[0005] Therefore, it is necessary to provide a power tool to address the controller heat dissipation problem.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows:

[0007] In one embodiment, a power tool is provided, the power tool comprising:

[0008] Drive motor;

[0009] The machine casing at least partially covers the drive motor;

[0010] The handle is connected to the machine housing;

[0011] The battery supplies power to the drive motor;

[0012] The tool head is driven by the drive motor;

[0013] The drive motor includes a motor housing, which is at least partially made of metal, and the motor housing has a first connecting portion;

[0014] The controller includes a controller housing and some electronic components housed within the controller housing. The controller housing is made of metal and has a second connection portion; the second connection portion is connected to a first connection portion of the motor housing.

[0015] In some preferred embodiments, the drive motor is a disc motor, which includes a motor stator, a first motor rotor and a second motor rotor located on both sides of the motor stator, and an output shaft connected to the first motor rotor and the second motor rotor; the output shaft is supported on the motor housing by two bearings and partially protrudes from the motor housing.

[0016] In some preferred embodiments, the motor housing includes a first motor housing and a second motor housing; the first motor housing and the second motor housing are connected and fixed by screws.

[0017] In some preferred embodiments, the first motor housing is made of metal; the second motor housing is also made of metal.

[0018] In some preferred embodiments, the first connecting portion is disposed on the outer surface of the first motor housing and is planar.

[0019] In some preferred embodiments, the outer surface of the first motor housing has a support rib connected to the first connecting portion, and the support rib is flush with the outer surface of the first connecting portion; the first connecting portion and the support rib together support the controller housing.

[0020] In some preferred embodiments, the outer surface of the first motor housing has a limiting rod connected to the support rib, the limiting rod being higher than the support rib, and the first motor housing is also provided with a positioning post; the limiting rod and the positioning post cooperate to limit the controller; the controller housing has a pressing part, the positioning post is fitted with a bolt, and the bolt presses the pressing part.

[0021] In some preferred embodiments, the outer surface of the first motor housing is further provided with a support rod and a fixing stud disposed on the support rod.

[0022] In some preferred embodiments, the inner surface of the motor housing is further provided with a bearing chamber, which houses the bearing that supports the output shaft.

[0023] In some preferred embodiments, the power tool further includes a transmission assembly connected to the drive motor; the tool head is connected to the transmission assembly.

[0024] In this embodiment, since the first motor housing is made of metal and the controller housing is also made of metal, and the second connecting part is connected to the first connecting part of the motor housing, the heat generated by the controller can be quickly dissipated through the first motor housing, preventing high temperature damage to the controller and effectively improving the service life of the controller. Attached Figure Description

[0025] Figure 1This is a schematic diagram of the structure of a power tool according to one embodiment of this application;

[0026] Figure 2 This is an exploded schematic diagram of some components of a power tool in one embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the structure of the first motor housing of a power tool in one embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the structure of a power tool controller in one embodiment of this application;

[0029] Figure 5 This is a cross-sectional schematic diagram of a power tool according to an embodiment of this application. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] See Figures 1 to 2 This application provides an embodiment of a power tool, which may be an electric hedge trimmer 100, an electric brush cutter, an electric wrench, an electric drill, etc. The electric hedge trimmer 100 includes a drive motor 1, a machine housing 2 that at least partially covers the drive motor 1, a handle 3 connected to the machine housing 2, a battery (not shown) that supplies power to the drive motor 1, a transmission assembly 4 connected to the drive motor 1, and a tool head connected to the transmission assembly 4.

[0037] See Figures 3 to 5In this embodiment, the drive motor 1 is a disc motor, comprising a motor stator 11, a first motor rotor 12 and a second motor rotor 13 located on both sides of the motor stator 11, an output shaft 14 connected to the first motor rotor 12 and the second motor rotor 13, and a motor housing 15. The output shaft 14 is supported on the motor housing 15 by two bearings and partially protrudes from the motor housing 15. The motor housing 15 covers the motor stator 11, the first motor rotor 12, and the second motor rotor 13. The motor housing 15 includes a first motor housing 151 and a second motor housing. The first motor housing 151 and the second motor housing are connected and fixed by screws; in other embodiments, they can also be connected and fixed by other fixing methods. The first motor housing 151 is made of metal for easy heat dissipation. In a preferred embodiment, the second motor housing is also made of metal. See details below. Figure 3 The outer surface of the first motor housing 151 has a planar first connecting portion 1511, a support rib 1512 connected to the first connecting portion, and a limiting rod 1513 connected to the support rib 1512. In a preferred embodiment, the support rib 1512 is flush with the outer surface of the first connecting portion 1511. The limiting rod 1513 extends beyond the support rib 1512. The first motor housing 151 also has a positioning post 1514. The first motor housing 151 also has a support rod 1515 and a fixing stud 1516 disposed on the support rod 1515. The fixing stud 1516 cooperates with bolts to fix the first motor housing 151 to the machine housing 2. The inner surface of the first motor housing 151 also has a bearing chamber for accommodating the bearing supporting the output shaft 14.

[0038] See Figures 2 to 5 The electric hedge trimmer 100 also includes a controller 5, which includes a controller housing 51 and some electronic components housed within the controller housing 51. The controller housing 51 is made of metal and has a second connecting portion. The second connecting portion is connected to the first connecting portion 1511 of the motor housing 15. The controller housing 51 also has a crimping portion 511. When the controller 5 is installed on the motor housing 15, the limiting rod 1513 and the positioning post 1514 cooperate to restrict the movement of the controller 5. Furthermore, the positioning post 1514 is fitted with a bolt, which tightens the crimping portion 511, completely fixing the controller 5 to the motor housing 15. At this time, the first connecting portion 1511 and the support rib 1512 jointly support the controller housing 51. Since the first motor housing 151 is made of metal, and the controller housing 51 is also made of metal, and the second connecting portion is connected to the first connecting portion 1511 of the motor housing 15, the heat generated by the controller can be quickly dissipated through the first motor housing 151, preventing high-temperature damage to the controller 5 and effectively extending the service life of the controller 5.

[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A power tool, characterized in that, The power tool includes: Drive motor; The machine casing at least partially covers the drive motor; The handle is connected to the machine housing; The battery supplies power to the drive motor; The tool head is driven by the drive motor; The drive motor includes a motor housing, which is at least partially made of metal, and the motor housing has a first connecting portion; The controller includes a controller housing and some electronic components housed within the controller housing. The controller housing is made of metal and has a second connection portion; the second connection portion is connected to a first connection portion of the motor housing.

2. The power tool according to claim 1, characterized in that, The drive motor is a disc motor, and the drive motor includes a motor stator, a first motor rotor and a second motor rotor located on both sides of the motor stator, and an output shaft connected to the first motor rotor and the second motor rotor; The output shaft is supported on the motor housing by two bearings and partially protrudes from the motor housing.

3. The power tool according to claim 1, characterized in that, The motor housing includes a first motor housing and a second motor housing; the first motor housing and the second motor housing are connected and fixed by screws.

4. The power tool according to claim 3, characterized in that, The first motor housing is made of metal; the second motor housing is also made of metal.

5. The power tool according to claim 3, characterized in that, The first connecting part is disposed on the outer surface of the first motor housing and is planar.

6. The power tool according to claim 5, characterized in that, The outer surface of the first motor housing has a support rib connected to the first connecting part, and the support rib is flush with the outer surface of the first connecting part; the first connecting part and the support rib together support the controller housing.

7. The power tool according to claim 6, characterized in that, The outer surface of the first motor housing has a limiting rod connected to the support rib, the limiting rod being higher than the support rib, and the first motor housing also has a positioning post; the limiting rod and the positioning post cooperate to limit the controller; the controller housing has a pressing part, the positioning post is fitted with a bolt, and the bolt presses the pressing part.

8. The power tool according to claim 3, characterized in that, The outer surface of the first motor housing is also provided with a support rod and a fixing stud on the support rod.

9. The power tool according to claim 2, characterized in that, The inner surface of the motor housing is also provided with a bearing chamber, which houses the bearing that supports the output shaft.

10. The power tool according to claim 1, characterized in that, The power tool also includes a transmission assembly connected to the drive motor; the tool head is connected to the transmission assembly.

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