阅读说明：本技术 电动工具 (Electric tool ) 是由 刘强 于 2021-04-16 设计创作，主要内容包括：本申请提供一种电动工具,包括工具主体及为工具主体供电的电池包,工具主体包括电池包安装机构,电池包安装机构包括对接空间及电连接组件,电池包包括用于与工具主体电性连接的连接区段及储存电能的储能区段,电池包配置为能够以第一姿态和第二姿态组装于电池包安装机构,使得：连接区段收纳于对接空间内且与电连接组件电性连接,储能区段位于电池包安装机构外；当电池包以第一姿态组装于电池包安装机构时,储能区段在第一方向上突出于工具主体的尺寸为第一尺寸；当电池包以第二姿态组装于电池包安装机构时,储能区段在第一方向上突出于工具主体的尺寸为第二尺寸；第一尺寸小于第二尺寸,第一方向垂直于电池包的组装方向。(The application provides an electric tool, include the instrument main part and for the battery package of instrument main part power supply, the instrument main part includes battery package installation mechanism, battery package installation mechanism is including butt joint space and electric connection component, the battery package including be used for with instrument main part electric connection's connection section and the energy storage section of storing electric energy, the battery package configuration is assembled in battery package installation mechanism with first gesture and second gesture for: the connecting section is accommodated in the butt joint space and is electrically connected with the electric connecting assembly, and the energy storage section is positioned outside the battery pack mounting mechanism; when the battery pack is assembled on the battery pack mounting mechanism in a first posture, the size of the energy storage section protruding out of the tool body in the first direction is a first size; when the battery pack is assembled on the battery pack mounting mechanism in the second posture, the size of the energy storage section protruding out of the tool body in the first direction is the second size; the first dimension is smaller than the second dimension, and the first direction is perpendicular to the assembly direction of the battery pack.)

1. An electric tool comprises a tool main body and a battery pack for supplying power to the tool main body, wherein the tool main body comprises a battery pack mounting mechanism, the battery pack mounting mechanism comprises a butt joint space and an electric connection component, and the electric tool is characterized in that,

the battery pack includes a connection section for electrical connection with the tool body and an energy storage section for storing electrical energy, the battery pack being configured to be assembled to the battery pack mounting mechanism in a first attitude and a second attitude such that: the connecting section is accommodated in the butt joint space and is electrically connected with the electric connecting assembly, and the energy storage section is positioned outside the battery pack mounting mechanism;

when the battery pack is assembled on the battery pack mounting mechanism in a first posture, the size of the energy storage section protruding out of the tool main body in the first direction is a first size; when the battery pack is assembled on the battery pack mounting mechanism in a second posture, the size of the energy storage section protruding out of the tool body in the first direction is a second size;

the first dimension is smaller than the second dimension, and the first direction is perpendicular to an assembly direction of the battery pack.

2. The power tool of claim 1, wherein the battery pack rotates 180 ° during the transition from the first posture to the second posture.

3. The power tool of claim 2, wherein the tool body includes a motor, the electrical connection assembly includes a first terminal set that interfaces with the battery pack and a polarity switching circuit connected between the first terminal set and the motor, the first terminal set includes a first terminal and a second terminal that are exposed in the interface space;

when the battery pack is assembled to the battery pack mounting mechanism in a first posture, the polarity switching circuit is in a first state; when the battery pack is assembled to the battery pack mounting mechanism in a second posture, the polarity switching circuit is in a second state;

in a first state, the first terminal is electrically connected with a first electrode of the motor, and the second terminal is electrically connected with a second electrode of the motor; in the second state, the first terminal is electrically connected with the second electrode of the motor, and the second terminal is electrically connected with the first electrode of the motor.

4. The power tool of claim 2, wherein the electrical connection assembly includes first and second terminal sets that interface with the battery pack, the first and second terminal sets being centrally symmetric about a geometric center of the interface space;

when the battery pack is assembled to the battery pack mounting mechanism in a first posture, the battery pack is butted with the first terminal group; when the battery pack is assembled to the battery pack mounting mechanism in the second posture, the battery pack is butted with the second terminal group.

5. The power tool of claim 4, wherein the first terminal set includes a first terminal and a second terminal exposed in the mating space, the second terminal set includes a third terminal and a fourth terminal exposed in the mating space, the first terminal is electrically connected to the third terminal, and the second terminal is electrically connected to the fourth terminal.

6. The power tool according to any one of claims 1 to 5, wherein a length direction of the energy storing section is perpendicular to a length direction of the connecting section.

7. The power tool according to claim 6, wherein the tool main body includes a motor provided in a third direction and an output shaft provided in a fourth direction;

when the battery pack is assembled on the battery pack mounting mechanism in the first posture, the battery pack protrudes out of the tool main body in the fourth direction to be a third size; when the battery pack is assembled on the battery pack mounting mechanism in the second posture, the battery pack protrudes out of the tool main body in the fourth direction by a fourth size; the third size is smaller than the fourth size.

8. The electric power tool according to claim 7, wherein a dimension of the battery pack protruding the tool main body in the fifth direction when the battery pack is assembled to the battery pack mounting mechanism in the first posture is a fifth dimension; when the battery pack is assembled to the battery pack mounting mechanism in the second posture, the battery pack has a size of protruding the tool main body in the fifth direction as a sixth size;

the fifth dimension is greater than the sixth dimension, and the fifth direction is opposite to the fourth direction.

9. The power tool of claim 8, wherein the third dimension and the sixth dimension are both 0.

10. The power tool of claim 1, wherein the battery pack mounting mechanism includes a support surface through which the docking space extends, the support surface supporting the energy storage section.

Technical Field

The present application relates to a power tool.

Background

Compared with a manual tool, the electric tool has the advantages of high efficiency, high precision and the like. The lithium battery electric tool adopts the lithium battery as a power supply, is not restrained by a cable any more and has wider application scenes. Fig. 1 shows an angle grinder which is powered by a battery pack a, and the upper end surface S of the battery pack B protruding from a tool body a, in the scene shown in fig. 1, the space above the angle grinder is limited, and it is difficult to perform grinding work in this scene.

Disclosure of Invention

The present application provides an electric tool that can be used in a narrow space.

Specifically, the application provides an electric tool, include the tool main part and for the battery package of tool main part power supply, the tool main part includes battery package installation mechanism, battery package installation mechanism is including butt joint space and electrical connection component, the battery package is including being used for with tool main part electric connection's connection segment and the energy storage segment of storing the electric energy, the battery package configuration be can with first gesture and second gesture assemble in battery package installation mechanism makes: the connecting section is accommodated in the butt joint space and is electrically connected with the electric connecting assembly, and the energy storage section is positioned outside the battery pack mounting mechanism; when the battery pack is assembled on the battery pack mounting mechanism in a first posture, the size of the energy storage section protruding out of the tool main body in the first direction is a first size; when the battery pack is assembled on the battery pack mounting mechanism in a second posture, the size of the energy storage section protruding out of the tool body in the first direction is a second size; the first dimension is smaller than the second dimension, and the first direction is perpendicular to an assembly direction of the battery pack.

Further, the battery pack rotates 180 degrees in the process of switching from the first posture to the second posture.

Further, the tool body comprises a motor, the electric connection assembly comprises a first terminal set butted with the battery pack and a polarity switching circuit connected between the first terminal set and the motor, and the first terminal set comprises a first terminal and a second terminal exposed in the butting space; the polarity switching circuit has a first state and a second state, wherein in the first state, the first terminal is electrically connected with a first electrode of the motor, and the second terminal is electrically connected with a second electrode of the motor; in a second state, the first terminal is electrically connected with a second electrode of the motor, and the second terminal is electrically connected with the first electrode of the motor; when the battery pack is assembled to the battery pack mounting mechanism in a first posture, the polarity switching circuit is in a first state; when the battery pack is assembled to the battery pack mounting mechanism in the second posture, the polarity switching circuit is in the second state.

Further, the electrical connection assembly comprises a first terminal set and a second terminal set which are butted with the battery pack, and the first terminal set and the second terminal set are centrosymmetric relative to the geometric center of the butting space; when the battery pack is assembled to the battery pack mounting mechanism in a first posture, the battery pack is butted with the first terminal group; when the battery pack is assembled to the battery pack mounting mechanism in the second posture, the battery pack is butted with the second terminal group.

Further, the first terminal group includes a first terminal and a second terminal exposed in the docking space, the second terminal group includes a third terminal and a fourth terminal exposed in the docking space, the first terminal is electrically connected to the third terminal, and the second terminal is electrically connected to the fourth terminal.

Further, the length direction of the energy storage section is perpendicular to the length direction of the connection section.

Further, the tool body comprises a motor arranged along a third direction and an output shaft arranged along a fourth direction; when the battery pack is assembled on the battery pack mounting mechanism in the first posture, the battery pack protrudes out of the tool main body in the fourth direction to be a third size; when the battery pack is assembled on the battery pack mounting mechanism in the second posture, the battery pack protrudes out of the tool main body in the fourth direction by a fourth size; the third size is smaller than the fourth size.

Further, when the battery pack is assembled to the battery pack mounting mechanism in the first posture, the battery pack has a dimension of protruding the tool main body in a fifth direction as a fifth dimension; when the battery pack is assembled to the battery pack mounting mechanism in the second posture, the battery pack has a size of protruding the tool main body in the fifth direction as a sixth size; the fifth dimension is greater than the sixth dimension, and the fifth direction is opposite to the fourth direction.

Further, the third size and the sixth size are both 0.

Further, the battery pack mounting mechanism includes a support surface through which the docking space extends, the support surface supporting the energy storage section.

In the application, the battery pack can be installed in different postures, so that the outer contour of the battery pack and even the outer contour of the electric tool can be properly adjusted, the battery pack is prevented from interfering with the surrounding environment in a narrow space to influence the operation of a user, and the electric tool can be suitable for the scene of the narrow space; in addition, the battery pack is assembled in different postures, so that the installation process of the battery pack is simplified, and the user experience is improved.

Drawings

Fig. 1 is a front view schematically showing a conventional electric power tool.

Fig. 2 is a perspective view of an embodiment of the power tool of the present application.

Fig. 3 is a perspective view of the battery pack mounting mechanism of the electric power tool shown in fig. 2, in which only a part of the battery pack mounting mechanism is illustrated.

Fig. 4 is a perspective view of a battery pack of the electric power tool shown in fig. 2.

Fig. 5 is a schematic front view of the power tool shown in fig. 2, wherein the battery pack is assembled in a first position.

Fig. 6 is a schematic front view of the power tool shown in fig. 2, wherein the battery pack is assembled in a second position.

Fig. 7 is a schematic diagram of a polarity switching circuit of the power tool shown in fig. 2.

Fig. 8 is a perspective view of another embodiment of the battery pack mounting mechanism of the power tool of the present application, wherein only a portion of the battery pack mounting mechanism is shown.

Fig. 9 is a schematic front view of an embodiment of the power tool of the present application, wherein the battery pack is assembled in a first position.

Fig. 10 is a schematic front view of the power tool shown in fig. 9, with the battery pack assembled in a second position.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used in this application, the terms "first," "second," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The application provides an electric tool, include the instrument main part and for the battery package of instrument main part power supply, the instrument main part includes battery package installation mechanism, battery package installation mechanism is including butt joint space and electrical connection component, the battery package including be used for with instrument main part electric connection's the connection section and store the energy storage section of electric energy, the battery package configuration be can with first gesture and second gesture assemble in battery package installation mechanism makes: the connecting section is accommodated in the butt joint space and is electrically connected with the electric connecting assembly, and the energy storage section is positioned outside the battery pack mounting mechanism; when the battery pack is assembled on the battery pack mounting mechanism in a first posture, the size of the energy storage section protruding out of the tool main body in the first direction is a first size; when the battery pack is assembled on the battery pack mounting mechanism in a second posture, the size of the energy storage section protruding out of the tool body in the first direction is a second size; the first dimension is smaller than the second dimension, and the first direction is perpendicular to an assembly direction of the battery pack.

Referring to fig. 2 to 4, the power tool of the present embodiment is, for example, an angle grinder, and includes a tool body 1 and a battery pack 2 for supplying power to the tool body. The tool body 1 includes a housing 11, a motor (not shown) accommodated in the housing 11, a transmission mechanism (not shown) and an output shaft 12 protruding from the housing 11, the transmission mechanism is used for transmitting power of the motor to the output shaft 12, and the output shaft 12 drives a working head 14 (such as a grinding wheel) to rotate so as to perform grinding operation. The motor is arranged in a third direction X and the output shaft 12 is arranged in a fourth direction Y +. The housing 11 includes a holding portion 110 surrounding the motor, a head case 111 housing the transmission mechanism, and a battery pack mounting portion 112 for assembling the battery pack 2, wherein the holding portion 110 is disposed along the third direction X and connects the head case 111 and the battery pack mounting portion 112. The battery pack mounting portion 112 and the electrical connection member together constitute a battery pack mounting mechanism for assembling the battery pack.

The electrical connection assembly includes a first terminal set 131 and a polarity switching circuit 132 connected between the first terminal set 131 and the motor, the first terminal set 131 includes a first terminal 1311 and a second terminal 1312, the first terminal 1311 and the second terminal 1312 are centrosymmetric with respect to a geometric center of the docking space 1120, and the positive terminal 211 and the negative terminal 212 of the battery pack are centrosymmetric with respect to a geometric center of the connection section. The polarity switching circuit 132 has a first state in which the first terminal 1311 is electrically connected to the first electrode of the motor and the second terminal 1312 is electrically connected to the second electrode of the motor; in the second state, the first terminal 1311 is electrically connected to the second electrode of the motor, and the second terminal 1312 is electrically connected to the first electrode of the motor, so that the battery pack can normally supply power to the motor regardless of the posture of the battery pack. Of course, if the power tool also includes other electrical components (e.g., LED lights), the battery pack also provides power to the power tool.

The battery pack 2 includes a connection section 21 and an energy storage section 22, and the energy storage section 22 needs to include a plurality of cells (e.g., 18650 cells) for storing electric energy, and thus is relatively large in size. The length direction of the energy storage section 22 is perpendicular to the length direction of the connection section 21, and the connection section 21 is eccentrically disposed with respect to the geometric center of the energy storage section 22. The battery pack mounting portion 112 includes a docking space 1120, and the docking space 1120 is configured to allow the battery pack 2 to be assembled in a first posture (shown in fig. 5) and a second posture (shown in fig. 6). Optionally, the battery pack 2 rotates 180 ° in the process of switching from the first posture to the second posture. In the present embodiment, the assembly direction of the battery pack is the same in both postures, i.e., the second direction O. The cross section of the connecting section 21 is roughly waist-shaped (or track-shaped), the battery pack 2 can be installed in a positive mode and a negative mode, a user can realize blind insertion without observing the positive mode and the negative mode, the installation process of the user is simplified, and the user experience is optimized.

When the battery pack 2 is assembled in the battery pack mounting mechanism, the connection section 21 is located in the docking space 1120 and electrically connected to the electrical connection assembly 131, and the energy storage section 22 is exposed outside the battery pack mounting mechanism. The battery pack mounting portion 112 further includes a supporting surface 1121, the docking space 1120 penetrates through the supporting surface 1121, and the supporting surface 1121 is used for supporting the energy storage section 22. Optionally, the connection section 21 may also include a small number of cells to enhance the cruising ability of the power tool.

Referring to fig. 5, when the battery pack 2 is assembled to the battery pack mounting mechanism in the first posture, the dimension of the energy storage section 22 protruding from the tool body 1 in the first direction P is a first dimension, and the first direction P is perpendicular to the second direction O; referring to fig. 6, when the battery pack 2 is assembled to the battery pack mounting mechanism in the second posture, the dimension of the energy storage section 22 protruding from the tool body 1 in the first direction P is the second dimension, and the first dimension is smaller than the second dimension. Preferably, the first dimension is 0 and the second dimension is greater than 0, that is, the battery pack 2 does not protrude in the first direction P when assembled in the first posture, thereby preventing the use of the electric power tool in a narrow space from being affected by an excessively large dimension in the first direction P.

Preferably, when the battery pack 2 is assembled to the battery pack mounting mechanism in the first posture, the dimension of the battery pack 2 protruding from the tool body 1 in the fourth direction Y + is a third dimension; when the battery pack 2 is assembled to the battery pack mounting mechanism in the second posture, the dimension of the battery pack 2 protruding from the tool main body 1 in the fourth direction Y + is a fourth dimension d 1; the third size is smaller than the fourth size. That is, the size of the power tool in the fourth direction Y + is smaller, and thus the power tool is more suitable for the scenarios shown in fig. 1 and 5 (the space in the fourth direction Y + is limited). Further, the third dimension is 0, and the fourth dimension is greater than 0, so as to further avoid the influence on the use of the electric tool in a narrow space due to the overlarge dimension in the fourth direction Y +, and thus the electric tool can be competent for the scenarios shown in fig. 1 and 5.

When the battery pack 2 is assembled to the battery pack mounting mechanism in the first posture, the battery pack protrudes from the tool main body 1 in the fifth direction Y-by a fifth dimension d 2; when the battery pack is assembled to the battery pack mounting mechanism in the second posture, the battery pack has a sixth size protruding from the tool body 1 in the fifth direction Y-; the fifth dimension d2 is greater than a sixth dimension; the fifth direction Y-is the reverse direction of the fourth direction Y +. That is, when the battery pack 2 is mounted in the second posture, the dimension of the protrusion in the fifth direction Y-is relatively small, which is advantageous for reducing the dimension in the fifth direction Y-and thus makes the electric power tool more suitable for the scene shown in fig. 6.

Turning to the polarity switching circuit 132 IN detail, as shown IN FIG. 7, IN1 corresponds to the first terminal 1311 and IN2 corresponds to the second terminal 1312. When the battery pack 2 is assembled IN the first posture, the positive terminal 201 of the battery pack 2 is connected to the IN1, the negative terminal 202 of the battery pack 2 is connected to the IN2, the photoelectric switch U1 (e.g., a photocoupler) operates and provides a low level signal to the MCU (microprocessor), and the MCU turns on the transistors T1 and T4 after recognizing the low level signal. Current flows back to the battery pack via IN1, transistor T1, the motor, transistors T4, and IN 2. When the battery pack 2 is assembled IN the second posture, the negative terminal 202 of the battery pack 2 is connected to the IN1, the positive terminal 201 of the battery pack 2 is connected to the IN2, the photoelectric switch U2 operates to provide a low level signal to the MCU, the MCU recognizes the low level signal, the transistors T2 and T3 are turned on, and the current flows back to the battery pack through the IN2, the transistor T2, the motor, the transistors T3 and the IN1, that is, the polarity switching circuit 132 can switch the positive and negative polarities of the first terminal 1311 and the second terminal 1312 according to the posture of the battery pack, so that the user can conveniently install the battery pack without observing the battery pack. Photoelectric switches U1, U2 need not to set up trigger switch alone through power signal, are favorable to saving components and parts, reduce cost.

Referring to fig. 8, in another embodiment, the electrical connection assembly includes a first terminal set 131 and a second terminal set 133 for mating with the battery pack 2, wherein the first terminal set 131 and the second terminal set 133 are symmetric with respect to the geometric center of the connection section 21; when the battery pack 2 is assembled to the battery pack mounting mechanism in the first posture, the battery pack 2 is butted against the first terminal group 131; when the battery pack 2 is assembled to the battery pack mounting mechanism in the second posture, the battery pack 2 is butted against the second terminal group 133.

The first terminal set 131 includes a first terminal 1311 and a second terminal 1312 exposed in the mating space 1120, and the geometric centers of the connecting sections of the first terminal 1311 and the second terminal 1312 are not centrosymmetric; the second terminal set 133 includes a third terminal 1331 and a fourth terminal 1332 exposed in the docking space 1120, and the geometric centers of the opposite connection sections of the third terminal 1331 and the fourth terminal 1332 are not centrosymmetric; the positive and negative terminals of the battery pack of the present embodiment are also not centrosymmetric with respect to the geometric center of the connection section. The first terminal 1311 is electrically connected to the third terminal 1331, and the second terminal 1312 is electrically connected to the fourth terminal 1332. Since two sets of terminals are provided for interfacing with the battery packs inserted in different postures, respectively, it is not necessary to provide the polarity switching circuit of the foregoing embodiment.

Referring to fig. 9 and 10, in another embodiment, the power tool is an electric drill, and when the battery pack 2 is mounted to the tool body in different postures, the battery pack protrudes from the tool body in a direction perpendicular to the mounting direction by different sizes, so that the power tool can be applied to different narrow spaces while simplifying the mounting process.

In the application, the battery pack can be installed in different postures, so that the outer contour of the battery pack and even the outer contour of the electric tool can be properly adjusted, the battery pack is prevented from interfering with the surrounding environment in a narrow space to influence the operation of a user, and the electric tool can be suitable for the scene of the narrow space; in addition, the battery pack is assembled in different postures, so that the installation process of the battery pack is simplified, and the user experience is improved.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.