Electric tool

Abstract

The utility model provides an electric tool, and relates to the field of tools. Two battery connection sockets; the first circuit is provided with a first switch; a second line; the two first batteries comprise first connectors which can be inserted into the battery combination hubs and connect the electric energy of the first batteries into the first circuit; under the condition that the first switch is switched on and the second switch is switched off, the two first lines form a parallel circuit to supply power; the second battery comprises a second connector which can be inserted into the battery combination hub and is used for connecting the electric energy of the second battery into the first circuit, and the second connector is not provided with a conducting part; under the condition that the second battery is inserted into the battery combination hub, the first switch is switched off; under the condition that the first switch is switched off and the second switch is switched on, the two first lines form a series circuit through the second line to supply power; the rated voltages of the second battery and the first battery are different. According to the technical scheme, the required voltage or capacity can be obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tools powered by electric machines, and in particular to an electric power tool. BACKGROUND

[0002] Among hand-held tools, electric power tools have the feature of being more environmentally friendly. With the development of battery technology, the power supply of electric power tools can be provided by detachable batteries.

[0003] However, in order to maintain the portability of electric power tools, detachable batteries are designed in various specifications, resulting in non-uniformity of the power supply voltage or capacity provided by the batteries, and further resulting in the technical problem of unstable working performance of electric power tools. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides an electric power tool to solve at least one problem in the background art.

[0005] To achieve the above-mentioned purpose, the technical solution of the present application is as follows:

[0006] The present application provides an electric power tool, comprising:

[0007] a casing;

[0008] two battery sockets arranged in the casing, the battery sockets comprising a first circuit; the first circuit is provided with a first switch;

[0009] a second circuit, both ends of which are connected to the first circuit of the two battery sockets, and the second circuit is provided with a second switch;

[0010] two first batteries comprising a first connector capable of being inserted into the battery socket and connecting the electric energy of the first battery to the first circuit, the first connector being provided with a conduction part; the conduction part is configured to turn on the first switch when the two first batteries are inserted into the two battery sockets; when the first switch is turned on and the second switch is turned off, the two first circuits form a parallel circuit for power supply;

[0011] or two second batteries comprising a second connector capable of being inserted into the battery socket and connecting the electric energy of the second battery to the first circuit, the second connector being provided with no conduction part; when the second battery is inserted into the battery socket, the first switch is turned off; when the first switch is turned off and the second switch is turned on, the two first circuits form a series circuit for power supply via the second circuit; the rated voltage of the second battery is different from that of the first battery.

[0012] Optionally, a short-circuit protection member is arranged in the second circuit, so that the second circuit will not be short-circuited when both the first switch and the second switch are turned on.

[0013] Optionally, the short-circuit protection member is a fuse or an automatic fuse switch; when the current of the second circuit is greater than a first preset value, the fuse or the automatic fuse switch is disconnected.

[0014] Optionally, one end of the first circuit is an input end and the other end is an output end; one end of the second circuit is electrically connected to one of the first circuits and is electrically connected to the input end only through the first switch; the other end of the second circuit is electrically connected to another of the first circuits and is electrically connected to the output end only through the first switch.

[0015] Optionally, the rated voltage of the first battery is greater than that of the second battery.

[0016] Optionally, the rated voltage of the first battery is twice that of the second battery.

[0017] Optionally, the first switch is a press switch, and the conductive part is a protrusion that is pressed when the first battery is inserted into the battery socket.

[0018] Optionally, the second switch is a gear switch.

[0019] Optionally, the two battery sockets are symmetrically arranged on two sides of the casing.

[0020] Optionally, the battery socket is provided with a plurality of first socket copper bars; the first battery and the second battery are provided with a plurality of second socket copper bars that are electrically connected to the first socket copper bars.

[0021] The electric tool provided by the embodiment of the present application comprises: a casing; two battery sockets arranged in the casing, the battery sockets comprising first lines; the first lines are provided with first switches; second lines, two ends of the second lines are connected with the first lines of the two battery sockets respectively, and the second lines are provided with second switches; two first batteries, comprising first connectors capable of being inserted into the battery sockets and connecting electric energy of the first batteries to the first lines, the first connectors are provided with conducting portions; the conducting portions are configured to turn on the first switches when the two first batteries are inserted into the two battery sockets; when the first switches are turned on and the second switches are turned off, the two first lines form a parallel circuit to supply power; or two second batteries, comprising second connectors capable of being inserted into the battery sockets and connecting electric energy of the second batteries to the first lines, the second connectors are not provided with conducting portions; when the second batteries are inserted into the battery sockets, the first switches are turned off; when the first switches are turned off and the second switches are turned on, the two first lines form a series circuit via the second lines to supply power; the rated voltages of the second batteries and the first batteries are different. It can be seen that the electric tool of the embodiment of the present application can obtain required voltages or capacities by arranging the first switches on the first lines of the two battery sockets, adding the second lines and the second switches, turning on or off the first switches automatically by inserting batteries of different specifications, and combining the on-off of the second switches to combine the voltages or capacities of the two batteries in series or in parallel to obtain required voltages or capacities. Therefore, the electric tool of the embodiment of the present application can obtain required voltages or capacities.

[0022] Additional aspects and advantages of the present application will be made apparent by the following description and the specific description of the embodiments thereof. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the principles of the present application, and do not limit the present application in any manner. In the drawings:

[0024] Figure 1 A schematic diagram of the electric tool provided by the embodiment of the present application;

[0025] Figure 2 A schematic diagram of the electric tool provided by the embodiment of the present application;

[0026] Figure 3 A schematic diagram of the electric tool provided by the embodiment of the present application;

[0027] Figure 4 A schematic diagram of the electric tool provided by the embodiment of the present application;

[0028] Figure 5 A schematic view of a first battery in an electric tool according to an embodiment of the present application is provided in the figure;

[0029] Figure 6 A schematic view of a second battery in an electric tool according to an embodiment of the present application is provided in the figure;

[0030] Figure 7 A schematic view of a second battery in an electric tool according to an embodiment of the present application is provided in the figure.

[0031] Explanation of Reference Signs:

[0032] 10, housing; 20, battery socket; 21, first circuit; 22, first switch; 30, second circuit; 31, second switch; 32, short-circuit protection; 40, first battery; 41, first connector; 411, second connector; 42, conducting part; 50, second battery; 51, second connector. DETAILED DESCRIPTION

[0033] In order to make the technical solutions and advantages of the present application more obvious and easy to understand, the following will be described in detail by listing specific embodiments. The drawings are not necessarily drawn to scale, and local features can be enlarged or reduced to more clearly show the details of local features; unless otherwise defined, the technical and scientific terms used herein have the same meaning as the technical and scientific terms in the technical field to which the present application belongs.

[0034] In the description of the present application, the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of the simplified description of the present application, and do not indicate that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, i.e. cannot be understood as limiting the present application.

[0035] In the present application, the terms "first" and "second" are only used for the purpose of clear description, and cannot be understood as the relative importance of the indicated features or the number of indicated technical features. Therefore, the features defined with "first" and "second" can explicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc.; the meaning of "several" is at least one, such as one, two, three, etc.; except for explicit specific limitations.

[0036] In the present application, unless specifically defined otherwise, the terms "mount", "connect", "connection", "fixed", "set", and the like should be construed broadly. For example, "connection" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium, or internal connection of two elements, or interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In the present application, unless specifically defined otherwise, the first feature "on", "over", "above" and "upper", "under", "below", "under" or "under" of the second feature can be direct contact between the first feature and the second feature, or indirect contact between the first feature and the second feature through intermediate medium. Moreover, the first feature "over", "above" and "above" of the second feature can be directly above or obliquely above the first feature above the second feature, or only indicate that the horizontal height of the first feature is higher than the horizontal height of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature below the second feature, or only indicate that the horizontal height of the first feature is less than the horizontal height of the second feature.

[0038] In order to thoroughly understand the present application, detailed steps and detailed structures will be proposed in the following description in order to explain the technical solutions of the present application. The preferred embodiments of the present application are described in detail as follows, however, in addition to these detailed descriptions, the present application can also have other implementation manners.

[0039] In view of the technical problems in the related art, the embodiments of the present application provide an electric tool. Referring to Figures 1-3 , the electric tool comprises:

[0040] A casing 10;

[0041] Two battery sockets 20 are arranged in the casing 10, and the battery socket 20 comprises a first line 21; the first line 21 is provided with a first switch 22;

[0042] A second line 30 is connected to the first line 21 of the two battery sockets 20 at both ends, and the second line 30 is provided with a second switch 31;

[0043] Two first batteries 40, comprising a first connector 41 capable of being inserted into the battery connector 20 and connecting the electric energy of the first battery 40 to the first line 21, the first connector 41 being provided with a conducting part 42; the conducting part 42 is configured to turn on the first switch 22 when two first batteries 40 are inserted into two battery connectors 20; when the first switch 22 is turned on and the second switch 31 is turned off, two first lines 21 form a parallel circuit for power supply.

[0044] Or two second batteries 50, comprising a second connector 51 capable of being inserted into the battery connector 20 and connecting the electric energy of the second battery 50 to the first line 21, the second connector 51 being not provided with a conducting part 42; when the second battery 50 is inserted into the battery connector 20, the first switch 22 is turned off; when the first switch 22 is turned off and the second switch 31 is turned on, two first lines 21 form a series circuit for power supply via the second line 30; the rated voltage of the second battery 50 and the first battery 40 is different.

[0045] The electric tool of the embodiment can be an electric wrench. Compared with other electric tools, the electric wrench has a larger output torque and a larger rated power of the motor, and thus needs a battery with a larger voltage or a larger capacity. Hereinafter, the embodiment of the application is mainly described by taking the electric wrench as an example. It can be understood that the technical solution of the embodiment of the application is also applicable to other electric tools.

[0046] As can be seen from the above, the first switch 22 does not need to be manually operated by the user, for example, the first switch 22 can be turned on after the first battery 40 is inserted into the battery connector 20, or the first switch 22 maintains the off state after the second battery 50 is inserted into the battery connector 20.

[0047] It should be noted that the second switch 31 needs to be manually operated by the user. Moreover, the second switch 31 needs to be operated according to the type of the battery, for example, the second switch 31 needs to be manually turned off by the user before the first battery 40 is inserted into the battery connector 20.

[0048] Through cooperation of the first switch 22 and the second switch 31, two first lines 21 can form a parallel circuit for power supply, or two first lines 21 can form a series circuit for power supply. Since the rated voltage of the second battery 50 and the first battery 40 is different, the required rated voltage or rated capacity of the power supply can be obtained according to the setting.

[0049] It can be understood that the conducting part 42 can turn on the first switch 22 through a mechanical structure, or can trigger the first switch 22 to turn on through an electric signal, an optical signal or the like, which is not limited herein.

[0050] The electric tool of the application embodiment, by setting the first switch 22 on the first line 21 of the two battery sockets 20, adding the second line 30 and the second switch 31, wherein the first switch 22 can be automatically opened or closed by inserting the battery of different specifications, and by cooperating with the on-off of the second switch 31, the voltage or capacity of the two batteries can be combined in series or parallel to obtain the required voltage or capacity.

[0051] In some other embodiments of the application, the second line 30 is provided with a short-circuit protection 32, so that when the first switch 22 and the second switch 31 are both on, the second line 30 will not be short-circuited.

[0052] As described above, since the second switch 31 needs to be manually operated by the user, if the user does not manually disconnect the second switch 31 before the first battery 40 is inserted into the battery socket 20, the second line 30 may short-circuit the first line 21, and the battery cannot supply power. Therefore, the short-circuit protection 32 is provided to make the battery supply more stable. The battery can be a general term for the first battery 40 and the second battery 50.

[0053] In some other embodiments of the application, the short-circuit protection 32 is a fuse or an automatic fuse switch; when the current of the second line 30 is greater than a first preset value, the fuse or the automatic fuse switch is disconnected.

[0054] It can be understood that when a short circuit occurs, the current of the second line 30 will increase significantly, and therefore a fuse or an automatic fuse switch can be provided for control. Through the fuse or the automatic fuse switch, the second line 30 can be automatically cut off when a short circuit occurs.

[0055] The automatic fuse switch can also be automatically reset after the short circuit state is removed, while the fuse needs to be manually replaced by the user. In this way, the fuse or the automatic fuse switch can protect the entire circuit from being damaged due to a short circuit.

[0056] In some other embodiments of the application, one end of the first line 21 is an input end, and the other end is an output end; one end of the second line 30 is electrically connected to one of the first lines 21, and is electrically connected to the input end only through the first switch 22; the other end of the second line 30 is electrically connected to the other first line 21, and is electrically connected to the output end only through the first switch 22.

[0057] In this way, after the second battery 50 is inserted into the battery socket 20, the two first lines 21 can form a series circuit, and both of the second batteries 50 can supply power in the series circuit.

[0058] In some embodiments of the present application, the rated voltage of the first battery 40 is greater than the rated voltage of the second battery 50.

[0059] According to the principle of series voltage division and parallel current division, when the first battery 40 is inserted into the battery socket 20, the two first lines 21 form a parallel circuit, and the voltages of the two first batteries 40 cannot be added together, but the capacities can be added together. Therefore, the voltage of the first battery 40 is set to be higher, which can provide higher capacity.

[0060] Similarly, when the second battery 50 is inserted into the battery socket 20, the two first lines 21 form a series circuit, and the voltages of the two second batteries 50 can be added together. Therefore, the voltage of the second battery 50 can be set to be lower.

[0061] In some embodiments of the present application, the rated voltage of the first battery 40 is twice the rated voltage of the second battery 50.

[0062] According to the above description, since the voltages of the two second batteries 50 can be added together when the second battery 50 is inserted into the battery socket 20, the rated voltage of the first battery 40 is twice the rated voltage of the second battery 50. Therefore, using any one of the first battery 40 and the second battery 50, the output voltage is the same. This can provide more stable performance for most electric tools using series motors or DC motors.

[0063] In some embodiments of the present application, referring to Figure 4 , Figure 5 and Figure 7 , the first switch 22 is a press switch, and the conductive part 42 is a protrusion that presses the first switch 22 when the first battery 40 is inserted into the battery socket 20.

[0064] That is, the first switch 22 is controlled in a mechanical manner. In this way, it is reliable and low in cost.

[0065] In some embodiments of the present application, the second switch 31 is a dial switch.

[0066] In this way, it is convenient for the user to manually operate. Further, the dial switch can be provided with marks of corresponding battery rated voltages to facilitate operation. For example, one side of the dial switch is marked with the rated voltage of the first battery 40, and the other side of the dial switch is marked with the rated voltage of the second battery 50.

[0067] In some embodiments of the present application, referring to Figure 1 , the two battery sockets 20 are symmetrically arranged on two sides of the casing 10.

[0068] In this way, the inserted battery is also symmetrical to the case 10, so that the center of gravity of the power tool is balanced.

[0069] In some embodiments of the present application, with reference to Figure 4 and Figure 6 The battery socket 20 is provided with a plurality of first socket copper bars; the first battery 40 and the second battery 50 are provided with a plurality of second socket copper bars 411 electrically connected with the plurality of socket copper bars.

[0070] In this way, on the one hand, the connection between the battery and the first line 21 is more reliable, and disconnection caused by poor contact is avoided. On the other hand, the total cross-sectional area of the conductor can be increased, and the resistance can be reduced.

[0071] It should be understood that the above embodiments are exemplary and are not intended to include all possible implementations of the technical solutions of the present application. Various modifications and changes can also be made on the basis of the above embodiments without departing from the scope of the present application. Similarly, any combination of the technical features of the above embodiments can also be made to form additional embodiments of the present application which can not have been explicitly described. Therefore, the above embodiments only express several implementation manners of the present application, and do not limit the protection scope of the patent of the present application.

Claims

1. A power tool characterized by comprising: The utility model relates to a battery power supply device, including: A cabinet (10); Two battery sockets (20) are arranged in the cabinet (10), and the battery socket (20) includes a first line (21); the first line (21) is provided with a first switch (22); A second line (30) is connected to the first line (21) of the two battery sockets (20) respectively, and the second line (30) is provided with a second switch (31); Two first batteries (40) include a first connector (41) that can be inserted into the battery socket (20) and connect the power of the first battery (40) to the first line (21), and the first connector (41) is provided with a conducting part (42); the conducting part (42) is configured to turn on the first switch (22) when the two first batteries (40) are inserted into the two battery sockets (20); when the first switch (22) is turned on and the second switch (31) is turned off, the two first lines (21) form a parallel circuit to supply power; Or two second batteries (50) include a second connector (51) that can be inserted into the battery socket (20) and connect the power of the second battery (50) to the first line (21), and the second connector (51) is not provided with a conducting part (42); when the second battery (50) is inserted into the battery socket (20), the first switch (22) is turned off; when the first switch (22) is turned off and the second switch (31) is turned on, the two first lines (21) form a series circuit via the second line (30) to supply power; the rated voltage of the second battery (50) and the first battery (40) is different.

2. The power tool of claim 1, wherein, The second line (30) is provided with a short-circuit protection device (32) to prevent the second line (30) from short-circuiting when the first switch (22) and the second switch (31) are both turned on.

3. The power tool of claim 2, wherein, The short-circuit protection device (32) includes a fuse or an automatic fuse switch; when the current of the second line is greater than a first preset value, the fuse or the automatic fuse switch is turned off.

4. The power tool of claim 1, wherein, One end of the first line (21) is an input end, and the other end is an output end; one end of the second line (30) is electrically connected to one of the first lines (21), and only via the first switch (22) is electrically connected to the input end; the other end of the second line (30) is electrically connected to the other first line (21), and only via the first switch (22) is electrically connected to the output end.

5. The power tool of claim 1, wherein, The rated voltage of the first battery (40) is greater than that of the second battery (50).

6. The power tool of claim 5, wherein, The rated voltage of the first battery (40) is twice that of the second battery (50).

7. The power tool of claim 1, wherein, The first switch (22) is a press switch, and the conducting part (42) is a protrusion that presses the first switch (22) when the first battery (40) is inserted into the battery socket (20).

8. The power tool of any of claims 1-7, wherein, The second switch (31) is a dial switch.

9. The power tool of any of claims 1-7, wherein, Two battery sockets (20) are symmetrically arranged on two sides of the shell (10).

10. The power tool of any one of claims 1-7, wherein, The battery socket (20) is provided with a plurality of first socket copper bars; the first battery (40) and the second battery (50) are provided with a plurality of second socket copper bars (411) electrically connected with the plurality of socket copper bars.

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