Electric hammer and electric tool

Abstract

The utility model relates to an electric hammer and an electric tool. The electric hammer comprises a battery, a motor, a transmission assembly, a working head and a controller. The battery is electrically connected with the motor and the controller. The battery is used for at least providing power for the motor and the controller; the motor is used for transmitting driving force to the working head through the transmission assembly. The controller is used for controlling rotation of the motor; the electric tool further comprises a communication module which is installed on a control panel in the tool handle shell, electrically connected with the controller and used for establishing communication connection with communication equipment so as to receive a control message containing low-voltage protection target value information from the communication equipment. The controller is further used for triggering low-voltage protection when the output value of the battery is lower than the initial low-voltage protection value so that the electric hammer can continue to operate. The endurance time of the electric hammer and the electric tool can be prolonged, and the service life of a battery is not affected.

Description

Technical Field

[0001] This application relates to the field of power tool technology, and in particular to an electric hammer and a power tool. Background Technology

[0002] Currently, to protect the batteries of power tools and extend their lifespan, a higher protection voltage is usually set. When the actual voltage output by the battery falls below the protection voltage, the power tool stops working.

[0003] However, in reality, when the protection voltage is usually set to a higher value, the power tool can still work for a certain period of time after the actual voltage drops below the protection voltage, thus extending the tool's lifespan. And with proper use, this will not affect the tool's lifespan.

[0004] Therefore, improving the battery life of power tools is crucial. Utility Model Content

[0005] In view of this, embodiments of this application provide an electric hammer and a power tool to solve at least one problem existing in the prior art.

[0006] In a first aspect, embodiments of this application provide an electric hammer, which includes a battery, a motor, a transmission assembly, a working head, and a controller; wherein the battery is electrically connected to both the motor and the controller; the battery is used to provide power to at least the motor and the controller; the motor is used to transmit driving force to the working head through the transmission assembly; and the controller is used to control the rotation of the motor.

[0007] The electric hammer also includes a communication module, which is installed on a control board inside the tool handle housing and electrically connected to the controller. It is used to establish a communication connection with the communication device to receive control messages from the communication device containing low-voltage protection target value information.

[0008] The controller is further configured to adjust the initial low-voltage protection value to the low-voltage protection target value when the output value of the battery is lower than the initial low-voltage protection value and low-voltage protection is triggered, so that the electric hammer can continue to operate; wherein the low-voltage protection target value is lower than the initial low-voltage protection value.

[0009] In conjunction with the first aspect, in an optional embodiment, the controller is further configured to trigger the low-voltage protection again when the output value of the battery is lower than the low-voltage protection target value, thereby controlling the electric hammer to stop operating.

[0010] In conjunction with the first aspect, in an optional embodiment, the communication module includes at least one of the following: a short-range communication module; a long-range communication module;

[0011] The short-range communication module includes at least one of the following: Bluetooth module; WIFI module; ZigBee module; Ethernet module; serial port module; parallel port module;

[0012] The remote communication module includes at least one of the following: GPRS module; 2G module; 3G module; 4G module; 5G module; LTE module.

[0013] In conjunction with the first aspect, in an optional embodiment, the low-voltage protection target value includes at least one of the following: low-voltage protection voltage; low-voltage protection current.

[0014] In conjunction with the first aspect, in an optional implementation, the low-voltage protection target value is within the battery safety threshold range.

[0015] In conjunction with the first aspect, in an optional embodiment, the electric hammer further includes a battery detection circuit connected to both the battery and the controller, for detecting the output value of the battery and sending it to the controller.

[0016] In conjunction with the first aspect, in an optional embodiment, the battery detection circuit includes a first resistor and a second resistor;

[0017] The first resistor and the second resistor are connected in series between the power supply terminal of the first battery and the ground terminal, and the connection node between the first resistor and the second resistor is connected to the controller.

[0018] In one optional embodiment, the communication module is connected to the first output terminal of the controller to control the power supply circuit of the communication module to be turned on or off by the level of the first output terminal.

[0019] In conjunction with the first aspect, in an optional embodiment, the electric hammer further includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, and a sixth transistor;

[0020] The control terminal of the first transistor is connected to the second output terminal of the controller, the control terminal of the second transistor is connected to the third output terminal of the controller, the control terminal of the third transistor is connected to the fourth output terminal of the controller, the control terminal of the fourth transistor is connected to the fifth output terminal of the controller, the control terminal of the fifth transistor is connected to the sixth output terminal of the controller, and the control terminal of the sixth transistor is connected to the seventh output terminal of the controller.

[0021] The first transistor and the fourth transistor are connected in series between the first battery power supply terminal and the second battery power supply terminal; the second transistor and the fifth transistor are connected in series between the first battery power supply terminal and the second battery power supply terminal; and the third transistor and the sixth transistor are connected in series between the first battery power supply terminal and the second battery power supply terminal.

[0022] The first connection node between the first transistor and the fourth transistor, the second connection node between the second transistor and the fifth transistor, and the third connection node between the third transistor and the sixth transistor are respectively connected to the motor.

[0023] In conjunction with the first aspect, in an optional embodiment, at least one of the electric hammer and the communication device includes a predetermined display area for displaying and / or adjusting the low-voltage protection target value via an interface to obtain the low-voltage protection target value.

[0024] In conjunction with the first aspect, in an optional embodiment, the adjustment method of the low-voltage protection target value includes at least one of the following: button adjustment; cursor click adjustment; touch adjustment.

[0025] Secondly, embodiments of this application provide an electric tool, the electric tool including a battery, a motor, a working head, and a controller; wherein, the battery is electrically connected to the motor and the controller respectively; the battery is used to provide power to at least the motor and the controller; the motor is used to transmit driving force to the working head; and the controller is used to control the rotation of the motor;

[0026] The power tool also includes a communication module, which is installed on a control board inside the tool handle housing and electrically connected to the controller. It is used to establish a communication connection with a communication device to receive control messages from the communication device containing low-voltage protection target value information.

[0027] The controller is further configured to adjust the initial low-voltage protection value to the low-voltage protection target value when the output value of the battery is lower than the initial low-voltage protection value and low-voltage protection is triggered, so that the electric hammer can continue to operate; wherein the low-voltage protection target value is lower than the initial low-voltage protection value.

[0028] The electric hammer and power tools provided in this application embodiment, by incorporating a communication module within the tool handle housing, can receive control messages sent from communication devices (APP) such as mobile phones, tablets, and smartwatches, thereby obtaining a low-voltage protection target value to adjust the low-voltage protection parameters of the electric hammer and power tools. Therefore, a higher initial low-voltage protection value can be lowered via the APP to a lower low-voltage protection target value set by the user. Even when the actual output value of the battery is lower than the initial low-voltage protection value, the electric hammer and power tools can still trigger low-voltage protection to continue operating, thus extending their runtime without affecting battery life. This proposes a runtime mode adjustment strategy for electric hammers and power tools based on low-voltage (undervoltage) protection value adjustment.

[0029] Additional aspects and advantages of the embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the embodiments of this application. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, are provided. The drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show details of those features. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0031] Figure 1 This is a schematic diagram of a specific example of an electric hammer in the embodiments of this application;

[0032] Figure 2 This is a circuit diagram illustrating a specific example of an electric hammer in an embodiment of this application.

[0033] Figure 3 This is a schematic diagram illustrating a specific example of adjusting the operation interface in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram illustrating another specific example of adjusting the operation interface in the embodiments of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Tool handle; 2. Control panel; 21. Communication module; 3. Operation interface; 31. Input box; 32. Adjustment slider. Detailed Implementation

[0037] To make the technical solution and beneficial effects of this application more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0038] The embodiments described in this application are not exhaustive, but merely illustrative of some embodiments, and are not intended to limit the scope of protection of this application. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined with each other. For example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0039] In each embodiment of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0040] The terminology used in the embodiments of this application is for the purpose of describing specific embodiments only and is not intended to limit the scope of this application.

[0041] In the embodiments of this application, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun after the article can be understood as either a singular expression or a plural expression.

[0042] In the embodiments of this application, "multiple" refers to two or more.

[0043] In some embodiments, the terms “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0044] In some embodiments, the terms “greater than”, “greater than or equal to”, “not less than”, “more than”, “more than or equal to”, “not less than”, “higher than”, “higher than or equal to”, “not lower than”, “above”, “exceeding”, etc. can be used interchangeably, and the terms “less than”, “less than or equal to”, “not greater than”, “less than”, “less than or equal to”, “not more than”, “lower than”, “lower than or equal to”, “not higher than”, “below”, etc. can be used interchangeably.

[0045] The prefixes "first," "second," etc., used in the embodiments of this application are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, value, or content of the descriptive objects. The description of the descriptive objects is based on the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, the numerical value of the descriptive object is not limited by ordinal numbers and can be one or more. Taking "first device" as an example, the numerical value of "device" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the descriptive object is "device," then "first device" and "second device" can be the same device or different devices, and their types can be the same or different.

[0046] In some embodiments, the term "connection" can refer to the transmission of electrical signals or data between the connected end and the connected end, and can be understood as "electrical connection," "communication connection," etc. A "connection" can be a direct connection between two components, an indirect connection established through other components, a connection within two components, or any other possible form of connection.

[0047] This application provides an electric hammer. Figure 1 A schematic diagram of a specific example of an electric hammer according to an embodiment of this application is shown. As shown in the figure, the electric hammer includes a battery, a motor, a transmission assembly, a working head, and a controller. The battery is electrically connected to both the motor and the controller. The battery provides power to at least the motor and the controller. The motor transmits driving force to the working head through the transmission assembly. The controller controls the rotation of the motor.

[0048] The electric hammer also includes a communication module 21, which is installed on the control board 2 inside the housing of the tool handle 1 and is electrically connected to the controller. It is used to establish a communication connection with the communication device to receive control messages from the communication device containing low-voltage protection target value information.

[0049] The controller is further configured to adjust the initial low-voltage protection value to the low-voltage protection target value when the output value of the battery is lower than the initial low-voltage protection value and low-voltage protection is triggered, so that the electric hammer can continue to operate; wherein the low-voltage protection target value is lower than the initial low-voltage protection value.

[0050] Thus, this embodiment of the application, by setting a communication module inside the tool handle housing, can receive control messages sent by communication devices (APP) such as mobile phones, tablets, and smartwatches, thereby obtaining a low-voltage protection target value to adjust the low-voltage protection parameters of the electric hammer. Therefore, a higher initial low-voltage protection value can be lowered via the APP to adjust to a lower low-voltage protection target value set by the user. Even when the actual output value of the battery is lower than the initial low-voltage protection value, the electric hammer can still trigger low-voltage protection, adjusting the initial low-voltage protection value to the low-voltage protection target value so that the electric hammer can continue to operate, thereby extending the electric hammer's runtime without affecting battery life. This proposes a strategy for adjusting the runtime mode of electric hammers and power tools based on low-voltage (undervoltage) protection value adjustment.

[0051] In an optional implementation, the controller is further configured to trigger the low-voltage protection again and control the electric hammer to stop operating when the output value of the battery is lower than the low-voltage protection target value.

[0052] Thus, even when the low-voltage protection is triggered, the electric hammer can still operate for a certain period of time, thereby extending its runtime. Alternatively, the electric hammer can stop operating when the actual output value of the battery falls below the low-voltage protection target value, thus not affecting the battery's lifespan.

[0053] In one optional embodiment, the communication module 21 includes at least one of the following: a short-range communication module; a long-range communication module;

[0054] The short-range communication module includes at least one of the following: Bluetooth module; WIFI module; ZigBee module; Ethernet module; serial port module; parallel port module;

[0055] The remote communication module includes at least one of the following: GPRS module; 2G module; 3G module; 4G module; 5G module; LTE module.

[0056] In this way, the communication module enables communication and interaction between the electric hammer and mobile terminals (such as mobile phones, smartwatches, tablets, etc.) and / or servers. For example, it enables data transmission between the electric hammer and an APP, which improves the intelligence level of the electric hammer and enhances the user experience.

[0057] In this embodiment, the controller can be located on the control board 2 and can be a circuit with signal processing capabilities. In one implementation, the controller can be a circuit with instruction reading and execution capabilities, such as a Central Processing Unit (CPU), a microprocessor (MCU), a graphics processing unit (GPU) (which can be understood as a type of microprocessor), or a digital signal processor (DSP). In another implementation, the controller can implement certain functions through the logical relationships of the hardware circuits. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the controller loading a configuration document and configuring the hardware circuit can be understood as the process of the controller loading instructions to achieve the above functions. In addition, the controller can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a Neural Network Processing Unit (NPU), Tensor Processing Unit (TPU), Deep Learning Processing Unit (DPU), etc.

[0058] A server can be a standalone physical server, a server cluster or distributed system consisting of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content delivery networks (CDNs), and big data and artificial intelligence platforms.

[0059] In one optional implementation, the low-voltage protection target value includes at least one of the following: low-voltage protection voltage; low-voltage protection current.

[0060] Thus, by reducing the low-voltage protection voltage or current, the low-voltage protection power (i.e., the low-voltage protection target value) is reduced, enabling various methods of adjusting the hammer drill's runtime. For example, in the hammer drill's long-run mode, the runtime can be extended by adjusting the low-voltage protection target value.

[0061] In one alternative implementation, the low-voltage protection target value is within the battery safety threshold range.

[0062] Therefore, by setting the low-voltage protection target value within the battery safety threshold range, not only can the battery life be increased, but the battery lifespan can also be maintained.

[0063] Different battery pack platforms (such as 12V, 16V, 20V, etc.) have different battery safety threshold ranges. When the battery output value is not below the battery safety threshold range, it usually does not affect the battery life and poses no safety risk. Therefore, different low-voltage protection target values ​​can be set according to actual needs to keep it within the battery safety threshold range, thus achieving the goal of not affecting battery life and posing no safety risk. For example, the low-voltage protection voltage can be adjusted from 16V to 15V. 15V is within the battery safety threshold range, which can increase the driving range without affecting the battery life.

[0064] Figure 2 A circuit diagram of a specific example of an electric hammer in an embodiment of this application is shown. As shown in the figure, in an optional embodiment, the electric hammer further includes a battery detection circuit, which is connected to the battery and the controller respectively, for detecting the output value of the battery and sending it to the controller.

[0065] In some examples, the battery detection circuit includes a first resistor R1 and a second resistor R2;

[0066] The first resistor R1 and the second resistor R2 are connected in series between the first battery power supply terminal B+ and the ground terminal, and the connection node between the first resistor R1 and the second resistor R2 is connected to the controller.

[0067] Thus, by dividing the voltage through the first resistor R1 and the second resistor R2, the divided voltage is used for battery pack voltage detection, thereby obtaining the battery's output value, simplifying the structure and improving stability.

[0068] In this embodiment of the application, the first battery power supply terminal B+ can be connected to the positive terminal of the battery, and the second battery power supply terminal B- can be connected to the negative terminal of the battery.

[0069] In an optional embodiment, the communication module 21 is connected to the first output terminal (out) of the controller to control the power supply circuit of the communication module 21 to be turned on or off by means of the level of the first output terminal.

[0070] In this embodiment, the number of controller first output terminals connected to the communication module 21 can be set according to actual needs. For example, when multiple controller first output terminals are needed to control the power on / off of the communication module 21, the opening or closing of the communication function, the sending of communication requests, etc., the communication module 21 can be connected to multiple controller first output terminals.

[0071] In an optional embodiment, the electric hammer further includes a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, and a sixth transistor Q6;

[0072] The control terminal of the first transistor Q1 is connected to the second output terminal of the controller, the control terminal of the second transistor Q2 is connected to the third output terminal of the controller, the control terminal of the third transistor Q3 is connected to the fourth output terminal of the controller, the control terminal of the fourth transistor Q4 is connected to the fifth output terminal of the controller, the control terminal of the fifth transistor Q5 is connected to the sixth output terminal of the controller, and the control terminal of the sixth transistor Q6 is connected to the seventh output terminal of the controller.

[0073] The first transistor Q1 and the fourth transistor Q4 are connected in series between the first battery power supply terminal B+ and the second battery power supply terminal B-, the second transistor Q2 and the fifth transistor Q5 are connected in series between the first battery power supply terminal B+ and the second battery power supply terminal B-, and the third transistor Q3 and the sixth transistor Q6 are connected in series between the first battery power supply terminal B+ and the second battery power supply terminal B-.

[0074] The first connection node between the first transistor Q1 and the fourth transistor Q4, the second connection node between the second transistor Q2 and the fifth transistor Q5, and the third connection node between the third transistor Q3 and the sixth transistor Q6 are respectively connected to the motor.

[0075] Thus, a brushless motor drive circuit can be formed by the first transistor Q1, the second transistor Q2, the third transistor Q3, the fourth transistor Q4, the fifth transistor Q5, and the sixth transistor Q6, thereby controlling the rotation of the motor. These transistors can include controllable semiconductor switching devices such as MOSFETs and BJTs, for example, an N-channel MOSFET.

[0076] In some examples, the electric hammer also includes a trigger interface;

[0077] The trigger of the electric hammer is connected to the trigger interface for connection with the controller; the trigger is used at least to control the start and stop of the electric hammer.

[0078] In some examples, the trigger interface may include a first connection terminal (Key terminal), a second connection terminal (Fwr terminal), and a third connection terminal (Rev terminal). Trigger operation changes the voltage level of the Key terminal to control motor start / stop, and to detect motor start signals. Forward start operation changes the voltage level of the Fwr terminal to control motor forward rotation. Reverse start operation changes the voltage level of the Rev terminal to control motor reverse rotation.

[0079] In some examples, the controller can be an MCU. The hammer drill also includes an LDO, which can provide a stable 5V voltage to power the MCU. The hammer drill also includes a current sensing module, which can be a sampling resistor RS1; one end of the current sensing module can be connected to the fourth transistor Q4, the fifth transistor Q5, and the sixth transistor Q6 respectively, and the other end can be connected to the second battery power supply terminal B-.

[0080] In the embodiments of this application, the transistor can be a single transistor; or it can be a series and / or parallel connection of multiple transistors, having a control terminal, a first signal terminal and a second signal terminal corresponding to a single transistor.

[0081] A resistor can be a single resistor, or multiple resistors connected in series and / or in parallel; it can also be a passive resistor network including resistors, capacitors, inductors, etc., or an active resistor network.

[0082] In an optional embodiment, at least one of the electric hammer and the communication device includes a predetermined display area for displaying and / or adjusting the low-voltage protection target value via an operation interface 3 to obtain the low-voltage protection target value.

[0083] In some examples, the mobile app may have an interface 3 for adjusting the electric hammer's operating mode (such as adjusting the low-voltage protection target value), so that users can adjust the expected activation low-voltage protection value (i.e., the low-voltage protection target value) through the app's interface 3.

[0084] In some examples, the electric hammer may also be equipped with a display screen with or without touch functionality, which can display the aforementioned operation interface 3. Thus, the user can directly adjust the low-voltage protection target value through the operation interface 3 of the electric hammer display screen, or adjust the low-voltage protection target value through knobs, etc., and display the adjusted low-voltage protection target value on the operation interface of the display screen.

[0085] Figure 3 A schematic diagram illustrating a specific example of adjusting the operation interface in an embodiment of this application is shown. Figure 4 A schematic diagram of another specific example of adjusting the operation interface in an embodiment of this application is shown. As shown in the figure, the operation interface 3 is used to display the battery safety threshold range so that the determined low-voltage protection target value is within the battery safety threshold range.

[0086] The operation interface 3 includes at least one of the following: an input box 31; and an adjustment slider 32.

[0087] refer to Figure 3 and Figure 4In some examples, by adjusting slider 32, the low-voltage protection target value can be adjusted to any value between 15V and 16V, and input box 31 can display the current adjusted value. Input box 31 can also be used to directly input the desired low-voltage protection target value.

[0088] The app's interface can be displayed on mobile phone screens, tablet screens, smartwatch screens, etc.

[0089] In one optional embodiment, the adjustment method of the low-voltage protection target value includes at least one of the following: button adjustment; cursor click adjustment; touch adjustment.

[0090] In this way, page control or data input can be achieved through buttons, cursors, or touch.

[0091] This application also provides a power tool, which may include at least one of the following: a miter saw, an electric drill, an electric hammer, a polisher, a cutting machine, an engraving machine, and other power tools. In some examples, the power tool may include a transmission assembly, through which the working head receives driving force from a motor, such as an electric hammer. In some examples, the power tool may not have a transmission assembly, and the working head may directly receive driving force from a motor.

[0092] The power tool includes a battery, a motor, a working head, and a controller; wherein the battery is electrically connected to both the motor and the controller; the battery provides power to at least the motor and the controller; the motor transmits driving force to the working head; and the controller controls the rotation of the motor.

[0093] The power tool also includes a communication module, which is installed on a control board inside the tool handle housing and electrically connected to the controller. It is used to establish a communication connection with a communication device to receive control messages from the communication device containing low-voltage protection target value information.

[0094] The controller is further configured to adjust the initial low-voltage protection value to the low-voltage protection target value when the output value of the battery is lower than the initial low-voltage protection value and low-voltage protection is triggered, so that the electric hammer can continue to operate; wherein the low-voltage protection target value is lower than the initial low-voltage protection value.

[0095] In this embodiment, a communication module is installed inside the tool handle housing to receive control messages sent by communication devices (APP) such as mobile phones, tablets, and smartwatches, thereby obtaining a low-voltage protection target value to adjust the low-voltage protection parameters of the power tool. Therefore, a higher initial low-voltage protection value can be lowered via the APP to a lower low-voltage protection target value set by the user. Even when the actual output value of the battery is lower than the initial low-voltage protection value, the power tool can still trigger low-voltage protection to allow it to continue operating, thus extending its battery life without affecting battery life. This proposes a power tool battery life adjustment strategy based on low-voltage (undervoltage) protection value adjustment.

[0096] The power tools in this application embodiment can be specifically referred to in the above embodiments. The electric hammer in the above embodiments can be replaced with power tools. The specific implementation process and technical effects are as described above, and will not be repeated here.

[0097] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in this application. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. An electric hammer characterized by comprising: The electric hammer comprises a battery, a motor, a transmission assembly, a working head and a controller; the battery is electrically connected with the motor and the controller respectively; the battery is used for providing power supply for at least the motor and the controller; the motor is used for transmitting driving force to the working head through the transmission assembly; the controller is used for controlling rotation of the motor; The electric hammer further comprises a communication module installed on a control board in the tool handle shell and electrically connected with the controller, used for establishing communication connection with a communication device to receive a control message containing low-voltage protection target value information from the communication device; The controller is further used for adjusting the initial low-voltage protection value to the low-voltage protection target value when low-voltage protection is triggered due to that the output value of the battery is lower than the initial low-voltage protection value, so as to make the electric hammer continue to operate; the low-voltage protection target value is lower than the initial low-voltage protection value.

2. The hammer drill according to claim 1, characterized in that The controller is further used for triggering low-voltage protection again and controlling the electric hammer to stop operating when the output value of the battery is lower than the low-voltage protection target value.

3. The hammer drill of claim 1, wherein, The communication module comprises at least one of the following: a short-distance communication module; a long-distance communication module; The short-distance communication module comprises at least one of the following: a Bluetooth module; a WIFI module; a ZigBee module; an Ethernet module; a serial port module; and a parallel port module; The long-distance communication module comprises at least one of the following: a GPRS module; a 2G module; a 3G module; a 4G module; a 5G module; and an LTE module.

4. The hammer drill of claim 1, wherein, The low-voltage protection target value comprises at least one of the following: a low-voltage protection voltage; and a low-voltage protection current.

5. The hammer drill of claim 1, wherein, The low-voltage protection target value is within a battery safety threshold range.

6. The hammer drill of claim 1, wherein, The electric hammer further comprises a battery detection circuit connected with the battery and the controller respectively, used for detecting the output value of the battery and sending the output value to the controller.

7. The hammer drill of claim 1, wherein, The battery detection circuit comprises a first resistor and a second resistor; The first resistor and the second resistor are connected in series between a first battery power supply end and a ground end, and a connection node between the first resistor and the second resistor is connected with the controller.

8. The hammer drill of claim 1, wherein, The communication module is connected with a first output end of the controller, so as to control on or off of a power supply loop of the communication module through a level of the first output end.

9. The hammer drill of claim 1, wherein, The electric hammer further comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor and a sixth transistor; A control end of the first transistor is connected with a second output end of the controller, a control end of the second transistor is connected with a third output end of the controller, a control end of the third transistor is connected with a fourth output end of the controller, a control end of the fourth transistor is connected with a fifth output end of the controller, a control end of the fifth transistor is connected with a sixth output end of the controller, and a control end of the sixth transistor is connected with a seventh output end of the controller; The first transistor and the fourth transistor are connected in series between the first battery power supply end and a second battery power supply end, the second transistor and the fifth transistor are connected in series between the first battery power supply end and the second battery power supply end, and the third transistor and the sixth transistor are connected in series between the first battery power supply end and the second battery power supply end. The first connection node between the first transistor and the fourth transistor, the second connection node between the second transistor and the fifth transistor, and the third connection node between the third transistor and the sixth transistor are connected with the motor respectively.

10. The hammer drill of claim 1, wherein, The at least one of the electric hammer and the communication device comprises a predetermined display area for displaying and / or adjusting an operation interface of the low-voltage protection target value to obtain the low-voltage protection target value.

11. The hammer drill according to any one of claims 1 to 10, characterized in that The adjustment mode of the low-voltage protection target value comprises at least one of the following: button adjustment, cursor click adjustment, and touch adjustment.

12. An electric power tool characterized by comprising: The electric tool comprises a battery, a motor, a working head, and a controller; the battery is electrically connected with the motor and the controller respectively; the battery is used to provide a power supply for at least the motor and the controller; the motor is used to transmit driving force to the working head; the controller is used to control rotation of the motor; The electric tool further comprises a communication module installed on a control board in a tool handle shell and electrically connected with the controller, and used to establish a communication connection with a communication device to receive a control message containing low-voltage protection target value information from the communication device; The controller is further used to adjust an initial low-voltage protection value to the low-voltage protection target value when low-voltage protection is triggered when the output value of the battery is lower than the initial low-voltage protection value, so that the electric tool continues to operate; wherein the low-voltage protection target value is lower than the initial low-voltage protection value.

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