Power tool and control method thereof

Abstract

The present invention relates to an electric tool and a control method thereof. The electric tool comprises: a drive assembly, a first output unit, a second output unit, a user-operated switching assembly, an identification unit, a control unit, and a user-triggered first control assembly. The switching assembly switches the connection between the first output unit and the second output unit and the drive assembly. The identification assembly identifies the operating mode of the electric tool. When in the first operating mode, the control unit controls the first control assembly to be in an active state and controls the operating state of the first output unit based on a signal input from the first control assembly. When in the second operating mode, the control unit controls the first control assembly to be in an inactive state. The electric tool of the present invention has the technical advantages of multiple operating modes without mutual interference, stable performance, and high safety.

Description

Technical Field

[0001] The present invention relates to the technical field of electric tools, and in particular to an electric tool and a control method thereof. Background Art

[0002] Power tools are machines whose output unit is driven by a motor to perform work on a workpiece. Depending on the type of output unit, they can perform a variety of functions, such as fastening, cutting, polishing, grinding, and drilling, meeting the diverse needs of users. When doing DIY crafts at home, two tools are often used frequently. For example, frequently using a screwdriver (for fastening) and an electric grinder (for grinding) to process wood requires frequent use. This forces the user to fetch two tools back and forth, which is very inconvenient. Purchasing two tools undoubtedly increases the user's cost of use. Having multiple tools also takes up more living space, which is also disadvantageous to the user.

[0003] At present, there is an electric tool with multiple working heads on the market. Different types of working heads have different functions. Users can switch the working heads according to their needs. Users can use one tool to achieve at least two of the above-mentioned multiple functions. The purchase cost is reduced and the user is convenient to use, which solves the above-mentioned user needs.

[0004] The power tool's housing is equipped with user-triggered control components, such as a start switch and a speed setting button. A controller receives input signals from the control components to control the operation of the motor. For the multiple working heads on a power tool, a set of independent, user-triggered control components are provided on the power tool's housing to control the operation of the motor and tool for different functions. However, this can easily lead to accidental triggering of control components, resulting in confusing control functions, poor performance, and even safety issues. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides an electric tool, comprising a drive component, a first output part, a second output part, a user-operated switching component, an identification unit, a control unit, and a user-triggered control component; the drive component provides a driving force for driving the first output part and the second output part to work; the switching component moves under user operation, thereby switching between a first position and a second position; when the switching component is in the first position, the drive component and the first output part are in a connected state, the drive component and the second output part are in a disconnected state, and the electric tool is in a first working mode; when the switching component is in the second position, the drive component and the first output part are in a disconnected state, and the drive component and the second output part are in a disconnected state. The second output parts are in a connected state, and the power tool is in the second working mode; the identification unit is connected to the control unit, and the control unit identifies the position of the switching component according to the identification unit to identify the working mode of the power tool; the control component includes a first control component triggered by the user, and the control unit is connected to the first control component; when the control unit recognizes that the power tool is in the first working mode, the control unit controls the first control component to be in an effective state, and the control unit controls the working state of the first output part according to the signal input by the first control component; when the control unit recognizes that the power tool is in the second working mode, the control unit controls the first control component to be in an invalid state.

[0006] Preferably, the control component includes a second control component triggered by the user, and the control unit is connected to the second control component; when the control unit recognizes that the power tool is in the first working mode, the control unit controls the second control component to be in an invalid state; when the control unit recognizes that the power tool is in the second working mode, the control unit controls the second control component to be in an effective state, and the control unit controls the working state of the second output part according to the signal input by the second control component.

[0007] Preferably, the first control component includes a first start-stop switch operated by the user, which is used to control the start and stop of the drive component; the second control component includes a second start switch operated by the user, which is used to control the start and stop of the drive component.

[0008] Preferably, the first control component includes a first parameter setting component operated by a user, which is used to control the working parameters of the drive component; the second control component includes a second parameter setting component operated by a user, which is used to control the working parameters of the drive component.

[0009] Preferably, the operating parameters include at least one of direction, speed, current, voltage and torque.

[0010] Preferably, the switching component also includes a third position. When the switching component is in the third position, the driving component and the first output part are in a disconnected state, and the driving component and the second output part are in a disconnected state. When the control unit recognizes that the switching component is in the third position, the control unit controls the first control component and the second control component to be in an invalid state.

[0011] Preferably, when the electric tool is in different working modes, the control unit sends corresponding control signals to the driving component.

[0012] Preferably, the first working mode is a screwdriver mode executed by the first output unit, and the second working mode is an electric grinding mode executed by the second output unit.

[0013] Preferably, the identification unit includes a trigger and a sensing member, and the trigger is arranged on the switching component; the sensing member moves relative to the trigger, and is used to sense the trigger and generate a sensing signal; the control unit is connected to the sensing member, receives the sensing signal, and identifies the position of the switching component according to the sensing signal.

[0014] Preferably, the triggering member includes a first triggering member corresponding to the first output part and a second triggering member corresponding to the second output part, and the sensing member includes a first sensing member corresponding to the first output part and a second sensing member corresponding to the second output part. When the switching component is in the first position, the first triggering member triggers the first sensing member, and the second sensing member is not triggered. The control unit receives a first sensing signal from the first sensing member to thereby identify that the switching component is in the first position; when the switching component is in the second position, the second triggering member triggers the second sensing member, and the first sensing member is not triggered. The control unit receives a second sensing signal from the second sensing member to thereby identify that the switching component is in the second position.

[0015] Preferably, the sensing element is a Hall sensor, and the triggering element is a magnetic element.

[0016] Preferably, the electric tool also includes a main body, the driving component is accommodated in the main body, the first output part and the second output part are respectively arranged at opposite ends of the main body, the first output part and the second output part are respectively located at two ends of the driving component, and the first output part and the second output part are respectively located on both sides of the switching component.

[0017] Preferably, the main body includes a main body shell, and the switching component includes a switching button operated by a user and a connecting component connected to the switching button: the switching button is arranged on the main body shell, and the user operates the switching button to switch the switching component between the first position and the second position; the connecting component is accommodated in the main body shell, and the switching button drives the connecting component to move, so that the driving component is selectively connected to the first output part or the second output part through the connecting component.

[0018] Preferably, the switch button is a sliding member, and the first trigger member and the second trigger member are respectively arranged at two ends of the switch button.

[0019] Preferably, the power tool also includes a gripping portion connected to the main body and arranged at an angle relative to the main body; the first control component includes a first start-stop switch operated by the user to control the start and stop of the drive component, and the first start-stop switch is arranged on the gripping portion; the second control component includes a second start-stop switch operated by the user to control the start and stop of the drive component, and the second start-stop switch is arranged on the main body.

[0020] Preferably, the triggering member includes a first magnetic member corresponding to the first output part and a second magnetic member corresponding to the second output part, the first magnetic member and the second magnetic member are opposite, and the sensing member is a Hall sensor, which is used to sense the magnetic field strength and magnetic field polarity of the first magnetic member or the magnetic field strength and magnetic field polarity of the second magnetic member, and generate a corresponding sensing signal.

[0021] Preferably, the electric tool includes a main body, and the drive assembly is accommodated in the main body; the switching assembly is rotatably arranged at one end of the main body, and the first output part and the second output part are fixedly arranged on the switching assembly and are located on the same side of the switching assembly; the switching assembly rotates under user operation to switch between the first position and the second position, so that the drive assembly is selectively connected to the first output part or the second output part.

[0022] The present invention also provides a control method applied to the above-mentioned power tool, and its technical solution is: identifying the working mode of the power tool; when it is identified that the power tool is in the first working mode, controlling the first control component to be in an effective state; when it is identified that the power tool is in the second working mode, controlling the first control component to be in an invalid state.

[0023] Compared with the prior art, the present invention has the following beneficial effects: the electric tool and its control scheme provided by the present invention identify the working mode of the tool through the control unit, making the control components that are not in the current working mode invalid, avoiding the control components from being accidentally triggered by the user, avoiding the possible confusion and poor effect of the multi-functional control of multiple working tools, and avoiding the possible safety problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0025] Figure 1 is a schematic diagram of the overall structure of the electric tool according to the first embodiment of the present invention;

[0026] Figure 2 yes Figure 1 a top view of the illustrated power tool;

[0027] Figure 3 yes Figure 1 a bottom view of the illustrated power tool;

[0028] Figure 4 yes Figure 1 A schematic diagram of the power tool shown is in a first usage state;

[0029] Figure 5 yes Figure 1 A schematic diagram of a double-ended power tool in a second use state;

[0030] Figure 6 yes Figure 1 The schematic diagram of the internal structure of the double-headed power tool with half of the shell removed;

[0031] Figure 7 yes Figure 1 A schematic diagram of an exploded view of a double-ended power tool;

[0032] Figure 8 yes Figure 7 A schematic diagram of a portion of the structure of the power tool shown;

[0033] Figure 9 yes Figure 6 The schematic diagram of the structure of the switch button in the double-head power tool shown;

[0034] Figure 10 yes Figure 9 A schematic structural diagram of the switch button from another angle;

[0035] Figure 11 yes Figure 6 The structural diagram of the connecting plate in the double-ended electric tool shown;

[0036] Figure 12is a control principle diagram of the electric tool of the present invention;

[0037] Figure 13 This is a schematic diagram of the structure of the power tool of the present invention for switching working modes;

[0038] Figure 14 yes Figure 1 The schematic diagram of the structure of the identification unit of the electric tool is shown.

[0039] Figure 15 yes Figure 1 Schematic diagram of the control method of the power tool shown. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0041] See Figures 12 to 13 The present invention provides an electric tool 100 with multiple output parts / working heads, including a drive component 4, a first output part 1, a second output part 2, a user-operated switching component 8, an identification unit 5, a control unit 6 and a user-triggered control component.

[0042] The driving assembly 4 provides driving force for driving the first output part 1 and the second output part 2. The driving assembly 4 is a motor, or a hydraulic motor, a pneumatic motor or other driving means.

[0043] The first output unit 1 and the second output unit 2 have different functions, each performing one of the following: fastening, cutting, polishing, grinding, and drilling. The power tool 100 includes a first working head 300 and a second working head 400 of different types. The first working head 300 is mounted to the first output unit 1, and the second working head 400 is mounted to the second output unit 2. The corresponding working heads, each performing a corresponding function, are mounted to the output unit and driven by the output unit to operate on a workpiece.

[0044] The switching assembly moves to different positions under user operation, including a first position and a second position, so that the switching assembly can switch between the first position and the second position. When the switching assembly is in the first position, the driving assembly 4 is connected to the first output unit 1 and disconnected from the second output unit 2, and the power tool 100 is in a first operating mode. When the switching assembly is in the second position, the driving assembly 4 is disconnected from the first output unit 1 and connected to the second output unit 2, and the power tool 100 is in a second operating mode. The user can switch the operating mode by operating the switching assembly, so that the power tool 100 is in one of the first and second operating modes. In the first operating mode, when the driving assembly 4 is operating, the driving assembly 4 can only drive the first output unit 1 connected thereto to move and operate, and the driving assembly 4 and the second output unit 2 are mechanically disconnected, so that the second output unit 2 cannot be driven. In the second operating mode, when the driving assembly 4 is operating, it can only drive the second output unit 2 connected thereto to move and operate, and the driving assembly 4 and the first output unit 1 are mechanically disconnected, so that the first output unit 1 cannot be driven. The user selects an operating mode of the multi-head electric tool 100 by switching the components and selects an operative output unit.

[0045] The control unit 6 controls the operating state of the drive assembly 4, such as the start, stop, speed, direction, etc. of the drive assembly 4. The control unit 6 includes a controller.

[0046] The control assembly is connected to the control unit 6. When the user triggers the control assembly, the control assembly transmits a signal to the control unit 6, which in turn controls the operating state of the drive assembly 4. Thus, the control unit 6 can change the motion state of the drive assembly 4 according to the user's needs, thereby controlling the operation of the first output unit 1 and the second output unit 2. The control assembly includes, but is not limited to, a start / stop switch, a speed setting button, and a torque setting button. As is well known to those skilled in the art, the control unit 6 includes a storage unit storing a control program, and the control unit 6 can also automatically control the operating state of the drive assembly 4 according to the control program.

[0047] The recognition unit 5 is connected to the control unit 6 , and the control unit 6 identifies the position of the switching component according to the recognition unit 5 to identify the working mode of the power tool 100 .

[0048] In one embodiment, the control component includes a first control component 31 triggered by the user, and the control unit 6 is connected to the first control component 31; when the control unit 6 recognizes that the power tool 100 is in the first working mode, the control unit 6 controls the first control component 31 to be in an effective state, and the control unit 6 controls the working state of the first output part 1 according to the signal input by the first control component 31; when the control unit 6 recognizes that the power tool 100 is in the second working mode, the control unit 6 controls the first control component 31 to be in an invalid state.

[0049] In another embodiment, the control assembly includes a user-triggered first control assembly 31 and a user-triggered second control assembly 32, and a control unit 6 is connected to the first control assembly 31 and the second control assembly. When the control unit 6 recognizes that the power tool 100 is in the first operating mode, the control unit 6 controls the first control assembly 31 to be in an active state and the second control assembly 32 to be in an inactive state, and the control unit 6 controls the operating state of the first output unit 1 based on the signal input from the first control assembly 31. When the control unit 6 recognizes that the power tool 100 is in the second operating mode, the control unit 6 controls the first control assembly 31 to be in an inactive state and the second control assembly 32 to be in an active state, and the control unit 6 controls the operating state of the second output unit 2 based on the signal input from the second control assembly 32.

[0050] When the control unit 6 controls a certain control component in an effective state, it means that the control unit 6 will obtain the signal transmitted by it and perform corresponding control; when the control unit 6 controls a certain control component in an invalid state, it means that the controller does not obtain the signal transmitted by it, or does not perform corresponding control, and the user's triggering has no effect on the power tool 100.

[0051] The power tool 100 of the present invention uses a software method so that when a user selects a certain working mode / output unit, the control components corresponding to the other working modes / output units are disabled, thereby preventing the control components from being accidentally triggered, thereby avoiding the following possible causes:

[0052] 1. Problems with chaotic functional control and poor performance of the output unit. For example, when the first working head 300 is operating at a slow speed for drilling, the first control component 31 is a speed setting switch that sets the output speed of the first output unit 1 to 200 rpm. When the second output unit 2 is operating at a high speed of grinding at 5K rpm, the second control component 32 is a speed setting switch that sets the output speed of the second output unit 2 to 5K rpm. When the user switches the power tool 100 to the second working mode and the user mistakenly triggers the first control component 31, the second output unit 2 will grind at a low speed, resulting in chaotic functional control and low efficiency. The user may believe that the tool is broken. Conversely, when the user switches the power tool 100 to the first working mode and the user mistakenly triggers the second control component 32, the first output unit 1 will drill at a high speed, resulting in chaotic functional control, damage to the work surface, and out-of-control speed. The user may also believe that the tool is broken.

[0053] 2. Safety Issues. For example, if the first control component 31 and the second control component 32 are start-stop switches and a user intends to use the first output unit 1 but mistakenly switches the power tool 100 to the second operating mode, the user triggers the first control component 31 (i.e., mistakenly triggers a control component that does not correspond to the current operating mode of the power tool 100), causing the second output unit 2 to mistakenly activate. Since the user intended to use the first output unit 1 and was not aware of whether the second output unit 2 was in a safe position, the mistaken activation of the second output unit 2 could damage workpieces or other items at best, or even cause personal injury.

[0054] The above software solution ensures that the multiple working modes of the power tool 100 with multiple working heads / output parts do not interfere with each other, and has stable performance and high safety.

[0055] Furthermore, the first control component 31 includes a first start-stop switch operated by the user for controlling the start and stop of the drive component 4; the second control component 32 includes a second start switch operated by the user for controlling the start and stop of the drive component 4. Thus, the present invention correspondingly avoids the safety issues caused by the aforementioned mis-activation of the control components.

[0056] Furthermore, the first control component 31 includes a first parameter setting element operated by the user for controlling the operating parameters of the drive component 4; the second control component 32 includes a second parameter setting element operated by the user for controlling the operating parameters of the drive component 4. The operating parameters include at least one of direction, speed, current, voltage, and torque. Thus, the present invention avoids the aforementioned issues of chaotic control of the output unit's functions and poor performance caused by erroneous triggering of the control component.

[0057] The switch assembly also has a third position. When the switch assembly is in the third position, the drive assembly 4 is disconnected from the first output unit 1 and the second output unit 2. When the control unit 6 recognizes that the switch assembly is in the third position, it controls the first control unit 31 and the second control unit 32 to be in an inactive state. When the user operates the switch assembly, there may be deviations, resulting in the switch assembly not being in the first or second position, and the drive assembly 4 being mechanically disconnected from any output unit. If the control unit is triggered at this time, the drive assembly 4 will start and idle, and none of the output units will operate. The user will only hear the sound of the drive assembly 4 operating, which not only wastes energy but also may mistakenly believe that the tool is damaged. Therefore, the positions of the switch assembly include an active position and an inactive position corresponding to the active position. The active position is when the drive assembly 4 is connected to an output unit, such as the first and second positions described above. The inactive position is when the drive assembly 4 is disconnected from all output units (an inactive position). When the switching component is in the disabled position, i.e., the third position, all control components are in a disabled state and cannot be triggered by mistake, thereby avoiding idling of the power tool 100, saving energy, and improving user experience.

[0058] Furthermore, the power tool 100 includes a warning light. The warning light is connected to the control unit 6. When the control unit 6 recognizes that the switch assembly is in the third position, the warning light is activated to alert the user that the switch assembly has not been fully operated and is in the inoperative position. The warning light may operate in various ways, such as flashing or changing color.

[0059] When the power tool 100 is in different operating modes, the control unit 6 sends corresponding control signals to the drive assembly 4. As is well known to those skilled in the art, the control unit 6 includes a storage unit that stores a control program containing preset parameters. The control unit 6 can also automatically control the operating state of the drive assembly 4 based on the control program. Accordingly, the present invention provides a first control program and a second control program corresponding to different output components. When the power tool 100 is in a certain operating mode, the control unit 6 invokes the corresponding control program to control the drive assembly 4 to operate according to the preset parameters.

[0060] In one embodiment, the first working mode is a screwdriver mode executed by the first output unit 1, and the second working mode is an electric grinder mode executed by the second output unit 2. In other embodiments, there are other combinations, which will not be described in detail and fall within the scope of protection of the present invention.

[0061] Furthermore, the identification unit 5 includes a trigger and a sensing member, and the trigger is arranged on the switching component; the sensing member and the trigger move relative to each other, and are used to sense the trigger and generate a sensing signal; the control unit 6 is connected to the sensing member, receives the sensing signal, and identifies the position of the switching component according to the sensing signal.

[0062] See also Figure 15 , is a control method of the above-mentioned electric tool 100:

[0063] S1: Identify the working mode of the power tool 100;

[0064] S21: When it is recognized that the power tool 100 is in the first working mode, the first control component 31 is controlled to be in an effective state;

[0065] S22: When it is identified that the electric tool 100 is in the second working mode, the first control component 31 is controlled to be in a disabled state.

[0066] The above control method can be applied to all electric tools 100 with multiple working heads to achieve the technical effects of non-interference of the multiple working modes, stable performance and high safety, which will not be elaborated here.

[0067] See Figures 1-11 , the specific technical solution of the present invention is introduced in detail with the first embodiment:

[0068] See also Figures 1 to 5 As shown, the first embodiment of the present invention relates to a double-headed power tool 100, which includes a housing, a driving component 4 accommodated in the housing, a first output part 1 connected to one end of the driving component 4, a second output part 2 connected to the other end of the driving component 4, a trigger 311 installed on the housing and a battery pack 200 connected to the housing. The battery pack 200 supplies power to the driving component 4 to drive the first output part 1 and the second output part 2 to operate. The battery pack 200 is a lithium battery pack that can be cyclically charged.

[0069] In this embodiment, on the one hand, the housing includes two symmetrically arranged and inwardly concave half shells, which cover each other to form an internal space, and the drive assembly 4 and the battery pack 200 can be assembled into the internal space in a simple manner.

[0070] On the other hand, the housing includes a main body 101 extending in a front-to-back direction and having a generally cylindrical shape, and a grip portion 102 arranged at an angle relative to the main body 101. The drive assembly 4 is housed within the main body 101. The first output portion 1 and the second output portion 2 both extend to the outside of the main body 101, with the first output portion 1 located at the front side of the main body 101 and the second output portion 2 located at the rear side of the main body 101. In other words, the first output portion 1 and the second output portion 2 are located at opposite ends of the main body 101, and the first output portion 1 and the second output portion 2 are respectively located at opposite ends of the drive assembly 4. Furthermore, a first working head 300 is mounted on the first output portion 1, and a second working head 400 is mounted on the second output portion 2. The first working head 300 and the second working head 400 are different from each other, enabling the double-headed power tool 100 to simultaneously output two different operating modes. The user only needs one tool to meet two usage needs, which greatly improves the user's product experience; integrating the two tools into one product also reduces the storage space required by the user; and the two output parts are located at opposite ends of the main body 101, so that the first output part 1 and the second output part 2 are separated, and the two do not interfere with each other when working, which is highly safe.

[0071] Furthermore, the axis of the first output part 1 and the axis of the second output part 2 are parallel to or coincide with each other.

[0072] Furthermore, the angle between the axis of the grip portion 102 and the axis of the first output portion 1 is not less than the angle between the axis of the grip portion 102 and the axis of the second output portion 2. That is, the axis of the grip portion 102 and the axis of the first output portion 1 are perpendicular or inclined.

[0073] The trigger 311 and the battery pack 200 are both installed on the grip 102, and the battery pack 200 is installed inside the grip 102 to reduce the volume of the double-headed power tool 100, making the entire machine more compact and easy to operate; correspondingly, the grip 102 is provided with a charging port 201 for charging the battery pack 200, and the battery pack 200 is charged through the charging port 201. The charging port 201 is located at the bottom of the grip 102 away from the main body 101, making the appearance of the entire machine more neat.

[0074] Please combine Figure 4 and Figure 5 As shown, two user operation modes are provided, corresponding to the manipulation of different output units. The double-headed power tool 100 includes a user-touchable pressing area 108, which is located on the grip 102 and the side of the main body 101 near the second output unit 2. The trigger 311 is located on the side of the grip 102 facing the first output unit 1, that is, the trigger 311 and the pressing area 108 are located on opposite sides of the grip 102.

[0075] See also Figure 4 The first operating mode is shown in FIG. A first working head 300 is mounted on the first output portion 1 . The first output portion 1 is a screwdriver output portion, and the first working head 300 is a screwdriver head. The first operating mode of the power tool 100 is the screwdriver mode. The first working head 300 is plugged into the first output portion 1 and performs tightening operations under the action of the drive assembly 4 . In this case, the user grasps the grip portion 102 and presses the trigger 311 thereon to begin tightening.

[0076] See also Figure 5 The second operating mode is shown in FIG. A second working head 400 is mounted on the second output portion 2. The second output portion 2 is an electric grinding output portion, and the second working head 400 is an electric grinding head. The second operating mode of the power tool 100 is the electric grinding mode. The second working head 400 is plugged into the second output portion 2 and performs the grinding operation under the control of the drive assembly 4. In this case, the user grasps the grip portion 102 with their index finger and thumb pressed against the pressing area 108, thereby firmly controlling the entire double-headed power tool 100.

[0077] It is common knowledge among those skilled in the art that, depending on the working conditions, the torque outputted by the first output portion 1 of the screwdriver is greater than the torque outputted by the second output portion 2 of the electric grinder. The speed outputted by the first output portion 1 of the screwdriver is lower than the speed outputted by the second output portion 2 of the electric grinder.

[0078] It is understandable that, since the main body 101 is extended in a longitudinal shape and has an area for the user's palm to grasp, the user can also perform operations by directly grasping the main body 101 instead of the gripping portion 102 .

[0079] In this embodiment, in the front-to-back direction of the main body 101, the distance between the axis of the grip 102 and the end of the first output portion 1 is greater than the distance between the axis of the grip 102 and the end of the second output portion 2. That is, the grip 102 is located on the side of the main body 101 away from the first output portion 1 and closer to the second output portion 2. Because the first output portion 1 is a screwdriver, it is subject to significant wobbling during operation. Positioning the grip 102 away from the first output portion 1 improves tool balance, making operation more comfortable, less tiring, and convenient for use in narrow spaces. The second output portion 2 is an electric grinder, and the grip 102 is positioned closer to the second output portion 2, facilitating fine grinding operations.

[0080] See also Figures 6 to 8As shown, the drive assembly 4 is a motor housed within the main body 101. The power tool 100 further includes a first transmission assembly 10 connected between the motor and the first output unit 1, a second transmission assembly 20 connected between the motor and the second output unit 2, and a switching assembly 8 connecting the first transmission assembly 10 and the second transmission assembly 20. The first transmission assembly 10 and the second transmission assembly 20 are located at opposite ends of the motor, and the first output unit 1 and the second output unit 2 are located on opposite sides of the switching assembly 8. The switching assembly 8 is used to control the motor to selectively drive the first output unit 1 via the first transmission assembly 10 or the second output unit 2 via the second transmission assembly 20. In other words, the double-headed power tool 100 has a first operating mode and a second operating mode for user operation. In the first operating mode (screwdriver mode), the first output unit 1 operates while the second output unit 2 does not operate. In the second operating mode (grinding mode), the second output unit 2 operates while the first output unit 1 does not operate. The user manipulates the switching assembly 8 to switch between the first and second operating modes. By providing a switching assembly 8 between the first transmission assembly 10 and the second transmission assembly 20, when using the double-headed power tool 100, only one of the first output part 1 and the second output part 2 can be used for operation, which greatly improves the safety of the user. Figure 12-13 As shown, the above-mentioned double-headed power tool 100 includes a control system, which controls the operation of the power tool 100. The control system is connected to the control unit 6 of the drive component 4 and the control component connected to the control unit 6. The control unit 6 is arranged on the circuit board 9, and the circuit board 9 is placed in the gripping part 102. The control component is arranged on the outside of the casing and can be triggered by manual operation of the user, thereby transmitting the input signal to the control unit 6, and the control unit 6 controls the operating state of the motor according to the signal.

[0081] The control component includes a first control component 31 for the first output part 1 and a second control component 32 for the second output part 2. The first control component 31 includes a forward button 312, a reverse button 313 and the above-mentioned trigger 311, and the second control component 32 includes an electric grinding button 321, all of which are connected to the control unit 6.

[0082] The forward button 312 sets forward rotation and adjusts the speed in three gears. Pressing it once sets the motor to forward rotation. Pressing it multiple times switches the motor speed between low forward speed, medium forward speed, and high forward speed—three gears. The reverse button 313 sets reverse rotation and full speed. Pressing it once sets the motor to reverse rotation and full speed. The trigger 311 serves as the first start / stop switch in screwdriver mode. The first parameter setting element includes the forward button 312 and reverse button 313.

[0083] The electric grinder button 321 functions as a start / stop switch and a three-speed adjustment knob. Pressing it multiple times switches the motor between low-speed start, medium-speed start, high-speed start, and off—four speeds. In other words, the second start / stop switch and second parameter setting element are integrated into the electric grinder button 321, a single user-operated trigger.

[0084] The trigger 311 is provided on the housing of the grip portion 102. The main body 101 of the power tool 100 includes a main housing, which is provided with a t109. The forward button 312, the reverse button 313 and the electric grinding button 321 are located in the user operation area 109.

[0085] refer to Figure 4-5 The above two operations correspond to the manipulation of different output parts respectively. Since the trigger 311 is located at the gripping part 102, in the second operation mode, the trigger 311 used in the first working mode will inevitably be pressed.

[0086] The electric module also includes an indicator module, which includes a screwdriver forward indicator light, a screwdriver reverse indicator light, an electric grinder indicator light, and a gear indicator light 71. Each of the screwdriver forward indicator light, the screwdriver reverse indicator light, and the electric grinder indicator light is a single LED, located above the forward button 312, the reverse button 313, and the electric grinder button 321, respectively. These indicators illuminate when the forward button 312, the reverse button 313, and the electric grinder button 321 are activated. The gear indicator light 71 includes three LEDs. The main housing also includes an indicator area. The three gear indicators 71 are arranged in parallel in the front-to-back direction within the indicator area to indicate the motor speed gear in screwdriver mode and electric grinder mode. For example, in screwdriver mode, the gear indicator lights 71 illuminate for low-speed forward, medium-speed forward, and high-speed forward, respectively. In screwdriver mode, the gear indicator lights 71 illuminate for full reverse speed, respectively. In electric grinder mode, the gear indicator lights 71 illuminate for low-speed start, medium-speed start, and high-speed start, respectively.

[0087] The power tool 100 also includes the aforementioned identification unit 5. Specifically, the triggering member of the identification unit 5 includes a first triggering member 511 corresponding to the first output portion 1 and a second triggering member 512 corresponding to the second output portion 2. The sensing member of the identification unit 5 includes a first sensing member 521 corresponding to the first output portion 1 and a second sensing member 522 corresponding to the second output portion 2. When the switching assembly is in the first position, the first triggering member 511 triggers the first sensing member 521, while the second sensing member 522 is not triggered. The control unit 6 receives a first sensing signal from the first sensing member 521, thereby recognizing that the switching assembly is in the first position. When the switching assembly is in the second position, the second triggering member 512 triggers the second sensing member 522, while the first sensing member 521 is not triggered. The control unit 6 receives a second sensing signal from the second sensing member 522, thereby recognizing that the switching assembly is in the second position.

[0088] The switching assembly 8 includes a switching button 81 operated by the user and a connecting assembly connected to the switching button 81. The switching button 81 is set on the main shell. The user operates the switching button 81 to switch the switching assembly between the first position and the second position. The connecting assembly is accommodated in the main shell. The switching button 81 drives the connecting assembly to move so that the driving assembly 4 is selectively connected to the first output part 1 or the second output part 2 through the connecting assembly.

[0089] For details, see Figure 9-10 The switch button 81 is a sliding member, and a corresponding groove 103 is provided on the main housing. When the user toggles the slider, it slides left and right within the groove 103. A first triggering member 511 and a second triggering member 512 are respectively provided at opposite ends of the switch button 81. As the switch button 81 moves synchronously, a first sensor 521 and a second sensor 522 are provided on the inner side of the main housing. When the switch button 81 slides to the leftmost end, the switch assembly is in the first position, triggering the first sensor 521. When the switch button 81 slides to the rightmost end, the switch assembly is in the second position, triggering the second sensor 522. If the switch button 81 slides but is not in the first position but in the second position, it is in the third position, and neither the first sensor 521 nor the second sensor 522 is triggered, and the power tool 100 is in the non-operating mode. In other words, only one of the first sensor 521 and the second sensor 522 is triggered, and the control unit 6 can only receive one of the first sensing signal and the second sensing signal, thereby identifying whether the power tool 100 is in the first operating mode or the second operating mode.

[0090] In this embodiment, the sensing element is a Hall sensor, and the triggering element is a magnetic element.

[0091] The control system of power tool 100 also includes a power-on self-locking circuit for the power module (battery pack). When the tool is not used for an extended period, the power-on self-locking circuit automatically powers down, switching the battery pack's external power supply, thereby also disconnecting power from control unit 6 and eliminating power consumption, thus conserving energy. When the user triggers a switch, the power-on self-locking circuit is activated, and the power system can resume power to control unit 6 and lock the power supply until it is automatically powered down again after a period of inactivity. As will be understood by those skilled in the art, the power-on self-locking circuit of the power module of power tool 100 is publicly available and will not be described in detail here.

[0092] Furthermore, when the tool is in a non-power-consuming state, the user triggers any one of the trigger 311, forward button 312, reverse button 313, and electric grinder button 321 to activate the power-on self-locking circuit, allowing the control unit 6 to obtain power and operate. At this time, the control unit 6 first detects the identification unit 5 to identify the operating mode of the power tool 100. When it is identified that the power tool 100 is in the first operating mode, the control unit 6 controls the trigger 311, forward button 312, and reverse button 313 to be in an effective state, and controls the electric grinder button 321 to be in an ineffective state. When it is identified that the power tool 100 is in the second operating mode, the control unit 6 controls the trigger 311, forward button 312, and reverse button 313 to be in an ineffective state, and controls the electric grinder button 321 to be in an effective state. When it is identified that the power tool 100 is not in the non-operating mode, the control unit 6 controls the trigger 311, forward button 312, reverse button 313, and electric grinder button 321 to be in an ineffective state. The effective state and the ineffective state are the same as described above and will not be repeated here.

[0093] This ensures that the first control component 31 is only used in the first working mode and the second control component 32 is only used in the second working mode. Figure 5 In the electric grinder mode, the trigger 311 is triggered, causing the electric grinder to start by mistake. Secondly, it avoids the problem that the direction and speed of the screwdriver mode are confused with the direction and speed of the electric grinder mode, which leads to the control confusion and poor effect of the output function. Thirdly, similar to the above safety issues, see the details. Figure 4 In the working condition, when the user wants to use the screwdriver, as in the first operation mode, the user holds the grip portion 102 of the tool, the screwdriver is ahead, and the electric grinder is close to the shoulder or jaw of the human body, but the user mistakenly puts the switch to the second position. At this time, the trigger 311 is pressed, and the electric grinder is mistakenly triggered to rotate, and the electric grinder may injure the human body.

[0094] The structure of the switching component of the first embodiment will be described in detail below.

[0095] See also Figures 6 to 8 As shown, the above-mentioned motor includes a first motor shaft 41 extending toward the first transmission component 10 side and a second motor shaft 42 extending toward the second transmission component 20 side, both of which output the rotational power of the motor. The first transmission component 10 includes a first transmission part 11 connected to the first output part 1 and a first clutch 12 movably connecting the first motor shaft 41 and the first transmission part 11. The second transmission component 20 includes a second transmission part 21 connected to the second output part 2 and a second clutch 22 movably connecting the second motor shaft 42 and the second transmission part 21. The switching component 8 is connected between the first clutch 12 and the second clutch 22.

[0096] In this embodiment, the above-mentioned switching assembly 8 includes a switching button 81 installed on the main body 101 and a connecting assembly connected to the switching button 81. The connecting assembly includes a connecting plate 82 connected between the first transmission assembly 10 and the second transmission assembly 20, a first connecting member 83 connecting the first clutch 12 and the switching button 81, a second connecting member 84 connecting the switching button 81 and the connecting plate 82, a third connecting member 85 connecting the connecting plate 82 and the second clutch 22, and a fourth connecting member 86 connecting the first transmission part 11 and the switching button 81. Moving the switching button 81 drives the connecting plate 82, the first connecting member 83, the second connecting member 84, the third connecting member 85 and the fourth connecting member 86 to move together to switch the positions of the first clutch 12 and the second clutch 22.

[0097] Alternatively, the first connecting member 83 may also be connected between the first clutch member 12 and the connecting plate 82 , and the movement of the switch button 81 may also drive the first clutch member 12 to move.

[0098] In this embodiment, the first connecting member 83 , the second connecting member 84 , the third connecting member 85 and the fourth connecting member 86 are all steel wires.

[0099] See also Figure 7 and Figure 8 As shown, the above-mentioned double-headed power tool 100 has a first working mode for driving the first output part 1 to work and a second working mode for driving the second output part 2 to work. In the first working mode, the first transmission part 11 is connected to the first motor shaft 41 via the first clutch 12, and the second transmission part 21 and the second motor shaft 42 are disengaged; in the second working mode, the second transmission part 21 is connected to the second motor shaft 42 via the second clutch 22, and the first transmission part 11 and the first motor shaft 41 are disengaged.

[0100] In this embodiment, the above-mentioned first clutch member 12 includes a first groove 121 that is radially recessed from the outer periphery, and the second clutch member 22 includes a second groove 221 that is radially recessed from the outer periphery. One end of the first connecting member 83 is connected to the connecting plate 82 or the switching button 81, and the other end is clamped in the first groove 121; one end of the third connecting member 85 is connected to the connecting plate 82, and the other end is clamped in the second groove 221.

[0101] See also Figure 8 As shown, the switch button 81 includes shoulders 811 on the left and right sides, a toggle portion 812 on the upper side of the shoulder 811, and a first groove 813, a second groove 814 and a third groove 815 on the lower side of the shoulder 811. The toggle portion 812 protrudes out of the main body 101 to facilitate user operation; the second connecting member 84 is placed in the first groove 813, the first connecting member 83 is placed in the third groove 815, and the fourth connecting member 86 is placed in the second groove 814.

[0102] The double-headed power tool 100 includes a slide groove 103 extending from the inner wall of the main body 101 . The switch button 81 is received in the slide groove 103 , and the shoulder 811 reciprocates in the slide groove 103 .

[0103] In this embodiment, the fourth connecting member 86 is located between the first connecting member 83 and the second connecting member 84 , and the fourth connecting member 86 is biased toward the switching button 81 to prevent the switching button 81 from shaking during operation.

[0104] See also Figures 6-11 As shown, the first transmission portion 11 includes a connecting post 111 that protrudes radially outward from the outer periphery, and the second connecting member 84 includes an annular portion 841 that is sleeved on the connecting post 111. Furthermore, the switching button 81 and the connecting plate 82 are located on opposite sides of the motor, and the annular portion 841 is located approximately midway between the switching button 81 and the connecting plate 82. When the switching button 81 moves in the front-to-back direction, it drives the second connecting member 84 to pivot about the annular portion 841, thereby driving the connecting plate 82 to move in the front-to-back direction.

[0105] Please combine Figure 11 As shown, the above-mentioned connecting plate 82 includes a base plate 823 extending along the axial direction of the motor, a first end 821 close to the first transmission component 10, a second end 822 close to the second transmission component 20, a guide seat 827 protruding from the first end 821 toward the first transmission component 10, a second bayonet 824 extending from the second end 822 toward the second transmission component 20, and a first bayonet 828 provided on the side of the guide seat 827. The base plate 823 is connected between the first end 821 and the second end 822, the second connecting member 84 is clamped in the first bayonet 828, and the third connecting member 85 is installed in the second bayonet 824.

[0106] Furthermore, the above-mentioned double-headed power tool 100 includes receiving parts 104, 105 extending from the inner wall of the main body 101, and the base plate 823 is supported on the receiving parts 104, 105 and moves along the receiving parts 104, 105; the end face of the guide seat 827 facing the first transmission component 10 is provided with a guide surface 825, and the shape of the guide surface 825 is matched with the outer peripheral surface of the first transmission component 10 to limit and guide the forward and backward movement of the connecting plate 82.

[0107] Furthermore, the guide seat 827 also includes a recess 826 recessed inward from the upper end surface of the guide surface 825. The recess 826 removes part of the material of the guide seat 827, thereby reducing the material cost of the connecting plate 82 and making the connecting plate 82 lighter, making it easier for users to switch working modes.

[0108] Please combine Figure 7 and Figure 8As shown, in this embodiment, the first output part 1 is a screwdriver, and the corresponding first transmission part 11 is a planetary gear transmission structure; the second output part 2 is an electric grinder, and the corresponding second transmission part 21 is an electric grinder output shaft; the drive assembly 4 also includes a shaft lock structure 130 connected to the second transmission part 21. Pressing the shaft lock structure 130 prevents the electric grinder output shaft from rotating, thereby facilitating the user to replace the electric grinder head.

[0109] In this embodiment, the above-mentioned casing also includes an air inlet 140 and an air outlet 150 connected to the internal space. The drive component 4 includes a fan connected to the motor. Under the action of the fan, the external cooling air enters the internal space through the air inlet 140, dissipates the heat of the drive component 4, and is then discharged outward from the air outlet 150.

[0110] Those skilled in the art will appreciate that the structure of the switching component is not limited to that in this embodiment, and other switching components that can implement working mode switching fall within the scope of protection of the present invention and are not listed here. Example

[0111] The double-headed electric tool 100 of the second embodiment of the present invention includes an identification unit 5, which includes a trigger and a sensing member. The trigger includes a first magnetic member corresponding to the first output part 1 and a second magnetic member corresponding to the second output part 2. The first magnetic member and the second magnetic member are opposite. The sensing member is a Hall sensor, which is used to sense the magnetic field strength and polarity of the first magnetic member or the magnetic field strength and polarity of the second magnetic member, and generate a corresponding sensing signal. When the Hall sensor senses a magnetic field and the direction of the magnetic field is positive, it sends a first sensing signal. When the Hall sensor senses a magnetic field and the direction of the magnetic field is negative, it sends a second sensing signal. The control unit 6 identifies whether the switching component is in the first position or the second position based on the received sensing signal, thereby identifying the electric working mode.

[0112] Those skilled in the art will appreciate that the structure of the switching component is not limited to the two embodiments of the present invention, and other identification units 5 that can implement the identification function fall within the protection scope of the present invention and are not listed here.

[0113] The driving component 4 of the second embodiment is housed in the main body 101; the switching component is rotatably disposed at one end of the main body 101, and the first output portion 1 and the second output portion 2 are fixedly disposed on the switching component and are located on the same side of the switching component; the switching component rotates under user operation to switch between the first position and the second position, so that the driving component 4 is selectively connected to the first output portion 1 or the second output portion 2.

[0114] In the second embodiment, there is only one transmission assembly, the motor output shaft of the motor is connected to the transmission assembly, the transmission assembly has an output end, the first output part 1 has a first input end, the second output part 2 includes a second input end, and the switching assembly is a rotating body. The user rotates the rotating body so that one of the first input end and the second input end is connected to the output end of the transmission assembly, and thus to the drive assembly 4.

[0115] The double-headed power tool 100 of the second embodiment of the present invention is different from the first embodiment in overall shape. The specific structures of the switching component, motor output shaft, transmission component and dual output part are different from those of the first embodiment. The identification unit 5 is different from that of the first embodiment. The remaining parts are the same and will not be repeated.

[0116] The present invention is not limited to the above-described specific embodiments. Those skilled in the art will readily appreciate that many alternatives to the power tool 100 of the present invention exist without departing from the principles and scope of the present invention. The scope of protection of the present invention shall be determined by the claims.

Claims

1. An electric tool, characterized in that: include: a drive assembly, a first output, a second output, and a user-operated switching assembly, an identification unit, a control unit, and a user-triggered control assembly; The driving assembly provides driving force for driving the first output part and the second output part to work; The switching component moves under user operation to switch between the first position and the second position; When the switching assembly is in the first position, the driving assembly and the first output part are connected, the driving assembly and the second output part are disconnected, and the power tool is in a first working mode; when the switching assembly is in the second position, the driving assembly and the first output part are disconnected, the driving assembly and the second output part are connected, and the power tool is in a second working mode; The identification unit is connected to the control unit, and includes a trigger and a sensing member. The trigger is provided on the switching assembly, and the sensing member is used to sense the trigger and generate a sensing signal. The sensing member is connected to the control unit, and the control unit identifies the position of the switching assembly according to the sensing signal to identify the working mode of the power tool. The control assembly includes a first control assembly, and the control unit is connected to the first control assembly; when the control unit recognizes that the power tool is in a first working mode, the control unit controls the first control assembly to be in an effective state, and the control unit controls the working state of the first output part according to the signal input by the first control assembly; When the control unit recognizes that the power tool is in the second working mode, the control unit controls the first control component to be in an invalid state, and the first control component being in the invalid state includes that the control unit does not obtain the signal input by the first control component, or the control unit does not perform control according to the signal input by the first control component.

2. The electric tool according to claim 1, wherein: The control component also includes a second control component, and the control unit is connected to the second control component; when the control unit recognizes that the power tool is in the first working mode, the control unit controls the second control component to be in an invalid state; when the control unit recognizes that the power tool is in the second working mode, the control unit controls the second control component to be in an effective state, and the control unit controls the working state of the second output part according to the signal input by the second control component.

3. The electric tool according to claim 2, wherein: The first control component includes a first start-stop switch operated by a user, which is used to control the start and stop of the drive component; the second control component includes a second start switch operated by a user, which is used to control the start and stop of the drive component.

4. The electric tool according to claim 2, wherein: The first control component includes a first parameter setting component operated by a user, which is used to control the working parameters of the drive component; the second control component includes a second parameter setting component operated by a user, which is used to control the working parameters of the drive component.

5. The electric tool according to claim 2, wherein: The switching assembly further has a third position. When the switching assembly is in the third position, the driving assembly is disconnected from the first output portion, and the driving assembly is disconnected from the second output portion. When the control unit recognizes that the switching component is located in the third position, the control unit controls the first control component and the second control component to be in a disabled state.

6. The electric tool according to claim 2, characterized in that: The sensing member and the trigger member move relative to each other to sense the trigger member and generate a sensing signal; the control unit is connected to the sensing member, receives the sensing signal, and identifies the position of the switching component according to the sensing signal.

7. The electric tool according to claim 6, wherein: The triggering member includes a first triggering member corresponding to the first output part and a second triggering member corresponding to the second output part, and the sensing member includes a first sensing member corresponding to the first output part and a second sensing member corresponding to the second output part. When the switching component is located in the first position, the first triggering member triggers the first sensing member, and the second sensing member is not triggered. The control unit receives a first sensing signal from the first sensing member, thereby recognizing that the switching component is located in the first position; when the switching component is located in the second position, the second triggering member triggers the second sensing member, and the first sensing member is not triggered. The control unit receives a second sensing signal from the second sensing member, thereby recognizing that the switching component is located in the second position.

8. The electric tool according to claim 6, wherein: The electric tool also includes a main body, the drive component is accommodated in the main body, the first output part and the second output part are respectively arranged at opposite ends of the main body, the first output part and the second output part are respectively located at two ends of the drive component, and the first output part and the second output part are respectively located on both sides of the switching component.

9. The electric tool according to claim 8, wherein: The main body includes a main housing, and the switching component includes a switching button operated by a user and a connecting component connected to the switching button. The switch button is provided on the main housing, and a user operates the switch button to switch the switch assembly between the first position and the second position; The connecting assembly is accommodated in the main body shell, and the switching button drives the connecting assembly to move, so that the driving assembly is selectively connected to the first output part or the second output part through the connecting assembly.

10. The electric tool according to claim 9, wherein: The power tool also includes a grip portion connected to the main body and arranged at an angle relative to the main body; the first control component includes a first start-stop switch operated by the user to control the start and stop of the drive component, and the first start-stop switch is arranged on the grip portion; the second control component includes a second start-stop switch operated by the user to control the start and stop of the drive component, and the second start-stop switch is arranged on the main body.

11. A control method for the electric tool according to claim 1, characterized in that: Identify the operating mode of power tools; When it is recognized that the electric tool is in the first working mode, the first control component is controlled to be in an effective state; When it is identified that the electric tool is in the second working mode, the first control component is controlled to be in a disabled state.

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