CN115741599A - Electric tool and control method thereof - Google Patents

Abstract

The present invention relates to an electric tool and a control method thereof, the electric tool including: the device comprises a driving component, a first output part, a second output part, a switching component operated by a user, an identification unit, a control unit and a first control component triggered by the user; the switching component switches one of the first output part and the second output part to be connected with the driving component, the identification component identifies the working mode of the electric tool, when the electric 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 a signal input by the first control component; when the first control assembly is in the first working mode, the control unit controls the first control assembly to be in a failure state. The electric tool has the technical effects that multiple working modes do not interfere with each other, the performance is stable, and the safety is high.

Description

Electric tool and control method thereof

[ technical field ]

The invention relates to the technical field of electric tools, in particular to an electric tool and a control method thereof.

[ background art ]

The electric tool is a machine which is driven by a motor to drive an output part to operate to work a workpiece, can realize various functions such as fastening, cutting, polishing, grinding, drilling and the like according to the difference of the types of the output parts, and meets the diversified requirements of users. When household DIY manual creation is carried out, occasions that two tools are frequently used often occur, for example, a screwdriver (for fastening operation) and an electric grinder (for grinding operation) are frequently used for processing wood, so that a user has to take the two tools back and forth, and the use is very inconvenient; the purchase of two tools undoubtedly also increases the use cost of the user; multiple tools take up more living space and are also disadvantageous to the user.

At present, an electric tool with multiple working heads appears in the market, the working heads are different in types and different in realized functions, a user can switch the working heads according to requirements, the user can realize at least two of the functions of the multiple differences by using one tool, the purchase cost is reduced, the use is convenient for the user, and the user requirements are met.

The shell of the electric tool is provided with a control component triggered by a user, such as a starting switch and a rotating speed setting key, and the controller obtains an input signal from the control component so as to control the operation of the motor. Aiming at the plurality of working heads on the electric tool, a group of independent control components triggered by a user are respectively arranged on the shell of the electric tool so as to respectively control the operation of the motor and the tool under different functions. However, the control module is easily triggered by mistake, which causes confusion and poor effect of function control and even safety problems.

[ summary of the invention ]

Aiming at the defects of the prior art, the invention provides an electric tool which comprises a driving 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, wherein the user-operated switching component is connected with the driving component; the driving assembly provides driving force for driving the first output part and the second output part to work; the switching component moves under the operation of a user so as to switch between a first position and a second position; when the switching assembly is at the first position, the driving assembly is connected with the first output part, the driving assembly is disconnected with the second output part, and the electric tool is in a first working mode; when the switching assembly is at the second position, the driving assembly is disconnected with the first output part, the driving assembly is connected with the second output part, and the electric tool is in a second working mode; the identification unit is connected with the control unit, and the control unit identifies the position of the switching component according to the identification unit so as to identify the working mode of the electric tool; the control assembly comprises a first control assembly triggered by a user, and the control unit is connected with the first control assembly; when the control unit identifies that the electric tool is in a 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 a signal input by the first control component; when the control unit identifies that the electric tool is in the second working mode, the control unit controls the first control assembly to be in a failure state.

Preferably, the control assembly comprises a second control assembly triggered by a user, and the control unit is connected with the second control assembly; when the control unit identifies that the electric tool is in a first working mode, the control unit controls the second control assembly to be in a failure state; when the control unit identifies that the electric tool is in a 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 a signal input by the second control component.

Preferably, the first control assembly comprises a first start-stop switch operated by a user and used for controlling the start and stop of the driving assembly; the second control assembly includes a user-operated second start switch for controlling the start and stop of the drive assembly.

Preferably, the first control assembly comprises a user operated first parameter setting for controlling an operating parameter of the drive assembly; the second control assembly comprises a second parameter setting piece operated by a user and used for controlling the working parameters of the driving assembly.

Preferably, the operating parameter includes at least one of steering, rotational speed, current, voltage, and torque.

Preferably, the switching assembly further includes a third position, and when the switching assembly is in the third position, the driving assembly and the first output portion are in a disconnected state, and the driving assembly and the second output portion are in a disconnected state; when the control unit identifies that the switching assembly is located at the third position, the control unit controls the first control assembly and the second control assembly to be located in a failure state.

Preferably, the control unit sends corresponding control signals to the driving assembly when the electric tool is in different working modes.

Preferably, the first operating mode is a screwdriver mode executed by the first output portion, and the second operating mode is an electric grinding mode executed by the second output portion.

Preferably, the identification unit comprises a trigger piece and a sensing piece, and the trigger piece is arranged on the switching component; the sensing piece and the trigger piece move relatively to each other and are used for sensing the trigger piece and generating a sensing signal; the control unit is connected with the sensing piece, receives the sensing signal and identifies the position of the switching component according to the sensing signal.

Preferably, the triggering element includes a first triggering element corresponding to the first output portion and a second triggering element corresponding to the second output portion, the sensing element includes a first sensing element corresponding to the first output portion and a second sensing element corresponding to the second output portion, when the switching assembly is located at the first position, the first triggering element triggers the first sensing element, the second sensing element is not triggered, and the control unit receives a first sensing signal from the first sensing element to recognize that the switching assembly is located at the first position; when the switching assembly is located at the second position, the second trigger piece triggers the second sensing piece, the first sensing piece is not triggered, and the control unit receives a second sensing signal from the second sensing piece so as to recognize that the switching assembly is located at the second position.

Preferably, the sensing piece is a hall sensor, and the triggering piece is a magnetic piece.

Preferably, the electric tool further includes a main body portion, the driving assembly is accommodated in the main body portion, the first output portion and the second output portion are respectively disposed at two opposite ends of the main body portion, the first output portion and the second output portion are respectively located at two ends of the driving assembly, and the first output portion and the second output portion are respectively located at two sides of the switching assembly.

Preferably, the main body part includes a main body housing, the switching assembly includes a switching button operated by a user and a connecting assembly connected to the switching button: the switching button is arranged on the main body shell, and a user operates the switching button to switch the switching component 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 alternatively connected with the first output part or the second output part through the connecting assembly.

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

Preferably, the electric tool further comprises a holding part connected with the main body part and arranged at an angle relative to the main body part; the first control assembly comprises a first start-stop switch operated by a user and used for controlling the start and stop of the driving assembly, and the first start-stop switch is arranged on the holding part; the second control component comprises a second start-stop switch operated by a user and used for controlling the start and stop of the driving component, and the second start-stop switch is arranged on the main body part.

Preferably, the trigger part includes with first magnetism spare that first output corresponds and with the second magnetism spare that the second output corresponds, first magnetism spare with the second magnetism spare is opposite, the response piece is hall sensor, is used for the response the magnetic field intensity and the magnetic field polarity of first magnetism spare or the magnetic field intensity and the magnetic field polarity of second magnetism spare to produce corresponding induction signal.

Preferably, the electric power tool includes a main body portion, and the drive unit is housed in the main body portion; the switching component is rotatably arranged at one end of the main body part, and the first output part and the second output part are fixedly arranged on the switching component and are positioned at the same side of the switching component; the switching component rotates under the operation of a user so as to switch between the first position and the second position, so that the driving component is alternatively connected with the first output part or the second output part.

The invention also provides a control method applied to the electric tool, and the technical scheme is as follows: identifying an operating mode of the power tool; when the electric tool is identified to be in the first working mode, controlling the first control assembly to be in an effective state; and when the electric tool is identified to be in the second working mode, controlling the first control assembly to be in a failure state.

Compared with the prior art, the invention has the following beneficial effects: according to the electric tool and the control scheme thereof, the control unit identifies the working mode of the tool, so that the control component which is not in the current working mode is invalid, the control component is prevented from being triggered by a user by mistake, the problems of disordered control and poor effect of multiple functions of multiple working tools, and the safety problem which can be caused are avoided.

[ description of the drawings ]

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:

fig. 1 is an overall configuration diagram of a power tool of a first embodiment of the present invention;

FIG. 2 is a top view of the power tool of FIG. 1;

FIG. 3 is a bottom view of the power tool of FIG. 1;

FIG. 4 is a schematic view of the power tool of FIG. 1 in a first state of use;

FIG. 5 is a schematic view of the dual-headed power tool of FIG. 1 in a second use configuration;

FIG. 6 is a schematic view of the interior of the double-ended power tool of FIG. 1 with a half shell removed;

FIG. 7 is a schematic exploded view of the dual-headed power tool of FIG. 1;

FIG. 8 is a schematic view of a portion of the power tool of FIG. 7;

FIG. 9 is a schematic view of the switch knob of the dual head power tool of FIG. 6;

FIG. 10 is a schematic view of the switch knob of FIG. 9 at another angle;

FIG. 11 is a schematic structural view of the connecting plate of the double-ended power tool of FIG. 6;

fig. 12 is a control schematic of the power tool of the present invention;

FIG. 13 is a schematic diagram of the power tool of the present invention for switching the operation modes;

fig. 14 is a schematic configuration diagram of the recognition unit of the electric power tool shown in fig. 1.

Fig. 15 is a schematic diagram of a control method of the electric power tool shown in fig. 1.

[ detailed description of the invention ]

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

Referring to fig. 12 to 13, the present invention provides a multi-output/working head power tool 100, which includes a driving assembly 4, a first output unit 1, a second output unit 2, a user-operated switching assembly 8, an identification unit 5, a control unit 6, and a user-triggered control assembly.

The driving assembly 4 provides a driving force for driving the first output part 1 and the second output part 2 to work. The driving component 4 is an electric motor, or a hydraulic motor, a pneumatic motor or other driving modes.

The first output 1 and the second output 2 differ in their function, respectively performing one of the functions including but not limited to fastening, cutting, polishing, sanding, drilling. The electric tool 100 comprises a first working head 300 and a second working head 400 which are different in type, wherein the first working head 300 is installed on a first output part 1, the second working head 400 is installed on a second output part 2, and the corresponding working heads which realize corresponding functions are installed on the output parts and driven by the output parts to operate to act on a workpiece.

The switching component moves under the operation of a user to have different positions, wherein the positions comprise a first position and a second position, so that the switching component can be switched between the first position and the second position; when the switching assembly is at the first position, the driving assembly 4 is connected with the first output part 1, the driving assembly 4 is disconnected with the second output part 2, and the electric tool 100 is in a first working mode; when the switching member is at the second position, the driving member 4 and the first output unit 1 are in a disconnected state, the driving member 4 and the second output unit 2 are in a connected state, and the electric power tool 100 is in the second operation mode. The user can switch the working mode by operating the switching component, so that the electric tool 100 is in one of a first working mode and a second working mode, in the first working mode, when the driving component 4 works, the driving component 4 can only drive the first output part 1 connected with the driving component to work in a moving way, the driving component 4 is mechanically disconnected from the second output part 2, the second output part 2 cannot be driven, in the second working mode, when the driving component 4 works, the driving component 4 can only drive the second output part 2 connected with the driving component to work in a moving way, the driving component 4 is mechanically disconnected from the first output part 1, and the first output part 1 cannot be driven. The user selects the operation mode of the multi-tool electric power tool 100 by the switching means, and selects the operable output unit.

The control unit 6 controls the operational state of the drive assembly 4, such as start, stop, rotational speed, steering, etc. of the drive assembly 4. The control unit 6 includes a controller.

The control assembly is connected to the control unit 6, and when the user triggers the control assembly, the control assembly transmits a signal to the control unit 6, and the control unit 6 accordingly controls the operation state of the driving assembly 4 in response. Thereby, the control unit 6 can change the motion state of the driving assembly 4 according to the user's demand, thereby controlling the operation of the first output part 1 and the second output part 2. The control components include, but are 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 operation state of the driving assembly 4 according to the control program.

The recognition unit 5 is connected to the control unit 6, and the control unit 6 recognizes the position of the switching member based on the recognition unit 5 to recognize the operation mode of the electric power tool 100.

In one embodiment, the control assembly comprises a user-activated first control assembly 31, the control unit 6 being connected to the first control assembly 31; when the control unit 6 recognizes that the electric 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 electric power tool 100 is in the second operation mode, the control unit 6 controls the first control component 31 to be in the failure state.

In another embodiment, the control assemblies include a first user-triggered control assembly 31 and a second user-triggered control assembly 32, and the control unit 6 is connected to the first control assembly 31 and the second control assembly. When the control unit 6 recognizes that the electric tool 100 is in the first working mode, the control unit 6 controls the first control component 31 to be in an active state and controls the second control component 32 to be in a failure state, and the control unit 6 controls the working state of the first output part 1 according to a signal input by the first control component 31; when the control unit 6 recognizes that the electric power tool 100 is in the second working mode, the control unit 6 controls the first control component 31 to be in the failure state and controls the second control component 32 to be in the effective state, and the control unit 6 controls the working state of the second output part 2 according to the signal input by the second control component 32.

The control unit 6 controls a certain control component to be in an effective state, which means that the control unit 6 can acquire a signal transmitted by the control component and execute corresponding control; the control unit 6 controls a control component to be in a failure state, which means that the controller does not acquire the signal transmitted by the control component or acquire that the corresponding control is not executed, and the user trigger does not work on the electric tool 100.

The electric tool 100 of the present invention adopts a software method, so that when a user selects a certain working mode/output portion, the control components corresponding to the other working mode/output portions are disabled, thereby preventing the control components from being triggered by mistake and avoiding the possibility of causing:

1. the function control of the output part is disordered and the effect is poor. For example: when the user switches the electric tool 100 to the second working mode, and the user triggers the first control assembly 31 by mistake, the second output part 2 will grind at a low speed, the control of the function is disordered and the efficiency is low, the user can think that the tool is bad, otherwise, when the user switches the electric tool 100 to the first working mode and the user triggers the second control assembly 32 by mistake, the first output part 1 drills at a high speed, the control of the function is disordered and the working surface is damaged by mistake, the rotating speed is out of control, and the user can think that the tool is bad.

2. And (4) safety problems. For example: the first control component 31 and the second control component 32 are start-stop switches, a user wants to use the first output portion 1, but the electric tool 100 is switched to the second working mode by mistake, and at this time, the user triggers the first control component 31 (that is, triggers a control component not corresponding to the current working mode of the electric tool 100 by mistake), so that the second output portion 2 is started by mistake, because the user wants to use the first output portion 1, whether the second output portion 2 is in a safe position is not concerned, and the second output portion 2 is started by mistake, so that a workpiece or an article is damaged, and a human body is injured by mistake.

The software scheme ensures that the multiple working modes of the electric tool 100 with multiple working heads/output parts do not interfere with each other, and has stable performance and high safety.

Further, the first control assembly 31 includes a first start-stop switch operated by a user for controlling the start and stop of the driving assembly 4; the second control assembly 32 includes a user-operated second start switch for controlling the start and stop of the drive assembly 4. Therefore, the invention correspondingly avoids the safety problem caused by the false triggering of the control component.

Further, the first control assembly 31 comprises a first user-operated parameter setting for controlling an operating parameter of the drive assembly 4; the second control assembly 32 includes a user operated second parameter setting for controlling an operating parameter of the drive assembly 4. The operating parameter includes at least one of steering, rotational speed, current, voltage, torque. Therefore, the invention correspondingly avoids the problems of disordered control and poor effect of the function of the output part caused by the false triggering of the control component.

The switching assembly is also provided with a third position, when the switching assembly is at the third position, the driving assembly 4 and the first output part 1 are in a disconnected state, and the driving assembly 4 and the second output part 2 are in a disconnected state; when the control unit 6 recognizes that the switching member is located at the third position, the control unit 6 controls the first control member 31 and the second control member 32 to be in the disabled state. When a user operates the switching component to move, deviation may exist, so that the switching component is not placed at the first position or the second position, the driving component 4 is mechanically disconnected from any output part, if the control component is triggered at the moment, the driving component 4 starts and idles, any output part cannot operate, and the user only hears the sound generated by the operation of the driving component 4, so that on one hand, energy is wasted, and on the other hand, the user mistakenly thinks that the tool is damaged. Thus, the position of the switching member includes an active position, which is a position in which the drive member 4 and a certain output section are in a connected state, such as the first position and the second position described above, and a deactivated position, which is a position in which the drive member 4 and all output sections are in a disconnected state (inactive position), corresponding to the active position. When the switching assembly is in the failure position, namely the third position, all the control assemblies are in the failure state and cannot be triggered by mistake, so that the idling of the electric tool 100 is avoided, the energy is saved, and the user experience is improved.

Further, the power tool 100 includes a warning light. The warning lamp is connected with the control unit 6, and when the control unit 6 identifies that the switching component is located at the third position, the warning lamp is controlled to work to remind a user that the switching component is not operated in place and is located at a failure position. The warning light works in modes such as flashing, color changing, etc.

When the power tool 100 is in different operation 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 storing a control program, the storage program includes preset parameters, and the control unit 6 can also automatically control the operation state of the driving assembly 4 according to the control program. Correspondingly, the present invention has a first control program and a second control program corresponding to different output portions, and when the electric tool 100 is in a certain working mode, the control unit 6 calls the corresponding control programs to control the driving component 4 to operate according to the preset parameters.

In one embodiment, the first operation mode is a screwdriver mode executed by the first output unit 1, and the second operation mode is an electric grinding mode executed by the second output unit 2. In other modes, other combinations are available, which are not described in detail, and all of which fall within the scope of the present invention.

Further, the identification unit 5 comprises a trigger piece and a sensing piece, wherein the trigger piece is arranged on the switching component; the sensing piece and the triggering piece move relatively and are used for sensing the triggering piece and generating a sensing signal; the control unit 6 is connected with the sensing piece, receives the sensing signal and identifies the position of the switching component according to the sensing signal.

Referring to fig. 15, a control method of the electric power tool 100 described above:

s1: identifying an operating mode of the power tool 100;

s21: when recognizing that the electric tool 100 is in the first working mode, controlling the first control assembly 31 to be in an effective state;

s22: when the power tool 100 is identified to be in the second operation mode, the first control assembly 31 is controlled to be in the failure state.

The control method can be applied to all electric tools 100 with multiple working heads, and the technical effects of no mutual interference, stable performance and high safety of the multiple working modes are achieved, and no repeated description is given.

Referring to fig. 1 to 11, a first embodiment is described in detail to illustrate the specific technical solution of the present invention:

referring to fig. 1 to 5, a first embodiment of the present invention relates to a double-headed electric tool 100, the double-headed electric tool 100 includes a housing, a driving assembly 4 housed in the housing, a first output portion 1 connected to one end of the driving assembly 4, a second output portion 2 connected to the other end of the driving assembly 4, a trigger 311 mounted on the housing, and a battery pack 200 connected to the housing, the battery pack 200 supplies power to the driving assembly 4 to drive the first output portion 1 and the second output portion 2 to operate, and the battery pack 200 is a lithium battery pack capable of performing cyclic charging.

In this embodiment, on the one hand, the housing comprises two symmetrically arranged and recessed half-shells, which cover an inner space into which the drive assembly 4 and the battery pack 200 can be fitted in a simple manner.

On the other hand, the housing includes a substantially cylindrical main body 101 extending in the front-rear direction and a grip portion 102 disposed at an angle with respect to the main body 101, the driving unit 4 is housed in 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, the first output portion 1 is located at the front side of the main body 101, the second output portion 2 is located at the rear side of the main body 101, that is, 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 located at opposite ends of the driving unit 4. Further, the first output part 1 is provided with the first working head 300, the second output part 2 is provided with the second working head 400, and the first working head 300 and the second working head 400 are different from each other, so that the double-headed electric tool 100 can output two different working modes at the same time. The user can meet two use requirements only by one tool, and the product experience of the user is greatly improved; the two tools are integrated on one product, so that the storage space required by a user is reduced; the two output parts are positioned at two opposite ends of the main body part 101, so that the first output part 1 and the second output part 2 are separated, the two output parts do not interfere with each other during operation, and the safety is high.

Further, the axis of the first output unit 1 and the axis of the second output unit 2 are parallel to each other or overlap each other.

Further, the included angle between the axis of the holding portion 102 and the axis of the first output portion 1 is not smaller than the included angle between the axis of the holding portion 102 and the axis of the second output portion 2. I.e. the axis of the grip portion 102 and the axis of the first output portion 1 are arranged perpendicular or inclined.

The trigger 311 and the battery pack 200 are both mounted on the grip portion 102, and the battery pack 200 is mounted inside the grip portion 102, so as to reduce the volume of the double-headed electric tool 100, and make the whole machine more compact and smaller, and convenient to operate; correspondingly, the holding part 102 is provided with a charging port 201 for charging the battery pack 200, the battery pack 200 is charged through the charging port 201, and the charging port 201 is positioned at the bottom of the holding part 102 far away from the main body part 101, so that the appearance of the whole machine is tidier.

Referring to fig. 4 and 5, two user operation modes are taught, wherein different output parts are operated correspondingly. The double-headed power tool 100 includes a pressing region 108 to be touched by a user, the pressing region 108 is distributed on the side of the grip portion 102 and the main body portion 101 close to the second output portion 2, and the trigger 311 is located on the side of the grip portion 102 facing the first output portion 1, i.e., the trigger 311 and the pressing region 108 are located on opposite sides of the grip portion 102.

Referring to fig. 4, a first operation mode is shown, in which the first output portion 1 is provided with a first working head 300, the first output portion 1 is a screwdriver output portion, the first working head 300 is a screwdriver head, the first working mode of the electric tool 100 is a screwdriver mode, and the first working head 300 is inserted into the first output portion 1 and performs a fastening operation under the action of the driving assembly 4. At this time, the user can perform the operation by holding the grip portion 102 with a hand and pressing the trigger 311 thereon.

Referring to fig. 5, a second operation mode is shown, in which a second working head 400 is mounted on the second output portion 2, the second output portion 2 is an electric grinding output portion, the second working head 400 is an electric grinding head, a second working mode of the electric tool 100 is an electric grinding mode, the second working head 400 is inserted into the second output portion 2, and the grinding operation is performed under the action of the driving assembly 4. At this time, the user holds the grip portion 102 with his hand, and presses the pressing area 108 with his forefinger and his thumb, so that the entire double-ended power tool 100 can be firmly controlled.

It is known to those skilled in the art that the torque value output by the first output part 1 of the screwdriver is larger than the torque value output by the second output part 2 of the electric grinder according to the requirement of the working condition. The output speed of the first output part 1 of the screwdriver is less than the output speed of the second output part 2 of the electric grinder.

It can be understood that, since the main body 101 extends in a longitudinal shape and has a region for the palm of the user to grip, the user can directly grip the main body 101 without using the grip 102 to perform work.

In the present embodiment, in the front-rear direction in which the main body portion 101 extends, the distance between the axis of the grip portion 102 and the distal end of the first output portion 1 is greater than the distance between the axis of the grip portion 102 and the distal end of the second output portion 2, that is, the grip portion 102 is located on the side of the main body portion 101 away from the first output portion 1 and close to the second output portion 2. Because the first output part 1 is a screwdriver, when the screwdriver is used for operation, the first output part 1 shakes greatly, and the holding part 102 is far away from the first output part 1, so that the balance of the tool is better, the user operation is more comfortable, the tool is not easy to fatigue, and the tool is convenient for the user to use in a narrow and long space; the second output part 2 is an electric grinder, and the holding part 102 is close to the second output part 2, so that the user can perform fine grinding operation.

Referring to fig. 6 to 8, the driving assembly 4 is a motor disposed in the main body 101. The electric tool 100 further includes a first transmission assembly 10 connected between the motor and the first output portion 1, a second transmission assembly 20 connected between the motor and the second output portion 2, and a switching assembly 8 connected to the first transmission assembly 10 and the second transmission assembly 20, wherein the first transmission assembly 10 and the second transmission assembly 20 are respectively located at two ends of the motor, and the first output portion 1 and the second output portion 2 are respectively located at two sides of the switching assembly 8. The switching component 8 is used for controlling the motor to alternatively drive the first output 1 via the first transmission component 10 or the second output 2 via the second transmission component 20, that is, the double-headed power tool 100 has a first working mode and a second working mode for user operation, in the first working mode/screwdriver mode, the first output 1 is operated, and the second output 2 is not operated; in the second operation mode/electric grinding mode, the second output 2 is operated, while the first output 1 is not operated, and the user manipulates the switching member 8 to switch between the first operation mode and the second operation mode. By arranging the switching assembly 8 between the first transmission assembly 10 and the second transmission assembly 20, only one of the first output part 1 and the second output part 2 can operate when the double-head electric tool 100 is used, and the safety of a user is greatly improved. Referring to fig. 12-13, the double-ended power tool 100 includes a control system, the control system controls the operation of the power tool 100, the control system is connected to the control unit 6 of the driving assembly 4 and a control assembly connected to the control unit 6, the control unit 6 is disposed on the circuit board 9, the circuit board 9 is disposed in the holding portion 102, the control assembly is disposed outside the housing and can be triggered by manual operation of a user, so as to transmit an input signal to the control unit 6, and the control unit 6 controls the operation state of the motor according to the signal.

The control assembly comprises a first control assembly 31 for the first output 1 and a second control assembly 32 for the second output 2, the first control assembly 31 comprising a forward rotation button 312, a reverse rotation button 313 and the above-mentioned trigger 311, the second control assembly 32 comprising an electro-pneumatic button 321, both connected to the control unit 6.

The forward rotation button 312 is a forward rotation setting and three-gear rotation speed adjusting button, and when the button is pressed once, the motor is set to rotate forward for multiple times, and the rotation speed of the motor is switched among low-speed forward rotation, medium-speed forward rotation, high-speed forward rotation and three-gear rotation; the reverse button 313 is a reverse setting and full speed setting button that is pressed once to set the motor in reverse and at full speed. The trigger 311 is the first start/stop switch in the screwdriver mode. The first parameter setting member includes here a forward rotation button 312 and a reverse rotation button 313.

The electric grinder button 321 is a start-stop switch and a three-gear speed adjusting button, and when the electric grinder button is pressed for multiple times, the motor is switched among low-speed starting, medium-speed starting, high-speed starting and closing-fourth gear. That is, the second start/stop switch and the second parameter setting unit are integrated with the user-operated trigger, i.e., the grinder button 321.

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

Referring to fig. 4-5, with the above two operations, respectively, corresponding to the operation of different output portions, since the trigger 311 is located at the grip portion 102, in the second operation mode, the trigger 311 used in the first operation mode is inevitably pressed.

The electric module further comprises an indicating module which comprises a screwdriver forward rotation indicating lamp, a screwdriver reverse rotation indicating lamp, an electric grinder indicating lamp and a gear indicating lamp 71. The screwdriver forward rotation indicator light, the screwdriver reverse rotation indicator light and the electric grinding indicator light are divided into LEDs which are respectively arranged on the forward rotation button 312, the reverse rotation button 313 and the electric grinding button 321 and are lightened along with the triggering of the forward rotation button 312, the reverse rotation button 313 and the electric grinding button 321. Gear indicator 71 includes three LED lamps, main body housing still is provided with that pilot region 110,3 gear indicator 71 arranges in pilot region 110 and arranges side by side along the fore-and-aft direction for the gear of motor speed under the instruction screwdriver mode and the electrosound mode, for example 1, 2, 3 lamps are lighted respectively to low-speed corotation under the screwdriver mode, medium speed corotation, then gear indicator 71 lights 3 lamps under the high-speed corotation, then gear indicator 71 lights 3 lamps under the reverse rotation full speed under the screwdriver mode, low-speed start under the electrosound mode, medium speed starts, 1, 2, 3 lamps are lighted respectively to gear indicator 71 under the high-speed start.

The electric power tool 100 further includes the above-described recognition unit 5. Specifically, the trigger of the identification unit 5 includes a first trigger 511 corresponding to the first output unit 1 and a second trigger 512 corresponding to the second output unit 2, the sensing element of the identification unit 5 includes a first sensing element 52151 corresponding to the first output unit 1 and a second sensing element 522 corresponding to the second output unit 2, when the switching component is located at the first position, the first trigger 511 triggers the first sensing element 521, the second sensing element 522 is not triggered, and the control unit 6 receives a first sensing signal from the first sensing element 521 to identify that the switching component is located at the first position; when the switching assembly is located at the second position, the second triggering element 512 triggers the second sensing element 522, the first sensing element 521 is not triggered, and the control unit 6 receives a second sensing signal from the second sensing element 522 to recognize that the switching assembly is located at the second position.

The switching assembly 8 includes a switching button 81 operated by a user and a connecting assembly connected to the switching button 81, the switching button 81 is disposed on the main body casing, the user operates the switching button 81 to switch the switching assembly between a first position and a second position, the connecting assembly is accommodated in the main body casing, and the switching button 81 drives the connecting assembly to move, so that the driving assembly 4 is alternatively connected to the first output portion 1 or the second output portion 2 through the connecting assembly.

Specifically, referring to fig. 9-10, the switch button 81 is a sliding member, a sliding slot 103 is correspondingly disposed on the main body housing, and the user pulls the sliding member to slide left and right in the sliding slot 103. The first trigger 511 and the second trigger 512 are respectively disposed at two ends of the switch button 81, and the first sensing member 521 and the second sensing member 522 are disposed inside the main housing along with the synchronous movement of the switch button 81. When the switch button 81 slides to the leftmost end, the switch component is located at the first position to trigger the first sensing element 521, when the switch button 81 slides to the rightmost end, the switch component is located at the second position to trigger the second sensing element 522, the switch button 81 slides but is not located at the first position and the second position, and then it is located at the third position, the first sensing element 521 and the second sensing element 522 are not triggered, and the electric tool 100 is located in the non-working mode. That is, only one of the first sensing member 521 and the second sensing member 522 is triggered, and the control unit 6 can receive only one of the first sensing signal and the second sensing signal, so as to identify whether the power tool 100 is in the first operation mode or the second operation mode.

In this embodiment, the sensing member is a hall sensor, and the triggering member is a magnetic member.

The control system of the electric tool 100 further includes a power-on self-locking circuit for the power module (battery pack), and when the tool is not used for a long time, the power-on self-locking circuit automatically loses power and switches an external power supply line of the battery pack, so that the control unit 6 is also powered off, the tool has no power consumption, and energy is saved. When a user triggers a certain switch, the power-on self-locking circuit is activated, the power supply system can start power supply to the control unit 6 and lock the power supply until the power supply is automatically cut off after the power supply system is not used for a long time again. As can be understood by those skilled in the art, the power-on self-locking circuit of the power module of the power tool 100 is a public technology and is not described herein.

Further, in a state that the tool does not consume power, a user may activate the power-on self-locking circuit by triggering any one of the trigger 311, the forward rotation button 312, the reverse rotation button 313, and the electric grinding button 321, so that the control unit 6 obtains power to operate, at this time, the control unit 6 first detects the identification unit 5 to identify the operating mode of the electric tool 100, when the electric tool 100 is identified to be in the first operating mode, the control unit 6 controls the trigger 311, the forward rotation button 312, and the reverse rotation button 313 to be in an active state, and at the same time, controls the electric grinding button 321 to be in a disabled state, when the electric tool 100 is identified to be in the second operating mode, the control unit 6 controls the trigger 311, the forward rotation button 312, and the reverse rotation button 313 to be in a disabled state, and when the electric tool 100 is identified to be not in the non-operating mode, the control unit 6 controls the trigger 311, the forward rotation button 312, the reverse rotation button 313, and the electric grinding button 321 to be in a disabled state. The valid state and the invalid state are the same as above, and are not described in detail.

This ensures that the first control unit 31 is used only in the first operating mode and the second control unit 32 is used only in the second operating mode. Firstly, the situation that the trigger 311 is triggered to cause the false start of the electric grinder in the electric grinder mode in fig. 5 is avoided, secondly, the problems that the control of the function of the output part is disordered and the effect is poor due to the confusion of the turning direction and the rotating speed of the screwdriver mode and the turning direction and the rotating speed of the electric grinder mode are avoided, and thirdly, with reference to the working condition of fig. 4 in particular, when a user wants to use the screwdriver, such as the holding part 102 holding a tool in a first operation mode, the screwdriver is advanced, the electric grinder is close to the shoulder or the lower bar of a human body, but the user mistakenly places the change-over switch at a second position, and then, the trigger 311 is pressed down, the electric grinder is triggered by mistake to rotate, and the electric grinder can possibly damage the human body.

The structure of the switching assembly of the first embodiment will be specifically described below.

Referring to fig. 6 to 8, the motor includes a first motor shaft 41 extending toward the first transmission assembly 10 and a second motor shaft 42 extending toward the second transmission assembly 20, both of which output the rotational power of the motor, the first transmission assembly 10 includes a first transmission portion 11 connected to the first output portion 1 and a first clutch 12 movably connecting the first motor shaft 41 and the first transmission portion 11, the second transmission assembly 20 includes a second transmission portion 21 connected to the second output portion 2 and a second clutch 22 movably connecting the second motor shaft 42 and the second transmission portion 21, and the switching assembly 8 is connected between the first clutch 12 and the second clutch 22.

In the present embodiment, the switching assembly 8 includes a switching knob 81 mounted on the main body 101 and a connecting assembly connected to the switching knob 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 member 12 and the switching knob 81, a second connecting member 84 connecting the switching knob 81 and the connecting plate 82, a third connecting member 85 connecting the connecting plate 82 and the second clutch member 22, and a fourth connecting member 86 connecting the first transmission portion 11 and the switching knob 81, and the switching knob 81 is moved to move 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 together to switch the positions of the first clutch member 12 and the second clutch member 22.

Alternatively, the first connecting member 83 can be connected between the first clutch member 12 and the connecting plate 82, and the switching button 81 can move to drive the first clutch member 12 to move.

In the present embodiment, the first connector 83, the second connector 84, the third connector 85, and the fourth connector 86 are all steel wires.

Referring to fig. 7 and 8, the double-headed electric tool 100 has a first operation mode for driving the first output part 1 to operate and a second operation mode for driving the second output part 2 to operate, in the first operation 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 is disconnected from the second motor shaft 42; in the second operating 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 is disengaged from the first motor shaft 41.

In the present embodiment, the first clutch 12 includes a first groove 121 recessed radially inward from the outer periphery, the second clutch 22 includes a second groove 221 recessed radially inward from the outer periphery, one end of the first connection member 83 is connected to the connection plate 82 or the switch button 81, and the other end is held 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 retained in the second groove 221.

Referring to fig. 8, the switch button 81 includes a shoulder 811 disposed on the left and right sides, a toggle portion 812 disposed on the upper side of the shoulder 811, and a first groove 813, a second groove 814 and a third groove 815 disposed on the lower side of the shoulder 811, wherein the toggle portion 812 protrudes out of the main body 101 for the convenience of user operation; second connector 84 is disposed within first slot 813, first connector 83 is disposed within third slot 815, and fourth connector 86 is disposed within second slot 814.

The double-ended electric power tool 100 includes a slide groove 103 extending from an inner wall of the body 101, and the switch knob 81 is housed in the slide groove 103, and the shoulder 811 reciprocates in the slide groove 103.

In the present 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 switch knob 81 to prevent the switch knob 81 from shaking during operation.

Referring to fig. 6-11, the first transmission part 11 includes a connection post 111 protruding radially outward from the outer periphery, the second connection member 84 includes a ring-shaped portion 841 sleeved on the connection post 111, and further, the switch button 81 and the connection plate 82 are located at two opposite sides of the upper and lower sides of the motor, and the ring-shaped portion 841 is located at a position approximately in the middle of the switch button 81 and the connection plate 82. The switch button 81 moves in the front-rear direction, and drives the second link 84 to pivot around the ring-shaped portion 841, thereby driving the connecting plate 82 to move in the front-rear direction.

As shown in fig. 11, the connecting plate 82 includes a base plate 823 extending along an axial direction of the motor, a first end 821 near the first transmission assembly 10, a second end 822 near the second transmission assembly 20, a guide seat 827 protruding from the first end 821 toward the first transmission assembly 10, a second bayonet 824 extending from the second end 822 toward the second transmission assembly 20, and a first bayonet 828 disposed on a side surface of the guide seat 827, the base plate 823 is connected between the first end 821 and the second end 822, the second connector 84 is held in the first bayonet 828, and the third connector 85 is installed in the second bayonet 824.

Further, the double-headed power tool 100 includes receiving portions 104 and 105 extending from an inner wall of the body 101, and the base plate 823 is supported by the receiving portions 104 and 105 and moves along the receiving portions 104 and 105; an end surface of the guide seat 827 facing the first transmission member 10 is provided with a guide surface 825, and the shape of the guide surface 825 is matched with the outer circumferential surface of the first transmission member 10 to limit and guide the forward and backward movement of the link plate 82.

Further, the guide seat 827 further includes a concave recess 826 recessed inward from the upper end surface of the guide surface 825, and the concave recess 826 removes part of the material used by the guide seat 827, so that the material cost of the connecting plate 82 is reduced, the connecting plate 82 is also lightened, and the user can switch the working mode more conveniently.

Referring to fig. 7 and 8, in the present embodiment, the first output part 1 is a screw driver, 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 output shaft of the electric grinder; the drive assembly 4 further comprises a shaft lock structure 130 connected to the second transmission part 21, which shaft lock structure 130 is pressed to prevent the electric grinder output shaft from rotating, thereby facilitating the user to change the electric grinder.

In this embodiment, the housing further includes an air inlet 140 and an air outlet 150 communicating with the inner space, the driving assembly 4 includes a fan connected to the motor, and the external cooling air enters the inner space through the air inlet 140 and dissipates heat to the driving assembly 4 under the action of the fan, and then is discharged from the air outlet 150.

It can be understood by those skilled in the art that the structure of the switching component is not limited to the manner in the embodiment, and other switching components capable of implementing switching of the working mode fall into the protection scope of the present invention, which is not listed here.

Second embodiment

The double-headed electric tool 100 according to the second embodiment of the present invention includes an identification unit 5, the identification unit 5 includes a trigger member and a sensing member, the trigger member includes a first magnetic member corresponding to the first output unit 1 and a second magnetic member corresponding to the second output unit 2, the first magnetic member and the second magnetic member are opposite, the sensing member is a hall sensor for sensing a magnetic field strength and a magnetic field polarity of the first magnetic member or a magnetic field strength and a magnetic field polarity of the second magnetic member, and generating a corresponding sensing signal. When the Hall sensor senses a magnetic field and the direction of the magnetic field is positive, a first sensing signal is sent out, and when the Hall sensor senses the magnetic field and the direction of the magnetic field is negative, a second sensing signal is sent out. The control unit 6 identifies whether the switching assembly is in the first position or the second position according to the received sensing signal, thereby identifying the electric operating mode.

It will be understood by those skilled in the art that the structure of the switching component is not limited to the manner in which the two embodiments of the present invention are implemented, and other identification units 5 capable of implementing the identification function are within the protection scope of the present invention and are not listed.

The driving unit 4 of the second embodiment is housed in the main body portion 101; the switching component is rotatably arranged at one end of the main body part 101, and the first output part 1 and the second output part 2 are fixedly arranged on the switching component and are positioned at the same side of the switching component; the switching member is rotated by a user operation to switch between a first position and a second position so that the driving member 4 is connected to the first output portion 1 or the second output portion 2 alternatively.

In the second embodiment, there is only one transmission assembly, the motor output shaft of the motor is connected with 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, the switching assembly is a rotating body, and the user rotates the rotating body so that one of the first input end and the second input end is connected with the output end of the transmission assembly so as to be connected with the driving assembly 4.

The double-headed electric tool 100 according to the second embodiment of the present invention is different from the first embodiment in overall shape, and the specific structures of the switching unit, the motor output shaft, the transmission unit, and the double output unit are different from those of the first embodiment, and the identification unit 5 is different from that of the first embodiment, and the rest parts are the same, and will not be described again.

The present invention is not limited to the above-described embodiments. Those skilled in the art will readily appreciate that there are numerous alternatives to the power tool 100 of the present invention without departing from the spirit and scope of the present invention. The protection scope of the present invention is subject to the content of the claims.

Claims (11)

1. An electric power tool, comprising: the device comprises a driving component, a first output part, a second output part, a switching component operated by a user, an identification unit, a control unit and a control component triggered by the user;

the driving assembly provides driving force for driving the first output part and the second output part to work;

the switching component moves under the operation of a user so as to switch between a first position and a second position; when the switching assembly is at the first position, the driving assembly is connected with the first output part, the driving assembly is disconnected with the second output part, and the electric tool is in a first working mode; when the switching assembly is at the second position, the driving assembly is disconnected with the first output part, the driving assembly is connected with the second output part, and the electric tool is in a second working mode;

the identification unit is connected with the control unit, and the control unit identifies the position of the switching component according to the identification unit so as to identify the working mode of the electric tool;

the control assembly comprises a first control assembly, and the control unit is connected with the first control assembly; when the control unit identifies that the electric tool is in a 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 a signal input by the first control component; when the control unit identifies that the electric tool is in the second working mode, the control unit controls the first control assembly to be in a failure state.

2. The power tool of claim 1, wherein the control assembly further comprises a second control assembly, the control unit being connected to the second control assembly; when the control unit identifies that the electric tool is in a first working mode, the control unit controls the second control component to be in a failure state; when the control unit identifies that the electric tool is in a 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 a signal input by the second control component.

3. The power tool of claim 2, wherein the first control assembly includes a user-operated first start-stop switch for controlling the start and stop of the drive assembly; the second control assembly includes a user-operated second start switch for controlling the start and stop of the drive assembly.

4. The power tool of claim 2, wherein the first control assembly includes a user-operated first parameter setting for controlling an operating parameter of the drive assembly; the second control assembly includes a user operated second parameter setting for controlling the operating parameters of the drive assembly.

5. The power tool of claim 1, wherein the switch assembly further has a third position in which the drive assembly is in an off state with the first output and the drive assembly is in an off state with the second output; when the control unit identifies that the switching assembly is located at the third position, the control unit controls the first control assembly and the second control assembly to be located in a failure state.

6. The power tool of claim 1, wherein the identification unit includes a trigger and a sensor, the trigger being disposed on the switch assembly; the sensing piece and the trigger piece move relatively to each other and are used for sensing the trigger piece and generating a sensing signal; the control unit is connected with the sensing piece, receives the sensing signal and identifies the position of the switching component according to the sensing signal.

7. The power tool of claim 6, wherein the trigger member includes a first trigger member corresponding to the first output portion and a second trigger member corresponding to the second output portion, the sensing member includes a first sensing member corresponding to the first output portion and a second sensing member corresponding to the second output portion, the first trigger member triggers the first sensing member when the switching assembly is in the first position, the second sensing member is not triggered, and the control unit receives a first sensing signal from the first sensing member to recognize that the switching assembly is in the first position; when the switching assembly is located at the second position, the second trigger piece triggers the second sensing piece, the first sensing piece is not triggered, and the control unit receives a second sensing signal from the second sensing piece so as to recognize that the switching assembly is located at the second position.

8. The power tool of claim 6, further comprising a main body portion, wherein the driving assembly is received in the main body portion, wherein the first output portion and the second output portion are respectively disposed at opposite ends of the driving assembly, and wherein the first output portion and the second output portion are respectively disposed at two sides of the switching assembly.

9. The power tool of claim 8, wherein the body portion includes a main housing, and the switch assembly includes a user-operated switch button and a connection assembly connected to the switch button:

the switching button is arranged on the main body shell, and a user operates the switching button to switch the switching component 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 alternatively connected with the first output part or the second output part through the connecting assembly.

10. The power tool of claim 9, further comprising a grip portion connected to and disposed at an angle relative to the body portion; the first control assembly comprises a first start-stop switch operated by a user and used for controlling the start and stop of the driving assembly, and the first start-stop switch is arranged on the holding part; the second control component comprises a second start-stop switch operated by a user and used for controlling the start and stop of the driving component, and the second start-stop switch is arranged on the main body part.

11. A control method applied to the electric tool of claim 1, characterized by identifying an operation mode of the electric tool;

when the electric tool is identified to be in the first working mode, controlling the first control assembly to be in an effective state;

and when the electric tool is identified to be in the second working mode, controlling the first control assembly to be in a failure state.

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