power tools

Abstract

The present invention relates to a power tool. During use, the working head is switched so that the working head is matched with the output shaft, ensuring that the motor can drive the working head to rotate through the output shaft to perform drilling or screwing operations. Since the power tool is equipped with a mode component and a main control board, when an operator needs to operate in different working modes, the operator directly triggers the mode component (for example, by pressing, sliding, rotating, etc.) to operate, so that the main control board controls the power tool to be set to the required working mode, thereby realizing variable functions of the same working head. At this time, the operator does not need to frequently switch the position of the working head, which effectively simplifies the operation of the power tool and improves work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment, in particular to a power tool. Background Art

[0002] With the rapid development of power technology, the application of power tools is becoming more and more extensive, and the types of power tools being developed are also increasing. For example: tools such as electric drills and screwdrivers need to frequently switch between the electric drill function and the screwdriver function under certain working conditions. Traditional single-function power tools cannot meet this demand, and multiple tools with different functions need to be provided at the same time to complete this task; therefore, power tools that integrate multiple functions have emerged. In other words, through the operation of the mode switching mechanism, a power tool can switch between different functional modes. Traditional multi-functional power tools generally only have one working head and can only clamp one working accessory at a time. Therefore, after a single task is completed, it is necessary to replace another working accessory and change the working mode corresponding to the working accessory; for example, drilling operations require a drill bit, and screwing operations require a screwdriver head. For operators, the tedious experience of replacing working heads is not friendly, the operation is troublesome and affects work efficiency.

[0003] To facilitate operator operation, tools with dual or multiple working heads are now available on the market. Each working head has a fixed function, for example, one head is set for drilling, the other for screwdriving. Because each working head can only perform one task, when switching between different working modes occurs, the operator must frequently reposition the working heads to ensure that the working head with the corresponding function is in the working position that mates with the output shaft. The working head with the other function, which is not currently in use, is moved to the non-working position; then the corresponding working attachment is installed in the working head with the corresponding function.

[0004] In fact, there are many work scenarios that require switching between different working modes. For example, to complete two holes of different sizes to complete a process, the work head that performs the drilling function needs to frequently switch between small and large drill bits. For example, to perform the screwdriver function, different sizes of screwdriver bits need to be replaced; there are also working conditions that require replacing a cross bit with a flat bit; for example, to perform the drilling function, there are also working conditions that require replacing a twist drill bit with a woodworking drill. Since a fixed-function work head can only be equipped with a work attachment corresponding to its function, this inevitably leads to the tedious replacement of work attachments in the same work head, which is extremely inefficient and has a poor operating experience. Summary of the Invention

[0005] Based on this, it is necessary to improve the shortcomings of the existing technology and propose a power tool to further enhance the operating experience, simplify the operating process and improve work efficiency.

[0006] A power tool comprises: a housing; a motor, the motor being arranged in the housing; an output shaft, the motor driving the output shaft to rotate; a working assembly, the working assembly comprising at least two working heads, the working heads being selectively placed in a working position matched with the output shaft; a control device, the control device comprising a mode assembly and a main control board electrically connected to the mode assembly; the mode assembly being operable to input a mode signal, the main control board setting the power tool to a drill mode or a screwdriver mode according to the received mode signal; when the power tool is in the drill mode, the working head in the working position outputs a constant torque, and when the power tool is in the screwdriver mode, the output torque of the working head in the working position is adjustable within a preset range; corresponding to any working head in the working position, the mode assembly is operable to switch the power tool between the drill mode and the screwdriver mode.

[0007] During use of the above-mentioned power tool, the working head is switched so that the working head is selected to be connected to the output shaft in the working position, thereby ensuring that the motor can drive the working head to rotate through the output shaft to perform drilling or screwing operations. Since a mode component is integrated in this power tool, when the operator needs to operate in different working modes, the operator can operationally input (for example, by pressing, sliding, rotating, etc.) the corresponding mode signal in the power tool through the mode component. The main control board controls the power tool to be set to the required working mode (such as drilling mode or screwdriver mode) according to the received mode signal, so that any working head is not limited to one working mode. In this way, the operator does not need to frequently switch the position of the working head during the operation, which effectively simplifies the operation of the power tool and improves work efficiency. In addition, when it is necessary to drill holes of different sizes or tighten screws of different types, different types of drill bits or screwdrivers can be installed on at least two working heads in advance. In this way, when using, you only need to switch the working head position and input the corresponding mode signal through the mode component to ensure that the power tool is always in the required working mode. You can complete the operations of drilling holes of different sizes or tightening screws of different types without frequently changing working accessories, further improving the product's operating experience.

[0008] In one embodiment, the power tool further includes a torque adjustment member electrically connected to the main control board. When the power tool is switched to a screwdriver mode, the torque adjustment member is activated, and the torque adjustment member is operable to set the output torque of the working head within a preset range.

[0009] In one embodiment, the power tool further includes a display electrically connected to the torque adjustment member, and the display is used to display the output torque set by the torque adjustment member.

[0010] In one embodiment, the power tool includes a gear transmission mechanism arranged between the motor and the output shaft, and a gear adjustment member movable between a first position and a second position relative to the housing; when the power tool is in drilling mode and the gear adjustment member is in the first position, the gear transmission mechanism has a first transmission ratio, and the working head in the working position can output a first constant speed; when the power tool is in drilling mode and the gear adjustment member is in the second position, the gear transmission mechanism has a second transmission ratio, and the working head in the working position can output a second constant speed.

[0011] In one embodiment, the control device further includes a detection device for detecting the gear adjustment member, and the detection device is electrically connected to the main control board. When the gear adjustment member is in a first position, the detection device sends a first detection signal, and when the gear adjustment member is in a second position, the detection device sends a second detection signal. The first detection signal is different from the second detection signal.

[0012] In one embodiment, when the power tool is in a drill mode, the main control board controls the motor to output a first constant torque according to the first detection signal, and controls the motor to output a second constant torque according to the second detection signal, and the first constant torque is different from the second constant torque; when the power tool is in a screwdriver mode, the main control board controls the output torque of the motor to be adjustable within a first preset range according to the first detection signal, and controls the output torque of the motor to be adjustable within a second preset range according to the second detection signal, and the first preset range is different from the second preset range.

[0013] In one embodiment, the control device also includes a linkage switch electrically connected to the main control board, the linkage switch includes a first switch part arranged on the shell, and a second switch part arranged on the working component, the working component is rotatably arranged relative to the shell, when one of the working heads rotates to a preset position relative to the shell, the first switch part and the second switch part interact with each other and generate an electrical signal, and the main control board matches the preset working mode for the power tool according to the electrical signal.

[0014] In one embodiment, the linkage switch is configured as a non-contact switch, the first switch portion is one of a magnet and a Hall element, and the second switch portion is the other of a magnet and a Hall element. When one of the working heads rotates to a preset position relative to the housing, the Hall element and the magnet generate an induction signal. When one of the working heads rotates to a first preset position relative to the housing, the Hall element and the magnet generate a first induction signal, and the main control board controls the power tool to be in one of a drill mode and a screwdriver mode; when one of the working heads rotates to a second preset position relative to the housing, the Hall element and the magnet generate a second induction signal, and the main control board controls the power tool to be in the other of a drill mode and a screwdriver mode.

[0015] In one embodiment, the mode component includes a signal sensor and at least one triggering component, the signal sensor is electrically connected to the main control board, and the triggering component is operable to trigger the signal sensor to transmit a mode signal to the main control board.

[0016] In one embodiment, the control device further includes an indicator, which is electrically connected to the main control board and is used to indicate the current working mode of the power tool. The indicator includes a first indicator and a second indicator. When the power tool is in a drilling mode, the first indicator is in a working state. When the power tool is in a screwdriver mode, the second indicator is in a working state.

[0017] In one embodiment, the power tool further includes a control mechanism for controlling the locking or release of the working component relative to the housing.

[0018] In one embodiment, the control mechanism includes an operating button and a clutch sleeve linked to the operating button, the clutch sleeve is arranged on the output shaft, and the operating button is movably arranged on the shell. When the operating button moves, the clutch sleeve can be driven to move along the axial direction of the output shaft, so that the clutch sleeve is engaged with the working shaft of the working head and the working component is locked relative to the shell, or the clutch sleeve is disengaged from the working shaft of the working head and the working component is released and locked relative to the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of the power tool structure in one embodiment Figure 1 ;

[0022] Figure 2 A schematic diagram of the power tool structure in one embodiment Figure 2 ;

[0023] Figure 3 is a cross-sectional view of a power tool structure according to one embodiment;

[0024] Figure 4 A cross-sectional view of the power tool structure during mating according to one embodiment;

[0025] Figure 5 for Figure 4 An enlarged schematic diagram of a local structure of the power tool described in;

[0026] Figure 6 A cross-sectional view of a power tool structure when disengaged according to one embodiment;

[0027] Figure 7 for Figure 6 An enlarged schematic diagram of a local structure of the power tool described in;

[0028] Figure 8 This is an exploded schematic diagram of a reducer structure according to one embodiment;

[0029] Figure 9 is a schematic cross-sectional view of a reducer structure according to an embodiment;

[0030] Figure 10 is a logic control schematic diagram of a power tool according to one embodiment;

[0031] Figure 11 Schematic diagram of a circuit of a power tool according to an embodiment.

[0032] 100, power tool; 110, housing; 111, mounting hole; 112, slide; 113, torque adjustment member; 114, control switch; 115, handle; 120, motor; 130, output shaft; 140, working assembly; 141, working head; 1411, first working head; 1412, second working head; 142, rotating body; 1421, rotating axis; 150, control device; 151, main control board; 152, mode assembly; 1521, trigger member; 1522, signal sensor; 153, linkage switch; 154, indicator; 1541, first indicator; 1542, second indicator; 155, gear adjustment member; 156, gear transmission mechanism; 157, gear transmission mechanism; 158, gear transmission mechanism; 159, gear transmission mechanism; 160, gear transmission mechanism; 161, gear transmission mechanism; 162, gear transmission mechanism; 163, gear transmission mechanism; 164, gear transmission mechanism; 165, gear transmission mechanism; 166, gear transmission mechanism; 167, gear transmission mechanism; 168, gear transmission mechanism; 169, gear transmission mechanism; 170, gear transmission mechanism; 171, gear transmission mechanism; 172, gear transmission mechanism; 173, gear transmission mechanism; 174, gear transmission mechanism; 175, gear transmission mechanism; 176, gear transmission mechanism; 177, gear transmission mechanism; 178, gear transmission mechanism; 179, gear transmission mechanism; 180, gear transmission mechanism; 181, gear transmission mechanism; 182, gear transmission mechanism; 183, gear transmission mechanism; 184, gear transmission mechanism; 185, gear transmission mechanism; 186, gear transmission mechanism; 187, gear transmission mechanism; 188, gear transmission mechanism; 189, gear transmission 60. Sun gear; 1561. First planetary gear; 1562. Speed ​​regulating ring gear; 1563. Reducer; 1564. First planetary carrier; 1565. Second planetary gear; 1566. First inner ring gear; 1567. Second planetary carrier; 1568. Third planetary gear; 1569. Second inner ring gear; 157. Display; 160. Control mechanism; 161. Clutch sleeve; 1611. First buckle position; 1612. Second reset member; 16121. Second spring; 162. Operating button; 1621. Third buckle position; 1622. First reset member; 16221. First spring; 163. Transmission member; 1631. Second buckle position; 1632. Fourth buckle position; 170. Detection device. DETAILED DESCRIPTION

[0033] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 3A power tool 100 includes: a housing 110, a motor 120, an output shaft 130, a working assembly 140 and a control device 150. The motor 120 is disposed in the housing 110, and the motor 120 drives the output shaft 130 to rotate. The working assembly 140 includes at least two working heads 141. The working heads 141 can be selectively in a working position matched with the output shaft 130. The control device 150 includes a mode component 152 and a main control board 151 electrically connected to the mode component 152. The mode component 152 is used to input a mode signal, and the main control board 151 sets the power tool 100 to a drill mode or a screwdriver mode according to the received mode signal. When the power tool 100 is in the drill mode, the working head 141 in the working position outputs a constant torque. When the power tool 100 is in the screwdriver mode, the output torque of the working head 141 in the working position can be adjusted within a preset range; corresponding to any working head 141 in the working position, the mode component 152 can be operated to switch the power tool 100 between the drill mode and the screwdriver mode.

[0035] During use of the power tool 100, the working head 141 is switched so that the working head 141 is selected to be connected to the output shaft 130 and is in the working position, thereby ensuring that the motor 120 can drive the working head 141 to rotate through the output shaft 130 to perform drilling or screwing operations. Since the power tool 100 is integrated with a mode component 152, when the operator needs to operate in different working modes, the operator can operationally input (for example, by pressing, sliding, rotating, etc.) the corresponding mode signal in the power tool 100 through the mode component 152. The main control board 151 controls the power tool 100 to be set to the required working mode (such as drilling mode or screwdriver mode) based on the received mode signal, so that any working head 141 is not limited to one working mode. In this way, the operator does not need to frequently switch the position of the working head 141 during operation, effectively simplifying the operation of the power tool 100 and improving work efficiency. In addition, when it is necessary to drill holes of different sizes or tighten screws of different types, different types of drill bits or screwdrivers can be installed in advance on at least two working heads 141. In this way, when in use, it is only necessary to switch the position of the working head 141 and input the corresponding mode signal through the mode component 152 to ensure that the power tool 100 is always in the required working mode. The operation of drilling holes of different sizes or tightening screws of different types can be completed without frequently replacing working accessories, further improving the operating experience of the product.

[0036] It should be noted that the operational input method of the mode component 152 can be mechanical or touchscreen. When the mode component 152 is mechanical, the operator can manually input the corresponding mode signal by pressing, sliding, or rotating it, thereby triggering the main control board 151 to control the output. Furthermore, when the power tool 100 is in different operating modes, the output torque of the working head 141 in the working position can be constant or adjustable within a preset range. These two torque output methods can be achieved by controlling the input power of the motor 120. For example, when the main control board 151 receives the mode signal, it changes the circuitry within the power tool 100 to affect the input power to the motor 120, thereby changing the output torque of the motor 120. For example, the main control board 151 may be a single-chip microcomputer with an integrated driver module. When the MCU receives the mode signal, the driver module sends a MOS drive signal to the power module to achieve different power outputs. Since the circuitry between the MCU and the motor 120 is not the subject of improvement in this embodiment, its specific circuitry is not further described here. In addition, the mode component 152 of this embodiment should be understood to include at least an operating component and detection, control and other components associated with the operating component. Its specific structure can have various designs as long as it can trigger the power tool 100 to switch between the drill mode and the screwdriver mode.

[0037] It should also be noted that the operating modes of the power tool 100 include at least a drill mode and a screwdriver mode. The drill mode and screwdriver mode are pre-set in the power tool 100. For example, when the power tool 100 is switched to the drill mode, the output torque of the working head 141 in the working position is constant. When the power tool 100 is switched to the screwdriver mode, the output torque of the working head 141 in the working position can be adjusted within a preset range. The preset range can be determined based on the actual product.

[0038] For further information, please refer to Figure 2 The power tool 100 also includes a torque adjustment member 113 electrically connected to the main control board 151. When the power tool 100 is switched to the screwdriver mode, the torque adjustment member 113 is activated. It should be noted that the way the power tool 100 switches to the screwdriver mode is not limited to automatic switching or manual switching. As long as the power tool 100 is in the screwdriver mode, the torque adjustment member 113 can be triggered. When the torque adjustment member 113 is activated, the operator can use the torque adjustment member 113 to set the output torque of the working head 141 within a preset range to meet the screwdriving operation under different torques.

[0039] It should be noted that the torque adjustment member 113 can be adjusted by rotation or by pressing. When the torque adjustment member 113 is adjusted by rotation, the torque adjustment member 113 can be a dial-type potentiometer. When the torque adjustment member 113 is adjusted by pressing, the torque adjustment member 113 can be a button-type potentiometer.

[0040] It should also be noted that the torque adjustment member 113 can be set to one or more gears during the adjustment process. For example, after the torque adjustment member 113 is activated, each triggering can adjust the output torque of the working head 141 in the working position. Taking the nine-gear position as an example, after the torque adjustment member 113 is activated, each triggering can adjust the gear value of the output torque from gear 1 to gear 9 in sequence (of course, in other embodiments, it can also be adjusted in sequence). When the gear value is gear 9, it can be triggered again and the gear value can be reset to gear 1 in a cyclic manner.

[0041] For further information, please refer to Figure 2 The power tool 100 further includes a display 157 electrically connected to the torque adjustment member 113. The display 157 is used to display the output torque set by the torque adjustment member 113 so that the operator can accurately identify the current torque output of the working head 141 to ensure stable screwdriving operations.

[0042] Specifically, please refer to Figure 2 The display 157 is a display screen with an integrated digital tube. When the power tool 100 is in the drilling mode, the digital tube in the display 157 is off; when the power tool 100 is in the screwdriver mode, the digital tube in the display 157 is on. The digital tube in the display 157 can also display different gear values ​​(e.g., gear values ​​1 to 9) corresponding to the current output torque values ​​of the working head 141.

[0043] In one embodiment, please refer to Figure 2 The torque adjusting member 113 is arranged on the top of the housing 110, that is, the torque adjusting member 113 is arranged on the side surface of the housing 110 facing away from the handle 115, so as to facilitate the user's torque adjustment operation.

[0044] In one embodiment, please refer to Figure 3The power tool 100 includes a gear transmission mechanism 156 disposed between the motor 120 and the output shaft 130, and a gear adjustment member 155 movable relative to the housing 110 between a first position and a second position. When the power tool 100 is in drilling mode and the gear adjustment member 155 is in the first position, the gear transmission mechanism 156 has a first transmission ratio, and the working head 141 in the working position can output a first constant rotational speed. When the power tool 100 is in drilling mode and the gear adjustment member 155 is in the second position, the gear transmission mechanism 156 has a second transmission ratio, and the working head 141 in the working position can output a second constant rotational speed. Thus, when the power tool 100 is in drilling mode, the output of the working head 141 in the working position can be adjusted in at least two speeds. When the gear adjustment member 155 moves to the first position, the gear transmission mechanism 156's transmission ratio is changed to the first transmission ratio, causing the working head 141 in the working position to output at the first constant rotational speed. Likewise, when the gear adjustment member 155 moves to the second position, the transmission ratio of the gear transmission mechanism 156 is adjusted to the first transmission ratio, so that the working head 141 in the working position outputs at the second constant speed.

[0045] It should be noted that the movement of the gear adjustment member 155 may be, but is not limited to, a sliding manner, a rotating manner, a pressing manner, and the like.

[0046] For further information, please refer to Figure 8 and Figure 9The gear transmission mechanism 156 includes a sun gear 1560, a first planetary gear 1561 mounted on the sun gear 1560, and a speed regulating ring gear 1562 sleeved on the first planetary gear 1561. The speed regulating ring gear 1562 has a first position and a second position in the axial direction of the sun gear 1560. When the speed regulating ring gear 1562 is in the first position, the speed regulating ring gear 1562 is simultaneously engaged with the sun gear 1560 and the first planetary gear 1561. When the speed regulating ring gear 1562 is in the second position, the speed regulating ring gear 1562 is engaged with the first planetary gear 1561 and disengaged from the sun gear 1560. The adjusting member and the speed regulating ring gear 1562 are in transmission cooperation. In this way, during the adjustment process, when the speed regulating ring gear 1562 is in the first position, the speed regulating ring gear 1562 is simultaneously engaged with the gear plate of the sun gear 1560 and the first planetary gear 1561. At this time, the rotation on the motor 120 is directly transmitted to the sun gear 1560 through the speed regulating ring gear 1562 (that is, the speed regulating ring gear 1562 is in a rotatable state); when the speed regulating ring gear 1562 is in the second position, the speed regulating ring gear 1562 is disengaged from the sun gear 1560 (that is, the speed regulating ring gear 1562 is in a non-rotatable state under the restriction of the reduction gear box 1563). At this time, the rotation on the motor 120 can only be transmitted to the first planetary gear 1561, so that the first planetary gear 1561 revolves in the speed regulating ring gear 1562, driving the sun gear 1560 to rotate, thereby reducing the output power of the motor 120 and achieving a deceleration effect.

[0047] It should be noted that the gear transmission mechanism 156 of this embodiment can be composed of a multi-stage planetary gear assembly. At the same time, during the deceleration process, two-stage deceleration, three-stage deceleration, or more-stage deceleration effects can be achieved.

[0048] For further information, please refer to Figure 8 Gear transmission mechanism 156 also includes a reduction gearbox 1563, and a first planetary carrier 1564, second planetary gears 1565, a first inner ring gear 1566, a second planetary carrier 1567, a third planetary gear 1568, and a second inner ring gear 1569, all disposed within reduction gearbox 1563. First inner ring gear 1566 is sleeved around and meshed with second planetary gears 1565. First inner ring gear 1566 is fixed relative to reduction gearbox 1563. Second planetary gears 1565 are mounted on first planetary carrier 1564. The output shaft 130 of first planetary carrier 1564 meshes with first planetary gears 1561. Second inner ring gear 1569 is sleeved around and meshed with third planetary gears 1568.

[0049] The second inner ring gear 1569 is fixed relative to the reduction gear box 1563. The third planetary gear 1568 is mounted on the second planetary carrier 1567.

[0050] The second planet carrier 1567 is in driving connection with the output shaft 130 .

[0051] In one embodiment, please refer to Figure 3 The housing 110 is provided with a slot 112. The gear adjustment member 155 is located within the slot 112 and engages with the speed regulating ring gear 1562. The gear adjustment member 155 can move back and forth within the slot 112 along the axis of the output shaft 130. Therefore, when the operator needs to adjust the output speed of the power tool 100, they simply move the gear adjustment member 155 back and forth.

[0052] In one embodiment, please refer to Figure 3 The control device 150 further includes a detection device 170 for detecting the gear adjustment member 155. The detection device 170 is electrically connected to the main control board 151. When the gear adjustment member 155 is in the first position, the detection device 170 sends a first detection signal. When the gear adjustment member 155 is in the second position, the detection device 170 sends a second detection signal. The first detection signal is different from the second detection signal. In other words, the detection device 170 can accurately identify the specific position of the gear adjustment member 155, so that the control device 150 can make corresponding adjustments to the output torque of the motor 120.

[0053] It should be noted that the detection device 170 is a device capable of detecting the shift adjustment member 155 in the first or second position and transmitting an electrical signal sufficient for identification to the main control board 151. For example, the detection device 170 may be a Hall effect sensor and a magnet with two polarities arranged in opposite directions; or it may be another sensing device, such as a pressure-sensitive sensor or a light-sensitive sensor. This embodiment does not impose any specific limitations on this; it only needs to be able to detect the shift adjustment member 155 in the first or second position and transmit both the first and second detection signals.

[0054] Furthermore, when the power tool 100 is in the drill mode, the main control board 151 controls the motor 120 to output a first constant torque based on the first detection signal, and controls the motor 120 to output a second constant torque based on the second detection signal. The first constant torque is different from the second constant torque. When the power tool 100 is in the screwdriver mode, the main control board 151 controls the motor 120 to output an adjustable torque within a first preset range based on the first detection signal, and controls the motor 120 to output an adjustable torque within a second preset range based on the second detection signal, where the first preset range is different from the second preset range.

[0055] As can be seen, while the gear adjustment member 155 adjusts the transmission ratio of the gear transmission mechanism 156, the output torque of the motor 120 also changes accordingly. When the power tool 100 is in drilling mode, the gear adjustment member 155 moves between the first position and the second position to change the transmission ratio of the gear transmission mechanism 156. At the same time, the detection device 170 sends corresponding detection signals (i.e., the first detection signal and the second detection signal) to the main control board 151. At this time, the main control board 151 controls the motor 120 to output the corresponding constant torque (i.e., the first constant torque and the second constant torque), thereby ensuring that the working head 141 in the working position can output at different speeds.

[0056] Similarly, when the power tool 100 is in screwdriver mode, the gear adjustment member 155 moves between the first position and the second position to change the transmission ratio of the gear transmission mechanism 156. At the same time, the detection device 170 sends corresponding detection signals (i.e., the first detection signal and the second detection signal) to the main control board 151. At this time, the main control board 151 controls the output torque of the motor 120 to be adjusted within the corresponding preset range (i.e., the first preset range and the second preset range), thereby ensuring that the speed of the working head 141 in the working position is adjusted to the corresponding output range.

[0057] In one embodiment, please refer to Figure 3 The control device 150 also includes a linkage switch 153 electrically connected to the main control board 151. The linkage switch 153 includes a first switch portion disposed on the housing 110 and a second switch portion disposed on the working assembly 140. The working assembly 140 is rotatably disposed relative to the housing 110. When one of the working heads 141 rotates to a preset position relative to the housing 110, the first switch portion interacts with the second switch portion and generates an electrical signal. The main control board 151 matches the preset operating mode for the power tool 100 based on the electrical signal. When different working heads 141 rotate alternately to the preset positions, the first switch portion interacts with the second switch portion and sends an electrical signal to the main control board 151. At this time, the main control board 151 synchronizes the operating mode switching of the power tool 100 with the rotation of the working heads 141 based on the received electrical signal. For example, when one of the working heads 141 rotates to the preset position, that working head 141 automatically switches to the drilling mode. If the other working head 141 rotates to the preset position, the working head 141 at the current working position is changed, and the working mode corresponding to the working position is changed from the drilling mode to the screwdriver mode.

[0058] It should be noted that there are various structures of the linkage switch 153 , as long as the linkage switch 153 can synchronously change the working mode of the power tool 100 when the working head 141 is switched alternately.

[0059] It should also be noted that during the operating mode switching control process, an association is established between position parameters and operating modes, and the corresponding associated parameters are obtained. For example, if one of the working heads 141 rotates to the first preset position and the power tool 100 is in drill mode, the associated parameters are established as follows: the first preset position corresponds to drill mode, and the second preset position corresponds to screwdriver mode. After the associated parameters are established, if only the position parameter is obtained and the working head 141 rotates to the second preset position, the associated parameters remain unchanged, and the power tool 100 switches to screwdriver mode. If only the mode parameter is obtained, the working head 141 remains unchanged, but the associated parameters change. The association between the position parameter and the operating mode must be re-established (for example, the associated parameters are established as follows: the first preset position corresponds to screwdriver mode, and the second preset position corresponds to drill mode). The power tool 100 then switches to screwdriver mode. Of course, if both the position parameter and the mode parameter are obtained, both the working head 141 and the associated parameters change, and new associated parameters must be established. At this point, the corresponding operating mode of the power tool 100 remains the same as the original operating mode. The associated parameters include the first associated parameter and the second associated parameter. The position parameters include a first position parameter and a second position parameter, wherein the first association parameter is preset such that the first position parameter is associated with the first working mode and the second position parameter is associated with the second working mode. The second association parameter is preset such that the first position parameter is associated with the second working mode and the second position parameter is associated with the first working mode.

[0060] Specifically, the association parameters include a first association parameter and a second association parameter. The position parameters include a first position parameter and a second position parameter, wherein the first association parameter is preset such that the first position parameter is associated with the first working mode, and the second position parameter is associated with the second working mode. The second association parameters are preset such that the first position parameter is associated with the second working mode, and the second position parameter is associated with the first working mode.

[0061] For easier understanding, please refer to Figure 10 , taking the first working head 1411 and the second working head 1412 as an example, the first position parameter is set to the first working head 1411 rotating to the working position, and the second position parameter is set to the second working head 1412 rotating to the working position. At this time, the first associated parameter is: the first working head 1411 is associated with the first working mode, and the second working head 1412 is associated with the second working mode (recorded as associated parameter A); the second associated parameter is: the first working head 1411 is associated with the second working mode, and the second working head 1412 is associated with the first working mode (recorded as associated parameter B). At the same time, Figure 10Here, 1-1-A represents the first working head 1411, the first working mode, and associated parameter A; 1-2-B represents the first working head 1411, the second working mode, and associated parameter B, and so on. During the logic control process, when working head 141 is rotated, working head 141 switches, the working mode switches, and the mode-associated parameters remain unchanged. When the mode component 152 is pressed, working head 141 remains unchanged, the working mode switches, and the mode-associated relationships change.

[0062] Furthermore, the linkage switch 153 is configured as a non-contact switch. The first switch portion is a type of magnet and a Hall element, and the second switch portion is a type of magnet and a Hall element. When one of the working heads 141 rotates to a preset position relative to the housing 110, the Hall element and the magnet generate an induction signal. In this way, one of the first switch portion and the second switch portion is a magnet and the other is a Hall element. By utilizing the magnetoelectric effect between the Hall element and the magnet, when the working head 141 rotates to a preset position, the Hall element generates an induction signal (e.g., a high or low level signal) and transmits it to the main control board 151, triggering the main control board 151 to make corresponding circuit control, thereby switching the power tool 100 to the corresponding working mode.

[0063] Furthermore, when one of the working heads 141 rotates to a first preset position relative to the housing 110, the Hall element and the magnet generate a first sensing signal, causing the main control board 151 to control the power tool 100 to be in one of the drill mode and the screwdriver mode. When one of the working heads 141 rotates to a second preset position relative to the housing 110, the Hall element and the magnet generate a second sensing signal, causing the main control board 151 to control the power tool 100 to be in the other of the drill mode and the screwdriver mode. In this way, as one of the working heads 141 switches back and forth between the first and second preset positions, different first and second sensing signals are generated between the Hall element and the magnet, causing the main control board 151 to control the power tool 100 to be in one of the drill mode and the screwdriver mode.

[0064] It should be noted that the specific positions of the first preset position and the second preset position on the shell 110 can be determined according to the actual product. For example: when one of the working heads 141 rotates to the first preset position, the working head 141 is exactly in the working position; when one of the working heads 141 rotates to the second preset position, the other working head 141 is exactly in the first preset position, that is, in the working position.

[0065] It should also be noted that to improve signal recognition accuracy, magnets can be placed in the corresponding locations of each working head 141, with adjacent magnets having opposite poles, i.e., one with the north pole facing upward and the other with the south pole facing upward. When different working heads 141 are switched to working positions, the Hall effect sensor can obtain different sensing signals, thereby placing the power tool 100 in the corresponding operating mode.

[0066] Specifically, please refer to Figure 3 The working assembly 140 includes two working heads 141, namely a first working head 1411 and a second working head 1412. There are two working modes: a drill mode and a screwdriver mode. When the first working head 1411 rotates to a first preset position (i.e., when it is in the working position), the Hall effect element interacts with the magnet, sending a first sensing signal to the main control board 151, placing the power tool 100 in the drill mode. When the operator switches again, the first working head 1411 is in a second preset position (i.e., when the second working head 1412 is in the working position), the Hall effect element interacts with the magnet, sending a second sensing signal to the main control board 151, causing the power tool 100 to switch to the screwdriver mode. At this point, the operator can also manually switch the working mode using the mode assembly 152. Therefore, the mode assembly 152 of this embodiment can simultaneously change the working mode of the power tool 100 and the correspondence between the working heads 141 and the working mode. The linkage switch 153 simultaneously changes the working head 141 at the working position and the corresponding working mode of the power tool 100, but does not change the corresponding relationship between the working head 141 and the working mode.

[0067] In one embodiment, please refer to Figure 2 and Figure 3 The mode assembly 152 includes a signal sensor 1522 and at least one trigger 1521. The signal sensor 1522 is electrically connected to the main control board 151. The trigger 1521 is operable to trigger the signal sensor 1522 to transmit a mode signal to the main control board 151. When the trigger 1521 is triggered, the signal sensor 1522 transmits a mode signal to the main control board 151, enabling the power tool 100 to switch between drill mode and screwdriver mode. If a user needs to use a different working mode (e.g., drill mode or screwdriver mode) on the same working head 141, the user simply operates the trigger 1521 to cause it to move accordingly. When the signal sensor 1522 senses the movement of the trigger 1521, it receives a corresponding signal and transmits the corresponding mode signal to the main control board 151, causing the main control board 151 to control the change in the working mode of the power tool 100.

[0068] It should be noted that the signal sensor 1522 can be, but is not limited to, a variable resistor, a Hall effect sensor, or other signal sensing devices. Furthermore, the triggering element 1521 can be triggered mechanically, such as by sliding, rotating, or pressing up and down. Of course, the triggering element 1521 can also be triggered by a capacitive touch screen, a resistive touch screen, or other inductive touch methods.

[0069] For further information, please refer to Figure 2The housing 110 is provided with a mounting hole 111, and the signal sensor 1522 is located inside the housing 110. The trigger member 1521 can be press-fitted into the mounting hole 111, and at least a portion of the trigger member 1521 is exposed outside the housing 110. It can be seen that the trigger member 1521 of this embodiment is press-fitted.

[0070] It should be noted that the trigger member 1521 can be designed as one or two. When there is only one trigger member 1521, the same trigger member 1521 is used to control the switching between the drill mode and the screwdriver mode. For example, when triggered for the first time, the power tool 100 switches to the drill mode; when triggered again, the power tool 100 switches to the screwdriver mode, and the switching cycle repeats. When there are two trigger members 1521, the two trigger members 1521 are used to control the drill mode and the screwdriver mode respectively, making the switching of working modes more convenient.

[0071] In one embodiment, please refer to Figure 1 and Figure 3 The control device 150 also includes an indicator 154. This indicator 154 is electrically connected to the main control board 151 and is used to indicate the current operating mode of the power tool 100. This indicator 154 clearly indicates the operating mode of the working head 141 in its working position, allowing the operator to accurately and quickly adjust the power tool 100 to the desired operating mode, allowing the operator to quickly complete drilling or screwdriving operations.

[0072] It should be noted that the indicator 154 can be an indicator light, a display screen, or other indicator objects, such as electrochromic polymers. When the indicator 154 is an indicator light (such as an LED light), the current working mode is indicated by turning the light on or off. For example, when the light is on, the current working mode is drill mode, and when the light is off, the current working mode is screwdriver mode. Of course, the number of indicator parts 154 can be one, two, three, or more. When there are multiple indicator parts 154, all of the multiple indicator parts 154 can be indicator lights or display screens; or, some of the indicator parts 154 can be indicator lights, and other indicator parts 154 can be display screens.

[0073] For further information, please refer to Figure 2 The indicator 154 includes a first indicator 1541 and a second indicator 1542. When the power tool 100 is in drill mode, the first indicator 1541 is in operation. When the power tool 100 is in screwdriver mode, the second indicator 1542 is in operation. Thus, one indicator 154 is used to indicate whether the attached working head 141 is in drill mode, and the other indicator 154 is used to indicate whether the attached working head 141 is in screwdriver mode.

[0074] For further information, please refer to Figure 2 The first indicator 1541 and the second indicator 1542 are both indicator lights. The first indicator 1541 is arranged side by side at the top of the housing 110, that is, the first indicator 1541 and the second indicator 1542 are both arranged on the side of the housing 110 facing away from the handle 115. For convenient indication, the first indicator 1541 can be integrated with the trigger 1521. When the trigger 1521 is triggered, the first indicator 1541 illuminates and the second indicator 1542 turns off, indicating that the power tool 100 is in the drill mode. When the trigger 1521 is triggered again, the first indicator 1541 turns off and the second indicator 1542 illuminates, indicating that the power tool 100 is in the screwdriver mode. Of course, in other embodiments, the first indicator 1541 can be designed to illuminate and the second indicator 1542 to indicate the screwdriver mode, while the first indicator 1541 turns off and the second indicator 1542 illuminates to indicate the drill mode.

[0075] In one embodiment, please refer to Figure 3 The power tool 100 also includes a control mechanism 160. The control mechanism 160 is used to control the locking or release of the working assembly 140 relative to the housing 110. Thus, when one of the working heads 141 rotates to a working position, the control mechanism 160 engages the working head 141 with the output shaft 130 and locks it to the housing 110, allowing the motor 120 to transmit power to the working head 141. When the working head 141 needs to be replaced, the control mechanism 160 is used again to release the current working head 141 from the output shaft 130 and from the housing 110.

[0076] For further information, please refer to Figures 4 to 7 The control mechanism 160 includes an operating button 162 and a clutch sleeve 161 linked to the operating button 162. The clutch sleeve 161 is sleeved on the output shaft 130. The operating button 162 is movably arranged on the housing 110. When the operating button 162 moves, it can drive the clutch sleeve 161 to move along the axial direction of the output shaft 130, so that the clutch sleeve 161 is matched with the working shaft of the working head 141 and the working component 140 is locked relative to the housing 110, or the clutch sleeve 161 is disengaged from the working shaft of the working head 141 and the working component 140 is released from the housing 110. Please refer to Figure 4 and Figure 5 When the operator needs to replace the working head 141, the operating button 162 is triggered to move, driving the clutch sleeve 161 to move away from the working assembly 140 along the axis of the output shaft 130, so that it is disengaged from the working head 141 and the working assembly 140 is unlocked from the housing 110. At this time, the operator can switch the required working head 141 to the working position; please refer to Figure 6 and Figure 7After switching, by releasing or reversing the triggering button 162, the clutch sleeve 161 moves along the axis of the output shaft 130 toward the working assembly 140, thereby engaging the clutch sleeve 161 with the desired working head 141 and locking the working assembly 140 to the housing 110. The locking or unlocking between the working assembly 140 and the housing 110 can be achieved by a snap-fit ​​method, for example, by providing an elastic hook structure on the working assembly 140 and a slot structure on the housing 110.

[0077] It should be noted that the operating button 162 can be directly connected to the clutch sleeve 161 to form an integral structure. In this case, when the operating button 162 moves, it directly drives the clutch sleeve 161 to move together. Of course, the operating button 162 can also be indirectly connected to the clutch sleeve 161, that is, an intermediate structure is used between the operating button 162 and the clutch sleeve 161 for transmission. In addition, the clutch sleeve 161 of this embodiment has a cylindrical structure.

[0078] Optionally, the operating button 162 may move on the housing 110 by rotating, sliding, rotating or pressing.

[0079] In one embodiment, please refer to Figure 5 and Figure 7 The control mechanism 160 further includes a transmission member 163 located within the housing 110. The operating button 162 is connected to the clutch sleeve 161 via the transmission member 163, meaning that the transmission between the operating button 162 and the clutch sleeve 161 is indirect. Thus, the transmission member 163 facilitates the movement of the clutch sleeve 161 under the control of the operating button 162.

[0080] For further information, please refer to Figure 6 The clutch sleeve 161 is provided with a first buckle position 1611 . The transmission member 163 is provided with a second buckle position 1631 that is snap-fitted with the first buckle position 1611 .

[0081] Optionally, the first buckle position 1611 is a groove or hole structure, and the second buckle position 1631 is a convex structure; or, the first buckle position 1611 is a convex structure, and the second buckle position 1631 is a groove or hole structure.

[0082] In one embodiment, please refer to Figure 7 The operating button 162 is rotatably mounted on the housing 110 , and a third buckle position 1621 is defined on the operating button 162 . The transmission member 163 is provided with a fourth buckle position 1632 that is snap-fitted with the third buckle position 1621 .

[0083] Optionally, the third buckle position 1621 is a slot or hole structure, and the fourth buckle position 1632 is a convex structure; or, the third buckle position 1621 is a convex structure, and the fourth buckle position 1632 is a slot or hole structure.

[0084] In one embodiment, please refer to Figure 6 The control mechanism 160 further includes a first return member 1622. The first return member 1622 is disposed between the operating button 162 and the housing 110 and is used to return the operating button 162 to its initial position. Thus, after the operating button 162 moves to contact the coupling between the clutch sleeve 161 and the working head 141, releasing the operating button 162 causes the operating button 162 to return to its initial position under the action of the first return member 162, thereby simultaneously causing the clutch sleeve 161 to return to its initial position.

[0085] Optionally, the first restoring member 1622 may be a spring, elastic rubber, or elastic metal sheet.

[0086] Specifically, please refer to Figure 6 The first restoring member 1622 is a first spring 16221 .

[0087] Likewise, in another embodiment, please refer to Figure 7 The control mechanism 160 further includes a second return member 1612. The second return member 1612 is disposed between the clutch sleeve 161 and the output shaft 130 and is used to return the clutch sleeve 161 to its initial position. Thus, when the operating button 162 is released, the clutch sleeve 161 is returned to its initial position under the action of the second return member 1612.

[0088] Optionally, the second restoring member 1612 may be a spring, elastic rubber, or elastic metal sheet.

[0089] Specifically, please refer to Figure 7 The second return member 1612 is a second spring 16121. The second spring 16121 is sleeved on the output shaft 130 and is connected to or in contact with the clutch sleeve 161.

[0090] In one embodiment, the power tool 100 further includes a control switch 114 electrically connected to the main control board 151 to realize the start and stop control of the power tool 100. In order to facilitate understanding of the circuit control principle of the power tool 100 in this embodiment, please refer to Figure 11 .

[0091] In one embodiment, please refer to Figure 3 The working assembly 140 further includes a rotatable body 142 rotatably mounted on the housing 110. The rotatable body 142 has a rotation axis 1421 and rotates around the rotation axis 1421 on the housing 110. At least two working heads 141 are spaced apart and symmetrically arranged on the rotatable body 142.

[0092] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0093] The above embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

[0094] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0095] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0096] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0097] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0098] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

Claims

1. A power tool, characterized in that: The power tool comprises: case; a motor, the motor being disposed in the housing; an output shaft, the motor driving the output shaft to rotate; A working assembly, the working assembly comprising at least two working heads, the working heads being selectively positioned in a working position to engage with the output shaft; A control device, the control device including a mode component and a main control board electrically connected to the mode component; the mode component is used to input a mode signal, and the main control board sets the power tool to a drill mode or a screwdriver mode according to the received mode signal; when the power tool is in the drill mode, the working head in the working position outputs a constant torque, and when the power tool is in the screwdriver mode, the output torque of the working head in the working position is adjustable within a preset range; corresponding to any working head in the working position, the mode component is operable to switch the working head of the power tool in the working position between the drill mode and the screwdriver mode without switching the working head in the working position.

2. The power tool according to claim 1, wherein: The power tool further includes a torque adjustment member electrically connected to the main control board. When the power tool is switched to a screwdriver mode, the torque adjustment member is activated and operable to set the output torque of the working head within a preset range.

3. The power tool according to claim 2, wherein: The power tool further includes a display electrically connected to the torque adjustment member, wherein the display is configured to display the output torque set by the torque adjustment member.

4. The power tool according to claim 1, wherein: The power tool includes a gear transmission mechanism disposed between a motor and an output shaft, and a gear adjustment member movable relative to a housing between a first position and a second position; when the power tool is in a drilling mode and the gear adjustment member is in the first position, the gear transmission mechanism has a first transmission ratio, and a working head in a working position can output a first constant speed; When the power tool is in the drilling mode and the gear adjustment member is in the second position, the gear transmission mechanism has a second transmission ratio, and the working head in the working position can output a second constant speed.

5. The power tool according to claim 4, characterized in that: The control device also includes a detection device for detecting the gear adjustment member, which is electrically connected to the main control board. When the gear adjustment member is in a first position, the detection device sends a first detection signal. When the gear adjustment member is in a second position, the detection device sends a second detection signal. The first detection signal is different from the second detection signal.

6. The power tool according to claim 5, characterized in that: When the power tool is in a drill mode, the main control board controls the motor to output a first constant torque according to the first detection signal, and controls the motor to output a second constant torque according to the second detection signal, and the first constant torque is different from the second constant torque; when the power tool is in a screwdriver mode, the main control board controls the output torque of the motor to be adjustable within a first preset range according to the first detection signal, and controls the output torque of the motor to be adjustable within a second preset range according to the second detection signal, and the first preset range is different from the second preset range.

7. The power tool according to claim 1, wherein: The control device also includes a linkage switch electrically connected to the main control board, the linkage switch includes a first switch part arranged on the shell, and a second switch part arranged on the working component, the working component is rotatably arranged relative to the shell, when one of the working heads rotates to a preset position relative to the shell, the first switch part and the second switch part interact and generate an electrical signal, and the main control board matches the preset working mode for the power tool according to the electrical signal.

8. The power tool according to claim 7, wherein: The linkage switch is configured as a non-contact switch, the first switch portion is one of a magnet and a Hall element, and the second switch portion is another of a magnet and a Hall element. When one of the working heads rotates to a preset position relative to the housing, the Hall element and the magnet generate an induction signal. When one of the working heads rotates to a first preset position relative to the housing, the Hall element and the magnet generate a first induction signal, and the main control board controls the power tool to be in one of a drill mode and a screwdriver mode; when one of the working heads rotates to a second preset position relative to the housing, the Hall element and the magnet generate a second induction signal, and the main control board controls the power tool to be in the other of a drill mode and a screwdriver mode.

9. The power tool according to claim 1, wherein: The mode component includes a signal sensing component and at least one triggering component. The signal sensing component is electrically connected to the main control board. The triggering component can operably trigger the signal sensing component to transmit a mode signal to the main control board.

10. The power tool according to claim 1, wherein: The control device also includes an indicator, which is electrically connected to the main control board and is used to indicate the current working mode of the power tool. The indicator includes a first indicator and a second indicator. When the power tool is in the drill mode, the first indicator is in the working state. When the power tool is in the screwdriver mode, the second indicator is in the working state.

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