Electric drill

Abstract

The invention discloses an electric drill which relates to the field of electric tools and comprises a main body, the electric drill has a large-torque mode and a small-torque mode, and when the electric drill is in the small-torque mode, a motor outputs small torque to drive a working head to rotate. When the electric drill is in a large-torque mode, the motor outputs large torque to drive the working head to rotate or / and impact while driving the working head to rotate; the auxiliary handle is detachably mounted to the main body; a first detection unit provided in the main body; a second detection unit provided in the main body; a control unit that controls the operating state of the motor; when the second detection part detects that the electric drill is in a large torque mode, if the first detection part detects that the auxiliary handle is not mounted on the main body, the motor cannot be started; if the first detection part detects that the auxiliary handle is mounted on the main body, the motor can be normally started; when the second detection part detects that the electric drill is in the small torque mode, the motor can be normally started. The device has the advantage of being high in use safety.

Description

Technical Field

[0001] The present invention relates to the technical field of electric tools, in particular to an electric drill. Background Art

[0002] An electric drill is a commonly used power tool. A working head is set on the output shaft of the drive assembly. The working head is driven by a motor to rotate to work. Different drilling tools, such as drill bits, taps or reamers, can be installed on the working head according to work requirements.

[0003] As material processing demands increase, the output torque of electric drills on the market continues to increase to cope with drilling tasks in hard materials such as concrete and metal. However, during high-torque operations, the reaction force of the electric drill is significantly increased. If the user does not use the auxiliary handle to distribute the torque, holding the drill with one hand can easily lead to wrist sprains or loss of control of the device, posing a safety hazard. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art to a certain extent. To this end, the present invention provides an electric drill with the advantage of high safety in use.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: An electric drill comprises: a main body, the main body including a working head and a motor, the electric drill having a high torque mode and a low torque mode, wherein when the electric drill is in the low torque mode, the motor outputs a low torque to drive the working head to rotate, and when the electric drill is in the high torque mode, the motor outputs a high torque to drive the working head to rotate or drives the working head to rotate and impact at the same time; an auxiliary handle, which is detachably mounted to the main body; a first detection part, which is provided on the main body and is used to detect whether the auxiliary handle is mounted on the main body; a second detection part, which is provided on the main body and is used to detect the working mode of the electric drill; a control part, which controls the working state of the motor according to the detection results of the first detection part and the detection results of the second detection part; when the second detection part detects that the electric drill is in the high torque mode, if the first detection part detects that the auxiliary handle is not mounted on the main body, the motor cannot be started; if the first detection part detects that the auxiliary handle is mounted on the main body, the motor can be started normally; when the second detection part detects that the electric drill is in the low torque mode, the motor can be started normally.

[0006] In this application, the main body is provided with a first detection unit and a second detection unit. When the second detection unit detects that the electric drill is in low-torque mode, the motor can be started normally, regardless of whether the first detection unit detects that the auxiliary handle is installed, allowing the electric drill to rotate normally and operate in the low-torque state. When the second detection unit detects that the electric drill is in high-torque mode, the control unit will perform different control actions based on the detection result of the first detection unit. If the first detection unit detects that the auxiliary handle is not installed on the main body, the control unit will control the motor to prevent it from starting, preventing unstable operation or safety accidents caused by the lack of the auxiliary handle. If the first detection unit detects that the auxiliary handle is installed on the main body, the control unit will control the motor to start, allowing the electric drill to rotate in high-torque mode or to impact axially while rotating, thereby improving the safety of electric drill use. The first and second detection units work together to prevent users from forgetting to install the auxiliary handle when operating in high-torque mode, avoiding safety accidents such as tool slipping and loss of control caused by unstable operation, thereby ensuring the personal safety of users. In addition, there is no need to compulsorily install an auxiliary handle in low-torque mode, which simplifies the operation process and improves work efficiency. It is suitable for scenarios where torque requirements are not high, operating space is limited, or fast operations are required.

[0007] Optionally, an adjustment component is further provided on the main body, which is installed on the main body and can be operated to set the preset torque of the electric drill; the adjustment component includes a triggering member for triggering the second detection part, and the control part determines the working mode of the electric drill according to the signal of the second detection part.

[0008] The adjustment component allows the user to set the drill's preset torque, enabling the drill to precisely output torque according to different operational requirements. This improves accuracy and quality, making it suitable for a variety of work scenarios with varying torque requirements. Furthermore, the coordinated operation of the adjustment component's trigger, the second detection unit, and the control unit allows for accurate determination of the drill's operating mode, streamlining the operational process and improving efficiency. Combined with the first detection unit's detection of the auxiliary handle's installation status, the motor is activated only when the auxiliary handle is installed in high-torque mode. This prevents accidents such as tool slippage and loss of control caused by unstable operation, ensuring user safety.

[0009] Optionally, the second detection unit includes a PCB board and a Hall sensor installed on the PCB board, the PCB board is installed on the main body, and the multiple Hall sensors correspond to the large torque mode and the small torque mode respectively. The trigger member moves relative to the PCB board so that the trigger member aligns and triggers the corresponding Hall sensor; each Hall sensor is preset with a different voltage value, and the Hall sensor is electrically connected to the control unit. After being triggered, the Hall sensor sends a corresponding voltage value to the control unit, and the control unit controls the output torque of the motor according to the obtained voltage value.

[0010] Multiple Hall effect sensors are used to correspond to the high-torque and low-torque modes of the electric drill, with preset voltage values ​​to accurately identify the user's selected operating mode. Based on the Hall effect, Hall effect sensors offer high sensitivity and stability, accurately converting the trigger's position information into an electrical signal and transmitting it to the control unit. This electrical signal transmission method is less susceptible to external interference, ensuring accurate and reliable operating mode determination. Furthermore, integrating multiple Hall effect sensors on the PCB reduces the number of components and space requirements, making the adjustment assembly more compact.

[0011] Optionally, the PCB board is annular, and multiple Hall sensors are arranged along the circumference of the PCB board. The adjustment assembly also includes a torsion cup, and the trigger member is fixedly installed in the torsion cup. The torsion cup is rotated to rotate the trigger member to align with different Hall sensors.

[0012] The ring-shaped PCB and torque cup allow users to select different torque modes simply by rotating the torque cup. This simple and intuitive operation eliminates the need for complex steps or additional tools, improving work efficiency. The ring-shaped PCB fully utilizes space, integrating multiple Hall sensors into a compact area. The fixed mounting of the torque cup and trigger ensures structural stability, increasing the reliability and service life of the drill.

[0013] Optionally, the triggering member is a magnet.

[0014] Magnets generate a stable magnetic field, enabling the Hall effect sensor to continuously and accurately sense position changes. Compared to some mechanical triggering methods, they eliminate the signal instability caused by mechanical wear and looseness. Furthermore, the magnet's structure as a trigger is relatively simple, eliminating the need for complex mechanical transmission mechanisms.

[0015] Optionally, the first detection part is an eddy current sensor, and at least one end of the auxiliary handle close to the main body is made of metal, so that the eddy current sensor is triggered when the auxiliary handle is installed on the main body.

[0016] Eddy-current sensors can accurately measure the relative displacement between a metal auxiliary handle and the probe end face. When the metal auxiliary handle approaches the sensor mounted on the main body, it alters the magnetic field around the sensor and triggers a detection signal, providing excellent stability.

[0017] Optionally, the eddy current sensor is installed in the main body and is non-contact with the auxiliary handle.

[0018] The non-contact structure avoids direct contact between the auxiliary handle and the eddy-current sensor, eliminating wear caused by frequent friction. In traditional contact detection, contact components gradually wear out with increased use, resulting in poor contact and unstable signals, affecting detection accuracy. Therefore, the service life of the eddy-current sensor and auxiliary handle in this application is extended, reducing wear-related failures and ensuring detection reliability.

[0019] Optionally, the auxiliary handle includes a first clamping arm and a second clamping arm, the first clamping arm and the second clamping arm are connected to form a clamping hole, and the clamping hole is clamped to the main body.

[0020] The snap-on structure offers the advantages of simplicity and fewer parts, reducing the possibility of malfunction. Furthermore, the snap-on connection is highly stable and can withstand certain external forces, ensuring that the auxiliary handle will not loosen or fall off easily during use, thus improving safety.

[0021] Optionally, the first clamping arm and the second clamping arm are both formed with recesses on one side facing the main body, and both sides of the main body are formed with outwardly protruding bosses, and the recesses are aligned one by one with the bosses and are interference fit.

[0022] The recessed and raised areas provide positioning, allowing operators to quickly align the clamping arm with the main body when installing the auxiliary handle, reducing installation difficulty and time. Accurate positioning also ensures the auxiliary handle is balanced after installation, improving operator comfort.

[0023] Optionally, the main body is provided with a first gripping portion, and the auxiliary handle is provided with a second gripping portion at one end away from the main body.

[0024] The first grip portion and the second grip portion cooperate to increase the contact points between the user and the electric drill, making the electric drill more stable during use, reducing shaking and deviation, and improving work accuracy and safety.

[0025] These features and advantages of the present invention will be further disclosed in the following detailed description and accompanying drawings. The preferred embodiments and means of the present invention will be fully illustrated in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of the present invention. Furthermore, although multiple features, elements, and components may be present in each of the following text and accompanying drawings, they may be labeled with different symbols or numbers for convenience, but all represent components with the same or similar structure or function. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 Schematic diagram of the structure of an embodiment of the present invention; Figure 2 is an exploded view; Figure 1 Figure 3 is a further exploded view; Figure 2 Figure 4 is a structure schematic view of the second detection part in the embodiment of the present application; Figure 5 is a sectional view. Figure 1

[0027] Wherein, 1, main body; 11, working head; 12, boss; 13, first holding part; 14, motor; 15, adjusting assembly; 151, trigger; 152, torsion cup; 2, auxiliary handle; 21, first clamping arm; 22, second clamping arm; 23, recess; 24, second holding part; 3, first detection part; 4, second detection part; 41, PCB board; 42, Hall sensor. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. Based on the embodiments in the embodiments, it is intended to explain the present application, and cannot be understood as a limitation of the present application.

[0029] In this specification, "one embodiment" or "an example" or "an example" means that the specific features, structures or characteristics described in connection with the embodiment itself can be included in at least one embodiment of the present patent disclosure. The occurrence of the phrase "in one embodiment" at various places in the specification does not necessarily mean the same embodiment.

[0030] Embodiments: As Figures 1 to 3 ​​​As shown, this embodiment provides an electric drill, comprising: a main body 1, the main body 1 including a working head 11 and a motor 14, the electric drill having a high torque mode and a low torque mode, when the electric drill is in the low torque mode, the motor 14 outputs a low torque to drive the working head 11 to rotate, and when the electric drill is in the high torque mode, the motor 14 outputs a high torque to drive the working head 11 to rotate; an auxiliary handle 2, which is detachably mounted to the main body 1; a first detection part 3, which is provided on the main body 1 and is used to detect whether the auxiliary handle 2 is installed on the main body 1; a second detection part 4, which is provided on the main body 1 and is used to detect the working mode of the electric drill; a control part, which controls the working state of the motor 14 according to the detection results of the first detection part 3 and the detection results of the second detection part 4; when the second detection part 4 detects that the electric drill is in the high torque mode, if the first detection part 3 detects that the auxiliary handle 2 is not installed on the main body 1, the motor 14 cannot be started; if the first detection part 3 detects that the auxiliary handle 2 is installed on the main body 1, the motor 14 can be started; when the second detection part 4 detects that the electric drill is in the low torque mode, the motor 14 can be started.

[0031] In this embodiment, the main body 1 includes a working head 11 and a motor 14. The electric drill has high-torque and low-torque modes. The motor 14 can output torque to drive the working head 11 according to different needs. In low-torque mode, the motor 14 only drives the working head 11 to rotate. In high-torque mode, the motor 14 can also achieve axial movement for impact operations. The motor 14 provides the necessary power for the working head 11 to operate. The auxiliary handle 2 is detachably mounted on the main body 1, providing the user with an additional grip point when operating the electric drill, enhancing stability and control. Especially when the electric drill is operating in high-torque mode, the auxiliary handle 2 helps the user control the tool, improving the safety of the electric drill. A first detection unit 3 is provided on the main body 1 and is used to detect whether the auxiliary handle 2 is attached to the main body 1 and transmit the detection result to the control unit. The second detection unit 4 detects the operating mode of the electric drill, that is, determines whether the electric drill is currently in high-torque mode or low-torque mode, and then transmits the detected mode information to the control unit. The control unit receives the detection results from the first and second detection units 3 and 4 and controls the operating state of the motor 14 based on these results, such as starting, stopping, or adjusting the operating mode.

[0032] When the second detection part 4 detects that the electric drill is in the small torque mode, the motor 14 can be started regardless of whether the first detection part 3 detects that the auxiliary handle 2 is installed, so that the working head 11 normally rotates in the small torque state to work. When the second detection part 4 detects that the electric drill is in the large torque mode, the control part makes different control actions according to the detection result of the first detection part 3. If the first detection part 3 detects that the auxiliary handle 2 is not installed on the main body 1, the control part controls the motor 14 to be unable to start, so as to prevent the instability of operation or safety accidents caused by the lack of the auxiliary handle 2. If the first detection part 3 detects that the auxiliary handle 2 is installed on the main body 1, the control part controls the motor 14 to be able to start, so that the working head 11 rotates or rotates while axially impacting in the large torque mode, thereby improving the safety of the electric drill. The first detection part 3 and the second detection part 4 work cooperatively to prevent the user from forgetting to install the auxiliary handle 2 when working in the large torque mode, avoid safety accidents such as tool falling and out of control caused by unstable operation, and protect the personal safety of the user. Moreover, the auxiliary handle 2 does not need to be forcibly installed in the small torque mode, thereby simplifying the operation process, improving the work efficiency, and being suitable for some scenes with low torque requirement, limited operation space or fast operation.

[0033] The electric drill has three working modes, namely, a screw gear, a drilling gear and an impact gear. The screw gear is a small torque mode, and the electric drill in the screw gear outputs a small torque to drive the working head 11 to rotate. The drilling gear and the impact gear are large torque modes. When the electric drill is in the drilling gear, the motor 14 outputs a large torque to drive the working head 11 to rotate. When the electric drill is in the impact gear, the motor 14 drives the working head 11 to rotate while the working head also moves axially to impact. The impact gear has various implementation manners, which are prior art and will not be described here. Specifically, the small torque generally refers to a torque less than 20 N·m, which is suitable for tasks such as screwing, and one-hand operation is usually sufficient, so the auxiliary handle 2 does not need to be installed. The large torque refers to a torque greater than 20 N·m, which is commonly used for drilling hard materials such as concrete and masonry. However, the increase of the torque may cause the working head 11 to be stuck or suddenly recoil, and may also cause the operator to lose control or be injured due to the reaction force. Therefore, the auxiliary handle 2 must be installed to stabilize the machine body when working.

[0034] The main body 1 is also provided with an adjusting assembly 15, which is installed on the main body 1 and can be operated to set the preset torque of the electric drill. The adjusting assembly 15 includes a trigger 151 for triggering the second detection part 4, and the control part judges the working mode of the electric drill according to the signal of the second detection part 4.

[0035] In this embodiment, the user operates the adjustment assembly 15 to set the preset torque for the electric drill. During operation, the trigger 151 of the adjustment assembly 15 triggers the second detection unit 4. Upon receiving the signal from the trigger 151, the second detection unit 4 transmits the information to the control unit. The control unit determines the operating mode of the electric drill based on this signal. In the high-torque mode, the first detection unit 3 detects whether the auxiliary handle 2 is installed. If not, the control unit disables the motor 14 to prevent safety accidents caused by unstable operation. If installed, the control unit controls the motor 14 to operate in the set high-torque mode. In the low-torque mode, the control unit controls the motor 14 to operate normally regardless of whether the auxiliary handle 2 is installed. The adjustment assembly 15 allows the user to set the preset torque for the electric drill, enabling the drill to accurately output torque according to different operating requirements, improving accuracy and quality, and being suitable for various work scenarios with different torque requirements. In addition, the coordinated operation of the trigger 151 of the adjustment assembly 15, the second detection unit 4, and the control unit enables the determination of the electric drill's operating mode, simplifying the operating process and improving work efficiency. Combined with the detection of the installation status of the auxiliary handle 2 by the first detection unit 3, the motor 14 is driven to work only after the auxiliary handle 2 is installed in the high torque mode, preventing safety accidents such as tool slipping and loss of control due to unstable operation, thereby ensuring the personal safety of the user.

[0036] like Figure 3 and Figure 4 As shown, the second detection part 4 includes a PCB board 41, which is installed on the main body 1. The PCB board 41 is provided with multiple Hall sensors 42 corresponding to the large torque mode and the small torque mode, respectively. The trigger member 151 moves relative to the PCB board 41 so that the trigger member 151 aligns with and triggers the corresponding Hall sensor 42; each Hall sensor 42 is preset with a different voltage value, and the Hall sensor 42 is electrically connected to the control part. After the Hall sensor 42 is triggered, it sends the corresponding voltage value to the control part, and the control part controls the output torque of the motor 14 according to the obtained voltage value.

[0037] In this embodiment, the user operates the adjustment assembly 15, causing the trigger member 151 to move relative to the PCB board 41. When the trigger member 151 moves to the position of the Hall sensor 42 corresponding to the high torque mode, the Hall sensor 42 is triggered. Similarly, when the trigger member 151 moves to the position of the Hall sensor 42 corresponding to the low torque mode, the corresponding Hall sensor 42 is turned on. Each Hall sensor 42 is preset with a different voltage value. When triggered by the trigger member 151, the Hall sensor 42 transmits its preset voltage value signal to the control unit. For example, the Hall sensor 42 corresponding to the high torque mode transmits a higher voltage value signal, while the Hall sensor 42 corresponding to the low torque mode transmits a lower voltage value signal. After receiving the voltage value signal from the Hall sensor 42, the control unit determines the operating mode of the electric drill based on preset logic. Simultaneously, the control unit also receives information on the installation status of the auxiliary handle 2 from the first detection unit 3. In high-torque mode, if the first detection unit 3 detects that the auxiliary handle 2 is not installed, the control unit controls the motor 14 to prevent it from starting. If it is installed, the control unit drives the motor 14 in high-torque mode based on the signal from the Hall effect sensor 42, causing the motor 14 to output high torque to rotate the work head 11 or simultaneously rotate the work head 11 and perform axial impact. In low-torque mode, regardless of whether the auxiliary handle 2 is installed, the control unit drives the motor 14 in low-torque mode. The motor 14 outputs low torque to drive the work head 11 in low-torque mode. Multiple Hall effect sensors 42 correspond to the high-torque and low-torque modes of the electric drill, and different voltage values ​​are preset to accurately identify the operating mode selected by the user. The Hall effect sensors 42 operate based on the Hall effect, offering high sensitivity and stability. They accurately convert the position information of the trigger element 151 into an electrical signal and transmit it to the control unit. This electrical signal transmission method is less susceptible to external interference, ensuring accurate and reliable operating mode determination. Furthermore, integrating multiple Hall effect sensors 42 on the PCB 41 reduces the number of components and space requirements, making the adjustment assembly 15 more compact.

[0038] The PCB board 41 is annular, and multiple Hall sensors 42 are arranged circumferentially along the PCB board 41. The adjustment component 15 also includes a torsion cup 152, and the trigger member 151 is fixedly installed in the torsion cup 152. By rotating the torsion cup 152, the trigger member 151 is rotated to align with different Hall sensors 42.

[0039] In this embodiment, the PCB 41 is annular, allowing multiple Hall sensors 42 to be evenly distributed along its circumference. This annular structure not only saves space but also facilitates the rotation of the torque cup 152, allowing the trigger 151 to smoothly align with different Hall sensors 42. The trigger 151 is fixedly mounted within the torque cup 152. Rotating the torque cup 152 drives the trigger 151, thereby changing the relative position between the trigger 151 and the Hall sensors 42, enabling the selection of different torque modes. The structure of the torque cup 152 is also convenient for the user to hold and operate. The annular PCB 41 and torque cup 152 allow the user to select different torque modes simply by rotating the torque cup 152. This simple and intuitive operation eliminates the need for complex steps or additional tools, thereby improving work efficiency. The annular PCB 41 fully utilizes space, integrating multiple Hall sensors 42 into a relatively small area. Furthermore, the fixed mounting of the torque cup 152 and trigger 151 ensures structural stability, improving the reliability and service life of the electric drill.

[0040] The triggering member 151 is a magnet.

[0041] In this embodiment, the trigger element 151 is a magnet and is fixedly mounted within the torque cup 152. When the user rotates the torque cup 152, the magnet rotates accordingly. Because the magnet has a magnetic field, as its position changes, Hall sensors 42 at different locations will sense the changes in the magnetic field. When the magnet rotates to align with a Hall sensor 42, the Hall sensor 42, based on the Hall effect, deflects the carriers within it under the influence of the magnetic field, generating a potential difference across the sensor, thereby activating it. Each Hall sensor 42 is preset with a different voltage value. When activated, it transmits a corresponding voltage value signal to the control unit. After receiving the signal, the control unit combines the auxiliary handle 2 installation status information transmitted by the first detection unit 3 to control the motor 14 to operate in the corresponding operating mode. The magnet generates a stable magnetic field, allowing the Hall sensor 42 to continuously and accurately sense its position changes. Compared with some mechanical triggering methods, the trigger element 151 does not suffer from unstable signal triggering due to mechanical wear, looseness, or other issues. Furthermore, the magnet as the trigger element 151 has a relatively simple structure and does not require a complex mechanical transmission mechanism.

[0042] In addition, for the specific structure and implementation of the motor 14 driving the working head 11 to rotate or rotate with axial movement impact, as well as other structures of the electric drill, please refer to the utility model patent with patent number CN215431664U. This structure is not the innovation of this application and has been fully disclosed in the prior art, so it will not be repeated here.

[0043] like Figure 5As shown, the first detection part 3 is an eddy current sensor, and at least one end of the auxiliary handle 2 close to the main body 1 is made of metal, so that the eddy current sensor is triggered when the auxiliary handle 2 is installed on the main body 1.

[0044] In this embodiment, an eddy current sensor can sense changes in the magnetic field and convert them into electrical signals for output. When the end of the auxiliary handle 2 closest to the main body 1 is made of metal, the metal will generate an electromagnetic response in the magnetic field. Specifically, when the auxiliary handle 2 is not attached to the main body 1, the eddy current sensor is in a relatively stable magnetic field and outputs a specific reference signal. However, when the auxiliary handle 2 is attached to the main body 1, the metal portion enters the eddy current sensor's detection range, generating an induced current within the auxiliary handle 2, which in turn changes the distribution and intensity of the surrounding magnetic field. Upon detecting the magnetic field change, the eddy current sensor's internal sensitive elements generate a corresponding electrical signal change, which is transmitted to the control unit as a signal indicating that the auxiliary handle 2 has been installed. In other embodiments, the auxiliary handle 2 can also be made entirely of metal. Eddy current sensors detect changes in the magnetic field. Dust, oil, and other contaminants generally do not significantly affect the magnetic field. As long as the metal auxiliary handle 2 is properly positioned close to the main body 1 and changes the magnetic field, a detection signal is triggered, resulting in relatively good stability.

[0045] In other embodiments, the first detection unit 3 may also be a microswitch having a plunger. The plunger is mounted on the main body 1 in a slightly protruding manner. When the auxiliary handle 2 is mounted on the main body 1, the plunger is pressed, and the microswitch is in the on state. When the auxiliary handle 2 is not mounted on the main body 1, the plunger is not pressed, and the microswitch is in the off state.

[0046] The eddy current sensor is installed in the main body 1 and is configured to be non-contact with the auxiliary handle 2 .

[0047] In this embodiment, the main body 1 includes a shell, the eddy current sensor is located inside the shell, and the auxiliary handle 2 is connected to the outside of the shell. Therefore, the eddy current sensor and the auxiliary handle 2 do not need to be in contact. It is sufficient for the auxiliary handle 2 to enter the alternating magnetic field generated by the eddy current sensor as long as one end of the auxiliary handle 2 close to the main body 1 enters the alternating magnetic field generated by the eddy current sensor. The non-contact structure avoids direct contact between the auxiliary handle 2 and the eddy current sensor, eliminating the wear problem caused by frequent friction. In traditional contact detection, as the number of uses increases, the contact parts will gradually wear out, resulting in poor contact, unstable signals, etc., affecting the accuracy of detection. Therefore, the service life of the eddy current sensor and the auxiliary handle 2 in this application is extended, the failure caused by wear is reduced, and the reliability of detection is guaranteed. It should be noted that the shell of the main body 1 in this embodiment is a non-metallic part, and the metal parts in the shell are not within the magnetic field range of the eddy current sensor, so they will not interfere with the accuracy of the eddy current sensor.

[0048] The auxiliary handle 2 includes a first clamping arm 21 and a second clamping arm 22 . The first clamping arm 21 and the second clamping arm 22 are connected to form a clamping hole, and the clamping hole is clamped to the main body 1 .

[0049] In this embodiment, the auxiliary handle 2 is composed of a first clamping arm 21 and a second clamping arm 22. Compared with an integrated handle, it is more flexible in manufacturing process and application. For example, different materials can be used to manufacture the two clamping arms to meet the performance requirements of different parts, such as one clamping arm focusing on strength and the other focusing on anti-slip performance. After the first clamping arm 21 and the second clamping arm 22 are docked, a clamping hole is formed, which is clamped to the main body 1 through the clamping hole. The clamping method has a simple structure and does not require complex connectors, which reduces manufacturing costs and assembly difficulty. At the same time, the shape and size of the clamping hole can be designed according to the appearance of the main body 1 to ensure the stability of the clamping.

[0050] The first clamping arm 21 and the second clamping arm 22 are both formed with recesses 23 on the side facing the main body 1 , and both sides of the main body 1 are formed with outwardly protruding bosses 12 , and the recesses 23 are aligned one by one with the bosses 12 and are interference fit.

[0051] In this embodiment, when installing the auxiliary handle 2, the operator aligns the first clamping arm 21 and the second clamping arm 22 with the sides of the main body 1, aligning the recess 23 with the boss 12. Then, a certain amount of pressure is applied to press the clamping arm toward the main body 1, causing the boss 12 to fit into the recess 23. Due to the interference fit between the recess 23 and the boss 12, the auxiliary handle 2 can be fixed to the main body 1. The recess 23 and the boss 12 provide a positioning function, allowing the operator to quickly align the clamping arm with the main body 1 when installing the auxiliary handle 2, reducing the difficulty and time of installation. Furthermore, accurate positioning ensures the balance of the auxiliary handle 2 after installation, improving the comfort of operation.

[0052] The main body 1 is provided with a first gripping portion 13 , and the auxiliary handle 2 is provided with a second gripping portion 24 at one end away from the main body 1 .

[0053] The first grip 13 and second grip 24 work together to increase the number of points of contact between the user and the drill, making it more stable during use, reducing shake and deviation, and improving accuracy and safety. The first grip 13 is located on the main body 1, making it easier for the user to hold the drill during normal operation. The second grip 24 is located at the end of the auxiliary handle 2 away from the main body 1, at a distance from the first grip 13, providing the user with different gripping options.

[0054] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims

1. An electric drill, characterized in that: include: The main body includes a working head and a motor. The electric drill has a high torque mode and a low torque mode. When the electric drill is in the low torque mode, the motor outputs a low torque to drive the working head to rotate. When the working head is in the high torque mode, the motor outputs a high torque to drive the working head to rotate or drive the working head to rotate while performing impact. an auxiliary handle detachably mounted to the main body; a first detection portion, which is provided on the main body and is used to detect whether the auxiliary handle is installed on the main body; a second detection portion, which is provided on the main body and is used to detect the working mode of the working head; a control unit configured to control an operating state of the motor according to a detection result of the first detection unit and a detection result of the second detection unit; When the second detection unit detects that the electric drill is in the high torque mode, if the first detection unit detects that the auxiliary handle is not installed on the main body, the motor cannot be started; if the first detection unit detects that the auxiliary handle is installed on the main body, the motor can be started normally; When the second detection unit detects that the electric drill is in the low torque mode, the motor can be started normally.

2. An electric drill according to claim 1, characterized in that: The main body is also provided with an adjustment component, which is installed on the main body and can be operated to set the preset torque of the electric drill; the adjustment component includes a triggering member for triggering the second detection part, and the control part determines the working mode of the electric drill according to the signal of the second detection part.

3. An electric drill according to claim 2, characterized in that: The second detection unit includes a PCB board and a Hall sensor mounted on the PCB board. The PCB board is mounted on the main body. The multiple Hall sensors correspond to the high torque mode and the low torque mode, respectively. The trigger member moves relative to the PCB board so that the trigger member aligns and triggers the corresponding Hall sensor. Each Hall sensor is preset with a different voltage value. The Hall sensor is electrically connected to the control unit. After being triggered, the Hall sensor sends the corresponding voltage value to the control unit. The control unit controls the output torque of the electric drill according to the obtained voltage value.

4. An electric drill according to claim 3, characterized in that: The PCB board is annular, and the multiple Hall sensors are arranged along the circumference of the PCB board. The adjustment assembly also includes a torsion cup, and the trigger member is fixedly installed in the torsion cup. The torsion cup is rotated to rotate the trigger member to align with different Hall sensors.

5. An electric drill according to claim 4, characterized in that: The triggering member is a magnetic steel.

6. The electric drill according to claim 1, characterized in that: The first detection part is an eddy current sensor, and at least one end of the auxiliary handle close to the main body is made of metal, so that the eddy current sensor is triggered when the auxiliary handle is installed on the main body.

7. An electric drill according to claim 6, characterized in that: The eddy current sensor is installed in the main body and is configured to be non-contact with the auxiliary handle.

8. The electric drill according to claim 1, characterized in that: The auxiliary handle includes a first clamping arm and a second clamping arm. The first clamping arm and the second clamping arm are connected to form a clamping hole. The clamping hole is clamped to the main body.

9. The electric drill according to claim 8, characterized in that: The first clamping arm and the second clamping arm are both formed with recesses on one side facing the main body, and both sides of the main body are formed with outwardly protruding bosses, and the recesses are aligned one by one with the bosses and are interference fit.

10. The electric drill according to claim 8, characterized in that: The main body is provided with a first gripping portion, and the auxiliary handle is provided with a second gripping portion at one end away from the main body.

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