An electric screwdriver

Abstract

The utility model discloses a kind of electric screwdrivers, belong to electric tool technical field.The utility model adopts technical scheme, a kind of electric screwdriver, including shell, the outer side of shell upper end is equipped with guide groove;Tool bit mounting bracket, rotatingly connected in the inner cavity of shell upper end, the outer side wall of tool bit mounting bracket is fixedly connected with the sliding cooperation tool bit mounting seat of guide groove;Locking groove, along the outer side of tool bit mounting bracket and is equipped with several with equal interval;Locking mechanism, with locking groove cooperation, the tool bit mounting bracket is locked and limited;The utility model is rotated by the cooperation of locking groove and locking mechanism with the rotating connection of shell and tool bit mounting bracket, realizes tool bit mounting seat multi-angle adjustment and keeps stable locking, with the advantage of improving operation convenience and security.

Description

Technical Field

[0001] This utility model belongs to the field of power tool technology, specifically relating to an electric screwdriver. Background Technology

[0002] In modern industrial production, home repair, and various assembly operations, electric screwdrivers are widely used as efficient tightening and loosening tools. They greatly reduce the labor intensity of operators, significantly improve work efficiency, and have become an indispensable tool. However, some problems still need to be solved in the actual use of commonly available electric screwdrivers. Among them, the angle adjustment of the screwdriver bit mounting position is particularly prominent. Traditional electric screwdrivers mostly have fixed screwdriver bit mounting brackets, and the angle of the bit mounting base cannot be adjusted according to actual work needs. In some special working conditions, such as working in narrow spaces or needing to operate on screws from a specific tilt angle, operators often find it difficult to accurately align the screwdriver bit with the screw. This not only increases the difficulty of operation but may also lead to operational errors due to unsuitable angles, affecting the quality and efficiency of the work.

[0003] Meanwhile, the locking mechanisms of some existing electric screwdrivers with angle adjustment functions are not well-designed. Either the locking is not secure enough, leading to accidental rotation of the screwdriver head mounting bracket during operation, posing a safety hazard; or the unlocking and locking operations are cumbersome, requiring additional tools or multiple steps, severely impacting the convenience of angle adjustment and failing to meet users' needs for quick and efficient screwdriver head angle adjustment. Furthermore, existing locking mechanisms often lack clear position indicators, making it difficult for operators to accurately determine the current angle position of the screwdriver head mounting bracket.

[0004] Regarding power transmission, some electric screwdrivers have suboptimal transmission structure designs, resulting in low power transmission efficiency and significant power loss. Especially after adjusting the angle of the bit mount, traditional transmission structures often struggle to maintain stable power transmission. This not only affects the output torque and speed stability of the bit but may also shorten the tool's lifespan. Furthermore, the drive components and bit mounts of existing electric screwdrivers are not well-coordinated, which can impact the stability of power transmission after angle adjustments, further limiting the tool's performance.

[0005] In terms of ease of operation, the design of existing electric screwdriver adjustment devices also has shortcomings. Most products lack intuitive operation instructions, and the adjustment process is not user-friendly, requiring operators to try repeatedly to find the appropriate position. Furthermore, in poorly lit working environments, the lack of necessary lighting increases the difficulty of operation. In addition, functions such as torque adjustment and forward / reverse control are often scattered, hindering rapid operation. To address these issues, existing technology urgently needs improvement. Utility Model Content

[0006] This utility model provides an electric screwdriver to solve at least one of the above-mentioned technical problems.

[0007] The technical solution adopted in this utility model is as follows: An electric screwdriver includes a housing with a guide groove on the outer side of the upper end; a blade mounting bracket rotatably connected to the inner cavity at the upper end of the housing, with a blade mounting seat fixedly connected to the outer wall of the blade mounting bracket and slidingly engaging with the guide groove; a number of locking grooves evenly spaced along the outer circumference of the blade mounting bracket; and a locking mechanism that cooperates with the locking grooves to lock and limit the blade mounting bracket.

[0008] Furthermore, this application also proposes that the locking mechanism includes a sliding block slidably disposed inside the housing, an elastic element fixedly connected between the sliding block and the inner wall of the housing, and a locking tooth provided on the side wall of the sliding block to cooperate with the locking groove. The sliding block slides to give the locking tooth a locking position that cooperates with the locking groove and an unlocking position that separates the locking tooth from the locking groove.

[0009] Furthermore, this application also proposes that a press-adjustable switch is slidably connected to the outside of the housing, and the press-adjustable switch corresponds to the position of the sliding block.

[0010] Furthermore, this application also proposes that the locking teeth cooperate with a number of locking grooves at equal intervals on the outer circumference of the cutter head mounting bracket to enable the cutter head mounting base to have a number of working positions with different working angles, and that the outer side of the housing is provided with marking lines corresponding to the working position of each working angle.

[0011] Furthermore, this application also proposes that an output shaft is rotatably connected inside the cutter head mounting base, a cutter head mounting groove is fixedly connected to the upper end of the output shaft, a first bevel gear is fixedly connected to the lower end of the output shaft, a second bevel gear meshing with the first bevel gear is rotatably connected inside the housing, the second bevel gear rotates in the same direction as the cutter head mounting bracket, and a drive assembly for driving the first bevel gear to rotate through the second bevel gear.

[0012] Furthermore, this application also proposes a servo motor, wherein the output end of the servo motor is fixedly connected to a drive bevel gear, and the drive bevel gear meshes with a second bevel gear.

[0013] Furthermore, this application also proposes that the screwdriver bit mounting base is provided with a screwdriver bit mounting groove, the screwdriver bit mounting groove is an internal hexagonal groove structure for mounting screwdriver bits, and a lighting lamp is provided on the side of the screwdriver bit mounting base.

[0014] Furthermore, this application also proposes that the handle is provided with a forward switch and a reverse switch on the outside, the forward switch being used to control the cutter head mounting slot to rotate clockwise, and the reverse switch being used to control the cutter head mounting slot to rotate counterclockwise.

[0015] Furthermore, this application also proposes that the handle has a battery compartment inside, the battery compartment contains a storage battery, and the bottom of the handle has a charging port for charging the storage battery.

[0016] Furthermore, this application also proposes that the handle sidewall is provided with a torque adjustment switch for adjusting the output torque of the cutter head mounting slot.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by this utility model are as follows: 1. Tool-free rapid adjustment is achieved through a sliding fit structure. Existing locking mechanisms mostly use threaded fastening; this solution's elastic locking mechanism simplifies operation while ensuring stability. Existing single-locking-point designs are prone to gap wobble; this solution's circumferential multi-locking-groove structure enhances angular positioning accuracy. This application enables rapid switching and stable locking of the cutter head installation angle, eliminating blind spots in confined spaces compared to traditional tools. The synergistic effect of the locking mechanism and guide grooves ensures that adjustment requires no auxiliary tools, improving work efficiency. The multi-position locking design effectively prevents accidental cutter head deflection during operation, ensuring operational safety. This structural solution balances ease of adjustment and positional stability, adapting to different work scenarios.

[0018] 2. This solution utilizes the cooperation of an elastic element and a sliding block, requiring only a single press to unlock and automatically lock, avoiding efficiency losses caused by multiple steps. Simultaneously, the rigid fit between the locking teeth and the locking groove can withstand higher torque loads. This application solves the problems of cumbersome operation and insufficient locking stability in traditional electric screwdriver angle adjustment mechanisms, achieving quick one-handed unlocking and automatic reset locking, ensuring that the screwdriver head mounting bracket does not rotate unexpectedly during operation, while simplifying structural complexity.

[0019] 3. This solution achieves rapid one-handed operation through an external sliding push-button adjustment switch, requiring no tools and providing an intuitive action path. Existing technologies involve complex linkage structures between the adjustment and locking mechanisms; this solution simplifies the transmission path through a positional design, reducing the precision requirements for parts machining. It solves the problem of cumbersome angle adjustment operations in traditional electric screwdrivers, enabling rapid one-handed control of the screwdriver head mounting angle. Operation can be performed without interrupting work or changing tools, significantly improving adjustment efficiency in confined spaces. Furthermore, the precise positional correspondence between the sliding block and the push-button adjustment switch prevents jamming due to force misalignment during operation, enhancing the stability of the locking mechanism.

[0020] 4. The indexing and positioning structure is formed by circumferential multi-locking grooves and elastic locking teeth. Combined with the marking lines on the outside of the housing, it realizes rapid switching and precise positioning of multiple angles. This solves the problems of cumbersome angle adjustment steps and unclear work position indication in traditional tools. Operators can quickly select the required working angle by using the marking lines without repeated trial and error. At the same time, the indexing and locking structure ensures the mechanical stability of each work position and effectively improves the operating accuracy when working in narrow spaces.

[0021] 5. By using orthogonally arranged bevel gear sets, effective contact of the gear meshing surfaces can be maintained even when the cutter head mounting bracket rotates. This simplifies the transmission chain structure, reduces power loss, solves the problem of unstable power transmission during cutter head mounting bracket angle adjustment, ensures the continuity and reliability of the power transmission path at different working angles, improves transmission efficiency, and reduces the risk of failure due to structural complexity.

[0022] 6. This solution arranges a servo motor along the handle axis and employs an orthogonally meshing bevel gear set. This ensures efficient power transmission while maintaining a smooth handle outline, resulting in more even hand pressure distribution during operation. Furthermore, compared to parallel shaft gear transmission, bevel gear meshing can withstand greater axial loads, avoiding gear wear issues caused by frequent start-stop cycles. This application achieves an optimized axial layout of the power transmission path, preventing interference from transmission components when the operator grips the handle. Simultaneously, the orthogonal meshing design of the bevel gears effectively improves transmission stability under high torque conditions and extends the service life of critical components. Attached Figure Description

[0023] Figure 1 This is one of the structural schematic diagrams of a specific embodiment of the present utility model; Figure 2 This is one of the internal structural schematic diagrams of a specific embodiment of the present utility model; Figure 3 This is the second internal structure diagram of a specific embodiment of the present utility model; Figure 4This is the third internal structure schematic diagram of a specific embodiment of the present utility model; Figure 5 This utility model Figure 4 Enlarged view of section A in the middle; Figure 6 This is the second structural schematic diagram of a specific embodiment of the present utility model.

[0024] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0025] In the attached diagram: 1. Housing; 11. Guide groove; 111. Battery; 12. Marking line; 13. Handle; 2. Cutter head mounting bracket; 21. Cutter head mounting seat; 22. Cutter head mounting groove; 23. Lighting lamp; 221. First bevel gear; 201. Locking groove; 3. Press adjustment switch; 4. Sliding block; 41. Elastic element; 42. Clamping tooth; 5. Second bevel gear; 6. Drive bevel gear; 7. Servo motor; 8. Forward switch; 81. Reverse switch; 9. Torque adjustment switch; 10. Charging port. Detailed Implementation

[0026] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0028] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] Reference Figures 1 to 6 An electric screwdriver includes a housing 1 with a guide groove 11 on the outer side of the upper end; a screwdriver head mounting bracket 2 rotatably connected to the inner cavity of the upper end of the housing 1, and a screwdriver head mounting seat 21 that slides with the guide groove 11 fixedly connected to the outer wall of the screwdriver head mounting bracket 2; a number of locking grooves 201 evenly spaced along the outer circumference of the screwdriver head mounting bracket 2; and a locking mechanism that cooperates with the locking grooves 201 to lock and limit the screwdriver head mounting bracket 2.

[0032] Those skilled in the art will understand that, in the prior art, electric screwdrivers are widely used in industrial production and daily maintenance scenarios. Traditional tools have fixed-angle tool holders, making them unsuitable for operation in confined spaces or at special angles. Some adjustable-angle products suffer from insufficient stability in the locking mechanism or complex operating procedures, affecting work efficiency and safety. For example, when repairing electronic equipment, operators often encounter difficulties in screw removal because the tool tip cannot be tilted, requiring repeated adjustments to the tool position.

[0033] To address the aforementioned issues, the research and development focused on achieving convenient adjustment and reliable locking of the cutter head mounting angle. Analysis of the structural defects of existing locking mechanisms revealed that a sliding fit and elastic reset mechanism could balance adjustment flexibility and locking stability. Based on this, the design approach shifted to incorporating a guide groove 11 into the housing 1 as an adjustment path, which, together with circumferentially distributed locking grooves 201, enables multi-angle positioning. Simultaneously, an elastic locking mechanism is employed to prevent accidental displacement.

[0034] The housing 1 refers to the main structure enclosing the internal components, which can be injection molded from engineering plastics, with an internal cavity to accommodate the transmission components. The guide groove 11 is a linear track on the surface of the housing 1, which can be formed by milling or injection molding, and is used to guide the sliding trajectory of the cutter head mounting base 21. The cutter head mounting bracket 2 is the rotating component that carries the cutter head, and can be a metal bushing structure. The locking groove 201 is a positioning recess distributed on the outer periphery of the cutter head mounting bracket 2, which can be rectangular grooves distributed at equal angles, used to mechanically engage with the locking mechanism. The locking mechanism is the component that restricts the rotation of the cutter head mounting bracket 2, and can be a spring-loaded slider structure, with the position fixed by the engagement of the locking teeth 42 with the locking groove 201.

[0035] Specifically, when the cutter head mounting base 21 slides along the guide groove 11, it drives the cutter head mounting bracket 2 to rotate. When a predetermined angle is reached, the locking mechanism's locking teeth 42 engage with the corresponding locking groove 201 to complete positioning. This structure allows the operator to adjust the angle by pushing the cutter head mounting base 21 with one hand, and the locking mechanism automatically resets to maintain a stable position. The circumferentially distributed locking grooves 201 provide multiple fixed positions, ensuring reliable support for the cutter head at different angles.

[0036] This solution achieves tool-free, rapid adjustment through a sliding fit structure. Existing locking mechanisms mostly use threaded fastening; this solution's elastic locking mechanism simplifies operation while ensuring stability. Existing single-locking-point designs are prone to gap wobble; this solution's circumferential multi-locking-groove 201 structure enhances angular positioning accuracy.

[0037] Through the above technical solution, this application achieves rapid switching and stable locking of the cutter head installation angle, eliminating the blind spots of traditional tools in confined spaces. The synergistic effect of the locking mechanism and the guide groove 11 ensures that the adjustment process requires no auxiliary tools, improving work efficiency. The multi-position locking design effectively prevents accidental deflection of the cutter head during operation, ensuring operational safety. This structural solution balances ease of adjustment and positional stability, adapting to the needs of different work scenarios.

[0038] As one specific implementation of the locking mechanism in this application, refer to Figure 4 and Figure 5The locking mechanism includes a sliding block 4 slidably disposed inside the housing 1. An elastic element 41 is fixedly connected between the sliding block 4 and the inner wall of the housing 1. The side wall of the sliding block 4 is provided with a locking tooth 42 that cooperates with the locking groove 201. The sliding block 4 slides so that the locking tooth 42 has a locking position that cooperates with the locking groove 201 and an unlocking position that separates the locking tooth 42 from the locking groove 201.

[0039] The sliding block 4 is a rigid component that can move along a specific path inside the housing 1. It can be made of metal or high-strength plastic and is used to support the locking teeth 42 and achieve station switching. The elastic element 41 is a component that provides a restoring force, which can be implemented by a helical spring. It is used to automatically reset the sliding block 4 to the locking position when no external force is applied. The locking teeth 42 are protruding structures that match the shape of the locking groove 201. They can be designed with a trapezoidal or rectangular cross section and are used to embed in the locking groove 201 to restrict the rotation of the tool head mounting bracket 2. The locking position refers to the state in which the locking teeth 42 are fully embedded in the locking groove 201. It is maintained by the elastic force of the elastic element 41 and is used to fix the angle of the tool head mounting bracket 2. The unlocking position refers to the state in which the sliding block 4 is pushed by an external force to disengage the locking teeth 42 from the locking groove 201. It is triggered by pressing the adjustment switch 3 and is used to release the angle lock of the tool head mounting bracket 2.

[0040] Specifically, when the angle of the cutter head mounting bracket 2 needs to be adjusted, pressing the adjustment switch 3 pushes the sliding block 4 to move towards the unlocking position against the elastic force of the elastic element 41. At this time, the locking teeth 42 completely disengage from the locking groove 201, and the cutter head mounting bracket 2 can rotate freely. After releasing the adjustment switch 3, the elastic element 41 pushes the sliding block 4 back to the locking position, and the locking teeth 42 re-engage into the corresponding locking groove 201 to complete the angle locking. During this process, the elastic element 41 always provides a stable restoring force to ensure mechanical stability in the locked state.

[0041] Compared to existing technologies, traditional locking mechanisms require manual tightening of bolts or manipulation of complex latches for fixation, which is cumbersome and carries the risk of loosening. This solution, through the cooperation of the elastic element 41 and the sliding block 4, allows for unlocking and automatic locking with a single press, avoiding efficiency losses caused by multiple steps. Simultaneously, the rigid fit between the locking teeth 42 and the locking groove 201 can withstand higher torque loads. This application solves the problems of cumbersome operation and insufficient locking stability in traditional electric screwdriver angle adjustment mechanisms, achieving quick one-handed unlocking and automatic reset locking, ensuring that the screwdriver head mounting bracket 2 does not rotate unexpectedly during operation, while simplifying structural complexity.

[0042] As a preferred example of the above-described implementation method, refer to Figures 1-6 A press adjustment switch 3 is slidably connected to the outside of the housing 1, and the press adjustment switch 3 corresponds to the position of the sliding block 4.

[0043] The push-button adjustment switch 3 is an operating component located outside the housing 1 for triggering the switching of the locking mechanism. Its function is to directly control the displacement of the sliding block 4 through external manual operation. The position of the sliding block 4 is spatially aligned with the installation position of the push-button adjustment switch 3 and the movement trajectory of the sliding block 4 within the housing 1. This can be achieved through the guide groove 11 or the limiting structure inside the housing 1. Its function is to ensure that the sliding direction of the push-button adjustment switch 3 is consistent with the moving direction of the sliding block 4, thereby achieving effective force transmission.

[0044] Specifically, when the angle of the cutter head mounting bracket 2 needs to be adjusted, the operator slides and presses the adjustment switch 3 along the outside of the housing 1. This switch, through mechanical contact, pushes the sliding block 4 to overcome the elastic force of the elastic element 41 and move it to the unlocking position. At this time, the locking tooth 42 disengages from the locking groove 201, and the cutter head mounting bracket 2 can rotate freely to the target angle. After releasing the adjustment switch 3, the elastic element 41 pushes the sliding block 4 back to the locking position, and the locking tooth 42 re-engages into the corresponding locking groove 201 to complete the limiting.

[0045] This solution achieves quick one-handed operation through an external sliding push-button adjustment switch 3, requiring no tools and providing an intuitive action path. Existing technologies have complex linkage structures between the adjustment and locking mechanisms; this solution simplifies the transmission path and reduces the precision requirements for parts machining through a position-corresponding design.

[0046] This application solves the problem of cumbersome angle adjustment operation in traditional electric screwdrivers, realizing one-handed and rapid control of the angle switching of the screwdriver head mounting bracket 2. Operation can be performed without interrupting work or changing tools, significantly improving adjustment efficiency when working in confined spaces. At the same time, the positional correspondence between the sliding block 4 and the pressing adjustment switch 3 avoids jamming caused by force deviation during operation, enhancing the working stability of the locking mechanism.

[0047] As a preferred design for the push-to-adjust switch 3, refer to Figures 1-3 The surface of the press-adjustment switch 3 is decorated with press-adjustment symbols to indicate the button function. This design serves to remind users of the operating method and enhances the user experience.

[0048] As a preferred embodiment of this application, refer to Figures 2-5 The locking teeth 42 cooperate with several locking grooves 201 at different positions that are equally spaced on the outer circumference of the cutter head mounting bracket 2 so that the cutter head mounting base 21 has several working positions with different working angles. The outer side of the housing 1 is provided with marking lines 12 corresponding to the working position of each working angle.

[0049] When the adjusting switch 3 is pressed, pushing the sliding block 4 out of the current locking groove 201, the cutter head mounting bracket 2 can rotate freely around the axis of the housing 1. The operator rotates the cutter head mounting base 21 to the target angle according to the work requirements and then releases the adjusting switch. The elastic element 41 pushes the sliding block 4 back to its original position, causing the locking teeth 42 to engage with the corresponding locking groove 201. At this time, the marking line 12 on the surface of the housing 1 is aligned with the current working angle value. For example, when the marking line 12 points to 30 degrees, it indicates that the cutter head mounting base 21 is in a 30-degree tilt working state.

[0050] This solution uses a circumferential multi-locking groove 201 in conjunction with an elastic locking tooth 42 to form an indexing and positioning structure. Combined with the marking line 12 on the outside of the housing 1, it achieves rapid switching and precise positioning of multiple angles, solving the problems of cumbersome angle adjustment steps and unclear work position indication in traditional tools. Operators can quickly select the required working angle through the marking line 12 without repeated trial and error. At the same time, the indexing and locking structure ensures the mechanical stability of each work position and effectively improves the operating accuracy when working in narrow spaces.

[0051] As one specific embodiment of this application, refer to Figure 2 and Figure 3 The output shaft is rotatably connected inside the cutter head mounting base 21. The upper end of the output shaft is fixedly connected to the cutter head mounting groove 22, and the lower end of the output shaft is fixedly connected to the first bevel gear 221. The housing 1 is rotatably connected to the second bevel gear 5, which meshes with the first bevel gear 221. The second bevel gear 5 rotates in the same direction as the cutter head mounting bracket 2. The housing also includes a drive assembly for driving the first bevel gear 221 to rotate through the second bevel gear 5.

[0052] The output shaft is the shaft component used to transmit rotational power. It can be made of high-hardness alloy steel, with its two ends connected to the tool head mounting part and the first bevel gear 221, respectively, to transmit power from the drive assembly to the tool head mounting part. The first bevel gear 221 is the gear component that forms an orthogonal mesh with the second bevel gear 5. It can be machined using a carburizing and quenching process, converting the rotational motion of the second bevel gear 5 into the axial rotation of the output shaft through conical surface meshing. The second bevel gear 5 is the driven gear that meshes with the first bevel gear 221, and can be mounted on a support bearing coaxial with the tool head mounting bracket 2 to ensure meshing stability with the first bevel gear 221, thereby maintaining the consistency of the power transmission direction. The drive assembly is the device that provides rotational power. It can be a structure of a servo motor 7 and a driving bevel gear 6. Power input is achieved through the meshing of the driving bevel gear 6 and the second bevel gear 5, ensuring that the rotation of the tool head mounting bracket 2 does not affect the power transmission path.

[0053] When the drive assembly is started, power is transmitted to the second bevel gear 5 through the driving bevel gear 6. The second bevel gear 5 drives the first bevel gear 221, which meshes with it, to rotate, thereby driving the output shaft and the cutter head mounting part to tighten or loosen screws. Since the second bevel gear 5 rotates in the same direction as the cutter head mounting bracket 2, the meshing relationship between the second bevel gear 5 and the first bevel gear 221 remains unchanged when the angle of the cutter head mounting bracket 2 is adjusted, avoiding transmission failure or power interruption due to angle adjustment.

[0054] This solution uses orthogonally arranged bevel gear sets to maintain effective contact of the gear meshing surfaces even when the cutter head mounting bracket 2 rotates. It also simplifies the transmission chain structure, reduces power loss, solves the problem of unstable power transmission during the angle adjustment of the cutter head mounting bracket 2, ensures the continuity and reliability of the power transmission path at different working angles, improves transmission efficiency, and reduces the risk of failure due to structural complexity.

[0055] As a specific implementation of the driver component, refer to Figure 2 and Figure 3 The housing 1 has a handle 13 at the lower part of the upper end. The drive assembly includes a servo motor 7 installed in the handle 13. The output end of the servo motor 7 is fixedly connected to an active bevel gear 6, which meshes with a second bevel gear 5.

[0056] The servo motor 7 is a drive device that can control the speed and direction of rotation via electrical signals. Specifically, it can be implemented using a brushless DC motor with an encoder. Its function is to provide precisely adjustable power output to the tool head mounting section. The driving bevel gear 6 refers to a bevel gear structure that is fixed coaxially with the output shaft of the servo motor 7. Its function is to transmit the rotational power of the servo motor 7 to the second bevel gear 5.

[0057] The servo motor 7 is mounted inside the handle 13 near the bottom, with its output shaft extending along the axis of the handle 13. The driving bevel gear 6 is fixed to the output shaft of the servo motor 7 via a keyway and forms an orthogonal meshing relationship with the second bevel gear 5. When the servo motor 7 starts, the driving bevel gear 6 drives the second bevel gear 5 to rotate. The second bevel gear 5, through a transmission component coaxially connected to it, drives the first bevel gear 221 to rotate, ultimately transmitting power to the cutter head mounting section. This layout allows the power transmission path to extend along the axis of the handle 13, effectively reducing the lateral space occupied by the transmission components.

[0058] This design arranges servo motors 7 along the axis of handle 13 and uses orthogonally meshing bevel gear sets. This ensures efficient power transmission while maintaining a smooth outer contour of handle 13, resulting in more even hand pressure distribution during operation. Furthermore, compared to parallel shaft gear transmission, bevel gear meshing can withstand greater axial loads, avoiding gear wear issues caused by frequent starts and stops.

[0059] Through the above technical solution, this application achieves an axially optimized layout of the power transmission path, so that the operator will not be interfered with by the transmission components when holding the handle 13. At the same time, the orthogonal meshing design of the bevel gear effectively improves the transmission stability under high torque conditions and extends the service life of key components.

[0060] As a preferred embodiment of the cutter head mounting base 21, refer to Figures 1-6 The screwdriver mounting base 21 is provided with a screwdriver mounting groove 22, which is an internal hexagonal groove structure for mounting screwdriver heads. A lighting lamp 23 is provided on the side of the screwdriver mounting base 21.

[0061] The screwdriver bit mounting slot 22 is a receiving structure for fixing the screwdriver bit. It can be implemented using a hexagonal groove structure, with its inner wall forming an interference fit with a standard hexagonal screwdriver bit. This structure achieves rapid positioning and prevents the screwdriver bit from falling off through geometric constraints. The internal hexagonal groove structure refers to a groove with a regular hexagonal cross-section, which can be formed using high-precision CNC machining, and its dimensions can be adapted to different sizes of screwdriver bit shanks. This structure achieves uniform force distribution from multiple angles through symmetrical geometric characteristics. The lighting lamp 23 is an electronic component that provides a local light source. This component is side-mounted to avoid obstructing the working area and forms an integrated layout with the screwdriver bit mounting base 21.

[0062] The internal hexagonal structure of the cutter head mounting slot 22 enables quick insertion and removal of the cutter head through a standardized interface. During operation, the cutter head shank automatically completes circumferential positioning after being inserted into the groove. The lighting lamp 23 is controlled by an independent circuit, providing continuous illumination to the working surface whenever the cutter head mounting base 21 rotates to any position. When the cutter head mounting base 21 slides along the guide groove 11 to adjust its angle, the internal hexagonal groove structure always maintains stable contact with the cutter head, preventing contact surface displacement due to angle changes.

[0063] Compared to existing technologies, traditional electric screwdrivers often use single-point clamping or spring clips to fix the screwdriver head, resulting in uneven clamping force distribution and causing the head to wobble. The internal hexagonal groove structure, however, distributes the torsional load evenly across six contact surfaces, significantly improving the working stability of the screwdriver head. Existing technologies rarely integrate lighting into the screwdriver head mounting base 21, requiring operators to use external light sources in low-light conditions, leading to reduced work efficiency.

[0064] This application achieves a gapless fit between the cutter head and the mounting base, effectively eliminating cutter head deflection during operation. At the same time, it eliminates blind spots through side lighting, significantly improving cutter head positioning accuracy and operational safety in confined spaces or low-light environments.

[0065] As a preferred embodiment of this application, refer to Figures 1-4 as well as Figure 6The handle 13 is provided with a forward switch 8 and a reverse switch 81 on the outside. The forward switch 8 is used to control the cutter head mounting groove 22 to rotate clockwise, and the reverse switch 81 is used to control the cutter head mounting groove 22 to rotate counterclockwise.

[0066] Forward switch 8 and reverse switch 81 are control elements that trigger the clockwise rotation of the cutter head mounting part. Specifically, they can be implemented using push-button switches. Their internal circuits are connected to the servo motor 7 control module, and drive the motor to run in the forward or reverse direction through signal transmission.

[0067] The forward and reverse switches 8 and 81 on the outside of the handle 13 are independently configured. Pressing the forward switch 8 triggers the servo motor 7 to output forward rotational power. This power is transmitted sequentially through the drive bevel gear 6 and the second bevel gear 5 to the first bevel gear 221, ultimately driving the cutter head mounting part to rotate clockwise. Pressing the reverse switch 81 triggers the servo motor 7 to output reverse rotational power. The meshing relationship between the drive bevel gear 6 and the second bevel gear 5 remains unchanged, but the gear rotation direction is reversed, thus driving the cutter head mounting part to rotate counterclockwise. This design allows operators to quickly switch the cutter head rotation direction with just one hand, without needing to adjust the tool grip angle when tightening or loosening screws.

[0068] This solution physically separates the direction switching function by independently setting the forward and reverse switch 81, eliminating the complexity of the operation logic, while retaining the direct power transmission path between the servo motor 7 and the bevel gear set, avoiding power loss caused by introducing additional mechanical structures due to direction switching.

[0069] This application enables quick switching of the blade rotation direction with one hand, reducing operation time and improving the continuity of screw tightening or disassembly operations; the independent switch design reduces the probability of misoperation, ensures stable power transmission path, and avoids gear wear or motor overheating problems caused by frequent direction switching.

[0070] In addition, the handle 13 has a battery compartment inside, which contains a storage battery 111, and the bottom of the handle 13 has a charging port 10 for charging the storage battery 111.

[0071] The handle 13 has a battery compartment inside formed by injection molding to match the shape of the battery 111. The battery 111 is fixed inside the compartment and connected to the drive assembly via wires. A charging port 10 is located at the bottom of the handle 13. The charging port 10 contains a charging management circuit, and an external power source supplies power to the battery 111 through the charging port 10. When the battery 111 is low on power, the charging cable can be inserted into the charging port 10 to start charging. After charging is complete, the external power source can be disconnected for wireless operation.

[0072] This solution, through the combination of a built-in battery 111 and a charging port 10, eliminates the device's reliance on an external power source and avoids frequent battery removal, thus ensuring continuous power supply for the electric screwdriver and resolving the problem of work interruptions caused by power limitations in traditional tools. The built-in charging structure reduces battery replacement frequency, and the standardized design of the charging port 10 allows it to be compatible with various charging devices, improving the tool's applicability in environments without external power. Furthermore, the handle 13 has a torque adjustment switch 9 on its side wall for adjusting the output torque of the cutter head mounting slot 22.

[0073] The torque adjustment switch 9 refers to an adjustment device that changes the output shaft torque mechanically or electronically. Specifically, it can be implemented using a rotary potentiometer or a digital encoder, controlling the current of the drive motor by changing the resistance value or outputting pulse signals. Output torque refers to the torque value applied to the screw by the cutter head mounting part during rotation, which can be adjusted in stages or continuously by adjusting the input voltage or current of the drive motor.

[0074] Specifically, the torque adjustment switch 9 is electrically connected to the drive circuit inside the handle 13. When the user rotates the switch, its internal resistance value or signal output changes, and the drive circuit adjusts the output power of the servo motor 7 according to the received signal. For example, when the switch is rotated to the low torque setting, the drive circuit reduces the motor current, thus reducing the maximum torque output of the cutter head mounting section; when the switch is rotated to the high torque setting, the drive circuit increases the current to increase the upper limit of torque. Furthermore, the switch can be equipped with a multi-level positioning structure, each level corresponding to a preset torque threshold, thereby achieving precise torque control under different working conditions.

[0075] This solution integrates an electronic torque adjustment switch 9 on the outside of the handle 13, allowing for quick switching of torque levels without interrupting operation, while avoiding component wear caused by mechanical adjustment. This application solves the problem of excessive torque causing screw stripping or workpiece damage when tightening screws of different sizes with an electric screwdriver. Operators can quickly match the output torque according to the screw material and size, ensuring operational safety and avoiding the tedious operation of repeatedly disassembling and adjusting the tool.

[0076] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0077] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0078] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. An electric screwdriver, characterized in that, Includes a housing (1), and a guide groove (11) is provided on the outer side of the upper end of the housing (1); The cutter head mounting bracket (2) is rotatably connected to the inner cavity at the upper end of the housing (1), and the outer wall of the cutter head mounting bracket (2) is fixedly connected to the cutter head mounting seat (21) which slides with the guide groove (11). Locking grooves (201) are provided at equal intervals along the outer circumference of the cutter head mounting bracket (2); The locking mechanism, in conjunction with the locking groove (201), locks and limits the cutter head mounting bracket (2).

2. The electric screwdriver according to claim 1, characterized in that, The locking mechanism includes a sliding block (4) slidably disposed inside the housing (1). An elastic element (41) is fixedly connected between the sliding block (4) and the inner wall of the housing (1). The side wall of the sliding block (4) is provided with a locking tooth (42) that cooperates with the locking groove (201). The sliding block (4) slides so that the locking tooth (42) has a locking position that cooperates with the locking groove (201) and an unlocking position that separates the locking tooth (42) from the locking groove (201).

3. An electric screwdriver according to claim 2, characterized in that, A press adjustment switch (3) is slidably connected to the outside of the housing (1), and the press adjustment switch (3) corresponds to the position of the sliding block (4).

4. An electric screwdriver according to claim 3, characterized in that, The locking teeth (42) cooperate with a number of locking grooves (201) at equal intervals on the outer circumference of the cutter head mounting bracket (2) so that the cutter head mounting base (21) has a number of working positions with different working angles. The outer side of the housing (1) is provided with marking lines (12) corresponding to the working position of each working angle.

5. An electric screwdriver according to claim 1, characterized in that, The output shaft is rotatably connected inside the cutter head mounting base (21). The upper end of the output shaft is fixedly connected to the cutter head mounting groove (22). The lower end of the output shaft is fixedly connected to the first bevel gear (221). The housing (1) is rotatably connected to the second bevel gear (5) that meshes with the first bevel gear (221). The second bevel gear (5) rotates in the same direction as the cutter head mounting bracket (2). The housing (1) also includes a drive assembly for driving the first bevel gear (221) to rotate through the second bevel gear (5).

6. An electric screwdriver according to claim 5, characterized in that, The housing (1) has a handle (13) at the lower part of its upper end. The drive assembly includes a servo motor (7) disposed in the handle (13). The output end of the servo motor (7) is fixedly connected to an active bevel gear (6), which meshes with a second bevel gear (5).

7. An electric screwdriver according to claim 2, characterized in that, The screwdriver mounting base (21) is provided with a screwdriver mounting groove (22), which is an internal hexagonal groove structure for mounting screwdriver heads. A lighting lamp (23) is provided on the side of the screwdriver mounting base (21).

8. An electric screwdriver according to claim 6, characterized in that, The handle (13) is provided with a forward switch (8) and a reverse switch (81) on the outside. The forward switch (8) is used to control the cutter head mounting groove (22) to rotate clockwise, and the reverse switch (81) is used to control the cutter head mounting groove (22) to rotate counterclockwise.

9. An electric screwdriver according to claim 6, characterized in that, The handle (13) has a battery compartment inside, and a storage battery (111) is provided inside the battery compartment. The bottom of the handle (13) has a charging port (10) for charging the storage battery (111).

10. An electric screwdriver according to claim 6, characterized in that, The handle (13) has a torque adjustment switch (9) on its side wall for adjusting the output torque of the cutter head mounting slot (22).

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