Electric wrench

Abstract

The utility model provides an electric wrench, which relates to the technical field of hardware tools, and comprises a shell, one end of the shell is rotatably connected with a conversion head, the conversion head is rotatably connected with at least two sleeves, the axes of the at least two sleeves are parallel, a power mechanism and a telescopic shaft are arranged in the shell, and the telescopic shaft is connected with the conversion head. The power mechanism is used for driving the telescopic shaft to rotate around the axis of the telescopic shaft, the telescopic shaft can move in a telescopic mode in the axial direction relative to the conversion head, and the conversion head is used for rotating relative to the shell so that any sleeve and the telescopic shaft can be located on the same axis. The telescopic shaft can extend to be inserted into the sleeve and drive the sleeve to rotate relative to the conversion head. Through the rotatable adapter and the multiple sleeves, different types of fasteners can be adapted, the needed sleeves can be quickly selected and locked, the whole wrench head does not need to be manually replaced, the replacement time is greatly saved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware tools, in particular to an electric wrench. Background Art

[0002] A wrench is a commonly used mechanical tool, primarily used for installing and removing fasteners such as bolts, nuts, and screws. Common wrenches on the market include manual wrenches and electric wrenches. Ordinary manual wrenches have fixed openings, requiring different wrenches for installing and removing nuts of different sizes. This is not only inconvenient to carry, but the frequent replacement of wrenches during use also reduces work efficiency. Even adjustable spanners can be cumbersome to adjust, resulting in low work efficiency.

[0003] Although electric wrenches utilize electricity to tighten and loosen threaded fasteners such as bolts and nuts, combining the torque of a motor with the convenience of a wrench to significantly improve work efficiency, current electric wrenches on the market are still only suitable for single-use fasteners such as screws. For different types of fasteners, the wrench's head must be manually replaced, which is laborious and inefficient, reducing work efficiency. Utility Model Content

[0004] The problem solved by the utility model is: how to enable an electric wrench to be quickly switched to adapt to fasteners of various specifications without replacing the plate head, thereby improving work efficiency.

[0005] To solve the above problems, the present utility model provides an electric wrench, comprising: a shell, one end of the shell being rotatably connected to a conversion head, at least two sleeves being rotatably connected to the conversion head, the axes of the at least two sleeves being parallel, a power mechanism and a telescopic shaft being provided in the shell, the power mechanism being used to drive the telescopic shaft to rotate around its own axis, the telescopic shaft being able to telescopically move axially relative to the conversion head, the conversion head being used to rotate relative to the shell so that any one of the sleeves is located on the same axis as the telescopic shaft, the telescopic shaft being able to extend and insert into the sleeve and drive the sleeve to rotate relative to the conversion head.

[0006] Optionally, a telescopic mechanism is further included, wherein the telescopic shaft includes a sleeve and a drive shaft, one end of the sleeve is transmission-connected to the power mechanism, the power mechanism drives the sleeve to rotate, one end of the drive shaft is slidingly connected to the sleeve, the sleeve drives the drive shaft to rotate synchronously, and the telescopic mechanism is used to drive the drive shaft to slide back and forth axially relative to the sleeve.

[0007] Optionally, the cross-section of the drive shaft is square.

[0008] Optionally, the telescopic mechanism includes a rack and a telescopic gear, the rack is connected to the shell, a slot is provided on the outer periphery of the drive shaft, a bearing is sleeved in the slot, a mounting frame is connected to the outer periphery of the bearing, the mounting frame is connected to the telescopic gear at one end away from the drive shaft, the telescopic gear is meshed with the rack, and a first driving member is also provided on the mounting frame, which is used to drive the telescopic gear to rotate.

[0009] Optionally, a control button is provided on the housing, and the control button is electrically connected to the first driving member.

[0010] Optionally, the conversion head includes a mounting sleeve rotatably connected to one end of the shell, and the at least two sleeves are arranged on the mounting sleeve at circumferential intervals along the mounting sleeve, wherein at least one of the sleeves is connected to a conversion gear on a side close to the shell, and a driving gear is provided on a fixed sleeve at one end of the drive shaft away from the sliding sleeve, and a transmission assembly is arranged between the mounting sleeve and the shell, and the transmission assembly is respectively connected to the conversion gear and the driving gear.

[0011] Optionally, the transmission assembly includes a first gear and a second gear, the first gear and the second gear are coaxially connected, the first gear is meshed with the driving gear, and the second gear is meshed with the conversion gear.

[0012] Optionally, the conversion head also includes a protective shell and a protective cover, the protective shell is coaxially sleeved on the outer periphery of the mounting sleeve and the transmission assembly, and the end of the protective shell close to the shell is provided with a first avoidance hole allowing the drive shaft and the drive gear to pass through, the protective cover is connected to the end of the protective shell away from the shell, and the protective cover is provided with a second avoidance hole located on the same axis as the telescopic shaft.

[0013] Optionally, the power mechanism includes a second driving member, a reducer and a transmission wheel, the output end of the second driving member is connected to the driving wheel, one end of the reducer is coaxially connected to the driven wheel, the driving wheel is meshed with the driven wheel, the other end of the reducer is transmission-connected to the transmission wheel, and one end of the sleeve is coaxially connected to the transmission wheel.

[0014] Optionally, the reducer includes a first-stage planetary gear reduction assembly, a second-stage planetary gear reduction assembly and an output wheel, the first-stage planetary gear reduction assembly is transmission-connected to the driven wheel, the second-stage planetary gear reduction assembly is transmission-connected to the first-stage planetary gear reduction assembly, and the output wheel is transmission-connected to the second-stage planetary gear reduction assembly and the transmission wheel respectively.

[0015] The electric wrench of the present invention has the following advantages: the housing serves as the overall structural support and protects the power source. The adapter head is rotatably connected to one end of the housing, and multiple rotatable sleeves are mounted on it to accommodate different types of fasteners. A power mechanism is located within the housing, generating torque that is transmitted through the telescopic shaft. Once the power mechanism is activated, it drives the telescopic shaft to rotate. The telescopic shaft is capable of axial telescopic movement and can be adjusted to accommodate different sleeves. During use, the adapter head is rotated to align the desired sleeve with the telescopic shaft. The telescopic shaft can then be extended and inserted into the sleeve, establishing a power transmission path. Once the telescopic shaft and sleeve are engaged, the torque generated by the power mechanism is directly transmitted to the sleeve through the telescopic shaft, thereby tightening or loosening the fastener (such as a bolt or nut). To replace a different fastener, the telescopic shaft is retracted and removed from the used sleeve. The adapter head is then simply rotated to align another sleeve with the telescopic shaft and extend and insert the shaft, allowing the head to be quickly replaced. Manual removal and installation of the head are eliminated, significantly improving work efficiency. Therefore, the present application uses a rotatable conversion head and multiple sockets to quickly select and lock the required sockets without manually replacing the entire plate head, which greatly saves replacement time and improves work efficiency. In addition, the electric wrench is equipped with multiple sockets to adapt to different types of fasteners, such as bolts, nuts, etc., without the need to carry multiple different types of wrenches or plate heads, enhancing the versatility and portability of the tool, solving the problem of low efficiency of traditional electric wrenches when replacing plate heads, and significantly improving work efficiency and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of an implementation scheme of this application;

[0017] Figure 2 This is a schematic diagram of the internal structure of an embodiment of this application Figure 1 ;

[0018] Figure 3 This is a schematic diagram of the internal structure of an embodiment of this application Figure 2 ;

[0019] Figure 4 for Figure 3 Schematic cross-sectional view at the middle BB;

[0020] Figure 5 This is a schematic diagram of the internal structure of an embodiment of the present application Figure 3 ;

[0021] Figure 6 This is a schematic structural diagram of a protective shell according to an embodiment of the present application;

[0022] Figure 7This is a schematic diagram of the structure of the power mechanism of an implementation scheme of this application

[0023] Description of reference numerals:

[0024] 1. Housing; 11. Control button; 2. Conversion head; 21. Sleeve; 22. Mounting sleeve; 23. Conversion gear; 24. Transmission assembly; 241. First gear; 242. Second gear; 25. Protective shell; 251. First avoidance hole; 26. Protective cover; 261. Second avoidance hole; 3. Power mechanism; 31. Second driving member; 311. Driving wheel; 312. Driven wheel; 32. Reducer; 321. Primary planetary gear reduction assembly; 322. Secondary planetary gear reduction assembly; 323. Output wheel; 33. Transmission wheel; 4. Telescopic shaft; 41. Sleeve; 42. Drive shaft; 421. Slot; 422. Drive gear; 5. Telescopic mechanism; 51. Rack; 52. Telescopic gear; 53. Mounting bracket; 54. Bearing; 55. First driving member. DETAILED DESCRIPTION

[0025] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0026] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in this utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0027] It should be noted that the modifications of "one" and "multiple" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0028] like Figure 1 、 Figure 2As shown, an electric wrench provided by an embodiment of the present invention includes: a shell 1, one end of the shell 1 is rotatably connected to a conversion head 2, at least two sleeves 21 are rotatably connected to the conversion head 2, and the axes of at least two sleeves 21 are parallel. A power mechanism 3 and a telescopic shaft 4 are provided in the shell 1, the power mechanism 3 is used to drive the telescopic shaft 4 to rotate around its own axis, and the telescopic shaft 4 can be telescopically moved axially relative to the conversion head 2, and the conversion head 2 is used to rotate relative to the shell 1 so that any one of the sleeves 21 and the telescopic shaft 4 are located on the same axis, and the telescopic shaft 4 can be extended and inserted into the sleeve 21 and drive the sleeve 21 to rotate relative to the conversion head 2.

[0029] Specifically, the electric wrench is mainly composed of a shell 1, a conversion head 2, at least two sleeves 21, a power mechanism 3 and a telescopic shaft 4. The shell 1 serves as a support for the overall structure and a protective shell for the power source. The built-in power mechanism 3 (such as an electric motor) of the electric wrench provides rotational power, which is transmitted to the telescopic shaft 4 through the internal transmission mechanism, so that the telescopic shaft 4 can rotate at high speed. The telescopic shaft 4 is designed with an axial telescopic function, which can be extended or shortened along its axial direction within a certain range. It can flexibly cooperate with sleeves 21 of different lengths and can be extended and retracted when different sleeves 21 are replaced to avoid interference with the rotation of the conversion head 2. The conversion head 2 is rotatably connected to one end of the shell 1, and at least two (or more) sleeves 21 of different specifications are rotatably connected thereto, which can be used to adapt to fasteners of different sizes. When fasteners of specific specifications need to be disassembled and assembled, the required sleeve 21 is aligned with the telescopic shaft 4 by rotating the conversion head 2. At this point, the telescopic shaft 4 extends and directly inserts into the sleeve 21. Driven by the power mechanism 3, the telescopic shaft 4 transmits power, causing the sleeve 21 (and the fastener connected thereto) to rotate, completing the tightening or loosening operation. Furthermore, because the adapter 2 can be rotatably connected to multiple sleeves 21, and the telescopic shaft 4 has the function of telescopic insertion, the sleeve 21 adapted for different fasteners can be quickly replaced by simply rotating the adapter 2 and operating the telescopic shaft 4 to extend and retract, eliminating the need for manual removal and installation of the plate head, greatly improving work efficiency.

[0030] In this embodiment, by quickly switching the function of the sleeve 21, there is no need to frequently replace the entire electric plate head, which greatly saves the time of changing tools and improves work efficiency. And because a plurality of sleeves 21 of different specifications can be set on the conversion head 2, the electric wrench can easily handle various types of fasteners without carrying multiple tools, thereby enhancing the flexibility of use. Compared with traditional electric wrenches that require manual replacement of the plate head, the electric wrench of this embodiment can achieve the switching of the sleeve 21 through a simple rotation operation, which simplifies the operation steps, reduces the difficulty of operation, reduces the physical exertion when changing tools, avoids the damage or loss of tools that may be caused by frequent tool replacement, and improves the overall user experience.

[0031] Alternatively, as Figure 3 As shown, the electric wrench of this embodiment also includes a telescopic mechanism 5, the telescopic shaft 4 includes a sleeve 41 and a drive shaft 42, one end of the sleeve 41 is transmission-connected to the power mechanism 3, the power mechanism 3 drives the sleeve 41 to rotate, one end of the drive shaft 42 is slidingly connected in the sleeve 41, the sleeve 41 drives the drive shaft 42 to rotate synchronously, and the telescopic mechanism 5 is used to drive the drive shaft 42 to slide back and forth axially relative to the sleeve 41.

[0032] Specifically, the telescopic shaft 4 consists of a sleeve 41 and a drive shaft 42. One end of the sleeve 41 is connected to the power mechanism 3 (such as an electric motor) through a transmission device (such as a gear, a belt, etc.), so that the power mechanism 3 can drive the sleeve 41 to rotate. One end of the drive shaft 42 is slidably connected to the inside of the sleeve 41, so that the drive shaft 42 moves axially in the sleeve 41 while maintaining synchronous rotation with the sleeve 41, ensuring that power can be transmitted from the sleeve 41 to the drive shaft 42 without hindrance. The telescopic mechanism 5 (which may include a spring, a screw, a cam or other mechanical structure) can control the axial sliding of the drive shaft 42 in the sleeve 41. When the sleeve 21 needs to be changed, the telescopic mechanism 5 is activated, driving the drive shaft 42 to slide back and forth axially relative to the sleeve 41 until the drive shaft 42 is inserted into or exits the selected sleeve 21. As previously described, the desired sleeve 21 is selected by rotating the conversion head 2. Once the selected sleeve 21 is aligned with the drive shaft 42, the telescopic mechanism 5 automatically or manually adjusts the position of the drive shaft 42 so that it is inserted into the sleeve 21. Subsequently, the power mechanism 3 transmits the rotational power to the sleeve 21 through the sliding sleeve 41 and the drive shaft 42 to complete the operation of tightening or loosening the fastener.

[0033] In this optional embodiment, the telescopic mechanism 5 can accurately control the axial movement of the drive shaft 42, ensuring that the drive shaft 42 can be accurately inserted into or withdrawn from the sleeve 21, thereby improving the accuracy and reliability of the operation, simplifying the sleeve 21 switching process, reducing the user's operating steps and physical exertion, and improving the convenience and comfort of use. At the same time, it improves work efficiency and flexibility, allowing users to complete work tasks more quickly. Due to the sliding connection between the drive shaft 42 and the sleeve 41, the friction is small and the loss is low during the transmission process, which ensures the smooth transmission of power and improves work efficiency. In addition, the telescopic mechanism 5 is integrated into the telescopic shaft 4, making the structure of the entire electric wrench more compact and lightweight, easy to carry and operate. Moreover, by reducing the need to frequently replace the entire electric plate head, wear and damage to the tool is reduced, thereby extending the service life of the electric wrench.

[0034] Alternatively, as Figure 3 As shown, the drive shaft 42 has a square cross-section.

[0035] Specifically, the interior of the sleeve 41 is designed with a square hole or slot that matches the square drive shaft 42, allowing the drive shaft 42 to slide smoothly and rotate synchronously within the sleeve 41, thereby reducing relative motion between the two and reducing friction and wear. The drive shaft 42 can also be configured with a pentagonal or hexagonal cross-section, etc., and the sleeve 41 can be provided with a matching hole or slot to achieve synchronous rotation between the two.

[0036] In this alternative embodiment, the square cross-section of the drive shaft 42 reduces relative motion with the sliding sleeve 41 and the sleeve 21, reducing frictional losses and thereby improving power transmission efficiency. The square structure also enhances the torsional rigidity of the drive shaft 42, ensuring greater stability during rotation and reducing deviations caused by vibration or impact. Furthermore, the connection between the drive shaft 42 and the sleeve 21 is more precise and reliable, avoiding operational failures due to misalignment or slippage.

[0037] Alternatively, as Figure 3 、 Figure 4 As shown, combined with the attached Figure 1 The telescopic mechanism 5 includes a rack 51 and a telescopic gear 52. The rack 51 is connected to the housing 1. A slot 421 is provided on the outer periphery of the drive shaft 42. A bearing 54 is sleeved in the slot 421. The outer periphery of the bearing 54 is connected to a mounting bracket 53. The end of the mounting bracket 53 away from the drive shaft 42 is connected to the telescopic gear 52. The telescopic gear 52 is meshed with the rack 51. A first driving member 55 is also provided on the mounting bracket 53. The first driving member 55 is used to drive the telescopic gear 52 to rotate.

[0038] Specifically, the telescopic mechanism 5 primarily comprises a rack 51, a telescopic gear 52, a drive shaft 42, a slot 421, a bearing 54, a mounting bracket 53, and a first drive member 55. The rack 51 is fixedly attached to the housing 1 and serves as a fixed transmission track. The telescopic gear 52 is connected to the drive shaft 42 via the mounting bracket 53 and is capable of rotating under the drive of the first drive member 55. The outer periphery of the drive shaft 42 is provided with a slot 421, which is enclosed by a bearing 54. The outer periphery of the bearing 54 is further connected to the mounting bracket 53, allowing the mounting bracket 53 to slide relative to the drive shaft 42 while maintaining rotational freedom. The mounting bracket 53 is connected to the end of the mounting bracket 53 away from the drive shaft 42. The telescopic gear 52 meshes with the rack 51 fixed to the housing 1. When the first drive member 55 (e.g., a motor) is activated and drives the telescopic gear 52 to rotate, due to the meshing relationship between the gear and the rack 51, the telescopic gear 52 will perform linear motion (i.e., telescopic motion) along the direction of the rack 51 while maintaining a rotating state. The power provided by the first drive member 55 is transmitted to the telescopic gear 52 via the mounting bracket 53. The meshing action of the telescopic gear 52 and the rack 51 converts the power into linear motion, thereby driving the entire telescopic mechanism 5 to perform telescopic motion. The telescopic mechanism 5 simultaneously drives the drive shaft 42 to slide along the sliding sleeve 41, completing the telescopic movement of the drive shaft 42.

[0039] In this alternative embodiment, by securing the rack 51 to the housing 1 and connecting the telescopic gear 52 to the drive shaft 42 via a mounting bracket 53, a compact design is achieved, saving space. The meshing transmission between the gear and rack 51 provides stable and reliable transmission, ensuring smooth telescopic movement of the telescopic mechanism 5 during operation. By adjusting the output speed and direction of the first drive member 55, the telescopic mechanism 5's speed and direction can be flexibly controlled to meet diverse usage requirements.

[0040] Alternatively, as Figure 1 As shown, a control button 11 is provided on the housing 1 , and the control button 11 is electrically connected to the first driving member 55 .

[0041] Specifically, the control button 11 serves as an interface for user interaction and is used to receive user operation instructions. When the user presses or operates the control button 11, a series of electrical signals will be triggered. The control button 11 and the first drive member 55 are electrically connected through a circuit, allowing the electrical signal generated by the control button 11 to be directly transmitted to the first drive member 55. When the first drive member 55 receives the electrical signal from the control button 11, the first drive member 55 drives the telescopic gear 52 to rotate, and the telescopic gear 52 engages with the rack 51, driving the mounting bracket 53, the bearing 54 and the drive shaft 42 to move axially along the sleeve 41. The length of the axial movement is determined by the timing of the control button 11.

[0042] In this optional embodiment, the provision of the control button 11 allows the user to control the device or system with a simple press or operation, greatly improving operational convenience. Furthermore, the electrical connection between the control button 11 and the first drive member 55 enables signal transmission, ensuring accurate execution of commands, thereby improving control precision.

[0043] Alternatively, as Figure 5 As shown, the conversion head 2 includes a mounting sleeve 22 rotatably connected to one end of the shell 1, and at least two sleeves 21 are arranged on the mounting sleeve 22 at intervals along the circumference of the mounting sleeve 22, wherein at least one sleeve 21 is connected to a conversion gear 23 on the side close to the shell 1, and a driving gear 422 is fixed on the end of the drive shaft 42 away from the sliding sleeve 41, and a transmission assembly 24 is arranged between the mounting sleeve 22 and the shell 1, and the transmission assembly 24 is respectively connected to the conversion gear 23 and the driving gear 422.

[0044] Specifically, when an external power source (such as a motor) drives the drive shaft 42 to rotate, the drive gear 422 rotates accordingly. Since the transmission assembly 24 is meshed with the drive gear 422 and the conversion gear 23, the rotation of the drive gear 422 will drive the transmission assembly 24 to move, thereby transmitting the rotational force to the conversion gear 23. The rotation of the conversion gear 23 will drive the sleeve 21 connected thereto (and other components that may be connected thereto) to rotate, thereby rotating the required sleeve 21 so that the drive shaft 42 is located on the same axis, thereby completing the selection of the sleeve 21. If a different transmission ratio or direction of rotation is required, it can be achieved by adjusting the design of the transmission assembly 24 (such as the gear ratio) or changing the connection method between the conversion gear 23 and the sleeve 21.

[0045] In this optional embodiment, when the electric wrench is not in use, the telescopic mechanism 5 drives the drive shaft 42 to slide toward the sleeve 41, placing it in a neutral position. When a sleeve 21 is to be selected, the telescopic mechanism 5 first drives the drive shaft 42 to slide along the sleeve 41, away from the sleeve 41, causing the drive gear 422 on the drive shaft 42 to engage with the transmission assembly 24. The rotation of the drive gear 422 drives the transmission assembly 24, which in turn transmits the rotational force to the conversion gear 23. The rotation of the conversion gear 23 drives the connected sleeve 21 to rotate, causing the desired sleeve 21 to rotate until it is aligned with the drive shaft 42, completing the selection of the sleeve 21 (at this point, the telescopic shaft 4 is in the shift position). After the sleeve 21 is selected, the telescopic mechanism 5 drives the drive shaft 42 to slide further along the sleeve 41, away from the sleeve 41, inserting a portion of the drive shaft 42 into the sleeve 41. The rotation of the drive shaft 42 drives the sleeve 41 to rotate, allowing the fastener to be installed or removed (at this point, the telescopic shaft 4 is in the working position). In the present application, when the telescopic mechanism 5 drives the drive shaft 42 to slide axially, the power mechanism 3 stops driving the drive shaft 42 to rotate. When the drive shaft 42 is in the shift position or the working position, the power mechanism 3 drives the drive shaft 42 to rotate. In the present application, the sleeve 21 is provided with an insertion port at one end near the drive shaft 42. The cross-sectional shape of the insertion port of the sleeve 21 is adapted to the cross-sectional shape of the drive shaft 42, facilitating accurate insertion of the drive shaft 42 into the insertion port and driving the sleeve 21 to rotate synchronously.

[0046] Optionally, the transmission assembly 24 includes a first gear 241 and a second gear 242 . The first gear 241 and the second gear 242 are coaxially connected. The first gear 241 is meshed with the driving gear 422 , and the second gear 242 is meshed with the conversion gear 23 .

[0047] Specifically, the first gear 241 is meshed with the drive gear 422. When the drive shaft 42 rotates, the drive gear 422 rotates accordingly, and through meshing, it transmits power to the first gear 241. The second gear 242 is meshed with the conversion gear 23. The rotation of the first gear 241 drives the second gear 242 to rotate synchronously, which in turn transmits power to the conversion gear 23 through meshing. The conversion gear 23 rotates, driving the sleeve 21 connected to it (and any other components that may be connected to it) to rotate, thereby rotating the desired sleeve 21 so that it is on the same axis as the drive shaft 42, completing the selection of the sleeve 21.

[0048] In this optional embodiment, the coaxial connection between the first gear 241 and the second gear 242 enhances the overall stability of the transmission system, and helps reduce failures caused by loose or misaligned components when rotating at high speeds or bearing large loads.

[0049] Alternatively, as Figure 6 As shown, combined Figure 1 The conversion head 2 also includes a protective shell 25 and a protective cover 26. The protective shell 25 is coaxially sleeved on the outer periphery of the mounting sleeve 22 and the transmission assembly 24. The end of the protective shell 25 close to the shell 1 is provided with a first avoidance hole 251 that allows the drive shaft 42 and the drive gear 422 to pass through. The protective cover 26 is connected to the end of the protective shell 25 away from the shell 1. The protective cover 26 is provided with a second avoidance hole 261 that is located on the same axis as the telescopic shaft 4.

[0050] Specifically, the protective shell 25 is coaxially sleeved on the outer periphery of the mounting sleeve 22 and the transmission assembly 24 to form a closed or semi-closed space for protecting the internal transmission components from the influence of the external environment, such as dust, moisture, debris, etc. A first avoidance hole 251 is provided on the side of the protective shell 25 close to the shell 1, allowing the telescopic shaft 4 and the telescopic gear 52 to be smoothly extended or retracted when needed without being hindered by the protective shell 25. The protective cover 26 is connected to the end of the protective shell 25 away from the shell 1 to provide additional protection for the other end of the transmission assembly 24, further enhancing the sealing and safety of the entire conversion head 2. A second avoidance hole 261 is provided on the protective cover 26, which corresponds to one end of the sleeve 21 located on the same axis as the telescopic shaft 4, allowing one end of the sleeve 21 to be connected to the fastener to complete the disassembly and assembly of the fastener.

[0051] In this optional embodiment, protective shell 25 and protective cover 26 together provide a strong protective barrier for transmission assembly 24, effectively preventing dust, moisture, and debris from the external environment from entering the transmission components, thereby extending the service life of the transmission components and improving their operational stability. By properly designing the position and size of first avoidance hole 251 and second avoidance hole 261, it is possible to protect the transmission components while maintaining a good seal, preventing liquids or gases from penetrating into the transmission system.

[0052] Alternatively, as Figure 7 As shown, the power mechanism 3 includes a second driving member 31, a reducer 32 and a transmission wheel 33. The output end of the second driving member 31 is connected to the driving wheel 311, and one end of the reducer 32 is coaxially connected to the driven wheel 312. The driving wheel 311 is meshed with the driven wheel 312, and the other end of the reducer 32 is transmission-connected to the transmission wheel 33. One end of the sleeve 41 is coaxially connected to the transmission wheel 33.

[0053] Specifically, the second driving member 31 (such as a motor or an engine) serves as a power source, and its output end is connected to a driving wheel 311. When the second driving member 31 is started, it will drive the driving wheel 311 to rotate. One end of the reducer 32 is coaxially connected to a driven wheel 312, and the driving wheel 311 and the driven wheel 312 are connected by meshing. When the driving wheel 311 rotates, it will drive the driven wheel 312 to rotate, and the driven wheel 312 drives the reducer 32 to rotate. The reducer 32 rotates with the transmission wheel 33, and the transmission wheel 33 is used to drive the sleeve 41 and the drive shaft 42 to rotate, so as to disassemble and assemble the fastener. However, due to the action of the reducer 32, the speed of the transmission wheel 33 will decrease, and the output torque will increase. In this process, the reducer 32 achieves a reduction in speed and an increase in torque through the transmission ratio of the internal gear.

[0054] In this optional embodiment, through the deceleration effect of the reducer 32, the power mechanism 3 can stably convert high-speed, low-torque power into low-speed, high-torque power, thereby meeting the power requirements of the transmission wheel 33 and the telescopic shaft 4. The reducer 32 also serves to protect the second drive member 31. Because the reducer 32 can reduce the speed and increase the torque, it can reduce the load on the second drive member 31, reducing its wear and failure rate. By adjusting the transmission ratio of the reducer 32, the output characteristics of the power mechanism 3 can be flexibly adjusted to meet the requirements of different working conditions and loads, and meet the needs of fasteners in different occasions.

[0055] Optionally, the reducer 32 includes a first-stage planetary gear reduction assembly 321, a second-stage planetary gear reduction assembly 322 and an output wheel 323, the first-stage planetary gear reduction assembly 321 is transmission-connected to the driven wheel 312, the second-stage planetary gear reduction assembly 322 is transmission-connected to the first-stage planetary gear reduction assembly 321, and the output wheel 323 is transmission-connected to the second-stage planetary gear reduction assembly 322 and the transmission wheel 33 respectively.

[0056] Specifically, the first-stage planetary gear reduction assembly 321 is in transmission connection with the driven wheel 312. When the driven wheel 312 begins to rotate due to the driving force of the driving wheel 311, it drives the planetary gears in the first-stage planetary gear reduction assembly 321 to revolve and rotate around the center wheel (or sun wheel). Because the number of teeth on the planetary gears is less than that on the center wheel, the rotation speed of the planetary gears is reduced, achieving the first deceleration. The second-stage planetary gear reduction assembly 322 is in transmission connection with the first-stage planetary gear reduction assembly 321. The power after the first stage of deceleration is transmitted to the second-stage planetary gear reduction assembly 322, where it is further decelerated through the meshing of the planetary gears with the center wheel. Parameters such as the number of planetary gears and the gear ratio in the second-stage planetary gear reduction assembly 322 can be designed according to specific needs to achieve the desired reduction ratio. The output wheel 323 is in transmission connection with the second-stage planetary gear reduction assembly 322 and the transmission wheel 33, respectively. After two stages of planetary gear deceleration, the power is ultimately transmitted to the output wheel 323. The output wheel 323 transmits the decelerated power to the telescopic shaft 4.

[0057] In this optional embodiment, a larger reduction ratio can be achieved through a two-stage planetary gear reduction assembly. When the input speed is high, a lower speed and a larger torque can be output to meet various transmission requirements. Compared with other types of reducers 32, the planetary gear reducer 32 has the advantage of a compact structure. The integrated design of the two-stage planetary gear reduction assembly makes the entire reducer 32 smaller and lighter, making it easier to install and maintain. The planetary gear reducer 32 can be customized according to specific needs. By adjusting parameters such as the number of planetary gears and the gear ratio, different reduction ratios and transmission performances can be achieved, thereby adapting to various transmission requirements and application scenarios.

[0058] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An electric wrench, characterized in that: include: A housing (1) is provided, one end of the housing (1) being rotatably connected to a conversion head (2), the conversion head (2) being rotatably connected to at least two sleeves (21), the axes of the at least two sleeves (21) being parallel, a power mechanism (3) and a telescopic shaft (4) being provided in the housing (1), the power mechanism (3) being used to drive the telescopic shaft (4) to rotate around its own axis, the telescopic shaft (4) being capable of axial telescopic movement relative to the conversion head (2), the conversion head (2) being capable of rotating relative to the housing (1) so that any one of the sleeves (21) and the telescopic shaft (4) are located on the same axis, the telescopic shaft (4) being capable of extending and inserting into the sleeve (21) and driving the sleeve (21) to rotate relative to the conversion head (2).

2. The electric wrench according to claim 1, characterized in that: The invention also includes a telescopic mechanism (5), wherein the telescopic shaft (4) includes a sleeve (41) and a drive shaft (42), one end of the sleeve (41) is transmission-connected to the power mechanism (3), the power mechanism (3) drives the sleeve (41) to rotate, one end of the drive shaft (42) is slidingly connected in the sleeve (41), the sleeve (41) drives the drive shaft (42) to rotate synchronously, and the telescopic mechanism (5) is used to drive the drive shaft (42) to slide back and forth axially relative to the sleeve (41).

3. The electric wrench according to claim 2, characterized in that: The cross section of the driving shaft (42) is square.

4. The electric wrench according to claim 2, characterized in that: The telescopic mechanism (5) comprises a rack (51) and a telescopic gear (52), wherein the rack (51) is connected to the housing (1), a slot (421) is provided on the outer periphery of the drive shaft (42), a bearing (54) is sleeved in the slot (421), a mounting frame (53) is connected to the outer periphery of the bearing (54), an end of the mounting frame (53) away from the drive shaft (42) is connected to the telescopic gear (52), the telescopic gear (52) is meshed with the rack (51), and a first driving member (55) is further provided on the mounting frame (53), and the first driving member (55) is used to drive the telescopic gear (52) to rotate.

5. The electric wrench according to claim 4, characterized in that: A control button (11) is provided on the housing (1), and the control button (11) is electrically connected to the first driving member (55).

6. The electric wrench according to claim 4, characterized in that: The conversion head (2) comprises a mounting sleeve (22) rotatably connected to one end of the housing (1), the at least two sleeves (21) being arranged on the mounting sleeve (22) at intervals along the circumference of the mounting sleeve (22), wherein at least one of the sleeves (21) is connected to a conversion gear (23) on a side close to the housing (1), the fixed sleeve at one end of the drive shaft (42) away from the sliding sleeve (41) is provided with a drive gear (422), a transmission assembly (24) is arranged between the mounting sleeve (22) and the housing (1), and the transmission assembly (24) is respectively connected to the conversion gear (23) and the drive gear (422).

7. The electric wrench according to claim 6, characterized in that: The transmission assembly (24) comprises a first gear (241) and a second gear (242), wherein the first gear (241) and the second gear (242) are coaxially connected, the first gear (241) is meshedly connected with the driving gear (422), and the second gear (242) is meshedly connected with the conversion gear (23).

8. The electric wrench according to claim 6, characterized in that: The conversion head (2) further comprises a protective shell (25) and a protective cover (26); the protective shell (25) is coaxially sleeved on the outer periphery of the mounting sleeve (22) and the transmission assembly (24); an end of the protective shell (25) close to the housing (1) is provided with a first avoidance hole (251) for allowing the drive shaft (42) and the drive gear (422) to pass through; the protective cover (26) is connected to an end of the protective shell (25) away from the housing (1); and a second avoidance hole (261) is provided on the protective cover (26) which is coaxial with the telescopic shaft (4).

9. The electric wrench according to any one of claims 2 to 8, characterized in that: The power mechanism (3) comprises a second driving member (31), a speed reducer (32) and a transmission wheel (33); the output end of the second driving member (31) is connected to a driving wheel (311); one end of the speed reducer (32) is coaxially connected to a driven wheel (312); the driving wheel (311) is meshedly connected to the driven wheel (312); the other end of the speed reducer (32) is transmission-connected to the transmission wheel (33); and one end of the sliding sleeve (41) is coaxially connected to the transmission wheel (33).

10. The electric wrench according to claim 9, characterized in that: The reducer (32) comprises a primary planetary gear reduction assembly (321), a secondary planetary gear reduction assembly (322) and an output wheel (323); the primary planetary gear reduction assembly (321) is transmission-connected to the driven wheel (312); the secondary planetary gear reduction assembly (322) is transmission-connected to the primary planetary gear reduction assembly (321); and the output wheel (323) is transmission-connected to the secondary planetary gear reduction assembly (322) and the transmission wheel (33), respectively.

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