Driving mechanism of electric tool and quick-release electric ratchet wrench

Abstract

The utility model discloses a drive mechanism and quick detach type electric ratchet wrench of electric tool belong to power tool field, solve the single function problem of prior art, solve the technical scheme that this problem includes the drive motor of casing and being located in the casing, drive motor is connected with the clutch element, and the clutch element includes the first connecting part for the work head of outside can be connected to transmit or interrupt power with the clutch, and the second connecting part for the work head of outside detachably connected to continue transmitting power. The utility model realizes one machine multi -use.

Description

Technical Field

[0001] This utility model relates to the field of power tools, and in particular to a drive mechanism for an electric tool and a quick-release electric ratchet wrench. Background Technology

[0002] Existing power tools, such as the electric screwdriver disclosed in patent document CN210757422U and the electric ratchet wrench disclosed in patent document CN108453657A, while capable of achieving their specific functions, generally suffer from limited functionality and application scenarios. When faced with complex tasks involving both screws and nuts, users often need to carry and switch between multiple specialized tools, increasing their burden and reducing efficiency. Furthermore, these tools typically use fixed and single power output interfaces, resulting in poor versatility and difficulty in adapting to diverse accessories, thus limiting functional expansion. Utility Model Content

[0003] The purpose of this invention is to provide a drive mechanism for power tools that solves the problem of limited functionality in existing technologies, enabling multiple uses in one machine.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a drive mechanism for an electric tool, comprising a housing and a drive motor disposed within the housing, wherein the drive motor is connected to a clutch element, the clutch element comprising a first connecting part for disengagingly connecting to an external working head to transmit or interrupt power, and a second connecting part for detachably connecting to an external working head to continuously transmit power.

[0005] By adopting the above technical solution, this utility model has the following advantages: By setting the first and second connecting parts of the clutch element, functional integration and expansion are achieved. The first connecting part can be detachably connected to an external working head, suitable for operations requiring precise control of power on / off, such as precision tightening, enabling on-demand power transmission and immediate interruption. The second connecting part provides a non-detachable connection, ensuring continuous and stable power transmission, suitable for continuous operation scenarios such as rapid assembly and disassembly. This significantly enhances the versatility of the drive mechanism, providing a foundation for adapting to diverse accessories and expanding application functions. Users do not need to replace the drive mechanism of the power tool; they can meet different operational needs by switching working heads or modes, achieving efficient and convenient multi-purpose functionality.

[0006] Furthermore, the first connecting part consists of clutch teeth arranged along the circumferential direction of the clutch element, used for unidirectional torque transmission or bidirectional torque transmission.

[0007] By employing the aforementioned technical solution, torque can be efficiently transmitted through the meshing of the clutch teeth with the corresponding teeth on the working head. Depending on the shape design of the clutch teeth, such as trapezoidal, rectangular, or specific inclined planes, or by changing the lifting angle of the clutch teeth, unidirectional or bidirectional torque transmission can be flexibly achieved. The unidirectional design is suitable for occasions where only forward tightening / untilting is required, while the bidirectional design can reliably transmit forward and reverse torque, meeting the dual needs of precise tightening and loosening.

[0008] Furthermore, the second connecting portion includes a bit hole for accommodating a bit; or, the second connecting portion is a threaded section provided on the clutch element; or, the second connecting portion is a bayonet provided at the end of the clutch element; or, the second connecting portion is a magnetic adsorption surface provided on the clutch element.

[0009] By adopting the aforementioned technical solution and the diversified structural design, the second connection part can be flexibly adapted to different types and specifications of external working heads, which significantly enhances the versatility and ease of operation of the tool while ensuring continuous and stable power transmission.

[0010] Furthermore, the clutch element extends beyond the front end of the housing, and the first connecting part and the second connecting part are both located at the same end of the clutch element extending beyond the housing.

[0011] By adopting the aforementioned technical solution, the two functional interfaces are concentrated at the front end of the drive mechanism, resulting in a compact structure and high space utilization. Users can conveniently switch between different connection modes of the working head in the same operating position without adjusting the grip posture or tool direction, which significantly improves the intuitiveness and convenience of operation.

[0012] Another objective of this utility model is to provide a quick-release electric ratchet wrench, including a working head and a drive mechanism of an electric tool as described in any of the above technical solutions. The drive mechanism and the working head of the electric tool are detachably connected. The drive mechanism and the working head of the electric tool are respectively provided with a locking component and a limiting component. When the drive mechanism and the working head of the electric tool are connected, the locking component cooperates with the limiting component to lock the working head onto the drive mechanism of the electric tool.

[0013] Through the above technical solution, the drive mechanism and the working head are detachably connected, and a reliable locking is achieved through the cooperation of the locking component and the limiting part. This not only ensures the stability of the connection and circumferential anti-rotation, but also supports the quick disassembly and assembly of the working head, which significantly improves the work efficiency. Users can easily replace the working head to adapt to different tasks and give full play to the multi-purpose effect of the drive mechanism.

[0014] Furthermore, the drive mechanism of the power tool and the working head are threadedly connected.

[0015] With the above technical solution, users can complete the installation and disassembly by simply rotating the device. The operation is intuitive and convenient, requiring no additional tools.

[0016] Furthermore, the drive mechanism of the power tool is provided with a movable notch, and the limiting part includes a limiting notch provided on the working head. The limiting notch extends axially and has a sidewall for cooperating with a locking member. The locking member is slidably disposed in the movable notch and can slide into the limiting notch to limit the relative rotation between the drive mechanism of the power tool and the working head.

[0017] With the above technical solution, when the drive mechanism and the working head are tightened by the threaded connection, the locking component slides into the limiting notch of the working head, and its end abuts against the side wall of the limiting notch, thereby effectively restricting the relative rotation between the two, ensuring a stable connection between the drive mechanism and the working head, and reducing the possibility of the drive mechanism and the working head disengaging at will.

[0018] Furthermore, a first reset member is provided within the movable notch, which acts on the locking component, giving the locking component a tendency to slide toward the limiting notch.

[0019] Through the above technical solution, the locking component, pushed by the first reset component, can automatically and smoothly slide into the limiting notch on the working head, completing the circumferential anti-rotation locking without additional user operation, greatly improving the convenience of installation and operational efficiency. At the same time, the continuous elastic force provided by the first reset component ensures a tight fit between the locking component and the side wall of the limiting notch, thereby preventing accidental separation due to vibration or impact, significantly enhancing the reliability and stability of the connection.

[0020] Furthermore, the drive mechanism of the power tool is provided with a movable through hole, the limiting part includes a one-way pawl disposed on the working head in the circumferential direction, and the locking component is provided with limiting teeth that can engage with the one-way pawl to limit the relative rotation between the drive mechanism of the power tool and the working head. The locking component is slidably disposed in the movable through hole, and a second reset member is provided in the movable through hole. The second reset member acts on the locking component, so that the locking component has a tendency to engage the limiting teeth and the one-way pawl.

[0021] With the above technical solution, when the drive mechanism is connected to the working head, the locking component, under the action of the second reset component, automatically engages its limiting teeth with the one-way pawl on the working head, effectively limiting the relative rotation of the two outside the allowable direction of the pawl, thereby preventing the two from accidentally disengaging due to vibration or impact as much as possible. As the tightening process proceeds, the elasticity of the second reset component continuously increases, and the limiting teeth of the locking component are more firmly pressed onto the one-way pawl of the working head, making the connection between the two more reliable.

[0022] Furthermore, an elastic sealing ring is provided at the axial connection between the working head and the drive mechanism of the power tool, which is used to generate an elastic preload at the connection between the working head and the drive mechanism of the power tool to achieve axial preload.

[0023] Through the above technical solution, the elastic sealing ring is compressed and deformed, generating a continuous elastic preload. This preload acts directly on the axial connection, effectively enhancing the axial preload effect of the connection, significantly improving the tightness and anti-loosening ability of the connection, especially resisting vibration and impact loads, and preventing power transmission failure or abnormal noise caused by loosening as much as possible. At the same time, the compressed sealing ring fills the gap at the axial connection, achieving a reliable seal and preventing dust, moisture or debris from entering the drive mechanism as much as possible. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the drive mechanism of the power tool according to Embodiment 1 of this utility model;

[0026] Figure 2 This is a schematic diagram of the drive mechanism of the power tool according to Embodiment 1 of the present invention from another perspective.

[0027] Figure 3 This is an exploded view of the drive mechanism of the power tool according to Embodiment 1 of this utility model;

[0028] Figure 4 This is a schematic diagram of the clutch element according to Embodiment 1 of this utility model;

[0029] Figure 5 This is a schematic diagram of another clutch element according to Embodiment 1 of this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the quick-release electric ratchet wrench according to Embodiment 2 of this utility model;

[0031] Figure 7 This is an exploded view of the quick-release electric ratchet wrench according to Embodiment 2 of this utility model;

[0032] Figure 8 This is a partial structural diagram of the quick-release electric ratchet wrench, Embodiment 2 of this utility model;

[0033] Figure 9 This is a schematic diagram of the structure of the quick-release electric ratchet wrench according to Embodiment 3 of this utility model;

[0034] Figure 10 This is an exploded view of the quick-release electric ratchet wrench according to Embodiment 3 of this utility model;

[0035] In the diagram, 10 is the housing; 101 is the left housing; 102 is the right housing; 11 is the drive motor; 12 is the gearbox; 13 is the switch; 14 is the control board; 15 is the battery; 16 is the clutch element; 161 is the first connecting part; 1611 is the first clutch surface; 1612 is the second clutch surface; 1613 is the protrusion; 1614 is the groove; 162 is the second connecting part; 17 is the movable notch; 18 is the movable through hole; 20 is the locking component; 21 is the first reset component; 22 is the second reset component; 23 is the elastic sealing ring; 30 is the working head; 31 is the housing; 32 is the drive shaft; 321 is the bevel gear; 322 is the step part; 33 is the ratchet; 34 is the transmission gear; 35 is the third elastic element; 36 is the clutch joint; and 37 is the limiting part. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0037] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein.

[0038] It should be understood that in the various embodiments of this utility model, the number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this utility model.

[0039] It should be understood that in this invention, "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product or device.

[0040] It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, or Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Contains X, Y, and Z", "Contains X, Y, and Z" means that all three X, Y, and Z are contained; "Contains X, Y, or Z" means that one of X, Y, and Z is contained; "Contains X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are contained.

[0041] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0042] like Figures 1 to 5 As shown, the present invention provides a drive mechanism for an electric tool, including a housing 10 and a drive motor 11 disposed within the housing 10. The drive motor 11 is connected to a clutch element 16. The clutch element 16 includes a first connection portion 161 for disengagingly connecting to an external working head 30 to transmit or interrupt power, and a second connection portion 162 for detachably connecting to the external working head 30 to continuously transmit power.

[0043] By setting the first connecting part 161 and the second connecting part 162 of the clutch element 16, functional integration and expansion are achieved. The first connecting part 161 can be detachably connected to the external working head 30, suitable for operations such as precision tightening that require precise control of power on / off, realizing on-demand power transmission and instant interruption; the second connecting part 162 provides a non-detachable connection, ensuring continuous and stable power transmission, suitable for continuous operation scenarios such as rapid assembly and disassembly. This design significantly enhances the versatility of the drive mechanism, providing a foundation for adapting to diverse accessories and expanding application functions. Users do not need to replace the drive mechanism of the power tool; they can meet different operation needs by switching the working head 30 or mode, achieving efficient and convenient multi-purpose functionality.

[0044] It should be noted that the housing 10 also houses a control board 14, a gearbox 12, a switch 13, and a battery 15. The control board 14, switch 13, and drive motor 11 are all electrically connected to the battery 15. The clutch element 16 and the drive motor 11 are connected via the gearbox 12. The gearbox 12 increases the output torque of the drive motor 11 by using a small gear to drive a large gear. The housing 10 includes a detachably connected left housing 101 and a right housing 102.

[0045] The first connecting part 161 consists of clutch teeth arranged along the circumference of the clutch element 16, used for unidirectional torque transmission. The clutch teeth mesh with the mating teeth on the working head 30, enabling efficient torque transmission. Depending on the shape of the clutch teeth—for example, trapezoidal, rectangular, or a specific bevel—or by changing the lifting angle of the clutch teeth, unidirectional or bidirectional torque transmission can be flexibly achieved. The unidirectional design is suitable for applications requiring only forward tightening / untiling.

[0046] Specifically, the clutch teeth include multiple protrusions 1613 protruding along the axial direction of the clutch element 16, with adjacent protrusions 1613 forming a groove 1614. The two sides of the groove 1614 are respectively the first clutch surface 1611 and the second clutch surface 1612. The first clutch surface 1611 is inclined outwards relative to the bottom of the groove 1614 (i.e., the included angle is greater than 90°), forming a guide slope; the second clutch surface 1612 is inclined inwards relative to the bottom of the groove 1614 (i.e., the included angle is less than 90°), forming a load-bearing support surface. When the drive motor 11 drives the first connecting part 161 to rotate along the direction of the first clutch surface 1611, the mating teeth on the working head 30 contact the first clutch surface 1611. During the relative motion, a thrust is generated along the first clutch surface 1611, pushing the mating teeth of the working head 30 to move axially, achieving disengagement and entering an idle state.

[0047] When the drive motor 11 drives the first connecting part 161 to rotate along the direction of the second clutch surface 1612, the mating teeth on the working head 30 quickly slide into the groove 1614 and form surface contact with the second clutch surface 1612. At this time, the two tooth surfaces are wedged together, the torque is reliably transmitted, and the power engagement is achieved.

[0048] The connecting part of the external working head 30 can be a bit, and the second connecting part 162 includes a bit hole for accommodating the bit, so as to realize quick installation and quick removal of the bit.

[0049] Understandably, to improve the reliability of bit installation, the inner wall of the bit hole can be equipped with an elastic clamp. The elastic clamp can firmly fix the bit through elastic force and prevent the bit from falling off during operation. Of course, the inner wall of the bit hole can also be equipped with a magnetic component. The magnetic component can also use the attraction force to the bit to facilitate quick loading and unloading of the bit and ensure the stability of power transmission. It is especially suitable for scenarios where different sizes of bits are frequently changed.

[0050] The clutch element 16 extends beyond the front end of the housing 10. The first connecting portion 161 and the second connecting portion 162 are both located at the same end of the clutch element 16 extending beyond the housing 10. This design results in a compact structure and high space utilization. Users can conveniently switch between different connection modes of the working head 30 from the same operating position without adjusting their grip or tool orientation, significantly improving the intuitiveness and convenience of operation. The first connecting portion 161 is located around the outer ring of the second connecting portion 162.

[0051] It should be noted that the external working head 30 can be a screwdriver bit or a ratchet wrench 33.

[0052] Understandably, in other embodiments, the first connecting part 161 is used for bidirectional torque transmission, transmitting forward and reverse torque to meet the dual requirements of precise tightening and loosening. At this time, the drive motor 11 can rotate forward and reverse, and the switch 13 controls the forward and reverse rotation of the drive motor 11.

[0053] Understandably, in other embodiments, the second connecting part is a threaded section provided on the clutch element, which cooperates with the external working head through a threaded connection. It has the characteristics of firm connection and good sealing performance, and can stably transmit power in high-load operation, avoiding loosening as much as possible. It is suitable for working conditions with high requirements for connection strength.

[0054] Understandably, in other embodiments, the second connecting part is a bayonet set at the end of the clutch element. The bayonet structure can realize the quick engagement and disengagement of the external working head. The operation is simple and efficient, which can greatly shorten the time for changing the working head and improve the work efficiency. It is often used in fast operation scenarios that require frequent switching of working heads.

[0055] Understandably, in other embodiments, the second connecting part is a magnetic adsorption surface provided on the clutch element. With the help of magnetic force, the magnetic external working head can be quickly adsorbed. The loading and unloading process does not require complicated operation, saving time and effort, and can ensure a certain connection stability, which is suitable for the needs of light operation or temporary quick connection.

[0056] Example 2

[0057] like Figures 6 to 8 As shown, in this embodiment, a quick-release electric ratchet wrench is provided, including a working head 30 and a power tool drive mechanism as described in any of the above technical solutions. The power tool drive mechanism and the working head 30 are detachably connected. The power tool drive mechanism and the working head 30 are respectively provided with a locking component 20 and a limiting part 37. When the power tool drive mechanism and the working head 30 are connected, the locking component 20 and the limiting part 37 cooperate to lock the working head 30 onto the power tool drive mechanism.

[0058] The drive mechanism and the working head 30 are detachably connected and reliably locked by the cooperation of the locking component 20 and the limiting part 37. This ensures the stability of the connection and circumferential anti-rotation, while also enabling quick assembly and disassembly of the working head 30, significantly improving work efficiency. Users can easily replace the working head 30 with one that is suitable for different tasks, giving full play to the multi-purpose effect of the drive mechanism.

[0059] Specifically, the drive mechanism and working head of the power tool are connected by a 30mm thread. Users can easily install and remove the tool by simply rotating it; the operation is intuitive and convenient, requiring no additional tools.

[0060] Because the threads between the drive mechanism and the working head 30 of the power tool can easily loosen due to vibration or impact, in this application, the drive mechanism of the power tool is provided with a movable notch 17, and the limiting part 37 includes a limiting notch provided on the working head 30. The limiting notch extends axially and has a sidewall for engaging with the locking member 20. The locking member 20 is slidably disposed in the movable notch 17 and can slide into the limiting notch to limit the relative rotation between the drive mechanism and the working head 30 of the power tool.

[0061] When the drive mechanism and the working head 30 are tightened together by the threaded connection, the locking component 20 slides into the limiting notch of the working head 30, and its end abuts against the side wall of the limiting notch, thereby effectively restricting the relative rotation between the two, ensuring a stable connection between the drive mechanism of the power tool and the working head 30, and reducing the possibility of the drive mechanism of the power tool and the working head 30 disengaging at will.

[0062] For ease of operation, the locking component 20 protrudes at least partially from the drive mechanism of the power tool. The locking component 20 is provided with an indicator mark to show the unlocking direction, so that the user can clearly understand the unlocking method.

[0063] Furthermore, a first reset member 21 is provided within the movable notch 17. The first reset member 21 acts on the locking member 20, giving the locking member 20 a tendency to slide towards the limiting notch. This allows for circumferential anti-rotation locking without additional user intervention, greatly improving installation convenience and operational efficiency. Simultaneously, the continuous elastic force provided by the first reset member 21 ensures a tight fit between the locking member 20 and the sidewall of the limiting notch, thereby preventing accidental separation due to vibration or impact and significantly enhancing the reliability and stability of the connection.

[0064] It should be noted that the working head 30 includes a housing 31, a drive shaft 32 disposed within the housing 31, a third elastic element 35, a clutch connector 36, a ratchet 33, a pawl, and a drive gear 34. The clutch connector 36 is sleeved on one end of the drive shaft 32, and a stepped portion 322 is provided on the drive shaft 32. The third elastic element 35 is disposed between the stepped portion 322 and the clutch connector 36, so that the clutch connector 36 keeps abutting against the first connecting portion 161. The drive gear 34 is fixedly connected to the ratchet 33. A bevel gear 321 that meshes with the drive gear 34 is provided at the other end of the drive shaft 32 to drive the ratchet 33 to rotate. This abandons the traditional eccentric push block structure, effectively avoiding the dead point problem and greatly improving operating efficiency. The ratchet 33 cooperates with the pawl to limit the ratchet 33 to rotate only in one direction. The housing 31 and the housing 10 of the power tool's drive mechanism are provided with intermeshing threads. A movable notch 17 is provided on the housing 10, and a limiting notch is provided on the housing 31.

[0065] Example 3

[0066] like Figure 9 and Figure 10 As shown, in this embodiment, the drive mechanism of the power tool is provided with a movable through hole 18. The limiting part 37 includes a one-way pawl disposed on the working head 30 along the circumferential direction. The locking part 20 is provided with limiting teeth that can engage with the one-way pawl to limit the relative rotation between the drive mechanism of the power tool and the working head 30. The locking part 20 is slidably disposed in the movable through hole 18. A second reset member 22 is provided in the movable through hole 18. The second reset member 22 acts on the locking part 20, giving the locking part 20 a tendency to engage the limiting teeth and the one-way pawl. This effectively limits the relative rotation between the two outside the allowable direction of the pawl, thereby preventing accidental disengagement due to vibration or impact as much as possible. As the tightening process proceeds, the elastic force of the second reset member 22 continuously increases, and the limiting teeth of the locking part 20 are more firmly pressed onto the one-way pawl of the working head 30, making the connection between the two more reliable.

[0067] The working head 30 is provided with an elastic sealing ring 23 at the axial connection between itself and the drive mechanism of the power tool. This ring generates an elastic preload at the axial connection to achieve axial preload. The elastic sealing ring 23 is compressed and deformed, generating a continuous elastic preload. This preload acts directly on the axial connection, effectively enhancing the axial preload effect of the connection, significantly improving the tightness and anti-loosening ability of the connection, especially resisting vibration and impact loads, and preventing power transmission failure or abnormal noise caused by loosening. At the same time, the compressed sealing ring fills the gap at the axial connection, achieving a reliable seal and preventing dust, moisture or debris from entering the drive mechanism.

[0068] It should be noted that the movable through hole 18 is provided on the housing 10, and the one-way pawl is provided at the end of the housing 31. When the working head 30 is twisted in the locking direction, the one-way pawl at its tail end engages with the limiting tooth. Due to the characteristics of the one-way pawl, the locking component 20 retracts axially and simultaneously returns to engage with the one-way pawl under the elastic force of the second elastic element. Because of the presence of the one-way pawl, the two only tighten further with each twist. When quick disassembly is required, the locking component 20 is moved axially in the unlocking direction, the one-way pawl disengages, and the working head 30 can be quickly disassembled.

[0069] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A drive mechanism of a power tool comprising a housing (10) and a drive motor (11) provided in the housing (10), characterized by, The drive motor (11) is connected to a clutch element (16), which includes a first connection part (161) for disengagingly connecting to an external working head (30) to transmit or interrupt power, and a second connection part (162) for detachably connecting to an external working head (30) to continuously transmit power.

2. The drive mechanism of the power tool according to claim 1, characterized in that, The first connecting part (161) is a clutch structure arranged along the circumferential direction of the clutch element (16) for unidirectional torque transmission or bidirectional torque transmission.

3. The drive mechanism of the power tool according to claim 1, characterized in that, The second connecting part (162) includes a bit hole for receiving a bit; or, the second connecting part (162) is a threaded section provided on the clutch element (16); or, the second connecting part (162) is a bayonet provided at the end of the clutch element (16); or, the second connecting part (162) is a magnetic adsorption surface provided on the clutch element (16).

4. The drive mechanism of the power tool according to claim 1, characterized in that, The clutch element (16) extends out of the front end of the housing (10), and the first connecting part (161) and the second connecting part (162) are both located at the same end of the clutch element (16) extending out of the housing (10).

5. A quick-release electric ratchet wrench, characterized in that, The device includes a working head (30) and a drive mechanism of an electric tool as described in any one of claims 1 to 4. The drive mechanism and the working head (30) of the electric tool are detachably connected. The drive mechanism and the working head (30) of the electric tool are respectively provided with a locking component (20) and a limiting part (37). When the drive mechanism and the working head (30) of the electric tool are connected, the locking component (20) cooperates with the limiting part (37) to lock the working head (30) onto the drive mechanism of the electric tool.

6. The quick-release electric ratchet wrench according to claim 5, characterized in that, The drive mechanism of the power tool and the working head (30) are threadedly connected.

7. The quick-release electric ratchet wrench according to claim 5, characterized in that, The drive mechanism of the power tool is provided with a movable notch (17), and the limiting part (37) includes a limiting notch provided on the working head (30). The limiting notch extends axially and has a sidewall for cooperating with a locking member (20). The locking member (20) is slidably disposed in the movable notch (17) and can slide into the limiting notch to limit the relative rotation between the drive mechanism of the power tool and the working head (30).

8. The quick-release electric ratchet wrench according to claim 7, characterized in that, The movable notch (17) is provided with a first reset member (21), which acts on the locking member (20) to make the locking member (20) have a tendency to slide towards the limiting notch.

9. The quick-release electric ratchet wrench according to claim 6, characterized in that, The drive mechanism of the power tool is provided with a movable through hole (18). The limiting part (37) includes a one-way pawl provided on the working head (30) in the circumferential direction. The locking part (20) is provided with a limiting tooth that can engage with the one-way pawl to limit the relative rotation between the drive mechanism of the power tool and the working head (30). The locking part (20) is slidably disposed in the movable through hole (18). The movable through hole (18) is provided with a second reset member (22). The second reset member (22) acts on the locking part (20) to make the locking part (20) have a tendency to engage the limiting tooth and the one-way pawl.

10. The quick-release electric ratchet wrench according to claim 9, characterized in that, An elastic sealing ring (23) is provided at the axial connection between the working head (30) and the drive mechanism of the power tool, which is used to generate an elastic preload at the axial connection between the working head (30) and the drive mechanism of the power tool to achieve axial preload.

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