Screwdriver locking structure and screwdriver

Abstract

The utility model discloses a screw driver locking structure and a screw driver. The screw driver locking structure comprises a main body, the main shaft is rotationally connected to the main body, a tool receiving structure is arranged at the end, away from the main body, of the main shaft, and a locking assembly is connected to the main shaft; the control assembly is arranged on the periphery of the main shaft in a sleeving mode and connected with the main shaft in a sliding mode, the control assembly comprises a movable sleeve and a fixed sleeve which are detachably connected, the control assembly has a locking state and an unlocking state, and in the locking state, the movable sleeve and the fixed sleeve can be unlocked. The control assembly is connected with the locking assembly so that the locking assembly can limit a tool connected with the tool receiving structure, and in the unlocking state, the locking assembly relieves limitation on the tool connected with the tool receiving structure; the locking assembly comprises at least two balls. And the control assembly is matched with the locking ball body, so that the bit can be reliably locked and unlocked.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance tools, and more specifically, to a locking structure of a screwdriver machine and a screwdriver machine. Background Art

[0002] In the existing maintenance and production fields, wrenches and screwdrivers, as important components of manual tools, are widely used in various fastening and disassembly operations. However, traditional impact screwdriver machines and impact wrenches generally adopt a single clamping structure design, and can only clamp hex bits or socket wrenches of specific sizes respectively, which greatly limits the flexibility and application range of the tools. For example, an impact screwdriver machine can usually only clamp a 6.35 mm hex bit, while an impact wrench is limited to a 12.7 mm socket wrench. This limitation is particularly obvious in complex maintenance and production scenarios, where tools need to be frequently replaced, reducing work efficiency.

[0003] To overcome this defect, a tool with an integrated wrench and screwdriver structure has emerged on the market. Through the design of a control component, this tool can both clamp a 6.35 mm hex bit and a 12.7 mm socket wrench, achieving the function of multi-purpose clamping. However, the current design has relatively large wear when locking different specifications of bits, and the cost is relatively high. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a locking structure of a screwdriver machine, which can be assembled and disassembled more conveniently and can reduce the production cost of products.

[0005] To achieve the above purpose, in the first aspect, the present application provides a locking structure of a screwdriver machine, including:

[0006] A main body;

[0007] A main shaft rotatably connected to the main body. A tool receiving structure is provided at an end of the main shaft away from the main body, and a locking component is connected to the main shaft;

[0008] A control component sleeved on the outer periphery of the main shaft and slidably connected to the main shaft. The control component includes a movable sleeve and a fixed sleeve that are detachably connected. The control component has a locked state and an unlocked state. In the locked state, the control component is connected to the locking component so that the locking component restricts the tool connected to the tool receiving structure. In the unlocked state, the locking component releases the restriction on the tool connected to the tool receiving structure;

[0009] Wherein, the locking component includes at least two spheres.

[0010] Currently, during the locking process of the screwdriver machine on the bit, there is a large friction when the locking component abuts against the bit. After a long time, due to wear, the locking reliability of the bit is affected. In the technical solution of this application, the main body of the screwdriver machine serves as the support and foundation of the entire structure. The main shaft is rotationally connected to the main body, realizing the basic function of rotational movement. The end of the main shaft far from the main body is provided with a tool receiving structure. This design enables the screwdriver machine to conveniently connect and replace different types of tool heads, improving the versatility and flexibility of the tool. At least two spheres are used to abut and lock the bit. By using at least two spheres as locking elements, this design not only simplifies the structure but also improves the locking reliability and stability. When the spheres are under appropriate pressure, they can closely fit the tool receiving structure or the tool itself, achieving a firm locking effect and preventing the tool from loosening or falling off during use. In the locked state, the two spheres are within the limit groove of the bit and do not move radially with respect to the main shaft, enabling the bit to be locked and preventing the bit from detaching from the main shaft. In the locked state, the two spheres can rotate under the working force, canceling the impact force during the working process and reducing the large wear on the spheres and the bit caused by direct impact. At the same time, the spheres can be standard parts, with stable quality, convenient after-sales maintenance, and low cost.

[0011] Combined with the first aspect, a further technical solution is that the tool receiving structure includes a polygonal groove provided at one end of the main shaft far from the main body for placing the bit.

[0012] Combined with the first aspect, a further technical solution is that the tool receiving structure further includes a polygonal cylinder provided at one end of the main shaft far from the main body for placing the sleeve.

[0013] The tool receiving structure can match the bit and the sleeve, further enhancing the functionality and practicality of the screwdriver machine.

[0014] Combined with the first aspect, a further technical solution is that a chute communicating the polygonal groove and the outer peripheral surface of the main shaft is provided in the radial direction of the main shaft, and at least two of the spheres are partially disposed in the chute.

[0015] The spherical part is located within the sliding groove and can rotate relative to it within the sliding groove. When the control component is in the locked state, the spherical part is pushed into the polygonal groove by the control component, causing the spherical part to come into close contact with the bit, thereby achieving dynamic locking. This design allows the spherical part to be finely adjusted according to the actual size and shape of the bit to provide a more precise locking effect. When it is necessary to unlock and replace the bit, the user can release the pressure on the spherical part through corresponding operations of the control component (such as pushing a button, rotating a handle, etc.), causing the spherical part to move inwards or outwards within the sliding groove, thereby unlocking the bit. This unlocking method is simple and fast, without the need to use additional tools, improving work efficiency. The movement or rotation of the spherical part within the sliding groove can reduce direct friction with the main shaft or other components, thereby reducing the risk of wear and damage. In addition, the spherical part is usually made of wear-resistant materials and can withstand long-term use and frequent locking / unlocking operations. The dynamic locking mechanism ensures that the bit will not cause safety accidents due to loosening or falling off during rotation. The close contact between the spherical part and the bit provides a reliable locking force, maintaining stability even during high-speed rotation or under heavy loads.

[0016] Combined with the first aspect, a further technical solution is that the rotational axes of the polygonal groove and the polygonal cylinder coincide.

[0017] Through the above technical solution, since the rotational axes of the polygonal groove and the polygonal cylinder coincide, this ensures that the rotational movement of the tool head on the main shaft is stable and smooth. There is no risk of axis offset or tilt, thereby reducing vibration and noise, and improving work efficiency and precision. The design with coincident rotational axes enables torque (i.e., rotational force) to be more effectively transmitted from the main shaft to the tool head. This efficient torque transmission is particularly important for application scenarios that require high torque output. Since wear caused by loosening or vibration is reduced, this design also helps to extend the service life of the main shaft, the polygonal groove, and the tool head. The frequency of maintenance and replacement is reduced, lowering the usage cost. During use, the user can more easily install the tool head onto the main shaft and ensure its correct alignment. This simplicity improves work efficiency and reduces the risk of damage caused by improper operation.

[0018] Combined with the first aspect, a further technical solution is that a fixing member is provided on the main shaft on the side opposite to the fixing sleeve away from the main body, and a first elastic member is provided between the fixing sleeve and the fixing member.

[0019] Through the above technical solution, the first elastic member (such as a spring) provides a certain pre-tightening force between the fixed sleeve and the fixing member. This pre-tightening force helps to maintain the stable position of the control assembly (including the movable sleeve and the fixed sleeve) on the main shaft, preventing it from loosening due to vibration or impact during operation. At the same time, the pre-tightening force can also help to achieve a tight locking of the sphere to the tool in the polygonal groove, improving the reliability of the locking. When the user operates the control assembly to switch between the locked and unlocked states, the first elastic member will generate a corresponding reaction force. This operation feedback helps the user to perceive the change in the locked state, thus ensuring the accuracy and effectiveness of the operation. During operation, the screwdriver may receive reaction forces from the tool tip or the working surface. The presence of the first elastic member can play a certain role in buffering and shock absorption, reducing the impact and damage of these reaction forces on the main shaft and the locking structure. The first elastic member can also achieve the automatic reset function of the control assembly. That is, when the user releases the operating force on the control assembly, the elastic member will push the fixed sleeve back to the initial position, so that the control assembly returns to the locked or unlocked state. This automatic reset function improves the convenience and efficiency of use.

[0020] Combined with the first aspect, a further technical solution is that the movable sleeve is further connected with an insert, and the insert is connected with the sphere that is farthest from the center line of the main shaft among the at least two spheres.

[0021] Combined with the first aspect, a further technical solution is that the insert is provided with a first contact surface and a second contact surface, and the distance between the second contact surface and the center line of the main shaft is greater than the distance between the first contact surface and the center line of the main shaft.

[0022] Combined with the first aspect, a further technical solution is that in the locked state, the first contact surface abuts against the sphere that is farthest from the center line of the main shaft among the at least two spheres so that the sphere that is closest to the center line of the main shaft among the at least two spheres partially enters the polygonal groove; in the unlocked state, the insert slides relative to the main shaft to the second contact surface corresponding to the chute, and the sphere that is closest to the center line of the main shaft among the at least two spheres completely enters the chute.

[0023] Through the above technical solution, the insert has a first contact surface and a second contact surface, and the distance from the second contact surface to the center line of the main shaft is greater than that of the first contact surface. This design enables the insert to come into contact with the sphere or the chute through different contact surfaces during the sliding process, thereby achieving the locked or unlocked state. In the locked state, the first contact surface abuts against the sphere farthest from the center line of the main shaft. Due to the fixed position and acting force of the insert, this sphere is pushed towards the polygonal groove, and then pushes other spheres (especially the sphere closest to the center line of the main shaft) partially into the polygonal groove. In this way, the tight fit between the spheres and the polygonal groove realizes the locking of the tool head. When unlocking is required, the user slides the control component relative to the main shaft. As the movable sleeve slides, the insert also moves accordingly until the second contact surface corresponds to the chute. At this time, the sphere farthest from the center line of the main shaft is pushed by the bit into the space enclosed by the second contact surface of the insert, and its position changes, no longer generating sufficient thrust on the sphere closest to the center line of the main shaft. Therefore, the sphere closest to the center line of the main shaft can completely enter the chute, releasing the locking of the tool head in the polygonal groove.

[0024] In a second aspect, the present application provides a screwdriver, including the screwdriver locking structure of the first aspect.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. The screwdriver locking structure of the present application is simple in structure. In the locked state, the control component is connected to the locking component, and the locking component restricts the tool connected to the tool receiving structure through the action of the control component, ensuring that the tool does not loosen during rotation. In the unlocked state, the locking component releases the restriction on the tool, allowing the user to easily replace or remove the tool. The design of this mechanism not only ensures the safety of tool use but also improves work efficiency. The locking is convenient and fast, reducing the difficulty of disassembly and assembly.

[0027] 2. The screwdriver locking structure of the present application can improve the on-site operation efficiency and is convenient to use.

[0028] 3. The screwdriver locking structure of the present application uses a structure with at least two spheres for locking and unlocking. The structure is reliable in function, has little wear, and a long service life.

[0029] 4. The screwdriver of the present application improves the product life and operation convenience, enhancing the user experience and recognition.

[0030] With such a setting, only by using the anti-rotation tool to move the locking component radially along the main shaft, the unlocking and locking of the bit can be achieved. The disassembly and assembly of the entire device are convenient and fast, and the production cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0032] Figure 1 Schematic diagram of the structure of the first embodiment of the screwdriver locking structure provided by the present application;

[0033] Figure 2 Schematic diagram of the assembly of the first embodiment of the screwdriver locking structure of the present application and the screwdriver;

[0034] Figure 3 Schematic diagram of the assembly of the first embodiment of the screwdriver locking structure of the present application and the sleeve;

[0035] Figure 4 Exploded view of the structure of the first embodiment of the screwdriver locking structure of the present application;

[0036] Figure 5 Schematic diagram of the structure of the fixed sleeve of the first embodiment of the screwdriver locking structure of the present application;

[0037] Figure 6 Schematic diagram of the structure of the movable sleeve of the first embodiment of the screwdriver locking structure of the present application;

[0038] Figure 7 Schematic diagram of the structure of the second embodiment of the screwdriver locking structure of the present application;

[0039] Figure 8 Schematic diagram of the assembly of the second embodiment of the screwdriver locking structure of the present application and the sleeve;

[0040] Figure 9 Exploded view of the second embodiment of the screwdriver locking structure of the present application;

[0041] Figure 10 Schematic diagram of the structure of the screwdriver of the present application.

[0042] Reference numerals:

[0043] 100, Screwdriver locking structure; 1, Main body; 2, Spindle; 21, Polygonal groove; 3, Bit; 4, Wrench socket; 5, Locking steel ball; 6, Sealing component; 7, Control component; 71, Insert; 711, First contact surface; 712, Second contact surface; 72, Fixed sleeve; 721, Fixed boss; 722, Anti-rotation buckle; 723, Concave-convex structure; 73, Movable sleeve; 731, Positioning groove; 7311, First channel; 732, Anti-rotation groove; 7321, Second channel; 8, Limit retaining ring; 9, First spring; 91, Second spring; 10, Sealing structure; L, Disassembly and assembly gap;

[0044] 200, Screwdriver; 201, Main unit. Specific embodiments

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0047] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0048] The following will describe the embodiments of this application in detail with reference to the accompanying drawings. The features in the following embodiments can be combined with each other without conflict. Embodiment 1

[0049] The core of this embodiment is to provide a screwdriver locking structure, which can be assembled and disassembled more conveniently and can reduce the production cost of the product.

[0050] Please refer to Figures 1-4, A screwdriver machine locking structure includes a main body 1, a main shaft 2, a locking component, a sealing component 6 and a control component 7. In this embodiment, the locking component is at least two spheres, and the spheres are locking steel balls 5.

[0051] Specifically, a through hole for installing the main shaft 2 is provided at the first end of the main body 1, so that one end of the main shaft 2 is located inside the cavity of the main body 1, and the other end of the main shaft 2 extends outside the main body 1. That is to say, by setting the through hole, the rotational connection between the main shaft 2 and the main body 1 can be realized, so that the main shaft 2 transmits the output power of the motor in the cavity of the main body 1 to the next component, thereby completing the effective output of power. A tool receiving structure is provided at the end of the main shaft away from the main body. The tool receiving structure is a polygonal groove formed by the main shaft 2 extending along its axial direction for installing the bit 3. The required bit 3 is preliminarily fixed through the polygonal groove, and a polygonal column for sleeving the wrench socket 4 is provided on the outer periphery of the polygonal groove. In this device, the power output path is that the motor outputs to the main shaft 2, and the power is transmitted to the bit 3 through the main shaft 2, thereby realizing the power output of the device.

[0052] A long hole extending along the radial direction of the main shaft 2 for installing two locking steel balls 5 is provided in the circumferential direction of the polygonal groove. The long hole communicates with the polygonal groove, and the locking steel ball 5 can move along the length direction of the long hole in the long hole. That is to say, by the reciprocating movement of the locking steel ball 5 along the radial direction of the main shaft 2, the locking and loosening of the bit 3 are realized. The inner periphery of the control component 7 provided on the outer periphery of the main shaft 2 abuts against the locking steel ball 5, and through the cooperation between the control component 7 and the locking steel ball 5, the locking and unlocking of the bit 3 are realized.

[0053] The control component 7 is sleeved on the outer periphery of the main shaft 2 and is slidably connected to the main shaft 2. The control component 7 includes a movable sleeve 73 and a fixed sleeve 72 that are detachably connected. The control component 7 has a locked state and an unlocked state when sliding relative to the main shaft 2. In the locked state, the control component 7 is connected to the locking component so that the locking component restricts the tool connected to the tool receiving structure. In the unlocked state, the locking component releases the restriction on the tool connected to the tool receiving structure. Among them, a disassembly and assembly gap L is provided between the fixed sleeve 72 near one end of the main body 1 and the main body 1. The disassembly and assembly gap L is used to operate to restrict the rotation of the fixed sleeve 72 for disassembly and assembly of the movable sleeve 73.

[0054] The control assembly includes a movable insert 71, a fixed sleeve 72, and a movable sleeve 73. The movable insert 71 is disposed on the outer periphery of the main shaft 2. In the locked state, the inner periphery of the movable insert 71 abuts against the locking steel ball 5. The fixed sleeve 72 is disposed on the outer periphery of the main shaft 2 and close to one side of the main body 1. The movable sleeve 73 is sleeved on the outer peripheries of the movable insert 71 and the fixed sleeve 72. A fixing member is also fixedly connected to the main shaft 2. A first elastic member for applying a restoring force to the fixed sleeve 72 in the direction towards the main body 1 is provided between the fixed sleeve 72 and the fixing member. The first elastic member is a first spring 9. In this embodiment, the movable sleeve 73 and the insert 71 are fixedly connected by interference fit. The insert 71 is provided with a first contact surface 711 and a second contact surface 712. The distance from the second contact surface 712 to the center line of the main shaft 2 is greater than the distance from the first contact surface 711 to the center line of the main shaft 2. In the locked state, the first contact surface 711 of the insert 71 abuts against the locking steel ball 5 and pushes the locking steel ball 5 into the polygonal groove 21 to lock the bit. In the unlocked state, when the bit 3 is taken out, a force is applied to slide the movable sleeve 73 in the direction away from the main body 1. The first contact surface 711 leaves the locking steel ball 5. During the pulling process of the bit 3, the locking steel ball 5 is pushed into the space enclosed by the second contact surface 712, and the locking steel ball 5 disengages from the polygonal groove 21 and cannot lock the bit 3, achieving unlocking. After the force on the movable sleeve 73 disappears, the first spring 9 pushes the fixed sleeve 72 to reset in the direction towards the main body 1, and the fixed sleeve 72 drives the movable sleeve 73 and the insert 71 to reset together.

[0055] It should be noted that through the cooperation of the movable insert 71, the fixed sleeve 72, and the movable sleeve 73, the positioning of the locking steel ball 5 can be achieved.

[0056] Among them, the movable sleeve 73 and the movable insert 71 are fixedly connected by interference fit. The fixed sleeve 72 is pre-installed circumferentially on the main shaft 2. With such a setting, the locking and disassembly with the fixed sleeve 72 can be achieved only by rotating the movable sleeve 73. This setting method is beneficial to quickly and accurately install and disassemble the control assembly 7, with simple operation and convenient use. In actual life, there is no limitation on the setting method of the movable insert 71, the fixed sleeve 72, and the movable sleeve 73, as long as the above technical effects can be achieved.

[0057] In this embodiment, rotating the movable sleeve 73 forward is used to lock it with the fixed sleeve 72, and rotating the movable sleeve 73 backward is used to unlock it from the fixed sleeve 72. In actual life, there is no limitation on the forward and backward directions, and it can be set according to the actual situation. The key is to set it according to the rotation direction of the motor so that the movable sleeve 73 is locked in the rotation direction that is not easy to disengage.

[0058] Please refer to Figure 5 and Figure 6, a convex structure or a groove is provided on the outer periphery of the fixed sleeve 72, and a groove or a convex structure is provided on the inner periphery of the movable sleeve 73. The convex structure and the groove are slidably and / or rotatably engaged to achieve the locking and separation of the fixed sleeve 72 and the movable sleeve 73. The groove includes a positioning groove 731 and a rotation stopping groove 732, and both the positioning groove 731 and the rotation stopping groove 732 are connected to a channel communicating with the end face of the fixed sleeve 72 or the end face of the movable sleeve 73; the convex structure includes a convex platform and a rotation stopping buckle 722. In the locked state of the fixed sleeve 72 and the movable sleeve 73, the convex platform is located in the positioning groove 731, and the rotation stopping buckle 722 is located in the rotation stopping groove 732. The positioning groove 731 is an arc-shaped groove that rotates around the central axis of the fixed sleeve 72 or the central axis of the movable sleeve 73. In the locked state of the fixed sleeve 72 and the movable sleeve 73, the distance from the bottom wall position where the convex platform contacts the positioning groove 731 to the central axis of the fixed sleeve 72 or the central axis of the movable sleeve 73 is the smallest, so that the rotation stopping buckle 722 enters the rotation stopping groove 732. That is, the radius of the bottom wall of the positioning groove 731 becomes smaller in the locking direction and is the smallest at the position where the convex platform contacts the positioning groove 731, so that the movable sleeve 73 and the fixed sleeve 72 move radially relative to each other, and the rotation stopping buckle 722 enters the rotation stopping groove 732 to be locked.

[0059] Please refer to Figure 5 and Figure 6 , a fixed convex platform 721 and a rotation stopping buckle 722 are provided on the outer periphery of the fixed sleeve 72, and a positioning groove 731 and a rotation stopping groove 732 are provided on the inner periphery of the movable sleeve 73. The positioning groove 731 is used for clamping the fixed convex platform 721, and the rotation stopping groove 732 is used for clamping the rotation stopping buckle 722. An uneven structure 723 is provided at one end of the fixed sleeve 72 close to the main body 1. The uneven structure 723 includes a plurality of convex ribs provided on the end face of the fixed sleeve 72 close to the main body 1. The plurality of convex ribs are circumferentially distributed on the end face of the fixed sleeve 72. In this embodiment, the convex ribs are evenly distributed circumferentially. In actual application, they can be irregularly arranged as long as the rotation stopping effect can be achieved. It can be understood that by providing a clamping structure on the circumference of the fixed sleeve 72, the relative fixation of the fixed sleeve 72 and the movable sleeve 73 is realized. The clamping structure can be the fixed convex platform 721 and the rotation stopping buckle 722, or other clamping parts, as long as the clamping of the fixed sleeve 72 and the movable sleeve 73 can be achieved.

[0060] Among them, in one embodiment, the fixed convex platform 721 is a rectangular structure with a curvature along the outer periphery of the fixed sleeve 72, the rotation stopping buckle 722 is a frustum structure extending radially outward along the fixed sleeve 72, and the rotation stopping groove 732 is a circular hole. However, in actual life, there is no limitation on this, as long as the above technical effects can be achieved.

[0061] It should be noted that through the engagement of the positioning groove 731 and the fixing boss 721, the first fixation of the fixing sleeve 72 and the movable sleeve 73 is achieved. Through the engagement of the anti-rotation groove 732 and the anti-rotation buckle 722, the second fixation of the fixing sleeve 72 and the movable sleeve 73 is achieved. By setting two clamping structures, the double fixation of the fixing sleeve 72 and the movable sleeve 73 is realized, and the effective locking of the bit 3 is achieved.

[0062] In another embodiment, various clamping grooves are provided on the fixing sleeve 72, and various corresponding clamping parts are provided on the movable sleeve 73. Through the cooperation of the clamping grooves and the clamping parts, the fixation of the fixing sleeve 72 and the movable sleeve 73 is achieved. In actual life, there are no restrictions on the type, installation position, specifications, etc. of the clamping structure, as long as the above technical effects can be achieved.

[0063] Based on the above embodiment, a first channel 7311 communicating with the positioning groove 731 and a second channel 7321 communicating with the anti-rotation groove 732 are provided on the inner circumference of the movable sleeve 73. One ends of the first channel 7311 and the second channel 7321 are both communicated with the end face of the movable sleeve 73.

[0064] Furthermore, both the first channel 7311 and the second channel 7321 are of an inverted L-shaped structure, and the first channel 7311 cooperates with the fixing boss 721 to enable the fixing boss 721 to move along the first channel 7311, and the second channel 7321 cooperates with the anti-rotation buckle 722 to enable the anti-rotation buckle 722 to move along the second channel 7321.

[0065] It should be noted that by providing the first channel 7311 and the second channel 7321 on the movable sleeve 73, the fixing boss 721 can be advanced into the movable sleeve 73 along the first channel 7311, and the anti-rotation buckle 722 can be advanced into the movable sleeve 73 through the second channel 7321. The radius of the bottom wall of the first channel 7311 becomes smaller in the tightening rotation direction and is the smallest at the locking position. When the fixing boss 721 moves to the locking position (i.e., the end of the first channel 7311), the anti-rotation buckle 722 is pushed into the anti-rotation groove 732 inside the movable sleeve 73. Fix the fixing sleeve 72 with the disassembly and assembly tool 200, and rotate the movable sleeve 73 forward to achieve the clamping of the fixing sleeve 72 and the movable sleeve 73.

[0066] As a preferred implementation manner, the positioning groove 731 and the anti-rotation groove 732 are respectively provided at the ends of the first channel 7311 and the second channel 7321. In this way, the first channel 7311 and the second channel 7321 play the role of primary positioning, and the positioning groove 731 and the anti-rotation groove 732 play the role of secondary positioning. Through the two-positioning, the effective locking of the fixing sleeve 72 and the movable sleeve 73 is achieved. However, in actual life, there are no restrictions on the specific positions of the positioning groove 731 and the anti-rotation groove 732 in the first channel 7311 and the second channel 7321, as long as the above technical effects can be achieved.

[0067] The self-locking and disassembly process of the device is as follows: The anti-rotation buckle 722 and the fixing boss 721 provided on the fixed sleeve 72 are correspondingly pushed in according to the set assembly direction through the first channel 7311 and the second channel 7321 provided on the movable sleeve 73. After being pushed in, a relatively small space gap will be formed between the fixed sleeve 72 and the main body 1. In this gap, a disassembly and assembly tool is used to fix the concave-convex structure 723 of the fixed sleeve 72 to limit the rotation of the fixed sleeve 72. Rotating the movable sleeve 73 can make the anti-rotation buckle 722 on the fixed sleeve 72 snap into the anti-rotation groove 732. At the same time, the fixing boss 721 on the fixed sleeve 72 and the positioning groove 731 on the movable sleeve 73 achieve axial movement limit. Under the action of the first spring 9, the two parts of the movable sleeve 73 and the fixed sleeve 72 are relatively reliably fixed and self-locked; when disassembling, similarly, a disassembly and assembly tool is used to fix the fixed sleeve 72 in the gap between the fixed sleeve 72 and the main body 1, and the movable sleeve 73 is rotated in the opposite direction to make the anti-rotation buckle 722 on the fixed sleeve 72 disengage from the anti-rotation groove 732 of the movable sleeve 73. Until the fixed sleeve 72 is axially pulled out after reverse rotation.

[0068] In the above embodiment, there are at least two fixing bosses 721 and anti-rotation buckles 722, and the positioning grooves 731 and anti-rotation grooves 732 are correspondingly arranged with the fixing bosses 721 and anti-rotation buckles 722.

[0069] It can be understood that in one embodiment, there are two, three or more fixing bosses 721 and anti-rotation buckles 722, and the corresponding positioning grooves 731 and anti-rotation grooves 732 are also set to two, three or more. The multiple fixing bosses 721 and anti-rotation buckles 722 can be arranged crosswise in the circumferential direction of the fixed sleeve 72, or the fixing bosses 721 can be arranged adjacent to each other, and there is no limitation on this.

[0070] In another embodiment, multiple fixing bosses 721 and multiple anti-rotation buckles 722 can be arranged crosswise along the axial direction of the fixed sleeve 72.

[0071] Reference Figures 1-6 , as a preferred implementation manner, the second end of the movable sleeve insert 71 abuts against the limit retaining ring 8, and there is a first spring 9 between the limit retaining ring 8 and the fixed sleeve 72.

[0072] It should be noted that self-locking is achieved by means of the two-component structure of the movable sleeve 73 and the fixed sleeve 72 to realize mutual limiting and prevent separation. After setting the limit retaining ring 8, the manipulation assembly 7 is restricted from detaching from the main shaft 2. After setting the first spring 9, it can ensure that the manipulation assembly 7 returns to the free position after the bit 3 is unlocked or locked. The locking steel balls 5 are limited by the movable sleeve 73 and the insert 71 to realize the self-locking function of the bit 3 in the main shaft 2. When it is necessary to unlock and pull out the bit 3, the movable sleeve 73 is pushed to move the lock sleeve assembly axially in the direction of the bit 3 by a certain position, so that the insert 71 of the movable sleeve moves out of the positioning space of the locking steel balls 5. The locking steel balls 5 have a radial movement space in the insert 71 of the movable sleeve. When the bit 3 is taken out, the movable sleeve 73 is released, and under the action of the first spring 9, the locking steel balls 5 return to the initial position.

[0073] In the above situation, the main shaft 2 is a T-shaped shaft, and an annular groove for installing an O-ring is provided on the outer periphery of the first end of the main shaft 2.

[0074] It can be understood that a sealing structure 10 is provided on the outer periphery of the first end of the main shaft 2. The sealing structure 10 includes a circlip and an O-ring. The wrench socket 4 is fixed by the circlip, and the main shaft 2 and the wrench socket 4 are sealed by the O-ring. In this embodiment, the main shaft 2 and the wrench socket 4 are fixed and sealed in the above manner. However, in actual life, there is no limitation on this, as long as the above technical effects can be achieved.

[0075] In the above embodiment, there are at least two groups of long holes, and at least two locking steel balls 5 are provided in any one group of long holes.

[0076] It should be noted that the number of long holes can be set according to the actual situation, and there is no limitation on the diameter of the long holes, as long as they can cooperate with the locking steel balls 5. Moreover, the number of locking steel balls 5 can be one group or two groups, etc., and there is no limitation on this. The key design to be achieved is that in the locked state, the first contact surface 711 abuts against the locking steel ball 5 that is farthest from the center line of the main shaft 2 among at least two locking steel balls 5, so that the locking steel ball 5 that is closest to the center line of the main shaft 2 among at least two locking steel balls 5 partially enters the polygonal groove 21; in the unlocked state, the insert 71 slides relative to the main shaft 2 until the second contact surface 712 corresponds to the chute, and the locking steel ball 5 that is closest to the center line of the main shaft 2 among at least two locking steel balls 5 completely enters the chute.

[0077] On the basis of the above embodiment, a sealing assembly 6 is provided on the outer periphery of the main shaft 2, and the sealing assembly 6 is used to seal the main shaft 2 and the main body 1.

[0078] It can be understood that the sealing assembly 6 includes a circlip and an O-ring. The main shaft 2 is fixed to the main body 1 by the circlip, and the gap between the main shaft 2 and the main body 1 is sealed by the O-ring. However, in actual life, there is no limitation on the components for sealing and fixing the main shaft 2, as long as the above technical effects can be achieved.

[0079] In summary, the screwdriver locking structure provided by the present application can be used as a multi-purpose clamping structure product that can be used as both an impact wrench and an impact screwdriver. This product can achieve the fixed clamping of a 12.7 mm or 19 mm wrench socket 4, and can clamp a 6.35 mm hexagon screwdriver bit 3 at the same time. The product realizes a more convenient assembly mode and disassembly mode, and reduces the implementation cost of the product. Embodiment 2

[0080] Please refer to Figures 7-9 , which is different from the first embodiment in that a second elastic member is provided between the fixing member 8 and the insert member 71. The second elastic member is a second spring 91. The first spring 9 and the second spring 91 are located on both sides of the fixing member 8, and the K value of the first elastic member 9 is greater than the K value of the second spring 91.

[0081] During the use of this embodiment, the first spring 9 pushes the fixing sleeve 72 to move closer to the main body 1, and the second spring 91 pushes the insert member 71 to move away from the main body 1. Since the elastic force of the first spring 9 is greater than the elastic force of the second spring 91, the control assembly 7 is in a locked state at the position close to the main body 1 in the free state. When the driving movable sleeve 73 moves away from the main body 1, the first spring 9 is compressed, and the second spring 91 pushes the insert member 71 to move away from the main body 1, being in an unlocked state. The structural advantage of this embodiment is that the insert member 71 and the movable sleeve 73 are slidably connected, and the impact wear during work is relatively small, which can better ensure the realization of the unlocked state. In the first embodiment, the insert member 71 and the movable sleeve 73 are in interference fit, and wear will occur during the working impact. After a long time, the connection is unreliable, resulting in the movable sleeve 73 not being able to drive the insert member 71 to move away from the main body 1 in the unlocked state, causing the unlocking function to fail. In this embodiment, the insert member 71 and the movable sleeve 73 can be in interference connection or sliding connection, and both can achieve effective unlocking and locking functions. Embodiment 3

[0082] Please refer to Figure 10 , this embodiment discloses a screwdriver 200, including the screwdriver locking structure 100 and the main unit 201 in the first embodiment or the second embodiment.

[0083] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0084] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the embodiments can be referred to each other.

[0085] The above has introduced in detail a screwdriver locking structure provided by the present utility model. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A screwdriver locking structure, characterized in that, Comprising: A main body; A main shaft rotatably connected to the main body, a tool receiving structure is provided at an end of the main shaft away from the main body, and a locking assembly is connected to the main shaft; A control assembly sleeved on the outer periphery of the main shaft and slidably connected to the main shaft, the control assembly includes a movable sleeve and a fixed sleeve that are detachably connected, the control assembly has a locked state and an unlocked state. In the locked state, the control assembly is connected to the locking assembly so that the locking assembly restricts the tool connected to the tool receiving structure. In the unlocked state, the locking assembly releases the restriction on the tool connected to the tool receiving structure; Wherein, the locking assembly includes at least two spheres.

2. The screwdriver locking structure according to claim 1, characterized in that, The tool receiving structure includes a polygonal groove provided at an end of the main shaft away from the main body for placing a bit.

3. The screwdriver locking structure according to claim 2, characterized in that, The tool receiving structure further includes a polygonal cylinder provided at an end of the main shaft away from the main body for placing a socket.

4. The screwdriver locking structure according to claim 2, wherein A chute communicating the polygonal groove and the outer peripheral surface of the main shaft is provided in the radial direction of the main shaft, and at least two of the spheres are partially disposed in the chute.

5. The screwdriver locking structure according to claim 3, wherein The rotation axes of the polygonal groove and the polygonal cylinder coincide.

6. The screwdriver machine locking structure according to claim 1, characterized in that, A fixing member is provided on the main shaft on a side away from the main body relative to the fixed sleeve, and a first elastic member is provided between the fixed sleeve and the fixing member.

7. The screwdriver locking structure according to claim 4, wherein, The movable sleeve is further connected with an insert, and the insert is connected to the sphere farthest from the center line of the main shaft among the at least two spheres.

8. The screwdriver locking structure according to claim 7, characterized in that, The insert is provided with a first contact surface and a second contact surface, and the distance from the second contact surface to the center line of the main shaft is greater than the distance from the first contact surface to the center line of the main shaft.

9. The screwdriver locking structure according to claim 8, wherein, In the locked state, the first contact surface abuts against the sphere farthest from the center line of the main shaft among the at least two spheres so that the sphere closest to the center line of the main shaft among the at least two spheres partially enters the polygonal groove; in the unlocked state, the insert slides relative to the main shaft until the second contact surface corresponds to the chute, and the sphere closest to the center line of the main shaft among the at least two spheres completely enters the chute.

10. A screwdriver machine, characterized in that, Including a screwdriver locking structure according to any one of claims 1-9.

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