Structure for disassembling and assembling a screwdriver as well as screwdrivers

Abstract

Disassembly / assembly structure for a screwdriver, characterized in that it comprises: a base body; a spindle rotatably connected to the base body, wherein a tool receptacle is provided at the end of the spindle facing away from the base body, and a locking arrangement is attached to the spindle; an actuating arrangement which is fitted over the outer circumference of the spindle and slidably connected to it, wherein the actuating arrangement comprises a drive bushing and a fixed bushing which are detachably connected to each other; wherein a disassembly gap is provided between the end of the fixed bushing facing the base body and the base body in order to restrict the rotation of the fixed bushing and thus enable the assembly or disassembly of the drive bushing.

Description

Technical field

[0001] The present utility model application relates to the field of maintenance tools and in particular to a structure for disassembling and assembling a screwdriver and a screwdriver. State of the art

[0002] In modern maintenance and production environments, wrenches and screwdrivers are essential hand tools frequently used for various fastening and disassembly tasks. However, most standard impact screwdrivers and impact wrenches feature a single clamping mechanism that can only accommodate specific sizes of hex bits or sockets. This significantly limits their flexibility and range of applications. For example, an impact screwdriver typically accepts only a 6.35 mm hex bit, while an impact wrench is limited to a 12.7 mm socket. These limitations become particularly apparent in complex maintenance and production scenarios, where frequent tool changes are necessary, reducing work efficiency.

[0003] To solve this problem, integrated tools are already available on the market that combine the functions of a wrench and a screwdriver. Using a specially designed actuating component, these tools can accommodate both a 6.35 mm hex bit and a 12.7 mm socket wrench, thus providing a multi-purpose clamping function. However, this design still has several drawbacks in practice. First, the disassembly and assembly process is comparatively cumbersome and unwieldy, requiring certain skills and experience, thereby increasing complexity and time. Furthermore, the complex structure leads to higher production costs, which hinders widespread use.

[0004] There is therefore an urgent technical need to solve the problem of complicated disassembly and assembly in integrated wrench-screwdriver structures. Content of the present application

[0005] Against this background, the objective of the present utility model application is to provide a disassembly / assembly structure for a screwdriver and the screwdriver itself in order to facilitate easier assembly and disassembly while reducing production and maintenance costs.

[0006] To achieve this goal, a disassembly / assembly structure for a screwdriver is provided in a first aspect of the present application, comprising: a basic body; a spindle rotatably connected to the base body and having a tool holder at its end facing away from the base body; a locking mechanism is attached to the spindle; an actuating arrangement which is fitted over the outer circumference of the spindle and slidably connected to it, wherein the actuating arrangement comprises a removable drive bushing and a fixed bushing; a disassembly gap provided between the end of the fixed bushing facing the base body and the base body to limit the rotation of the fixed bushing during disassembly or assembly of the drive bushing.

[0007] This technical solution solves the problem that fixed bushings and actuator bushings in known actuating arrangements are difficult to remove after assembly. In the present application, the fixed bushing and actuator bushing can be easily removed. The disassembly gap provided between the fixed bushing and the base body facilitates the insertion of special tools for securing the fixed bushing. Simple assembly and disassembly are achieved by sliding or rotating the actuator bushing relative to the fixed bushing, which increases efficiency in both production and maintenance. Furthermore, the disassembly gap enables a compact design while providing sufficient space for tools during assembly and disassembly.

[0008] In a further embodiment of the first aspect, a projection or groove is provided on the outer circumference of the fixed bushing, and a corresponding groove or projection on the inner circumference of the drive bushing. By sliding and / or rotating them, the projection and groove engage to ensure secure locking and separation between the fixed bushing and the drive bushing.

[0009] In a further embodiment of the first aspect, the groove comprises a positioning groove and an anti-rotation groove, both connected to a channel leading to the end face of the fixed bushing or the drive bushing. The projection includes a projection body and an anti-rotation pawl. In the engaged state, the projection body is located in the positioning groove and the anti-rotation pawl is located in the anti-rotation groove.

[0010] This technical design allows for simple construction of projections and grooves, which are cost-effective to manufacture and easy to handle. Furthermore, the anti-rotation pawl improves locking reliability by preventing unintentional release during operation.

[0011] In a further embodiment of the first aspect, the positioning groove is a circular arc-shaped groove extending around the central axis of the fixed bushing or the drive bushing. In the engaged state, the bottom wall of the positioning groove, adjacent to the projection body, lies at a minimal distance from the central axis of the fixed bushing or the drive bushing, thereby engaging the anti-rotation pawl in the anti-rotation groove.

[0012] With this technical solution, the varying radius of the positioning groove causes the protruding body to move along the positioning groove towards the central axis when the drive bushing is displaced or rotated relative to the fixed bushing, thereby pressing the anti-rotation pawl into the anti-rotation groove, thus reducing the risk of unintentional separation between the fixed bushing and the drive bushing.

[0013] In a further embodiment of the first aspect, a protruding structure is provided at the end of the fixed bushing facing the base body.

[0014] This technical solution allows the aforementioned structure to facilitate the use of a tool to fix the rigid bushing, preventing it from rotating during assembly and disassembly. This increases efficiency and reliability.

[0015] In a further embodiment of the first aspect, the above structure comprises several ribs arranged at the end face of the fixed bushing facing the base body, distributed along its circumference.

[0016] This technical solution allows tools to be attached to the ribs to securely hold the fixed bushing and prevent twisting, thus facilitating easier assembly and disassembly of the drive bushing.

[0017] In a further embodiment of the first aspect, a fastening element is arranged on the spindle, on the side of the fixed bushing facing away from the base body. A first elastic element is provided between the fixed bushing and the fastening element. The drive bushing is also connected to a plug-in part, which is linked to the locking arrangement.

[0018] With this technical solution, the fastening element supports the actuating assembly in its operating state and transmits the force acting on the actuating assembly to the spindle. At the same time, together with the intermediate first elastic element, it ensures that the actuating assembly can return to its working position.

[0019] In a further embodiment of the first aspect, a second elastic element is arranged between the insert and the fastening element, the K-value of which is smaller than that of the first elastic element. A flange is formed at the end of the drive bushing facing away from the base body. A circumferential groove is provided at the end of the insert facing away from the base body, in which the flange is slidably guided.

[0020] This technical solution involves the insertion part and the drive bushing being driven by the second and first elastic elements, respectively, to slide relative to the spindle. When the drive bushing moves the fixed bushing relative to the spindle, the second spring pushes the insertion part into motion, while the first spring prevents the fixed bushing from moving. This movement of the insertion part relieves the pressure exerted on the ball, thus unlocking the tool. As soon as the driving force on the drive bushing decreases, the first spring acts in a restoring direction, while the second spring opposes this return. Since the K-value of the first elastic element is greater than that of the second elastic element, the fixed bushing pulls the drive bushing, which in turn returns the insertion part to its original position. The insertion part then pushes the ball back into place, locking the tool.The flange provided at the end of the insert facing away from the base body is connected to the drive bushing, so that the drive bushing can move the insert towards the base body when resetting.

[0021] In a further embodiment of the first aspect, the insert part, when placed against the fastening element, can activate the locking arrangement to fix the tool in the tool holder.

[0022] This technical solution allows the tool to be locked or unlocked in the tool holder by moving the insert relative to the spindle, ensuring simple and convenient configuration.

[0023] In a second aspect, the present application provides a screwdriver that has the disassembly / assembly structure described in the first aspect.

[0024] By using a screwdriver with this disassembly / assembly structure, manufacturing and maintenance are simplified, production efficiency is increased and maintenance costs are reduced.

[0025] In summary, the present application achieves at least one of the following advantageous technical effects: 1. The disassembly / assembly structure of the screwdriver is simple, making the process quick and easy and reducing the difficulty. 2. The disassembly / assembly structure of the screwdriver increases production and maintenance efficiency and reduces costs. 3. The screwdriver allows for convenient maintenance and easy replacement of parts when used with appropriate disassembly / assembly tools. 4. The disassembly / assembly procedure for the screwdriver improves efficiency, enhances the user experience, and promotes acceptance. Brief description of the drawing

[0026] To clarify the technical solutions known from the embodiments of this utility model application or from the prior art, a brief introduction to the drawings required for describing the embodiments or the prior art follows. It should be understood that the drawings described below represent only some embodiments of this utility model application and that those skilled in the art in this field can derive further drawings from the given illustrations without inventive step. Fig. Figure 1 is a schematic diagram of the disassembly / assembly structure for a screwdriver according to the first embodiment of the present application. Fig. Figure 2 is a schematic diagram showing the disassembly / assembly structure for a screw driver according to the first embodiment in conjunction with a screw driver. Fig. Figure 3 is a schematic diagram showing the disassembly / assembly structure for a screwdriver according to the first embodiment in conjunction with a socket. Fig. Figure 4 is an exploded view of the disassembly / assembly structure for a screwdriver according to the first embodiment of the present application. Fig. Figure 5 is a schematic diagram showing the fixed socket of the disassembly / assembly structure for a screwdriver according to the first embodiment. Fig. Figure 6 is a schematic diagram showing the drive socket of the disassembly / assembly structure for a screw driver according to the first embodiment. Fig. Figure 7 is a schematic diagram of the disassembly / assembly structure for a screwdriver according to the second embodiment of the present application. Fig. Figure 8 is a schematic diagram showing the disassembly / assembly structure for a screwdriver according to the second embodiment in conjunction with a socket. Fig. Figure 9 is an exploded view of the disassembly / assembly structure for a screwdriver according to the second embodiment of the present application. Fig. Figure 10 is a schematic diagram of the disassembly / assembly tool according to the present application. Fig. Figure 11 is a schematic diagram illustrating the disassembly / assembly process using the disassembly / assembly tool. Fig. Figure 12 is a schematic diagram of the screw driver according to the present application. Reference symbol:

[0027] 100: Disassembly / assembly structure for a screwdriver; 1: Base body; 2: Spindle; 21: Polygonal recess; 3: Bit; 4: Socket wrench; 5: Locking ball; 6: Sealing assembly; 7: Actuating assembly; 71: Insertion part; 711: First contact surface; 712: Second contact surface; 72: Fixed socket; 721: Fixed projection; 722: Anti-rotation pawl; 723: Projecting structure; 73: Drive socket; 731: Positioning groove; 7311: First channel; 732: Anti-rotation groove; 7321: Second channel; 8: Limiting snap ring; 9: First spring; 91: Second spring; 10: Sealing structure; L: Disassembly gap; 200: Disassembly / assembly tool; 201: Opening; 202: Projection; 203: Handle; 300: Screwdriver; 301: Main unit. Detailed description of the embodiments

[0028] The technical solutions of the embodiments of the present utility model application are described clearly and comprehensively below with reference to the accompanying drawings. It should be understood that the described embodiments represent only some, but not all, embodiments. Based on the embodiments given herein, those skilled in the art in this field can derive further embodiments without inventive step, which are also covered by the scope of protection of the present utility model application.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified or limited, the terms "assembled," "connected," and "coupled" are to be understood in a broad sense. Thus, they can include, for example, permanent connections, detachable connections, or one-piece connections; mechanical or electrical connections; direct or indirect connections via intermediate media; and internal connections between two elements. For those skilled in the art, the precise meaning of these terms will be clear from the specific applications.

[0030] Furthermore, it should be noted in the description of this application that the terms "top", "bottom", "left", and "right" are based on the positional or spatial relationship shown in the illustrations. They serve solely to clarify and simplify the description and do not imply that the device or element in question must have a specific orientation or be designed and operated in a specific orientation. Therefore, they are not to be interpreted as a limitation of this application.

[0031] The embodiments of the present application are explained in detail below with reference to the accompanying drawings. The features described in the following embodiments can be combined with one another, provided there are no conflicts. Example One

[0032] The core of this embodiment is to provide a disassembly / assembly structure for a screwdriver that enables more convenient assembly and disassembly and reduces production costs.

[0033] With reference to Fig. 1-4 comprises a disassembly / assembly structure for a screwdriver, a base body 1, a spindle 2, a locking arrangement, a sealing arrangement 6, and an actuating arrangement 7. In this embodiment, the locking arrangement is designed as a locking ball 5.

[0034] Specifically, a through-hole is provided at one end of the base body 1 for installing the spindle 2. One end of the spindle 2 is located within the inner cavity of the base body 1, while the other end protrudes from it. In other words, the through-hole rotatably connects the spindle 2 to the base body 1, allowing the output power generated by the motor located in the base body 1 to be transmitted via the spindle 2 to the next component for efficient power output. A tool holder is provided at the end of the spindle facing away from the base body 1. This tool holder is a polygonal recess on the spindle 2 that extends along its axis to accommodate a bit 3. The bit 3 is temporarily secured by the polygonal recess. A polygonal column is arranged around the polygonal recess, serving to accommodate a socket 4.In this device, the motor transfers power to the spindle 2, which in turn drives the bit 3 to enable power to be drawn from the device.

[0035] Elongated holes are arranged around the polygonal recess, extending radially through the spindle 2 to accommodate two locking balls 5. These elongated holes penetrate the polygonal recess. The locking balls 5 can move back and forth along these holes in the radial direction of the spindle 2 to lock or release the bit 3. The actuating assembly 7, arranged around the spindle 2, bears against the locking balls 5. By interacting with the locking balls 5, the actuating assembly 7 enables the bit 3 to be locked or unlocked.

[0036] The actuating assembly 7 is fitted over the outer circumference of the spindle 2 and slidably connected to it. The actuating assembly 7 comprises a drive bushing 73 and a fixed bushing 72, which are detachably connected to each other. When the actuating assembly 7 is moved relative to the spindle 2, it can be positioned in a locked and an unlocked state. In the locked state, the actuating assembly 7 is connected to the locking assembly, which secures the tool in the tool holder. In the unlocked state, the locking assembly releases the tool secured in the tool holder. A disassembly gap L is provided between the end of the fixed bushing 72 facing the base body 1 and the base body 1. This disassembly gap L serves to limit the rotation of the fixed bushing 72, thereby facilitating the assembly and disassembly of the drive bushing 73.

[0037] The actuating arrangement comprises an insert part 71 of the drive bushing, a fixed bushing 72, and a drive bushing 73. The insert part 71 is arranged on the outer circumference of the spindle 2. In the locked state, its inner circumferential surface rests against the locking ball 5. The fixed bushing 72 is arranged on the outer circumference of the spindle 2, closer to the base body 1. The drive bushing 73 is fitted over the insert part 71 and the fixed bushing 72. A fastening element is fixedly attached to the spindle 2. A first elastic element, namely a first spring 9, is arranged between the fixed bushing 72 and the fastening element, which exerts a restoring force on the fixed bushing 72 in the direction of the base body 1. In this embodiment, the drive bushing 73 and the insert part 71 are firmly connected to each other by an interference fit. The insert part 71 has a first contact surface 711 and a second contact surface 712.The distance of the second contact surface 712 to the central axis of the spindle 2 is greater than that of the first contact surface 711. In the locked state, the first contact surface 711 of the insert part 71 rests against the locking ball 5, pressing it into the polygonal recess 21 and thus locking the bit. In the unlocked state, when the bit 3 is removed, the drive bushing 73 is moved away from the base body 1, so that the first contact surface 711 loses contact with the locking ball 5. When the bit 3 is withdrawn, the ball 5 moves into the space defined by the second contact surface 712, thereby exiting the polygonal recess 21 and unlocking the bit. As soon as the force on the drive bushing 73 decreases, the first spring 9 pushes the fixed bushing 72 back towards the base body 1. The fixed bushing 72 in turn moves the drive bushing 73 and the insert part 71 back to their initial positions.

[0038] The interaction of the insert part 71, the fixed socket 72 and the drive socket 73 ensures precise positioning of the locking ball 5.

[0039] Since the drive bushing 73 and the insert 71 are firmly connected by an interference fit, the fixed bushing 72, which is previously installed around the spindle 2, can be locked or unlocked by simply rotating the drive bushing 73. This allows for quick and precise assembly and disassembly of the actuating assembly 7, simplifies operation, and increases user comfort. In practice, there are no particular restrictions regarding the arrangement of the insert 71, fixed bushing 72, and drive bushing 73, provided the described technical effects are achieved.

[0040] In this embodiment, rotating the drive bushing 73 in one direction locks it with the fixed bushing 72, while rotating it in the opposite direction unlocks it. In practice, the directions of rotation are not strictly defined and can be selected as needed. The crucial point is to determine the direction of rotation according to the motor's direction of travel so that the drive bushing 73 does not easily come loose during operation.

[0041] With reference to Fig. 5 and Fig. 6. On the outer circumference of the fixed bushing 72, either a projection or a recess is provided, while on the inner circumference of the drive bushing 73, a corresponding recess or projection is provided. By sliding and / or rotating, these projections and recesses engage to lock or separate the fixed bushing 72 and the drive bushing 73. The recesses comprise a positioning groove 731 and an anti-rotation groove 732, both of which are connected to the end face of the fixed bushing 72 or the drive bushing 73 via channels. The projections include a fixed projection and an anti-rotation pawl 722. In the locked position between the fixed bushing 72 and the drive bushing 73, the fixed projection is located in the positioning groove 731 and the anti-rotation pawl 722 is located in the anti-rotation groove 732.The positioning groove 731 is a circular arc groove extending around the central axis of the fixed bushing 72 or the drive bushing 73. When the fixed bushing 72 and the drive bushing 73 are locked, the bottom wall of the positioning groove 731, which contacts the fixed projection, is at a minimal distance from the central axis, allowing the anti-rotation pawl 722 to engage in the anti-rotation groove 732. In other words, the radius of the positioning groove 731 decreases along the locking direction to a minimum value at the point of contact with the projection, so that the drive bushing 73 and the fixed bushing 72 perform a radial relative movement and the anti-rotation pawl 722 engages in the anti-rotation groove 732.

[0042] With reference to Fig. 5 and Fig. The fixed bushing 72 has a fixed projection 721 and an anti-rotation pawl 722 on its outer circumference. A positioning groove 731 and an anti-rotation groove 732 are provided on the inner circumference of the drive bushing 73. The positioning groove 731 engages in the fixed projection 721, while the anti-rotation groove 732 interacts with the anti-rotation pawl 722. A projecting structure 723 is formed at the end of the fixed bushing 72 facing the base body 1. This structure consists of several ribs arranged along the circumference. These ribs are evenly distributed, but in practice, an even distribution is not required as long as anti-rotation protection is ensured. By providing a detent structure on the outer circumference of the fixed bushing 72, the fixed bushing 72 and the drive bushing 73 can be mutually interlocked.This detent structure can consist of the fixed projection 721 and the anti-rotation pawl 722 or include other elements, provided that a secure locking is achieved between the fixed bushing 72 and the drive bushing 73.

[0043] In one embodiment, the fixed projection 721 is designed as a rectangular structure with a curved contour extending around the outer circumference of the fixed bushing 72, and the anti-rotation pawl 722 is a frustoconical structure projecting radially from the fixed bushing 72. The anti-rotation groove 732 is a circular recess. In practice, these shapes are not rigidly defined as long as the desired technical effects are achieved.

[0044] It should be noted that the engagement of the positioning groove 731 with the fixed projection 721 constitutes a first stage of locking between the fixed socket 72 and the drive socket 73, while the engagement of the anti-rotation groove 732 with the anti-rotation pawl 722 forms a second stage. The combination of both locking mechanisms achieves a double locking action, which reliably connects the fixed socket 72 and the drive socket 73 and securely fixes the bit 3.

[0045] In another embodiment, various locking grooves are provided on the fixed bushing 72, and corresponding locking elements are located on the drive bushing 73. By aligning these locking grooves with the locking elements, the fixed bushing 72 and the drive bushing 73 are connected to each other. In practical application, there are no restrictions regarding the type, position, or dimensions of the locking structures, as long as the desired technical effect is achieved.

[0046] Based on the above embodiments, a first channel 7311 is provided on the inner circumference of the drive bushing 73, which is connected to the positioning groove 731, and a second channel 7321, which is connected to the anti-rotation groove 732. One end of both the first channel 7311 and the second channel 7321 is connected to the end face of the drive bushing 73.

[0047] Furthermore, the first channel 7311 and the second channel 7321 are configured in an inverted L-shape. The first channel 7311 fits the fixed projection 721, allowing the latter to move along the first channel 7311. The second channel 7321 fits the anti-rotation pawl 722, allowing the latter to move along the second channel 7321.

[0048] It should be noted that the arrangement of the first channel 7311 and the second channel 7321 on the drive bushing 73 allows the fixed projection 721 to be inserted into the drive bushing 73 along the first channel 7311, and the anti-rotation pawl 722 to be inserted along the second channel 7321. The radius of the bottom wall of the first channel 7311 decreases in the fastening direction and is minimal at the locking position. When the fixed projection 721 reaches the locking position (i.e., the end of the first channel 7311), the anti-rotation pawl 722 is pressed into the anti-rotation groove 732 of the drive bushing 73. By using the disassembly / assembly tool 200, which secures the fixed bushing 72, engagement between the fixed bushing 72 and the drive bushing 73 can be achieved by rotating the drive bushing 73 forward.

[0049] In a preferred embodiment, the positioning groove 731 and the anti-rotation groove 732 are arranged at the ends of the first channel 7311 and the second channel 7321, respectively. In this way, the first channel 7311 and the second channel 7321 provide a first positioning, while the positioning groove 731 and the anti-rotation groove 732 enable a second positioning. This two-stage positioning achieves effective locking between the fixed bushing 72 and the drive bushing 73. In practice, however, there are no restrictions regarding the precise arrangement of the positioning groove 731 and the anti-rotation groove 732 within the first channel 7311 and the second channel 7321, as long as the desired technical effects are achieved.

[0050] The self-locking and disassembly process of the device proceeds as follows: The anti-rotation pawl 722 and the fixed projection 721 on the fixed bushing 72 are inserted into the drive bushing 73 via the first channel 7311 and the second channel 7321 in the drive bushing 73, according to the specified assembly direction. After insertion, a relatively small gap is created between the fixed bushing 72 and the base body 1. The disassembly / assembly tool is used in this gap to fix the protruding structure 723 of the fixed bushing 72, thus preventing rotation of the fixed bushing 72. By rotating the drive bushing 73, the anti-rotation pawl 722 on the fixed bushing 72 engages in the anti-rotation groove 732. Simultaneously, the fixed projection 721 of the fixed bushing 72 engages in the positioning groove 731 of the drive bushing 73, thereby limiting axial movement.Under the action of the first spring 9, the drive bushing 73 and the fixed bushing 72 remain reliably and self-locking in position. For disassembly, the disassembly / assembly tool is again inserted into the gap between the fixed bushing 72 and the base body 1 to secure the fixed bushing 72. The drive bushing 73 is then rotated in the opposite direction to disengage the anti-rotation pawl 722 from the anti-rotation groove 732 of the drive bushing 73. Once the end position in the opposite direction is reached, the fixed bushing 72 can be pulled out axially.

[0051] In the above-mentioned embodiments, at least two fixed projections 721 and at least two anti-rotation pawls 722 are provided. The positioning grooves 731 and the anti-rotation grooves 732 correspond to the fixed projections 721 and the anti-rotation pawls 722.

[0052] It is understood that in an embodiment, two, three or more fixed projections 721 and anti-rotation pawls 722 may be present, with a corresponding number of positioning grooves 731 and anti-rotation grooves 732. Several fixed projections 721 and anti-rotation pawls 722 may be arranged alternately along the circumference of the fixed bushing 72, or the fixed projections 721 may also be arranged side by side, without any limitation.

[0053] In another embodiment, several fixed projections 721 and several anti-rotation pawls 722 can also be arranged alternately along the axial direction of the fixed bushing 72.

[0054] With reference to Fig. In a preferred embodiment, 1-6 the second end of the insertion part 71 of the drive bushing rests against a limiting snap ring 8, and a first spring 9 is arranged between the limiting snap ring 8 and the fixed bushing 72.

[0055] It should be noted that the self-locking interaction of the drive bushing 73 and the fixed bushing 72 achieves mutual positioning to prevent disengagement. The limiting snap ring 8 prevents the actuating assembly 7 from detaching from the spindle 2. The first spring 9 ensures that the actuating assembly 7 returns to its initial position after the bit 3 is unlocked or locked. The locking balls 5 are positioned via the drive bushing 73 and the insert 71 to achieve self-locking of the bit 3 in the spindle 2. When the bit 3 is unlocked and removed, pressing the drive bushing 73 causes the locking assembly to move axially towards the bit 3, thereby moving the insert 71 out of the positioning area of ​​the locking balls 5. This gives the locking balls 5 radial clearance within the insert 71.After the bit 3 is removed, the locking balls 5 return to their initial position when the drive bushing 73 is released under the action of the first spring 9.

[0056] In this scenario, the spindle 2 is designed as a T-shaped shaft, and an annular groove for receiving an O-ring is provided on the outer circumference of the first end of the spindle 2.

[0057] It is understood that a sealing structure 10 is provided on the outer circumferential surface of the first end of the spindle 2. The sealing structure 10 comprises a snap ring and an O-ring. The snap ring secures the socket wrench 4, while the O-ring seals the transition between the spindle 2 and the socket wrench 4. In this embodiment, the spindle 2 and the socket wrench 4 are thus firmly connected and sealed. In practice, however, the design is not limited to this, provided the desired technical effect is achieved.

[0058] In the above-mentioned embodiments, at least two sets of elongated holes are provided, each set accommodating at least two locking balls 5.

[0059] It should be noted that the number of elongated holes can be selected according to the actual requirements. There are no strict restrictions regarding the diameter of these elongated holes, as long as they can accommodate the locking balls 5. The number of locking balls 5 is also variable, for example, one or two groups, without restriction. Crucially, in the locked state, the first contact surface 711 rests against the ball furthest from the center of the spindle 2, thus partially pressing the ball closer to the center of the spindle 2 into the polygonal recess 21. In the unlocked state, the insert 71 shifts relative to the spindle 2 such that the second contact surface 712 aligns with the sliding groove, allowing the ball closer to the center of the spindle 2 to fully engage in the sliding groove.

[0060] Based on the above embodiments, a sealing arrangement 6 is provided on the outer circumferential surface of the spindle 2 to seal the spindle 2 against the base body 1.

[0061] It is understood that the sealing assembly 6 comprises a snap ring and an O-ring. The snap ring secures the spindle 2 to the base body 1, while the O-ring seals the gap between the spindle 2 and the base body 1. In practice, however, there are no restrictions regarding the components used for sealing and securing the spindle 2, as long as the desired technical effect is achieved.

[0062] In summary, the disassembly / assembly structure for a screwdriver provided in the present application can serve as a multifunctional clamping structure that functions as both an impact wrench and an impact screwdriver. It can securely hold a 12.7 mm or 19 mm socket wrench 4 and simultaneously hold a 6.35 mm hex screwdriver bit 3. This product enables a more convenient method of assembly and disassembly, thus reducing manufacturing and maintenance costs. Example Two

[0063] With reference to Fig. In embodiment 7-9, unlike embodiment one, a second elastic element, namely a second spring 91, is arranged between the limiting snap ring 8 and the insert part 71. The first spring 9 and the second spring 91 are located on opposite sides of the limiting snap ring 8. The K-value of the first spring 9 is greater than that of the second spring 91.

[0064] During operation, the first spring 9 pushes the fixed bushing 72 towards the base body 1, while the second spring 91 pushes the insert 71 away from the base body 1. Since the force of the first spring 9 is greater than that of the second spring 91, the actuating arrangement 7 remains in a locked position close to the base body 1 under free conditions. If the drive bushing 73 is moved away from the base body 1, the first spring 9 is compressed, and the second spring 91 pushes the insert 71 away from the base body 1 into the unlocked state. This embodiment offers the advantage that the insert 71 and the drive bushing 73 can be slidably connected to each other, which reduces wear from impacts and ensures that the unlocked state is reliably reached. In embodiment one, the insert 71 and the drive bushing 73 are press-fitted together.Prolonged exposure to shocks could lead to wear and tear, resulting in an unreliable connection. This would prevent the drive bushing 73 from effectively moving the insert 71 away from the base body 1 and thus preventing it from unlocking. In this embodiment, the insert 71 and drive bushing 73 can be optionally press-fitted or slidably connected to ensure reliable unlocking and locking functionality.

[0065] With reference to Fig. 10 and Fig. In embodiments 1 and 2, a disassembly / assembly tool 200 for the drive bushing 73 serves to lock or unlock the disassembly / assembly structure of the screwdriver. The disassembly / assembly tool 200 has an opening 201 for keeping the spindle free and a projection or recess for holding the fixed bushing against rotation. In this embodiment, a projection 202 is provided. At least a portion of the thickness of the disassembly / assembly tool 200 is less than the disassembly gap L of the screwdriver.

[0066] With reference to Fig. 3, Fig. 5, Fig. 6 and Fig. 10: When removing the actuating assembly 7, the fixed bushing 72 is inserted into the drive bushing 73. In the disassembly gap L between the fixed bushing 72 and the base body 1, the projection 202 of the disassembly / assembly tool 200 engages in the protruding structure 723 of the fixed bushing 72 and secures it. Simultaneously, the drive bushing 73 is rotated forward to lock the fixed bushing 72 and the drive bushing 73 together. At this point, the insert 71 is tightened radially around the spindle 2, thereby achieving a locked position.

[0067] For disassembly, the disassembly / assembly tool 200 is reinserted into the disassembly gap L between the fixed bushing 72 and the base body 1 to secure the fixed bushing 72. The drive bushing 73 is then rotated in the opposite direction to unlock and separate it from the fixed bushing 72. Example Three

[0068] With reference to Fig. 12 discloses this embodiment a screw driver 300 comprising the disassembly / assembly structure 100 described in embodiment one or two and a main unit 301.

[0069] It should be noted that in this description, relational terms such as "first" and "second" serve solely to distinguish between different elements and do not imply any actual relationships or sequences.

[0070] Each embodiment described in this text will be explained successively, with each embodiment focusing on its differences from the others. Reference may be made to identical or similar parts between the different embodiments.

[0071] The above descriptions provide a detailed account of a disassembly / assembly structure for a screwdriver, as provided by the present utility model. Specific examples illustrate the principles and implementations of the utility model. The description of the aforementioned embodiments serves only to clarify the methods and core concepts of the utility model. Experts in this field can, based on the principles set forth, make various improvements and modifications without deviating from the basic ideas of this utility model, which also fall within the scope of protection of the accompanying claims.

Claims

[1] Disassembly / assembly structure for a screw driver, characterized by that it comprises: a base body; a spindle which is rotatably connected to the base body, wherein a tool holder is provided at the end of the spindle facing away from the base body, and a locking arrangement is attached to the spindle; an actuating arrangement which is slipped over the outer circumference of the spindle and slidably connected thereto, wherein the actuating arrangement comprises a drive bushing and a fixed bushing which are detachably connected to one another; wherein a disassembly gap is provided between the end of the fixed bushing facing the base body and the base body in order to restrict the rotation of the fixed bushing and thus enable the assembly or disassembly of the drive bushing. [2] Disassembly / assembly structure according to claim 1, characterized bythat a projection or recess is provided on the outer circumference of the fixed bushing and a matching recess or projection is provided on the inner circumference of the drive bushing; the projection and recess engage with each other in a sliding and / or rotational engagement to enable locking and disengagement between the fixed bushing and the drive bushing. [3] Disassembly / assembly structure according to claim 2, characterized by that the recess has a positioning groove and an anti-rotation groove; both the positioning groove and the anti-rotation groove are connected to channels which lead to an end face of the fixed bushing or the drive bushing; the projection comprises a projection body and an anti-rotation pawl; in the locked state of the fixed bushing and the drive bushing, the projection body is located in the positioning groove and the anti-rotation pawl is located in the anti-rotation groove. [4] Disassembly / assembly structure according to claim 3, characterized by that the positioning groove is a circular arc-shaped groove arranged around the central axis of the fixed bushing or the drive bushing; in the locked state of the fixed bushing and the drive bushing, the distance from the bottom wall of the positioning groove abutting the projection body to the central axis is minimal, whereby the anti-rotation pawl can enter the anti-rotation groove. [5] Disassembly / assembly structure according to one of claims 1 to 4, characterized by that a protruding structure is provided at the end of the fixed bushing facing the base body. [6] Disassembly / assembly structure according to claim 5, characterized by that the projecting structure has a plurality of ribs arranged along the circumferential surface, which are distributed on the end face of the fixed bushing facing the base body. [7] Disassembly / assembly structure according to one of claims 1 to 4, characterized by that a fastening element is arranged on the spindle, on the side of the fixed bushing facing away from the base body; a first elastic element is provided between the fixed bushing and the fastening element; the drive bushing is further connected to a plug-in part which is connected to the locking arrangement. [8] Disassembly / assembly structure according to claim 7, characterized by that a second elastic element is provided between the plug-in part and the fastening element, the K-value of which is smaller than that of the first elastic element; a flange is formed on the end of the drive bushing facing away from the base body; a circumferential groove is provided on the end of the plug-in part facing away from the base body, which groove is slidably connected to the flange. [9] Disassembly / assembly structure according to claim 7, characterized bythat when the insert part is in contact with the fastener, it can actuate the locking arrangement to fix the tool in the tool holder. [10] Screw driver, characterized by that it comprises the disassembly / assembly structure according to one of claims 1 to 9.

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