Multi-mode quick-change chuck impact electric drill

Abstract

This utility model relates to a multi-mode quick-change chuck impact drill, characterized by including an impact drill, on which a connector is installed. The connector connects to a square chuck or a triangular chuck according to the interface of the drill bit being used. Both the square chuck and the triangular chuck have a bidirectional screw rotatably connected inside. Two extrusion plates are slidably connected inside the square chuck, and one extrusion plate is slidably connected inside the triangular chuck. Guide rods are connected inside both the square chuck and the triangular chuck. The extrusion plates are threadedly connected to the bidirectional screws, and the extrusion plates are slidably connected to the guide rods. Both the square chuck and the triangular chuck are equipped with adjustment components for adjusting the drill bit connection distance. The advantage is that by quickly switching between the modular square chuck and the triangular chuck via the connector, native adaptation to various non-standard drill bits such as square shank and triangular shank is achieved, eliminating system gaps caused by third-party adapter sleeves, achieving compatibility with multiple types of drilling tools, and overcoming the compatibility limitations of the device.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to a multi-mode quick-change chuck impact drill. Background Technology

[0002] An impact drill is a power tool that combines rotary cutting and axial impact functions, and is widely used in drilling operations on hard and brittle materials such as concrete and masonry. Its core function relies on the drill bit tip periodically impacting the bottom of the hole while rotating at high speed to achieve a breaking effect. Different types of drill bits have different shank shapes, and the shank shape directly determines the mechanical coupling method between the drill bit and the drill body and the power transmission efficiency.

[0003] Traditional impact drills use a fixed chuck, with a one-to-one correspondence between its clamping mechanism and the drill shank interface. When users need to adapt to different shank drill bits, they must completely disassemble the original chuck and replace it with a dedicated one. This process relies on auxiliary tools such as wrenches and takes an average of more than two minutes. Frequent disassembly and assembly not only reduces work efficiency but also causes wear on the chuck's locking threads, leading to a decrease in clamping force.

[0004] Existing drill bit depth adjustment technologies suffer from multiple limitations. Their adjustment methods primarily rely on adding, removing, or replacing physical components, resulting in insufficient operational precision and an inability to achieve dynamic locking. In impact-based operating scenarios, the drill shank and clamping components are prone to irregular radial and axial displacements due to accumulated manufacturing tolerances. The current technological system faces a core contradiction: the adapter structure added to expand equipment compatibility significantly weakens torque transmission efficiency while exacerbating operational vibrations; the precision of depth adjustment and structural stability are inversely related, with high-precision adjustment mechanisms inherently lacking in impact resistance, leading to significant positional shifts during prolonged high-frequency impact operations. Furthermore, there is a fundamental conflict between elastic buffering and rigid locking techniques. While elastic materials can alleviate vibration, they present durability issues, while pure metal rigid clamping, although ensuring locking strength, easily damages the drill shank surface, making technological integration difficult. Utility Model Content

[0005] The technical problems to be solved by this utility model are poor compatibility and low operation efficiency. It provides a multi-mode quick-change chuck impact drill to solve the above problems.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a multi-mode quick-change chuck impact drill, including an impact drill, a connector, a square chuck, a triangular chuck, a pressing plate, a guide rod, a bidirectional screw, and a stabilizing component. The impact drill is equipped with a connector, which is connected to either the square chuck or the triangular chuck according to the interface of the drill bit being used. Both the square chuck and the triangular chuck are rotatably connected to a bidirectional screw. Two pressing plates are slidably connected inside the square chuck, and one pressing plate is slidably connected inside the triangular chuck. Both the square chuck and the triangular chuck are connected to a guide rod. The pressing plate is threadedly connected to the bidirectional screw, and the pressing plate is slidably connected to the guide rod. Both the square chuck and the triangular chuck are provided with an adjusting component for adjusting the drill bit connection distance.

[0007] A further preferred embodiment of this utility model is as follows: the adjustment assembly includes an adjustment rod, a gear, a rack, a top plate, and a bolt. Both the square and triangular clamps have racks slidably connected inside. The adjustment rod is rotatably connected within the square and triangular clamps. A gear is connected to the bottom of the adjustment rod, meshing with the rack. The rack is connected to the top plate facing the connection port. A bolt is slidably connected to the adjustment rod off-axis. Several slots are formed at the top of both the square and triangular clamps, surrounding the central axis of the adjustment rod. The bottom of the bolt engages with the slots for limiting.

[0008] A further preferred embodiment of this utility model is as follows: it also includes a contact plate and a return spring. The contact plate is provided on the side of the extrusion plate that contacts the drill bit, and a return spring is provided between the extrusion plate and the contact plate. One end of the return spring is connected to the contact plate, and the other end is connected to the extrusion plate.

[0009] A further preferred embodiment of this utility model is: it also includes a guide ring, and the top of the slot is connected to a guide ring with an inclined surface facing the center point of the slot.

[0010] A further preferred embodiment of this utility model is: it also includes a magnet, a magnet is connected to the middle of the bolt rod, the top of the adjusting rod is made of magnetic material, and the magnet is magnetically connected to the adjusting rod.

[0011] A further preferred embodiment of this utility model is: it also includes a tension spring, a tension spring is sleeved on the guide rod inside the square clamp, the two ends of the tension spring are respectively connected to two extrusion plates, and the extrusion plates inside the square clamp are respectively threaded to the two ends of the bidirectional screw.

[0012] A further preferred embodiment of this utility model is: it also includes a cover plate, and the square clamp and the triangular clamp are both connected to the cover plate, the cover plate blocking the gap between the extrusion plate and the contact plate.

[0013] A further preferred embodiment of this utility model is: it also includes a buffer pad, and the top plate is connected to the side facing the port with the buffer pad.

[0014] Compared with existing technologies, the advantages of this utility model are: by quickly switching between modular square chucks and triangular chucks via a connector, it achieves native compatibility with various non-standard drill bits such as square shank and triangular shank, eliminates system gaps caused by third-party adapter sleeves, and achieves compatibility with multiple types of drill tools, thus overcoming the compatibility limitations of the device; through the magnetic locking adjustment mechanism and spring-assisted separation system, it shortens the chuck replacement time, improves depth adjustment accuracy, and enables one-handed tool-free operation, ultimately achieving a comprehensive efficiency improvement and solving the problems of cumbersome disassembly and assembly and inefficient adjustment. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram showing the connection relationship between the connector and the triangular clamp of this utility model;

[0018] Figure 3 This is a cross-sectional view showing the connection relationship between the extrusion plate and the bidirectional screw of this utility model;

[0019] Figure 4 This is a cross-sectional view showing the connection relationship between the gear and rack of this utility model;

[0020] Figure 5 This is a cross-sectional view showing the connection relationship between the bolt and the magnet in this utility model.

[0021] Figure 6 This is a cross-sectional view showing the connection relationship between the reset spring and the contact plate of this utility model.

[0022] In the diagram: 1. Impact drill, 2. Connector, 3. Square chuck, 4. Triangular chuck, 5. Extrusion plate, 6. Guide rod, 7. Double-acting screw, 8. Adjusting rod, 9. Gear, 10. Rack, 11. Top plate, 12. Slot, 13. Bolt rod, 14. Contact plate, 15. Return spring, 16. Guide ring, 17. Magnet, 18. Tension spring, 19. Cover plate, 20. Buffer pad. Detailed Implementation

[0023] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0024] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0025] This embodiment mainly describes the structure of the impact drill, as follows:

[0026] A multi-mode quick-change chuck impact drill, such as Figures 1-6 As shown, the assembly includes an impact drill 1, a connector 2, a square chuck 3, a triangular chuck 4, a clamping plate 5, a guide rod 6, a bidirectional screw 7, and a stabilizing component. The impact drill 1 is equipped with the connector 2, which connects to either the square chuck 3 or the triangular chuck 4 depending on the interface of the drill bit. Both the square chuck 3 and the triangular chuck 4 are rotatably connected to the bidirectional screw 7. Two clamping plates 5 are slidably connected inside the square chuck 3, and one clamping plate 5 is slidably connected inside the triangular chuck 4. Both the square chuck 3 and the triangular chuck 4 are connected to the guide rod 6. The clamping plate 5 is threadedly connected to the bidirectional screw 7, and the clamping plate 5 is slidably connected to the guide rod 6. Both the square chuck 3 and the triangular chuck 4 are equipped with adjusting components for adjusting the drill bit connection distance. When the drill bit is inserted, the drill shank pushes the contact plate 14 to compress the return spring 15 to form a pre-clamping. The bidirectional screw 7 is rotated to drive the clamping plate 5 to slide along the guide rod 6, achieving rigid locking. In the square chuck 3, the bidirectional screw 7 synchronously pushes the two extrusion plates 5 to compress the tension spring 18, while in the triangular chuck 4, a single extrusion plate 5 directly presses it.

[0027] like Figures 3-5 As shown, the adjustment assembly includes an adjustment rod 8, a gear 9, a rack 10, a top plate 11, and a bolt 13. The rack 10 is slidably connected inside both the square chuck 3 and the triangular chuck 4. The adjustment rod 8 is rotatably connected inside the square chuck 3 and the triangular chuck 4. The gear 9 is connected to the bottom of the adjustment rod 8, and the gear 9 meshes with the rack 10. The top plate 11 is connected to the rack 10 facing the connection port end. The bolt 13 is slidably connected to the adjustment rod 8 off-axis. Several slots 12 are opened at the top of both the square chuck 3 and the triangular chuck 4. The slots 12 surround the central axis of the adjustment rod 8. The bottom of the bolt 13 is limited and engaged with the slots 12. Pulling the bolt 13 disengages it from the slots 12, and rotating the adjustment rod 8 drives the gear 9 to rotate. The rack 10 causes the top plate 11 and the buffer pad 20 to move axially, thereby adapting to different drill shank lengths.

[0028] like Figure 4 and Figure 6As shown, it also includes a contact plate 14 and a return spring 15. The contact plate 14 is provided on the side of the extrusion plate 5 that contacts the drill bit, and a return spring 15 is provided between the extrusion plate 5 and the contact plate 14. One end of the return spring 15 is connected to the contact plate 14, and the other end is connected to the extrusion plate 5. The extrusion plate 5 is connected to the contact plate 14 through the return spring 15. When the drill bit is inserted, the contact plate 14 is pressed and moves backward to store energy. After the drill bit is pulled out, the return spring 15 pushes the contact plate 14 back to the initial position.

[0029] like Figure 5 As shown, it also includes a guide ring 16. The top of the slot 12 is connected to a guide ring 16 with an inclined surface. The inclined surface faces the center point of the slot 12, and the inclined surface of the guide ring 16 guides the bolt 13 to accurately enter the slot.

[0030] like Figure 5 As shown, it also includes a magnet 17, with the middle of the bolt 13 connected to the magnet 17, and the top of the adjusting rod 8 is made of magnetic material, with the magnet 17 magnetically connected to the adjusting rod 8.

[0031] like Figure 4 As shown, it also includes a tension spring 18. The tension spring 18 is sleeved on the guide rod 6 inside the square chuck 3. The two ends of the tension spring 18 are respectively connected to two extrusion plates 5. The extrusion plates 5 inside the square chuck 3 are respectively threaded to the two ends of the bidirectional screw 7. The tension spring 18 assists the two extrusion plates 5 to separate synchronously in the square chuck 3.

[0032] like Figure 4 As shown, it also includes a cover plate 19. The square chuck 3 and the triangular chuck 4 are both connected to the cover plate 19. The cover plate 19 blocks the gap between the extrusion plate 5 and the contact plate 14, and prevents debris from entering, thus extending the service life of the transmission components.

[0033] like Figure 4 As shown, it also includes a buffer pad 20. The top plate 11 is connected to the side facing the port with the buffer pad 20, which absorbs the impact at the end of the drill shank.

[0034] The operator can quickly change between a square chuck 3 and a triangular chuck 4 via the connector 2, depending on the shape of the drill bit shank interface. When the drill bit is inserted into the chuck port, the drill shank pushes the contact plate 14 towards the pressing plate 5, compressing the return spring 15 to generate an initial preload. Subsequently, the bidirectional screw 7 is rotated, and its thread drives the pressing plate 5 to slide axially along the guide rod 6, causing the pressing plate 5 to approach the center of the drill bit for rigid clamping. At this time, the return spring 15 is further compressed to form an elastic buffer layer. When the two pressing plates 5 in the square chuck 3 move inward synchronously, they compress the tension spring 18. In the triangular chuck 4, a single pressing plate 5 directly locks in place, achieving dual stable clamping.

[0035] For drill bits of different lengths, pulling the bolt rod 13 upwards disengages it from the slot 12 to release the magnetic lock between the magnet 17 and the adjusting rod 8. Rotating the bolt rod 13 causes the adjusting rod 8 to rotate. The gear 9 at the bottom of the adjusting rod 8 drives the rack 10 to move axially, pushing the top plate 11 and its buffer pad 20 to adjust to the target depth position. When the bolt rod 13 is pressed down, the inclined surface of the guide ring 16 guides the bolt rod 13 to precisely engage with the slot 12. The elastic deformation of the buffer pad 20 compensates for the assembly gap, and the magnet 17 re-attaches to the top of the adjusting rod 8 to form an anti-rotation lock, ensuring that the working length of the drill bit is precisely controllable.

[0036] When disassembling the drill bit, rotate the bidirectional screw 7 in the opposite direction. The extrusion plate 5 moves outward along the guide rod 6 to release the clamping force. The tension spring 18 inside the square chuck 3 rebounds to assist the extrusion plate 5 in separating. After the drill bit is pulled out, the reset spring 15 pushes the contact plate 14 to reset. The cover plate 19 continuously blocks the gap between the extrusion plate 5 and the contact plate 14 to prevent debris from entering the transmission components.

[0037] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] The above provides a detailed description of the multi-mode quick-change chuck impact drill provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from its principle, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A multi-mode quick-change chuck impact drill, characterized in that: The device includes an impact drill (1), a connector (2), a square chuck (3), a triangular chuck (4), a pressing plate (5), a guide rod (6), a double screw (7), and a stabilizing component. The impact drill (1) is equipped with a connector (2), which connects to either the square chuck (3) or the triangular chuck (4) depending on the interface of the drill bit. Both the square chuck (3) and the triangular chuck (4) are rotatably connected to the double screw (7). Two pressing plates (5) are slidably connected inside the square chuck (3), and one pressing plate (5) is slidably connected inside the triangular chuck (4). Both the square chuck (3) and the triangular chuck (4) are connected to the guide rod (6). The pressing plate (5) is threadedly connected to the double screw (7), and the pressing plate (5) is slidably connected to the guide rod (6). Both the square chuck (3) and the triangular chuck (4) are equipped with an adjusting component for adjusting the drill bit connection distance.

2. The multi-mode quick-change chuck impact drill according to claim 1, characterized in that: The adjustment assembly includes an adjustment rod (8), a gear (9), a rack (10), a top plate (11), and a bolt (13). The rack (10) is slidably connected inside the square chuck (3) and the triangular chuck (4). The adjustment rod (8) is rotatably connected inside the square chuck (3) and the triangular chuck (4). The gear (9) is connected to the bottom of the adjustment rod (8). The gear (9) meshes with the rack (10). The top plate (11) is connected to the rack (10) facing the connection port end. The bolt (13) is slidably connected to the adjustment rod (8) off-axis. Several slots (12) are opened on the top of the square chuck (3) and the triangular chuck (4). The slots (12) surround the central axis of the adjustment rod (8). The bottom of the bolt (13) is limited and engaged with the slots (12).

3. The multi-mode quick-change chuck impact drill according to claim 2, characterized in that: It also includes a contact plate (14) and a return spring (15). The side of the extrusion plate (5) that contacts the drill bit is provided with a contact plate (14), and a return spring (15) is provided between the extrusion plate (5) and the contact plate (14). One end of the return spring (15) is connected to the contact plate (14), and the other end is connected to the extrusion plate (5).

4. A multi-mode quick-change chuck impact drill according to claim 3, characterized in that: It also includes a guide ring (16), and the top of the slot (12) is connected to a guide ring (16) with a bevel, the bevel facing the center point of the slot (12).

5. A multi-mode quick-change chuck impact drill according to claim 2, characterized in that: It also includes a magnet (17), a magnet (17) connected to the middle of the bolt (13), and the top of the adjusting rod (8) is made of magnetic material. The magnet (17) and the adjusting rod (8) are magnetically connected.

6. The multi-mode quick-change chuck impact drill according to claim 1, characterized in that: It also includes a tension spring (18), and a tension spring (18) is fitted on the guide rod (6) inside the square chuck (3). The two ends of the tension spring (18) are connected to two extrusion plates (5) respectively, and the extrusion plates (5) inside the square chuck (3) are threadedly connected to the two ends of the bidirectional screw (7).

7. A multi-mode quick-change chuck impact drill according to claim 3, characterized in that: It also includes a cover plate (19), and the ports of the square clamp (3) and the triangular clamp (4) are all connected to the cover plate (19). The cover plate (19) blocks the gap between the extrusion plate (5) and the contact plate (14).

8. A multi-mode quick-change chuck impact drill according to claim 2, characterized in that: It also includes a buffer pad (20), and the top plate (11) is connected to the side facing the port with the buffer pad (20).

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