Self-driven dust-sucking percussion drill

Abstract

The application provides a percussion drill capable of self-driving dust collection, comprising a percussion drill body, a drill bit, a dust collection bin and a driving assembly. The percussion drill body is provided with an airflow channel. The drill bit is connected with the percussion drill body, the percussion drill body is used for driving the drill bit to work, the drill bit is provided with a plurality of air extraction holes, and the plurality of air extraction holes are communicated with the airflow channel. The dust collection bin is detachably connected with the percussion drill body, the dust collection bin is communicated with the airflow channel, the driving assembly is arranged in the percussion drill body, the driving assembly is coaxially arranged with the drill bit, and the driving assembly is used for providing suction force so that the airflow sequentially passes through the air extraction hole, the airflow channel and the dust collection bin. By adopting the above structure, the self kinetic energy of the percussion drill is utilized to realize "drilling and suction simultaneously", the dust collection efficiency is high, and the working environment is clean.

Description

Technical Field

[0001] This application relates to the field of power tool technology, and in particular to a self-driving dust-collecting impact drill. Background Technology

[0002] In existing technologies, drilling operations using rotary cutting tools such as impact drills on hard materials like concrete and masonry generate a large amount of fine dust. This dust primarily causes the following problems: First, the dust permeating the operating area severely obstructs the operator's vision, creating a harsh working environment and directly affecting the accurate judgment of drilling positioning, verticality, and depth, making it difficult to guarantee drilling accuracy. Second, a large amount of dust easily adheres to and accumulates in the drill bit's spiral chip removal grooves during drilling, quickly causing blockage of the chip removal channel, significantly reducing chip removal efficiency, thereby accelerating drill bit wear, increasing load, and affecting drilling speed.

[0003] To address these issues, some external dust collection or suction devices have emerged on the market. However, these existing solutions typically have significant drawbacks: First, the devices are often complex in structure, requiring additional accessories, piping, or power sources, making installation and disassembly inconvenient and affecting the portability and operational flexibility of the tools themselves. Second, there is usually insufficient sealing between the drill bit and the dust collection device, or between the dust collection device and the working face, making it difficult to form an effective negative pressure enclosure at the drilling point, leading to dust dispersion and low collection efficiency. Third, most devices can only collect a portion of the dust that is raised, and it is difficult to completely collect dust generated near the borehole opening that falls directly or embeds itself in the borehole wall, resulting in serious dust leakage.

[0004] Therefore, existing external dust collection solutions generally suffer from drawbacks such as inconvenience in use, poor sealing performance, and incomplete dust collection, and there is an urgent need for a more efficient, integrated, and reliable solution. Summary of the Invention

[0005] Therefore, it is necessary to provide a self-driving dust-collecting impact drill to address the aforementioned technical problems.

[0006] A self-propelled dust-collecting impact drill, comprising: The impact drill body is equipped with an airflow channel; A drill bit is connected to the impact drill body, which drives the drill bit to work. The drill bit has multiple air extraction holes, all of which are connected to the airflow channel. A dust collection chamber, detachably connected to the impact drill body, and communicating with the airflow channel; and A drive assembly is disposed within the body of the impact drill. The drive assembly is coaxially arranged with the drill bit. The drive assembly is used to provide suction so that the airflow passes sequentially through the air extraction hole, the airflow channel, and the dust collection chamber.

[0007] In one embodiment, the driving component includes: The actuator is disposed within the body of the impact drill; and An impeller is disposed between the driver and the drill bit, and the impeller is connected to the output end of the driver.

[0008] In one embodiment, the driving component further includes: The impeller is connected to the output end of the driver via the drive shaft, and the drive shaft is coaxially arranged with the drill bit.

[0009] In one embodiment, the actuator is fixed to the body of the impact drill by screws.

[0010] In one embodiment, the blade angle of the impeller is in the range of 50°-55°.

[0011] In one embodiment, the dust collection bin includes: The dust collection chamber body is detachably connected to the impact drill body via a sealing ring.

[0012] In one embodiment, the sealing ring and the dust collection chamber body are an integral structure.

[0013] In one embodiment, the dust collection chamber body is made of a transparent material.

[0014] In one embodiment, the drill bit includes: The drill bit body has multiple air extraction holes evenly distributed along the axial direction of the drill bit body. The drill bit body has an airflow channel, and the multiple air extraction holes are connected to the airflow channel through the airflow channel.

[0015] In one embodiment, the drill bit body has a mounting groove at one end near the dust collection chamber, and the drill bit body is fixedly connected to the impact drill body through the mounting groove.

[0016] Compared with existing technologies, the aforementioned self-driving dust-collecting impact drill includes: an impact drill body, a drill bit, a dust collection chamber, and a drive assembly. The impact drill body is provided with an airflow channel. The drill bit is connected to the impact drill body, and the impact drill body drives the drill bit to work. The drill bit has multiple suction holes, all of which communicate with the airflow channel. The dust collection chamber is detachably connected to the impact drill body and communicates with the airflow channel. The drive assembly is disposed within the impact drill body and is coaxially arranged with the drill bit. The drive assembly provides suction so that airflow passes sequentially through the suction holes, the airflow channel, and the dust collection chamber. This application adopts the above structure, utilizing the impact drill's own kinetic energy to achieve "drilling and suction simultaneously," resulting in high dust collection efficiency and a clean working environment. Furthermore, the coaxial design of the drive assembly and drill bit does not add extra volume and does not affect the use of the original drill bit. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of a self-driving dust-collecting impact drill provided in an embodiment of this application; Figure 2 A schematic diagram of the internal structure of a self-driving dust-collecting impact drill provided in an embodiment of this application; Figure 3 A schematic diagram of the airflow direction of a self-driving dust-collecting impact drill provided in an embodiment of this application; Figure 4 This is a schematic diagram of the impeller structure provided in one embodiment of this application; Figure 5 This is a schematic diagram of the structure of a dust collection bin provided in one embodiment of this application; Figure 6 This is a schematic diagram of the structure of a drill bit provided in one embodiment of this application.

[0019] Explanation of reference numerals in the attached figures: 1. Impact drill body; 101. Airflow channel; 102. Impeller; 103. Driver; 104. Drive shaft; 2. Drill bit; 201. Air extraction hole; 202. Drill bit cutting edge; 203. Drill bit airflow channel; 204. Mounting slot; 3. Dust collection bin; 301. Dust collection bin body; 302. Sealing ring. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0021] The serial numbers assigned to components in this document, such as "first" and "second," are used solely to distinguish the objects being described and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, 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 application.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] Please see Figures 1 to 6This application provides an embodiment of a self-driving impact drill. The self-driving impact drill includes: an impact drill body 1, a drill bit 2, a dust collection chamber 3, and a drive assembly. The impact drill body 1 is provided with an airflow channel 101. The drill bit 2 is connected to the impact drill body 1, and the impact drill body 1 drives the drill bit 2 to work. The drill bit 2 has multiple suction holes 201, all of which communicate with the airflow channel 101. The dust collection chamber 3 is detachably connected to the impact drill body 1 and communicates with the airflow channel 101. The drive assembly is disposed within the impact drill body 1 and is coaxially arranged with the drill bit 2. The drive assembly provides suction so that airflow passes sequentially through the suction holes 201, the airflow channel 101, and the dust collection chamber 3.

[0026] In some embodiments, the impact drill body 1 constitutes the main support structure of the device, and an airflow channel 101 is arranged axially inside it. This airflow channel 101 serves as the core transmission path for the negative pressure airflow and dust mixture. In some embodiments, the drill bit 2 is detachably connected to the front drive output portion of the impact drill body 1, for example, by means of snap-fit, threads, or quick-change interfaces. In some embodiments, the impact drill body 1 is provided with a conventional impact and rotation drive mechanism for driving the drill bit 2 to perform rotational and impact movements to execute drilling operations. In some embodiments, the drill bit 2 has multiple suction holes 201. These suction holes 201 are preferably distributed circumferentially or axially along the working part of the drill bit 2 (i.e., the chip groove area or behind the drill bit cutting edge 202), and all suction holes 201 are in communication with the airflow channel 101. This allows dust generated at the bottom of the hole during drilling to be directly sucked out from the source.

[0027] In some embodiments, the dust collection chamber 3 is detachably connected to the impact drill body 1, and its internal cavity communicates with the airflow channel 101. The dust collection chamber 3 is used to collect and store dust particles carried in the sucked-in airflow. In some embodiments, the drive assembly is disposed inside the impact drill body 1, located in the airflow path between the drill bit 2 and the dust collection chamber 3. In some embodiments, the drive assembly is coaxially arranged with the drill bit 2. This drive assembly is used to provide suction within the system. When it is working, a negative pressure is generated at the air extraction port 201 of the drill bit 2, forming an airflow flowing from the drill bit tip towards the dust collection chamber 3. Thus, the dust generated during drilling passes sequentially through the air extraction port 201, the internal channel of the drill bit, and the airflow channel 101, and is finally collected in the dust collection chamber 3, achieving the effect of "drilling while suctioning". Since the suction source is built into the impact drill body and coaxial with the drill bit, the shortest airflow path and the highest efficiency are ensured, and no complex external piping is required.

[0028] In some embodiments, the drive assembly includes a driver 103 and an impeller 102. The driver 103 is disposed within the impact drill body 1. The impeller 102 is disposed between the driver 103 and the drill bit 2, and the impeller 102 is connected to the output end of the driver 103.

[0029] In some embodiments, the drive assembly is designed to directly utilize the rotary power source of the impact drill itself, achieving high integration and self-drive. Specifically, the drive assembly includes an impeller 102 and a power transmission sleeve. A power transmission sleeve is provided at the end of the motor rotor shaft (i.e., the main shaft driving the drill bit) inherent in the impact drill body 1. This sleeve is fixedly fitted to the end of the rotor shaft by an interference fit, ensuring synchronous rotation with the rotor shaft. The impeller 102, as the core component for generating negative pressure, has its hub fixedly mounted on the power transmission sleeve by an interference fit or key connection. Therefore, when the impact drill motor starts and the rotor shaft rotates to drive the drill bit 2, it synchronously drives the impeller 102 to rotate at high speed. When the impeller 102 rotates, centrifugal force is generated in the chamber on its air intake side (near the drill bit 2), thereby forming a stable internal negative pressure. This design eliminates the need for an additional independent drive (such as a separate vacuum motor), resulting in an extremely compact structure, direct and efficient power transmission, and natural synchronous start and stop of the vacuuming function and drilling operation.

[0030] To ensure smoother power transmission and further optimize airflow, the impeller 102 should be installed in a position that ensures its axis of rotation is coaxial with that of the drill bit 2. This coaxial arrangement maximizes the smoothness and straightness of the airflow path from the drill bit's suction port to the impeller's air inlet, reducing turbulence and pressure loss caused by airflow deflection, thereby significantly improving dust collection efficiency.

[0031] In some embodiments, the impeller 102 can be designed as a standalone fan blade used only for dust collection, or it can be integrated with the cooling fan inside the impact drill to achieve multiple uses and simplify the structure.

[0032] In some embodiments, to ensure that the impeller efficiently generates the required negative pressure within a limited space, its external dimensions need to be precisely calculated. Specifically, it is assumed that the impeller inlet is a high-pressure zone ( The outlet is a low-pressure area. ≈0), the inlet velocity is negligible ( If ≈0), then the formula for the outlet velocity is: , where ρ is the air density (approximately 1.2 kg / m³). In some embodiments, the impeller outlet area The dust collection flow rate Q and the outlet flow rate can be used as indicators. The calculation is as follows: .

[0033] In some embodiments, by export area The outer diameter of the impeller can be deduced from this. and blade width The formula is This allows the determination of the impeller's external dimensions. In some embodiments, the blade tilt angle β determines the airflow direction and efficiency. This is based on the pump cut law: Combining the design flow rate Q and impeller outer diameter The blade tilt angle β can be determined.

[0034] In some embodiments, using the above method, taking a dust collection capacity of 25 ml and a rotation speed of 25000 r / min as an example, the key dimensions of the impeller and the suction channel are calculated and designed to ensure sufficient suction power is generated within a limited space. Specific values ​​are shown in the table below.

[0035] In some embodiments, the drive assembly may further include a drive shaft 104. The impeller 102 is connected to the output end of the driver 103 via the drive shaft 104. Power transmission can be achieved via a coupling or direct sleeve connection. Preferably, the driver 103 (such as a motor) is securely mounted on a pre-set mounting base inside the impact drill body 1 using screws or other fasteners to ensure stability during operation. Simultaneously, the drive shaft 104 is coaxially arranged with the rotation axis of the drill bit 2. This coaxial layout maximizes the smoothness of the airflow channel, reduces turbulence and pressure loss, and improves dust collection efficiency.

[0036] In some embodiments, the impeller 102 is specially designed to achieve the optimal balance between suction performance and power consumption within a limited internal space. In some embodiments, the blade angle of the impeller 102 is optimized to be within the range of 50°-55°. This angle range has been experimentally verified to generate a sufficiently large negative pressure under conditions of small volume and high speed to overcome the flow resistance of dust in the narrow suction holes and long channels of the drill bit, while avoiding excessive motor load or efficiency reduction due to an excessively large angle.

[0037] In some embodiments, the dust collection bin 3 includes a dust collection bin body 301. The dust collection bin body 301 is detachably connected to the impact drill body 1 via a sealing ring 302. In some embodiments, the sealing ring 302 and the dust collection bin body 301 are integrally formed. In some embodiments, the dust collection bin body 301 is made of a transparent material.

[0038] In some embodiments, the specific structure of the dust collection chamber 3 is further refined regarding dust collection and device maintenance. Specifically, the dust collection chamber body 301 is detachably connected to the docking interface on the impact drill body 1 via a sealing ring 302. This connection method (such as a screw-on snap-fit) facilitates regular cleaning of accumulated dust by the user. The sealing ring 302 ensures the airtightness of the connection between the dust collection chamber 3 and the impact drill body 1, preventing leakage of dust-laden airflow and ensuring that all inhaled dust is guided into the chamber. To improve sealing reliability and production convenience, the sealing ring 302 can be integrated with the dust collection chamber body 301 through secondary injection molding or one-piece molding processes. Furthermore, to facilitate users' intuitive observation of dust accumulation and timely cleaning, the dust collection chamber body 301 is preferably made of transparent or translucent engineering plastics (such as PC, PMMA, etc.). In some embodiments, the sealing ring 302 can be made of soft silicone.

[0039] In some embodiments, the drill bit 2 includes: a drill bit body, a plurality of air extraction holes 201 evenly distributed along the axial direction of the drill bit body, and a drill bit airflow channel 203 formed in the drill bit body, wherein the plurality of air extraction holes 201 communicate with the airflow channel 101 through the drill bit airflow channel 203. In some embodiments, a mounting groove 204 is formed at one end of the drill bit body near the dust collection chamber 3, and the drill bit body is fixedly connected to the impact drill body 1 through the mounting groove 204.

[0040] In some embodiments, the drill bit 2 includes a drill bit body. A plurality of extraction holes 201 are evenly distributed along the axial direction of the drill bit body, at the root of the chip removal groove or between the cutting edges of adjacent drill bits, to ensure that during drilling, regardless of the angle to which the drill bit rotates, there are extraction holes that can effectively cover the dust-generating area. The drill bit body also has an internally machined drill bit airflow channel 203, which serves as a confluence channel to collect the dust-laden airflow drawn in by the extraction holes 201. The plurality of extraction holes 201 communicate with the airflow channel 101 of the impact drill body 1 through the drill bit airflow channel 203, forming a complete and sealed suction path.

[0041] In some embodiments, to achieve a secure and easy-to-assemble / disassemble connection between the drill bit 2 and the impact drill body 1, a mounting groove 204 is provided at one end of the drill bit body near the dust collection chamber 3 (i.e., the shank). This mounting groove 204 can be an internal hexagonal socket, a flange, or a bayonet of a specific shape. The drill bit body is fixedly connected to the output shaft or chuck at the front end of the impact drill body 1 via the mounting groove 204 using a matching structure (such as steel balls or keyways). This connection method, while transmitting enormous impact force and torque, also ensures precise alignment and sealed communication between the drill bit airflow channel 203 and the impact drill body airflow channel 101.

[0042] In summary, this application, through an innovative coaxial power transmission design, deeply integrates the dust collection function into the impact drill body, constructing a self-driven, highly efficient, and controllable source dust collection system. This design is extremely compact, requires no external devices, and is easy to use. It fundamentally solves the problems of dust pollution, obstructed vision, and clogging of the drill bit's chip removal grooves when drilling hard materials, significantly improving operational accuracy, tool life, and user experience.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A self-propelled dust-collecting impact drill, characterized in that, include: The impact drill body is equipped with an airflow channel; A drill bit is connected to the impact drill body, which drives the drill bit to work. The drill bit has multiple air extraction holes, all of which are connected to the airflow channel. A dust collection chamber, detachably connected to the impact drill body, and communicating with the airflow channel; and A drive assembly is disposed within the body of the impact drill. The drive assembly is coaxially arranged with the drill bit. The drive assembly is used to provide suction so that the airflow passes sequentially through the air extraction hole, the airflow channel, and the dust collection chamber.

2. The self-driving dust-collecting impact drill as described in claim 1, characterized in that, The driving component includes: The actuator is disposed within the body of the impact drill; and An impeller is disposed between the driver and the drill bit, and the impeller is connected to the output end of the driver.

3. The self-driving dust-collecting impact drill as described in claim 2, characterized in that, The driving component also includes: The impeller is connected to the output end of the driver via the drive shaft, and the drive shaft is coaxially arranged with the drill bit.

4. The self-driving dust-collecting impact drill as described in claim 2, characterized in that, The actuator is fixed to the body of the impact drill by screws.

5. The self-driving dust-collecting impact drill as described in claim 2, characterized in that, The blade angle of the impeller is in the range of 50°-55°.

6. The self-driving dust-collecting impact drill as described in claim 1, characterized in that, The dust collection bin includes: The dust collection chamber body is detachably connected to the impact drill body via a sealing ring.

7. The self-driving dust-collecting impact drill as described in claim 6, characterized in that, The sealing ring and the dust collection chamber body are an integral structure.

8. The self-driving dust-collecting impact drill as described in claim 7, characterized in that, The dust collection chamber body is made of transparent material.

9. The self-driving dust-collecting impact drill as described in claim 1, characterized in that, The drill bit includes: The drill bit body has multiple air extraction holes evenly distributed along the axial direction of the drill bit body. The drill bit body has an airflow channel, and the multiple air extraction holes are connected to the airflow channel through the airflow channel.

10. The self-driving dust-collecting impact drill as described in claim 9, characterized in that, The drill bit body has an installation groove at one end near the dust collection chamber, and the drill bit body is fixedly connected to the impact drill body through the installation groove.

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