Electric fastening tool

Abstract

The application discloses an electric fastening tool, which comprises a shell, a motor installed in the shell, the motor comprising a motor shaft, a transmission assembly supported by the shell and connected to the motor, and an impact assembly connected to the transmission assembly, the impact assembly comprising a main shaft, an output shaft, and a hammer configured to reciprocate along the main shaft to apply an impact to the output shaft in response to rotation of the main shaft. At least one air inlet or outlet is formed on the shell, and a dustproof piece is arranged on the at least one air inlet or outlet. The application can eliminate the risk of motor short circuit and prolong the service life of the electric fastening tool.

Description

Technical Field

[0001] This application relates to a power tool, specifically a power fastening tool. Background Technology

[0002] Handheld power tools play a vital role in daily production and life. These include, but are not limited to, electric drills, impact drills, impact wrenches, impact screwdrivers, and angle grinders. Electric drills and impact drills can be fitted with drill bits of different diameters to drill holes in objects; impact wrenches are used to tighten bolts and nuts; impact screwdrivers are typically used to loosen or tighten screws; and angle grinders can be used for grinding and cutting. Using handheld power tools can improve work efficiency and reduce labor intensity.

[0003] To cool the motor in power tools, air inlets or outlets are usually installed on the tool's housing. Since power tools operate in environments with high levels of dust, external dust can enter the housing through these inlets, posing a risk of short-circuiting the motor or accelerating wear on the internal transmission structure, thus shortening the tool's lifespan.

[0004] This section provides background information related to this application, which is not necessarily prior art. Utility Model Content

[0005] One objective of this application is to solve or at least mitigate some or all of the aforementioned problems, thereby eliminating the risk of motor short circuits and extending the service life of electric fastening tools.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An electric fastening tool includes: a housing; a motor mounted within the housing, the motor including a motor shaft; a transmission assembly supported by the housing and connected to the motor; an impact assembly connected to the transmission assembly, the impact assembly including a spindle, an output shaft, and a hammer configured to reciprocate along the spindle to apply an impact to the output shaft in response to rotation of the spindle; at least one air inlet or outlet is formed on the housing, and a dustproof element is provided on the at least one air inlet.

[0008] In some embodiments, the dustproof component is located on the outside of the housing.

[0009] In some embodiments, a dustproof component is disposed around the outside of the housing to cover all the air vents.

[0010] In some embodiments, the dustproof component is separately installed at the air vent.

[0011] In some embodiments, a mounting element is also included for mounting a dustproof component.

[0012] In some embodiments, the mounting element is formed on the housing, or the mounting element is a separate soft rubber sleeve.

[0013] In some embodiments, the dustproof component is elastic, or the dustproof component is detachably mounted on the outside of the housing.

[0014] In some embodiments, the electric fastening tool includes one of an electric screwdriver, an electric wrench, or an electric drill.

[0015] An electric fastening tool includes: a housing; a motor installed inside the housing, the motor including a motor shaft; a transmission assembly supported by the housing and connected to the motor; an impact assembly connected to the transmission assembly for outputting power to fasten a workpiece; and at least one air inlet or outlet formed on the housing, the at least one air inlet being provided with a dustproof component.

[0016] In some embodiments, the dustproof component is detachably disposed on the outside of the housing.

[0017] The advantages of this application are:

[0018] The electric fastening tool provided in this application has a motor and a transmission assembly connected to the motor housed in the housing. An impact assembly is connected to the transmission assembly to achieve power output. At least one air inlet on the housing for air inlet or outlet is equipped with a dustproof component. By providing the dustproof component, the air entering the housing can be filtered, effectively preventing dust and other impurities from being sucked in or falling into the housing through the air outlet, eliminating the risk of motor short circuits, and avoiding accelerated wear of the transmission and impact assemblies, thus extending the service life of the electric fastening tool. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of one embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the installation of a dustproof component according to an embodiment of this application;

[0021] Figure 3 This is a front view of one embodiment of this application;

[0022] Figure 4 yes Figure 3 View from AA direction;

[0023] Figure 5 yes Figure 4 A magnified view of a section at point A in the middle;

[0024] Figure 6 yes Figure 3 Sectional view along line AA;

[0025] Figure 7This is an exploded view of the transmission assembly in this application;

[0026] Figure 8 This is an exploded view of the motor and transmission components in this application;

[0027] Figure 9 This is a schematic diagram of the planetary gear set in this application;

[0028] Figure 10 This is a schematic diagram of the header of one embodiment of this application;

[0029] Figure 11 This is an installation diagram of a ring lighting assembly in one embodiment of this application;

[0030] Figure 12 This is a schematic diagram of a limiting retaining ring in one embodiment of this application;

[0031] Figure 13 This is a schematic diagram of a locking component in one embodiment of this application;

[0032] Figure 14 This is the main view of the locking component in one embodiment of this application;

[0033] Figure 15 yes Figure 14 Sectional view along the BB direction;

[0034] Figure 16 This is a schematic diagram of the hammer shell in one embodiment of this application.

[0035] In the picture:

[0036] 100. Impact tool; 1. Housing; 11. Gearbox rear cover; 12. Air vent; 13. Mounting component; 14. Hammer housing; 141. Bushing; 141a. First protrusion; 142a. Second protrusion; 2. Motor; 21. Motor shaft; 211. First axis; 22. Bearing; 3. Output assembly; 31. Output shaft; 311. Output axis; 4. Impact assembly; 41. Spindle; 411. Support component; 412. Spindle axis; 4 2. Hammer; 5. Transmission assembly; 51. Gear shaft; 52. Planetary gear set; 521. Planetary carrier; 522. Pin; 523. Planetary gear; 53. Internal gear ring; 6. Circular lighting assembly; 61. C-shaped light panel; 62. Lampshade; 63. Decorative cover; 64. Limiting ring; 7. Locking assembly; 71. Unlocking component; 72. Sleeve; 73. Locking component; 74. Return spring; 75. Pop-out spring; 8. Metal washer; 9. Dustproof component. Detailed Implementation

[0037] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0038] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0039] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0040] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0041] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0042] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0043] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0044] Handheld power tools play a vital role in daily life and production. These tools include, but are not limited to, electric drills, impact drills, impact wrenches, impact screwdrivers, angle grinders, nail guns, and fastener actuators. Electric drills and impact drills can be configured with different diameter drill bits to drill holes in objects; impact wrenches are used to tighten bolts and nuts; impact screwdrivers are typically used to loosen or tighten screws; and angle grinders can be used for grinding and cutting. Using handheld power tools can improve work efficiency and reduce labor intensity.

[0045] In this embodiment, the impact tool, as a handheld power tool, is powered by a rechargeable battery pack. In some embodiments, the battery pack is a battery module, which, in conjunction with a corresponding power circuit, supplies power to the impact tool. Those skilled in the art will understand that in other embodiments, the impact tool can also be powered by other power sources. For example, the power supply can be an AC power line connected to mains electricity, or it can be other connecting cables that can be connected to a power supply device. Mains electricity or other power supply devices, in conjunction with corresponding rectification, filtering, and voltage regulation circuits, provide power to the relevant components of the impact tool.

[0046] When using impact tools, in order to meet the requirements of working in confined spaces and ensure flexibility of use, such as... Figures 1-15 As shown, this application provides an impact tool 100. The impact tool 100 includes a motor 2, an output component 3, an impact component 4, a transmission component 5, and a support member 411.

[0047] The motor 2 includes a motor shaft 21 that rotates about a first axis 211. The output assembly 3 includes an output shaft 31 that rotates about an output axis 311 and is used to output power. The impact assembly 4 provides impact force to the output shaft 31 and includes a main shaft 41 driven by the motor shaft 21 to rotate about a main shaft axis 412. The transmission assembly 5 transmits the rotational motion of the motor shaft 21 to the main shaft 41 and includes a gear shaft 51 and a planetary gear set 52. The gear shaft 51 is formed on or connected to the motor shaft 21, and a support member 411 is provided between the gear shaft 51 and the main shaft 41. The support member 411 is rotatable relative to the gear shaft 51 or the main shaft 41, and in the direction of the first axis 211, the support member 411 is located behind the planetary gear set 52.

[0048] By setting a support member 411 to support the main shaft 41, the original main shaft bearing supporting the main shaft 41 is eliminated, which shortens the length of the head of the impact tool 100 along the first axis 211, thereby enabling operation in confined spaces and ensuring flexibility of use.

[0049] like Figures 4-6 As shown, in some embodiments, the support member 411 is a bushing. During installation, the bushing can be directly fixedly fitted onto the gear shaft 51 or fixedly embedded into the main shaft 41. While effectively supporting the main shaft 41 with the bushing, the main shaft bearing can be eliminated, thereby shortening the overall head size of the machine. Moreover, the bushing is relatively lightweight, which can simultaneously reduce the weight of the impact tool 100, making it easier to use and reducing the user's labor intensity.

[0050] In some embodiments, the support member 411 and the gear shaft 51 are integrally formed. By integrating the support member 411 and the gear shaft 51, manufacturing is simplified, eliminating the need for the support member 411 installation process. This ensures a stable connection between the support member 411 and the gear shaft 51, preventing relative rotation between them and thus avoiding wear. Furthermore, it effectively supports the main shaft 41, ensuring smooth rotation of the main shaft 41. In other embodiments, the support member 411 and the gear shaft 51 can be designed as separate structures. This allows for easy replacement of the bushing when it wears out, without needing to replace the gear shaft 51, thus ensuring cost-effectiveness.

[0051] like Figure 5 As shown, in some embodiments, the thickness D of the support member 411 is less than or equal to 4 mm. The thickness D of the support member 411 can be 3.9 mm, 3.8 mm, 3.7 mm, 3.6 mm, 3.5 mm, 3.4 mm, 3.3 mm, etc. By limiting the thickness of the support member 411, while ensuring effective support for the spindle 41, the thickness and weight of the support member 411 are minimized, thereby reducing the space occupied by the support member 411 and achieving a lightweight design for the impact tool 100.

[0052] like Figure 5 As shown, in some embodiments, the width W of the support member 411 is less than or equal to 8 mm. Optionally, the width W of the support member 411 can be 7.9 mm, 7.8 mm, 7.7 mm, 7.6 mm, 7.5 mm, 7.4 mm, 7.3 mm, etc. By limiting the width of the support member 411, the support member 411 avoids occupying a large space along the first axis 211, thereby effectively shortening the head size of the impact tool 100 and flexibly meeting the needs of use in confined spaces.

[0053] In some embodiments, the impact tool further includes a housing 1, and the spindle 41 does not directly contact the housing 1. This arrangement ensures that no relative friction occurs between the spindle 41 and the housing 1 during rotation, thereby protecting both the spindle 41 and the housing 1.

[0054] like Figure 6 As shown, in some embodiments, the housing 1 includes a gearbox rear cover 11, with a metal washer 8 disposed between the gearbox rear cover 11 and the main shaft 41, allowing for sliding friction between the main shaft 41 and the metal washer 8. The gearbox rear cover 11 is fixedly connected to the housing, and the metal washer 8 prevents direct contact between the main shaft 41 and the gearbox rear cover 11. During the rotation of the main shaft 41, it will slide against the metal washer 8, thereby preventing wear and heat generation on the gearbox rear cover 11. When the metal washer 8 is worn to a certain extent and cannot be used, it only needs to be replaced with a new metal washer 8. By using the metal washer 8 to protect the gearbox rear cover 11, economic efficiency can be ensured.

[0055] like Figure 4 , Figures 7-8 As shown, in some embodiments, the impact tool 100 further includes a bearing 22, which does not overlap with the main shaft 41 in the extending direction of the output shaft 31. The outer ring of the bearing 22 is fixedly mounted on the gearbox rear cover 11, and the inner ring of the bearing 22 is fixedly sleeved on the motor shaft 21. The bearing 22 is used to support the motor shaft 21, thereby ensuring the stable rotation of the motor shaft 21. Moreover, since the bearing 22 is only used to support the motor shaft 21, there is no need to provide space on the main shaft 41 to arrange the bearing 22, thereby ensuring the structural strength of the main shaft 41.

[0056] In some embodiments, the line of action of the radial load applied by the gear shaft 51 to the main shaft 41 does not pass through the planetary gear 523. With this arrangement, the main shaft 41 is coaxial with the gear shaft 51 via the planetary gear 523, but the planetary gear 523 does not provide self-support for the main shaft 41. This ensures the smooth rotation of the main shaft 41 driven by the gear shaft 51 through the planetary gear set 52, avoids abnormal wear of the planetary gear set 52 due to radial force, and extends the service life of the planetary gear set 52.

[0057] like Figure 1 As shown, in some embodiments, the total length L of the impact tool 100 is less than or equal to 200 mm. Optionally, the total length L of the impact tool 100 can be 195 mm, 190 mm, 185 mm, 180 mm, 175 mm, 170 mm, 165 mm, 160 mm, etc. By limiting the total length of the impact tool 100, it is possible to make the impact tool 100 more compact, achieve miniaturization, and facilitate its use in confined spaces.

[0058] In some embodiments, the support member 411 is fixedly mounted on the spindle 41. By fixing the support member 411 to the spindle 41, the support member 411 rotates synchronously while the spindle 41 rotates, avoiding relative rotation between the support member 411 and the spindle 41, thereby preventing the support member 411 from being worn out quickly.

[0059] In some embodiments, the support member 411 is integrally formed with the spindle 41. By integrating the support member 411 with the spindle 41, the installation process can be saved, while ensuring the strength of the connection between the support member 411 and the spindle 41.

[0060] like Figures 6-9 As shown, in some embodiments, an internal gear ring 53 is fixedly disposed inside the housing 1. The planetary gear set 52 includes a pin 522, planetary gears 523, and a planet carrier 521. The pin 522 is disposed on the planet carrier 521 in a direction parallel to the first axis 211. The planetary gears 523 are rotatably sleeved on the pin 522, and the planetary gears 523 mesh with the gear shaft 51 and the internal gear ring 53. The planet carrier 521 is coaxially connected to the main shaft 41. During the rotation of the motor shaft 21, the motor shaft 21 drives the gear shaft 51 to rotate. The sun gear of the gear shaft 51 drives the planet carrier 521 to rotate synchronously through the planetary gears 523. The planet carrier 521 drives the main shaft 41 to rotate, thereby realizing the rotation of the main shaft 41. To ensure stable transmission, multiple planetary gears 523 are equally spaced along the circumference of the planet carrier 521.

[0061] Using planetary gear transmission has the following advantages:

[0062] 1. High space utilization: Multiple planetary gears 523 (usually 3-4) rotate around the sun gear of the gear shaft 51, resulting in uniform power distribution and a compact structure, making it suitable for space-constrained scenarios and effectively meeting the needs of small spaces.

[0063] 2. Symmetrical force design: This design balances the load between planetary gears 523, reducing uneven wear and achieving a transmission efficiency of 95%-98%. Low inertia loss: The rotating parts have a uniform mass distribution, resulting in less energy loss during startup and speed changes.

[0064] 3. Load sharing characteristics: Multiple planetary gears 523 distribute the load, reduce stress on a single tooth, and extend the service life of the planetary gears 523.

[0065] 4. Optimized meshing frequency: The phase difference of multiple planetary gears 523 meshing can offset some vibrations, resulting in lower noise.

[0066] like Figures 7-8 As shown, in some embodiments, the planetary carrier 521 is integrated on the spindle 41. By designing the planetary carrier 521 and the spindle 41 as an integrated structure, the connection process between the planetary carrier 521 and the spindle 41 is eliminated, while ensuring the coaxiality of the planetary carrier 521 and the spindle 41. It also enables a compact design of the spindle 41, ensuring a shorter overall length of the impact tool 100.

[0067] In some embodiments, the impact tool 100 is an impact screwdriver or an impact wrench. Impact screwdrivers and impact wrenches are two types of power tools specifically designed for high-torque operations, widely used in mechanical assembly, automotive repair, construction, and other fields. Impact screwdrivers generate axial impact force through an internal impact component 4, instantly releasing high torque (typically 50Nm-200Nm), suitable for tightening / unraveling long screws or stubborn bolts. Moreover, the impact frequency can reach thousands of times per minute, avoiding excessive force on the user's hands. Impact screwdrivers are smaller than ordinary electric drills, suitable for use in confined spaces. Impact wrenches have a wide torque range, meeting the needs of bolt or nut tightening.

[0068] like Figures 1-15 As shown, this application also provides an impact tool 100, which includes a motor 2, an output component 3, a transmission component 5, and an impact component 4.

[0069] The motor 2 includes a motor shaft 21 that rotates about a first axis 211. The output assembly 3 includes an output shaft 31 that rotates about an output axis 311 and is used to output power. The impact assembly 4 is used to provide impact force to the output shaft 31. The impact assembly 4 includes a main shaft 41, which is driven by the motor shaft 21 to rotate about the main shaft axis 412. The transmission assembly 5 is used to transmit the rotational motion of the motor shaft 21 to the main shaft 41. The transmission assembly 5 includes a gear shaft 51 and a planetary gear set 52. The gear shaft 51 is formed on or connected to the motor shaft 21, and the line of action of the radial load applied by the gear shaft 51 to the main shaft 41 does not pass through the planetary gears 523.

[0070] Since the main shaft 41 is coaxial with the gear shaft 51 through the planetary gears 523, but the planetary gears 523 do not provide self-support for the main shaft 41, the smoothness of the main shaft 41 being driven to rotate by the gear shaft 51 through the planetary gear set 52 is ensured, and abnormal wear of the planetary gear set 52 due to radial force is avoided, thus extending the service life of the planetary gear set 52.

[0071] In order to eliminate the risk of motor short circuits and extend the service life of electric fastening tools, such as Figures 1-15 As shown, this application provides an electric fastening tool. The electric fastening tool includes a housing 1, a motor 2, a transmission assembly 5, an impact assembly 4, and a dustproof component 9.

[0072] The motor 2 is installed inside the housing 1 and includes a motor shaft 21. The transmission assembly 5 is supported by the housing 1 and connected to the motor 2. The impact assembly 4 is connected to the transmission assembly 5 and includes a main shaft 41, an output shaft 31, and a hammer 42 configured to reciprocate along the main shaft 41 to apply an impact to the output shaft 31 in response to the rotation of the main shaft 41. At least one air inlet 12 is formed on the housing 1 for air inlet or outlet, and a dustproof element 9 is provided on the at least one air inlet 12.

[0073] By setting up the dustproof component 9, the gas entering the housing 1 can be filtered, thereby effectively preventing dust and other impurities from being sucked in or falling into the housing 1 through the air outlet 12, eliminating the risk of short circuit of the motor 2, and avoiding accelerated wear of the transmission component 5 and the impact component 4, thus extending the service life of the electric fastening tool.

[0074] like Figure 2 As shown, in some embodiments, the dustproof component 9 is located on the outside of the housing 1. This arrangement allows for easy installation of the dustproof component 9 directly onto the housing 1 at the location corresponding to the air vent 12. Furthermore, it facilitates quick replacement should the dustproof component 9 become damaged.

[0075] like Figure 2 As shown, in some embodiments, the dustproof component 9 is arranged around the outside of the housing 1 to cover all the air vents 12. By installing the dustproof component 9 around the outside of the housing 1, all the air vents 12 can be covered at once, thereby effectively preventing dust from entering the inside of the housing 1 through the air vents 12, and facilitating the installation, removal and replacement of the dustproof component 9.

[0076] In some embodiments, the dustproof component 9 is individually installed at the air vent 12. By employing this method, a separate dustproof component 9 is arranged at each air vent 12, ensuring dust prevention while ensuring targeted placement of the dustproof component 9 and avoiding waste. Furthermore, if any dustproof component 9 is damaged, only the corresponding component needs to be replaced, further improving economic efficiency.

[0077] like Figure 2As shown, in some embodiments, the electric fastening tool further includes a mounting member 13 for mounting a dustproof component 9. By providing the mounting member 13, it is easy to install the dustproof component 9 on the outside of the housing 1 of the electric fastening tool, and it is also convenient to select the dustproof component 9 according to the adaptability of different working environments, thus flexibly meeting the needs of different working environments. Furthermore, by providing the mounting member 13, it can also serve as heat insulation and impact protection, thereby protecting the electric fastening tool from damage caused by impacts.

[0078] like Figure 2 As shown, in some embodiments, the mounting component 13 is formed on the housing 1, or the mounting component 13 is an independent soft rubber sleeve. By molding the mounting component 13 onto the housing 1, subsequent separate installation on the housing 1 is avoided, saving assembly steps, improving production efficiency, and ensuring a stable connection between the mounting component 13 and the housing 1. By embedding the dustproof component 9 into the mounting component 13 through injection molding or vulcanization, the dustproof component 9 is simultaneously installed during assembly. While ensuring a stable connection between the protective component and the mounting component 13, it is pre-assembled in one step, ensuring assembly efficiency. When the mounting component 13 is an independent soft rubber sleeve, the dustproof component 9 and the soft rubber sleeve can be assembled into an integrated structure through vulcanization, and then the soft rubber sleeve is fitted onto the outside of the housing 1 during installation. Because the soft rubber sleeve has a certain elastic deformation capability, after the soft rubber sleeve is stretched and fitted onto the outside of the housing 1, the soft rubber sleeve is firmly fitted onto the housing 1 by its own elastic recovery force.

[0079] In some embodiments, the soft sheath is made of rubber, which has high elasticity, low thermal conductivity, electrical insulation, and abrasion resistance, effectively protecting the electric fastening tool. Furthermore, the rubber is resistant to acids and alkalis and has aging resistance, meeting the requirements for use in harsh working conditions.

[0080] In some embodiments, the dustproof component 9 is elastic, or it can be detachably installed on the outside of the housing 1. The dustproof component 9 can be a dustproof mesh with a certain degree of elasticity. During installation, the user needs to open the opening of the dustproof component 9 and then slip it onto the outside of the housing 1. Under the action of its own elastic restoring force, the dustproof component 9 is stably mounted on the housing 1. Alternatively, the dustproof component 9 can be detachably installed on the outside of the housing 1 using screws, or it can be bent and secured to the outside of the housing 1 by the user. It can also be installed using Velcro, 3M adhesive, or by inserting it into a groove on a soft rubber sleeve; no further restrictions are placed here. By adopting a detachable installation method for the dustproof component 9, it is convenient to clean and replace it.

[0081] In some embodiments, the electric fastening tool includes one of an electric screwdriver, an electric wrench, or an electric drill. The use of electric fastening tools can meet the needs of frame woodwork installation, staircase drywall metal frame installation, interior drywall partition installation, and exterior wall metal frame installation. It can also be used for woodworking drilling, drilling holes in composite materials between frame wood and the base, etc., ensuring construction speed.

[0082] like Figures 1-15 As shown, this embodiment also provides an electric fastening tool, which includes a housing 1, a motor 2, a transmission assembly 5, an impact assembly 4, and a dustproof component 9.

[0083] The motor 2 is installed inside the housing 1 and includes a motor shaft 21. The transmission assembly 5 is supported by the housing 1 and connected to the motor 2. The impact assembly 4 is connected to the transmission assembly 5 and is used to output power to fasten the workpiece. At least one air inlet 12 is formed on the housing 1 for air inlet or outlet, and a dustproof component 9 is provided on the at least one air inlet 12.

[0084] By setting up the dustproof component 9, the gas entering the housing 1 can be filtered, thereby effectively preventing dust and other impurities from being sucked in or falling into the housing 1 through the air outlet 12, eliminating the risk of short circuit of the motor 2, and avoiding accelerated wear of the transmission component 5 and the impact component 4, thus extending the service life of the electric fastening tool.

[0085] like Figure 4 , Figure 10 and Figure 11 As shown, in some embodiments, to facilitate the use of electric fastening tools in dimly lit areas and to prevent shadows during use, thereby improving work efficiency, a ring-shaped lighting assembly 6 is provided on the electric fastening tool. The ring-shaped lighting assembly 6 includes a C-shaped light plate 61, a lampshade 62, and a decorative cover 63. The decorative cover 63 is fitted onto the end of the housing 1 where the tool head (drill bit, screwdriver bit, socket, etc.) is mounted. The C-shaped light plate 61 is installed between the housing 1 and the decorative cover 63. The lampshade 62 covers the end of the C-shaped light plate 61 facing the tool head and is mounted on the decorative cover 63. When using the electric fastening tool in dimly lit areas, the C-shaped light plate 61 is turned on. The light emitted from the C-shaped light plate 61 is diffused by the lampshade 62 to illuminate the work area, thus facilitating user observation and operation.

[0086] like Figure 11 and Figure 12 As shown, in some embodiments, the ring lighting assembly 6 further includes a limiting ring 64. An annular groove is provided at the end of the housing 1 where the tool head is installed. The limiting ring 64 is embedded in the annular groove and abuts against the decorative cover 63 to limit the position of the decorative cover 63 on the housing 1, ensuring that the ring lighting assembly 6 is stably installed on the housing 1 of the electric fastening tool.

[0087] like Figures 13-15 As shown, when using electric fastening tools, it is necessary to change the tool head to the corresponding type and model when dealing with different types of screws, bolts, nuts, or holes of different diameters. To facilitate quick tool head replacement, in some embodiments, a locking component 7 is installed on the output shaft 31. The locking component 7 has a locked position and an unlocked position relative to the output shaft 31. When the locking component 7 is in the locked position, it locks the tool head, ensuring a stable connection between the tool head and the output shaft 31 for operation. When the locking component 7 is unlocked and in the unlocked position, the tool head can be quickly removed for replacement.

[0088] like Figure 15 As shown, in some embodiments, the end of the output shaft 31 has a hollow cavity, and the locking assembly 7 includes an unlocking member 71, a sleeve 72, and a locking member 73. The unlocking member 71 is rotatably mounted on the housing 1, with its operating end extending relative to the housing 1. The sleeve 72 is sleeved on the output shaft 31 and is axially movable along the output shaft 31. The sleeve 72 has a locked position and an unlocked position relative to the output shaft 31. When the sleeve 72 is in the locked position, the locking member 73 abuts against the inner wall of the sleeve 72, thereby locking the tool head on the output shaft 31. When the tool head needs to be removed, the user operates the unlocking member 71, which rotates and pushes the sleeve 72 towards the tool head, thus switching from the locked position to the unlocked position. The locking member 73 separates from the sleeve 72, and the tool head can be easily pulled out. To enable automatic reset of the sleeve 72, a reset spring 74 is installed inside the sleeve 72. One end of the reset spring 74 abuts against the sleeve 72, and the other end abuts against the output shaft 31. When the sleeve 72 switches from the locked position to the unlocked position, the reset spring 74 is compressed and in a stored state. When the user releases the sleeve 72, the sleeve 72 resets under the action of the reset spring 74.

[0089] like Figure 15 As shown, in some embodiments, to enable automatic ejection of the tool head, a ejector spring 75 is installed in the hollow cavity of the output shaft 31. One end of the ejector spring 75 abuts against the bottom of the hollow cavity of the output shaft 31, and the other end abuts against the tool head. When the tool head is locked on the output shaft 31, the ejector spring 75 is in a compressed state. When the unlocking member 71 releases the sleeve 72 from locking the locking member 73, the ejector spring 75 ejects the tool head under its own elastic force. This method facilitates quick tool head replacement.

[0090] In some embodiments, see Figure 6As shown, the housing 1 includes a hammer shell 14, and a bushing 141 is arranged between the hammer shell 14 and the output shaft 31. In some embodiments, a gasket 142 is also arranged between the hammer shell 14 and the hammer 42. In some embodiments, to reduce assembly steps and improve assembly efficiency, the bushing 141, the gasket 142, and the hammer shell 14 are integrated into a single structure. The material of the housing 1 can be changed to other wear-resistant metal materials, such as powder metallurgy or cast steel. Specifically, see [link to documentation]. Figure 16 As shown, the housing 1 also includes a hammer shell 14a. The hammer shell 14a has a first protrusion 141a and a second protrusion 142a. The first protrusion 141a and the second protrusion 142a are both integrally formed on the hammer shell 14a.

[0091] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this application.

Claims

1. An electric fastening tool, comprising: Shell (1); A motor (2) is installed inside the housing (1), and the motor (2) includes a motor shaft (21); The transmission assembly (5) is supported by the housing (1) and connected to the motor (2); An impact assembly (4) is connected to the transmission assembly (5). The impact assembly (4) includes a main shaft (41), an output shaft (31), and a hammer (42) configured to reciprocate along the main shaft (41) to apply an impact to the output shaft (31) in response to the rotation of the main shaft (41). Its features are, The housing (1) has at least one air inlet (12) for air intake or air outlet, and at least one of the air inlets (12) is provided with a dustproof component (9).

2. The electric fastening tool according to claim 1, characterized in that, The dustproof component (9) is located on the outside of the housing (1).

3. The electric fastening tool according to claim 1, characterized in that, The dustproof component (9) is arranged around the outside of the housing (1) to cover all the air vents (12).

4. The electric fastening tool according to any one of claims 1-3, characterized in that, The dustproof component (9) is separately installed at the air outlet (12).

5. The electric fastening tool according to any one of claims 1-3, characterized in that, It also includes a mounting component (13) for mounting the dustproof component (9).

6. The electric fastening tool according to claim 5, characterized in that, The mounting element (13) is formed on the housing (1), or the mounting element (13) is an independently installed soft rubber sleeve.

7. The electric fastening tool according to any one of claims 1-3, characterized in that, The dustproof component (9) is elastic, or the dustproof component (9) is detachably mounted on the outside of the housing (1).

8. The electric fastening tool according to any one of claims 1-3, characterized in that, The electric fastening tool includes one of an electric screwdriver, an electric wrench, or an electric drill.

9. An electric fastening tool, comprising: Shell (1); A motor (2) is installed inside the housing (1), and the motor (2) includes a motor shaft (21); The transmission assembly (5) is supported by the housing (1) and connected to the motor (2); Impact assembly (4), connected to the transmission assembly (5), is used to output power to fasten the workpiece; Its features are, The housing (1) has at least one air inlet (12) for air intake or air outlet, and at least one of the air inlets (12) is provided with a dustproof component (9).

10. The electric fastening tool according to claim 9, characterized in that, The dustproof component (9) is detachably disposed on the outside of the housing (1).

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