Fastener driver

Abstract

This application discloses a fastener driver, which includes a striking component comprising a striking member configured to strike a fastener; a driving component configured to drive the striking member; and a motor configured to output driving force to drive the driving component. The driving component includes a driving wheel configured to engage with the striking member to drive the striking member to move along the extension direction of the striking member. The distance D from the center of mass of the driving wheel to its axis of rotation is less than or equal to 1.5 mm. This application can reduce the regular wobbling of the fastener driver and improve the user's operating feel.

Description

Technical Field

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

[0002] In practical production and daily life, nails are sometimes needed to connect or fix objects. Manual hammering would be labor-intensive and inefficient. Therefore, nail guns are commonly used to drive nails into the work surface. A nail gun acts as a fastener actuator, used to quickly drive nails into the work surface. Compressed air driven nail guns have a compressed air cylinder; the thrust generated by the extended piston rod acts as the driving force on the impact component, driving the nail into the work surface. Mechanical spring-driven nail guns have an impact spring (compression spring); after the impact spring is compressed, its restoring force acts as the driving force on the impact component, driving the nail into the work surface.

[0003] Air-driven nail guns are equipped with a drive wheel, which rotates to move a meshing firing pin. To achieve a lightweight design, the drive wheel is typically designed in a crescent shape. When the drive wheel is crescent-shaped, its center of gravity deviates from the drive wheel's center of rotation, resulting in a moment of inertia. This moment of inertia causes the nail gun to wobble rhythmically, affecting the lifespan of the bearings supporting the drive wheel and the stability of the nail gun, while also reducing the user's handling experience. This discomfort is particularly noticeable with some larger nail guns where the drive wheel itself is quite heavy.

[0004] This section provides background information related to this application, which is not necessarily prior art. Summary of the Invention

[0005] One objective of this application is to solve or at least alleviate some or all of the aforementioned problems.

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

[0007] A fastener driver, comprising:

[0008] Striking components, including striking elements configured to strike fasteners;

[0009] The driving component is configured to drive the striking component;

[0010] The motor is at least capable of outputting driving force to drive the drive assembly;

[0011] The driving component includes:

[0012] A drive wheel is configured to engage with the striking member to drive the striking member to move along the extension direction of the striking member;

[0013] Wherein, the distance D from the center of mass of the drive wheel to the axis of rotation of the drive wheel is less than or equal to 1.5 mm.

[0014] In some embodiments, the drive wheel has a drive portion and a clearance portion formed circumferentially around the axis of rotation. The drive portion is provided with a plurality of axle pins spaced evenly, which can engage with the striking member to drive the striking member. The clearance portion has a clearance position to disengage the drive wheel from the striking member.

[0015] In some embodiments, the clearance portion is provided with a counterweight.

[0016] In some embodiments, the counterweight is integrally formed with the main body of the drive wheel.

[0017] In some embodiments, the counterweight can be detachably installed onto the clearance portion.

[0018] In some embodiments, the counterweight is made of the same material as the main body of the drive wheel.

[0019] In some embodiments, the weight of the drive wheel is greater than or equal to 40g.

[0020] In some embodiments, the drive wheel cavity contains a support bearing.

[0021] In some embodiments, a fixed shaft is further included, the fixed shaft having a first end for fixing the fixed shaft and a second end for mounting the support bearing.

[0022] In some embodiments, a transmission housing is further included, wherein a first end of the fixed shaft is fixed to the transmission housing, and the drive wheel is housed within the transmission housing.

[0023] A fastener driver, comprising:

[0024] Striking components, including striking elements configured to strike fasteners;

[0025] The driving component is configured to drive the striking component;

[0026] The motor is at least capable of outputting driving force to drive the drive assembly;

[0027] The driving component includes:

[0028] A drive wheel is configured to engage with the striking member to drive the striking member to move along the extension direction of the striking member;

[0029] Also includes:

[0030] The counterweight can cooperate with the drive wheel to balance the center of gravity offset of the drive wheel.

[0031] In some embodiments, the drive wheel has a drive portion and a clearance portion formed circumferentially about the axis of rotation. The drive portion is provided with a plurality of axle pins spaced evenly, which can engage with the striking member to drive the striking member. The clearance portion has a clearance position to disengage the drive wheel from the striking member.

[0032] In some embodiments, the counterweight is integrally formed with the main body of the drive wheel.

[0033] In some embodiments, the counterweight can be detachably installed onto the clearance portion.

[0034] In some embodiments, the counterweight is made of the same material as the main body of the drive wheel.

[0035] In some embodiments, the drive wheel cavity contains a support bearing.

[0036] In some embodiments, a fixed shaft is further included, having a first end for fixing the fixed shaft and a second end for mounting the support bearing.

[0037] In some embodiments, a transmission housing is further included, wherein a first end of the fixed shaft is fixed to the transmission housing, and the drive wheel is housed within the transmission housing.

[0038] The advantages of this application are:

[0039] The fastener driver provided in this application has a motor that drives a drive wheel of a drive assembly. The drive wheel moves an impactor along the extension direction of the impactor. The center of mass of the drive wheel is as close as possible to its rotation axis, which reduces the rotational inertia of the drive wheel, thereby reducing the impact on the life of the bearing supporting the drive wheel and the stability of the nail gun. Furthermore, it reduces the regular shaking of the fastener driver, improving the user's handling experience. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of a fastener driver;

[0041] Figure 2 This is a schematic diagram of the locking of the nail cap assembly and the nail seat in a fastener driver;

[0042] Figure 3 This is a schematic diagram of the unlocking of the nail cap assembly and nail seat in a fastener driver;

[0043] Figure 4 This is a schematic diagram of the pivoting of a pin cap assembly relative to a pin seat in a fastener driver;

[0044] Figure 5This is a schematic diagram of a nail cap assembly and a trigger assembly in a fastener driver;

[0045] Figure 6 This is an exploded view of the nail cover assembly and adjustment assembly in a fastener driver;

[0046] Figure 7 This is a schematic diagram illustrating the locking mechanism between the lower cover and the pin seat in a fastener driver.

[0047] Figure 8 This is a schematic diagram illustrating the unlocking of the lower cover and pin seat in a fastener driver.

[0048] Figure 9 This is an exploded view of an adjustment component in a fastener driver;

[0049] Figure 10 This is a schematic diagram of the decoupling of movable and fixed parts in a fastener driver;

[0050] Figure 11 This is a schematic diagram of a fastener driver at its longest impact depth;

[0051] Figure 12 This is a schematic diagram of a fastener driver at an intermediate impact depth;

[0052] Figure 13 This is a schematic diagram of a fastener driver at its shortest impact depth;

[0053] Figure 14 This is a schematic diagram of an adjusting component and a movable component in a fastener driver;

[0054] Figure 15 This is a cross-sectional view of a fastener driver;

[0055] Figure 16 This is a cross-sectional view of a drive component in a fastener driver;

[0056] Figure 17 This is a schematic diagram of a drive wheel in a fastener driver;

[0057] Figure 18 This is a top view of the drive wheel in a fastener driver.

[0058] In the picture:

[0059] 100. Fastener driver; 110. Nail ejection channel; 1. Nail holder; 11. Connecting plate; 12. Second interlocking part; 111. Slot; 12. Second interlocking part; 13. First mounting hole; 2. Nail cover assembly; 21. Upper cover assembly; 211. Locking element; 22. Lower cover; 221. First interlocking part; 222. Pin; 223. Second mounting hole; 23. Screw; 3. Trigger assembly; 31. Trigger rod; 311. Receiving part; 4. Adjustment assembly; 41. Adjusting element ; 42. Fixing component; 43. Movable component; 431. First elastic component; 44. Detection element; 5. Second elastic component; 6. Striking assembly; 61. Striking component; 7. Drive assembly; 71. Transmission box; 711. Upper cover; 712. Lower cover; 713. Bolt; 72. Fixed shaft; 721. First end; 722. Second end; 73. Drive wheel; 731. Flat part; 7321. Shaft pin; 74. Support bearing; 8. Transmission assembly; 81. Transmission shaft; 9. Motor. Detailed Implementation

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] like Figure 1An embodiment of a fastener driver according to this application is shown. The fastener driver is used to drive a fastener into a working surface. For example, the fastener is a nail, which can be a flathead nail or a U-shaped nail. The fastener driver drives the fastener to quickly drive into the working surface, thereby securing the working surface to a platform on the back side of the working surface. In this embodiment, the fastener driver is, for example, a nail gun. Optionally, the fastener driver includes a mechanical spring-type nail gun that utilizes the force of a compressed coil spring as an impact force (e.g., driving force). Optionally, the fastener driver is a cylinder-type nail gun that performs the nailing action by compressing gas in a cylinder, which pushes out a firing assembly.

[0069] The fastener driver is powered by a rechargeable battery pack. In some embodiments, the battery pack is a battery module that, in conjunction with a corresponding power supply circuit, powers the fastener driver. Those skilled in the art will understand that in other embodiments, the fastener driver can also be powered by other power sources, such as an AC power line connected to mains power, or other connecting cables that can be connected to a power supply device. Mains power or other power supply devices, in conjunction with corresponding rectification, filtering, and voltage regulation circuits, power the corresponding components of the fastener driver. The term "battery pack" will be used hereinafter to refer to a power source, but this should not be construed as limiting the scope of this application.

[0070] like Figures 1-14 As shown, this application provides a fastener driver 100. The fastener driver 100 includes a nail holder 1, a nail cover assembly 2, a trigger assembly 3, and an operable adjustment assembly 4.

[0071] The nail holder 1 is mounted on the nail outlet of the clip assembly of the fastener driver 100. A nail outlet channel 110 is formed between the nail cover assembly 2 and the nail holder 1. The trigger assembly 3 includes a trigger rod 31, which is movable relative to the nail holder 1 or the nail cover assembly 2 along its extension direction. An operable adjustment assembly 4 is configured to adjust the relative position of the trigger rod 31 with respect to the nail holder 1 or the nail cover assembly 2; wherein the trigger rod 31 and the adjustment assembly 4 are configured to pivot relative to the nail holder 1 with the nail cover assembly 2.

[0072] When the fastener driver 100 is in operation, the relative position of the trigger rod 31 to the nail holder 1 or the nail cover assembly 2 can be adjusted via the operable adjustment component 4. After adjusting the position of the trigger rod 31, nailing can begin. If nail jamming occurs, simply rotate the nail cover assembly 2 relative to the nail holder 1 to open it, which will completely expose the nail stuck in the nail outlet channel 110. This allows for quick and efficient nail removal, ensuring both efficiency and ease of operation.

[0073] like Figures 5-6As shown, in some embodiments, the nail cover assembly 2 includes an upper cover assembly 21 and a lower cover 22 connected to each other, and the projection of the adjusting component 4 in the horizontal plane at least partially falls within the range of the projection of the upper cover assembly 21 in the horizontal plane. This arrangement reduces the space occupied by the adjusting component 4 and the upper cover assembly 21, thereby ensuring the compactness of the fastener driver 100 and facilitating its use in confined spaces. The adjusting component 4 can be integrated between the upper cover assembly 21 and the lower cover 22, further improving the integration of the adjusting component 4 with the nail cover assembly 2 and facilitating the placement of the adjusting component 4 on the nail cover assembly 2. Furthermore, the upper cover assembly 21 and the lower cover 22 can be used to protect the adjusting component 4.

[0074] like Figures 2-4 As shown, in some embodiments, the top cover assembly 21 includes a locking member 211, which is configured to engage with the nail holder 1 to lock the nail cover assembly 2 onto the nail holder 1. By providing the locking member 211, when the fastener driver 100 is operating, the locking member 211 locks the nail cover assembly 2 to the nail holder 1, thereby ensuring that the nail cover assembly 2 does not move relative to the nail holder 1 during nailing. Connecting plates 11 are provided at intervals on the nail holder 1, extending towards the top cover assembly 21. A slot 111 is provided on the connecting plate 11. The locking member 211 is U-shaped and rotatably mounted on the cover plate of the top cover assembly 21 through its opening. The locking member 211 can engage with the slot 111, thereby locking the nail cover assembly 2 to the top seat. To unlock, the locking member 211 is disengaged from the slot 111, allowing the nail cover assembly 2 to pivot.

[0075] like Figure 6 As shown, in some embodiments, the upper cover assembly 21 and the lower cover 22 are fixedly connected by screws 23, retaining pins, or clips. By installing the upper cover assembly 21 and the lower cover 22 in the above manner, it is convenient to quickly install and remove the upper cover assembly 21 and the lower cover 22.

[0076] like Figures 2-4As shown, in some embodiments, the lower cover 22 forms a first interlocking part 221, and the nail holder 1 forms a second interlocking part 12. When the nail cover assembly 2 is locked onto the nail holder 1 by the locking member 211, the second interlocking part 12 can lock the lower cover 22. By cooperating with the first interlocking part 221 and the second interlocking part 12, the lower cover 22 and the nail holder 1 are fixedly locked together, thereby ensuring a stable connection between the nail cover assembly 2 and the nail holder 1 and preventing the nail cover assembly 2 from separating from the nail holder 1 when the fastener driver 100 is driving nails. The first interlocking part 221 is a protrusion, and the second interlocking part 12 is a locking groove. When the first interlocking part 221 and the second interlocking part 12 are engaged, the first interlocking part 221 is located in the locking groove. When it is necessary to pivot the nail cover assembly 2 relative to the nail holder 1, moving the lower cover 22 in the nailing direction will separate the first interlocking part 221 from the second interlocking part 12. By using the first interlocking part 221 and the second interlocking part 12 in cooperation, the nail cover assembly 2 and the nail seat 1 can both withstand a certain impact force during the nailing process, reduce the force on the locking part 211, improve the stress state of the locking part 211, and thus extend the service life of the locking part 211.

[0077] like Figures 6-8 As shown, in some embodiments, the nail holder 1 is provided with a first mounting hole 13, which can cooperate with the second mounting hole 223 on the lower cover 22 to install the nail cover assembly 2 onto the nail holder 1. The first mounting hole 13 on the nail holder 1 is a slotted hole. During the assembly of the nail holder 1 and the lower cover 22, a pin 222 passes through the first mounting hole 13 and the second mounting hole 223. The pin 222 can move within the first mounting hole 13 to lock and separate the first interlocking part 221 and the second interlocking part 12. Furthermore, the pin 222 can rotate relative to the first mounting hole 13. After the nail holder 1 and the nail cover assembly 2 are separated, the nail cover assembly 2 can pivot relative to the nail holder 1 via the pin 222, facilitating subsequent removal of the retaining pin. The pin 222 can be fixed to the lower cover 22 or can be provided independently; no further restrictions are imposed here.

[0078] like Figure 6 As shown, in some embodiments, the adjustment component 4 includes a detection element 44, which is configured to move with the trigger lever 31 and be detected when it moves to a preset position to trigger a working signal. By setting the detection element 44, a safety protection function can be provided when the fastener driver 100 is in operation. A working signal is only given when the trigger lever 31 is detected to have moved to the preset position, avoiding malfunctions. The detection element 44 can be made of a ferromagnetic material such as a magnet. After the detection element 44 moves to the preset position, it is recognized by a safety Hall element on the fastener driver 100, thereby emitting a nail-driving signal. In other embodiments, a collision sensor or a proximity sensor can also be used as the detection element 44; no further limitations are imposed here.

[0079] like Figures 9-13 As shown, in some embodiments, the adjustment component 4 includes an adjustment member 41, a movable member 43, and a fixing member 42. The adjustment member 41 is configured to be operable by the user to adjust the impact depth. The movable member 43 is connected to the adjustment member 41 and can move under the action of the adjustment member 41. The fixing member 42 can cooperate with the movable member 43 to lock the trigger rod 31. When it is necessary to adjust the impact depth of the fastener driver 100, the adjustment member 41 is operated, and the movable member 43 is moved under the action of the adjustment member 41, so that the movable member 43 is separated from the fixing member 42, releasing the lock on the trigger rod 31. Then, the relative position of the trigger rod 31 with respect to the nail seat 1 or the nail cover assembly 2 can be adjusted. After adjustment, the adjustment member 41 is operated to lock the position of the trigger rod 31 with the cooperation of the movable member 43 and the fixing member 42. In this way, it is convenient to quickly adjust the relative position of the trigger rod 31, thereby flexibly meeting the needs of impact depth in different situations.

[0080] like Figure 10 As shown, in some embodiments, the adjusting member 41 can unlock the locking mechanism with the fixing member 42 when it moves along the first direction; the adjusting member 41 can drive the trigger rod 31 to move when it moves along the second direction. The first direction is the X direction, and the second direction is the Y direction. When adjusting the relative position of the trigger rod 31, the adjusting member 41 is moved along the first direction, thereby driving the movable member 43 to move along the first direction, causing the movable member 43 to separate from the fixing member 42. Then, the trigger rod 31 can be moved along the second direction to adjust its relative position. Unlocking and adjusting the relative position of the trigger rod 31 can be achieved with a single adjusting member 41, resulting in a simple structure and easy operation. In some embodiments, the first direction and the second direction are substantially perpendicular. Using this method, the construction worker only needs to press along the first direction to unlock the movable member 43 from the fixing member 42, and then push the adjusting member 41 along the second direction to adjust the position of the trigger rod 31, facilitating operation.

[0081] like Figure 1 As shown, this application also provides a fastener driver 100, which includes a nail holder 1, a nail cover assembly 2, a trigger assembly 3, and an operable adjustment assembly 4.

[0082] Among them, such as Figures 1-3As shown, the pin holder 1 is mounted on the pin outlet of the magazine assembly. The pin cover assembly 2 includes an upper cover assembly 21 and a lower cover 22, and the pin cover assembly 2 can be locked onto the pin holder 1. A pin outlet channel 110 is formed on the opposing surfaces of the pin holder 1 and the lower cover 22, which is exposed when the pin cover assembly 2 is unlocked from the pin holder 1. A trigger assembly 3 is disposed between the upper cover assembly 21 and the lower cover 22, and the trigger assembly 3 includes a trigger rod 31, which is configured to move relative to the pin holder 1 or the pin cover assembly 2 along the extension direction of the trigger rod 31. An operable adjustment assembly 4 is disposed between the upper cover assembly 21 and the lower cover 22, and the operable adjustment assembly 4 is configured to adjust the striking depth of the fastener driver 100.

[0083] By integrating the adjustment component 4 and the trigger component 3 onto the nail cover component 2, the fastener driver 100 becomes more compact and easier to arrange. Furthermore, the nail channel 110 is exposed when the nail cover component 2 is unlocked from the nail holder 1, facilitating the handling of stuck nails. Through these methods, the nail cover component 2 integrates triggering and depth adjustment functions while also enabling rapid nail removal.

[0084] like Figure 1 As shown, this application also provides a fastener driver 100, which includes a nail holder 1, a nail cover assembly 2, a striking assembly, a trigger assembly 3, and an operable adjustment assembly 4.

[0085] like Figures 9-13 As shown, the nail holder 1 is installed at the nail outlet of the magazine assembly. The nail cover assembly 2 and the nail holder 1 form a nail delivery channel 110. The striking assembly includes a striking element configured to strike a fastener, wherein the fastener is a nail and the striking element is a firing pin. The triggering assembly 3 includes a trigger rod 31, which is configured to move along its extension direction to trigger a working signal. The operable adjustment assembly 4 is configured to adjust the relative position of the trigger rod 31 with the nail holder 1 or the nail cover assembly 2. The adjustment assembly 4 includes a fixing member 42 and an adjusting member 41. The fixing member 42 is interlocked with the trigger rod 31. The adjusting member 41 is configured to be operated by the user to decouple or couple the trigger rod 31 with the fixing member 42. Specifically, when the adjusting member 41 is operated in a first operating mode, the trigger rod 31 is decoupled from the fixing member 42; when the adjusting member 41 is operated in a second operating mode, it can move the trigger rod 31 to adjust its relative position.

[0086] When adjusting the nailing depth of the fastener driver 100, the adjusting member 41 is operated in the first mode to decouple the trigger rod 31 from the fixing member 42. Then, the adjusting member 41 is operated in the second mode to move the trigger rod 31 and adjust its relative position with the nail seat 1 or nail cover assembly 2. After adjustment, the adjusting member 41 is operated to couple the trigger rod 31 with the fixing member 42, locking the position of the trigger rod 31. Adjusting the position of the trigger rod 31 only requires operating the adjusting member 41 according to the first and second modes, facilitating quick operation. Furthermore, using the trigger rod 31 to trigger the working signal provides safety protection when the fastener driver 100 is in operation. A working signal is only given when the trigger rod 31 is detected to have moved to the preset position, preventing misoperation.

[0087] In some embodiments, at least the operating direction of the first operating mode differs from that of the second operating mode. By distinguishing the directions of the first and second operating modes, operators can effectively master the operating methods and thus skillfully adjust the striking depth.

[0088] like Figures 9-14 As shown, in some embodiments, the adjusting component 4 further includes a movable member 43 connected to the adjusting member 41. The movable member 43 can move under the action of the adjusting member 41 to decouple from the fixed member 42. The movable member 43 cooperates with the fixed member 42 to lock the trigger rod 31. When decoupling is required, the movable member 43 can be decoupled from the fixed member 42 simply by operating the adjusting member 41. The movable member 43 and the adjusting member 41 can be designed as an integrated structure for easy manufacturing and installation, or they can be designed as separate structures; no further restrictions are imposed here.

[0089] like Figure 10 As shown, in some embodiments, when the adjusting member 41 is operated in the first operating mode, the movable member 43 moves in a direction perpendicular to the extension direction of the trigger rod 31. By operating the adjusting member 41 in the above manner, the movable member 43 can be decoupled from the fixed member 42, thereby unlocking the trigger rod 31. The operator can adjust the relative position of the trigger rod 31 with respect to the pin seat 1 according to actual needs.

[0090] In some embodiments, when the adjusting member 41 is operated in the second operating mode, the movable member 43 can drive the trigger rod 31 to move along the extension direction of the trigger rod 31. After the trigger rod 31 is released from locking, the adjusting member 41 is operated along the extension direction of the trigger rod 31 to adjust the relative position between the trigger rod 31 and the nail seat 1.

[0091] like Figure 9As shown, in some embodiments, the trigger rod 31 is provided with a receiving portion 311 to accommodate the movable member 43. By providing the receiving portion 311 to accommodate the movable member 43, the structure of the trigger rod 31 can be kept compact, and the movable member 43 and the trigger rod 31 can be integrated together. When the movable member 43 is coupled with the fixed member 42, the movement of the trigger rod 31 can be limited. When the adjusting member 41 is operated in the first operating mode to decouple the movable member 43 from the fixed member 42, the adjusting member 41 is operated in the second operating mode. The adjusting member 41 drives the movable member 43 to move, thereby driving the trigger rod 31 to move through the movable member 43, and realizing the adjustment of the position of the trigger rod 31.

[0092] like Figures 9-12 As shown, in some embodiments, a first elastic member 431 is provided within the receiving portion 311. The first elastic member 431 is configured to be in a compressed state when the adjusting member 41 is operated, and to reset the movable member 43 to interlock with the fixed member 42 when the adjusting member 41 is not operated. The first elastic member 431 is a compression spring, disposed in the receiving portion 311, with one end abutting against the bottom of the receiving portion 311 and the other end abutting against the movable member 43. When the adjusting member 41 is not operated, the movable member 43 is interlocked with the fixed member 42 under the action of the first elastic member 431. After adjusting the position of the trigger rod 31 according to the first and second operating methods, the first elastic member 431 can push the movable member 43 to reset and couple with the fixed member 42 under the action of its own elastic restoring force.

[0093] like Figure 6 As shown, in some embodiments, the adjustment assembly 4 further includes a detection element 44, which is configured to be detected when the trigger rod 31 abuts against the workpiece to trigger a working signal. The detection element 44 may be made of a ferromagnetic material such as a magnet. When the trigger rod 31 abuts against the workpiece, the detection element 44 moves to a preset position and is recognized by the safety Hall element on the fastener driver 100, thereby emitting a nail-driving signal. In other embodiments, a collision sensor or a proximity sensor may also be used as the detection element 44, without further limitations.

[0094] like Figures 9-13As shown, in some embodiments, the movable member 43 and the fixed member 42 are configured to be interlocked by ratchet; the tilt angle α of the ratchet is greater than or equal to 75° and less than or equal to 105°. The tilt angle of the ratchet can be 80°, 85°, 90°, 95°, etc. The ratchet tooth shape has a special angle design. Under normal operation, the pushing force of a human hand is insufficient to push the movable member 43 and the fixed member 42 apart. However, if the fastener driver 100 is dropped or subjected to a large impact, the movable member 43 and the fixed member 42 can slip off to absorb the impact force, thereby effectively protecting the trigger component 3 and the adjustment component 4. Moreover, the movable member 43 and the fixed member 42 can quickly separate or engage. Among them, the movable member 43 can drive the trigger rod 31 to move. When adjusting the striking depth, the movable member 43 can move a small range perpendicular to the trigger rod 31 to achieve quick disengagement or closure with the fixed member 42, and couple with the fixed member 42 when nailing. After the movable part 43 is decoupled from the fixed part 42, the position of the trigger rod 31 can be quickly adjusted according to the required impact depth. Compared with the structure of adjusting the trigger rod 31 by using a lead screw and nut, the movable part 43 and the fixed part 42 are set to adjust the trigger rod 31 by ratchet interlocking, which is faster.

[0095] like Figure 9 As shown, in some embodiments, the fastener driver 100 further includes a second elastic element 5, which is disposed at the rear end of the adjusting assembly 4. The second elastic element 5 is configured to reset the trigger rod 31 after it is triggered. The second elastic element 5 is a compression spring, and one end of the second elastic element 5 abuts against the end of the fixing member 42 away from the trigger rod 31. The detection element 44 is fixedly disposed on the fastener. When the trigger rod 31 abuts against the workpiece, the trigger rod 31 drives the fixing member 42 to move away from the workpiece via the movable member 43, thereby compressing the second elastic element 5. When the detection element 44 moves to a preset position, it is recognized by the safety Hall element on the fastener driver 100, thereby issuing a nailing signal. After nailing is completed and the trigger rod 31 is disengaged from the workpiece, the second elastic element 5 can push the fixing member 42, thereby pushing the trigger rod 31 to reset.

[0096] like Figures 15-16 As shown, this application provides a fastener driver. The fastener driver 100 includes a striking component 6, a driving component 7, and a motor 9.

[0097] The striking assembly 6 includes a striking member 61 configured to strike a fastener. A drive assembly 7 is configured to drive the striking member 61, and a motor 9 outputs driving force to drive the drive assembly 7. The drive assembly 7 includes a drive wheel 73, a transmission housing 71, and a fixed shaft 72. The drive wheel 73 is configured to engage with the striking member 61 to drive the striking member 61 to move along its extension direction; the transmission housing 71 at least accommodates the drive wheel 73; and the fixed shaft 72 is non-rotatably mounted to the transmission housing 71.

[0098] When the fastener driver 100 is operating, the motor 9 drives the drive wheel 73 to rotate. The drive wheel 73 drives the meshing striking member 61 to move along the extension direction of the striking member 61 for energy storage and striking. Since the fixed shaft 72 is non-rotatably mounted in the transmission box 71, the fixed shaft 72 is fixed relative to the transmission box 71. When the motor 9 drives the drive wheel 73 to rotate, the fixed shaft 72 will not bend, thereby preventing the drive wheel 73 from wobbling and ensuring effective meshing and transmission between the drive wheel 73 and the striking member 61. This extends the service life of the drive wheel 73 and the striking member 61 and improves the performance of the fastener driver 100.

[0099] like Figure 16 As shown, in some embodiments, the fixed shaft 72 includes a first end 721 fixed to the transmission housing 71 and a second end 722 for mounting the drive wheel 73. By fixing the first end 721 of the fixed shaft 72 to the transmission housing 71, the relative position of the fixed shaft 72 in the transmission housing 71 can be defined, preventing the fixed shaft 72 from moving relative to the transmission housing 71 body. This, in turn, defines the relative position between the drive wheel 73 mounted on the second end 722 of the fixed shaft 72 and the striking member 61, ensuring that the drive wheel 73 can effectively cooperate with the striking member 61, extending the service life of the drive wheel 73 and the striking member 61, and reducing vibration during the operation of the fastener driver 100.

[0100] like Figures 15-16 As shown, in some embodiments, the first end 721 is set away from the motor 9, and the second end 722 is set close to the motor 9. This arrangement facilitates the placement of the fixed shaft 72 in the transmission box 71, and the placement of the drive wheel 73 at the second end 722 close to the motor 9 shortens the transmission chain between the motor 9 and the drive wheel 73, thus facilitating the interaction between the motor 9 and the drive wheel 73.

[0101] like Figure 16 As shown, in some embodiments, the transmission housing 71 includes an upper cover 711 and a lower cover 712, with a first end 721 fixed to the upper cover 711. Designing the transmission housing 71 as an upper cover 711 and a lower cover 712 facilitates the installation of a fixed shaft 72 and a drive wheel 73 within the transmission housing 71. The upper cover 711 and the lower cover 712 are connected by multiple bolts 713, facilitating the assembly and disassembly of the transmission housing 71.

[0102] like Figure 16 As shown, in some embodiments, the drive assembly 7 further includes a support bearing 74, which is configured to support the drive wheel 73. By providing the support bearing 74, friction can be reduced, ensuring smooth rotation of the drive wheel 73.

[0103] like Figure 16As shown, in some embodiments, a support bearing 74 is sleeved on the second end 722 of the fixed shaft 72. By providing the support bearing 74 between the second end 722 of the fixed shaft 72 and the drive wheel 73, the smooth rotation of the drive wheel 73 relative to the fixed shaft 72 can be ensured. In other embodiments, a high-precision bushing can also be fixedly provided on the second end 722 of the fixed shaft 72, which can also support the drive wheel 73 and ensure the smooth rotation of the drive wheel 73.

[0104] like Figure 16 As shown, in some embodiments, the support bearing 74 is housed within the wheel cavity of the drive wheel 73. This arrangement allows the support bearing 74 to effectively support the drive wheel 73 while reducing the space occupied by the support bearing 74. The support bearing 74 can be a single bearing with a relatively long axial length, or it can consist of several bearings with shorter axial lengths arranged at intervals within the wheel cavity of the drive wheel 73; no further limitations are imposed here.

[0105] like Figure 16 As shown, in some embodiments, the drive wheel 73 is disposed between the first end 721 of the fixing member and the lower cover 712. By arranging the drive wheel 73 in the transmission housing 71, the compactness of the drive assembly 7 can be improved, facilitating its arrangement on the fastener driver 100.

[0106] like Figure 16 As shown, in some embodiments, the center of the axle pin 7321 of the drive wheel 73 is closer to the first end 721 of the fixed shaft 72 than the center of the support bearing 74. This arrangement fully utilizes the strength of the connection between the first end 721 of the fixed shaft 72 and the upper cover 711. Because the first end 721 of the fixed shaft 72 is not easily bent, the drive wheel 73 can rotate stably.

[0107] In some embodiments, the length h3 of the first end 721 is greater than or equal to 10 mm and less than or equal to 20 mm. By limiting the length range of the first end 721, the connection strength of the fixed shaft 72 after it is connected to the upper cover 711 through the first end 721 can be guaranteed. The upper cover 711 effectively supports the first end 721, preventing the fixed shaft 72 from bending when the drive wheel 73 is under force because the first end 721 of the fixed shaft 72 is too long.

[0108] In some embodiments, the fastener driver 100 further includes a transmission assembly 8, which includes a drive shaft 81, and a drive wheel 73 is rotatably connected to the drive shaft 81. The transmission assembly 8, which employs a gearbox, is arranged between the motor 9 and the drive wheel 73 to reduce speed and increase torque. The motor 9 drives the drive shaft 81 of the transmission assembly 8, thereby rotating the drive wheel 73, ensuring that the drive wheel 73 effectively drives the striking member 61.

[0109] In some embodiments, the drive wheel 73 is fixedly provided with a flat portion 731, which can be connected to the drive shaft 81. By directly connecting the flat portion 731 to the drive shaft 81, installation is convenient, and the structure is compact, achieving a miniaturized design of the fastener driver 100, making it easy to use in confined spaces. The flat portion 731 and the drive wheel 73 are an integrated structure, which facilitates the manufacturing of the drive wheel 73 and ensures the strength of the connection between the flat portion 731 and the drive wheel 73. In other embodiments, the flat portion 731 and the drive wheel 73 can also be designed as separate structures, connected and installed by welding or screws; no further restrictions are imposed here.

[0110] This application also provides a fastener driver. The fastener driver 100 includes a striking component 6, a driving component 7, and a motor 9.

[0111] The striking assembly 6 includes a striking element 61 configured to strike a fastener, wherein the fastener is a nail. The drive assembly 7 is configured to drive the striking element 61, and the motor 9 outputs driving force to drive the drive assembly 7. The drive assembly 7 includes a drive wheel 73, a support bearing 74, and a fixed shaft 72. The drive wheel 73 is configured to engage with the striking element 61 to drive the striking element 61 to move along its extension direction. The fixed shaft 72 is configured to mount the support bearing 74.

[0112] During the rotation of the drive wheel 73 driven by the motor 9, the drive wheel 73 is supported by the fixed shaft 72 and the support bearing 74, thereby ensuring that the drive wheel 73 rotates smoothly relative to the fixed shaft 72. This prevents the drive wheel 73 from tilting at an angle with the striking member 61 during long-term operation, thus ensuring the service life of the drive wheel 73 and the striking member 61.

[0113] The support bearing 74 and the drive wheel 73 overlap axially at least partially. This arrangement improves the compactness of the drive wheel 73 and the support bearing 74 after installation. Furthermore, the support bearing 74 supports the drive wheel 73, ensuring stable rotation of the drive wheel 73 under the drive of the motor 9.

[0114] In some embodiments, the axial overlap ratio between the support bearing 74 and the drive wheel 73 is substantially greater than or equal to 0.5. By limiting the overlap ratio between the support bearing 74 and the drive wheel 73, the drive wheel 73 and the support bearing 74 can overlap as much as possible, thereby further improving the compactness of the drive assembly 7 and enabling the support bearing 74 to provide more effective support for the drive wheel 73.

[0115] In some embodiments, the drive assembly 7 further includes a transmission housing 71, with one end of the fixed shaft 72 fixedly mounted to the transmission housing 71 and the other end housed within the transmission housing 71. The transmission housing 71 protects the drive wheel 73 and the support bearing 74 located within it. By fixing one end of the fixed shaft 72 to the transmission housing 71, the relative position of the fixed shaft 72 within the transmission housing 71 is defined, preventing movement of the fixed shaft 72 relative to the transmission housing 71. This defines the relative position between the drive wheel 73 mounted on the fixed shaft 72 and the striking member 61, ensuring effective engagement between the drive wheel 73 and the striking member 61, extending the service life of both, and reducing vibration during the operation of the fastener driver 100.

[0116] In some embodiments, a support bearing 74 is sleeved on one end of the fixed shaft 72 housed within the transmission housing 71. This arrangement ensures smooth rotation of the drive wheel 73 relative to the fixed shaft 72 after installation. Furthermore, the drive wheel 73 is mounted on the end of the fixed shaft 72 closest to the motor 9, facilitating a transmission connection between the motor 9 and the drive wheel 73. In other embodiments, a high-precision bushing can be fixedly installed at the second end 722 of the fixed shaft 72, which also supports the drive wheel 73 and ensures smooth rotation.

[0117] This application also provides a fastener driver, the fastener driver 100 including a striking component 6, a driving component 7 and a motor 9.

[0118] The striking assembly 6 includes a striking member 61 configured to strike a fastener. A drive assembly 7 is configured to drive the striking member 61, and a motor 9 outputs driving force to drive the drive assembly 7. The drive assembly 7 includes a drive wheel 73 and a fixed shaft 72. The drive wheel 73 has multiple circumferentially arranged engagement positions that can engage with the striking member 61 to drive the striking member 61 to move along its extension direction. It is understood that the drive wheel 73 has multiple circumferentially arranged pins, with portions of the pins embedded within the drive wheel 73 and portions exposed and visible outside the drive wheel 73. To protect the pins exposed outside the drive wheel 73, a sleeve can be fitted onto these exposed portions. In this case, the sleeve can be understood as an engagement position that engages with the striking member 16. In some embodiments, if no sleeve is provided around the pin, the portion of the pin exposed and visible outside the drive wheel 73 serves as the engagement position. The fixed shaft 72 has a first end 721 for fixed mounting; wherein, the minimum distance h1 from the geometric center surface of the engagement position in the direction perpendicular to the fixed shaft 72 to the first end 721 is greater than or equal to 3.5 mm. The minimum distance h1 from the geometric center surface of the engagement position in the direction perpendicular to the fixed shaft 72 to the first end 721 can be 3.6 mm, 3.7 mm, 3.8 mm, etc.

[0119] During the rotation of the drive wheel 73 driven by the motor 9, the striking member 61 is driven to move along the extension direction of the striking member 61. Since the fixed shaft 72 has a first end 721, the fixed shaft 72 can be fixedly mounted on the fastener driver 100. By limiting the minimum distance h1 from the geometric center plane of the engagement position to the first end 721, it is possible to ensure that the drive wheel 73 is easily mounted on the fixed shaft 72 while ensuring that the drive wheel 73 is as close as possible to the first end 721 of the fixed shaft 72. This fully utilizes the strength of the fixed shaft 72 near the first end 721, while shortening the lever arm from the geometric center plane of the engagement position to the first end 721, improving the force condition of the fixed shaft 72 at the first end 721, ensuring that there is no tilt angle between the drive wheel 73 and the striking member 61 due to the bending of the fixed shaft 72, and ensuring the service life of the drive wheel 73 and the striking member 61.

[0120] In some embodiments, the drive assembly 7 further includes a transmission housing 71, and the first end 721 of the fixed shaft 72 is fixedly mounted on the transmission housing 71. The transmission housing 71 protects the drive wheel 73 located within it. By fixing one end of the fixed shaft 72 to the transmission housing 71, the relative position of the fixed shaft 72 within the transmission housing 71 is defined, preventing movement of the fixed shaft 72 relative to the transmission housing 71 body. This defines the relative position between the drive wheel 73 mounted on the fixed shaft 72 and the striking member 61, ensuring effective engagement between the drive wheel 73 and the striking member 61, extending the service life of both the drive wheel 73 and the striking member 61, and reducing vibration during the operation of the fastener driver 100.

[0121] In some embodiments, the transmission housing 71 includes an upper cover 711 and a lower cover 712, with a first end 721 fixed to the upper cover 711, and a drive wheel 73 housed within the housing. Designing the transmission housing 71 as an upper cover 711 and a lower cover 712 facilitates the installation of the fixed shaft 72 and the drive wheel 73 within the transmission housing 71. The upper cover 711 and the lower cover 712 are connected by multiple bolts 713, facilitating the assembly and disassembly of the transmission housing 71. Furthermore, the location of the drive wheel 73 within the housing enhances the integration of the transmission housing 71.

[0122] In some embodiments, the minimum distance h2 from the lower end face of the support bearing 74 to the first end 721 is greater than or equal to 10 mm. The minimum distance h2 from the lower end face of the support bearing 74 to the first end 721 is 11 mm, 12 mm, 13 mm, 14 mm, etc. The above limitations can guide the installation of the support bearing 74. Moreover, while ensuring that the drive wheel 73 can be easily installed on the fixed shaft 72, it can also ensure that the drive wheel 73 installed on the support bearing 74 is as close as possible to the first end 721 of the fixed shaft 72, thereby making full use of the strength of the fixed shaft 72 near the first end 721, while shortening the lever arm from the geometric center plane of the meshing position to the first end 721, improving the stress condition of the fixed shaft 72 at the first end 721, ensuring that there is no tilt angle between the drive wheel 73 and the striking member 61 due to the bending of the fixed shaft 72, and ensuring the service life of the drive wheel 73 and the striking member 61.

[0123] In some embodiments, h1 is less than or equal to h2. Through the above limitation, the center of the shaft pin sleeve 7321 of the drive wheel 73, i.e., the position where the drive wheel 73 engages with the striking member, is closer to the first end 721 of the fixed shaft 72 than the center of the support bearing 74. Therefore, during the operation of the drive wheel 73, the lever arm of the force exerted by the drive wheel 73 on the first end 721 of the fixed shaft 72 is shortened, preventing the fixed shaft 72 from bending. This ensures that there is no tilt angle between the drive wheel 73 and the striking member 61 due to the bending of the fixed shaft 72, thus guaranteeing the service life of both the drive wheel 73 and the striking member 61.

[0124] like Figures 15-18 As shown, this application provides a fastener driver 100. The fastener driver 100 includes a striking component 6, a driving component 7, and a motor 9.

[0125] The striking component 6 includes a striking member 61 configured to strike a fastener. A driving component 7 is configured to drive the striking member 61, and a motor 9 outputs driving force to drive the driving component 7. The driving component 7 includes a driving wheel 73, configured to engage with the striking member 61 to drive the striking member 61 to move along its extension direction. The distance D from the center of mass of the driving wheel 73 to its axis of rotation 734 is less than or equal to 1.5 mm. For example, the distance D from the center of mass of the driving wheel 73 to its axis of rotation 734 can be 1.4 mm, 1.3 mm, 1.2 mm, 1.1 mm, etc.

[0126] By limiting the distance between the center of mass of the drive wheel 73 and its axis of rotation 734, the center of mass of the drive wheel 73 is made as close as possible to its axis of rotation 734. This reduces the rotational inertia of the drive wheel 73, thereby reducing the impact on the lifespan of the bearings supporting the drive wheel 73 and the stability of the nail gun. Furthermore, it reduces the regular wobbling of the fastener driver 100, improving the user's handling experience.

[0127] like Figures 16-17 As shown, in some embodiments, the drive wheel 73 has a drive section 732 and a clearance section 733 formed circumferentially around the rotation axis 734. The drive section 732 is provided with a plurality of evenly spaced axle pins 7321, which can engage with the striking member 61 to drive the striking member 61. The clearance section 733 has clearance positions 7331 to disengage the drive wheel 73 from the striking member 61. The striking member 61 engages with the pins. During the rotation of the drive wheel 73 driven by the motor 9, the axle pins 7321 located in the drive section 732 engage with the striking member 61, thereby driving the striking member 61 to store energy. When the drive wheel 73 rotates to the clearance section 733, the drive wheel 73 disengages from the striking member 61. The striking member 61 strikes the fastener. In this way, continuous nailing can be achieved, and the structure is simple.

[0128] like Figures 17-18 As shown, in some embodiments, a counterweight 735 is provided on the clearance portion 733. By adding the counterweight 735 to the clearance portion 733, the weight of the clearance portion 733 is increased, so that the weight of the clearance portion 733 is close to the weight of the drive portion 732 provided with multiple shaft pins 7321, so that the center of mass of the drive wheel 73 is as close as possible to or coincide with the axis of rotation 734 of the drive wheel 73.

[0129] In some embodiments, the counterweight 735 is integrally formed with the main body of the drive wheel 73. By designing the counterweight 735 and the main body of the drive wheel 73 as an integrated structure, manufacturing is facilitated, eliminating the need for the step of installing the counterweight 735 onto the main body of the drive wheel 73. Furthermore, it ensures the connection strength between the counterweight 735 and the main body of the drive wheel 73, preventing the counterweight 735 from separating from the main body of the drive wheel 73 under centrifugal force during rotation of the drive wheel 73.

[0130] In some embodiments, the counterweight 735 is detachably mounted to the clearance portion 733. By adopting a detachable mounting method, the weight of the counterweight 735 can be changed according to actual needs, thereby flexibly adjusting the distance between the center of mass of the drive wheel 73 and the rotation axis 734 of the drive wheel 73, so that the center of mass of the drive wheel 73 is as close as possible to the rotation axis 734 of the drive wheel 73.

[0131] In some embodiments, the counterweight 735 is made of the same material as the main body of the drive wheel 73. Using the same material facilitates the manufacture of the drive wheel 73.

[0132] In some embodiments, the weight of the drive wheel 73 is greater than or equal to 40g. The weight of the drive wheel 73 can be 41g, 42g, 43g, 44g, etc. By limiting the weight of the drive wheel 73, the weight does not increase significantly after installing a counterweight on the drive wheel 73 body. Furthermore, although it adds some weight compared to a crescent-shaped drive wheel 73, the overall rotation of the drive wheel 73 is more stable, reducing vibration of the fastener actuator 100 caused by the rotation of the drive wheel 73, making operation more comfortable for the user.

[0133] like Figures 15-18 As shown, this application also provides a fastener driver 100, which includes a striking component 6, a driving component 7, and a motor 9. The striking component 6 includes a striking member 61 configured to strike a fastener. The driving component 7 is configured to drive the striking member 61; the motor 9 outputs driving force to at least drive the driving component 7. The driving component 7 includes a counterweight 735 and a driving wheel 73. The driving wheel 73 is configured to engage with the striking member 61 to drive the striking member 61 to move along the extension direction of the striking member 61. The counterweight 735 can cooperate with the driving wheel 73 to balance the center of gravity offset of the driving wheel 73.

[0134] By setting a counterweight 735 on the drive wheel 73, the center of gravity of the drive wheel 73 is adjusted so that it is as close as possible to or coincident with the axis of rotation 734 of the drive wheel 73. This reduces the moment of inertia of the drive wheel 73 during rotation, thereby reducing the impact on the life of the bearings supporting the drive wheel 73 and the stability of the nail gun. Furthermore, it reduces the regular wobbling of the fastener driver 100, improving the user's handling experience.

[0135] 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. A fastener driver, characterized in that, include: The striking component (6) includes a striking element (61) configured to strike a fastener; The driving component (7) is configured to drive the striking component (61); The motor (9) outputs driving force to drive the drive assembly (7); The driving component (7) includes: The drive wheel (73) is configured to engage with the striking member (61) to drive the striking member (61) to move along the extension direction of the striking member (61); The distance D from the center of mass of the drive wheel (73) to the axis of rotation (734) of the drive wheel (73) is less than or equal to 1.5 mm.

2. The fastener driver according to claim 1, characterized in that, The drive wheel (73) has a drive part (732) and a clearance part (733) formed circumferentially around the rotation axis (734). The drive part (732) is provided with a plurality of axle pins (7321) spaced evenly. The axle pins (7321) can engage with the striking member (61) to drive the striking member (61). The clearance part (733) has a clearance position (7331) to disengage the drive wheel (73) from the striking member (61).

3. The fastener driver according to claim 2, characterized in that, The avoidance part (733) is provided with a counterweight (735).

4. The fastener driver according to claim 3, characterized in that, The counterweight (735) is integrally formed with the main body of the drive wheel (73).

5. The fastener driver according to claim 3, characterized in that, The counterweight (735) can be detachably installed onto the clearance part (733).

6. The fastener driver according to claim 3, characterized in that, The counterweight (735) is made of the same material as the main body of the drive wheel (73).

7. The fastener driver according to claim 1, characterized in that, The weight of the drive wheel (73) is greater than or equal to 40g.

8. The fastener driver according to claim 1, characterized in that, The drive wheel (73) contains a support bearing (74) in its wheel cavity.

9. The fastener driver according to claim 8, characterized in that, It also includes a fixed shaft (72) having a first end (721) for fixing the fixed shaft (72) and a second end (722) for mounting the support bearing (74).

10. The fastener driver according to claim 9, characterized in that, It also includes a transmission box (71), the first end (721) of the fixed shaft (72) is fixed to the transmission box (71), and the drive wheel (73) is housed in the transmission box (71).

11. A fastener driver, characterized in that, include: The striking component (6) includes a striking element (61) configured to strike a fastener; The driving component (7) is configured to drive the striking component (61); The motor (9) outputs driving force to drive the drive assembly (7); The driving component (7) includes: The drive wheel (73) is configured to engage with the striking member (61) to drive the striking member (61) to move along the extension direction of the striking member (61); Also includes: The counterweight (735) can cooperate with the drive wheel (73) to balance the center of gravity offset of the drive wheel (73).

12. The fastener driver according to claim 11, characterized in that, The drive wheel (73) has a drive part (732) and a clearance part (733) formed circumferentially around the rotation axis (734). The drive part (732) is provided with a plurality of axle pins (7321) spaced evenly. The axle pins (7321) can engage with the striking member (61) to drive the striking member (61). The clearance part (733) has a clearance position (7331) to disengage the drive wheel (73) from the striking member (61).

13. The fastener driver according to claim 11, characterized in that, The counterweight (735) is integrally formed with the main body of the drive wheel (73).

14. The fastener driver according to claim 12, characterized in that, The counterweight (735) can be detachably installed onto the clearance part (733).

15. The fastener driver according to claim 11, characterized in that, The counterweight (735) is made of the same material as the main body of the drive wheel (73).

16. The fastener driver according to claim 11, characterized in that, The drive wheel (73) contains a support bearing (74) in its wheel cavity.

17. The fastener driver according to claim 16, characterized in that, It also includes a fixed shaft (72) having a first end (721) for fixing the fixed shaft (72) and a second end (722) for mounting the support bearing (74).

18. The fastener driver according to claim 17, characterized in that, It also includes a transmission box (71), the first end (721) of the fixed shaft (72) is fixed to the transmission box (71), and the drive wheel (73) is housed in the transmission box (71).

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