Fastener driver

Abstract

A fastener driver, comprising a striking assembly (12), which comprises a striking member (121) for driving a fastener; a driving mechanism (13), which comprises an impact member (133) for driving the striking member (121) and an energy storage assembly (132) for impacting on the impact member (133) when energy is released; a motor, which is configured to drive the driving mechanism (13); and a support member (19), which is arranged at the front end of the impact member (133) close to the striking member (121) in an impact direction, wherein when the impact member (133) is impacted to the foremost end, a buffer space (17) is formed between the support member (19) and the impact member (133), so as to buffer the impact of the impact member (133) on the support member (19).

Description

Fastener Drivers

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 25, 2024 with application number 202410351434.X, and the Chinese patent application filed with the China Patent Office on March 25, 2024 with application number 202420587590.1. The entire contents of the above applications are incorporated by reference into this application. Technical Field

[0002] The present application relates to a handheld power tool, for example, to a fastener driver. Background Art

[0003] In actual production life, it is sometimes necessary to use nails to connect objects or fix objects. If manual hammering is used, it will lead to high labor intensity and low efficiency. Therefore, in the relevant technology, a nail gun is usually used to implement the nailing action. As a fastener driver, a nail gun is used to quickly drive nails into the work surface. A compressed air-driven nail gun has a compressed air-driven cylinder, and the thrust generated by the extension of the cylinder piston rod acts on the impact piece as a driving force to drive the nail into the work surface. A mechanical spring nail gun has an impact spring (compression spring). After the impact spring is compressed, the restoring force of the spring is used to act on the impact piece as a driving force to drive the nail into the work surface.

[0004] As the requirements for nailing efficiency and nailing force continue to increase, the performance requirements for nail guns during the impact process are also getting higher and higher. The safety and service life of components must be guaranteed during the efficient nailing process.

[0005] This section provides background information related to the present application which is not necessarily prior art. Summary of the Invention

[0006] An object of the present application is to solve or at least alleviate some or all of the above problems.

[0007] To achieve this goal, this application adopts the following technical solutions:

[0008] A fastener driver comprises: a striking assembly including a striking piece for driving a fastener; a driving mechanism including an impact piece for driving the impact piece and an energy storage assembly for impacting the impact piece when releasing energy; a motor configured to drive the driving mechanism; and a support member disposed at the front end of the impact piece near the impact piece in the impact direction; wherein, when the impact piece is impacted to the front end, a buffer space is formed between the support member and the impact piece to buffer the impact of the impact piece on the support member.

[0009] In some embodiments, the support member is formed with a receiving cavity, which can receive part of the impact member when the impact member impacts forward to the front end, so as to form a buffer space.

[0010] In some embodiments, at least one buffer member is disposed between the support member and the impact member.

[0011] In some embodiments, the buffer comprises a soft rubber pad.

[0012] In some embodiments, the buffer comprises a soft rubber pad and / or a hard rubber pad.

[0013] In some embodiments, the energy storage assembly includes a guide rod and a spring sleeved on the guide rod, and one end of the spring is fixed to the impact member.

[0014] In some embodiments, it also includes: a driving component, the driving component is configured to drive the energy storage component to store energy; the driving component includes a driving component that drives the impact component; when the motor is stopped, the driving component and the impact component are abutted, and the angle α between the direction of the line from the force point of the driving component to the rotation axis of the driving component and the impact direction is greater than 0° and less than or equal to 30°.

[0015] In some embodiments, the angle α is 15°.

[0016] In some embodiments, the driving member is provided with a first driving portion and a second driving portion; the impact member is formed with a first lifting surface capable of contacting the first driving portion and a second lifting surface contacting the second driving portion; the first lifting surface and / or the second lifting surface is not perpendicular to the impact direction.

[0017] In some embodiments, the energy storage assembly includes a guide rod and a spring sleeved on the guide rod; the impact piece at least partially extends into the spring.

[0018] In some embodiments, the energy storage assembly includes a guide rod and a spring sleeved on the guide rod, the impact piece forms a first accommodating groove, and one end of the spring is connected to the first accommodating groove.

[0019] In some embodiments, the energy storage assembly includes a guide rod and a spring sleeved on the guide rod; one end of the spring is fixed to the impact piece.

[0020] In some embodiments, the spring itself defines an elastic constant K greater than or equal to 6 and less than or equal to 8.

[0021] In some embodiments, one end of the spring is fixed to the impact member by welding.

[0022] In some embodiments, the impact piece is provided with an internal thread; one end of the spring is connected to the internal thread of the impact piece.

[0023] In some embodiments, the impact member extends at least partially into the spring.

[0024] In some embodiments, the impact member forms a first receiving groove, and one end of the spring is connected to the first receiving groove.

[0025] In some embodiments, the driving member is provided with a first driving portion and a second driving portion; the impact member is formed with a first lifting surface capable of contacting the first driving portion and a second lifting surface contacting the second driving portion; the first lifting surface and / or the second lifting surface is not perpendicular to the impact direction.

[0026] In some embodiments, the other end of the spring is connected to an adjusting member, and the adjusting member is used to adjust the pre-compression degree of the spring to adjust the striking force of the fastener driver.

[0027] In some embodiments, the fastener driver weighs less than or equal to 2 kg.

[0028] In some embodiments, the fastener driver has a nailing efficiency greater than or equal to 80 nails / W·h.

[0029] A fastener driver comprises: a striking assembly including a striking piece for driving a fastener; a driving mechanism including an impact piece for driving the impact piece and an energy storage assembly for impacting the impact piece when releasing energy; a motor configured to drive the driving mechanism; and a support member disposed at the front end of the impact piece near the impact piece in the impact direction; wherein, when the impact piece is impacted to the front end, the front end portion of the impact piece compresses gas to absorb the impact force.

[0030] A fastener driver comprises: a striking assembly including a striking piece for driving a fastener; a driving mechanism including an impact piece for driving the striking piece and an energy storage assembly for impacting the impact piece when releasing energy; a motor configured to drive the driving mechanism; a support member disposed at the front end of the striking piece near the striking piece in the impact direction; the support member being formed with a receiving cavity, and when the striking piece is impacted to the front end, the front end of the striking piece compresses the gas in the receiving cavity to absorb the impact force.

[0031] In some embodiments, at least one buffer member is disposed between the support member and the impact member.

[0032] In some embodiments, the buffer comprises a soft rubber pad.

[0033] In some embodiments, the buffer comprises a soft rubber pad and / or a hard rubber pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG1 is a schematic diagram of a fastener driver;

[0035] FIG2 is a diagram of the internal structure of a fastener driver;

[0036] FIG3 is a cross-sectional view of a fastener driver;

[0037] FIG4 is a cross-sectional view of the drive mechanism and the energy storage assembly;

[0038] FIG5 is a schematic diagram of an impact member in a fastener driver at the bottom dead center;

[0039] FIG6 is a cross-sectional view of an impact member of a fastener driver at the bottom dead center;

[0040] FIG7 is a schematic diagram of the cooperation between the driving member and the impact member in FIG6;

[0041] FIG8 is an AA view in FIG7;

[0042] Figure 9 is a schematic diagram of the impact member at the top dead center;

[0043] FIG10 is a schematic diagram of the cooperation between the driving member and the impact member in FIG9;

[0044] FIG11 is a BB view in FIG10;

[0045] FIG12 is a top view of a driving member in a fastener driver;

[0046] FIG13 is a schematic diagram of an impact member in a fastener driver;

[0047] FIG14 is a schematic diagram of an energy storage assembly and a buffer member in a fastener driver;

[0048] FIG15 is a cross-sectional view of a fastener driver in which a spring and an impact member are integrated;

[0049] FIG. 16 is a schematic diagram of a drive mechanism and energy storage assembly in a fastener driver. DETAILED DESCRIPTION

[0050] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0051] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0052] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0053] In this application, the terms "connect," "combine," "couple," and "install" may 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 an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0054] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0055] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0056] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0057] In this application, the terms "device", "module" or "unit" can be implemented in the form of hardware or software to achieve specific functions.

[0058] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0059] In order to clearly illustrate the technical solution of the present application, the upper side, lower side, front side and rear side are also defined as shown in FIG1 .

[0060] FIG1 shows a fastener driver 100 according to one embodiment of the present application. The fastener driver 100 is used to drive a fastener into a work surface 200. For example, the fastener may be a nail, which may be a straight nail or a U-shaped staple. The fastener driver 100 quickly drives the fastener into the work surface 200, thereby securing the work surface 200 to a platform on the back of the work surface. Alternatively, the fastener driver can quickly drive the fastener into two objects to achieve a connection between the two objects.

[0061] The fastener driver 100 is, for example, a nail gun. Optionally, the fastener driver 100 comprises a mechanical spring-type nail gun that utilizes the force of a compressed coil spring as an impact force (e.g., a driving force). Optionally, the fastener driver 100 is a cylinder-type nail gun that compresses the gas in the cylinder, which pushes the firing assembly 23 out and performs the nailing action. In this embodiment, the fastener driver 100 is a mechanical spring-type nail gun that utilizes the elastic force of the compressed coil spring as an impact force (e.g., a driving force).

[0062] The fastener driver 100 includes a power supply. In this embodiment, the power supply is a DC power supply. In this embodiment, the DC power supply is a rechargeable battery pack 300, and the battery pack 300 cooperates with the corresponding power supply circuit to power the fastener driver 100. Those skilled in the art should understand that in other embodiments, the fastener driver 100 can also be powered by other power supply devices. For example, the power supply can be an AC line connected to the mains, or the power supply can also be other connecting cables that can be connected to a power supply device. The mains or other power supply devices cooperate with the corresponding rectification, filtering and voltage regulation circuits to realize power supply to the corresponding components of the fastener driver 100. The battery pack 300 will be used to replace the power supply below, but it cannot be used as a limitation of this application.

[0063] Among them, the battery pack 300 may be a lithium battery pack, a solid-state battery pack or a soft-pack battery pack. In some embodiments, when the power supply includes multiple battery packs 300, the types of battery packs 300 may be the same or different. In some embodiments, the electrical parameters, structural parameters and physical parameters of multiple battery packs 300 may be the same or different. In some embodiments, the nominal voltage of the battery pack 300 is greater than or equal to 10V and less than or equal to 80V. For example, the nominal voltage of the battery pack 300 is 10.8V, 24V, 36V, 48V, 56V or 80V. The nominal voltage generally refers to the voltage specified by the manufacturer or seller on the label, packaging, user manual, instruction manual, advertisement, marketing or other supporting documents of these products so that users can understand which power tools 200a and battery packs can operate with each other. Alternatively, the nominal voltage of the battery pack 100 can also be obtained by detection or calculation,

[0064] As shown in Figures 1 to 3, the fastener driver 100 includes a housing 11, a striking assembly 12, a drive mechanism 13, and a motor. The housing 11 is used to support the striking assembly 12, the drive mechanism 13, and the motor. The striking assembly 12 includes a striking member 121 for driving the fastener. Optionally, the striking member 121 is used to drive the fastener along a striking line 101 and into a working surface 200. Optionally, the striking member 121 is a sheet-like element extending along a plane parallel to the striking line 101. The drive mechanism 13 is used to drive the striking member 121 to move along the striking line 101, thereby impacting the fastener along the striking line 101 and into the working surface 200.

[0065] In order to facilitate the description of the technical solution of the present application, the front-to-back direction and the up-to-down direction are defined as shown in Figure 1, wherein the front-to-back direction is parallel to the striking line 101, the direction from the striking member 121 to the fastener is the front, and the up-to-down direction is perpendicular to the front-to-back direction.

[0066] As shown in Figures 2 and 3, in this embodiment, a motor is disposed in the housing 11, and the motor is used to provide power to the drive mechanism 13. In this embodiment, the motor is specifically an electric motor 14, and the drive mechanism 13 is provided with power by the electric motor 14. It is understandable that in other embodiments, the motor can also be other forms of power sources, such as an engine. In this application, for the convenience of explanation, the electric motor 14 is used for explanation. The electric motor 14 is an inner rotor motor, which includes a stator assembly 141 and a rotor assembly 142. The rotor assembly 142 includes a motor shaft 143 for outputting power, and the stator assembly 141 surrounds the motor shaft 143. The motor shaft 143 can rotate around the motor axis 104 relative to the housing 11 to output power. It is understandable that in other embodiments, the electric motor 14 can also be an outer rotor motor, and no excessive restrictions are made here.

[0067] As shown in FIG1 , a battery pack 300 is mounted to the housing 11. The battery pack 300 is used to power the fastener driver 100. When mounted to the housing 11, the battery pack 300 can at least power the motor 14 to operate. It will be appreciated that in other embodiments, the fastener driver 100 can also be powered by other power supply devices. For example, the power supply device can be an AC power cord connected to a mains power source, or the power supply device can be another connecting cable that can be connected to a power supply device. The battery pack 300 is removably mounted to the housing 11. When mounted to the housing 11, the battery pack 300 can at least power the motor 14 to operate.

[0068] As shown in Figures 2 to 4, the drive mechanism 13 includes a drive assembly 131, an energy storage assembly 132, and an impact member 133. The drive assembly 131 is used to drive the energy storage assembly 132 to store energy. The impact member 133 is connected to the striking member 121. The impact member 133 is configured to move relative to the housing 11 along the first straight line 102 and, when moving along the first straight line 102, drives the striking member 121 to move along the striking straight line 101. The energy storage assembly 132 stores energy for driving the impact member 133 to move, and when releasing the energy, drives the impact member 133 to move along the first straight line 102, thereby driving the striking member 121 to move along the striking straight line 101.

[0069] As shown in FIG. 1 and FIG. 2 , the fastener driver 100 further includes a magazine 1161 disposed at the front end of the housing 11 . The magazine 1161 is used to accommodate fasteners. The magazine 1161 can push the fasteners one by one to the nailing position, thereby achieving continuous nailing.

[0070] As shown in Figure 1, the housing 11 includes a main body 111, a motor housing 112, and a handle 113. The motor housing 112 and the handle 113 extend downward from the lower portion of the main body 111. The motor housing 112 is located at the front, and the handle 113 is located at the rear, extending approximately parallel to each other. The main body 111 defines a first accommodating cavity for accommodating at least a portion of the energy storage assembly 132. The motor housing 112 houses a motor 14 serving as a drive source. The handle 113 is configured for a user to grasp to operate the fastener driver 100. The fastener driver 100 also includes a trigger 1131 mounted to the handle 113. When the user grasps the handle 113, the trigger 1131 can be activated. The trigger 1131 is configured for the user to actuate the fastener driver 100 and further includes an operating surface 1132 for user operation. When the user holds the handle 113, the user can contact the operating surface 1132 with a finger to pull the trigger 1131. The operating surface 1132 is the front surface of the trigger 1131. In this embodiment, the operating surface 1132 is an arc-shaped surface that fits the user's finger.

[0071] As shown in FIG1 , a through hole 114 for the user's hand to pass through is formed between the motor housing portion 112 and the handle portion 113. In some embodiments, the main body 111 connects the handle portion 113 and the motor housing portion 112 at the upper side of the handle portion 113 and the motor housing portion 112, and the coupling portion 115 connects the handle portion 113 and the motor housing portion 112 at the lower side of the handle portion 113 and the motor housing portion 112. In this way, the main body 111, the motor housing portion 112, the coupling portion 115, and the handle portion 113 are sequentially connected to surround and form the above-mentioned through hole 114. It is understandable that in other embodiments, the coupling portion 115 may not connect the handle portion 113 and the motor housing portion 112. In this way, the through hole 114 is the area between the handle portion 113 and the motor housing portion 112. The through hole 114 passes through the housing 11 in the left-right direction perpendicular to the first straight line 102. When the user holds the handle 113 , the user's fingers can be at least partially located in the through hole 114 , or the fingers can pass through the through hole 114 , so that the user's palm and fingers can surround the handle 113 to grip the handle 113 . The trigger 1131 is also provided in the region of the through hole 114 .

[0072] As shown in Figure 1, the housing 11 further includes a coupling portion 115 for coupling the battery pack 300. The battery pack 300 is removably mounted to the coupling portion 115. The coupling portion 115 spans between the motor housing 112 and the distal end of the handle portion 113. Optionally, the coupling portion 115 is disposed at the end of the handle portion 113 away from the main body 111. The battery pack 300 can be mounted to the coupling portion 115 in a direction parallel to the first straight line 102.

[0073] As shown in Figures 2 and 3, the housing 11 further includes a connecting portion 116 for mounting a magazine 1161, which is at least partially disposed within the connecting portion 116. In this embodiment, the connecting portion 116 extends generally in the vertical direction, that is, generally along a third straight line 106 perpendicular to the first straight line 102. In some embodiments, the connecting portion 116 extends downward from the lower portion of the main body 111. The connecting portion 116 and the handle portion 113 are spaced apart and extend generally parallel to each other. The connecting portion 116 is located in front of the motor housing 112.

[0074] As shown in Figures 2 to 4, fastener driver 100 further includes a reduction mechanism 15 disposed between motor 14 and drive mechanism 13. Reduction mechanism 15 connects motor 14 and drive mechanism 13, thereby transmitting power output by motor 14 to drive mechanism 13. Reduction mechanism 15 also reduces the rotational speed of motor 14 for output. Reduction mechanism 15 is at least partially disposed within motor housing 112.

[0075] As shown in FIG3 , the reduction mechanism 15 includes a first reduction assembly 151 and a first transmission assembly 152. The first reduction assembly 151 is connected to the motor 14 and disposed within the motor housing 112. The first transmission assembly 152 is connected to the drive assembly 131 to drive the drive assembly 131 to move. The first transmission assembly 152 is disposed within the motor housing 112. In this case, it can be considered that a portion of the first reduction assembly 151 is located within the motor housing 112 and a portion is located within the main body 111. Alternatively, it can be considered that the first reduction assembly 151 is substantially located within the main body 111.

[0076] As shown in FIG4 , the first reduction gear assembly 151 optionally includes a first sun gear 1511 formed on or connected to the motor shaft 143 and a planetary gear set 1512 for speed reduction. The number of planetary gear sets 1512 can be one or multiple. Planetary gear set 1512 converts the output speed of the motor 14 according to a certain transmission ratio, outputting the appropriate torque and speed through an output shaft 1521 to achieve the appropriate torque. The output shaft 1521 rotates about the rotation axis 105. In this embodiment, the motor axis 104 and the rotation axis 105 are coaxial. In other embodiments, the motor axis 104 and the rotation axis 105 can also be arranged parallel but not coaxial, or at an angle to the rotation axis 105, without further limitation. Because the speed reduction operating principle of the planetary gear set 1512 and the principle of speed reduction generated by this transmission mechanism are well known to those skilled in the art, a detailed description is omitted here for the sake of brevity.

[0077] As shown in FIG4 , fastener driver 100 further includes a shaft lock assembly 16 that transmits power to output shaft 1521. This assembly allows power to be transmitted from motor 14 to output shaft 1521, while preventing reverse transmission of power from output shaft 1521 back to motor 14. The structure of shaft lock assembly 16 is relatively common and will not be described in detail here.

[0078] The first transmission assembly 152 is connected to the drive assembly 131 to drive the drive assembly 131. The first transmission assembly 152 does not have a deceleration and torque-increasing effect. The output shaft 1521 of the first transmission assembly 152 is coaxial with the output shaft of the first reduction assembly 151. In other embodiments, the output shaft 1521 of the first transmission assembly 152 and the output shaft of the first reduction assembly 151 may be non-coaxial but parallel, or may be arranged at a certain angle, without further limitation.

[0079] As shown in Figure 5, the energy storage assembly 132 includes a guide rod 1321 and a spring 1322. The guide rod 1321 extends along the central axis 103. The spring 1322 is mounted on the guide rod 1321 and extends along the central axis 103 of the guide rod 1321. The spring 1322 stores energy when compressed and releases energy when extended. The released energy drives the impact member 133. In some embodiments, the reduction mechanism 15, when driven by the motor 14, drives the impact member 133 backward, causing the impact member 133 to compress the spring 1322, thereby storing energy in the spring 1322. For example, the spring 1322 is also centered about the central axis 103 of the guide rod 1321. That is, the spring 1322 extends along the central axis 103, and the direction of extension or compression of the spring 1322 is aligned with the central axis 103. It will be appreciated that in this embodiment, the central axis 103 coincides with the first straight line 102. It is understood that in other embodiments, the central axis 103 may be parallel to the first straight line 102. In this embodiment, the spring 1322 is sleeved on the guide rod 1321. It is understood that in other embodiments, the spring 1322 may be disposed within a guide cylinder that circumferentially surrounds the spring 1322, thereby eliminating the need for the guide rod 1321.

[0080] As shown in Figures 3 and 4, the guide rod 1321 and the spring 1322 are both disposed within the main body 111. The fastener driver 100 further includes a support member 19, which is used to at least limit the rotation of the guide rod 1321. The support member 19 is disposed within the main body 111 and is positioned at the front end of the impact member 133 near the striking member 121 in the impact direction. In some embodiments, the support member 19 is a separate component from the housing 11 and is secured to the housing 11 via a connector. It will be appreciated that in other embodiments, the support member 19 may be integrally formed with the housing 11.

[0081] The driving assembly 131 includes a driving member 1311 for driving the impact member 133 to move backward to compress the spring 1322, and the driving member 1311 is mounted to the output shaft 1521. The driving member 1311 is formed with a mounting hole, and the output shaft 1521 passes through the mounting hole. The driving member 1311 can also be divided into two parts, one part is connected to the output shaft 1521, and the other part is used to realize the function of driving the spring 1322. In this embodiment, the driving member 1311 includes at least one structure of a cam or a crank, so that the driving member forms an eccentric structure. When the driving member 1311 rotates along the axis of the output shaft 1521, the driving impact member moves axially. Optionally, the driving member 1311 includes a driving protrusion that contacts the impact member 133.

[0082] As shown in Figures 5 and 6, impact member 133 is located at the bottom dead center position, where it impacts striking member 121 and moves to its forwardmost position. As shown in Figure 9, impact member 133 is located at the top dead center position, where it compresses spring 1322 to its shortest position. When impact member 133 is at the bottom dead center position, spring 1322 is at its longest position and releases energy. When impact member 133 is at the top dead center position, spring 1322 is compressed by impact member 133 to its shortest position and accumulates energy.

[0083] When the user issues an instruction to start the motor 14, the motor 14 starts and transmits power to the reduction mechanism 15. The reduction mechanism 15 drives the drive assembly 131 to move. The output shaft 1521 drives the driving member 1311 to rotate, causing the position of the driving protrusion to change, and the driving protrusion to contact the impact member 133. The change in the position of the driving protrusion drives the impact member 133 backward along the first straight line 102. The impact member 133 reaches the top dead center and compresses the spring 1322, which accumulates energy. When the driving member 1311 continues to rotate, the driving protrusion rotates a certain angle and then disengages from the impact member 133, thus releasing the drive of the impact member 133. The spring 1322 releases energy and drives the impact member 133 forward to the bottom dead center. At this time, the spring 1322 quickly releases energy, driving the impact member 133 forward quickly to drive the fastener into the working surface 200. At this point, the fastener driver 100 completes one nailing process.

[0084] During the nailing process, the impact piece 133 will collide with the support piece 19. The continuous impact will affect the service life of the impact piece 133 and the support piece 19. In some working conditions where the nailing force is relatively high, the impact force between the impact piece 133 and the support piece 19 will be transmitted to the user's hand through the shell, resulting in a strong vibration feeling when the user uses it, affecting the user's usage time and even physical health. In order to solve the above problems, as shown in Figures 4 to 6, when the impact piece 133 is impacted to the front end, a buffer space 17 is formed between the support piece 19 and the impact piece 133 to buffer the impact of the impact piece 133 on the support piece 19. In some embodiments, when the impact piece 133 is impacted to the front end, the front end of the impact piece 133 compresses the gas to absorb the impact force. In some embodiments, the support piece 19 is formed with a accommodating cavity. When the impact piece 133 is impacted to the front end, the front end of the impact piece 133 compresses the gas in the accommodating cavity to absorb the impact force. When the impact member 133 is impacted to the front end, the front end portion 1335 of the impact member 133 enters the accommodating cavity, forming a buffer space 17, which contains air or gas. When the front end portion 1335 of the impact member 133 enters the accommodating cavity, the gas in the buffer space 17 is compressed, which acts as a buffer. By providing a buffer space 17 containing gas between the support member 19 and the impact member 133, the impact force during the nailing process is absorbed by compressed gas without increasing the number of components, changing the original assembly process, or changing the assembly difficulty, so that the impact member 133 does not hard impact the support member 19, thereby extending the service life of the component and preventing the user from being damaged by vibration during use.

[0085] To further enhance the cushioning effect, a cushion is provided on the front end 1335 of the impact member 133. When the impact member 133 is impacted to the front end, the cushion abuts against the rear end of the support member 19, absorbing the impact force exerted by the impact member 133 on the support member 19, thereby further providing a cushioning effect. Optionally, the cushion can be made of rubber or silicone, preferably a soft rubber material with a certain hardness, which can both absorb the impact force and support the impact member.

[0086] As shown in FIG4 , in some embodiments, at least one buffer member 18 is disposed between the support member 19 and the impact member 133. The buffer member 18 is disposed on the outer periphery of the guide rod 1321. When the impact member 133 is impacted to its front end, it collides with the buffer member 18, causing the buffer member 18 to elastically deform and provide a cushioning effect. The number of buffer members 18 can be arranged according to actual needs, and the number of buffer members 18 can be 1, 2, 3, 4, 5, or more, without further limitation.

[0087] In some embodiments, the buffer member 18 includes a soft rubber pad 182. The soft rubber pad 182 is used as the buffer member 18. The soft rubber pad 182 is easy to deform after being impacted. When impacted by the impact member 133, it can deform quickly to play a buffering role.

[0088] As shown in Figure 14, the cushioning member 18 includes a soft rubber pad 182 and / or a hard rubber pad 181. The soft rubber pad 182 or the hard rubber pad 181 can be used alone, or both can be used together. While the hard rubber pad 181 can absorb the impact force of the impact member 133, due to its larger deformation coefficient, the cushioning effect is limited and the impact member 133 is more likely to rebound. Therefore, in some embodiments, the combined use of the soft rubber pad 182 and the hard rubber pad 181 can effectively improve the cushioning effect.

[0089] As shown in Figures 8 and 11, the driving protrusion is arranged eccentrically relative to the rotation axis 105 of the output shaft 1521. In other words, the driving protrusion is not an element centered on the rotation axis 105. As a result, when the driving member 1311 rotates about the rotation axis 105, the driving protrusion changes position. In some embodiments, the driving protrusion of the driving member 1311 includes a first driving portion 1312 and a second driving portion 1313; the impact member 133 is formed with a first lifting surface 1332 capable of contacting the first driving portion 1312 and a second lifting surface 1334 capable of contacting the second driving portion 1313; the first lifting surface 1332 and / or the second lifting surface 1334 are not perpendicular to the impact direction. The impact member 133 is driven by the driving member 1311 to move from the bottom dead center position to the top dead center position. The first driving portion 1312 cooperates with the first lifting portion 1331 of the impact member 133 to drive the impact member 133 rearward. The first lifting portion 1331 includes a first lifting surface 1332 that contacts the first driving portion 1312. The second driving portion 1313 cooperates with the second lifting portion 1333 of the impact member 133 to also drive the impact member 133 rearward. The second lifting portion 1333 includes a second lifting surface 1334 that contacts the second driving portion 1313. During the rearward movement of the impact member 133, the first driving portion 1312 first cooperates with the first lifting surface 1332 to drive the impact member 133 rearward from the bottom dead center a certain distance to the first stroke position. After that, the second driving portion 1313 cooperates with the second lifting surface 1334 to drive the impact member 133 to continue to move rearward from the first stroke position until it reaches the top dead center.

[0090] In some embodiments, the distance between the first driving portion 1312 and the rotation axis 105 is the same as the distance between the second driving portion 1313 and the rotation axis 105. The first driving portion 1312 and the second driving portion 1313 are cylindrical bodies with substantially the same diameter. Thus, when the driving member 1311 rotates about the rotation axis 105, the first driving portion 1312 and the second driving portion 1313 also orbit around the rotation axis 105. As the first driving portion 1312 and the second driving portion 1313 rotate about the rotation axis 105, they contact the first lifting portion 1331 and the second lifting portion 1333, respectively, to drive the impact member 133 backward along the first straight line 102, completing the movement from the bottom dead center to the top dead center. As shown in FIG. 16 , in some embodiments, the first driving portion 1312 and the second driving portion 1313 are cylindrical bodies with different heights. For example, the height of the first driving portion 1312 is less than the height of the second driving portion 1313.

[0091] In some embodiments, fastener driver 100 further includes a sensor for detecting the position of impact member 133 or driving member 1311 to determine the correspondence between impact member 133 and the top dead center position. When the sensor detects that impact member 133 has reached top dead center, the controller controls motor 14 to stop, placing fastener driver 100 in a standby state. The sensor can be a photoelectric sensor, a position sensor, a collision sensor, or the like, and is not intended to be limiting herein.

[0092] As shown in Figure 12, in some embodiments, when the motor is stopped, the driver 1311 abuts the impact member 133, and the angle α between the direction of the impact and the line connecting the force point F of the driver 1311 to the rotational axis of the driver 1311 is greater than 0° and less than or equal to 30°. When the motor is stopped, the second driving portion 1313 abuts the second lifting surface 1334, and the angle α between the direction of the impact and the force point F to the axis of the driver 1311 can be 1°, 2°, 3°, ... 25°, 26°, 27°, ... 30°. When the stop position is within the above range, the starting torque for the next start is minimized, enabling fast nailing and ensuring efficient nailing. Furthermore, if the user does not use the fastener driver 100 for an extended period of time, maintaining this position minimizes the torque applied to the shaft lock assembly 16 and the first transmission assembly 152, thereby protecting the fastener driver 100.

[0093] In some embodiments, optionally, when the motor is stopped, the driving member 1311 abuts against the impact member 133, and the angle α between the direction of the line from the force point F of the driving member 1311 to the rotation axis of the driving member 1311 and the impact direction is 15°.

[0094] During the nailing process of the fastener driver 100, the impact member 133 can drive the striking member 121 at its front end to strike the fastener. When the striking member 121 collides with the nail, energy loss will occur, resulting in a reduction in striking force, and ultimately a decrease in nailing efficiency.

[0095] As shown in FIG15 , in some embodiments, the energy storage assembly 132 includes a guide rod 1321 and a spring 1322 mounted on the guide rod 1321, with one end of the spring 1322 fixed to the impact member 133. Because one end of the spring 1322 is fixed to the impact member 133, part of the inertial mass of the spring 1322 is added to the impact member 133, thereby increasing the mass of the impact member 133. The increase in the inertial mass of the impact member 133 means less collision energy loss. Without attenuating the speed of the impact member 133, the energy loss at the moment of collision between the striking member 121 and the fastener is reduced, thereby increasing the striking force and ensuring the nailing effect and efficiency. Among them, one end of the spring 1322 is fixed to the impact piece 133, including one end of the spring 1322 is fixedly connected to the impact piece 133, or one end of the spring 1322 is non-detachably connected to the impact piece 133, or one end of the spring 1322 is connected to the impact piece 133 and always moves synchronously, or one end of the spring 1322 is connected to the impact piece 133 and there is basically no loss in the force transmission between the two or the loss is less than a preset value.

[0096] In this embodiment, the spring 1322 itself defines a spring constant K, which in this embodiment is greater than or equal to 6 and less than or equal to 8. In some embodiments, the spring constant K is greater than or equal to 6.3 and less than or equal to 7.8. In some embodiments, the spring constant K is greater than or equal to 6.5 and less than or equal to 7.5. In some embodiments, the spring constant K is greater than or equal to 6.5 and less than or equal to 7.

[0097] In some embodiments, one end of the spring 1322 is fixed to the impact piece 133 by welding. The welding connection ensures that the spring 1322 and the impact piece 133 are stably connected, and prevents relative movement between the spring 1322 and the impact piece 133 during the nailing process.

[0098] In some embodiments, the impact member 133 is provided with an internal thread; one end of the spring 1322 is connected to the internal thread of the impact member 133. By processing the internal thread on the impact member 133, when installing the spring 1322 on the impact member 133, only one end of the spring 1322 needs to be screwed into the impact member 133, which reduces the difficulty of installation.

[0099] In some embodiments, the impact member 133 at least partially extends into the spring 1322. By fixing one end of the spring 1322 on the impact member 133, the connection between the impact member 133 and the spring 1322 is facilitated.

[0100] In some embodiments, the impact member 133 forms a first receiving groove, and one end of the spring 1322 is connected to the first receiving groove. By providing the first receiving groove, the portion where the spring 1322 is connected to the impact member 133 can be accommodated, thereby improving the compactness of the structure.

[0101] As shown in Figures 5, 9, and 16, in some embodiments, the other end of spring 1322 is connected to an adjusting member 1323. Adjusting member 1323 is used to adjust the pre-compression of spring 1322 to adjust the impact force of fastener driver 100. Adjusting member 1323 is disposed at the rear end of guide rod 1321. The front end of spring 1322 is connected to impact member 133, while the rear end of spring 1322 abuts against adjusting member 1323. Adjusting member 1323 is rotatable relative to guide rod 1321. For example, adjusting member 1323 may be threadedly connected to guide rod 1321. When adjusting member 1323 is operated, it moves forward and backward relative to guide rod 1321, thereby adjusting the tension of spring 1322 and, thereby, adjusting the impact force of fastener driver 100. During use, the operator can make adjustments based on actual needs to meet the requirements of different occasions.

[0102] In some embodiments, the weight of the fastener driver 100 is less than or equal to 2 kg. In some embodiments, the weight of the fastener driver 100 is less than or equal to 1.8 kg. In some embodiments, the weight of the fastener driver 100 is less than or equal to 1.6 kg. In some embodiments, the weight of the fastener driver 100 is less than or equal to 1.4 kg. By limiting the weight of the fastener driver 100 to 1.4 kg, it is possible to ensure that the fastener driver 100 is relatively light when used, reducing the labor intensity of the operator when using it. It should be explained that in products provided with a battery pack for power supply, the weight of the fastener driver 100 includes the weight of the battery pack.

[0103] In some embodiments, the fastener driver 100 has a nailing efficiency greater than or equal to 70 nails / W·h. In some embodiments, the fastener driver 100 has a nailing efficiency greater than or equal to 75 nails / W·h. In some embodiments, the fastener driver 100 has a nailing efficiency greater than or equal to 80 nails / W·h. In some embodiments, the fastener driver 100 has a nailing efficiency greater than or equal to 85 nails / W·h. The nailing efficiency of the fastener driver 100 refers to the average number of nails driven per watt-hour of electricity consumed during a nailing operation in a laboratory environment.

[0104] As shown in Figure 2, in some embodiments, the fastener driver 100 further includes a fan 144, which is fixedly connected to the motor shaft 143 and can rotate synchronously with the motor shaft 143. The fan 144 is mounted to the upper end of the motor shaft 143. When the fan 144 rotates, it generates a heat dissipation airflow from the outside, which flows into the housing 11 and then flows out of the housing 11. A circuit board assembly 301 is also disposed within the joint 115. The circuit board assembly 301 is electrically connected to the motor 14 to control the operation of the motor 14. The housing 11 is formed with an air inlet and an air outlet. The air inlet corresponds to the position of the fan 144, and the air outlet corresponds to the position of the circuit board assembly 301. In this embodiment, a high-power capacitor is disposed on the circuit board assembly 301. The air outlet also corresponds to the position of the capacitor. When the fan 144 rotates, the heat dissipation airflow enters the housing 11 through the air inlet, flows through the circuit board assembly 301, and then flows out through the air outlet.

[0105] The circuit board assembly 301 is disposed within the coupling portion 115 , and the capacitor is disposed on the upper side of the circuit board assembly 301 . Electrical connection terminals are disposed on the lower side of the circuit board assembly 301 , and are used to electrically connect to the battery pack 300 , so that the battery pack 300 supplies power to the motor 14 .

[0106] In some embodiments, a partition for separating the motor 14 and the circuit board assembly 301 may be further provided at the joint 115 , so that heat generated during operation of the motor 14 will not enter the circuit board assembly 301 .

[0107] The above shows and describes 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 form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of this application.

Claims

1. A fastener driver (100), comprising: a striking assembly (12) comprising a striking member (121) for driving a fastener; A driving mechanism (13) includes an impact member (133) for driving the striking member (121) and an energy storage component (132) for impacting the impact member (133) when releasing energy; a motor configured to drive the driving mechanism (13); A support member (19) is provided at a front end of the impact member (133) close to the striking member (121) in the impact direction; wherein, when the impact member (133) is impacted to the front end, a buffer space (17) is formed between the support member (19) and the impact member (133) to buffer the impact of the impact member (133) on the support member (19).

2. The fastener driver of claim 1, wherein: The support member (19) is formed with a receiving cavity, which can receive a portion of the impact member (133) when the impact member (133) impacts forward to the front end, thereby forming the buffer space (17).

3. The fastener driver of claim 1 , wherein: At least one buffer member (18) is provided between the support member (19) and the impact member (133).

4. The fastener driver of claim 3, wherein: The buffer member (18) includes a soft rubber pad (182).

5. The fastener driver of claim 3, wherein: The buffer member (18) includes a soft rubber pad (182) and / or a hard rubber pad (181).

6. The fastener driver of claim 1 , wherein: The energy storage assembly (132) comprises a guide rod (1321) and a spring (1322) sleeved on the guide rod (1321), and one end of the spring (1322) is fixed to the impact member (133).

7. The fastener driver of claim 1 , further comprising: A drive assembly (131), wherein the drive assembly (131) is configured to drive the energy storage assembly (132) to store energy; the drive assembly (131) comprises a drive member (1311) for driving the impact member (133); when the motor is stopped, the drive member (1311) abuts against the impact member (133), and an angle α between a direction of a line from a force point of the drive member (1311) to a rotation axis of the drive member (1311) and the impact direction is greater than 0° and less than or equal to 30°.

8. The fastener driver of claim 7, wherein: The angle α is 15°.

9. The fastener driver of claim 7, wherein: The driving member (1311) is provided with a first driving portion (1312) and a second driving portion (1313); the impact member (133) is formed with a first lifting surface (1332) capable of contacting the first driving portion (1312) and a second lifting surface (1334) in contact with the second driving portion (1313); the first lifting surface (1332) and / or the second lifting surface (1334) are not perpendicular to the impact direction.

10. The fastener driver of claim 1, wherein: The energy storage assembly (132) comprises a guide rod (1321) and a spring (1322) sleeved on the guide rod (1321); the impact member (133) at least partially extends into the spring (1322).

11. The fastener driver of claim 1 , wherein: The energy storage assembly (132) includes a guide rod (1321) and a spring (1322) sleeved on the guide rod (1321); the impact member (133) forms a first accommodating groove; one end of the spring (1322) is connected to the first accommodating groove.

12. The fastener driver of claim 1, wherein: The energy storage assembly (132) comprises a guide rod (1321) and a spring (1322) sleeved on the guide rod (1321); one end of the spring (1322) is fixed to the impact member (133).

13. The fastener driver of claim 12, wherein: The elastic coefficient K defined by the spring (1322) itself is greater than or equal to 6 and less than or equal to 8.

14. The fastener driver of claim 12, wherein: One end of the spring (1322) is fixed to the impact member (133) by welding.

15. The fastener driver of claim 12, wherein: The impact piece (133) is provided with an internal thread; one end of the spring (1322) is connected to the internal thread of the impact piece (133).

16. A fastener driver (100), comprising: a striking assembly (12) comprising a striking member (121) for driving a fastener; A driving mechanism (13) includes an impact member (133) for driving the striking member (121) and an energy storage component (132) for impacting the impact member (133) when releasing energy; a motor configured to drive the driving mechanism (13); The support member (19) is arranged at the front end of the impact member (133) close to the striking member (121) in the impact direction; wherein, when the impact member (133) is impacted to the front end, the front end of the impact member (133) compresses gas to absorb the impact force.

17. A fastener driver (100), comprising: a striking assembly (12) comprising a striking member (121) for driving a fastener; A driving mechanism (13) includes an impact member (133) for driving the striking member (121) and an energy storage component (132) for impacting the impact member (133) when releasing energy; a motor configured to drive the driving mechanism (13); The support member (19) is arranged at the front end of the impact member (133) close to the striking member (121) in the impact direction; the support member (19) is formed with a receiving cavity, and when the impact member (133) is impacted to the front end, the front end of the impact member (133) compresses the gas in the receiving cavity to absorb the impact force.

18. The fastener driver of claim 17, wherein: At least one buffer member (18) is provided between the support member (19) and the impact member (133).

19. The fastener driver of claim 18, wherein: The buffer member (18) includes a soft rubber pad (182).

20. The fastener driver of claim 18, wherein The buffer member (18) includes a soft rubber pad (182) and / or a hard rubber pad (181).

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