Fastener driver

Abstract

The invention discloses a fastener driver, and the fastener driver comprises a striking assembly which comprises a striking part which is arranged to strike a fastener; the power mechanism comprises a gas spring mechanism for driving the striking piece; the air spring mechanism at least comprises an air cylinder assembly which comprises a first air cylinder, and the first air cylinder is communicated with the outside atmosphere under the condition that the striking piece is located at the stop position; the first piston is arranged in the first air cylinder, and the first piston is located at an initial position under the condition that the striking piece is located at the stop position; wherein one-time gas compression is completed under the condition that the first piston moves to the maximum compression position from the initial position, and when the first piston reaches the maximum compression position for the Nth time, the striking piece is released from the stopping position. According to the invention, higher nailing capability can be obtained.

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] As demands for nail-driving efficiency and force continue to increase, higher pressure is needed during the compressed air energy storage process to enable compressed air-driven nail guns to achieve greater nail-driving capabilities. However, due to the limited space within the housing of compressed air-driven nail guns, it is difficult for the cylinder, given its limited volume, to provide higher driving force to the piston.

[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 power mechanism includes a gas spring mechanism that drives the striking component;

[0010] The gas spring mechanism includes at least:

[0011] The cylinder assembly includes a first cylinder, which is connected to the outside atmosphere when the striking element is in the stopped position;

[0012] A first piston is disposed inside the first cylinder, and when the striking component is in the stopped position, the first piston is in the initial position.

[0013] Wherein, a gas compression is completed when the first piston moves from the initial position to the maximum compression position, and when the first piston reaches the maximum compression position for the Nth time, the striking element is released from the stop position, where N is greater than or equal to 2.

[0014] In some embodiments, a first valve is further included at the connection between the energy storage cylinder of the cylinder assembly and the first cylinder, allowing gas in the first cylinder to flow into the energy storage cylinder.

[0015] In some embodiments, a second valve is further included, disposed at the connection between the energy storage cylinder and the second cylinder of the cylinder assembly, allowing gas communication between the energy storage cylinder and the second cylinder.

[0016] In some embodiments, the power mechanism further includes a motor, wherein if the motor rotation parameter is greater than or equal to a parameter threshold, the second valve opens to allow compressed gas in the energy storage cylinder to enter the second cylinder and push the striking member to strike the fastener.

[0017] In some embodiments, the second valve is configured to open automatically when the air pressure in the energy storage cylinder is greater than or equal to a pressure threshold.

[0018] In some embodiments, a third valve is also included, disposed at the connection between the first cylinder and the second cylinder, allowing gas to flow from the second cylinder into the first cylinder.

[0019] In some embodiments, a fourth valve is also included, disposed on the second cylinder, which allows gas in the second cylinder to flow to the outside when the striking member is in the striking position.

[0020] In some embodiments, a transmission assembly is further included, which is connected to the power mechanism and the second valve respectively, and the power mechanism can control the second valve to open or close through the transmission assembly.

[0021] In some embodiments, the second valve opens when the first piston reaches the maximum compression position for the Nth time.

[0022] In some embodiments, the first cylinder is provided with an air inlet. When the striking member is in the stopped position, the first piston is in the initial position, and the air inlet connects the first cylinder to the outside.

[0023] A fastener driver, comprising:

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

[0025] The power mechanism includes a gas spring mechanism that drives the striking component;

[0026] The gas spring mechanism includes at least:

[0027] The cylinder assembly includes a first cylinder, which is connected to the outside atmosphere when the striking element is in the stopped position;

[0028] An energy storage cylinder is unidirectionally connected to the first cylinder and is configured to store compressed gas.

[0029] The second cylinder is at least connected to the energy storage cylinder, and the second cylinder has the impact member built in it. The impact member strikes the fastener under the push of the compressed gas.

[0030] In some embodiments, a first valve is further provided at the connection between the energy storage cylinder and the first cylinder, allowing gas in the first cylinder to flow into the energy storage cylinder.

[0031] In some embodiments, a second valve is further included, disposed at the connection between the energy storage cylinder and the second cylinder, allowing gas communication between the energy storage cylinder and the second cylinder.

[0032] In some embodiments, the power mechanism further includes a motor; when the motor rotation parameter is greater than or equal to a parameter threshold, the second valve opens to allow compressed gas in the energy storage cylinder to enter the second cylinder and push the striking member to strike the fastener.

[0033] In some embodiments, the second valve is configured to open automatically when the air pressure in the energy storage cylinder is greater than or equal to a pressure threshold.

[0034] In some embodiments, a third valve is also included, disposed at the connection between the first cylinder and the second cylinder, allowing gas to flow from the second cylinder into the first cylinder.

[0035] In some embodiments, a fourth valve is also included, disposed on the second cylinder, which allows gas in the second cylinder to flow to the outside when the striking member is in the striking position.

[0036] In some embodiments, a first piston is further included, disposed within the first cylinder. When the striking member is in the stopped position, the first piston is in an initial position. One compression of gas is completed when the first piston moves from the initial position to the maximum compression position. The second valve opens when the first piston reaches the maximum compression position for the Nth time.

[0037] In some embodiments, N is greater than or equal to 2.

[0038] In some embodiments, a first piston is further included, disposed within the first cylinder, and the first cylinder is provided with an air inlet. When the striking member is in the stopped position, the first piston is in the initial position, and the air inlet connects the first cylinder to the outside.

[0039] The advantages of this application are:

[0040] This application provides a fastener actuator, including a striking assembly and a power mechanism. The striking assembly includes a striking element, which is driven by a gas spring mechanism of the power mechanism to strike the fastener. The gas spring mechanism stores energy by storing compressed gas, increasing the pressure of the compressed air within a certain cylinder volume, thereby increasing the striking force of the driving striking element on the fastener. Attached Figure Description

[0041] Figure 1 This is a front view of a fastener driver;

[0042] Figure 2 This is a schematic diagram of a fastener driver;

[0043] Figure 3 This is a schematic diagram of a fastener driver removing its housing;

[0044] Figure 4 This is a schematic diagram of a motor and a reduction gear mechanism in a fastener driver;

[0045] Figure 5 This is a cross-sectional view of a fastener driver with the first piston in its initial position.

[0046] Figure 6 This is a cross-sectional view of a fastener actuator with the first piston in the maximum compression position;

[0047] Figure 7 This is a cross-sectional view of the first piston returning to its initial position in a fastener actuator;

[0048] Figure 8 This is a cross-sectional view of the first piston in a fastener actuator, which is in its maximum compression position for the second time.

[0049] Figure 9 This is a cross-sectional view of a fastener actuator with the second piston at top dead center;

[0050] Figure 10 This is a cross-sectional view of the first and second pistons resetting in a fastener driver.

[0051] In the picture:

[0052] 100. Fastener driver; 101. Strike line; 102. First strike line; 103. Second strike line; 104. Motor shaft; 111. Main body; 112. Handle; 113. Motor housing; 114. Through hole; 115. Joint; 200. Working surface; 300. Battery pack; 11. Housing; 12. Strike assembly; 121. Strike component; 13. Fan; 14. Motor; 141. Motor shaft; 142. Stator assembly; 143. Rotor assembly; 15. Reduction mechanism; 151. First reduction assembly; 1511. Output shaft; 1512. Crank; 1513. Drive rod; 16. Magazine assembly; 17. Circuit board assembly; 18. Trigger; 181. Operating surface; 20. Power mechanism; 21. Drive assembly; 22. Cylinder assembly; 221. First cylinder; 2210. First cylinder chamber; 2211. Air inlet; 222. Second cylinder; 2220. Second cylinder chamber; 223. Energy storage cylinder; 23. Firing assembly; 231. First piston; 232. Second piston; 24. Transmission assembly; 241. First bevel gear; 242. Second bevel gear; 243. Transmission rod; 25. First valve; 26. Second valve; 27. Third valve; 28. Fourth valve. Detailed Implementation

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] In this application, the terms "device," "module," or "unit" are used to describe devices that can be implemented in hardware or software to perform a specific function.

[0061] In this application, the terms “calculation,” “judgment,” “control,” “determine,” “identify,” etc., refer to the operation and process of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0062] 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.

[0063] like Figure 1 A fastener driver 100 according to one embodiment of this application is shown. The fastener driver 100 is used to drive a fastener into a working surface 200. For example, the fastener is a nail, which can be a flathead nail or a U-shaped nail. The fastener driver 100 drives the fastener to quickly drive into the working surface 200, thereby securing the working surface 200 to a platform on the back side of the working surface 200. In this embodiment, the fastener driver 100 is, for example, a nail gun. Optionally, the fastener driver 100 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 100 is a cylinder-type nail gun that performs the nailing action by compressing gas in a cylinder, which pushes out a firing assembly 23 to perform the nailing action.

[0064] In some embodiments, such as Figure 5 As shown, the fastener driver 100 is a cylinder-type nail gun. Exemplarily, the fastener driver 100 does not require an external air pressure source, but instead includes pre-charged pressurized gas within the cylinder assembly 22. Exemplarily, the cylinder assembly 22 of the fastener driver 100 is in communication with the atmosphere, and gas flows into the cylinder in a preset state.

[0065] like Figure 1 As shown, the fastener driver 100 is powered by a rechargeable battery pack. In this embodiment, the battery pack is a battery module 300, which, in conjunction with a corresponding power supply circuit, powers the fastener driver 100. Those skilled in the art will understand that in other embodiments, the fastener driver 100 may also be powered by other power supply devices. For example, the power supply may be an AC power line connected to the mains, or it may be other connecting cables that can be connected to a power supply device. The mains power or other power supply device, in conjunction with corresponding rectification, filtering, and voltage regulation circuits, powers the corresponding components of the fastener driver 100. The term "battery module 300" will be used hereinafter to refer to the power supply, but this should not be construed as a limitation of this application.

[0066] like Figures 1 to 3 As shown, the fastener driver 100 includes a housing 11, an impact assembly 12, and a power mechanism 20. The housing 11 supports the impact assembly 12 and the power mechanism 20. The power mechanism 20 includes a motor. The impact assembly 12 includes an impact member 121 that drives the fastener. Optionally, the impact member 121 drives the fastener to be injected into the working surface 200 along the impact line 101. The impact member 121 is a sheet-like element extending along a plane parallel to the impact line 101, and the axis defined by the impact member 121 coincides with the impact line 101. The power mechanism 20 drives the impact member 121 to move along the impact line 101, thereby impacting the fastener to be injected into the working surface 200 along the impact line 101.

[0067] For ease of description of the technical solution of this application, the following definitions are used: Figure 1 The front-back direction and the up-down direction are shown, wherein the front-back direction is parallel to the striking line 101, the direction from the striking member 121 to the fastener is front, and the up-down direction is perpendicular to the front-back direction.

[0068] like Figures 2-4 As shown, in this embodiment, the motor is disposed within the housing 11, and the motor is used to provide power to the power mechanism 20. In this embodiment, the motor is specifically an electric motor 14, which provides power to the power mechanism 20. It is understood that in other embodiments, the motor may be other forms of power source, such as an engine. In this application, for ease of explanation, an electric motor 14 is used for description. Figure 4 As shown, motor 14 is an internal rotor motor, comprising a stator assembly 142 and a rotor assembly 143. The rotor assembly 143 includes a motor shaft 141 for outputting power, and the stator assembly 142 surrounds the motor shaft 141. The motor shaft 141 is rotatable relative to the housing 11 about a motor axis 104 to output power. It is understood that in other embodiments, motor 14 may also be an external rotor motor. A battery pack 300 is detachably mounted to the housing 11. When mounted to the housing 11, the battery pack 300 can at least power the motor 14 to enable its operation.

[0069] like Figure 1 , Figure 2 , Figure 5As shown, the power mechanism 20 includes a drive assembly 21, a gas spring mechanism, and a firing assembly 23. The drive assembly 21 drives the gas spring mechanism to store energy. The firing assembly 23 forms with or connects to the striking member 121. The firing assembly 23 is configured to move relative to the housing 11 along a second straight line 103 and, when moving along the second straight line 103, drive the striking member 121 to move along the striking line 101. The gas spring mechanism stores energy for driving the firing assembly 23 and, when releasing the energy, drives the firing assembly 23 to move along the second straight line 103, thereby driving the striking member 121 to move along the striking line 101.

[0070] like Figures 1-2 As shown, the fastener driver 100 also includes a magazine assembly 16 disposed at the front end of the housing 11. The magazine assembly 16 is used to hold fasteners and can push the fasteners one by one into the striking assembly 12.

[0071] like Figure 1 As shown, the housing 11 includes a main body 111, a motor housing 113, and a handle 112. The main body 111 has a first receiving cavity for accommodating at least a portion of the energy storage assembly. The motor housing 113 houses a motor 14. The handle 112 is for a user to grip and operate the fastener driver 100. The motor housing 113 and the handle 112 extend downward from the lower part of the main body 111. The motor housing 113 is on the front side, and the handle 112 is on the rear side, extending substantially parallel to each other.

[0072] like Figure 1 As shown, the housing 11 further includes a coupling portion 115 for attaching the battery pack 300, to which the battery pack 300 can be detachably mounted. The coupling portion 115 spans between the motor receiving portion 113 and the end portion of the handle portion 112. Optionally, the coupling portion 115 is located at the end of the handle portion 112 away from the main body portion 111. The battery pack 300 can be mounted to the coupling portion 115 in a direction intersecting the direction of the second straight line 103. In some embodiments, the battery pack 300 can be mounted to the coupling portion 115 in a direction parallel to the second straight line 103.

[0073] The fastener driver 100 also includes a trigger 18, which is mounted to the handle portion 112. The user can operate the trigger 18 to activate it while holding the handle portion 112. The trigger 18 is used by the user to activate the fastener driver 100, and it also includes an operating surface 181 for user operation. When the user's hand holds the handle portion 112, the user can pull the trigger 18 by contacting the operating surface 181 with their index finger. The operating surface 181 is the front surface of the trigger 18. In this embodiment, the operating surface 181 is an arc-shaped surface that conforms to the user's finger.

[0074] like Figure 1 As shown, a through hole 114 for a user's hand to pass through is formed between the motor housing 113 and the handle portion 112. In this embodiment, the main body 111 connects the handle portion 112 and the motor housing 113 on the upper side, and the connecting portion 115 connects the handle portion 112 and the motor housing 113 on the lower side. Thus, the main body 111, the motor housing 113, the connecting portion 115, and the handle portion 112 are sequentially connected to surround and form the through hole 114. It is understood that in other embodiments, the connecting portion 115 may not connect the handle portion 112 and the motor housing 113, in which case the through hole 114 is the area between the handle portion 112 and the motor housing 113. The through hole 114 penetrates the housing 11 in a left-right direction perpendicular to the second straight line 103. When the user's hand grips the handle portion 112, the fingers can be at least partially located within the through hole 114, or the fingers can pass through the through hole 114, so that the user's palm and fingers can wrap around the handle portion 112 to grip it tightly. The trigger 18 is also provided in the area of ​​the through hole 114.

[0075] like Figure 2 As shown, the fastener driver 100 also includes a reduction gear 15 disposed between the motor 14 and the power mechanism 20. The reduction gear 15 connects the motor 14 and the power mechanism 20, thereby transmitting the power output from the motor 14 to the power mechanism 20. The reduction gear 15 also reduces the output speed of the motor 14 for output. The reduction gear 15 is at least partially disposed within the motor housing 113.

[0076] like Figure 4 As shown, in this embodiment, the deceleration mechanism 15 includes a first deceleration component 151, which employs a planetary gear reduction system. Since the deceleration principle of planetary gear sets and the deceleration generated by such a transmission mechanism are well-disclosed to those skilled in the art, detailed descriptions are omitted here for the sake of brevity.

[0077] In this embodiment, the fastener driver 100 further includes a shaft locking assembly (not shown) that transmits power to the output shaft 1511. The shaft locking assembly allows power to be transmitted from the motor 14 to the output shaft 1511 while preventing power from being transmitted back from the output shaft 1511 to the motor 14. The structure of the shaft locking assembly is a relatively common technology and will not be described in detail here.

[0078] like Figure 5As shown, in this embodiment, the gas spring mechanism includes a cylinder assembly 22. The cylinder assembly 22 includes a first cylinder 221 and a second cylinder 222. A portion or all of the second cylinder 222 is disposed within the first cylinder 221. The first cylinder 221 includes a first cylinder cavity 2210, which extends along a second straight line 103, and a portion or all of the second cylinder 222 is disposed within the first cylinder cavity 2210. The second cylinder 222 includes a second cylinder cavity 2220, which extends along a first straight line 102, and the second straight line 103 is parallel to the first straight line 102.

[0079] like Figure 5 As shown, the firing assembly 23 is disposed within the cylinder assembly 22, and the firing assembly 23 includes a first piston 231 and a second piston 232. Part or all of the first piston 231 is disposed within the first cylinder chamber 2210. The second piston 232 is disposed within the second cylinder chamber 2220. One end of the drive rod 1513 is connected to the first piston 231, and can push the first piston 231 to reciprocate along the direction of the second straight line 103 within the first cylinder chamber 2210 under the rotation of the motor 14. The second piston 232 can reciprocate along the direction of the first straight line 102 within the second cylinder chamber 2220.

[0080] like Figure 5 As shown, in some embodiments, a crank 1512 is connected to the output shaft 1511 of the motor 14. The crank 1512 is rotatably connected to the drive rod 1513, and the drive rod 1513 is rotatably connected to the first piston 231. During the rotation of the motor 14, the crank 1512 is driven to rotate, and the crank 1512 drives the drive rod 1513, thereby driving the first piston 231 to reciprocate along the direction of the second straight line 103 within the first cylinder cavity 2210.

[0081] like Figure 5 As shown, the striking element 121 and the second piston 232 are fixedly connected. The second piston 232 connects the striking element 121 to the second cylinder cavity 2220, where it reciprocates along the first straight line 102. When the user loads a nail into the magazine assembly 16, the second piston 232 pushes the striking element 121 to move and eject the nail.

[0082] As the requirements for nailing efficiency and force continue to increase, higher pressure is needed during the compressed air energy storage process, thus enabling compressed air-driven nail guns to achieve higher nailing capabilities. However, due to the limited space in the housing 11 of a compressed air-driven nail gun, the first cylinder 221, within a certain volume, finds it difficult to provide higher driving force to the second piston 232.

[0083] To address the aforementioned problems, in one embodiment, such as Figures 1-10As shown, this application provides a fastener actuator 100. With the striking element 121 in the stopped position, the first cylinder 221 is connected to the outside atmosphere, and the first piston 231 is in the initial position. Specifically, a gas compression is completed when the first piston 231 moves backward from the initial position to the maximum compression position. When the first piston 231 reaches the maximum compression position for the Nth time, the striking element 121 is released from the stopped position to strike the fastener. N is greater than or equal to 2; specifically, N can be 2, 3, 4, etc. By increasing the number of compressions, under the same space and compression rate, multiple compressions of air can achieve a higher gas pressure than a single compression. The higher the compressed air pressure, the stronger the force acting on the striking element 121. Therefore, within the same housing 11 space, the striking element 121 has a stronger nail-driving ability.

[0084] like Figure 5 As shown, in some embodiments, the fastener actuator 100 further includes a first valve 25, which is disposed at the connection between the energy storage cylinder 223 and the first cylinder 221 of the cylinder assembly 22, allowing gas in the first cylinder 221 to flow into the energy storage cylinder 223. The first valve 25 is a one-way valve. During the process of the first piston 231 moving backward from its initial position to its maximum compression position, a gas compression is completed, allowing the compressed air in the first cylinder 221 to flow unidirectionally into the energy storage cylinder 223 for storage. During the resetting process of the first piston 231, the first valve 25 closes, thereby preventing backflow of compressed gas in the energy storage cylinder 223. By repeatedly compressing air with the first piston 231 and storing it in the energy storage cylinder 223, the pressure of the compressed gas can be increased. This effectively increases the pressure of the compressed gas without increasing the cylinder volume.

[0085] like Figure 5 As shown, in some embodiments, the fastener driver 100 further includes a second valve 26. The second valve 26 is located at the connection between the energy storage cylinder 223 and the second cylinder 222 of the cylinder assembly 22, allowing gas communication between the energy storage cylinder 223 and the second cylinder 222. The second valve 26 is an on / off valve. When the air pressure in the energy storage cylinder 223 reaches the air pressure used by the striking member 121, the second valve 26 opens, allowing compressed air in the energy storage cylinder 223 to enter the second cylinder 222 and drive the striking member 121 to perform a striking action. By setting the second valve 26, the on / off connection between the energy storage cylinder 223 and the second cylinder 222 can be controlled, thereby ensuring that the stored compressed gas and the nail-driving action do not interfere with each other.

[0086] In some embodiments, when the rotation parameter of motor 14 is greater than or equal to a parameter threshold, the second valve 26 opens to allow compressed gas in the energy storage cylinder 223 to enter the second cylinder 222 and push the striking member 121 to strike the fastener. The rotation of motor 14 pushes the first piston 231 to reciprocate along the second straight line 103 within the first cylinder cavity 2210, thereby compressing the air. The number of rotations of motor 14 determines the number of times the first cylinder 221 compresses air into the energy storage cylinder 223. When the rotation parameter of motor 14 is greater than or equal to the parameter threshold, energy storage is considered complete, and the second valve 26 opens, allowing the compressed gas in the energy storage cylinder 223 to enter the second cylinder 222 for operation. In some embodiments, motor 14 can be communicatively connected to the second valve 26 via a controller, thereby controlling the opening and closing of the second valve 26 according to the rotation parameter of motor 14.

[0087] In some embodiments, the second valve 26 opens when the first piston 231 reaches its maximum compression position for the Nth time. During multiple reciprocating motions, the first piston 231 repeatedly forces air into the energy storage cylinder 223 in one direction, thereby increasing the air pressure in the energy storage cylinder 223. After multiple compressions to the required level are completed, the compressed air in the energy storage cylinder 223 can be used to drive the striking member 121 to actuate. The energy storage and nail-driving actions can be controlled by controlling the opening and closing of the second valve 26.

[0088] In some embodiments, the second valve 26 is configured to automatically open when the air pressure in the energy storage cylinder 223 is greater than or equal to a pressure threshold. The second valve 26 can be a pressure valve; when the air pressure in the energy storage cylinder 223 is greater than or equal to the pressure threshold, the second valve 26 opens to supply air to the second cylinder 222. This method facilitates control and is simple in structure and easy to implement.

[0089] like Figure 5As shown, in some embodiments, the fastener driver 100 further includes a transmission assembly 24, which is connected to both the drive assembly 21 and the second valve 26. The drive assembly 21 can control the second valve 26 to open or close via the transmission assembly 24. The transmission assembly 24 includes a first bevel gear 241 and a second bevel gear 242 that mesh with each other. The first bevel gear 241 is fixedly mounted on the output shaft 1511 of the motor 14, and the transmission rod 243 of the second bevel gear 242 is connected to the second valve 26. During the rotation of the output shaft 1511 driven by the motor 14, the first bevel gear 241 drives the second bevel gear 242 to rotate. The second bevel gear 242 drives the valve stem of the second valve 26 to move via the transmission rod 243, thereby adjusting the on / off state of the second valve 26. The second valve 26 has only two states: on and off. By using the transmission assembly 24 to control the second valve 26, the on / off state of the second valve 26 can be accurately controlled, and a rapid response can be ensured.

[0090] like Figure 5 As shown, in some embodiments, the fastener actuator 100 further includes a third valve 27, which is located at the connection between the first cylinder 221 and the second cylinder 222, allowing gas to flow from the second cylinder 222 into the first cylinder 221. The third valve 27 is also a one-way valve; it is closed when the first cylinder 221 is compressing gas. When the second piston 232 completes the nailing operation, the third valve 27 opens as the first piston 231 returns to its original position. The first piston 231 draws in air, creating a negative pressure within the first cylinder 221. Since the second cylinder 222 is connected to the first cylinder 221 via the third valve 27, a negative pressure is also created in the second cylinder 222. Driven by atmospheric pressure, the second piston 232 automatically resets. This method enables the second piston 232 to automatically reset after nailing without requiring a complex mechanical structure.

[0091] like Figure 5 As shown, in some embodiments, the fastener actuator 100 further includes a fourth valve 28, which is disposed on the second cylinder 222. The fourth valve 28 allows gas within the second cylinder 222 to flow to the outside when the striking member 121 is in the striking position. The fourth valve 28 is a one-way valve. During the process of the second piston 232 pushing the striking member 121 to the striking position, it is necessary to quickly expel the air from the second cylinder 222. During this process, the fourth valve 28 opens, allowing the gas in the second cylinder 222 to be rapidly discharged through the fourth valve 28 under the push of the second piston 232. This reduces the resistance of the gas in the second cylinder 222 acting on the second piston 232, reduces the pressure loss of the second piston 232, and ensures the striking force.

[0092] like Figure 5 As shown, in some embodiments, the first cylinder 221 is provided with an air inlet 2211. When the striking member 121 is in the stopped position, the first piston 231 is in the initial position, and the air inlet 2211 connects the first cylinder 221 to the outside. By providing the air inlet 2211, the first cylinder 221 is connected to the outside atmosphere when the first piston 231 is in the initial position. During the movement of the first piston 231 from the initial position to the maximum compression position, after passing the air inlet 2211, the first cylinder 221 is in a sealed state, at which time air can be effectively compressed. After the first piston 231 moves from the maximum compression position to the initial position, after passing the air inlet 2211, outside air enters the first cylinder 221 through the air inlet 2211, thereby breaking the negative pressure, causing the first piston 231 to quickly return to its original position, and simultaneously replenishing air into the first cylinder 221, facilitating the next compression.

[0093] The operation of this fastener driver 100 is as follows:

[0094] Initial state: such as Figure 5 As shown, the first piston 231 is in the initial position. At this time, the first cylinder 221 is connected to the air supply port 2211, the second valve 26 is in the connected state, the third valve 27 is open, the first cylinder 221 is connected to the second cylinder 222, and the energy storage cylinder 223 is connected to the second cylinder 222.

[0095] First-stage compressed gas energy storage: such as Figure 6 As shown, the motor 14 drives the first piston 231 from the initial position to the maximum compression position through the crank 1512 and the drive rod 1513. The first valve 25 opens, and the second valve 26 and the third valve 27 close. The air in the first cylinder 221 is forced into the energy storage cylinder 223.

[0096] First piston 231 returns to its initial position: as follows Figure 7 As shown, the motor 14 drives the first piston 231 from the maximum compression position to the initial position via the crank 1512 and the drive rod 1513. The first valve 25 is closed, and the pressure in the first cylinder 221 begins to drop. Until it drops to atmospheric pressure, both the first valve 25 and the third valve 27 are closed. The first piston 231 continues to move until the pressure in the first cylinder 221 drops below atmospheric pressure. The third valve 27 opens, and the second piston 232 remains at the bottom dead center under the action of negative pressure. The motor 14 drives the first piston 231 to continue moving until it passes the air inlet 2211 and returns to the initial position.

[0097] The nailing process: repeat the first compression and energy storage and the return of the first piston 231 to the initial position, until the Nth time the first piston 231 moves to the maximum compression position, as follows. Figure 8As shown, the nailing process begins. At this time, the second valve 26 is in the connected state, as indicated. Figure 9 As shown, the compressed gas in the energy storage cylinder 223 enters the second cylinder 222 through the second valve 26, pushing the striking part 121 to the lower dead center and moving forward to complete the strike. The fourth valve 28 is in the open state. The second piston 232 moves to the upper dead center and stops. At this time, the second piston 232 passes the fourth valve 28.

[0098] The process of the second piston 232 returning to the bottom dead center: as follows Figure 10 As shown, the first piston 231 returns to its initial position under the drive of the motor 14, the second valve 26 and the first valve 25 are both closed, the third valve 27 is opened, and the second piston 232 returns to the lower dead center under the action of the external atmosphere, completing one strike action.

[0099] like Figure 5 As shown, in another embodiment, this application provides a fastener driver 100, including an energy storage cylinder 223, which is unidirectionally connected to a first cylinder 221 and is configured to store compressed gas; a second cylinder 222 is at least connected to the energy storage cylinder 223, and the second cylinder 222 has a built-in striking member 121, which strikes the fastener under the push of the compressed gas.

[0100] By setting up an energy storage cylinder 223, compressed air can be stored in the energy storage cylinder 223 using the first cylinder 221. Energy is stored by repeatedly compressing air in the first cylinder 221, increasing the air pressure in the energy storage cylinder 223. Then, the energy storage cylinder 223 is connected to the second cylinder 222, and the compressed gas in the energy storage cylinder 223 drives the striking member 121 to perform a nail-driving action, which can improve the impact effect of the driving striking member 121 on the fastener.

[0101] like Figure 5 As shown, in some embodiments, the fastener actuator 100 further includes a first valve 25, which is disposed at the connection between the energy storage cylinder 223 and the first cylinder 221, allowing gas in the first cylinder 221 to flow into the energy storage cylinder 223. The first valve 25 is a one-way valve. During the process of the first piston 231 moving backward from its initial position to its maximum compression position, a gas compression is completed, allowing the compressed air in the first cylinder 221 to flow unidirectionally into the energy storage cylinder 223 for storage. During the resetting process of the first piston 231, the first valve 25 closes, thereby preventing backflow of compressed gas in the energy storage cylinder 223. By repeatedly compressing air with the first piston 231 and storing it in the energy storage cylinder 223, the pressure of the compressed gas can be increased. This effectively increases the pressure of the compressed gas without increasing the cylinder volume.

[0102] like Figure 5As shown, in some embodiments, the fastener driver 100 further includes a second valve 26, which is located at the connection between the energy storage cylinder 223 and the second cylinder 222, allowing gas communication between the energy storage cylinder 223 and the second cylinder 222. The second valve 26 is an on / off valve; when the air pressure in the energy storage cylinder 223 reaches the air pressure used by the striking member 121, the second valve 26 opens, allowing compressed air from the energy storage cylinder 223 to enter the second cylinder 222 and drive the striking member 121 to perform the striking action. By setting the second valve 26, the on / off connection between the energy storage cylinder 223 and the second cylinder 222 can be controlled, thereby ensuring that the stored compressed gas and the nail-driving action do not interfere with each other.

[0103] In some embodiments, the drive assembly 21 further includes a motor 14; when the rotation parameter of the motor 14 is greater than or equal to a parameter threshold, the second valve 26 opens to allow compressed gas in the energy storage cylinder 223 to enter the second cylinder 222 and push the striking member 121 to strike the fastener. The rotation of the motor 14 pushes the first piston 231 to reciprocate along the direction of the second straight line 103 within the first cylinder cavity 2210, thereby achieving the action of compressed air. The number of rotations of the motor 14 determines the number of times the first cylinder 221 compresses air into the energy storage cylinder 223. When the rotation parameter of the motor 14 is greater than or equal to the parameter threshold, energy storage is considered complete, and the second valve 26 is opened, allowing the compressed gas in the energy storage cylinder 223 to enter the second cylinder 222 for operation. The motor 14 can be communicatively connected to the second valve 26 via a controller, thereby controlling the opening and closing of the second valve 26 according to the rotation parameter of the motor 14.

[0104] In some embodiments, the second valve 26 is configured to automatically open when the air pressure in the energy storage cylinder 223 is greater than or equal to a pressure threshold. The second valve 26 can be a pressure valve; when the air pressure in the energy storage cylinder 223 is greater than or equal to the pressure threshold, the second valve 26 opens to supply air to the second cylinder 222. This method facilitates control and is simple in structure and easy to implement.

[0105] like Figure 5As shown, in some embodiments, the fastener actuator 100 further includes a third valve 27, which is located at the connection between the first cylinder 221 and the second cylinder 222, allowing gas to flow from the second cylinder 222 into the first cylinder 221. The third valve 27 is also a one-way valve; it is closed when the first cylinder 221 is compressing gas. When the second piston 232 completes the nailing operation, the third valve 27 opens as the first piston 231 returns to its original position. The first piston 231 draws in air, creating a negative pressure within the first cylinder 221. Since the second cylinder 222 is connected to the first cylinder 221 via the third valve 27, a negative pressure is also created in the second cylinder 222. Driven by atmospheric pressure, the second piston 232 automatically resets. This method enables the second piston 232 to automatically reset after nailing without requiring a complex mechanical structure.

[0106] like Figure 5 As shown, in some embodiments, the fastener actuator 100 further includes a fourth valve 28, which is disposed on the second cylinder 222. The fourth valve 28 allows gas within the second cylinder 222 to flow to the outside when the striking member 121 is in the striking position. The fourth valve 28 is a one-way valve. During the process of the second piston 232 pushing the striking member 121 to the striking position, it is necessary to quickly expel the air from the second cylinder 222. During this process, the fourth valve 28 opens, allowing the gas in the second cylinder 222 to be rapidly discharged through the fourth valve 28 under the push of the second piston 232. This reduces the resistance of the gas in the second cylinder 222 acting on the second piston 232, reduces the pressure loss of the second piston 232, and ensures the striking force.

[0107] like Figure 5 As shown, in some embodiments, the fastener driver 100 further includes a first piston 231 disposed within the first cylinder 221. When the striking member 121 is in the stopped position, the first piston 231 is in the initial position. As the first piston 231 moves from the initial position to the maximum compression position, one compression of gas is completed. When the first piston 231 reaches the maximum compression position for the Nth time, the second valve 26 opens. In some embodiments, N is greater than or equal to 2. During multiple reciprocating movements, the first piston 231 repeatedly and unidirectionally compresses air into the energy storage cylinder 223, thereby increasing the air pressure in the energy storage cylinder 223. After multiple compressions to the required level, the compressed air in the energy storage cylinder 223 can be used to drive the striking member 121 to actuate. The energy storage and nail-driving actions can be controlled by controlling the opening and closing of the second valve 26.

[0108] like Figure 5As shown, in some embodiments, the fastener driver 100 further includes a first piston 231 disposed within a first cylinder 221. The first cylinder 221 has an air inlet 2211. When the striking member 121 is in the stopped position, the first piston 231 is in its initial position, and the air inlet 2211 connects the first cylinder 221 to the outside. By providing the air inlet 2211, the first cylinder 221 is connected to the outside atmosphere when the first piston 231 is in its initial position. During the movement of the first piston 231 from its initial position to its maximum compression position, after passing the air inlet 2211, the first cylinder 221 is in a sealed state, allowing for effective air compression. After the first piston 231 moves from its maximum compression position back to its initial position, after passing the air inlet 2211, outside air enters the first cylinder 221 through the air inlet 2211, thereby breaking the negative pressure and causing the first piston 231 to quickly return to its original position. Simultaneously, air is replenished to the first cylinder 221, facilitating the next compression.

[0109] The operation of this fastener driver 100 is as follows:

[0110] Initial state: such as Figure 5 As shown, the first piston 231 is in the initial position. At this time, the first cylinder 221 is connected to the air supply port 2211, the second valve 26 is in the connected state, the third valve 27 is open, the first cylinder 221 is connected to the second cylinder 222, and the energy storage cylinder 223 is connected to the second cylinder 222.

[0111] First-stage compressed gas energy storage: such as Figure 6 As shown, the motor 14 drives the first piston 231 from the initial position to the maximum compression position through the crank 1512 and the drive rod 1513. The first valve 25 opens, and the second valve 26 and the third valve 27 close. The air in the first cylinder 221 is forced into the energy storage cylinder 223.

[0112] First piston 231 returns to its initial position: as follows Figure 7 As shown, the motor 14 drives the first piston 231 from the maximum compression position to the initial position via the crank 1512 and the drive rod 1513. The first valve 25 is closed, and the pressure in the first cylinder 221 begins to drop. Until it drops to atmospheric pressure, both the first valve 25 and the third valve 27 are closed. The first piston 231 continues to move until the pressure in the first cylinder 221 drops below atmospheric pressure. The third valve 27 opens, and the second piston 232 remains at the bottom dead center under the action of negative pressure. The motor 14 drives the first piston 231 to continue moving until it passes the air inlet 2211 and returns to the initial position.

[0113] The nailing process: repeat the first compression and energy storage and the return of the first piston 231 to the initial position, until the Nth time the first piston 231 moves to the maximum compression position, as follows. Figure 8 As shown, it enters the nailing state. At this time, the second valve 26 is in the connected state, as shown. Figure 9 As shown, the compressed gas in the energy storage cylinder 223 enters the second cylinder 222 through the second valve 26, pushing the striking part 121 to move forward from the bottom dead center to complete the strike. The fourth valve 28 is in the open state. The second piston 232 moves to the top dead center and stops. At this time, the second piston 232 passes the fourth valve 28.

[0114] The process of the second piston 232 returning to the bottom dead center: as follows Figure 10 As shown, the first piston 231 returns to its initial position under the drive of the motor 14, the second valve 26 and the first valve 25 are both closed, the third valve 27 is opened, and the second piston 232 returns to the lower dead center under the action of the external atmosphere, completing one strike action.

[0115] In some embodiments, the cylinder assembly 22 further includes a connecting member for connecting the first cylinder chamber 2210 and the second cylinder chamber 2220, through which gas in the first cylinder chamber 2210 can enter the second cylinder chamber 2220.

[0116] In some embodiments, when the drive assembly 21 pushes the first piston 231 to move from front to back within the first cylinder chamber 2210 along the direction of the second straight line 103, the gas in the first cylinder chamber 2210 enters the second cylinder chamber 2220 through the connecting part. As the first piston 231 gradually approaches the connecting part, the air pressure on the second piston 232 gradually increases. When the air pressure on the second piston 232 reaches a predetermined threshold, the second piston 232 is released from the attraction of the magnet and moves from the top dead center or stop position to the bottom dead center or striking position under the action of air pressure, thereby pushing the striking member 121 forward to strike the nail.

[0117] like Figure 2 As shown, in some embodiments, a circuit board assembly 17 is also provided within the joint 115. The circuit board assembly 17 is electrically connected to the motor 14 to control the operation of the motor 14. A capacitor is provided on the upper side of the circuit board assembly 17. An electrical connection terminal is provided on the lower side of the circuit board assembly 17, which is used to form an electrical connection with the battery pack 300 so that the battery pack 300 supplies power to the motor 14.

[0118] like Figure 2As shown, the fastener driver 100 also includes a fan 13, which is fixedly connected to the motor shaft 141 and can rotate synchronously with the motor shaft 141. The fan 13 is mounted on the upper end of the motor shaft 141. When the fan 13 rotates, it generates a cooling airflow that flows into the housing 11 from the outside and then out of the housing 11. An airflow inlet and an airflow outlet are formed on the housing 11. The airflow inlet corresponds to the position of the fan 13, and the airflow outlet corresponds to the position of the circuit board assembly 17. In this embodiment, a high-power capacitor is provided on the circuit board assembly 17. The airflow outlet also corresponds to the position of the capacitor. When the fan 13 rotates, the cooling airflow enters the housing 11 from the airflow inlet, then flows through the circuit board assembly 17 and exits from the airflow outlet.

[0119] In some embodiments, a partition for separating the motor 14 and the circuit board assembly 17 may also be provided at the joint 115, so that the heat generated by the motor 14 during operation will not enter the circuit board assembly 17.

[0120] 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, comprising: The striking component (12) includes a striking element (121) configured to strike a fastener; The power mechanism (20) includes a gas spring mechanism that drives the striking member (121); The gas spring mechanism includes at least: The cylinder assembly (22) includes a first cylinder (221) which is in communication with the outside atmosphere when the striking member (121) is in the stopped position; The first piston (231) is disposed in the first cylinder (221), and when the striking member (121) is in the stopped position, the first piston (231) is in the initial position; Wherein, a gas compression is completed when the first piston (231) moves from the initial position to the maximum compression position, and when the first piston (231) reaches the maximum compression position for the Nth time, the striking member (121) is released from the stop position, where N is greater than or equal to 2.

2. The fastener driver of claim 1, wherein, It also includes a first valve (25) disposed at the connection between the energy storage cylinder (223) and the first cylinder (221) of the cylinder assembly (22), allowing gas in the first cylinder (221) to flow into the energy storage cylinder (223).

3. The fastener driver of claim 2, wherein, It also includes a second valve (26) disposed at the connection between the energy storage cylinder (223) and the second cylinder (222) of the cylinder assembly (22), allowing gas communication between the energy storage cylinder (223) and the second cylinder (222).

4. The fastener driver according to claim 3, characterized in that, The power mechanism (20) also includes a motor (14), and when the rotation parameter of the motor (14) is greater than or equal to a parameter threshold, the second valve (26) opens to allow compressed gas in the energy storage cylinder (223) to enter the second cylinder (222) and push the striking member (121) to strike the fastener.

5. The fastener driver according to claim 3, characterized in that, The second valve (26) is configured to open automatically when the air pressure in the energy storage cylinder (223) is greater than or equal to the air pressure threshold.

6. The fastener driver according to claim 3, characterized in that, It also includes a third valve (27) located at the connection between the first cylinder (221) and the second cylinder (222), allowing gas to flow from the second cylinder (222) into the first cylinder (221).

7. The fastener driver according to claim 3, characterized in that, It also includes a fourth valve (28) disposed on the second cylinder (222), which allows gas in the second cylinder (222) to flow to the outside when the striking member (121) is in the striking position.

8. The fastener driver according to claim 3, characterized in that, It also includes a transmission assembly (24), which is connected to the power mechanism (20) and the second valve (26) respectively. The power mechanism (20) can control the second valve (26) to open or close through the transmission assembly (24).

9. The fastener driver according to claim 3, characterized in that, The second valve (26) opens when the first piston (231) reaches the maximum compression position for the Nth time.

10. The fastener driver according to claim 1, characterized in that, The first cylinder (221) is provided with an air inlet (2211). When the striking member (121) is in the stopped position, the first piston (231) is in the initial position, and the air inlet (2211) connects the first cylinder (221) to the outside.

11. A fastener driver, comprising: The striking component (12) includes a striking element (121) configured to strike a fastener; The power mechanism (20) includes a gas spring mechanism that drives the striking member (121); The gas spring mechanism includes at least: The cylinder assembly (22) includes a first cylinder (221) which is in communication with the outside atmosphere when the striking member (121) is in the stopped position; The energy storage cylinder (223) is unidirectionally connected to the first cylinder (221) and is configured to store compressed gas; The second cylinder (222) is at least connected to the energy storage cylinder (223), and the second cylinder (222) has the impact member (121) built in it. The impact member (121) strikes the fastener under the push of the compressed gas.

12. The fastener driver according to claim 11, characterized in that, It also includes a first valve (25) disposed at the connection between the energy storage cylinder (223) and the first cylinder (221), allowing gas in the first cylinder (221) to flow into the energy storage cylinder (223).

13. The fastener driver according to claim 12, characterized in that, It also includes a second valve (26) disposed at the connection between the energy storage cylinder (223) and the second cylinder (222), allowing gas communication between the energy storage cylinder (223) and the second cylinder (222).

14. The fastener driver according to claim 13, characterized in that, The power mechanism (20) also includes a motor (14); when the rotation parameter of the motor (14) is greater than or equal to the parameter threshold, the second valve (26) opens to allow compressed gas in the energy storage cylinder (223) to enter the second cylinder (222) and push the striking member (121) to strike the fastener.

15. The fastener driver according to claim 13, characterized in that, The second valve (26) is configured to open automatically when the air pressure in the energy storage cylinder (223) is greater than or equal to the air pressure threshold.

16. The fastener driver according to claim 13, characterized in that, It also includes a third valve (27) located at the connection between the first cylinder (221) and the second cylinder (222), allowing gas to flow from the second cylinder (222) into the first cylinder (221).

17. The fastener driver according to claim 13, characterized in that, It also includes a fourth valve (28) disposed on the second cylinder (222), which allows gas in the second cylinder (222) to flow to the outside when the striking member (121) is in the striking position.

18. The fastener driver according to claim 13, characterized in that, It also includes a first piston (231) disposed in the first cylinder (221). When the striking member (121) is in the stopped position, the first piston (231) is in the initial position. When the first piston (231) moves from the initial position to the maximum compression position, a gas compression is completed. When the first piston (231) reaches the maximum compression position for the Nth time, the second valve (26) opens.

19. The fastener driver according to claim 18, characterized in that, N is greater than or equal to 2.

20. The fastener driver according to claim 11, characterized in that, It also includes a first piston (231) disposed in the first cylinder (221). The first cylinder (221) is provided with an air inlet (2211). When the striking member (121) is in the stopped position, the first piston (231) is in the initial position, and the air inlet (2211) connects the first cylinder (221) to the outside.

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