Nail gun

Abstract

The application discloses a nail gun, comprising: a striking assembly comprising a striker configured to strike a fastener and a first piston mounting the striker; a cylinder assembly comprising a cylinder, a second piston and an end cover, the cylinder is formed with a chamber configured to accommodate the first piston and the second piston, and the end cover is connected to the front end of the cylinder; a housing configured to support the cylinder assembly; a motor arranged in the housing; a transmission assembly configured to drive the second piston to move in the cylinder; characterized in that the end cover comprises: a first end cover part connected to the housing and comprising a support part supporting the transmission assembly; a second end cover part movably connected to the first end cover part; wherein the first end cover part is provided with a first opening, and the second end cover part is connected to the first opening; when at least part of the second end cover part moves in a direction away from the first end cover part, the first opening is exposed to allow the striking assembly to be separated from the cylinder assembly. The nail gun is convenient and fast to use.

Description

Technical Field

[0001] This application relates to the field of power tools, and more particularly to a nail gun. Background Technology

[0002] One type of nail gun in related technologies is a commonly used fastening tool. In existing nail guns, a motor is connected to a gear and drives the gear to rotate. The gear is connected to a crank and connecting rod, which drive a piston to reciprocate within a cylinder, thereby moving a firing pin as the gear rotates. The firing pin drives the fastener into the workpiece. If the firing pin is damaged or broken during use, the user needs to disassemble the nail gun to replace it.

[0003] This section provides background information related to this application, which is not necessarily prior art. Summary of the Invention

[0004] One object of this application is to solve or at least alleviate some or all of the aforementioned problems. Therefore, the object of this application is to provide a nail gun that is convenient and quick to use.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A nail gun includes: a striking assembly comprising a firing pin configured to strike a fastener and a first piston mounting the firing pin; a cylinder assembly comprising a cylinder body, a second piston, and an end cap, the cylinder body forming a chamber configured to receive the first piston and the second piston, the end cap being connected to a front end of the cylinder body; a housing configured to support the cylinder assembly; a motor disposed within the housing; and a transmission assembly configured to drive the second piston to move within the cylinder body; characterized in that the end cap comprises: a first end cap portion connected to the housing and including a support portion supporting the transmission assembly; and a second end cap portion movably connected to the first end cap portion; wherein the first end cap portion has a first opening, and the second end cap portion is connected to the first opening; when at least a portion of the second end cap portion moves toward a direction away from the first end cap portion, the first opening is exposed to allow the striking assembly to disengage from the cylinder assembly.

[0007] In some embodiments, the nail gun includes a connector that detachably connects the second end cap to the first end cap.

[0008] In some embodiments, the nail gun includes a nail carriage that guides the firing pin along a first straight line, and a second end cap that supports at least a portion of the nail carriage. When at least a portion of the second end cap moves in a direction away from the first end cap, the nail carriage moves with at least a portion of the second end cap in a direction away from the first end cap.

[0009] In some embodiments, the nail gun includes a magazine that houses fasteners, the magazine supporting at least a portion of the nail holder, and the magazine moving with at least a portion of the second end cap in a direction away from the first end cap as the second end cap moves in a direction away from the first end cap.

[0010] In some embodiments, the firing pin moves along a substantially first straight line, the cross-section of the first opening is substantially circular, the cross-section of the first piston is substantially circular, and the center of the cross-section of the first piston and the center of the cross-section of the first opening are substantially located on the first straight line.

[0011] In some embodiments, the second end cap is provided with a second opening, the cross-section of the second opening is substantially circular, and the center of the cross-section of the second opening is substantially located on the first straight line.

[0012] In some embodiments, the chamber includes a first chamber for reciprocating motion of a first piston and a second chamber for reciprocating motion of a second piston.

[0013] In some embodiments, the end cap includes a vent, a first chamber, and a second chamber connected in sequence such that when the first piston moves toward the end cap, at least a portion of the air in the first chamber flows to the second chamber.

[0014] In some embodiments, the nail gun includes a depth adjustment device configured to adjust the stroke length of a first piston. The depth adjustment device includes a buffer and an operating member, wherein the buffer moves axially along the first chamber when the operating member rotates.

[0015] In some embodiments, the first end cap includes a first vent, and the second end cap includes a second vent, the first vent and the second vent together constituting a vent.

[0016] In some embodiments, the firing pin includes a firing pin body and a firing pin head, the firing pin head being located at the end of the firing pin body away from the first piston, and the firing pin head being detachably connected to the firing pin body.

[0017] In some embodiments, at least a portion of the second end cap, at least a portion of the first end cap, and at least a portion of the transmission assembly are arranged sequentially from top to bottom.

[0018] In some embodiments, the first end cap includes a first receiving portion that accommodates at least a portion of the transmission assembly.

[0019] In some embodiments, the maximum dimension of the second end cap in the vertical direction is smaller than the maximum dimension of the first end cap in the vertical direction.

[0020] A nail gun includes: a striking assembly including a firing pin configured to strike a fastener and a first piston mounting the firing pin; a cylinder assembly including a cylinder body, a second piston, and an end cap, the cylinder body forming a chamber configured to receive the first piston and the second piston, the end cap being connected to a front end of the cylinder body; and a housing configured to support the cylinder assembly; characterized in that the end cap includes: a first end cap portion connected to the housing; and a second end cap portion movably connected to the first end cap portion; wherein the first end cap portion has a first opening, and the second end cap portion is connected to the first opening; when at least a portion of the second end cap portion moves toward a direction away from the first end cap portion, the first opening is exposed to allow the striking assembly to disengage from the cylinder assembly.

[0021] A nail gun includes: a striking assembly comprising a firing pin configured to strike a fastener and a first piston mounting the firing pin; a cylinder assembly comprising a cylinder body, a second piston, and an end cap, the cylinder body forming a chamber configured to receive the first piston and the second piston, the end cap being connected to a front end of the cylinder body; and a transmission assembly configured to drive the second piston to move within the cylinder body; characterized in that the end cap comprises: a first end cap portion supporting the transmission assembly; and a second end cap portion movably connected to the first end cap portion; wherein the first end cap portion has a first opening, and the second end cap portion is connected to the first opening; when at least a portion of the second end cap portion moves toward a direction away from the first end cap portion, the first opening is exposed to allow the striking assembly to disengage from the cylinder assembly.

[0022] The advantage of this application is that the user can replace the firing pin through the active second end cap, making the nail gun convenient and quick to use. Attached Figure Description

[0023] Figure 1 This is a perspective view of a nail gun according to an embodiment of this application;

[0024] Figure 2 yes Figure 1 A perspective view of the cylinder assembly, first end cap, transmission assembly, and motor of the nail gun.

[0025] Figure 3 yes Figure 1 A front view of the cylinder assembly, first end cap, second end cap, nail holder, transmission assembly, and motor of the nail gun.

[0026] Figure 4 yes Figure 3 A cross-sectional view of a nail gun along line AA at one time;

[0027] Figure 5 yes Figure 3 A cross-sectional view of the nail gun along line AA at another time;

[0028] Figure 6 yes Figure 4 Enlarged view of some structural components of the nail gun;

[0029] Figure 7 yes Figure 5 Enlarged view of some structural components of the nail gun;

[0030] Figure 8 yes Figure 1 An exploded view of the cylinder assembly of a nail gun, including the first and second end caps, from one perspective.

[0031] Figure 9 yes Figure 1 An exploded view of the cylinder assembly of the nail gun, including the first and second end caps, from another perspective.

[0032] Figure 10 yes Figure 1 Front view of the cylinder assembly and striking assembly of the nail gun in the picture;

[0033] Figure 11 yes Figure 10 A cross-sectional view of the cylinder assembly and striking assembly of the nail gun along the CC line;

[0034] Figure 12 yes Figure 1 A schematic diagram showing the nail gun at the second end cap, with the nail holder and magazine removed from the first end cap;

[0035] Figure 13 yes Figure 1 Exploded view of the depth adjustment device of the nail gun, the second end cap and part of the nail holder;

[0036] Figure 14 yes Figure 1 A 3D diagram of the firing pin of a nail gun. Detailed Implementation

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

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

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

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

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

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

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

[0044] In this application, the terms "controller," "processor," "central processing unit," "CPU," and "MCU" are used interchangeably. When using the unit "controller," "processor," "central processing unit," "CPU," or "MCU" to perform a specific function, unless otherwise stated, these functions may be performed by a single or multiple of the aforementioned units.

[0045] 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.

[0046] 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.).

[0047] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments.

[0048] like Figure 1 As shown, this embodiment provides a nail gun 100. The nail gun 100 can generate a striking force on fasteners, thereby driving the fasteners into the workpiece. The nail gun 100 includes a housing 11 and a magazine 12. A receiving space 111 is formed on the inner side of the housing 11. The magazine 12 is used to receive fasteners, and the magazine 12 is disposed on the outer side of the housing 11, with at least a portion of the magazine 12 located in front of the housing 11. The fastener provided in this embodiment is a nail. The size of the nail can be 15Ga, 16Ga, 18Ga, 23Ga, 25Ga, etc., and is not limited here. The housing 11 also forms a handle 112 for the user to hold, and a main switch is provided on the handle 112, through which the user controls the start and stop of the nail gun 100. One end of the handle 112 is connected to a power interface 113, which is used to connect to a DC or AC power source. In this embodiment, the power interface 113 is connected to a battery pack 114.

[0049] like Figures 1 to 5As shown, the nail gun 100 also includes a striking assembly 20, a cylinder assembly 30, a motor 13, and a transmission assembly 14. The cylinder assembly 30, motor 13, and transmission assembly 14 are housed in a receiving space 111. The striking assembly 20 is located at the front end of the housing 11 and is partially housed in the receiving space 111. The striking assembly 20 includes a firing pin 21 and a first piston 22. The firing pin 21 is mounted on the first piston 22, which is substantially located behind the firing pin 21. The firing pin 21 is configured to move along a first straight line 101 to output a striking force to the fastener. The direction of the first straight line 101 is the direction in which the fastener is driven into the workpiece. After the firing pin 21 completes one strike, nails from the magazine 12 are replenished to the firing pin 21, awaiting to be fired by the firing pin 21. The cylinder assembly 30 is supported by the housing 11. The cylinder assembly 30 includes a cylinder body 31, which forms a chamber 32. The cylinder assembly 30 also includes a second piston 33. The first piston 22 and the second piston 33 are housed in the chamber 32. In this embodiment, the cylinder body 31 includes a first cylinder body 311 and a second cylinder body 312. The second cylinder body 312 is fitted over the first cylinder body 311, and a gap is left between the second cylinder body 312 and the first cylinder body 311. The first cylinder body 311 and the second cylinder body 312 are substantially cylindrical and extend in the front-rear direction. The first cylinder body 311 forms a first chamber 313 to house the first piston 22, and the second cylinder body 312 forms a second chamber 314 to house the second piston 33. The first piston 22 reciprocates within the first chamber 313. The second piston 33 includes a hole through which the first cylinder body 311 passes to allow the second piston 33 to reciprocate within the second chamber 314. The transmission assembly 14 includes a gear set 141, a crank 142, and a connecting rod 143. The gear set 141 includes an output shaft 144. Crank 142 is mounted on output shaft 144. One end of connecting rod 143 is connected to crank 142, and the other end is connected to second piston 33. Motor 13 drives gear set 141 to rotate, and gear set 141 drives output shaft 144 to rotate. Crank 142 rotates around output shaft 144 as the center of rotation, and drives connecting rod 143 to drive second piston 33 to reciprocate within second cylinder 312.

[0050] like Figures 2 to 9As shown, the cylinder body 31 has a cylinder opening 34 at its front end, through which the firing pin 21 enters and exits the cylinder body 31. The cylinder assembly 30 also includes an end cap 40. The end cap 40 is connected to the front end of the cylinder body 31. The end cap 40 includes a first end cap portion 41 and a second end cap portion 42. The first end cap portion 41 is connected to the housing 11. In some embodiments, the first end cap portion 41 may also be directly connected to the cylinder body 31. The first end cap portion 41 includes a support portion 43, a first receiving portion 44, and a second receiving portion 45. At least a portion of the second end cap portion 42, at least a portion of the first end cap portion 41, and at least a portion of the transmission assembly 14 are arranged sequentially from top to bottom. The second end cap portion 42 and the second receiving portion 45 are substantially aligned in the vertical direction. The second end cap portion 42, the second receiving portion 45, the first receiving portion 44, the support portion 43, and the gearbox of the transmission assembly 14 are arranged sequentially from top to bottom. The support portion 43 is used to support the transmission assembly 14. At least a portion of the support portion 43 is disposed below the second end cap portion 42. The support portion 43 is formed on or integrally formed with the first receiving portion 44. In this embodiment, the support portion 43 is integrally formed with the first receiving portion 44. The support portion 43 forms or is connected to a third receiving portion 431 for accommodating the transmission assembly 14. In this embodiment, the third receiving portion 431 is fixedly mounted to the output shaft 144 of the support portion 43 by means of a connector 46, such as a screw. A portion of the output shaft 144 is located in the third receiving portion 431 and meshes with the gear set 141, and a portion is located in the first receiving portion 44 and engages with the crank 142.

[0051] The first receiving portion 44 is basically located below the first cylinder body 311 and in front of the second cylinder body 312. The first receiving portion 44 opens rearward, and the second cylinder body 312 opens forward, so that the first receiving portion 44 communicates with the second chamber 314. The connecting rod 143 extends from the first receiving portion 44 to the second cylinder body 312. When the motor 13 drives the connecting rod 143 to move, the connecting rod 143 drives the second piston 33 housed in the second cylinder body 312 to reciprocate.

[0052] The second receiving portion 45 is located substantially in front of the first cylinder 311 and the second cylinder 312 and is fitted onto the front end of the first cylinder 311. The second receiving portion 45 opens rearward, and the first cylinder 311 opens forward, so that the second receiving portion 45 communicates with the first chamber 313.

[0053] The first cylinder body 311 includes a venting portion 315 and a venting hole 316. The venting portion 315 is located at the front end of the first chamber. The venting hole 316 is used to discharge gas in front of the first piston 22 to the atmosphere. There may be one or more venting holes 316, which are circumferentially formed on the venting portion 315. In this embodiment, the venting holes 316 are multiple circular holes. A one-way valve 317 is installed at the venting hole 316, which allows gas to flow out of the first chamber 313 but not into it. The venting portion 315 is accommodated in a second accommodating portion 45, thus communicating with the first chamber 313. The first cylinder body 311 includes a gas supply groove 318 through which atmospheric air flows into the second chamber 314. The first cylinder body 311 includes an outer wall 319. There may be one or more air supply grooves 318, which are circumferentially formed on the outer wall 319. In this embodiment, the air supply groove 318 is strip-shaped and extends in the front-rear direction. The first end cap portion 41 is provided with a first opening 411 for the firing pin 21 to pass through, and the first opening 411 is located at the front end of the first end cap portion 41. Figures 8 to 11 As shown, the cross-sections of the first opening 411, the first cylinder 311, and the first piston 22 are substantially circular. The centers of the cross-sections of the first cylinder 311, the first piston 22, and the first opening 411 are substantially located on the first straight line 101. The diameter of the first opening 411 is larger than the diameter of the first piston 22 so that the user can remove the firing pin 21 together with the first piston 22 from the first opening 411.

[0054] The second end cap 42 is movably connected to the first end cap 41. The second end cap 42 is substantially located in front of the second receiving portion 45 and above the first receiving portion 44. The second end cap 42 is connected to the first opening 411. When at least a portion of the second end cap 42 moves away from the first end cap 41, the first opening 411 is exposed to allow the striking assembly 20 to disengage from the cylinder assembly 30. The movement of at least a portion of the second end cap 42 away from the first end cap 41 includes rotation, sliding, or movement of at least a portion of the second end cap 42. The maximum dimension of the second end cap 42 in the vertical direction is smaller than the maximum dimension of the first end cap 41 in the vertical direction, and the maximum dimension of the second end cap 42 in the horizontal direction is smaller than the maximum dimension of the first end cap 41 in the horizontal direction. The smaller size of the second end cap 42 compared to the first end cap 41 facilitates removal of the second end cap 42 from the first end cap 41 by the user.

[0055] like Figures 12 to 13As shown, in this embodiment, the second end cap 42 is detachably connected to the first end cap 41 via a connector 46. The connector 46 can be a screw, a snap-fit, or a thread, etc. At least a portion of the second end cap 42 is located on the path of the striking assembly 20 disengaging from the cylinder assembly 30. When at least a portion of the second end cap 42 is not moved away from the first end cap 41, the first opening 411 is hidden, and the striking assembly 20 cannot disengage from the cylinder assembly 30. When at least a portion of the second end cap 42 is moved away from the first end cap 41, the first opening 411 is exposed to allow the striking assembly 20 to disengage from the cylinder assembly 30. That is, when the user does not remove the second end cap 42 from the first end cap 41, the striking assembly 20 cannot disengage from the cylinder assembly 30, and the user uses the nail gun 100 to drive a nail. When the user wants to replace the firing pin 21, the user removes the second end cap 42 from the first end cap 41, and the striking assembly 20 can disengage from the cylinder assembly 30. In this way, users can replace the firing pin 21 simply by removing the second end cap 42, which is convenient and quick.

[0056] The nail gun 100 includes a nail holder 50. A guide rail 51 is provided on the nail holder 50, extending along a first straight line 101. The guide rail 51 engages with a firing pin 21 to guide the firing pin 21 along the first straight line 101. A second end cap 42 supports at least a portion of the nail holder 50. At least a portion of the nail holder 50 is mounted on the second end cap 42 via a connector 46, such as a screw. Thus, the nail holder 50 is fixedly connected to the second end cap 42. When the second end cap 42 moves away from the first end cap 41, the nail holder 50 moves with the second end cap 42 in the same direction. The nail holder 50 is located on the path of the striking assembly 20 disengaging from the cylinder assembly 30. The nail holder 50 is fixedly connected to the second end cap 42, so that when the user removes the second end cap 42, the nail holder 50 is also removed, facilitating quick replacement of the firing pin 21 and rapid reinstallation of the removed parts.

[0057] The magazine 12 supports at least a portion of the pin carrier 50. The pin carrier 50 is mounted on the magazine 12 via a connector 46, such as a screw. When the second end cap 42 moves away from the first end cap 41, the magazine 12 moves accordingly. The magazine 12 is positioned along the path of the striking assembly 20 disengaging from the cylinder assembly 30. The magazine 12 is fixedly connected to the pin carrier 50, i.e., fixedly connected to the second end cap 42. Thus, when the user removes the second end cap 42, the pin carrier 50 and the magazine 12 are also removed, facilitating quick replacement of the firing pin 21 and rapid reinstallation of the removed parts.

[0058] In some embodiments, the nail holder 50 is integrally formed with the second end cap 42 in this embodiment, and the nail holder 50 and the second end cap 42 in this embodiment are regarded as a whole as the second end cap 42. In some embodiments, the nail holder 50 itself can be regarded as the second end cap 42. In some embodiments, the magazine 12 itself can be regarded as the second end cap 42. As long as the second end cap 42 is connected to the first opening 411, and the striking component 20 can be disengaged from the cylinder assembly 30 when the user removes the second end cap 42 from the first end cap 41, the form of the second end cap 42 is not limited here.

[0059] like Figures 8 to 11 As shown, the second end cap 42 has a second opening 421 for the firing pin 21 to pass through. The second opening 421 is located at the front end of the second end cap 42. The center of the cross-section of the second opening 421 is substantially located on the first straight line 101. The diameter of the second opening 421 is smaller than the diameter of the first piston 22. Thus, when the second end cap 42 is not removed, the second opening 421 prevents the user from removing the firing pin 21 along with the first piston 22 from the second opening 421. The first end cap 41 includes a first centering portion 49a that defines the first opening 411. The first centering portion 49a is substantially cylindrical. The second end cap 42 includes a second centering portion 49b. The second centering portion 49b is a hollow cylinder and extends rearward from the second end cap 42 into the first centering portion 49a. This facilitates that the centers of the first end cap 41 and the second end cap 42 are both located on the first straight line 101 during assembly. Figure 7 As shown, on the cross-section BB, the cross-sections of the first centering part 49a, the second centering part 49b and the first cylinder 311 are all circular, and the center of the circle is basically on the first straight line 101. The centering effect is good, the striking assembly 20 will not shake, and the parts are assembled stably.

[0060] like Figure 4 and Figure 13As shown, the nail gun 100 also includes a depth adjustment device 60, which adjusts the stroke length of the first piston 22 within the first cylinder 311. The depth adjustment device 60 includes a buffer 61, an intermediate part 62, and an operating part 63. The operating part 63 is operated by the user to adjust the nailing depth of the nail gun 100. The second end cap 42 includes an adjustment part 47, which is an arc-shaped groove. The operating part 63 is a hollow cylinder extending in the front-rear direction. Anti-slip textures are provided on the circumferential surface of the cylinder to increase the friction between the user's fingers and the operating part 63. The second end cap 42 includes a fourth receiving part 48. The operating part 63 is rotatably mounted to the adjustment part 47 and abuts against the fourth receiving part 48. When the user rotates the operating part 63, the circumferential surface of the operating part 63 moves along the arc-shaped groove of the adjustment part 47, and the position of the operating part 63 in the front-rear direction remains unchanged. Threads are formed on the inner ring of the operating part 63. An intermediate component 62 is located between a buffer component 61 and an operating component 63. The end of the intermediate component 62 near the operating component 63 is threaded to engage with the operating component 63, and the end of the intermediate component 62 near the buffer component 61 is fixedly connected to the buffer component 61. At least a portion of the intermediate component 62 and at least a portion of the buffer component 61 are slidably accommodated within a fourth receiving portion 48, and at least a portion of the intermediate component 62 and at least a portion of the buffer component 61 are accommodated at the front end of the first chamber 313. When the user rotates the operating component 63, the operating component 63 rotates substantially around a first straight line 101 in place. The intermediate component 62 engages with the operating component 63 threadedly, thus the operating component 63 drives the intermediate component 62 and the buffer component 61 to move. The rotational motion of the operating component 63 is converted into axial movement of the intermediate component 62 and the buffer component 61 along the first chamber 313. The buffer component 61 can be a rubber pad or any cushioning material. When the first piston 22 moves to the front end of the first chamber 313, it abuts against the buffer 61, which prevents the first piston 22 from moving forward. When the position of the buffer 61 changes, the ending position of the reciprocating motion of the first piston 22 changes, thus limiting the length of the reciprocating stroke of the first piston 22 within the first chamber 313, thereby changing the nailing depth of the nail gun 100. By converting the rotational motion of the operating member 63 into the axial motion of the buffer 61, the nail gun 100 has a compact structure, an attractive appearance, and is convenient for user operation.

[0061] like Figure 5As shown, the nail holder 50 includes a stop portion 52 that extends substantially in the vertical direction. When the nail holder 50 is installed to the second end cap portion 42, the stop portion 52 completely blocks the second opening 421, making the fourth receiving portion 48 a relatively enclosed space, making it difficult for gas to escape from the fourth receiving portion 48 forward and upward. The nail holder 50 includes an upper nail holder 53 and a lower nail holder 54. The upper nail holder 53 is positioned above the firing pin 21, and the lower nail holder 54 is positioned below the firing pin 21. The rear ends of the upper nail holder 53 and the lower nail holder 54 together form the stop portion 52. The end cap includes a vent. The first end cap portion 41 includes a first vent 412, and the second end cap portion 42 includes a second vent 422. The first vent 412 and the second vent 422 together form a vent. The second vent 422 includes a recess 422a and a second end face 422b that extends substantially in the vertical direction. The second end face 422b abuts against the lower nail holder 54, and the recess 422a is located inside the second end face 422b and is recessed downward. The second vent 422 includes one or more vent holes 422c, which are at least partially formed in the recess 422a, so that the fourth receiving portion 48 communicates with the second vent 422 through the one or more vent holes 422c. The first vent 412 opens upward and includes a first end face 412a that extends substantially in the vertical direction. The first end face 412a is located outside the first vent 412 and abuts against the second end face 422b. The first end face 412a and the second end face 422b are substantially arc-shaped, so that the first end face 412a and the second end face 422b fit together in shape, and the first end cap portion 41 and the second end cap portion 42 fit together more stably. The second vent 422 includes one or more vent holes 422c, and the first vent 412 opens upwards, thus communicating with the first vent 412. The first chamber 313, the fourth receiving portion 48, the second vent 422, the first vent 412, the first receiving portion 44, and the second chamber 314 are sequentially connected. Thus, when the first piston 22 moves toward the end cap 40, at least a portion of the air in the first chamber 313 flows to the second chamber 314, reducing the resistance to the first piston 22's movement toward the end cap 40. When the first piston 22 moves toward the end cap 40, that is, forward, some gas leaks out from the vent hole 316 to atmospheric pressure, and some gas flows to the second chamber 314 to assist the second piston 33 in backward movement. The faster the first piston 22 moves forward and the faster the second piston 33 moves backward, the less energy is lost, the higher air circulation efficiency is, and the nail-driving efficiency is improved.

[0062] like Figure 14As shown, the firing pin 21 includes a firing pin body 211 and a firing pin head 212. The firing pin head 212 is located at the end of the firing pin body 211 away from the first piston 22, and is detachably connected to the firing pin body 211. The firing pin head 212 and the firing pin body 211 are engaged by a dovetail groove or other means, so that when the firing pin head 212 is worn, the user can quickly replace the firing pin head 212.

[0063] The working principle of the dual-cylinder nail gun 100 in this embodiment is described below. The working principle of the dual-cylinder nail gun 100 in this embodiment is basically the same as that of existing dual-cylinder nail guns 100, the difference being that the air supply port of the nail gun 100 in this embodiment is located on the first cylinder, and the air supply port is an air supply groove 318. For ease of reading, only the differences between this embodiment and the prior art are described below.

[0064] like Figures 4 to 7 As shown, the first piston 22 includes a first sealing ring 221, and the second piston 33 includes a second sealing ring 331. The first sealing ring 221 and the second sealing ring 331 can respectively fit tightly against the first cylinder body 311 and the second cylinder body 312, so that the first chamber 313 and the second chamber 314 can be separated into sealed spaces. The rear end of the first cylinder is magnetically engaged with the rear end of the first piston 22. An air supply groove 318 is provided on the first cylinder. When the second sealing ring 331 is located in front of the air supply groove 318, atmospheric air communicates with the second chamber 314 through the gap in the housing 11. The first piston 22 is attracted to the end of the first cylinder. Figure 4 and Figure 6 As shown, connecting rod 143 drives the second piston 33 to move backward, at which time the sealing ring is passing over the air supply groove 318. When the sealing ring passes over the air supply groove 318, the atmospheric pressure behind the second chamber 314 gradually increases as the second piston 33 moves backward. The cylinder includes a rear passage. The atmospheric pressure behind the second piston 33 is applied to the rear of the first piston 22 through the rear passage. When the atmospheric pressure behind the second piston 33 is greater than or equal to the magnetic force between the end of the first piston 22 and the end of the first cylinder, the first piston 22 moves forward, and part of the gas in front of the first piston 22 is discharged to the front of the second piston 33, while part of the gas in front of the first piston 22 is discharged to the atmosphere. Figure 5As shown, the first piston 22 passes the vent 316, and the gas behind the first piston 22, along with the gas behind the second piston 33, is discharged to the atmosphere. When the first piston 22 moves to its most movable foremost position and the second piston 33 moves to its most movable rearmost position, the nail gun 100 drives the nail. Afterwards, the connecting rod 143 drives the second piston 33 forward. Because the one-way valve 317 prevents gas from entering the first chamber 313 from the atmosphere, negative pressure exists behind the first piston 22 and the second piston 33. The first piston 22 moves backward until its end engages with the end of the first cylinder through magnetic force. When the second sealing ring 331 moves forward with the second piston 33 and passes the air supply groove 318 again, the gas in the atmosphere re-enters the cylinder. When the second sealing ring 331 is again in front of the air supply groove 318, one cycle is completed.

[0065] The above embodiments merely illustrate the basic principles and characteristics of this application. This application is not limited to the above embodiments. Various changes and modifications can be made to this application without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A nail gun, comprising: The striking assembly includes a striker configured to strike a fastener and a first piston on which the striker is mounted; A cylinder assembly includes a cylinder body, a second piston, and an end cap, wherein the cylinder body is formed with a chamber configured to accommodate the first piston and the second piston, and the end cap is connected to the front end of the cylinder body; A housing is configured to support the cylinder assembly; The motor is housed within the casing; A transmission assembly is configured to drive the second piston to move within the cylinder. Its features are, The end cap includes: The first end cap portion is connected to the housing and includes a support portion that supports the transmission assembly; The second end cap is movably connected to the first end cap. The first end cap portion is provided with a first opening, and the second end cap portion is connected to the first opening; When at least a portion of the second end cap moves toward a direction away from the first end cap, the first opening is exposed to allow the striking component to disengage from the cylinder assembly.

2. The nail gun of claim 1, wherein, The nail gun includes a connector that detachably connects the second end cap to the first end cap.

3. The nail gun according to claim 1, characterized in that, The nail gun includes a nail holder that guides the firing pin along a first straight line, and a second end cap that supports at least a portion of the nail holder. When at least a portion of the second end cap moves toward a direction away from the first end cap, the nail holder moves with at least a portion of the second end cap toward a direction away from the first end cap.

4. The nail gun according to claim 3, characterized in that, The nail gun includes a magazine that houses the fastener, the magazine supporting at least a portion of the nail holder, and the magazine moving with at least a portion of the second end cap in a direction away from the first end cap as the second end cap moves away from the first end cap.

5. The nail gun according to claim 1, characterized in that, The firing pin moves along a substantially first straight line, the cross-section of the first opening is substantially circular, the cross-section of the first piston is substantially circular, and the center of the cross-section of the first piston and the center of the cross-section of the first opening are substantially located on the first straight line.

6. The nail gun according to claim 5, characterized in that, The second end cap is provided with a second opening, the cross-section of the second opening is basically circular, and the center of the cross-section of the second opening is basically located on the first straight line.

7. The nail gun according to claim 1, characterized in that, The chamber includes a first chamber for the reciprocating motion of the first piston and a second chamber for the reciprocating motion of the second piston.

8. The nail gun according to claim 7, characterized in that, The end cap includes a vent, a first chamber, and the vent and a second chamber are sequentially connected so that when the first piston moves toward the end cap, at least a portion of the air in the first chamber flows to the second chamber.

9. The nail gun according to claim 7, characterized in that, The nail gun includes a depth adjustment device configured to adjust the stroke length of the first piston. The depth adjustment device includes a buffer and an operating member. When the operating member rotates, the buffer moves axially along the first chamber.

10. The nail gun according to claim 8, characterized in that, The first end cap includes a first vent, and the second end cap includes a second vent, the first vent and the second vent together constituting the vent.

11. The nail gun according to claim 1, characterized in that, The firing pin includes a firing pin body and a firing pin head, the firing pin head being located at the end of the firing pin body away from the first piston, and the firing pin head being detachably connected to the firing pin body.

12. The nail gun according to claim 1, characterized in that, At least a portion of the second end cap, at least a portion of the first end cap, and at least a portion of the transmission assembly are arranged sequentially from top to bottom.

13. The nail gun according to claim 1, characterized in that, The first end cap includes a first receiving portion that accommodates at least a portion of the transmission assembly.

14. The nail gun according to claim 1, characterized in that, The maximum dimension of the second end cap in the vertical direction is smaller than the maximum dimension of the first end cap in the vertical direction.

15. A nail gun, comprising: The striking assembly includes a striker configured to strike a fastener and a first piston on which the striker is mounted; A cylinder assembly includes a cylinder body, a second piston, and an end cap, wherein the cylinder body is formed with a chamber configured to accommodate the first piston and the second piston, and the end cap is connected to the front end of the cylinder body; A housing is configured to support the cylinder assembly; Its features are, The end cap includes: The first end cap is connected to the housing. The second end cap is movably connected to the first end cap. The first end cap portion is provided with a first opening, and the second end cap portion is connected to the first opening; When at least a portion of the second end cap moves toward a direction away from the first end cap, the first opening is exposed to allow the striking component to disengage from the cylinder assembly.

16. A nail gun, comprising: The striking assembly includes a striker configured to strike a fastener and a first piston on which the striker is mounted; A cylinder assembly includes a cylinder body, a second piston, and an end cap, wherein the cylinder body is formed with a chamber configured to accommodate the first piston and the second piston, and the end cap is connected to the front end of the cylinder body; A transmission assembly is configured to drive the second piston to move within the cylinder. Its features are, The end cap includes: The first end cap supports the transmission assembly; The second end cap is movably connected to the first end cap. The first end cap portion is provided with a first opening, and the second end cap portion is connected to the first opening; When at least a portion of the second end cap moves toward a direction away from the first end cap, the first opening is exposed to allow the striking component to disengage from the cylinder assembly.

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