Nail gun

Abstract

The application discloses a nail gun. The nail gun comprises a shell, a cylinder assembly, a cartridge assembly and a firing assembly. The shell is formed with a containing space. The cylinder assembly is arranged at least partially in the shell. The cartridge assembly is used for storing nails. The firing assembly is used for striking nails and is arranged at least partially in the cylinder assembly. The cylinder assembly comprises a first cylinder and a second cylinder. The first cylinder comprises a first cylinder cavity extending along a first axis direction. The second cylinder is arranged at least partially in the first cylinder cavity. The nail gun further comprises a first piston arranged at least partially in the first cylinder cavity. The first piston is capable of reciprocating in the first cylinder cavity along the direction of the first axis. The first piston is arranged to form an air inlet gap with a part of the outer wall of the second cylinder. Air can pass through the air inlet gap and enter the first cylinder cavity. The nail gun provided by the application is simple in process and low in cost.

Description

Technical Field

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

[0002] A nail gun, as a nailing tool, uses impact force to drive a nail into the workpiece. Existing nail guns on the market can be categorized into mechanical and pneumatic types. Pneumatic nail guns, based on the number of cylinders, can be further divided into single-cylinder or double-cylinder structures. Current double-cylinder structures have complex manufacturing processes and higher costs. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this application is to provide a nail gun that is simple to manufacture and has a low cost.

[0004] To achieve the above objectives, this application adopts the following technical solution: This application provides a nail gun, comprising: a housing having a receiving space; a cylinder assembly at least partially disposed within the housing; a magazine assembly for storing nails; and a firing assembly for striking the nails and at least partially disposed within the cylinder assembly. The cylinder assembly includes a first cylinder and a second cylinder; the first cylinder includes a first cylinder cavity extending along a first axis, with at least a portion of the second cylinder disposed within the first cylinder cavity; the nail gun also includes a first piston, at least partially disposed within the first cylinder cavity, the first piston being capable of reciprocating within the first cylinder cavity along the first axis; the first piston is provided with an air intake channel, through which external gas outside the cylinder assembly can enter the first cylinder cavity; the air intake channel includes an air inlet, through which external gas can enter the air intake channel, the air inlet being disposed on the sidewall surface of the first piston.

[0005] In some embodiments, the intake passage further includes an exhaust port, through which gas in the intake passage can leave the intake passage and enter the first cylinder cavity.

[0006] In some embodiments, the air outlet and the air inlet are disposed on different walls of the first piston.

[0007] In some embodiments, the first piston is configured such that, when it reciprocates along a first axis, at least a portion of the intake passage can exit the first cylinder cavity, and the intake port can allow external gas to enter the intake passage through the intake port when it exits the first cylinder cavity.

[0008] In some embodiments, the air intake port can be closed by the inner wall of the first cylinder when it enters the first cylinder cavity, so as to prevent external gas from entering the intake passage through the air intake port.

[0009] In some embodiments, the air intake passage is configured as an L-shaped structure.

[0010] In some embodiments, the first piston is provided with at least two intake passages.

[0011] In some embodiments, all intake passages are symmetrically arranged around the second cylinder.

[0012] In some embodiments, the second cylinder includes a second cylinder cavity extending along a second axis, the first axis being parallel to the second axis; the firing assembly includes a second piston disposed within the second cylinder cavity, the second piston being capable of reciprocating within the second cylinder cavity along the second axis.

[0013] In some embodiments, the cylinder assembly further includes a connecting member for connecting a first cylinder chamber and a second cylinder chamber, through which gas in the first cylinder chamber can enter the second cylinder chamber.

[0014] In some embodiments, the first cylinder includes: a first end having a connecting member; and a second end disposed opposite to the first end, the second end being configured as an opening.

[0015] In some embodiments, the air outlet faces the connector.

[0016] In some embodiments, the air intake is oriented away from the first axis.

[0017] In some embodiments, the first piston is disposed within the first cylinder cavity.

[0018] In some embodiments, the cylinder assembly further includes a limiting member disposed at the second end, the limiting member being used to prevent at least a portion of the first piston from leaving the first cylinder cavity.

[0019] In some embodiments, the firing assembly further includes an insert capable of preventing external gas from entering the first cylinder cavity from the vent hole, a first insertion end of the insert being connected to a connecting member, and a second insertion end of the insert being capable of being inserted into the intake channel from the vent hole.

[0020] In some embodiments, the intake passage further includes a fixing groove disposed between the intake port and the outlet port; the first piston includes a rod seal, which is at least partially received in the fixing groove; the insert further includes a middle portion disposed between the first insertion end and the second insertion end, the middle portion being configured to fit tightly against the rod seal to prevent external gas from entering the first cylinder cavity from the intake passage.

[0021] In some embodiments, the diameter of the second insertion end is smaller than the diameter of the middle portion, and the second insertion end cannot be tightly fitted with the insert seal, thereby allowing external gas to enter the first cylinder cavity from the intake passage.

[0022] In some embodiments, the first cylinder includes a valve assembly, at least partially disposed in an intake passage, the valve assembly being capable of allowing and preventing external gas from entering the first cylinder cavity from the intake passage.

[0023] In some embodiments, the valve assembly is configured to prevent external gas from entering the first cylinder cavity from the intake passage when the first piston moves along the first axis toward the first end.

[0024] This application provides a nail gun, comprising: a housing having a receiving space; a cylinder assembly at least partially disposed within the housing; a magazine assembly for storing nails; and a firing assembly for striking the nails and at least partially disposed within the cylinder assembly. The cylinder assembly includes a first cylinder and a second cylinder; the first cylinder includes a first cylinder cavity extending along a first axis, with at least a portion of the second cylinder disposed within the first cylinder cavity; the nail gun also includes a first piston, with at least a portion of the first piston disposed within the first cylinder cavity, the first piston being capable of reciprocating within the first cylinder cavity along the first axis; the first piston is configured to form an intake gap with a portion of the outer wall of the second cylinder, allowing gas to pass through the intake gap and enter the first cylinder cavity.

[0025] In some embodiments, the nail gun further includes a first seal, the outer side of which is attached to a first piston, and the inner side of which is attached to a portion of the outer wall of a second cylinder; the first piston can drive the first seal to move on the outer wall surface of the second cylinder; wherein a groove is provided on a portion of the outer wall surface of the second cylinder; the first cylinder is configured such that when the first seal is located in the groove, an air intake gap is formed between the first piston and the outer wall surface of the second cylinder, and gas can pass through the air intake gap.

[0026] In some embodiments, the first piston is provided with a first receiving groove for receiving a portion of the first seal.

[0027] In some embodiments, the firing assembly further includes a second seal, the inner side of which is in contact with the first piston, and the outer side of which is in contact with the inner wall of the first cylinder; the first piston is capable of driving the second seal to slide on the inner wall surface of the first cylinder; the first cylinder is configured such that when the first seal moves to the recessed position, the first seal and the outer wall surface of the second cylinder form a partial air intake gap.

[0028] In some embodiments, the first piston is provided with a second receiving groove for receiving a portion of the second seal.

[0029] In some embodiments, the first seal and / or the second seal is an O-ring.

[0030] In some embodiments, the first seal and / or the second seal is an X-shaped sealing ring.

[0031] In some embodiments, the second cylinder includes a second cylinder cavity extending along a second axis, the first axis being parallel to the second axis; the firing assembly includes a second piston disposed within the second cylinder cavity, the second piston being capable of reciprocating within the second cylinder cavity along the second axis.

[0032] In some embodiments, the groove depth is 1 mm to 5 mm.

[0033] In some embodiments, at least two grooves are provided on a portion of the outer wall surface of the second cylinder.

[0034] In some embodiments, all the grooves are arranged symmetrically around the second axis.

[0035] In some embodiments, when the first seal is located in the groove, the distance between the first seal and the outer wall surface of the second cylinder is greater than the minimum gap between the first piston and the outer wall surface of the second cylinder.

[0036] This application provides a nail gun, comprising: a housing having a receiving space; a cylinder assembly at least partially disposed within the housing; a magazine assembly for storing nails; and a firing assembly for striking nails and at least partially disposed within the cylinder assembly; characterized in that the cylinder assembly includes a first cylinder and a second cylinder; the first cylinder includes a first cylinder cavity extending along a first axis, and at least a portion of the second cylinder is disposed within the first cylinder cavity; the nail gun further includes: a first piston, at least a portion of which is disposed within the first cylinder cavity, the first piston being capable of reciprocating within the first cylinder cavity along the first axis; a first seal, the outer side of which abuts against the first piston, and the inner side of which abuts against a portion of the outer wall of the second cylinder; the first piston being capable of moving the first seal on the outer wall surface of the second cylinder; wherein the distance between the first seal and the outer wall surface of the second cylinder is different.

[0037] In some embodiments, in the radial direction, the distance between the first seal and a portion of the outer wall surface of the second cylinder is 0, and the distance between the first seal and a portion of the outer wall surface of the second cylinder is greater than 0.

[0038] In some embodiments, a groove is provided on a portion of the outer wall surface of the second cylinder in the radial direction, and the distance between the first seal and the groove of the second cylinder is greater than 0.

[0039] This application provides a nail gun, comprising: a housing having a receiving space; a cylinder assembly at least partially disposed within the housing; a magazine assembly for storing nails; and a firing assembly for striking the nails and at least partially disposed within the cylinder assembly. The cylinder assembly includes a first cylinder and a second cylinder; the first cylinder includes a first cylinder cavity extending along a first axis, with at least a portion of the second cylinder disposed within the first cylinder cavity; the first cylinder includes: a first rear cylinder body; and a first front cylinder body, the inner diameter of the first front cylinder body being larger than the inner diameter of the first rear cylinder body; the first cylinder cavity extends along the first axis, with at least a portion of the second cylinder disposed within the first cylinder cavity, the first cylinder cavity including the cavity of the first rear cylinder body and the cavity of the first front cylinder body; the nail gun also includes a first piston, with at least a portion of the first piston disposed within the first cylinder cavity. Within the first cylinder cavity, the first piston can reciprocate along the first axis within the first cylinder cavity; the firing assembly includes a second seal, the inner side of which is in contact with the first piston, and the outer side of which is in contact with the inner wall of the first rear cylinder; the first cylinder is configured such that when the second seal is located in the cavity of the first front cylinder, the first piston and the inner wall surface of the first rear cylinder form an intake gap, allowing gas to pass through the intake gap; when the second seal is located in the cavity of the first rear cylinder, the second seal abuts against the inner wall surface of the first rear cylinder.

[0040] In some embodiments, when the second seal is located in the cavity of the first front cylinder, the gap between the second seal and the inner wall surface of the first front cylinder is greater than the gap between the first piston and the inner wall surface of the first rear cylinder.

[0041] In some embodiments, the housing is formed with a mounting base for mounting a cylinder assembly, wherein the mounting base includes an air inlet opening through which external gas outside the cylinder assembly can enter the housing and pass through an air inlet gap into the first rear cylinder.

[0042] In some embodiments, the first piston is provided with a second receiving groove for receiving a portion of the second seal.

[0043] In some embodiments, the first cylinder further includes a first seal, the outer side of which is attached to the first piston, and the inner side of which is attached to a portion of the outer wall of the second cylinder. The first piston is capable of driving the first seal to slide on the outer wall surface of the first front cylinder.

[0044] In some embodiments, the first piston is provided with a first receiving groove for receiving a portion of the first seal.

[0045] In some embodiments, the first seal and / or the second seal is an O-ring.

[0046] In some embodiments, the first seal and / or the second seal is an X-shaped sealing ring.

[0047] In some embodiments, the difference between the inner diameters of the first front cylinder and the first rear cylinder ranges from 0.5 mm to 15 mm.

[0048] In some embodiments, the length of the first front cylinder block ranges from 25 mm to 70 mm.

[0049] In some embodiments, the length of the first rear cylinder ranges from 55 mm to 80 mm.

[0050] This application provides a nail gun, comprising: a housing having a receiving space; a cylinder assembly at least partially disposed within the housing; a magazine assembly for storing nails; and a firing assembly for striking the nails and at least partially disposed within the cylinder assembly. The cylinder assembly includes a first cylinder and a second cylinder; the first cylinder includes a first cylinder cavity extending along a first axis, with at least a portion of the second cylinder disposed within the first cylinder cavity; the first cylinder includes a first rear cylinder body and a first front cylinder body, the inner diameter of the first front cylinder body being larger than the inner diameter of the first rear cylinder body; the first cylinder cavity extends along the first axis, with at least a portion of the second cylinder disposed within the first cylinder cavity, the first cylinder cavity including the cavity of the first rear cylinder body and the cavity of the first front cylinder body; the nail gun also includes a first piston, at least a portion of which is disposed within the first cylinder cavity, the first piston being capable of reciprocating within the first cylinder cavity along the first axis; the firing assembly includes a second seal, the inner side of which is abutted against the first piston, and the outer side of which is capable of abutting against the inner wall of the first rear cylinder body; the first cylinder is configured such that when the second seal is located within the cavity of the first front cylinder body, the gap between the second seal and the inner wall surface of the first front cylinder body is greater than the gap between the first piston and the inner wall surface of the first rear cylinder body. The advantages of this application are: the cylinder assembly of the nail gun provided by this application does not require drilling holes in the external cylinder, which enhances the structural strength of the external cylinder, saves the cost of drilling, and avoids the possibility of the hole becoming blocked. Attached Figure Description

[0051] Figure 1 This is a perspective view of a nail gun provided in one embodiment of this application; Figure 2 yes Figure 1 A 3D view of a nail gun after part of its casing has been removed; Figure 3 yes Figure 1 A cross-sectional view of a nail gun from one perspective; Figure 4 yes Figure 3 A magnified view of a portion of region A; Figure 5 yes Figure 4 A magnified view of a portion of region B; Figure 6This is a perspective view of a partial structure of a nail gun provided in one embodiment of this application; Figure 7 yes Figure 6 A cross-sectional view of a portion of the structure of a nail gun from one perspective; Figure 8 yes Figure 6 A magnified view of a portion of region C; Figure 9 This is a cross-sectional view of a partial structure of a nail gun provided in one embodiment of this application; Figure 10 yes Figure 9 A magnified view of a portion of region D; Figure 11 This is a cross-sectional view of a partial structure of a nail gun provided in one embodiment of this application; Figure 12 yes Figure 11 A magnified view of a portion of region E; Figure 13 This is a cross-sectional view of a partial structure of a nail gun provided in one embodiment of this application; Figure 14 yes Figure 13 A magnified view of a portion of region F; Figure 15 yes Figure 14 A magnified view of a portion of region G; Figure 16 This is a perspective view of a partial structure of a nail gun provided in one embodiment of this application; Figure 17 yes Figure 16 A cross-sectional view of a portion of the structure of a nail gun from one perspective; Figure 18 yes Figure 17 A magnified view of a portion of region H; Figure 19 yes Figure 18 A magnified view of a portion of region I. Detailed Implementation

[0052] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the application. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present application and not all structures or steps.

[0053] Figure 1 The nail gun 10 shown is a specific embodiment of this application. In this specification, the directions front, back, left, right, up, and down are described as follows: Figure 1 The directions shown are as follows. Specifically, when the user operates the nail gun 10, the direction in which the nails are fired is defined as forward, and the extension direction of the magazine assembly is defined as up and down.

[0054] Reference Figures 1 to 3 As shown, the nail gun 10 includes: a housing 11, a power output assembly 12, a cylinder assembly 13, a magazine assembly 14, and a firing assembly 15.

[0055] The housing 11 has a first receiving space 111 and a second receiving space 112. The cylinder assembly 13 is disposed in the first receiving space 111, and the power output assembly 12 is disposed in the second receiving space 112. The housing 11 also has a handle 113 for the user to grip. One end of the handle 113 is connected to a power interface for connecting to a DC or AC power source, such as a DC battery pack (not shown). A main switch 114 is provided on the handle 113, which allows the user to control the start and stop of the nail gun 100. In this embodiment, the housing 11 also has a mounting base 115 for mounting the cylinder assembly 13, and the mounting base 115 is disposed at the other end of the handle 113 connected to the power interface.

[0056] The power output assembly 12 includes a prime mover 121 and a transmission device 122. In this embodiment, the prime mover 121 is specifically an electric motor. The transmission device 122 is disposed between the prime mover 121 and the cylinder assembly 13. The transmission device 122 may specifically include a reduction gear assembly and a connecting rod assembly. The reduction gear assembly may specifically include a multi-stage planetary gear train, and the connecting rod assembly includes a drive rod 1221 for outputting power.

[0057] like Figures 3 to 5 As shown, cylinder assembly 13 is disposed within first receiving space 111, and cylinder assembly 13 includes a first cylinder 131 and a second cylinder 132. A portion or all of the second cylinder 132 is disposed within the first cylinder 131. The first cylinder 131 includes a first cylinder cavity 1310 extending along a first axis 101, and a portion or all of the second cylinder 132 is disposed within the first cylinder cavity 1310. The second cylinder 132 includes a second cylinder cavity 1320 extending along a second axis 102, the first axis 101 and the second axis 102 being parallel. In some embodiments, cylinder assembly 13 further includes a connecting member 133 for connecting the first cylinder cavity 1310 and the second cylinder cavity 1320, allowing gas from the first cylinder cavity 1310 to enter the second cylinder cavity 1320 through the connecting member 133. The first cylinder 131 includes a first end 1311 and a second end 1312 disposed opposite to each other. The first end 1311 is provided with a connecting member 133, and the second end 1312 is provided with a first cylinder opening 1313.

[0058] The magazine assembly 14 is positioned along the third axis 103, which is perpendicular to the first axis 101. The magazine assembly 14 is used to receive the nail and connect to the firing assembly 15.

[0059] The firing assembly 15 is disposed within the cylinder assembly 13. The firing assembly 15 includes a first piston 151, a second piston 152, and a firing pin 153. Part or all of the first piston 151 is disposed within the first cylinder chamber 1310. The second piston 152 is disposed within the second cylinder chamber 320. One end of the drive rod 1221 is connected to the first piston 151 and, under the rotation of the prime mover 121, pushes the first piston 151 to reciprocate along the first axis 101 within the first cylinder chamber 1310. The second piston 152 is capable of reciprocating along the second axis 102 within the second cylinder chamber 1320. The firing pin 153 and the second piston 152 are fixedly connected, and the second piston 152, connected to the firing pin 153, reciprocates along the second axis 102 within the second cylinder chamber 1320. When the user loads a nail into the magazine assembly 14, the second piston 152 pushes the firing pin 153 to fire the nail. The firing assembly 15 also includes an iron plate 154 and a magnet 155. The iron plate 154 is disposed on the side of the second piston 152 facing the connecting member 133, and the magnet 155 is disposed on the side of the connecting member 133 facing the second piston 152. The iron plate 154 and the magnet 155 attract each other to fix the second piston 152. In other embodiments, the magnet 155 may be disposed on the side of the second piston 152 facing the connecting member 133, and the iron plate 154 may be disposed on the side of the connecting member 133 facing the second piston 152.

[0060] like Figures 3 to 5 As shown, this application provides an embodiment of a cylinder assembly. When the drive rod 1221 pushes the first piston 151 to move from front to back within the first cylinder chamber 1310 along the direction of the first axis 101, the gas in the first cylinder chamber 1310 enters the second cylinder chamber 1320 through the connecting member 133. As the first piston 151 gradually approaches the connecting member 133, the air pressure on the second piston 152 gradually increases. When the air pressure on the second piston 152 reaches a predetermined threshold, the second piston 152 is released from the attraction of the magnet 155 and moves from back to front under the action of air pressure, thereby pushing the firing pin 153 forward to strike the nail.

[0061] The surface of the second cylinder 132 may be provided with a second cylinder bore 1321. When the second piston 152 moves forward under the push of air pressure until it passes the second cylinder bore 1321, gas can leave the second cylinder cavity 1320 through the second cylinder bore 1321. After the second piston 152 passes the second cylinder bore 1321, the first piston 151 can move from back to front under the push of the drive rod 1221, while the second piston 152 is driven to move from front to back by air pressure. The surface of the first cylinder 131 may be provided with a first cylinder bore 1314. When the first piston 151 passes the first cylinder bore 1311, external gas can enter the first cylinder cavity 1310 through the first cylinder bore 1314. After external gas enters the first cylinder chamber 1310, the first piston 151 can move from front to back within the first cylinder chamber 1310 under the push of the drive rod 1221. At the same time, the air pressure pushes the second piston 152 to break away from the attraction of the magnet 155 and move from back to front, thereby pushing the firing pin 153 forward to strike the nail. Through the above cycle, the nail gun 10 can continuously fire nails.

[0062] In the above embodiment, the cylinder assembly 13 achieves gas flow by drilling holes in the surface of the first cylinder 131. This solution requires drilling holes in the formed cylinder, which not only reduces the structural strength of the cylinder but also increases the cost, and the holes may become clogged during user operation.

[0063] This application provides several technical solutions that can solve the technical problems existing in the first cylinder 131 in the first embodiment described above. These solutions eliminate the need for drilling holes in the first cylinder 131, thereby enhancing the structural strength of the cylinder, saving drilling costs, and preventing the possibility of hole blockage.

[0064] like Figures 6 to 8 As shown, as a second embodiment of the cylinder assembly, this application provides a combination of a cylinder assembly 23 and a firing assembly 25. For ease of description, this embodiment mainly describes the differences from the previous embodiment, and components that are the same as or similar to those in the above embodiment are referred to by the same reference numerals. Parts in the above embodiments that are compatible with this embodiment can be applied to this embodiment.

[0065] The cylinder assembly 23 is mounted on the mounting base 215, and the striking pin 253 is partially disposed within the cylinder assembly 23. The cylinder assembly 23 includes a first cylinder 231 and a second cylinder 232. A portion of the second cylinder 232 is disposed within the first cylinder 231, and the second cylinder 232 also includes a protruding portion 2321 protruding from the first cylinder cavity 2310. The first receiving space includes a third receiving space 2113 that receives the protruding portion 2321. The third receiving space 2113 is a part of the first receiving space, and the third receiving space 2113 is connected to the first cylinder cavity 2310 through the first cylinder opening 2313, and the third receiving space 2113 is open to the outside atmosphere. At least a portion of the first piston 251 can reciprocate within the first cylinder cavity 2310 and the third receiving space 2113.

[0066] The first piston 251 is provided with an intake passage 2510, through which external gas from outside the cylinder assembly 23 can enter the first cylinder cavity 2310. In some embodiments, the first piston 251 may be provided with two or more intake passages 2510, and all intake passages 2510 may be symmetrically arranged around the second cylinder 232, that is, symmetrically arranged around the second axis.

[0067] The intake passage 2510 includes an intake port 2511 and an exhaust port 2512. The intake port 2511 is located near the second end 2312 of the first cylinder 231, and the exhaust port 2512 is also located near the second end 2312. Figure 8 As shown, the air inlet 2511 is disposed on the side wall surface of the first piston 251, which refers to the two side walls of the first piston 251 along the direction perpendicular to the first axis 201. External gas can enter the intake passage 2510 through the air inlet 2511. Gas in the intake passage 2510 can exit the intake passage 2510 through the air outlet 2512 and enter the first cylinder chamber 2310. When the first piston 251 reciprocates within the first cylinder chamber 2310 along the direction of the first axis 201, the air inlet 2511 can enter the third receiving space 2113. At this time, gas in the third receiving space 2113 enters the intake passage 2510 through the air inlet 2511 and enters the first cylinder chamber 2310 through the air outlet 2512. When the first piston 251 leaves the third receiving space 2113 and enters the first cylinder cavity 2310, the air inlet 2511 can be covered and closed by the inner wall of the first cylinder 231, thereby preventing gas from entering the intake passage 2510 through the air inlet 2511. In some embodiments, the intake passage 2510 is specifically configured as an L-shaped structure, with the air inlet 2511 facing the inner wall of the first cylinder 231, that is, the orientation of the air inlet 2511 is away from the first axis 201, and the air outlet 2512 facing the connecting member 233.

[0068] In some embodiments, the inner diameter of the first cylinder 231 is 50 mm to 100 mm, preferably 55 mm, 60 mm, 90 mm, 93 mm, or 95 mm. In some embodiments, the length of the first cylinder 231 is 80 mm to 120 mm, preferably 82 mm, 85 mm, 90 mm, 111 mm, or 115 mm.

[0069] In some embodiments, the inner diameter of the second cylinder 232 is 20 mm to 50 mm, preferably 23 mm, 30 mm, 40 mm, 43 mm, or 45 mm. In some embodiments, the length of the second cylinder 232 is 80 mm to 150 mm, preferably 85 mm, 90 mm, 96 mm, 120 mm, 132 mm, or 140 mm.

[0070] like Figures 9 to 10 As shown, as an optional third embodiment of the cylinder assembly, this application provides a combination of a cylinder assembly 33 and a firing assembly 35. For ease of description, this embodiment mainly describes the differences from the previous embodiment, and components that are the same as or similar to those in the above embodiments are referred to by the same reference numerals. Parts in the above embodiments that are compatible with this embodiment can also be applied to this embodiment.

[0071] The cylinder assembly 33 includes a first cylinder 331, a second cylinder 332, a connecting member 333, and a limiting member 334. The limiting member 334 is disposed at the second end 3312 of the first cylinder 331, and the limiting member 334 can block part of the opening 2313 of the first cylinder, thereby preventing the first piston 351 from partially or completely leaving the first cylinder cavity 3310. The limiting member 334 is provided with a vent hole 3340, thereby allowing gas in the third receiving space 3113 to enter the first cylinder cavity 3310 through the vent hole 3340.

[0072] The first piston 351 includes a rod seal 3514. The intake passage 3510 also includes a retaining groove 3513, which is capable of accommodating at least a portion of the rod seal 3514, and the retaining groove 3513 is disposed between the intake port 3511 and the outlet port 3512.

[0073] The firing assembly 35 also includes an insert 356, which prevents gas from entering the first cylinder cavity 3310 from the exhaust port 3512. A first insertion end 3561 of the insert 356 connects to a connecting member 333; specifically, the first insertion end 3561 can be configured to insert into the connecting member 333. A second insertion end 3562 of the insert 356 can be inserted into the intake passage 3510 from the exhaust port 3512, thereby blocking the intake passage 3510 and preventing gas from entering the first cylinder cavity 3310 from the exhaust port 3512. The insert 356 also includes a middle portion 3563, which is disposed between the first insertion end 3561 and the second insertion end 3562. The middle portion 3563 is configured to fit tightly against the insert rod seal 3514 to prevent gas from entering the first cylinder cavity 3310 from the intake passage 3510.

[0074] In some embodiments, the diameter of the second insertion end 3562 is smaller than the diameter of the middle portion 3563, and the second insertion end 3562 and the insert rod seal 3514 cannot be tightly fitted, thereby allowing gas to enter the first cylinder cavity 3310 from the intake passage 3510. The diameter of the exhaust port 3512 can be greater than or equal to the diameter of the middle portion 3563. When the first piston 351 reciprocates within the first cylinder cavity 3310 along the direction of the first axis 301, the insertion member 356, which is fixedly connected to the connecting member 333, also moves relative to the insert rod seal 3514. When the second insertion end 3562 is inserted into the insert rod seal 3514, a gap that allows gas to pass through can be formed between the second insertion end 3562 and the insert rod seal 3514. When the middle portion 3563 is inserted into the insert rod seal 3514, the middle portion 3563 and the insert rod seal 3514 are tightly fitted, making it difficult for gas to pass through.

[0075] like Figures 11 to 12 As shown, as an optional fourth embodiment of the cylinder assembly, this application provides a combination of a cylinder assembly 43 and a firing assembly 45. For ease of description, this embodiment mainly describes the differences from the previous embodiment, and components that are the same as or similar to those in the above embodiments are referred to by the same reference numerals. Parts in the above embodiments that are compatible with this embodiment can be applied to this embodiment.

[0076] The firing assembly 45 includes a valve assembly 457 disposed within the intake passage 4510. The valve assembly 457 allows and prevents gas from entering the first cylinder chamber 4310 from the intake passage 4510. Specifically, when the first piston 451 moves from rear to front within the first cylinder chamber 4310 along the first axis 401 to a first preset position (not shown in the figure), the valve assembly 457 opens, allowing gas to enter the first cylinder chamber 4310 from the intake passage 4510. When the first piston 451 moves from a second preset position (not shown in the figure) within the first cylinder chamber 4310 from front to back along the first axis 401, the valve assembly 457 closes, preventing gas from entering the first cylinder chamber 4310 from the intake passage 4510.

[0077] In some specific embodiments, the valve assembly 457 includes a valve body 4571, an elastic element 4572, and a switching element 4573. The elastic element 4572 is disposed within the valve body 4571 and abuts against the first switching end 4573a of the switching element 4573. Specifically, the elastic element 4572 can be a spring. The first switching end 4573a of the switching element 4573 is disposed within the valve body 4571, and the second switching end 4573b is fixedly connected to the limiting member 334. The valve body 4571 includes a first opening 4571a and a second opening 4571b. The first opening 4571a is near the air inlet 4511, and the second opening 4571b is near the air outlet 4512. The first switching end 4573a can close the first opening 4571a under the pressure of the elastic element 4572 to prevent gas from entering the valve body 4571 from the first opening 4571a.

[0078] like Figures 13 to 15 As shown, as an optional fifth embodiment of the cylinder assembly, this application provides a combination of a cylinder assembly 53 and a firing assembly 55. For ease of description, this embodiment mainly describes the differences from the previous embodiment, and components that are the same as or similar to those in the above embodiments are referred to by the same reference numerals. Parts in the above embodiments that are compatible with this embodiment can be applied to this embodiment.

[0079] The firing assembly 55 includes a first seal 558 and a second seal 559. The first seal 558 surrounds the outer wall of the second cylinder 532, with its outer side conforming to the first piston 551 and its inner side conforming to a portion of the outer wall of the second cylinder 532. The first piston 551 can move the first seal 558 across the outer wall surface of the second cylinder 532. Understandably, the outer wall surface for sliding of the first piston 551 and the first seal 558 is a cylindrical outer wall of the second cylinder 532 along its length. The second seal 559 surrounds the outer wall of the first piston 551, with its inner side conforming to the first piston 551 and its outer side conforming to the inner wall of the first cylinder 531. The first piston 551 can move the second seal 559 across the inner wall surface of the first cylinder 531.

[0080] The first piston 551 is provided with a first receiving groove 5518 and a second receiving groove 5519. The first receiving groove 5518 is used to receive at least a portion of the first seal 558, and the opening of the first receiving groove 5518 faces the inner wall of the first cylinder 531. The second receiving groove 5519 is used to receive at least a portion of the second seal 559, and the opening of the second receiving groove 5519 faces the outer wall of the second cylinder 532.

[0081] A groove 5321 is provided on a portion of the outer wall surface of the second cylinder 532. When the first piston 551 moves the first seal 558 to the position of the groove 5321, the presence of the groove 5321 prevents the first seal 558 from continuing to adhere tightly to the outer wall surface of the second cylinder 532. This creates an intake gap between the first piston 551 and the outer wall surface of the second cylinder 532 at the groove 5321, allowing gas to pass through. The distance between the first seal 558 and the outer wall surface of the second cylinder 532 varies. When the first seal 558 moves to a portion of the outer wall surface (in this embodiment, the groove 5321), the distance between the first seal 558 and the outer wall surface is greater than 0. When the first seal 558 moves to a portion of the outer wall surface (in this embodiment, the normal cylindrical outer wall surface), the distance between the first seal 558 and the outer wall surface is 0. Thus, when the first seal 558 moves to a portion of the outer wall surface, gas can pass through the intake gap because the distance between the first seal 558 and the outer wall surface is greater than zero. When the first seal 558 moves to a portion of the outer wall surface, the intake gap closes because the distance between the first seal 558 and the outer wall surface is zero, and the first seal 558 prevents gas from passing between the first piston 551 and the outer wall surface.

[0082] like Figure 15As shown, when the first seal 558 is located within the groove 5321, the minimum clearance between the first piston 551 and the outer wall surface of the second cylinder 532 is S1, and the distance between the first seal 558 and the outer wall surface of the second cylinder 532 is S2. In some embodiments, setting S2 to be greater than S1 can ensure that the air intake of the cylinder assembly 53 meets the requirements for continuous nail firing by the nail gun.

[0083] In some embodiments, the depth H of the groove 5321 can be from 1 mm to 5 mm. In some embodiments, at least two grooves 5321 are provided on a portion of the outer wall surface of the second cylinder 532. All grooves 5321 can be symmetrically arranged around the second axis 502.

[0084] like Figures 16 to 19 As shown, as an optional sixth embodiment of the cylinder assembly, this application provides a combination of a cylinder assembly 63 and a firing assembly 65. For ease of description, this embodiment mainly describes the differences from the previous embodiment, and components that are the same as or similar to those in the above embodiments are referred to by the same reference numerals. Parts in the above embodiments that are compatible with this embodiment can be applied to this embodiment.

[0085] In this embodiment, the first cylinder 631 includes a first rear cylinder body 6311 and a first front cylinder body 6312, wherein the inner diameter R2 of the first front cylinder body 6312 is larger than the inner diameter R1 of the first rear cylinder body 6311. The first rear cylinder body 6311 is located behind the first front cylinder body 6312. In other embodiments, the first rear cylinder body 6311 may also be located in front of the first front cylinder body 6312.

[0086] The first cylinder cavity 6310 includes a cavity of a first rear cylinder 6311 and a cavity of a first front cylinder 6312. Specifically, the outer diameter of the first front cylinder 6312 is also larger than the outer diameter of the first rear cylinder 6311, or the maximum inner diameter of the first front cylinder 6312 is larger than the minimum inner diameter of the first rear cylinder 6311. In some embodiments, the first cylinder 631 further includes a transition section (not shown in the figure) disposed in the first rear cylinder 6311 and the first front cylinder 6312.

[0087] When the first piston 651 moves the second seal 659 into the cavity of the first rear cylinder 6311, the second seal 659 fits tightly against the inner wall surface of the first rear cylinder 6311. When the first piston 651 moves the second seal 659 into the cavity of the first front cylinder 6312, the second seal 659 can no longer fit tightly against the inner wall surface of the first rear cylinder 6311. As a result, an intake gap is formed between the first piston 651 and the inner wall surface of the first rear cylinder 6311 or the first front cylinder 6312 in the cavity of the first front cylinder 6312, allowing gas to pass through the intake gap.

[0088] like Figure 19As shown, when the second seal 659 is located in the cavity of the first front cylinder 6312, the gap between the first piston 651 and the inner wall surface of the first rear cylinder 6311 is S3, and the gap distance between the second seal 659 and the inner wall surface of the first front cylinder 6312 is S4. In some embodiments, setting S4 to be greater than S3 can ensure that the air intake of the cylinder assembly 63 meets the requirements of the continuous nail gun firing nails.

[0089] In some embodiments, the inner diameters of the first rear cylinder block 6311 and the first front cylinder block 6312 differ by 0.5 mm to 15 mm, preferably by 1 mm, 2 mm, or 5 mm. In some embodiments, the inner diameter R1 of the first rear cylinder block 6311 can range from 30 mm to 150 mm, preferably 50 mm, 60 mm, or 70 mm. In some embodiments, the inner diameter R2 of the first front cylinder block 6312 can range from 32 mm to 165 mm, preferably 35 mm, 65 mm, or 75 mm.

[0090] In some embodiments, the lengths of the first rear cylinder 6311 and the first front cylinder 6312 differ by 10 mm to 50 mm. Preferably, the difference is 10 mm, 15 mm, or 30 mm. In some embodiments, the length L1 of the first rear cylinder 6311 can range from 55 mm to 80 mm. Preferably, the difference is 60 mm, 65 mm, or 70 mm. In some embodiments, the length L2 of the first front cylinder 6312 can range from 25 mm to 75 mm. Preferably, the difference is 30 mm, 4 mm, or 50 mm. Optionally, the length L2 of the first front cylinder 6312 can be equal to or similar to the length of the first piston 651.

[0091] In some embodiments, the mounting base 615 includes an air inlet 6150 through which external gas outside the cylinder assembly 63 can enter the first receiving space 611 to provide sufficient air intake for the cylinder assembly 63.

[0092] In all the above embodiments, all the sealing elements, such as the insert seal 3514, the first seal, and the second seal, can be O-rings, specifically O-rings, which are technologically mature and inexpensive. Alternatively, all the sealing elements, such as the insert seal 3514, the first seal, and the second seal, can also be X-rings, which have excellent sealing performance.

[0093] 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 nail gun, comprising: The shell forms a space for containment; The cylinder assembly is at least partially disposed within the housing; Magazine assembly for storing nails; A firing assembly for striking a nail and at least partially disposed within the cylinder assembly; The cylinder assembly is characterized in that it includes a first cylinder and a second cylinder; The first cylinder includes a first cylinder cavity extending along a first axis, and at least a portion of the second cylinder is disposed within the first cylinder cavity; The nail gun also includes a first piston, at least a portion of which is disposed within the first cylinder cavity, and the first piston is capable of reciprocating within the first cylinder cavity along the first axis. The first piston is configured to form an intake gap with a portion of the outer wall of the second cylinder, allowing gas to pass through the intake gap and enter the first cylinder cavity; The nail gun also includes a first seal, the outer side of which is attached to the first piston, and the inner side of which is attached to a portion of the outer wall of the second cylinder. The first piston can drive the first seal to move on the outer wall surface of the second cylinder; The outer wall surface of part of the second cylinder is provided with grooves; The second cylinder is configured as follows: When the first seal is located in the groove, an air intake gap is formed between the first piston and the outer wall surface of the second cylinder, allowing gas to pass through the air intake gap.

2. The nail gun according to claim 1, characterized in that, The first piston is provided with a first receiving groove for accommodating part of the first seal.

3. The nail gun according to claim 1, characterized in that, The firing assembly further includes a second seal, the inner side of which is in contact with the first piston, and the outer side of which is in contact with the inner wall of the first cylinder. The first piston can drive the second seal to slide on the inner wall surface of the first cylinder; The second cylinder is configured as follows: When the first seal moves to the groove position, the first seal and the outer wall surface of the second cylinder form part of the air intake gap.

4. The nail gun according to claim 3, characterized in that, The first piston is provided with a second receiving groove for accommodating a portion of the second seal.

5. The nail gun according to claim 3, characterized in that, The first seal and / or the second seal are O-rings.

6. The nail gun according to claim 3, characterized in that, The first seal and / or the second seal is an X-shaped sealing ring.

7. The nail gun according to claim 1, characterized in that, The second cylinder includes a second cylinder cavity extending along a second axis, wherein the first axis is parallel to the second axis; The firing assembly includes a second piston disposed within the second cylinder chamber, and the second piston is capable of reciprocating within the second cylinder chamber along the direction of the second axis.

8. The nail gun according to claim 1, characterized in that, The groove depth is 1 mm to 5 mm.

9. The nail gun according to claim 7, characterized in that, At least two grooves are provided on a portion of the outer wall surface of the second cylinder.

10. The nail gun according to claim 9, characterized in that, All of the grooves are arranged symmetrically around the second axis.

11. The nail gun according to claim 1, characterized in that, When the first seal is located in the groove, the distance between the first seal and the outer wall surface of the second cylinder is greater than the minimum gap between the first piston and the outer wall surface of the second cylinder.

12. A nail gun, comprising: The shell forms a space for containment; The cylinder assembly is at least partially disposed within the housing; Magazine assembly for storing nails; A firing assembly for striking a nail and at least partially disposed within the cylinder assembly; The cylinder assembly is characterized in that it includes a first cylinder and a second cylinder; The first cylinder includes a first cylinder cavity extending along a first axis, and at least a portion of the second cylinder is disposed within the first cylinder cavity; The nail gun also includes: A first piston, at least a portion of which is disposed within the first cylinder cavity, is capable of reciprocating within the first cylinder cavity along the first axis. The first seal has its outer side in contact with the first piston and its inner side in contact with a portion of the outer wall of the second cylinder. The first piston can drive the first seal to move on the outer wall surface of the second cylinder; In the first axial direction; the distance between the first seal and a portion of the outer wall surface of the second cylinder is 0, and the distance between the first seal and a portion of the outer wall surface of the second cylinder is greater than 0.

13. The nail gun according to claim 12, characterized in that, In the radial direction, a groove is provided on part of the outer wall surface of the second cylinder, and the distance between the first seal and the groove of the second cylinder is greater than 0.

Images