Nail gun

Abstract

The invention discloses a nail gun which comprises a power assembly at least comprising a motor and a transmission assembly. The firing assembly at least comprises an air cylinder assembly and a firing pin assembly; the shell assembly at least comprises a first shell for a user to hold and a second shell for accommodating at least part of the percussion assembly; the firing pin assembly at least comprises a firing pin and a piston arranged at the top end of the firing pin. The distance D1 between the firing pin and the foremost end of the second shell in the front-back direction is smaller than or equal to 40 mm.

Description

Technical Field

[0001] The present application relates to the technical field of electric tools, and in particular to a nail gun. Background Art

[0002] As a nailing tool, nail guns can be used in many occasions such as home decoration and construction sites. In practical applications, in addition to the requirements for the nailing quality and nailing effect of nail guns, there are also requirements for the operability or comfort of users in operating nail guns.

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

[0004] One purpose of the present application is to solve or at least alleviate part or all of the above problems. To this end, one purpose of the present application is to provide a nail gun with a more comfortable operating feel and better operability.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions: A nail gun comprises: a power assembly, comprising at least a motor and a transmission assembly; a firing assembly, comprising at least a cylinder assembly and a firing pin assembly; a housing assembly, comprising at least a first housing for a user to hold and a second housing for accommodating at least part of the firing assembly; wherein the power assembly is at least partially located in the first housing and / or the second housing; and a distance D7 from the center of gravity of the nail gun to a center plane formed by the first housing along the front-to-back direction and the up-down direction is less than or equal to 5 mm.

[0006] In one embodiment, the center of gravity of the nail gun is located to the left of the center plane.

[0007] In one embodiment, the center of gravity of the nail gun is located to the right of the center plane.

[0008] In one embodiment, the nail gun further includes: a drive assembly, the drive assembly at least including a drive wheel that can rotate in a positive direction to drive the striker assembly; a transmission assembly, arranged between the transmission assembly and the drive assembly to transmit power to the drive assembly; wherein the transmission assembly at least includes a flexible transmission structure.

[0009] In one embodiment, the drive assembly further comprises a one-way clutch structure disposed at the rear end of the drive wheel, and the one-way clutch structure can at least prevent the drive wheel from rotating in a direction opposite to the positive direction.

[0010] In one embodiment, the transmission assembly also includes a first transmission wheel, which is arranged at the output end of the transmission assembly; the second transmission wheel is arranged at the rear end of the driving wheel; one end of the flexible transmission structure is sleeved on the first transmission wheel, and the other end is sleeved on the second transmission wheel.

[0011] A nail gun comprises: a power assembly, comprising at least a motor and a transmission assembly; a firing assembly, comprising at least a cylinder assembly and a firing pin assembly; a housing assembly, comprising at least a first housing for a user to hold and a second housing that at least accommodates part of the firing assembly; the firing pin assembly comprises at least a firing pin and a piston disposed at the top end of the firing pin; wherein a distance D1 from the firing pin to the front end of the second housing in the front-to-back direction is less than or equal to 40 mm.

[0012] In one embodiment, the cylinder assembly includes at least an inner cylinder and an outer cylinder at least partially exposed to the outside; a first center line of the inner cylinder is substantially parallel to a second center line of the outer cylinder in the up-down direction.

[0013] In one embodiment, in the front-to-rear direction, the first center line is located in front of the second center line.

[0014] In one embodiment, an outer surface of the outer cylinder is at least partially exposed outside the second housing.

[0015] In one embodiment, the outer surface of the outer cylinder is at least partially provided with a protective layer.

[0016] In one embodiment, the protective layer comprises at least a polyurea coating.

[0017] A nail gun comprises: a power assembly, comprising at least a motor and a transmission assembly; a firing assembly, comprising at least a cylinder assembly and a firing pin assembly; a housing assembly, comprising at least a first housing for a user to hold and a second housing for accommodating at least part of the firing assembly; the cylinder assembly comprises at least an inner cylinder and an outer cylinder at least partially exposed to the outside; the outer surface area of ​​the outer cylinder exposed outside the second housing accounts for at least 20% of the total outer surface area of ​​the outer cylinder.

[0018] A nail gun comprises: a main unit, comprising: a power assembly, comprising at least a motor and a transmission assembly; a firing assembly, comprising at least a cylinder assembly and a firing pin assembly; a shell assembly, comprising at least a first shell for a user to hold and a second shell for accommodating at least part of the firing assembly; the nail gun further comprises: a clip assembly, comprising at least a clip capable of storing nails; wherein, in the up and down direction, a distance D3 from the lowest end of a holding portion of the first shell for a user to hold to the highest end of the front end of a connection between the clip assembly and the main unit is less than or equal to 60 mm.

[0019] In one embodiment, the nail gun also includes: a driving assembly, which includes at least a driving wheel that can rotate in a positive direction to drive the firing pin assembly; a third center line of the axle of the driving wheel in the front-to-back direction is basically parallel to the motor axis of the motor or the transmission assembly axis of the transmission assembly.

[0020] In one embodiment, a distance D2 between the third center line and the motor axis is less than or equal to 80 mm.

[0021] In one embodiment, the nail gun also includes: a trigger, which is arranged below the first shell and at least partially located in the first shell and / or the second shell; in the up and down direction, the distance D4 from the lower end of the trigger to the upper end of the front end of the connection between the magazine assembly and the main machine is less than or equal to 50 mm.

[0022] In one embodiment, the nail gun further comprises a trigger switch configured to be triggered when the trigger is operated; wherein the trigger switch is at least partially disposed within the second housing.

[0023] In one embodiment, the trigger switch is at least partially disposed within the first housing.

[0024] In one embodiment, the trigger switch is at least partially disposed within the trigger.

[0025] A nail gun comprises: a power assembly, comprising at least a motor and a transmission assembly; a firing assembly, comprising at least a cylinder assembly and a firing pin assembly; a housing assembly, comprising at least a first housing for a user to hold and a second housing for accommodating at least part of the firing assembly; and the diameter of the motor is less than 38 mm.

[0026] In one embodiment, the outer diameter of the transmission assembly is less than or equal to 38 mm.

[0027] In one embodiment, the diameter of the motor is less than or equal to 36 mm.

[0028] A nail gun comprises: a power assembly, comprising at least a motor and a transmission assembly; a firing assembly, comprising at least a cylinder assembly and a firing pin assembly; a shell assembly, comprising at least a first shell for a user to hold and a second shell that at least partially accommodates the firing assembly; wherein the weight of the nail gun is less than or equal to 2 kg.

[0029] In one embodiment, the cylinder assembly includes at least an inner cylinder and an outer cylinder at least partially exposed to the outside; a first center line of the inner cylinder is substantially parallel to a second center line of the outer cylinder in the up-down direction.

[0030] In one embodiment, at least 20% of the outer surface of the outer cylinder is exposed outside the second housing.

[0031] In one embodiment, the power assembly is accommodated in the first housing.

[0032] A nail gun comprises: a power assembly, comprising at least a motor and a transmission assembly; a firing assembly, comprising at least a cylinder assembly and a firing pin assembly; a shell assembly, comprising at least a first shell for a user to hold and a second shell for accommodating at least part of the firing assembly; wherein, during the operation of the nail gun, the surface temperature of the first shell is less than or equal to 55°C.

[0033] In one embodiment, the power assembly is accommodated in the first housing.

[0034] In one embodiment, the nail gun further includes: a heat dissipation component, which is at least partially disposed in the first shell and / or the second shell and is configured to dissipate heat from the power component.

[0035] In one embodiment, the heat dissipation component includes a heat conductor, and the heat conductor is configured to at least conduct away part of the heat of the power component.

[0036] In one embodiment, the heat conducting member is connected at least between the motor and the cylinder assembly.

[0037] In one embodiment, the heat conducting member is connected at least between the transmission assembly and the cylinder assembly.

[0038] In one embodiment, the heat conducting member is connected at least between the motor and the second housing.

[0039] In one embodiment, the heat conducting member is connected at least between the transmission assembly and the second housing.

[0040] In one embodiment, the heat conductor comprises at least one of a phase change heat conductor or a metal heat conductor.

[0041] In one embodiment, the heat dissipation assembly includes a heat dissipation fan; the heat dissipation fan is connected to at least a portion of the power assembly.

[0042] A nail gun comprises: a power assembly, comprising at least a motor and a transmission assembly; a firing assembly, comprising at least a cylinder assembly and a firing pin assembly; a shell assembly, comprising at least a first shell for a user to hold and a second shell for accommodating at least part of the firing assembly; wherein the power assembly is at least partially located in the first shell and / or the second shell; and a distance D9 from the center of gravity of the nail gun to the lowest end of the gripping portion of the first shell in the up-down direction is less than or equal to 20 mm.

[0043] In one embodiment, the center of gravity of the nail gun is located above the lowermost end of the grip portion of the first housing.

[0044] In one embodiment, the center of gravity of the nail gun is located below the lowermost end of the grip portion of the first housing.

[0045] A method for repairing a nail gun, the nail gun comprising: a power assembly, comprising at least a motor and a transmission assembly; a firing assembly, comprising at least a cylinder assembly and a firing pin assembly; a housing assembly, comprising at least a first housing for a user to hold and a second housing for accommodating at least a portion of the firing assembly; the cylinder assembly comprising at least an inner cylinder and an outer cylinder covering an upper end opening of the inner cylinder; the method comprising: exposing the upper end opening of the inner cylinder by removing the outer cylinder, without removing the housing assembly, and disassembling the firing pin assembly in the inner cylinder through the upper end opening of the inner cylinder.

[0046] In one embodiment, the cylinder diameter of the inner cylinder is smaller than the cylinder diameter of the outer cylinder; in a projection plane perpendicular to the up and down directions, the projection of the outer cylinder completely covers the projection of the inner cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0048] Figure 1 is a schematic diagram of the structure of a nail gun in one embodiment; Figure 2 is a schematic structural diagram of a nail gun from another perspective in one embodiment; Figure 3 is a structural schematic diagram of a nail gun in another embodiment, showing the center of gravity of the whole machine from another perspective; Figure 4 is a cross-sectional view of a nail gun structure in one embodiment; Figure 5 is a structural diagram of a nail gun after a portion of the shell is removed in one embodiment; Figure 6 is a structural diagram of an internal transmission system of a nail gun in one embodiment; Figure 7 is a schematic diagram of the position of a trigger switch in one embodiment; Figure 8 is a schematic diagram of the position of a trigger switch in one embodiment; Fig. 9 is a schematic diagram of the arrangement of a nail gun working mode selection module in an embodiment; Fig.10 is a schematic diagram of the arrangement of a nail gun working mode selection module in an embodiment; Fig.11 is a structural schematic diagram of the arrangement position of the power components in one embodiment; Fig.12 is a structural schematic diagram of the arrangement position of the power components in one embodiment; Fig.13 is a structural schematic diagram of a nail gun in another embodiment, showing the center of gravity of the whole machine from another perspective; Fig.14 is a cross-sectional view of a nail gun structure in one embodiment; Fig.15 A cross-sectional view of a nail gun structure in one embodiment Fig.16 The figure is an exploded view of the structure of a nail gun in one embodiment. DETAILED DESCRIPTION

[0049] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0050] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0051] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0052] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0053] In this application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, etc. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0054] In this application, it will be understood by those skilled in the art 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.

[0055] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0056] For the definitions of up, down, left, right, front, and back in this application, please refer to Figures 1 to 6 The orientation shown.

[0057] Figures 1 to 6 The nail gun 100 shown includes: a housing assembly 10, a power assembly 20, a drive assembly 30, a firing assembly 40 and a clip assembly 50. The power assembly 20 may be a power source for driving the nail gun 100 to drive nails, the power generated by the power assembly 20 is transmitted to the drive assembly 30, and the drive assembly 30 drives the firing assembly 40 to perform the nailing action, and the clip assembly 50 is at least used to store nails.

[0058] In this embodiment, the housing assembly 10 at least includes or forms a first housing 11 for the user to hold, i.e., a gripping portion, and a second housing 12 that at least accommodates a portion of the firing assembly 30. The first housing 11 extends substantially in the front-to-back direction, and the second housing 12 extends substantially in the up-down direction, that is, the first housing 11 and the second housing 12 are substantially perpendicular. In this embodiment, no clear distinction is made between the connection between the first housing 11 and the second housing 12. Figures 1 to 6 Taking the orientation shown as an example, the second housing 12 is disposed at the front end of the nail gun 100. When the user holds the first housing 11 of the nail gun 100 and nails, the second housing 12 is substantially perpendicular to the horizontal plane.

[0059] like Figures 1 to 5 The first shell 11 is formed with a battery combination portion 111, and the battery combination portion 111 is formed at the rear end of the first shell 11. The angle α between the installation direction 101 of the battery pack and the extension direction 102 of the first shell 11 is less than or equal to 90°. This embodiment does not limit the type of battery pack suitable for the nail gun 100, for example, it can be a lithium battery, a sodium ion battery, or a lithium iron phosphate battery.

[0060] The power assembly 20 includes at least a motor 21 and a transmission assembly 22. The motor 21 can rotate to generate power to drive the drive assembly 30 to drive the firing assembly 40 to nail. In one embodiment, the motor 21 can be a brushed motor or a brushless motor or an inductive motor or an inductive motor. The transmission assembly 22 can be a transmission gear box or a set of transmission gears, etc. The transmission assembly 22 is arranged at the front end of the motor 21, and has a plurality of gears (not shown) with a certain transmission ratio built in, which can change the speed of the motor 21 transmitted to the drive assembly 30. In this embodiment, at least part of the transmission assembly 20 is arranged in the first housing 11. Exemplarily, the motor 21 and the transmission assembly 22 are both arranged in the first housing 11, or the motor 21 is arranged in the first housing 11, and the transmission assembly 22 is partially arranged in the first housing 11, and partially arranged at the junction of the first housing 11 and the second housing 12.

[0061] In other embodiments, reference Fig.11 The power assembly 20 may also be disposed in the second housing 12, and Fig.12 The middle motor 11 is disposed in the first housing 11 or at least in the gripping portion 110 , and the transmission assembly 22 is disposed in the second housing 12 .

[0062] like Fig.12As shown, the diameter L of the motor 21 is less than 38 mm, or less than or equal to 36 mm, or less than or equal to 35 mm, or less than or equal to 33 mm, or less than or equal to 30 mm. The outer diameter of the transmission assembly 22 is less than or equal to 35 mm, or less than or equal to 33 mm, or less than or equal to 30 mm. In order to make the transmission assembly 22 have a smaller outer diameter, the outer gear ring of the transmission assembly 22 can also be used as the outer shell of the transmission assembly 22, or the transmission assembly 22 is not provided with an axle lock that affects the diameter of the transmission assembly 22. Thus, the outer diameter of the first housing 11 is small, which is convenient for users to hold.

[0063] It is understandable that a lot of heat will be generated during the operation of the power assembly 20. In order to dissipate the heat of the motor 21 or the transmission assembly 22, a cooling fan can be set at the front end of the motor 21, or at the rear end of the transmission assembly 22, or between the motor 21 and the transmission assembly 22. Alternatively, a phase change material can be set, connected, or sprayed at at least part of the power assembly 20, and the phase change of the phase change material can be used to take away part of the heat, at least to achieve the purpose of reducing the surface temperature of the first shell or to reduce the surface temperature of the grip 110. For example, the transmission assembly 22 and / or the motor 21 are sprayed or wrapped with a phase change material. In some embodiments, a phase change heat conductor can also be connected between the power assembly 20 and the cylinder assembly 41, and the phase change characteristics of the phase change heat conductor can be used to transfer the heat of the motor 21 and / or the transmission assembly 22 to the inner cylinder 411 and / or the outer cylinder 412. In some embodiments, a metal heat conductor, such as a copper sheet, may be connected between the motor 21 and the cylinder assembly 41 to transfer the heat generated by the rotation of the motor 21 to the inner cylinder 411 and / or the outer cylinder 412 for dissipation, or a metal heat conductor may be connected between the transmission assembly 22 and the cylinder assembly 41. In other embodiments, metal heat conductors and / or phase change heat conductors may be connected between the motor 21 and the cylinder assembly 41, and between the transmission assembly 22 and the cylinder assembly 41, respectively.

[0064] like Figure 5 As shown, a heat conductor 23 is connected between the transmission assembly 22 and the cylinder assembly 41, which may be a metal heat conductor or a phase change heat conductor. In some embodiments, at least one end of the heat conductor 23 may be connected to the surface of the motor 21 or the surface of the transmission assembly 22, and the other end may be connected to the surface of the inner cylinder 411, or to the surface of the outer cylinder 412, or to the second housing 12, or to the bracket in the second housing 11, or to a metal part in the nail gun 100 away from the power assembly 20, such as a nail rail for leading out nails. Of course, other connection methods may also be used to connect the heat conductor 23, which will not be listed here one by one.

[0065] In this embodiment, the heat dissipation fan or the phase change heat conductive member or the metal heat conductive member can be referred to as a heat dissipation component for dissipating heat from the power component 20. It is understandable that at least one of the above heat dissipation components can be used to dissipate heat from the power component 20, and other types of heat dissipation components can also be used to dissipate heat from the power component 20 without substantially affecting the size of the grip portion 110, which are not listed here.

[0066] In this embodiment, the surface temperature of the first shell 11 is less than or equal to 50° C., or at least the surface temperature of the grip portion 110 is less than or equal to 50° C. In other embodiments, the surface temperature of the first shell 11 or at least the grip portion 110 is less than or equal to 50° C., or less than or equal to 45° C., or less than or equal to 40° C., etc.

[0067] The power generated by the power assembly 20 is transmitted to the driving assembly 30, and the driving assembly 30 can drive the firing assembly 40 to nail. Among them, the driving assembly 30 at least includes a driving wheel 31, and the driving wheel 31 is consistent with the driving wheel in the prior art, which will not be described in detail here.

[0068] The firing assembly 40 at least includes a cylinder assembly 41 and a striker assembly 42. The striker assembly 42 is at least partially located in the cylinder assembly 41. In this embodiment, the cylinder assembly 41 at least includes an inner cylinder 411 and an outer cylinder 412.

[0069] In one embodiment, Figures 4 to 12 As shown, the inner cylinder 411 is at least partially sleeved in the outer cylinder 412, for example, at least the upper end of the inner cylinder 411 is arranged in the outer cylinder 412. The top or upper end of the outer cylinder 412 is provided with a gas filling nozzle 4121, which is used to pre-fill gas into the cylinder assembly 41. The pre-filled gas has a large kinetic energy stored in a compressed state, which can push the striker assembly 42 to drive a nail. In this embodiment, unless there are special circumstances, during the operation of the nail gun 100, the gas filling nozzle 4121 is not opened, the cylinder assembly 41 has no gas exchange with the outside, and the pre-filled gas in the cylinder assembly 41 can passively work to generate kinetic energy to push the striker assembly 42. In one embodiment, an air inlet nozzle and an air outlet nozzle can also be provided on the outer cylinder 412, and no pre-filled gas is required, and gas can be filled during the operation of the nail gun 100. In this embodiment, the striker assembly 42 at least includes a striker 421 and a piston 422 installed at the top of the striker 421, and the piston 422 is installed in the inner cylinder 411.

[0070] In one embodiment, Fig.14 As shown, the inner cylinder 411 is at least partially disposed in the second housing 12 , the outer cylinder 412 is at least partially exposed outside the second housing 12 , and at least the inner cylinder 411 is not disposed in the outer cylinder 412 .

[0071] In one embodiment, reference Fig.14 and Fig.15 , the inner cylinder 411 and the outer cylinder 412 are connected through the middle piece 413. The middle piece 413 is at least partially disposed in the inner cylinder 411, and the outer cylinder 412 is completely exposed outside the second housing 12, and the projections of the inner cylinder 411 and the outer cylinder 412 in the projection plane perpendicular to the left and right directions do not overlap. In this embodiment, the middle piece 413 can be integrally formed with the inner cylinder 411, or can be detachably mounted to the inner cylinder 411.

[0072] In this embodiment, the upper opening of the inner cylinder 411 and the lower opening of the outer cylinder 412 are arranged to fit relatively closely, which can at least ensure that the gas entering from the inflation nozzle 4121 of the outer cylinder 412 can enter the inner cylinder 411, and the projections of the inner cylinder 411 and the outer cylinder 412 on the plane perpendicular to the left and right directions do not overlap, thereby ensuring that the gas rushing into the outer cylinder 412 can quickly enter the inner cylinder 411.

[0073] In this embodiment, since the outer cylinder 412 or its outer surface is completely exposed outside the second housing 12, after removing the fasteners between the outer cylinder 412 and the inner cylinder 411, or removing the fasteners between the outer cylinder 412 and the middle piece 413, the outer cylinder 412 can be directly removed from the nail gun, thereby exposing the opening of the inner cylinder 411 and the firing pin assembly 42 disposed in the inner cylinder 411, as shown in FIG. Fig.16 When the firing pin 421 is damaged or has other problems and needs to be replaced, the outer cylinder 412 can be directly removed from the nail gun without disassembling the housing assembly 10 to expose the firing pin assembly 42 in the inner cylinder 411, and then the firing pin assembly 42 can be directly pulled out of the inner cylinder 411 upward for quick replacement. In this embodiment, the fastener can be a screw.

[0074] In some embodiments, the housing assembly 10 may further include an outer cylinder cover, which may be used to cover part or all of the outer surface of the outer cylinder 412 exposed to the outside, especially a place that is easily damaged, such as the top of the outer cylinder 412. The outer cylinder cover may be fixed to the outer cylinder 412 or to the housing assembly 10 by a plurality of fasteners. The outer cylinder 412 may be exposed by removing the outer cylinder cover, and then the outer cylinder 412 may be removed to expose the opening of the inner cylinder 411 and the striker assembly 42 therein.

[0075] It should be noted that before removing the outer cylinder 412, the air pressure in the cylinder assembly 41 can be reduced by an algorithm, or by opening the inflation nozzle 4121 on the outer cylinder 412 to release the gas in the cylinder assembly 41 to reduce the air pressure in the cylinder assembly 41. This can ensure safety when removing the outer cylinder 412.

[0076] In one embodiment, the outer cylinder 412 may be at least partially disposed within the inner cylinder 411 .

[0077] In this embodiment, the inside and outside are just for distinguishing the naming of the cylinders. The inner cylinder 411 can also be called the driving cylinder, and the outer cylinder 412 can be called the storage cylinder.

[0078] The nailing process of a nailing cycle of the nail gun 100 will be described below in combination with the various components in the firing assembly 40. After the nail gun 100 is shut down, the motor 21 stops outputting power, and finally the firing pin assembly 42 or the firing pin 421 stops at the initial position, and the pre-filled gas in the cylinder assembly 41 is in a compressed state. After the nail gun 100 is powered on and the motor 21 is started, the motor 21 outputs power, and the firing pin assembly 42 is released and instantly obtains a large acceleration and moves from the initial position to the firing position and drives the nail stored in the magazine assembly 50. After driving the nail, the firing pin assembly 42 returns to the initial position from the firing position under the drive of the motor 21 and shuts down. In this process, the firing pin assembly 42 or the piston 422 can continuously compress the gas in the cylinder assembly 41, or continuously compress the gas in the inner cylinder 411. Since the inner cylinder 411 is connected to the outer cylinder 412, the gas in the outer cylinder 412 is also compressed. The above process from the power-on of the motor 21, i.e. the start of the nail gun 100, to the nailing, when the striker assembly 42 returns to the initial position or the vicinity of the initial position, i.e. the stop position, is called a nailing cycle. It should be noted that the initial position is the position where the striker assembly 42 stops after the nail gun 100 stops, and therefore can also be called the stop position. The position to which the striker assembly 42 can move the farthest upward can be called the top stop point, and the position to which it can move the farthest downward can be called the bottom stop point, wherein the firing position and the bottom stop point can be the same position, and the initial position is close to the top stop point from bottom to top but is not the top stop point, that is, the distance between the initial position and the top stop point is greater than zero.

[0079] In this embodiment, the inner cylinder 411 and the outer cylinder 412 are basically cylindrical or columnar structures. Figure 4As shown, in the up-down direction, the first center line 401 of the inner cylinder 411 is substantially parallel to the second center line 402 of the outer cylinder 412, and the first center line 401 is located in front of the second center line 402. That is, the first center line 401 and the second center line 402 do not overlap, the inner cylinder 411 is offset in the outer cylinder 412, and the inner cylinder 411 is arranged close to the front end of the outer cylinder 412. Thus, the first center line 401 is also closer to the front end of the second housing 12. In this embodiment, the piston 422 is substantially a cylindrical structure, built into the inner cylinder 411, and the striker 421 is substantially installed at the center point of the piston 422, so the first center line 401 is also substantially the center line of the striker 421. It can be understood that when the nail gun 100 is nailing, the intersection of the center line of the striker 421 and the workpiece 200 is substantially the nailing position. That is, the installation position of the inner cylinder 411 in the outer cylinder 412 is related to the nailing position of the nail gun 100. When there is a wall or other obstacle in front, the closer the nailing position of the nail gun 100 is to the front, the smaller the nailing distance of the nail gun 100 is, and the better the nailing effect of the nail gun at the corner or corner. The edge distance can be understood as the distance between the nailing position and the front obstruction (for example, the wall).

[0080] Since the front end of the second housing 12 can be understood as the front end of the nail gun 100 when the nail gun 100 is used to drive a nail, even if there is an obstacle blocking the front end of the nail gun 100, the nail gun 100 can only drive a nail only when the front end of the second housing 12 contacts the obstacle. Figure 4 , assuming that there is an obstacle 300 blocking the front of the nail gun 100, the farthest forward position of the nail gun 100 is at position H, that is, the nailing position point H is basically the intersection of the first center line 401 and the workpiece 200, so the distance D1 from the first center line 401 to the front end of the second shell 12 can be understood as the above-mentioned edge distance. In other embodiments, the distance from the position close to or adjacent to the first center line 401 to the front end of the second shell 12 can also be understood as the edge distance. Because the inner cylinder 411 is biased in advance in the outer cylinder 412, the edge distance of the nail gun 100 is shortened to a certain extent, ensuring the nailing effect of the nail gun at a special position.

[0081] In this embodiment, the distance D1 or the edge distance between the first center line 401 and the front end of the second shell 12 is less than or equal to 40 mm. Since the first center line 401 is basically the center line of the striker 421, it can also be understood that the distance between the striker 421 and the front end of the second shell 12 is less than or equal to 40 mm. In other embodiments, the value of the distance D1 can be any number less than or equal to 35 mm, or any number less than or equal to 30 mm, etc.

[0082] In this embodiment, the outer surface of the outer cylinder 412 is at least partially exposed outside the second housing 12, that is, the outer cylinder 412 is not completely inside the second housing 12. Figure 4 and Figure 5 Most of the second cylinder 412 is exposed to the outside, thereby reducing the setting range of the shell assembly 10 to a certain extent, reducing the weight of the nail gun 100, and also reducing the above-mentioned edge distance to a certain extent, which is conducive to the nailing operation at corners or corners to obtain a better nailing effect.

[0083] In this embodiment, the surface area of ​​the outer cylinder 412 exposed outside the second housing 12 accounts for at least 20% of the total surface area of ​​the outer cylinder 412, or at least 30%, or 40%, or 50%, or 60%, or 70% of the total surface area of ​​the outer cylinder 412. In one embodiment, at least the front end of the outer cylinder 412 is exposed outside the second housing 12, that is, the front end of the outer cylinder 412 is not provided with a housing, thereby avoiding the housing outside the outer cylinder 412 from increasing the edge distance of the nail gun 100. A large amount of the outer cylinder 412 is exposed outside the second housing 12, which saves the setting of the cylinder outer housing to a large extent, at least reduces the amount of the second housing 12, and thus reduces the weight of the nail gun 100.

[0084] In this embodiment, in order to protect the outer cylinder 412 exposed to the outside, a protective layer 4122 is provided at least on the outer surface of the outer cylinder 412 exposed to the outside. For example, the protective layer 4122 may be one or more layers of polyurea coating. In other embodiments, a metal protective layer or a plastic protective layer or a protective layer with elasticity or buffering properties may also be used, which are not listed here one by one.

[0085] In the vertical direction, the power assembly 20 and the driving assembly 30 are not on the same horizontal plane. In this embodiment, the third center line 301 of the axle of the driving wheel 31 in the front-to-back direction is substantially parallel to the motor axis 201 of the motor 21 and does not overlap. Figure 6 The distance D2 between the third center line 301 and the motor axis 201 is less than or equal to 80 mm. In other embodiments, D2 is less than or equal to 75 mm, or less than or equal to 70 mm, or less than or equal to 65 mm, etc. It can be understood that the motor axis 201 is substantially coincident with the central axis of the transmission assembly 22, so in some implementations, it can also be said that the third center line 301 is substantially parallel to the central axis of the transmission assembly 22 and the distance between the two is also substantially consistent with D2.

[0086] In the present embodiment, a transmission assembly 60 is further provided between the power assembly 20 and the drive assembly 30. Specifically, a transmission assembly 60 is provided between the transmission assembly 22 and the drive wheel 31 to transmit power to the drive wheel 31. In the present embodiment, the transmission assembly 60 at least includes a flexible transmission member 61, a first transmission wheel 62 connected or coupled to the output shaft or output end of the transmission assembly 22, and a second transmission wheel 63 connected or coupled to the output end of the drive assembly 30. The flexible transmission member 61 may be a synchronous belt, a chain or a poly-V belt, etc. In order to prevent the firing pin 421 from slipping from the initial position after the nail gun 100 is stopped, the drive assembly 30 further includes a one-way clutch structure 32 provided at the rear end of the drive wheel 31. The one-way clutch structure 32 can prevent the drive wheel 31 from being driven by the firing pin 421 to rotate in the opposite direction, thereby preventing the firing pin 421 from accidentally falling from the initial position when nailing is not performed. In the present application, it is defined that the drive assembly 30 or the drive wheel 31 can drive the striker assembly 42 to nail when rotating in the positive direction, and the direction opposite to the positive direction is defined as the reverse direction. For example, when the drive wheel 31 rotates counterclockwise, the nail gun 100 works normally, and the one-way clutch structure 32 also rotates counterclockwise during the normal operation of the nail gun 100, but the one-way clutch structure 32 can prevent the drive wheel 31 from rotating clockwise after the nail gun 100 stops. The working principle of the one-way clutch structure 32 in the present application is basically the same as that in the prior art and will not be described in detail here. In other embodiments, the one-way clutch structure 32 can also be set at other positions, such as at the front end of the drive wheel 31. In one embodiment, the one-way clutch structure 32 can be a one-way bearing.

[0087] In other embodiments, a shaft lock may be provided inside the transmission assembly 22 and the radial dimension of the shaft lock is not greater than the outer diameter of the transmission assembly 22. The shaft lock is also used to prevent the driving wheel 31 from rotating in the reverse direction after the nail gun 100 is stopped.

[0088] refer to Figure 6 In the entire transmission system of the nail gun 100, the motor 21 rotates after being powered on, and drives the transmission assembly 22 to rotate. The rotation speed of the output shaft of the transmission assembly 22 is different from the rotation speed of the motor 21. The rotation of the transmission assembly 22 drives the first transmission wheel 62 to rotate. The first transmission wheel 62 drives the second transmission wheel 63 to rotate through the flexible transmission member 61, and then the second transmission wheel 63 drives the one-way clutch structure 32 and the driving wheel 31 to rotate. The rotation of the driving wheel 31 can drive the firing pin 421 to nail within a nailing cycle and stop at the initial position.

[0089] In this embodiment, the transmission from the power component 20 to the drive component 30 is achieved by adopting a transmission assembly 60 with a flexible transmission member 61, which not only reduces the weight of the entire machine, but also simplifies the number of parts in the machine body, simplifies the installation, and greatly reduces the vibration transmitted from the cylinder assembly 41 to the transmission assembly 22.

[0090] In other embodiments, a gear set may also be used to achieve power transmission from the transmission assembly 22 to the driving wheel 31, and the detailed structure of the gear set is not introduced here.

[0091] In this embodiment, the clip assembly 50 is substantially arranged in parallel with the first housing 11 at the lower end of the nail gun 100, that is, the clip assembly 50 is substantially arranged in the front-to-back direction. As an optional embodiment, the clip assembly 50 is also provided with a window 51 for the user to observe the remaining nails. The window 51 is set as one or more notches on the clip assembly 50, which can allow the user to check the remaining nails on the one hand, and can also be used for simple maintenance of the clip assembly 50 without the user disassembling the clip assembly 50 on the other hand. In this embodiment, the clip assembly 50 also includes a clip switch 52 for the user to disassemble the clip. In other embodiments, the clip assembly 50 may also have an angle of less than 90° with the first housing 11 in the front-to-back direction, that is, the clip assembly 50 is not parallel to the first housing 11 in the front-to-back direction.

[0092] In this embodiment, if Figure 4 As shown in the up-down direction, the distance D3 from the lowermost end of the first shell 11 to the uppermost end of the clip assembly 50 is less than or equal to 60 mm, for example, it can be 60 mm, or 58 mm, or 57 mm, or 55 mm, or 50 mm, etc. The power assembly 20 is arranged in the first shell 11, so that the first shell 11, that is, the gripping portion 110, is closer to the lower end of the whole machine, that is, closer to the clip assembly 50, and the center of gravity of the whole machine is further lowered, so that the operability of the whole machine is better. In addition, by arranging the power assembly 20 in the first shell 11, the shell assembly required for placing the power assembly 20 separately is reduced, thereby further reducing the weight of the whole machine. In one embodiment, the shell assembly 10 also includes a reinforcing shell 13, and the reinforcing shell 13 can further strengthen the connection between the first shell 11 and the second shell 12, thereby enhancing the structural strength of the whole machine. In one embodiment, the reinforcing shell 13 can be at least partially connected or installed on the clip assembly 50. In the up-down direction, the distance D4 from the bottom end of the gripping portion 110 of the first housing 11 for the user to grip to the top end of the reinforcing housing 13 is less than or equal to 50 mm, or less than or equal to 40 mm, or less than or equal to 35 mm, etc. The gripping portion 110 at least does not include the battery combining portion 111. Alternatively, the portion of the first housing 11 extending substantially in the front-to-back direction may be defined as the gripping portion 110.

[0093] In other embodiments, the reinforced housing 13 may not be provided to further reduce the influence of the housing assembly 10 on the weight of the whole device. In some embodiments, an elastic member or a connector with a shock-absorbing effect may be used to connect between the battery combination portion 111 and the clip assembly 50 .

[0094] In this embodiment, the nail gun 100 further includes a trigger 70, which is disposed below the first housing 11 and at least partially located in the first housing 11 or in the second housing 12 or at the junction of the first housing 11 and the second housing 12. The trigger 70 is configured to be operated (e.g., pressed) by a user to trigger a trigger switch 71 in the housing assembly 10. In one embodiment, as Figure 7 The trigger switch 71 is at least partially disposed in the second housing 12 and is located on the left side of the transmission assembly 60, which effectively utilizes the space structure in the second housing 12. When the trigger 70 is operated, the trigger switch 71 can be triggered through the intermediate piece or the trigger 70 body. Figure 8 The trigger switch 71 shown is at least partially disposed in the trigger 70. When the trigger 70 is operated, the trigger switch 71 moves with the trigger 70, so that the trigger switch 71 is triggered by the housing assembly 10 or is touched by the ribs or other settings in the housing assembly 10. By arranging the trigger switch 71 in the trigger 70, the space of the whole machine is saved to a certain extent. In other embodiments, the trigger switch 71 is at least partially disposed at the connection between the first housing 11 and the second housing 12, or at least partially disposed in the first housing 11. In this embodiment, the trigger switch 71 can be a micro switch or an electronic switch.

[0095] In this embodiment, the distance D5 from the bottom end of the trigger 70 to the top end of the magazine assembly 50 is less than or equal to 50 mm, or less than or equal to 45 mm, or less than or equal to 40 mm, etc. The distance D6 from the bottom end of the trigger 70 to the top end of the reinforced housing 13 is less than or equal to 40 mm, or less than or equal to 35 mm, etc.

[0096] In this embodiment, the part other than the clip assembly 50 is defined as the main body 1 of the nail gun 100. In the vertical direction, the distance D8 between the uppermost end of the front end of the clip assembly 50 and the lowermost end of the grip 110 is less than or equal to 60 mm, or less than or equal to 55 mm, or less than or equal to 50 mm.

[0097] refer to Figure 2 and Figure 5 The nail gun 100 is also provided with a mode selection module 80 for the user to operate and select the working mode of the nail gun 100, such as a continuous working mode or a single working mode. The mode selection module 80 can be arranged at the upper end of the battery combination part 111 formed at the rear end of the first housing 11, or arranged on the reinforced housing 13, or at any other position that is convenient for the user to operate and observe.

[0098] In one embodiment, the mode selection module 80 is provided with a mode switch 81, a mode option button 82 and a mode display interface 83. The mode switch 81 and the mode option button 82 require user operation, while the mode display interface 83 can display the current working mode. In order to facilitate the selection of the working mode when operating the nail gun 100 or holding the nail gun 100, the mode switch 81 and the mode option button 82 are generally set on the same side of the mode selection module 80. Commonly used settings, such as Fig. 9 and Fig.10 The long strip arrangement shown, or the square arrangement, or the triangular arrangement in other embodiments. Figure 2 and Figure 3 In the front-to-back direction and the up-down direction, the first housing 11 has a center plane 11A, and the center plane 11A can also basically serve as the center plane of the nail gun 100 in the front-to-back direction and the up-down direction. Figure 2 The illustrated mode selection module 80 is mounted on the reinforced housing 13 , wherein an arrangement direction 801 of the mode switch 81 and the mode option buttons 82 is substantially parallel to the central plane 11A.

[0099] In this embodiment, since the first housing 11 is closer to the magazine assembly 50 or the grip portion is lower, as shown in FIG. Figure 2 The distance D7 from the center of gravity G of the nail gun 100 to the center plane 11A is less than or equal to 5 mm, or less than or equal to 4 mm, or less than or equal to 3 mm, or less than or equal to 2 mm, or less than or equal to 1 mm. In one embodiment, in the up-down direction, the center of gravity G is substantially located below the first housing 11. In the front-to-back direction, the center of gravity G is substantially located at the position where the trigger 70 is located, or is located on the trigger 70. In the left-right direction, the center of gravity G can be on the left or right side of the center plane 11A.

[0100] In one embodiment, Fig.13 The distance D9 from the center of gravity G of the nail gun 100 to the lower end of the grip 110 in the vertical direction is less than or equal to 20 mm, or less than or equal to 15 mm, or less than or equal to 12 mm, or less than or equal to 10 mm, or less than or equal to 8 mm, or less than or equal to 6 mm, or less than or equal to 5 mm, or less than or equal to 2 mm, etc. Therefore, when the handheld nail gun 100 is used to nail a vertically placed workpiece, such as a vertical wall, the center of gravity of the nail gun is closer to the hand, thereby saving more strength. It is understandable that the center of gravity G can be as follows Fig.13 It is shown as being located above the lowermost end of the grip portion 110 , and may also be located below the lowermost end of the grip portion 110 , or exactly located at the lowermost end of the grip portion 110 .

[0101] In this embodiment, when the battery pack is not installed, the weight of the entire nail gun 100 can be controlled within a range of less than or equal to 2 kg by at least reducing the second housing 12 outside the outer cylinder 412 and by setting the power assembly 20 in the first housing 11, thereby reducing the housing required to separately place the power assembly 20. In one embodiment, the weight range of the entire nail gun 100 is less than or equal to 1.8 kg. In one embodiment, the weight range of the entire nail gun 100 is less than or equal to 1.5 kg. In one embodiment, the weight range of the entire nail gun 100 is less than or equal to 1 kg.

[0102] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A nail gun, comprising: A power assembly, including at least a motor and a transmission assembly; A firing assembly, comprising at least a cylinder assembly and a firing pin assembly; A housing assembly, comprising at least a first housing for a user to hold and a second housing for accommodating at least a portion of the firing assembly; The striker assembly at least includes a striker and a piston disposed at the top end of the striker; Wherein, a distance D1 from the striker to the front end of the second shell in the front-to-back direction is less than or equal to 40 mm.

2. The nail gun according to claim 1, characterized in that: The cylinder assembly comprises at least an inner cylinder and an outer cylinder at least partially exposed to the outside; a first center line of the inner cylinder is substantially parallel to a second center line of the outer cylinder in the up-down direction.

3. The nail gun according to claim 2, characterized in that: In the front-to-rear direction, the first center line is located ahead of the second center line.

4. The nail gun according to claim 2, characterized in that: An outer surface of the outer cylinder is at least partially exposed outside the second housing.

5. The nail gun according to claim 2, characterized in that: The outer surface of the outer cylinder is at least partially provided with a protective layer.

6. The nail gun according to claim 5, characterized in that: The protective layer includes at least a polyurea coating.

7. The nail gun according to claim 2, characterized in that: The outer surface area of ​​the outer cylinder exposed outside the second shell accounts for at least 20% of the total outer surface area of ​​the outer cylinder.

8. The nail gun according to claim 1, characterized in that: When the nail gun is in operation, the surface temperature of the first shell is less than or equal to 55°C.

9. The nail gun according to claim 1, characterized in that: The weight of the nail gun is less than or equal to 2 kg.

10. The nail gun according to claim 1, characterized in that: The power assembly is accommodated in the first housing.

11. The nail gun according to claim 1, characterized in that: The nail gun also includes: a driving assembly, which includes at least a driving wheel that can rotate in a positive direction to drive the firing pin assembly; a third center line of the wheel axle of the driving wheel in the front-to-back direction is basically parallel to the motor axis of the motor or the transmission assembly axis of the transmission assembly.

12. The nail gun according to claim 11, characterized in that A distance D2 between the third center line and the motor axis is less than or equal to 80 mm.

13. The nail gun according to claim 1, characterized in that: The nail gun also includes: a trigger, which is arranged below the first shell and at least partially located in the first shell and / or the second shell; in the up and down direction, the distance D4 from the lower end of the trigger to the upper end of the front end of the connection between the magazine assembly and the main machine is less than or equal to 50 mm.

14. The nail gun according to claim 1, characterized in that The nail gun also includes a trigger switch, which is configured to be triggered when the trigger is operated; wherein the trigger switch is at least partially disposed within the second housing.

15. The nail gun according to claim 14, characterized in that: The trigger switch is at least partially disposed within the first housing.

16. The nail gun according to claim 14, characterized in that The trigger switch is at least partially disposed within the trigger.

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