Nail gun

Abstract

The utility model discloses a nail gun which comprises a power assembly which at least comprises a motor and a transmission assembly. The firing assembly at least comprises an air cylinder assembly and a firing pin assembly; the cylinder assembly at least comprises an inner cylinder and an outer cylinder which are communicated with each other; the firing pin assembly is at least partially located in the inner air cylinder. 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 power assembly is located in the first shell. The diameter of the motor is smaller than 38 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 are used in many situations, such as home improvement and construction sites. In practical applications, in addition to the quality and effect of nailing, nail guns also have requirements for operability and comfort of users.

[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 a 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:

[0006] 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 partially accommodates the firing assembly; wherein the power assembly is at least partially located within the first housing and / or the second housing; and a distance D7 between the center of gravity of the nail gun and 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.

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

[0008] In one embodiment, the center of gravity of the nail gun is located to the right of the center plane.

[0009] In one embodiment, the nail gun further includes: a drive assembly, the drive assembly including at least 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 includes at least a flexible transmission structure.

[0010] In one embodiment, the drive assembly further comprises a one-way clutch structure provided at the rear end of the drive wheel, wherein the one-way clutch structure can at least prevent the drive wheel from rotating in a direction opposite to the positive direction.

[0011] In one embodiment, the transmission assembly further includes a first transmission wheel, which is arranged at the output end of the transmission assembly; a 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.

[0012] 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 a portion of the firing assembly; the firing pin assembly comprises at least a firing pin and a piston arranged at the top end of the firing pin; wherein, in the front-to-back direction, a distance D1 from the firing pin to the front end of the second housing is less than or equal to 40 mm.

[0013] 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 a vertical direction.

[0014] In one embodiment, in the front-to-back direction, the first centerline is located ahead of the second centerline.

[0015] In one embodiment, an outer surface of the outer cylinder is at least partially exposed outside the second housing.

[0016] In one embodiment, the outer surface of the outer cylinder is at least partially provided with a protective layer.

[0017] In one embodiment, the protective layer comprises at least a polyurea coating.

[0018] 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 a portion 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 surface area of the outer cylinder exposed outside the second housing accounts for at least 20% of the total surface area of the outer cylinder.

[0019] 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 magazine assembly, comprising at least a magazine capable of storing nails; wherein, in the up and down direction, a distance D3 from the lowest end of a grip portion of the first shell for a user to hold to the highest end of the front end of a connection between the magazine assembly and the main unit is less than or equal to 60 mm.

[0020] In one embodiment, the nail gun also includes: a drive assembly, which includes at least a drive wheel that can rotate in a positive direction to drive the striker assembly; the third center line of the axle of the drive 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.

[0021] In one embodiment, a distance D2 between the third center line and the motor axis is less than or equal to 80 mm.

[0022] In one embodiment, the nail gun also includes: a trigger, which is arranged below the first shell and at least partially located inside 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 body is less than or equal to 50 mm.

[0023] 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.

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

[0025] In one embodiment, the trigger switch is at least partially disposed within the trigger.

[0026] A nail gun comprises: a power assembly including at least a motor and a transmission assembly; a firing assembly including at least a cylinder assembly and a striker assembly; a housing assembly including at least a first housing for a user to hold and a second housing for accommodating at least part of the firing assembly; the diameter of the motor is less than 38 mm.

[0027] In one embodiment, the outer diameter of the transmission assembly is less than or equal to 38 mm.

[0028] In one embodiment, the diameter of the motor is less than or equal to 36 mm.

[0029] 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 a portion of the firing assembly; wherein the weight of the nail gun is less than or equal to 2 kg.

[0030] 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 a vertical direction.

[0031] In one embodiment, at least 20% of the outer surface of the outer cylinder is exposed outside the second housing.

[0032] In one embodiment, the power assembly is housed in the first housing.

[0033] 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, during operation of the nail gun, the surface temperature of the first housing is less than or equal to 55°C.

[0034] In one embodiment, the power assembly is housed in the first housing.

[0035] 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.

[0036] In one embodiment, the heat dissipation assembly includes a heat conductor, which is configured to conduct at least part of the heat of the power assembly.

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

[0038] In one embodiment, the heat conducting member is connected at least between the transmission assembly and the cylinder assembly.

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

[0040] In one embodiment, the heat conducting member is connected at least between the transmission assembly and the second housing.

[0041] In one embodiment, the heat conducting member includes at least one of a phase change heat conducting member or a metal heat conducting member.

[0042] 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.

[0043] 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 within the first housing and / or the second housing; and a distance D9 from the center of gravity of the nail gun to the lowest end of the gripping portion of the first housing in the up-down direction is less than or equal to 20 mm.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. 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 any creative work.

[0049] Figure 1 is a schematic structural diagram of a nail gun in one embodiment;

[0050] Figure 2 is a schematic structural diagram of a nail gun from another perspective in one embodiment;

[0051] Figure 3 is a structural diagram of a nail gun in another embodiment, showing the center of gravity of the entire machine from another perspective;

[0052] Figure 4 is a cross-sectional view of a nail gun structure in one embodiment;

[0053] Figure 5 is a structural diagram of a nail gun with part of the housing removed in one embodiment;

[0054] Figure 6 is a structural diagram of the internal transmission system of a nail gun in one embodiment;

[0055] Figure 7 is a schematic diagram of the position of a trigger switch in one embodiment;

[0056] Figure 8 is a schematic diagram of the position of a trigger switch in one embodiment;

[0057] Figure 9 This is a schematic diagram of the arrangement of a nail gun working mode selection module in an embodiment;

[0058] Figure 10 This is a schematic diagram of the arrangement of a nail gun working mode selection module in an embodiment;

[0059] Figure 11 is a structural diagram of the arrangement of the power components in one embodiment;

[0060] Figure 12 is a structural diagram of the arrangement of the power components in one embodiment;

[0061] Figure 13 is a structural diagram of a nail gun in another embodiment, showing the center of gravity of the entire machine from another perspective;

[0062] Figure 14 is a cross-sectional view of a nail gun structure in one embodiment;

[0063] Figure 15 A cross-sectional view of a nail gun structure in one embodiment

[0064] Figure 16 FIG. 1 is an exploded view of a nail gun structure in an embodiment. DETAILED DESCRIPTION

[0065] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0066] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0067] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0068] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0069] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of the specific value, the tolerance caused by manufacturing, assembly, and use associated with the 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" when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular) may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) based on the indicated angle.

[0070] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0071] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0072] The definitions of up, down, left, right, front and back in this application can be referred to Figures 1 to 6 The direction shown.

[0073] Figures 1 to 6The illustrated nail gun 100 includes a housing assembly 10, a power assembly 20, a drive assembly 30, a firing assembly 40, and a magazine assembly 50. The power assembly 20 may be the 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, which drives the firing assembly 40 to perform the nailing action. The magazine assembly 50 is used to store nails.

[0074] 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. In other words, 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.

[0075] like Figures 1 to 5 The first housing 11 is formed with a battery coupling portion 111, which is formed at the rear end of the first housing 11. The angle α between the battery pack installation direction 101 and the extension direction 102 of the first housing 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.

[0076] The power assembly 20 includes at least a motor 21 and a transmission assembly 22. The motor 21 rotates to generate power, driving the drive assembly 30 to drive the firing assembly 40 to engage nails. In one embodiment, the motor 21 can be a brushed motor, a brushless motor, an inductive motor, or an inductive motor. The transmission assembly 22 can be a transmission gearbox or a set of transmission gears. The transmission assembly 22 is located at the front end of the motor 21 and contains multiple gears (not shown) with specific transmission ratios, which can change the speed of the transmission from the motor 21 to the drive assembly 30. In this embodiment, at least a portion of the transmission assembly 20 is located within the first housing 11. Exemplarily, both the motor 21 and the transmission assembly 22 are located within the first housing 11, or the motor 21 is located within the first housing 11, and the transmission assembly 22 is located partially within the first housing 11 and partially at the interface between the first housing 11 and the second housing 12.

[0077] In other embodiments, reference Figure 11 The power assembly 20 may also be disposed in the second housing 12, and Figure 12 The middle motor 11 is disposed in the first housing 11 or at least in the grip portion 110 , and the transmission assembly 22 is disposed in the second housing 12 .

[0078] like Figure 12 As 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 serve as the outer shell of the transmission assembly 22, or the transmission assembly 22 is not provided with an axis lock that affects the diameter of the transmission assembly 22. As a result, the outer diameter of the first housing 11 is smaller, making it easier for the user to hold.

[0079] It is understandable that a lot of heat is generated during the operation of the power assembly 20. In order to dissipate the heat for the motor 21 or the transmission assembly 22, a cooling fan can be provided 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 provided, connected, or sprayed at at least part of the position 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 lowering the surface temperature of the first shell or to lower 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 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.

[0080] like Figure 5 A heat conductor 23 is shown connected between the transmission assembly 22 and the cylinder assembly 41. For example, it 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 a bracket within the second housing 11, or to a metal component in the nail gun 100 that is away from the power assembly 20, such as a nail rail for guiding nails. Of course, other connection methods for connecting the heat conductor 23 are also possible and are not listed here.

[0081] In this embodiment, the cooling fan, the phase change heat conductor, or the metal heat conductor can all be referred to as heat dissipation components for dissipating heat from the power assembly 20. It is understood that at least one of the aforementioned heat dissipation components can be used to dissipate heat from the power assembly 20, and other types of heat dissipation components can also be used to dissipate heat from the power assembly 20 without substantially affecting the size of the grip portion 110. These are not listed here.

[0082] In this embodiment, the surface temperature of the first housing 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 housing 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.

[0083] The power generated by the power assembly 20 is transmitted to the drive assembly 30, and the drive assembly 30 can drive the firing assembly 40 to nail. Among them, the drive assembly 30 at least includes a drive wheel 31, which is consistent with the drive wheel in the prior art and is not described in detail here.

[0084] The firing assembly 40 includes at least a cylinder assembly 41 and a striker assembly 42. The striker assembly 42 is at least partially located within the cylinder assembly 41. In this embodiment, the cylinder assembly 41 includes at least an inner cylinder 411 and an outer cylinder 412.

[0085] In one embodiment, Figures 4 to 12 As shown, the inner cylinder 411 is at least partially nested within the outer cylinder 412. For example, at least the upper end of the inner cylinder 411 is disposed within the outer cylinder 412. A gas nozzle 4121 is provided at the top or upper end of the outer cylinder 412 for pre-filling the cylinder assembly 41 with gas. The pre-filled gas, in its compressed state, stores significant kinetic energy, which can propel the striker assembly 42 to drive a nail. In this embodiment, unless otherwise specified, during operation of the nail gun 100, the gas nozzle 4121 is closed, preventing gas exchange between the cylinder assembly 41 and the outside world. The pre-filled gas within the cylinder assembly 41 can passively generate kinetic energy to propel the striker assembly 42. In one embodiment, the outer cylinder 412 may also be provided with an air inlet and outlet nozzle, eliminating the need for pre-filling and allowing gas to be filled during operation of the nail gun 100. In this embodiment, the striker assembly 42 comprises at least a striker 421 and a piston 422 mounted at the top of the striker 421. The piston 422 is mounted within the inner cylinder 411.

[0086] In one embodiment, Figure 14 As shown, the inner cylinder 411 is at least partially disposed within 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 within the outer cylinder 412 .

[0087] In one embodiment, reference Figure 14 and Figure 15 The inner cylinder 411 and the outer cylinder 412 are connected via an intermediate member 413. The intermediate member 413 is at least partially disposed within the inner cylinder 411, while the outer cylinder 412 is entirely exposed outside the second housing 12. The projections of the inner cylinder 411 and the outer cylinder 412 on a projection plane perpendicular to the left-right direction do not overlap. In this embodiment, the intermediate member 413 can be integrally formed with the inner cylinder 411, or can be removably attached to the inner cylinder 411.

[0088] In this embodiment, the upper opening of the inner cylinder 411 and the lower opening of the outer cylinder 412 are arranged to fit relative to each other, 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.

[0089] 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 intermediate member 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. Figure 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, exposing the firing pin assembly 42 in the inner cylinder 411. The firing pin assembly 42 can then be directly pulled upward out of the inner cylinder 411 for quick replacement. In this embodiment, the fastener can be a screw.

[0090] In some embodiments, the housing assembly 10 may further include an outer cylinder cover that can be used to cover part or all of the exposed outer surface of the outer cylinder 412, particularly areas that are susceptible to damage, such as the top of the outer cylinder 412. The outer cylinder cover can be secured to the outer cylinder 412 or to the housing assembly 10 via a plurality of fasteners. The outer cylinder 412 can be exposed by removing the outer cylinder cover, and the outer cylinder 412 can then be removed to expose the opening of the inner cylinder 411 and the striker assembly 42 therein.

[0091] 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 air in the cylinder assembly 41 to reduce the air pressure in the cylinder assembly 41. This ensures safety when removing the outer cylinder 412.

[0092] In one embodiment, the outer cylinder 412 may be at least partially disposed within the inner cylinder 411 .

[0093] In this embodiment, the inner and outer are only used to distinguish the cylinders. The inner cylinder 411 can also be called the driving cylinder and the outer cylinder 412 can be called the storage cylinder.

[0094] The following describes the nailing process of the nail gun 100 during a nailing cycle, focusing on the various components within the firing assembly 40. After the nail gun 100 is shut down, the motor 21 stops outputting power, ultimately causing the firing pin assembly 42, or firing pin 421, to stop at its initial position, leaving the pre-charged gas within the cylinder assembly 41 in a compressed state. When the nail gun 100 is powered on and the motor 21 is activated, the motor 21 outputs power, releasing the firing pin assembly 42, which experiences a significant acceleration upon release, moving from its initial position to its firing position and ejecting the nail stored in the magazine assembly 50. After ejecting the nail, the firing pin assembly 42, driven by the motor 21, returns to its initial position and shuts down. During this process, the firing pin assembly 42, or piston 422, continues to compress the gas within the cylinder assembly 41, or in other words, the gas within the inner cylinder 411. Since the inner cylinder 411 is connected to the outer cylinder 412, the gas within the outer cylinder 412 is also compressed. The process from when the motor 21 is powered on, i.e., the nail gun 100 is started, to when the nailing is completed, and the striker assembly 42 returns to the initial position or near the initial position, i.e., the stop position, is referred to as 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 is stopped, and therefore may also be referred to as the stop position. The position to which the striker assembly 42 can move upwards is referred to as the top dead center, and the position to which the striker assembly 42 can move downwards is referred to as the bottom dead center. The firing position and the bottom dead center may be the same position, and the initial position is closer to the top dead center from bottom to top, but is not the top dead center, that is, the distance between the initial position and the top dead center is greater than zero.

[0095] In this embodiment, the inner cylinder 411 and the outer cylinder 412 are basically cylindrical or columnar structures. Figure 4As shown, in the vertical direction, the first centerline 401 of the inner cylinder 411 and the second centerline 402 of the outer cylinder 412 are substantially parallel, and the first centerline 401 is located forward of the second centerline 402. In other words, the first centerline 401 and the second centerline 402 do not overlap. The inner cylinder 411 is offset within the outer cylinder 412 and positioned closer to the front end of the outer cylinder 412. Consequently, the first centerline 401 is closer to the front end of the second housing 12. In this embodiment, the piston 422 is a substantially cylindrical structure, built into the inner cylinder 411. The striker 421 is mounted substantially at the center of the piston 422. Therefore, the first centerline 401 is also substantially the centerline of the striker 421. It will be appreciated that when the nail gun 100 is driving a nail, the intersection of the striker 421's centerline and the workpiece 200 is substantially the nail ejection point. In other words, the mounting position of the inner cylinder 411 within the outer cylinder 412 is correlated with the nail ejection point of the nail gun 100. When there is a wall or other obstacle in front of you, the closer the nail gun 100 is to the front, the smaller the nail gun 100's nailing distance will be, and the better the nail gun's nailing effect in corners or corners. The nail gun's nailing distance can be understood as the distance between the nail gun position and the obstacle in front (e.g., a wall).

[0096] Since the front end of the second housing 12 can be understood as the front end of the nail gun 100 when using the nail gun 100 to nail, even if there is an obstacle blocking the front end of the nail gun 100, the nail gun 100 can only nail when the front end of the second housing 12 contacts the obstacle. Figure 4 Assuming there's an obstacle 300 blocking the front of the nail gun 100, the farthest forward the nail gun 100 can reach is at position H. That is, the nailing point H is essentially the intersection of the first centerline 401 and the workpiece 200. Therefore, the distance D1 from the first centerline 401 to the front end of the second housing 12 can be considered the aforementioned edge distance. In other embodiments, the distance from a position close to or adjacent to the first centerline 401 to the front end of the second housing 12 can also be considered the edge distance. Because the inner cylinder 411 is offset forward within the outer cylinder 412, the edge distance of the nail gun 100 is shortened to a certain extent, ensuring effective nailing at specific locations.

[0097] In this embodiment, the distance D1, or the edge distance, between the first centerline 401 and the front end of the second housing 12 is less than or equal to 40 mm. Since the first centerline 401 is essentially the centerline of the striker 421, it can also be understood that the distance between the striker 421 and the front end of the second housing 12 is less than or equal to 40 mm. In other embodiments, the distance D1 can be any number less than or equal to 35 mm, or any number less than or equal to 30 mm.

[0098] 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 entirely 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 achieving better nailing effects in nailing operations at corners or corners.

[0099] 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%, 40%, 50%, 60%, 70%, etc. In one embodiment, at least the front end of the outer cylinder 412 is exposed outside the second housing 12, i.e., no housing is provided at the front end of the outer cylinder 412. This prevents the housing outside the outer cylinder 412 from increasing the edge contact distance of the nail gun 100. Exposing a large amount of the outer cylinder 412 outside the second housing 12 significantly eliminates the need for an outer cylinder housing, at least reducing the amount of the second housing 12, thereby reducing the overall weight of the nail gun 100.

[0100] In this embodiment, to protect the exposed outer cylinder 412, a protective layer 4122 is provided on at least the exposed outer surface of the outer cylinder 412. For example, the protective layer 4122 may be one or more layers of polyurea coating. In other embodiments, a metal protective layer, a plastic protective layer, or a protective layer having elastic or cushioning properties may also be used, and these are not listed here.

[0101] In the vertical direction, the power assembly 20 and the drive assembly 30 are not on the same horizontal plane. In this embodiment, the third center line 301 of the axle of the drive wheel 31 in the front-to-back direction is substantially parallel to the motor axis 201 of the motor 21 and does not coincide with each other. In one embodiment, Figure 6 The distance D2 between the third centerline 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 will be understood that the motor axis 201 substantially coincides with the central axis of the transmission assembly 22. Therefore, in some implementations, the third centerline 301 can be said to be substantially parallel to the central axis of the transmission assembly 22, and the distance between the third centerline 301 and the central axis of the transmission assembly 22 is also substantially consistent with D2.

[0102] In this embodiment, a transmission assembly 60 is further provided between the power assembly 20 and the drive assembly 30. Specifically, the transmission assembly 60 is provided between the transmission assembly 22 and the drive wheel 31 to transmit power to the drive wheel 31. In this embodiment, the transmission assembly 60 includes at least 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 timing belt, a chain, or a poly-V belt. To prevent the firing pin 421 from sliding from its initial position after the nail gun 100 is shut down, the drive assembly 30 further includes a one-way clutch structure 32 disposed at the rear end of the drive wheel 31. The one-way clutch structure 32 prevents the drive wheel 31 from being driven in the opposite direction by the firing pin 421, thereby preventing the firing pin 421 from accidentally falling from its initial position when not nailing. 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 operates normally, and the one-way clutch structure 32 also rotates counterclockwise during 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 is shut down. 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.

[0103] In other embodiments, a shaft lock may be provided inside the transmission assembly 22, and the radial dimension of the shaft lock may be no greater than the outer diameter of the transmission assembly 22. The shaft lock is also used to prevent the drive wheel 31 from rotating in the reverse direction after the nail gun 100 is stopped.

[0104] 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, and the first transmission wheel 62 drives the second transmission wheel 63 to rotate through the flexible transmission member 61. Then, the second transmission wheel 63 drives the one-way clutch structure 32 and the drive wheel 31 to rotate. The rotation of the drive wheel 31 can drive the firing pin 421 to nail within one nailing cycle and stop at the initial position.

[0105] In this embodiment, the transmission from the power component 20 to the drive component 30 is achieved by adopting a transmission component 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 component 41 to the transmission component 22.

[0106] In other embodiments, a gear set may also be used to achieve power transmission from the transmission assembly 22 to the drive wheel 31 , and the detailed structure of the gear set will not be introduced here.

[0107] In this embodiment, the clip assembly 50 is positioned substantially parallel to the first housing 11 at the lower end of the nail gun 100. That is, the clip assembly 50 is positioned substantially in the front-to-back direction. As an optional embodiment, the clip assembly 50 is further provided with a window 51 through which the user can view the remaining nails. The window 51, configured as one or more notches in the clip assembly 50, allows the user to view the remaining nails and also facilitates simple maintenance of the clip assembly 50 without disassembling it. In this embodiment, the clip assembly 50 also includes a clip switch 52 for user removal of the clip. In other embodiments, the clip assembly 50 may also be positioned at an angle less than 90° relative to the first housing 11 in the front-to-back direction, meaning that the clip assembly 50 is not parallel to the first housing 11 in the front-to-back direction.

[0108] In this embodiment, if Figure 4 As shown, in the vertical direction, the distance D3 from the lowermost end of the first housing 11 to the uppermost end of the clip assembly 50 is less than or equal to 60 mm, and can be, for example, 60 mm, or 58 mm, or 57 mm, or 55 mm, or 50 mm, etc. The power assembly 20 is disposed within the first housing 11, so that the first housing 11, i.e., the grip portion 110, is closer to the lower end of the entire device, i.e., closer to the clip assembly 50, further lowering the center of gravity of the entire device and improving the operability of the entire device. In addition, by disposing the power assembly 20 within the first housing 11, the number of housing components required to separately house the power assembly 20 is reduced, thereby further reducing the weight of the entire device. In one embodiment, the housing assembly 10 further includes a reinforcing housing 13, which can further strengthen the connection between the first housing 11 and the second housing 12, thereby enhancing the structural strength of the entire device. In one embodiment, the reinforcing housing 13 can be at least partially connected to or mounted on the clip assembly 50. In the vertical direction, the distance D4 between the bottom end of the grip portion 110 of the first housing 11, which is held by the user, and the top end of the reinforcement 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 grip portion 110 does not include at least the battery coupling portion 111. Alternatively, the grip portion 110 can be defined as the portion of the first housing 11 that extends substantially in the front-to-back direction.

[0109] In other embodiments, the reinforced housing 13 may not be provided to further reduce the impact of the housing assembly 10 on the overall weight. In some embodiments, an elastic member or a connector with a shock-absorbing effect may be used to connect the battery coupling portion 111 and the clip assembly 50 .

[0110] 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 within the first housing 11 or within 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 within 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, effectively utilizing 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. In one embodiment, as Figure 8 The trigger switch 71 shown is at least partially disposed within the trigger 70. When the trigger 70 is operated, the trigger switch 71 moves with the trigger 70, thereby being triggered by the housing assembly 10 or contacted by ribs or other features within the housing assembly 10. Placing the trigger switch 71 within the trigger 70 reduces overall device space to a certain extent. In other embodiments, the trigger switch 71 is at least partially disposed at the junction of the first housing 11 and the second housing 12, or at least partially disposed within the first housing 11. In this embodiment, the trigger switch 71 may be a microswitch or an electronic switch.

[0111] In this embodiment, a 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. A 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.

[0112] In this embodiment, the portion excluding the clip assembly 50 is defined as the main body 1 of the nail gun 100. In the vertical direction, a 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.

[0113] refer to Figure 2 and Figure 5 The nail gun 100 is also provided with a mode selection module 80 for the user to select the operating mode of the nail gun 100, such as continuous firing mode or single firing mode. The mode selection module 80 can be located above the battery connection portion 111 formed at the rear end of the first housing 11, or on the reinforced housing 13, or at any other location that is convenient for the user to operate and observe.

[0114] 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. Among them, the mode switch 81 and the mode option button 82 require user operation, and 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. Common settings, such as Figure 9 and Figure 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, which can also serve as the center plane of the nail gun 100 in the front-to-back direction and the up-down direction. Figure 2 The mode selection module 80 is shown 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.

[0115] 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 between the center of gravity G of the nail gun 100 and 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 vertical direction, the center of gravity G is substantially below the first housing 11. In the front-to-back direction, the center of gravity G is substantially located at or above the trigger 70. In the left-right direction, the center of gravity G can be to the left or right of the center plane 11A.

[0116] In one embodiment, Figure 13 The distance D9 from the center of gravity G of the nail gun 100 to the bottom 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 energy. It is understandable that the center of gravity G can be as follows Figure 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 at the lowermost end of the grip portion 110 .

[0117] In this embodiment, when the battery pack is not installed, by at least reducing the second housing 12 outside the outer cylinder 412 and positioning the power assembly 20 within the first housing 11, the housing required to house the power assembly 20 is reduced, thereby reducing the total weight of the nail gun 100 to be less than or equal to 2 kg. In one embodiment, the total weight of the nail gun 100 is less than or equal to 1.8 kg. In one embodiment, the total weight of the nail gun 100 is less than or equal to 1.5 kg. In one embodiment, the total weight of the nail gun 100 is less than or equal to 1 kg.

[0118] The above shows and describes the basic principles, main features and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of this application.

Claims

1. A nail gun comprising: 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; The cylinder assembly comprises at least an inner cylinder and an outer cylinder, wherein the inner cylinder is in communication with the outer cylinder; The striker assembly is at least partially located within the inner cylinder; A housing assembly comprising at least a first housing for a user to grip and a second housing for accommodating at least a portion of the firing assembly; The power assembly is located in the first housing; It is characterized in that The diameter of the motor is less than 38 mm.

2. The nail gun according to claim 1, characterized in that The outer diameter of the transmission assembly is less than or equal to 38 mm.

3. The nail gun according to claim 1, characterized in that The diameter of the motor is less than or equal to 36 mm.

4. The nail gun according to claim 1, characterized in that The nail gun further includes 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.

5. The nail gun according to claim 4, characterized in that The trigger switch is at least partially disposed within the first housing.

6. The nail gun according to claim 4, characterized in that The trigger switch is at least partially disposed within the trigger.

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

8. The nail gun according to claim 1, wherein: 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 a vertical direction.

9. The nail gun according to claim 8, characterized in that At least 20% of the outer surface of the outer cylinder is exposed outside the second shell.

10. The nail gun according to claim 1, wherein: During operation of the nail gun, the surface temperature of the first housing is less than or equal to 55°C.

11. The nail gun according to claim 1, wherein: The power assembly is accommodated in the first housing.

12. The nail gun according to claim 10, characterized in that The nail gun further includes a heat dissipation component, which is at least partially disposed in the first housing and / or the second housing and is configured to dissipate heat from the power component.

13. The nail gun according to claim 12, wherein: The heat dissipation assembly includes a heat conducting member, and the heat conducting member is configured to conduct at least part of the heat of the power assembly.

14. The nail gun according to claim 13, wherein: The heat conducting member is at least connected between the motor and the cylinder assembly.

15. The nail gun according to claim 13, wherein: The heat conducting member is at least connected between the transmission assembly and the cylinder assembly.

16. The nail gun according to claim 13, wherein: The heat conducting member is at least connected between the motor and the second housing.

17. The nail gun according to claim 13, wherein: The heat conducting member is at least connected between the transmission assembly and the second shell.

18. The nail gun according to claim 13, wherein: The heat conducting member includes at least one of a phase change heat conducting member and a metal heat conducting member.

19. The nail gun according to claim 12, wherein: The heat dissipation component includes a heat dissipation fan; the heat dissipation fan is connected to at least a portion of the power component.

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