Nail gun

Abstract

The utility model discloses a nail gun which comprises a main machine, a power assembly, a driving assembly and a driving 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 nail gun further comprises a cartridge clip assembly which at least comprises a cartridge clip capable of storing nails. In the vertical direction, the distance D3 between the lowest end of a holding part of the first shell for a user to hold and the uppermost end of the foremost end of the joint of the cartridge holder assembly and the host is smaller than or equal to 60 mm.

Description

Technical Field

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

[0002] As a nail driving tool, a nail gun can be used in many occasions such as home decoration and construction sites. In actual applications, there are requirements not only for the quality and effect of nail driving, but also for the operability or comfort of the user to operate the nail gun.

[0003] This section provides background information related to the present application, and these background information are not necessarily prior art. Summary of the Invention

[0004] An object of the present application is to solve or at least alleviate part or all of the above problems. For this purpose, an object of the present application is to provide a nail gun with a more comfortable operation feel and better operability.

[0005] To achieve the above object, the present application adopts the following technical solutions:

[0006] A nail gun, comprising: a power assembly, at least including a motor and a transmission assembly; a firing assembly, at least including a cylinder assembly and a firing pin assembly; a housing assembly, at least including a first housing for the user to hold and a second housing for accommodating at least part of the firing assembly; wherein, at least part of the power assembly is located in the first housing and / or the second housing; the distance D7 between the center of gravity of the nail gun and the central plane formed by the first housing in the front-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 on the left side of the central plane.

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

[0009] In one embodiment, the nail gun further comprises: a driving assembly, the driving assembly at least including a driving wheel that can rotate in the positive direction to drive the firing pin assembly; a transmission assembly, arranged between the transmission assembly and the driving assembly to transmit power to the driving assembly; wherein, the transmission assembly at least includes a flexible transmission structure.

[0010] In one embodiment, the driving assembly further includes a one-way clutch structure arranged at the rear end of the driving wheel, and the one-way clutch structure can at least prevent the driving wheel from rotating in the direction opposite to the positive direction.

[0011] In one embodiment, the transmission assembly further includes a first transmission wheel disposed at the output end of the transmission assembly; a second transmission wheel disposed at the rear end of the drive 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 includes: a power assembly including at least a motor and a transmission assembly; a firing assembly including at least a cylinder assembly and a firing pin assembly; a housing assembly including at least a first housing for a user to hold and a second housing for accommodating at least a part of the firing assembly; the firing pin assembly includes at least a firing pin and a piston disposed at the top end of the firing pin; wherein, in the front-rear direction, the distance D1 from the firing pin to the foremost 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 outside; the first center line of the inner cylinder is substantially parallel to the second center line of the outer cylinder in the up-down direction.

[0014] In one embodiment, in the front-rear direction, the first center line is located in front of the second center line.

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

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

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

[0018] A nail gun includes: a power assembly including at least a motor and a transmission assembly; a firing assembly including at least a cylinder assembly and a firing pin assembly; a housing assembly including at least a first housing for a user to hold and a second housing for accommodating at least a part of the firing assembly; the cylinder assembly includes at least an inner cylinder and an outer cylinder at least partially exposed 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.

[0019] A nail gun includes: a main body including: a power assembly including at least a motor and a transmission assembly; a firing assembly including at least a cylinder assembly and a firing pin assembly; a housing assembly including at least a first housing for a user to hold and a second housing for accommodating at least a part of the firing assembly; the nail gun further includes: a magazine assembly including at least a magazine for storing nails; wherein, in the up-down direction, the distance D3 from the lowermost end of the holding part of the first housing for a user to hold to the uppermost end of the foremost end of the connection between the magazine assembly and the main body is less than or equal to 60 mm.

[0020] In one embodiment, the nail gun further includes: a driving assembly, the driving assembly at least includes a driving wheel that can rotate in the positive direction to drive the striker assembly; the third center line of the axle of the driving wheel in the front-rear direction is substantially parallel to the motor axis of the motor or the transmission axis of the transmission assembly.

[0021] In one embodiment, the 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 further includes: a trigger, arranged below the first housing and at least partially located within the first housing and / or the second housing; in the up-down direction, the distance D4 from the lowermost end of the trigger to the uppermost end of the frontmost part 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 includes a trigger switch, arranged to be triggered when the trigger is operated; wherein, at least part of the trigger switch is arranged within the second housing.

[0024] In one embodiment, at least part of the trigger switch is arranged within the first housing.

[0025] In one embodiment, at least part of the trigger switch is arranged within the trigger.

[0026] A nail gun, comprising: a power assembly, at least including a motor and a transmission assembly; a firing assembly, at least including a cylinder assembly and a striker assembly; a housing assembly, at least including a first housing for the 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, comprising: a power assembly, at least including a motor and a transmission assembly; a firing assembly, at least including a cylinder assembly and a striker assembly; a housing assembly, at least including a first housing for the user to hold and a second housing for accommodating at least part 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 at least includes an inner cylinder and an outer cylinder with at least part exposed outside; the first center line of the inner cylinder and the second center line of the outer cylinder are substantially parallel in the up-down 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 received in the first housing.

[0033] A nail gun, comprising: a power assembly at least including a motor and a transmission assembly; a firing assembly at least including a cylinder assembly and a firing pin assembly; a housing assembly at least including a first housing for a user to hold and a second housing for accommodating at least a part of the firing assembly; wherein, during the 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 received in the first housing.

[0035] In one embodiment, the nail gun further comprises: a heat dissipation assembly, at least a part of the heat dissipation assembly is disposed in the first housing and / or the second housing, and is configured to dissipate heat from the power assembly.

[0036] In one embodiment, 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.

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

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

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

[0040] In one embodiment, the heat conducting member is at least connected 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 part of the power assembly.

[0043] A nail gun, comprising: a power assembly at least including a motor and a transmission assembly; a firing assembly at least including a cylinder assembly and a firing pin assembly; a housing assembly at least including a first housing for a user to hold and a second housing for accommodating at least a part of the firing assembly; wherein, at least a part of the power assembly is located in the first housing and / or the second housing; the distance D9 from the center of gravity of the nail gun along the vertical direction to the lowermost end of the holding part of the first housing 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 holding part of the first housing.

[0045] In one embodiment, the center of gravity of the nail gun is located below the lowermost end of the holding portion of the first housing.

[0046] A method for repairing a nail gun, the nail gun comprising: a power assembly including at least a motor and a transmission assembly; a firing assembly including at least a cylinder assembly and a firing pin assembly; a housing assembly including at least a first housing for a user to hold and a second housing for accommodating at least a part of the firing assembly; the cylinder assembly including 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, and without removing the housing assembly, the firing pin assembly in the inner cylinder can be disassembled through the upper end opening of the inner cylinder.

[0047] In one embodiment, the inner diameter of the inner cylinder is smaller than the inner diameter of the outer cylinder; in a projection plane perpendicular to the up-down direction, 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 will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

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

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

[0051] Figure 3 is a schematic structural diagram of the nail gun with the overall center of gravity marked from another perspective in one embodiment;

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

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

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

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

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

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

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

[0059] Figure 11 It is a structural schematic diagram of the layout position of the power component in an embodiment;

[0060] Figure 12 It is a structural schematic diagram of the layout position of the power component in an embodiment;

[0061] Figure 13 It is a structural schematic diagram of marking the overall center of gravity of the nail gun from another perspective in an embodiment;

[0062] Figure 14 It is a sectional view of the nail gun structure in an embodiment;

[0063] Figure 15 It is a sectional view of the nail gun structure in an embodiment

[0064] Figure 16 It is an exploded view of a part of the nail gun structure in an embodiment. Detailed implementation manners

[0065] Before explaining any embodiment of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements described in the following description or shown in the above drawings.

[0066] In the present application, the terms "comprising", "including", "having" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0067] In the present application, the term "and / or" is a relationship describing associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the present application, the character " / " generally represents an "and / or" relationship between the associated objects before and after.

[0068] In this application, the terms "connect", "combine", "couple", and "mount" can be direct connections, combinations, couplings, or mounts, or can be indirect connections, combinations, couplings, or mounts. Among them, for example, a direct connection means that two parts or components are connected together without the need for a middleware, and an indirect connection means that two parts or components are respectively connected to at least one middleware, and these two parts or components are connected through the middleware. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and can include electrical connections or couplings.

[0069] In this application, those of ordinary skill in the art will understand that relative terms used in combination with a quantity or condition (such as "about", "approximately", "substantially", etc.) are intended to include the stated value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances caused by manufacturing, assembly, use, etc. associated with a particular value. Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. The relative term can refer to a plus or minus of a certain percentage (such as 1%, 5%, 10% or more) of the indicated value. A numerical value without a relative term should also be disclosed as a specific value with a tolerance. In addition, when "substantially" expresses a relative angular positional relationship (such as substantially parallel, substantially perpendicular), it can refer to a plus or minus a certain number of degrees (such as 1 degree, 5 degrees, 10 degrees or more) based on the indicated angle.

[0070] In this application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0071] In this application, the orientation terms such as "upper", "lower", "left", "right", "front", and "rear" are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that orientation terms such as the upper side, lower side, left side, right side, front side, and rear side not only represent the positive orientation, but can also be understood as the side orientation. For example, the lower side can include directly below, lower left, lower right, lower front, and lower rear, etc.

[0072] The definitions of up, down, left, right, front, and rear in this application can refer to Figures 1 to 6 the orientation shown.

[0073] Figures 1 to 6The nail gun 100 shown includes: a housing assembly 10, a power assembly 20, a driving assembly 30, a firing assembly 40, and a magazine assembly 50. Among them, the power assembly 20 can be a power source for driving the nail gun 100 to drive nails. The power generated by the power assembly 20 can be transmitted to the driving assembly 30, and the driving assembly 30 drives the firing assembly 40 to perform the nail driving action. The magazine assembly 50 is at least used for storing nails.

[0074] In this embodiment, the housing assembly 10 at least includes or forms a first housing 11 for the user to hold, that is, a holding portion, and a second housing 12 that at least houses part of the firing assembly 30. Among them, the first housing 11 extends substantially in the front-rear direction, and the second housing 12 extends substantially in the up-down direction. That is to say, the first housing 11 and the second housing 12 are substantially perpendicular. This embodiment does not make an obvious distinction between the connection between the first housing 11 and the second housing 12. Taking Figures 1 to 6 the orientation shown as an example, the second housing 12 is arranged at the front end of the nail gun 100. When the user holds the holding portion, that is, the first housing 11, to drive nails, the second housing 12 is substantially perpendicular to the horizontal plane.

[0075] As Figures 1 to 5 , the first housing 11 is formed with a battery coupling portion 111, and the battery coupling portion 111 is formed at the rear end of the first housing 11. The included angle α between the installation direction 101 of the battery pack 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 applicable to the nail gun 100. For example, it can be a lithium battery, or a sodium-ion battery, or a lithium iron phosphate battery, etc.

[0076] The power assembly 20 at least includes a motor 21 and a transmission assembly 22. The motor 21 can rotate to generate power to drive the driving assembly 30 to drive the firing assembly 40 to drive nails. In one embodiment, the motor 21 can be a brushed motor, or a brushless motor, or a sensored motor, or a sensorless motor. The transmission assembly 22 can be a transmission gearbox or a set of transmission gears, etc. The transmission assembly 22 is arranged at the front end of the motor 21 and internally has a plurality of gears (not shown) with a certain transmission ratio, which can change the rotational speed transmitted from the motor 21 to the driving assembly 30. In this embodiment, at least part of the transmission assembly 20 is arranged in the first housing 11. Exemplarily, both the motor 21 and the transmission assembly 22 are arranged in the first housing 11, or the motor 21 is arranged in the first housing 11, and part of the transmission assembly 22 is arranged in the first housing 11 and part is arranged at the junction of the first housing 11 and the second housing 12.

[0077] In other embodiments, referring to Figure 11 the power assembly 20 can also be arranged in the second housing 12, and Figure 12 in the motor 11 is arranged in the first housing 11 or at least arranged in the holding portion 110, and the transmission assembly 22 is arranged in the second housing 12.

[0078] As Figure 12 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 external gear ring of the transmission assembly 22 can be used as the housing of the transmission assembly 22, or no shaft lock that affects the diameter of the transmission assembly 22 is provided inside the transmission assembly 22. Thus, the outer diameter of the first housing 11 is smaller, which is convenient for the user to hold.

[0079] It can be understood that a lot of heat will be generated during the operation of the power assembly 20. In order to dissipate heat from 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. Or a phase change material is provided, connected or sprayed at least at some positions of the power assembly 20, and the phase change of the phase change material is used to take away part of the heat, at least to achieve the purpose of reducing the surface temperature of the first housing or for the purpose of reducing the surface temperature of the holding part 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 conducting member can also be connected between the power assembly 20 and the cylinder assembly 41, and the phase change characteristics of the phase change heat conducting member are 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 conducting member can also be connected between the motor 21 and the cylinder assembly 41, such as connecting a copper sheet, 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 conducting member is connected between the transmission assembly 22 and the cylinder assembly 41. In other embodiments, metal heat conducting members and / or phase change heat conducting members can also be respectively connected between the motor 21 and the cylinder assembly 41, and between the transmission assembly 22 and the cylinder assembly 41.

[0080] As Figure 5 shown, a heat conducting member 23 is connected between the transmission assembly 22 and the cylinder assembly 41, which can be, for example, a metal heat conducting member or a phase change heat conducting member. In some embodiments, at least one end of the heat conducting member 23 can be connected to the surface of the motor 21 or the surface of the transmission assembly 22, and the other end can be connected to the surface of the inner cylinder 411, or connected to the surface of the outer cylinder 412, or connected to the second housing 12, or connected to the bracket inside the second housing 11, or connected to a metal part in the nail gun 100 far from the power assembly 20, such as a nail rail for ejecting nails. Of course, other connection methods can also be used to connect the heat conducting member 23, which will not be listed one by one here.

[0081] In this embodiment, the heat dissipation fan, the phase change heat conduction member, or the metal heat conduction member can all be referred to as the heat dissipation component for dissipating heat from the power component 20. It can be understood that at least one of the above heat dissipation components can be used to dissipate heat from the power component 20, or other types of heat dissipation components can be used to dissipate heat from the power component 20 on the basis of basically not affecting the size of the holding portion 110, which will not be 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 holding 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 holding 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 component 20 is transmitted to the driving component 30, and the driving component 30 can drive the firing component 40 to drive nails. Among them, the driving component 30 at least includes a driving wheel 31, and the driving wheel 31 is the same as the driving wheel in the prior art, which will not be elaborated here.

[0084] The firing component 40 at least includes a cylinder component 41 and a firing pin component 42. Among them, at least part of the firing pin component 42 is located inside the cylinder component 41. In this embodiment, the cylinder component 41 at least includes an inner cylinder 411 and an outer cylinder 412.

[0085] In one embodiment, as Figures 4 to 12 shown, at least part of the inner cylinder 411 is sleeved inside the outer cylinder 412. For example, at least the upper end of the inner cylinder 411 is arranged inside the outer cylinder 412. An inflation nozzle 4121 is arranged at the top or upper end of the outer cylinder 412 for pre-inflating gas into the cylinder component 41. The pre-inflated gas stores a large amount of kinetic energy in a compressed state and can push the firing pin component 42 to drive out the nails. In this embodiment, without special circumstances, during the operation of the nail gun 100, the inflation nozzle 4121 is not opened, there is no gas exchange between the cylinder component 41 and the outside world, and the pre-inflated gas in the cylinder component 41 can passively do work to generate the kinetic energy for pushing the firing pin component 42. In one embodiment, an air inlet nozzle and an air outlet nozzle can also be arranged on the outer cylinder 412, and there is no need for pre-inflated gas, and gas can be filled during the operation of the nail gun 100. In this embodiment, the firing pin component 42 at least includes a firing pin 421 and a piston 422 installed at the top end of the firing pin 421, and the piston 422 is installed inside the inner cylinder 411.

[0086] In one embodiment, as Figure 14 shown, at least part of the inner cylinder 411 is arranged inside the second housing 12, at least part of the outer cylinder 412 is exposed outside the second housing 12, and at least the inner cylinder 411 is not arranged inside the outer cylinder 412.

[0087] In one embodiment, referring to Figure 14 andFigure 15 , the inner cylinder 411 communicates with the outer cylinder 412 through an intermediate member 413. The intermediate member 413 is at least partially disposed within the inner cylinder 411, and the outer cylinder 412 is entirely exposed outside the second housing 12. The projections of the inner cylinder 411 and the outer cylinder 412 in a projection plane perpendicular to the left - right direction do not overlap. In this embodiment, the intermediate member 413 may be integrally formed with the inner cylinder 411 or removably mounted to the inner cylinder 411.

[0088] In this embodiment, the upper opening of the inner cylinder 411 is disposed opposite and in contact with the lower opening of the outer cylinder 412, at least ensuring that the gas entering through the inflation nozzle 4121 of the outer cylinder 412 can enter the inner cylinder 411. Moreover, the projections of the inner cylinder 411 and the outer cylinder 412 in a plane perpendicular to the left - right direction do not overlap, so as to ensure that the gas rushed into the outer cylinder 412 can quickly enter the inner cylinder 411.

[0089] In this embodiment, since the outer cylinder 412, or rather its outer surface, is entirely 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 striker assembly 42 disposed within the inner cylinder 411, as Figure 16 shown. When the striker 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 striker assembly 42 within the inner cylinder 411. Then, the striker assembly 42 can be directly pulled out upward from the inner cylinder 411 for quick replacement. In this embodiment, the fasteners may be screws.

[0090] In some embodiments, the housing assembly 10 may further include an outer cylinder cover, which can be used to wrap part or all of the outer surface of the exposed outer cylinder 412, especially the places that are vulnerable to damage, such as the top of the outer cylinder 412. The outer cylinder cover can be fixed to the outer cylinder 412 or to the housing assembly 10 through a plurality of fasteners. By removing the outer cylinder cover, the outer cylinder 412 can be exposed, and then the outer cylinder 412 can 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 within the cylinder assembly 41 can be reduced through an algorithm, or the gas within the cylinder assembly 41 can be released by opening the inflation nozzle 4121 on the outer cylinder 412 to reduce the air pressure within the cylinder assembly 41. This can ensure the 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 terms "inner" and "outer" are only used to distinguish and name the cylinders. It is also possible to refer to the inner cylinder 411 as the driving cylinder and the outer cylinder 412 as the storage cylinder.

[0094] Next, the nail driving process of a single nail driving cycle of the nail gun 100 will be described in conjunction with each component within the firing assembly 40. After the nail gun 100 stops, the motor 21 stops outputting power, and finally the striker assembly 42, or rather the striker 421, stops at the initial position, and the pre-charged gas within the cylinder assembly 41 is in a compressed state. When the nail gun 100 is powered on and the motor 21 is started, the motor 21 outputs power, and the striker assembly 42 is released and instantaneously obtains a large acceleration, moving from the initial position to the firing position and driving out the nails stored within the magazine assembly 50. After driving out the nails, the striker assembly 42 returns from the firing position to the initial position under the drive of the motor 21 and stops. During this process, the striker assembly 42, or rather the piston 422, can continuously compress the gas within the cylinder assembly 41, or rather the gas within the inner cylinder 411. Since the inner cylinder 411 and the outer cylinder 412 are in communication, the gas within the outer cylinder 412 is also compressed. The process from when the motor 21 is powered on, i.e., when the nail gun 100 starts, to after driving the nails, until the striker assembly 42 returns to the initial position or near the initial position, i.e., the stop position, is referred to as a single nail driving 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 thus can also be referred to as the stop position. The farthest position that the striker assembly 42 can move upward can be referred to as the top dead center, and the farthest position that it can move downward is referred to as the bottom dead center. Among them, the firing position and the bottom dead center can 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 to say, the distance between the initial position and the top dead center is greater than zero.

[0095] In this embodiment, both the inner cylinder 411 and the outer cylinder 412 are basically cylindrical or circular cylindrical structures. As 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 to say, the first center line 401 and the second center line 402 do not coincide, the inner cylinder 411 is offset within the outer cylinder 412, and the inner cylinder 411 is disposed near the front end of the outer cylinder 412. Thus, the first center line 401 is also closer to the foremost end of the second housing 12. In this embodiment, the piston 422 is substantially a cylindrical structure and is disposed within the inner cylinder 411, and the firing pin 421 is substantially mounted at the center point of the piston 422. Therefore, the first center line 401 is also substantially the center line of the firing pin 421. It can be understood that when the nail gun 100 drives a nail, the intersection point of the center line of the firing pin 421 and the workpiece 200 is substantially the nail exit position. That is to say, the installation position of the inner cylinder 411 within the outer cylinder 412 is related to the nail exit position of the nail gun 100. When there is a wall surface or other obstacles in the front to block, the closer the nail exit position of the nail gun 100 is to the front, the smaller the edge distance of the nail gun 100 driving a nail, and the better the nail driving effect of the nail gun 100 at the corner or the turning point. Among them, the edge distance can be understood as the distance between the nail driving position and the front blocking object (for example, the wall surface).

[0096] Since the foremost end of the second housing 12 can be understood as the foremost end of the nail gun 100 when the nail gun 100 drives a nail, even if there are obstacles blocking the front end of the nail gun 100, at least the foremost end of the second housing 12 needs to contact the obstacle for the nail gun 100 to drive a nail. Refer to Figure 4 , assuming that there is a blocking object 300 blocking the front of the nail gun 100, the nail gun 100 can drive a nail at the farthest position H forward, that is, the nail driving position point H is substantially the intersection point of the first center line 401 and the workpiece 200. Thus, the distance D1 from the first center line 401 to the foremost end of the second housing 12 can be understood as the above-mentioned edge distance. In other embodiments, the distance from a position close to or adjacent to the first center line 401 to the foremost end of the second housing 12 can also be understood as the edge distance. Since the inner cylinder 411 is offset forward within the outer cylinder 412, to a certain extent, the edge distance of the nail gun 100 driving a nail is shortened, ensuring the nail driving effect of the nail gun at special positions.

[0097] In this embodiment, thus, the distance D1 from the first center line 401 to the foremost end of the second housing 12, or the edge distance, is less than or equal to 40 mm. Since the first center line 401 is substantially the center line of the firing pin 421, it can also be understood that the distance from the firing pin 421 to the foremost end of the second housing 12 is less than or equal to 40 mm. In other embodiments, the value of the distance D1 can be any number within less than or equal to 35 mm, or any number less than or equal to 30 mm, etc.

[0098] In this embodiment, at least a part of the outer surface of the outer cylinder 412 is exposed outside the second housing 12, that is, the outer cylinder 412 is not entirely within the second housing 12. Refer to Figure 4 and Figure 5 , most of the second cylinder 412 is exposed to the outside, thus reducing the installation range of the housing 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 beneficial to obtaining a better nailing effect during nailing operations at corners or turns.

[0099] In this embodiment, the outer surface area of the outer cylinder 412 exposed outside the second housing 12 accounts for at least 20% of the total outer surface area of the outer cylinder 412, or at least 30%, or 40%, or 50%, or 60%, or 70%, etc. of the total outer 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, no housing is provided at the front end of the outer cylinder 412, so as to avoid the housing outside the outer cylinder 412 increasing the edge distance of the nail gun 100. A large amount of the outer cylinder 412 being exposed outside the second housing 12 greatly saves the setting of the cylinder outer housing, at least reduces the usage amount of the second housing 12, and thus reduces the overall weight of the nail gun 100.

[0100] In this embodiment, in order to protect the outer cylinder 412 exposed outside, at least a protective layer 4122 is provided on the outer surface of the outer cylinder 412 exposed outside. Exemplarily, the protective layer 4122 can be one or more layers of polyurea coating. In other embodiments, a metal protective layer, a plastic protective layer, or a protective layer with elasticity or cushioning can also be used, which will not be listed one by one here.

[0101] In the up and down direction, the power assembly 20 and the drive assembly 30 are not on the same horizontal plane. In this embodiment, along the front and back direction, the third center line 301 of the wheel axle of the drive wheel 31 is substantially parallel to and does not coincide with the motor axis 201 of the motor 21. In one embodiment, as 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 substantially coincides with the central axis of the transmission assembly 22. Therefore, in some implementation manners, 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 them is also substantially the same as D2.

[0102] In this embodiment, a transmission assembly 60 is further provided between the power assembly 20 and the driving assembly 30. Specifically, a transmission assembly 60 is provided between the transmission assembly 22 and the driving wheel 31 to transmit power to the driving wheel 31. In this 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 the output end of the transmission assembly 22, and a second transmission wheel 63 connected or coupled to the output end of the driving assembly 30. Among them, the flexible transmission member 61 can be a synchronous belt, a chain or a multi-wedge belt, etc. To prevent the firing pin 421 from slipping from the initial position after the nail gun 100 stops, the driving assembly 30 further includes a one-way clutch structure 32 provided at the rear end of the driving wheel 31. The one-way clutch structure 32 can prevent the driving wheel 31 from being driven by the firing pin 421 to rotate in the reverse direction, so as to prevent the firing pin 421 from accidentally falling from the initial position when no nail is being driven. In this application, it is defined that when the driving assembly 30 or the driving wheel 31 rotates in the positive direction, it can drive the firing pin assembly 42 to drive nails, and the direction opposite to the positive direction is defined as the reverse direction. For example, when the driving wheel 31 rotates counterclockwise, the nail gun 100 works normally, then 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 driving wheel 31 from rotating clockwise after the nail gun 100 stops. The working principle of the one-way clutch structure 32 in this application is basically the same as that in the prior art, and will not be elaborated here. In other embodiments, the one-way clutch structure 32 can also be provided at other positions, such as at the front end of the driving wheel 31. In one embodiment, the one-way clutch structure 32 can be a one-way bearing.

[0103] In other embodiments, an axle lock can also be provided inside the transmission assembly 22 and the radial dimension of the axle lock is not greater than the outer diameter of the transmission assembly 22. The axle lock is also used to prevent the driving wheel 31 from rotating in the reverse direction after the nail gun 100 stops.

[0104] Refer to Figure 6 , in the entire transmission system of the nail gun 100, after the motor 21 is powered on, it rotates 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. Furthermore, 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 drive nails within a nail driving cycle and stop at the initial position.

[0105] In this embodiment, by using the transmission assembly 60 with the flexible transmission member 61 to realize the transmission from the power assembly 20 to the driving assembly 30, while reducing the weight of the whole machine, the number of components inside the machine body is also simplified, the installation is simplified, and the vibration transmitted from the cylinder assembly 41 to the transmission assembly 22 is greatly reduced.

[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 magazine assembly 50 is disposed substantially parallel to the first housing 11 at the lowermost end of the nail gun 100, that is to say, the magazine assembly 50 is substantially disposed in the front-rear direction. As an alternative embodiment, the magazine assembly 50 is further provided with a window 51 through which the user can observe the remaining nails. The window 51 is provided as one or more notches on the magazine assembly 50. On the one hand, it allows the user to view the remaining amount of nails, and on the other hand, it also allows for simple maintenance of the magazine assembly 50 without the user disassembling the magazine assembly 50. In this embodiment, the magazine assembly 50 further includes a magazine switch 52 for the user to disassemble the magazine. In other embodiments, the magazine assembly 50 may also have an angle less than 90° with the first housing 11 in the front-rear direction, that is to say, the magazine assembly 50 is not parallel to the first housing 11 in the front-rear direction.

[0108] In this embodiment, as Figure 4 shown in the up-down direction, the distance D3 from the lowermost end of the first housing 11 to the uppermost end of the magazine assembly 50 is less than or equal to 60 mm. For example, it may be 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, making the first housing 11, i.e., the holding portion 110, closer to the lower end of the whole machine, that is, closer to the magazine assembly 50, and further reducing the center of gravity of the whole machine, making the operation of the whole machine better. In addition, by disposing the power assembly 20 within the first housing 11, the housing assembly required for separately placing the power assembly 20 is reduced, thereby further reducing the weight of the whole machine. In one embodiment, the housing assembly 10 further includes a reinforcing housing 13, and the reinforcing housing 13 can further strengthen the connection between the first housing 11 and the second housing 12, thereby enhancing the structural strength of the whole machine. In one embodiment, the reinforcing housing 13 can be at least partially connected or mounted on the magazine assembly 50. In the up-down direction, the distance D4 from the lowermost end of the holding portion 110 of the first housing 11 for the user to hold to the uppermost 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. Among them, the holding portion 110 does not at least include the battery coupling portion 111. Or it can be defined that the portion of the first housing 11 whose extension direction is substantially in the front-rear direction is the holding portion 110.

[0109] In other embodiments, the reinforcing housing 13 may not be provided to further reduce the influence of the housing assembly 10 on the weight of the whole machine. In some embodiments, an elastic member or a connecting member with a shock-absorbing effect may be used to connect between the battery coupling portion 111 and the magazine assembly 50.

[0110] In this embodiment, the nail gun 100 further includes a trigger 70. The trigger 70 is disposed below the first housing 11 and at least partially located within the first housing 11 or the second housing 12 or at the junction of the first housing 11 and the second housing 12. The trigger 70 is arranged to be operated (e.g., pressed) by the user to trigger a trigger switch 71 within the housing assembly 10. In one embodiment, as Figure 7 shown, the trigger switch 71 is at least partially disposed within the second housing 12 and is located on the left side of the transmission assembly 60, effectively utilizing the spatial structure within the second housing 12. When the trigger 70 is operated, the trigger switch 71 can be triggered by an intermediate member or the trigger 70 itself. In one embodiment, as Figure 8 shown, the trigger switch 71 is at least partially disposed within 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 reaches a position by ribs or other settings within the housing assembly 10. By disposing the trigger switch 71 within 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 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 can be a micro switch or an electronic switch.

[0111] In this embodiment, the distance D5 from the lowermost end of the trigger 70 to the uppermost 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 lowermost end of the trigger 70 to the uppermost end of the reinforcement housing 13 is less than or equal to 40 mm, or less than or equal to 35 mm, etc.

[0112] In this embodiment, the part other than the magazine assembly 50 is defined as the main body 1 of the nail gun 100. Then, in the up and down direction, the distance D8 between the uppermost end of the foremost end of the magazine assembly 50 and the lowermost end of the holding portion 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] Referring to Figure 2 and Figure 5 , the nail gun 100 is further 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 firing working mode or a single firing working mode. The mode selection module 80 can be disposed at the upper end of the battery coupling portion 111 formed at the rear end of the first housing 11, or disposed on the reinforcement housing 13, or at any other position convenient for the user to operate and observe.

[0114] In one embodiment, a mode switch 81, mode option buttons 82, and a mode display interface 83 are provided on the mode selection module 80. Among them, the mode switch 81 and the mode option buttons 82 require user operation, while the mode display interface 83 can display the current working mode. To facilitate the selection of the working mode when operating the nail gun 100 or holding the nail gun 100, generally the mode switch 81 and the mode option buttons 82 are arranged on the same side of the mode selection module 80. Common arrangement methods, such as Figure 9 and Figure 10 shown in the elongated arrangement, or square arrangement, or triangular arrangement in other embodiments. Refer to Figure 2 and Figure 3 , in the front-back direction and up-down direction, the first housing 11 has a central plane 11A, and the central plane 11A can basically also serve as the central plane of the nail gun 100 in the front-back direction and up-down direction. In this embodiment, as Figure 2 shown, the mode selection module 80 is installed on the reinforcement housing 13, and the arrangement direction 801 of the mode switch 81 and the mode option buttons 82 is basically parallel to the central plane 11A.

[0115] In this embodiment, since the first housing 11 is closer to the magazine assembly 50 or the holding part is lower, as Figure 2 shown, the distance D7 from the center of gravity G of the whole nail gun 100 to the central 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 basically located below the first housing 11. In the front-back direction, the center of gravity G is basically located at the position of the trigger 70 or on the trigger 70. In the left-right direction, the center of gravity G can be on the left or right side of the central plane 11A.

[0116] In one embodiment, as Figure 13 shown, the distance D9 from the center of gravity G of the whole nail gun 100 to the lowest end of the holding part 110 in the up-down 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. Thus, when holding the nail gun 100 to drive nails into a vertically placed workpiece such as a vertical wall surface, the center of gravity of the whole nail gun is closer to the hand, thus saving more effort. It can be understood that the center of gravity G can be as Figure 13 shown above the lowest end of the holding part 110, or below the lowest end of the holding part 110, or exactly at the lowest end of the holding part 110.

[0117] In this embodiment, in the case where the battery pack is not installed, at least by reducing the second housing 12 outside the outer cylinder 412 and arranging the power assembly 20 inside the first housing 11, the housing required for separately placing the power assembly 20 can be reduced, and the overall weight of the nail gun 100 can be controlled within the range of less than or equal to 2 kg. In one embodiment, the overall weight range of the nail gun 100 is less than or equal to 1.8 kg. In one embodiment, the overall weight range of the nail gun 100 is less than or equal to 1.5 kg. In one embodiment, the overall weight range of the nail gun 100 is less than or equal to 1 kg.

[0118] The foregoing has shown and described 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. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present application.

Claims

1. A nail gun, comprising: A main body, comprising: A power assembly, at least comprising a motor and a transmission assembly; A firing assembly, at least comprising a cylinder assembly and a firing pin assembly; The cylinder assembly at least comprises an inner cylinder and an outer cylinder, and the inner cylinder communicates with the outer cylinder; At least part of the firing pin assembly is located inside the inner cylinder; A housing assembly, at least comprising a first housing for the user to hold and a second housing for accommodating at least part of the firing assembly; The nail gun further comprises: A magazine assembly, at least comprising a magazine for storing nails; Characterized in that, in the up-down direction, the distance D3 from the lowermost end of the holding part of the first housing for the user to hold to the uppermost end of the foremost end of the connection between the magazine assembly and the main body is less than or equal to 60 mm.

2. The nail gun according to claim 1, characterized in that, The nail gun further comprises: a driving assembly, the driving assembly at least comprising a driving wheel that can rotate in the positive direction to drive the firing pin assembly; in the front-rear direction, the third center line of the axle of the driving wheel is substantially parallel to the motor axis of the motor or the transmission axis of the transmission assembly.

3. The nail gun according to claim 2, wherein, The distance D2 between the third center line and the motor axis is less than or equal to 80 mm.

4. The nail gun according to claim 1, characterized in that, The nail gun further comprises: a trigger, arranged below the first housing and at least part of it is located inside the first housing and / or the second housing; in the up-down direction, the distance D4 from the lowermost end of the trigger to the uppermost end of the foremost end of the connection between the magazine assembly and the main body is less than or equal to 50 mm.

5. The nail gun according to claim 1, characterized in that, The nail gun further comprises a trigger switch, arranged to be triggered when the trigger is operated; wherein, at least part of the trigger switch is arranged inside the second housing.

6. The nail gun according to claim 5, characterized in that, At least part of the trigger switch is arranged inside the first housing.

7. The nail gun according to claim 5, characterized in that, At least part of the trigger switch is arranged inside the trigger.

8. The nail gun according to claim 1, wherein In the up-down direction, the first center line of the inner cylinder is substantially parallel to the second center line of the outer cylinder.

9. The nail gun according to claim 8, wherein, At least 20% of the outer surface of the outer cylinder is exposed outside the second housing.

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

11. The nail gun according to claim 1, characterized in that, The nail gun further comprises: a heat dissipation assembly, at least part of the heat dissipation assembly is arranged inside the first housing and / or the second housing, and is arranged to dissipate heat from the power assembly.

12. The nail gun according to claim 11, characterized in that, The heat dissipation assembly comprises a heat conducting member, and the heat conducting member is arranged to conduct at least part of the heat of the power assembly.

13. The nail gun according to claim 12, characterized in that, The heat conducting member is at least connected between the motor and the cylinder assembly.

14. The nail gun according to claim 12, characterized in that, The heat conducting member is at least connected between the transmission assembly and the cylinder assembly.

15. The nail gun according to claim 12, characterized in that, The heat conducting member is at least connected between the motor and the second housing.

16. The nail gun according to claim 12, characterized in that, The heat conducting member is at least connected between the transmission assembly and the second housing.

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