Fastener driver

Abstract

A fastener driver, comprising: a striking assembly, which comprises a striking member configured to strike a fastener; a housing assembly, which at least comprises a first housing for accommodating an energy storage system and a second housing for an operator to hold; a battery pack, which is mounted at the tail end of the second housing; an electric motor, which is configured to rotate around a first axis to generate a driving force so as to drive the energy storage system to store energy; and a transmission assembly, which is configured to transmit the driving force of the electric motor. The electric motor and at least part of the transmission assembly are arranged in the second housing, and an included angle between the mounting direction of the battery pack and the first axis is greater than or equal to 75° and less than or equal to 150°.

Description

Fastener driver

[0001] This application claims priority to Chinese Patent Application No. 202510108189.4, filed with the Chinese Patent Office on January 22, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of power tool technology, and for example to a fastener driver. Background Technology

[0003] Fastener actuators in related technologies can drive fasteners such as nails into workpieces. For example, a nail gun is a type of fastener actuator. Nail guns can be categorized by their operating principle into mechanical nail guns and cylinder nail guns. Mechanical nail guns can be further categorized by their energy storage method into spring-type, flywheel-type, and friction wheel-type, while cylinder nail guns can be categorized by their energy storage method into positive pressure energy storage and negative pressure energy storage, and by the number of cylinders they contain into single-cylinder or double-cylinder structures.

[0004] The aforementioned fastener actuators typically have a clip for loading nails on the front side, and the housing contains various components such as a motor, transmission, and firing mechanism. The reasonable adjustment of the overall center of gravity of the machine requires complex design considerations; otherwise, the operator will have to exert a lot of effort to maintain the machine's balance when using the fastener actuator, and will feel fatigued after continuous operation, resulting in poor work efficiency and user experience.

[0005] This section provides background information related to this application, which is not necessarily prior art. Summary of the Invention

[0006] One objective of this application is to solve or at least alleviate some or all of the aforementioned problems. To this end, this application provides a fastener driver. The technical solution adopted in this application is as follows:

[0007] A fastener driver includes: a striking assembly including a striking member configured to strike a fastener; a housing assembly including at least a first housing housing an energy storage system and a second housing for an operator to hold; a battery pack mounted at the tail end of the second housing; a motor configured to rotate about a first axis to generate a driving force to drive the energy storage system to store energy; and a transmission assembly configured to transmit the driving force of the motor; wherein the motor and at least a portion of the transmission assembly are disposed within the second housing, and the angle between the mounting direction of the battery pack and the first axis is greater than or equal to 75° and less than or equal to 150°.

[0008] In some embodiments, the striking direction of the striking element forms a first plane with the first axis, and the mounting direction of the battery pack is substantially parallel to the first plane.

[0009] In some embodiments, the striking direction of the striking element forms a first plane with the first axis, and the mounting direction of the battery pack is substantially perpendicular to the first plane.

[0010] In some embodiments, a magazine assembly is also included, configured to receive a plurality of fasteners; the magazine assembly at least partially overlaps with the projection of the battery pack in a second plane perpendicular to the direction of impact.

[0011] In some embodiments, the device further includes a fan housed within the second housing and disposed at the rear end of the motor; an air outlet disposed in the second housing corresponding to the position of the fan; and an air inlet disposed in the second housing in front of the transmission assembly. The fan is configured to rotate with the motor, driving the cooling airflow to flow in from the air inlet, and then flow along the second housing from front to back through the motor before exiting from the air outlet.

[0012] In some embodiments, it further includes: a switch for an operator to start the motor; an air outlet disposed on a second housing behind the motor; the lower operating surface of the switch has an upper end point in the vertical direction, and the distance between the upper end point and the air outlet in the first axial direction is greater than or equal to 85 mm and less than or equal to 120 mm.

[0013] In some embodiments, a heat insulation element is provided around the motor, and the thermal conductivity of the material of the heat insulation element is at least different from the thermal conductivity of the second housing around the motor.

[0014] In some embodiments, the thermal conductivity of the insulation material is different from that of the motor stator material.

[0015] In some embodiments, the outer diameter of the motor is less than or equal to 38 mm.

[0016] In some embodiments, the output power of the motor is greater than or equal to 350W.

[0017] In some embodiments, the energy storage system includes a cylinder, a striking element partially housed within the cylinder, and a piston disposed at the top of the cylinder and fixing the striking element.

[0018] A fastener driver includes: a striking assembly including a striking member configured to strike a fastener; a housing assembly including at least a first housing housing an energy storage system and a second housing for an operator to hold; a battery pack mounted at the tail end of the second housing; a motor configured to rotate about a first axis to generate a driving force to drive the energy storage system to store energy; and a transmission assembly configured to transmit the driving force of the motor; wherein the motor and at least a portion of the transmission assembly are disposed within the second housing, and the angle between the bottom plane of the battery pack and the first axis is greater than or equal to 75° and less than or equal to 150°.

[0019] In some embodiments, the striking direction of the striking element forms a first plane with the first axis, and the bottom plane of the battery pack is substantially perpendicular to the first plane.

[0020] A fastener actuator includes: a striking assembly including a striking member configured to strike a fastener; a magazine assembly configured to accommodate a plurality of fasteners; a housing assembly including at least a first housing accommodating an energy storage system and a second housing for an operator to hold; a battery pack mounted at the rear end of the second housing; a motor configured to rotate about a first axis to generate a driving force to drive the energy storage system to store energy; and a transmission assembly configured to transmit the driving force of the motor; wherein the motor and at least a portion of the transmission assembly are disposed within the second housing; the striking direction of the striking member forms a first plane with the first axis, and the mounting direction of the battery pack is substantially perpendicular to the first plane; in a second plane perpendicular to the striking direction, the projections of the battery pack and the magazine assembly at least partially coincide.

[0021] In some embodiments, a drive mechanism is also included, configured to be driven by a motor to rotate about a second axis to drive the striking element to move in the opposite direction of the striking direction so that the energy storage system stores energy.

[0022] In some embodiments, the second axis is substantially parallel to the first axis, and the distance between the second axis and the first axis is greater than or equal to 40 mm and less than or equal to 80 mm.

[0023] In some embodiments, a transmission mechanism is further included, configured to transmit the power output by the transmission component to the drive mechanism; the projection of the transmission mechanism falls within the projection range of the energy storage system in a third plane perpendicular to the first axis.

[0024] In some embodiments, the transmission mechanism includes one or more of chain drive, belt drive, and gear drive.

[0025] In some embodiments, the reduction ratio of the transmission mechanism is greater than or equal to 0.5 and less than or equal to 1.

[0026] In some embodiments, the speed ratio of the transmission mechanism is greater than or equal to 1 and less than or equal to 1.5.

[0027] A fastener driver includes: a striking assembly including a striking member configured to strike a fastener; a housing assembly including at least a first housing housing an energy storage system and a second housing for an operator to hold; a battery pack mounted at the rear end of the second housing; a motor configured to rotate about a first axis to generate driving force to drive the energy storage system to store energy; and a transmission assembly configured to transmit the driving force of the motor; wherein the driver further includes: a fan housed within the second housing and disposed at the rear end of the motor; an air outlet disposed in the second housing corresponding to the position of the fan; and an air inlet disposed in the second housing in front of the transmission assembly; the fan is configured to rotate with the motor, driving cooling airflow to flow in from the air inlet, and then flow along the second housing from front to back through the motor and out from the air outlet. Attached Figure Description

[0028] Figure 1 is a perspective view of a fastener driver as an embodiment of this application;

[0029] Figure 2 is a cross-sectional view of the fastener driver shown in Figure 1;

[0030] Figure 3 is a cross-sectional view of the fastener driver and its battery pack shown in Figure 1;

[0031] Figure 4 is a perspective view of the motor, transmission components, transmission mechanism, drive mechanism, and energy storage system in a fastener driver according to one embodiment of this application;

[0032] Figure 5 is a perspective view of the fastener driver and its battery pack as another embodiment of this application;

[0033] Figure 6 is a schematic diagram of the first plane of the fastener driver shown in Figure 5 and the bottom plane of the battery pack after installation;

[0034] Figure 7 is a schematic diagram of the fastener driver and its battery pack shown in Figure 6 projected in a second plane perpendicular to the impact direction.

[0035] Figure 8 is a schematic diagram of the transmission mechanism and energy storage system of the fastener driver in an embodiment of this application, projected in a third plane perpendicular to the first axis of the motor.

[0036] Figure 9 is a perspective view of the internal structure of the fastener driver portion as another embodiment of this application. Detailed Implementation

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

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

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

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

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

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

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

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

[0045] In this application, the terms "device," "module," or "unit" are used to describe devices that can be implemented in hardware or software to perform a specific function.

[0046] In this application, the terms “calculation,” “judgment,” “control,” “determine,” “identify,” etc., refer to the operation and process of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0047] The benefits, other advantages, and solutions to problems will be described below with reference to specific embodiments. However, these benefits, advantages, solutions to problems, and any features that may lead to or make any benefit, advantage, or solution appear or become more significant should not be construed as key, necessary, or essential features of any or all claims.

[0048] As described in the background section, one type of fastener actuator in the related technology can be a mechanical nail gun, a cylinder nail gun, etc., which can drive fasteners such as nails into workpieces. Due to its many components and complex structure, how to reasonably arrange the arrangement of the various components of the fastener actuator is of great significance for balancing the center of gravity of the whole machine, optimizing the grip, and improving work efficiency.

[0049] Referring to Figures 1 through 9, a fastener driver 100 is shown as one of several embodiments of this application. Exemplarily, the fastener driver 100 shown in the figures is a nail gun. Furthermore, the figures also define six directions in this application: up, down, front, back, left, and right.

[0050] The fastener driver 100 described above may include a housing assembly 10, a motor 20, a transmission assembly 30, a striking assembly 40, a magazine assembly 50, and a battery pack 200. The housing assembly 10 constitutes the main external structure of the fastener driver 100 and has an internal accommodating space. The housing assembly 10 can support, fix, and accommodate other components of the fastener driver 100. For example, the housing assembly 10 of the fastener driver 100 in this application includes at least a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 can be separate components with a connecting relationship or can be integrally formed. Each of the first housing 11 and the second housing 12 has an accommodating space. For clarity, the internal accommodating space formed by the first housing 11 is referred to as the first accommodating space, and the internal accommodating space formed by the second housing 12 is referred to as the second accommodating space. The first housing 11 extends along a first direction 101, and its first accommodating space at least accommodates an energy storage system 300. The second housing 12 extends along the second direction 102, providing a grip for the operator, thus forming the grip portion of the fastener driver 100. The first direction 101, where the first housing 11 is located, intersects with the second direction 102, where the second housing 12 is located. In some embodiments, the first housing 11 and the second housing 12 are substantially perpendicular, that is, the angle between the first direction 101 and the second direction 102 is approximately 90°. As shown in Figures 1 to 3, the first housing 11 extends substantially vertically, and the second housing 12 extends substantially forward-backward. When the operator holds the second housing 12 and uses the nail gun to drive nails, the first housing 11 is substantially perpendicular to the working plane.

[0051] The battery pack 200 is the energy source for the fastener driver 100, providing electrical energy to components such as the motor 20. In this application, the battery pack 200 is installed at the tail or end of the second housing 12; that is, the tail or end of the second housing 12 is provided with a battery mounting portion 121, which can be connected to the battery pack 200 via terminal coupling or other means. As shown in Figures 1 to 3, the second housing 12 extends in the front-to-back direction, and the battery pack 200 can be coupled to the battery mounting portion 121 at the rear end of the second housing 12 along the mounting direction 103. This application does not limit the specific type of battery pack 200 used in the fastener driver 100. In some embodiments, it can be a ternary lithium battery, a lithium iron phosphate battery, or a sodium-ion battery, etc. It is understood that the design of the battery cells, brackets, interfaces, waterproof seals, heat dissipation, power management, etc., of the battery pack 200 is not the focus of this application, and other overall or partial mechanical and electrical characteristics are not specifically limited.

[0052] The motor 20 is the prime mover of the fastener driver 100, capable of rotating around the first axis 201 under the power supply of the battery pack 200, thereby generating a driving force to drive the energy storage system 300 to store energy. In this application, the motor 20 is housed within the second receiving space of the second housing 12, thereby achieving better balance with the magazine assembly 50 arranged on the lower side of the housing assembly 10, making the grip or handle position of the fastener driver 100 more aligned with the center of gravity position. In some embodiments, the first axis 201 of the motor 20 may be aligned with the extending direction 102 of the second housing 12, for example, along the front-rear direction. In some embodiments, the motor 20 may be a brushless motor 20 or a brushed motor 20. In some embodiments, the motor 20 may be a sensorless motor 20 or a sensored motor 20. In some embodiments, the motor 20 may be an internal rotor motor 20 or an external rotor motor 20. In some embodiments, the outer diameter of the motor 20 may be less than or equal to 38 mm, or less than or equal to 36 mm, or less than or equal to 33 mm, or less than or equal to 30 mm, to ensure that the motor 20 is housed in the second housing 12 and meets the size requirements for a person to hold the second housing 12. In some embodiments, the motor 20 maintains the output performance required by the fastener driver 100 while having size limitations, and the output power of the motor 20 is greater than or equal to 350 W, or greater than or equal to 400 W, or greater than or equal to 500 W.

[0053] Motor 20 is the starting point for converting electrical energy from battery pack 200 in fastener driver 100 into nail-driving mechanical energy. Transmission assembly 30 can further transmit the driving force generated by motor 20 to striking assembly 40. In this application, at least a portion of transmission assembly 30, like motor 20, is housed within the second receiving space of second housing 12 for further utilization of the second receiving space. In some embodiments, transmission assembly 30 may include gears connected to the shaft of motor 20. These gears may be housed within gearbox 31, which is at least partially housed within the aforementioned second receiving space. In some embodiments, both motor 20 and gearbox 31 may be disposed entirely within the second receiving space of second housing 12.

[0054] In one alternative implementation, to stabilize the overall center of gravity and improve the ergonomics of the fastener driver 100, its center of gravity position is further optimized when the battery pack 200 is installed. As shown in Figure 3, the battery pack 200 is inserted and removed from the end of the second housing 12 along the installation direction 103. The angle θ between the installation direction 103 and the first axis 201 of the motor 20 inside the second housing 12 is greater than or equal to 75° and less than or equal to 150°. The angle θ between the installation direction 103 and the first axis 201 is defined as the angle traversed when the battery pack 200 is installed / inserted into the fastener driver 100 and rotates clockwise along the straight line 103 until it coincides with the first axis 201. For example, as shown in FIG3, the included angle θ is the angle through which the ray on the mounting direction 103, with the intersection of the straight line 103 and the first axis 201 as its endpoint and pointing downwards, rotates clockwise until it coincides with the ray on the first axis 201, with the intersection of the straight line 103 and the first axis 201 as its endpoint and pointing backwards. In some embodiments, the included angle θ between the mounting direction 103 of the battery pack 200 and the first axis 201 of the motor 20 is greater than or equal to 75° and less than or equal to 90°. In one embodiment, the included angle θ can be 75°, 80°, or 90°. In some embodiments, the included angle θ between the mounting direction 103 of the battery pack 200 and the first axis 201 of the motor 20 is greater than or equal to 90° and less than or equal to 150°. In one embodiment, the included angle θ can be 95°, 120°, or 135°. In another alternative implementation, as shown in Figures 3 to 6, after the battery pack 200 is installed at the end of the second housing 12, the angle θ between its bottom plane γ and the first axis 201 of the motor 20 inside the second housing 12 is greater than or equal to 75° and less than or equal to 150°. In some embodiments, the angle θ between the bottom plane γ of the battery pack 200 and the first axis 201 of the motor 20 is greater than or equal to 75° and less than or equal to 90°. In one embodiment, the angle θ can be 75°, 85°, or 90°. In some embodiments, the angle θ between the bottom plane γ of the battery pack 200 and the first axis 201 of the motor 20 is greater than or equal to 90° and less than or equal to 150°. In one embodiment, the angle θ can be 100°, 115°, or 140°.

[0055] With the cooperation of the aforementioned components such as the motor 20, transmission assembly 30, and energy storage system 300, the driving force of the motor 20 can be ultimately transmitted to the striking assembly 40, which in turn drives the striking assembly 40 to perform a striking action on the fasteners 400, such as nails, provided by the magazine assembly 50. The striking assembly 40 is housed within the first receiving space of the first housing 11 and may include a striking member 41 capable of striking the fasteners 400 and causing them to enter the workpiece. When the energy stored in the energy storage system 300 is released, it drives the striking member 41 to move rapidly along the striking direction 401, thereby driving the nails, etc., located ahead of the moving path into the workpiece. Commonly, the striking member 41 may be in the shape of a firing pin. In some embodiments, the extension direction of the striking member 41 is the same as the striking direction 401 and may be consistent with the extension direction 101 of the first housing 11, for example, along the vertical direction. In order for the driving force of the motor 20 to be ultimately transmitted to the striking member 41, the striking member 41 may also have a meshing structure such as a rack and pinion.

[0056] In some embodiments, as shown in Figures 2 to 6, the striking direction 401 of the striking member 41 and the first axis 201 of the motor 20 inside the second housing 12 can form a first plane α, and the bottom plane γ of the battery pack 200 of the fastener driver 100 after installation can be perpendicular to the first plane α. In some embodiments, as shown in Figures 5 and 6, the mounting direction 103 of the battery pack 200 of the fastener driver 100 can also be perpendicular to the first plane α, for example, the battery pack 200 can be inserted and removed in the left-right direction. It is understood that this does not mean that the centerline of the striking member 41 is coplanar with the first axis 201. The first plane α can be specifically defined as a plane that is perpendicular to both the plane perpendicular to the striking direction 401 or the centerline of the striking member 41 and the plane perpendicular to the first axis 201 of the motor 20. In some embodiments, the first plane α can also be formed by either the striking direction 401 of the striking member 41 or the extending direction 101 of the first housing 11, and either the first axis 201 of the motor 20 or the extending direction 102 of the second housing 12.

[0057] The magazine assembly 50 is capable of storing fasteners 400, such as nails, with multiple fasteners 400 arranged in parallel and housed within the magazine assembly 50. The magazine assembly 50 is detachably connected to the housing assembly 10 and can be removed from the housing assembly 10 for replacement of the fasteners 400 or for maintenance of the magazine assembly 50. The magazine assembly 50 may be located on the opposite side of the housing assembly 10 from the second housing 12. In some embodiments, the magazine assembly 50 may be disposed below the fastener driver 100 in a manner substantially parallel to the extension direction 102 of the second housing 12, or substantially perpendicular to the extension direction 101 of the first housing 11. In other embodiments, the magazine assembly 50 may also form an acute angle with the extension direction 101 of the first housing 11, or the magazine assembly 50 may be disposed below the fastener driver 100 in a manner not parallel to the extension direction 102 of the second housing 12. In some embodiments, the magazine assembly 50 housing is further provided with one or more windows 51 for the operator to observe the number of remaining nails, which can be achieved through a notch in the housing.

[0058] In some embodiments, as shown in FIG7, the projection of the magazine assembly 50 and the projection of the battery pack 200 are at least partially overlapped in the second plane β perpendicular to the striking direction 401 of the striking member 41, so as to improve the overall balance of the device's center of gravity. In some embodiments, the overlapping portion includes at least the joint portion where the battery pack 200 is mounted to the end of the second housing 12. In some embodiments, the second plane β may also be a plane perpendicular to the extending direction 101 of the first housing 11, or the projections of the magazine assembly 50 and the battery pack 200 in the vertical direction may at least partially overlap. It should be noted that the fastener driver 100 shown in FIG5 to FIG7 can optimize the overall center of gravity while avoiding interference with the operator's grip after the battery pack 200 is installed, such as the mounting buckle structure of the battery pack 200 potentially causing discomfort to the hand.

[0059] The energy storage system 300 of the fastener driver 100, in some embodiments, taking a cylinder 311 type nail gun as an example, may include a cylinder 311, a striking element 41 partially housed within the cylinder 311, and a piston 312 disposed at the top of the cylinder 311 and fixing the striking element 41. The cylinder 311 is housed within a first receiving space of the first housing 11 and may be located at the upper part of the first receiving space. The extending direction of the cylinder 311 may be consistent with the first housing 11, for example, extending in a vertical direction. The piston 312 is built into the cylinder 311, and the gas in the cylinder 311 can be compressed or released by the movement of the piston 312 along the extending direction of the cylinder 311. The striking element 41 may be substantially mounted at the center point of the piston 312 and partially located within the cylinder 311. The extending direction and striking direction 401 of the striking element 41 may also be consistent with the extending direction 101 of the first housing 11, thereby linking the movement of the striking element 41 with the movement of the piston 312 and the change in air pressure within the cylinder 311. When the energy storage system 300 stores energy, the driving force of the motor 20 is transmitted to the striking member 41, causing it to move in the opposite direction of the striking direction 401. This causes the piston 312 connected to it to compress the gas in the cylinder 311, increasing the gas pressure in the cylinder 311 and thus storing energy for the energy storage system 300. When the striking member 41 performs a striking action, the energy stored in the energy storage system 300 is released, the compressed gas in the cylinder 311 releases pressure, the gas pressure decreases, the volume increases, pushing the piston 312 and the connected striking member 41 to move in the striking direction 401, thereby performing a striking action on the fastener 400 located on the side of the striking member 41 away from the piston 312. In some embodiments, the fastener driver 100 may have two cylinders 311: an inner cylinder 311 and an outer cylinder 311. Both the inner and outer cylinders 311 can extend in the same direction as the first housing 11. The inner cylinder 311 may be offset at one end of the outer cylinder 311, and the outer cylinder 311 may be sleeved on part of the inner cylinder 311. The centerlines of the inner and outer cylinders 311 can be parallel but not collinear. The piston 312 can be internally housed within the inner cylinder 311. The outer cylinder 311 can have a pre-charge nozzle for pre-filling gas.

[0060] In other embodiments, as shown in FIG9, taking a spring-loaded nail gun as an example, the energy storage system 300 may also include a spring 320 and a striking member 41 connected to the spring 320. Similar to the previous description, the extension direction of the spring 320, the extension direction of the striking member 41, and the striking direction 401 may all be consistent with the extension direction 101 of the first housing 11, for example, along the vertical direction. When the energy storage system 300 stores energy, the driving force from the motor 20 causes the striking member 41 to move in the opposite direction of the striking direction 401, thereby compressing the spring 320 connected to it to achieve energy storage for the energy storage system 300. When the striking member 41 performs a striking action, the energy stored in the energy storage system 300 is released, and the compressed spring 320 releases pressure. The spring 320 extends and pushes the striking member 41 connected to it to move along the striking direction 401, thereby performing a striking action on the fastener 400 located on the side of the striking member 41 away from the spring 320.

[0061] The following describes an alternative implementation method, in order to accommodate the positional arrangement of components such as the motor 20, the second housing 12, the magazine assembly 50, and the first housing 11 in this application, further comprising and arranging the power transmission of the fastener driver 100 in addition to the aforementioned motor 20 and gearbox 31 transmission assembly 30. In some embodiments, the fastener driver 100 further includes a drive mechanism 70. The driving force from the motor 20 is transmitted to the drive mechanism 70, which can cause the drive mechanism 70 to rotate about the second axis 701 to drive the striking member 41 to move in the opposite direction of its striking direction 401, thereby enabling the energy storage system 300 to store energy. Continuing from the foregoing, in some embodiments, as shown in FIG4, the striking member 41, which is shaped like a firing pin, has a meshing structure such as a rack and pinion, which the drive mechanism 70 can mesh with to transmit the driving force from the motor 20 to it. For example, the aforementioned drive mechanism 70 may include a drive wheel 71 that meshes with the striking member 41. The transmission teeth arranged on the striking member 41 along the striking direction 401 can engage with the drive teeth arranged on the circumferential side of the drive wheel 71 to convert the rotational motion of the drive wheel 71 into the translational motion of the striking member 41. In some embodiments, the rotation axis of the drive mechanism 70, i.e., the second axis 701, may be the centerline of the drive wheel 71, which may be substantially parallel to the first axis 201 of the motor 20 or substantially parallel to the second direction 102 where the second housing 12 is located. In some embodiments, the distance D2 between the second axis 701 and the first axis 201 is greater than or equal to 40 mm and less than or equal to 80 mm. In some embodiments, the second axis 701 of the drive mechanism 70 may also be substantially perpendicular to the striking / extending direction 401 of the striking member 41 or substantially perpendicular to the first direction 101 where the first housing 11 is located. Exemplarily, the outer periphery of the drive wheel 71 may be divided into a first section and a second section. The first section has a plurality of drive teeth evenly distributed, while the second section is smooth and continuous. During one nailing cycle, the drive wheel 71 rotates continuously around the second axis 701. When the drive tooth in the first section meshes with the transmission tooth of the striking member 41, the striking member 41 is driven to move in the opposite direction to store energy in the energy storage system 300. Upon reaching the second section, there is no drive tooth to stop the transmission tooth, and the energy storage system 300 releases energy. The cylinder 311 or spring 320 drives the striking member 41 to strike the fastener 400 in the forward direction to achieve the nailing action.

[0062] Furthermore, in some embodiments, to accommodate the positional arrangement of the motor 20, second housing 12, magazine assembly 50, first housing 11, etc., in this application, the fastener driver 100 also includes a transmission mechanism 60. This mechanism transmits the power output from the transmission assembly 30 to the aforementioned drive mechanism 70. In other words, the driving force from the motor 20 passes through the transmission assembly 30, the transmission mechanism 60, and the drive mechanism 70 before reaching the striking member 41 to store energy in the energy storage system 300. Considering that the motor 20 is housed within the second housing 12, which serves as the grip, and that the striking member 41 requires a certain space for translational energy storage, there is a certain distance between the first axis 201 of the motor 20 and the second axis 701 of the drive mechanism 70. The transmission mechanism 60 is responsible for transmitting power over this distance and may include one or more of chain drive, belt drive, and gear drive. In some embodiments, the transmission mechanism 60 uses a belt drive 61 to transmit the power output from the transmission assembly 30 to the drive mechanism 70. In some embodiments, the speed ratio of the transmission mechanism 60 may be greater than or equal to 1 and less than or equal to 1.5. In some embodiments, the reduction ratio of the transmission mechanism 60 can be greater than or equal to 0.5 and less than or equal to 1. Of course, the possibility of the transmission assembly 30 directly transmitting power to the drive mechanism 70 without the transmission mechanism 60 cannot be completely ruled out.

[0063] In some embodiments, as shown in FIG8, the projection of the transmission mechanism 60 falls within the projection range of the energy storage system 300 in a third plane Σ perpendicular to the first axis 201 of the motor 20, including but not limited to overlapping with the projections of one or more of the cylinder 311, piston 312, spring 320, and striking member 41 of the energy storage system 300. It should be noted that FIG8 shows a bottom view from the motor 20 towards the transmission mechanism 60 and the drive mechanism 70. In some embodiments, the transmission mechanism 60 may be housed within a first receiving space of the first housing 11. For example, it may be located in the remaining space of the first receiving space near the second housing 12 and the motor 20 of the cylinder 311 / spring 320 and the striking member 41. In some embodiments, the transmission mechanism 60 may also be partially housed in the first receiving space and partially housed in the second receiving space. In some embodiments, the third plane Σ may also be a plane perpendicular to the extending direction 102 of the second housing 12, or the projection of the transmission mechanism 60 in the front-rear direction may fall within the projection of the energy storage system 300.

[0064] The heat dissipation scheme of the fastener driver 100 is described below. As shown in Figures 2 to 6, in one alternative embodiment, a fan 21 is provided at the end of the motor 20 housed in the second receiving space of the second housing 12 away from the transmission assembly 30. The fan 21 can be formed or connected to the shaft of the motor 20 to operate with the motor 20. The housing assembly 10 is provided with an air inlet 131 and an air outlet 132. The air inlet 131 can be provided on the second housing 12 in front of the transmission assembly 30, for example, it can be located approximately at the junction of the second housing 12 and the first housing 11. The air outlet 132 can be provided on the second housing 12 corresponding to the position of the fan 21, for example, it can be at least partially provided on the second housing 12 behind the fan 21, or at least partially provided on the second housing 12 around the fan 21. In some embodiments, the fan 21 can be a centrifugal fan. Alternatively, in other embodiments, the fan 21 may also be an axial fan. During the operation of fan 21, the cooling airflow enters the housing assembly 10 from the air inlet 131, flows from front to back through the motor 20 at least within the second housing 12 to dissipate heat, and then flows out from the air outlet 132. In some embodiments, the cooling airflow can form a wind path inside the housing assembly 10 that is opposite to the power transmission path, and the cooling airflow can pass through the transmission assembly 30, the motor 20, etc., in sequence to perform heat dissipation.

[0065] In some embodiments, the fastener driver 100 further includes a switch 14 operated by an operator to start the motor 20. Exemplarily, the switch 14 may be provided in the form of a trigger on the housing assembly 10. For example, it may be located at the junction of the second housing 12 or the first housing 11. The switch 14 has a lower operating surface in the vertical direction. This lower operating surface, which is the main force-bearing surface for the operator to operate the switch 14 during tool use, has an upper endpoint P, which is its uppermost point in the vertical direction. The distance D1 between the air outlet 132 located on the second housing 12 near the fan 21 and the upper endpoint P of the lower operating surface in the direction of the first axis 201 of the motor 20 is greater than or equal to 85 mm and less than or equal to 120 mm, or the distance D1 between the air outlet 132 and the upper endpoint P in the front-rear direction is greater than or equal to 85 mm and less than or equal to 120 mm, such that the air outlet 132 and the switch 14 are located on opposite sides of the second housing 12. In some embodiments, the distance D1 between the air outlet 132 and the upper end point P along the first axis 201 or in the front-back direction is greater than or equal to 90 mm and less than or equal to 110 mm. The design of the air inlet and outlet positions can prevent the heat dissipation airflow from blowing towards the operator's hand holding the grip, thus improving the user experience under the relevant layout.

[0066] In some embodiments, since the motor 20 is disposed within the second housing 12, which serves as the gripping portion of the fastener driver 100, a heat insulation member 22 is provided between the motor 20 and the second housing 12 to maintain a good gripping feel. Exemplarily, the heat insulation member 22 is disposed around the motor 20, and its material thermal conductivity is at least different from that of the material of the second housing 12 around the motor 20. In some embodiments, the thermal conductivity of the heat insulation member 22 is also different from that of the stator of the motor 20. The thermal conductivity of the heat insulation member 22 can be greater than or equal to the thermal conductivity of the second housing 12 and / or the stator of the motor 20, or it can be less than or equal to the thermal conductivity of the second housing 12 and / or the stator of the motor 20.

[0067] The technical effects of this application include at least optimizing the overall balance of the fastener driver's center of gravity and improving operator efficiency and user experience. It is understood that the different implementation methods or embodiments described above can be combined with each other to comprehensively optimize the fastener driver in this application, which does not exceed the scope of protection of this application.

[0068] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this application.

Claims

1. A fastener driver (100), comprising: The striking component (40) includes a striking element (41) configured to strike the fastener (400). The housing assembly (10) includes at least a first housing (11) housing the energy storage system (300) and a second housing (12) for the operator to hold. A battery pack (200) is mounted at the tail end of the second housing; The motor (20) is configured to rotate about a first axis (201) to generate driving force to drive the energy storage system to store energy; The transmission assembly (30) is configured to transmit the driving force of the motor; The motor and at least part of the transmission assembly are disposed in the second housing, and the angle θ between the mounting direction (103) of the battery pack and the first axis is greater than or equal to 75° and less than or equal to 150°.

2. The fastener driver according to claim 1, wherein, The striking direction (401) of the striking component forms a first plane α with the first axis, and the mounting direction of the battery pack is substantially perpendicular to the first plane.

3. The fastener driver according to claim 1, wherein, It also includes a magazine assembly (50) configured to accommodate a plurality of the fasteners; the magazine assembly at least partially overlaps with the projection of the battery pack in a second plane β perpendicular to the striking direction of the striking element.

4. The fastener driver according to claim 1, wherein, The outer diameter of the motor is less than or equal to 38mm.

5. The fastener driver according to claim 1, wherein, The output power of the motor is greater than or equal to 350W.

6. The fastener driver according to claim 1, wherein, The energy storage system includes a cylinder (311), a striking member partially housed within the cylinder, and a piston (312) disposed at the top of the cylinder and fixing the striking member.

7. The fastener driver according to claim 1, wherein, It also includes a drive mechanism (70) configured to be driven by the motor to rotate about a second axis (701) to drive the striking element to move in the opposite direction of the striking direction so that the energy storage system stores energy.

8. The fastener driver according to claim 7, wherein, The second axis is substantially parallel to the first axis, and the distance D2 between the second axis and the first axis is greater than or equal to 40 mm and less than or equal to 80 mm.

9. The fastener driver according to claim 7, wherein, It also includes a transmission mechanism (60) configured to transmit the power output by the transmission assembly to the drive mechanism; in a third plane Σ perpendicular to the first axis, the projection of the transmission mechanism falls within the projection range of the energy storage system.

10. The fastener driver according to claim 9, wherein, The transmission mechanism includes one or more of chain drive, belt drive, and gear drive.

11. The fastener driver according to claim 9, wherein, The reduction ratio of the transmission mechanism is greater than or equal to 0.5 and less than or equal to 1; or, the speed increase ratio of the transmission mechanism is greater than or equal to 1 and less than or equal to 1.

5.

12. The fastener driver according to claim 1, wherein, It also includes a fan (21), housed within the second housing and disposed at the rear end of the motor; and an air outlet (132), disposed in the second housing corresponding to the position of the fan. An air inlet (131) is disposed in front of the transmission assembly in the second housing; the fan is configured to rotate with the motor, driving the cooling airflow to flow in from the air inlet, and then flow through the motor along the second housing from front to back before flowing out from the air outlet.

13. The fastener driver according to claim 1, wherein, Also includes: A switch (14) is provided for the operator to operate in order to start the motor; The air outlet is located on the second housing behind the motor; The lower operating surface of the switch has an upper end point P in the vertical direction, and the distance D1 between the upper end point and the air outlet in the first axial direction is greater than or equal to 85 mm and less than or equal to 120 mm.

14. The fastener driver according to claim 1, wherein, A heat insulation component (22) is provided around the motor, and the thermal conductivity of the material of the heat insulation component is at least different from the thermal conductivity of the second housing around the motor.

15. The fastener driver according to claim 14, wherein, The thermal conductivity of the insulation material is different from that of the stator material of the motor.

16. A fastener driver (100), comprising: The striking component (40) includes a striking element (41) configured to strike the fastener (400). The housing assembly (10) includes at least a first housing (11) housing the energy storage system (300) and a second housing (12) for the operator to hold. A battery pack (200) is mounted at the tail end of the second housing; The motor (20) is configured to rotate about a first axis (201) to generate driving force to drive the energy storage system to store energy; The transmission assembly (30) is configured to transmit the driving force of the motor; The motor and at least part of the transmission assembly are disposed within the second housing, and the angle θ between the bottom plane γ of the battery pack and the first axis is greater than or equal to 75° and less than or equal to 150°.

17. The fastener driver according to claim 16, wherein, The striking direction (401) of the striking component forms a first plane α with the first axis, and the bottom plane of the battery pack is substantially perpendicular to the first plane.

18. A fastener driver (100), comprising: The striking component (40) includes a striking element (41) configured to strike the fastener (400). A magazine assembly (50) is configured to accommodate a plurality of the fasteners; The housing assembly (10) includes at least a first housing (11) for housing the energy storage system (300) and a second housing (12) for the operator to hold. A battery pack (200) is mounted at the tail end of the second housing; The motor (20) is configured to rotate about a first axis (201) to generate driving force to drive the energy storage system to store energy; The transmission assembly (30) is configured to transmit the driving force of the motor; The motor and at least part of the transmission assembly are disposed within the second housing; the striking direction (401) of the striking member forms a first plane α with the first axis, and the mounting direction (103) of the battery pack is substantially perpendicular to the first plane; in a second plane β perpendicular to the striking direction, the projection of the battery pack and the magazine assembly at least partially coincide.

19. The fastener driver according to claim 18, wherein, It also includes a drive mechanism (70) configured to be driven by the motor to rotate about a second axis (701) to drive the striking element to move in the opposite direction of the striking direction so that the energy storage system stores energy.

20. The fastener driver according to claim 19, wherein, The second axis is substantially parallel to the first axis, and the distance D2 between the second axis and the first axis is greater than or equal to 40 mm and less than or equal to 80 mm.

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