Powered fastener driver

Abstract

A powered fastener driver includes a driver blade movable from a top dead center (TDC) position toward a bottom dead center (BDC) position for driving a fastener into a workpiece; a nose through which the fastener is driven into the workpiece, the nose configured to guide the driver blade and the fastener into the workpiece; and a lift assembly for providing a torque to move the driver blade from the (BDC) position toward the TDC position. The lift assembly includes a rotary lift for engaging the driver blade to move the driver blade toward a (TDC) position. The rotary lifter includes: a body having a central bore; a flange extending radially from the body, the flange defining an outer radial profile configured to contact the driver blade to return the driver blade from the BDC position toward the TDC position; and a non-rotating mounting shaft coupled to the central bore to rotatably support the rotating lifter thereon.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to U.S. Provisional Patent Application No. 63 / 766,050, filed March 3, 2025; U.S. Provisional Patent Application No. 63 / 643,519, filed May 7, 2024; and U.S. Provisional Patent Application No. 63 / 564,556, filed March 13, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This utility model relates to a power fastener actuator, and more specifically to a fastener actuator powered by a gas spring. Background Technology

[0004] Various fastener actuators are known in the art for driving fasteners (e.g., nails, tacks, U-shaped nails, etc.) into a workpiece. These fastener actuators operate using various means known in the art (e.g., compressed air generated by an air compressor, electrical energy, flywheel mechanisms, etc.) to drive the actuator blades from the top dead center position toward the bottom dead center position to strike the fastener and drive the fastener into the workpiece. Utility Model Content

[0005] In one aspect, the present invention provides a power fastener driver comprising: a driver blade movable from a top dead center (TDC) position toward a bottom dead center (BDC) position for driving a fastener into a workpiece; a nose via which the fastener is driven into the workpiece, the nose being configured to guide the driver blade and the fastener as the driver blade drives the fastener into the workpiece; and a lifting assembly for providing torque to move the driver blade from the (BDC) position toward the TDC position. The lifting assembly includes a rotary lifter for engaging the driver blade to move the driver blade toward the (TDC) position. The rotary lifter includes: a body having a central bore; a flange extending radially from the body, the flange defining an outer radial profile configured to contact the driver blade to return the driver blade from the BDC position toward the TDC position; and a non-rotating mounting shaft coupled to the central bore to rotatably support the rotary lifter thereon.

[0006] In some embodiments, the power fastener driver further includes: a shaft extending through the nose and defining a pivot axis; and a latch pivotally supported on the shaft, the latch selectively holding the driver blade in an intermediate position between the lower dead center position and the upper dead center position or near the upper dead center position, overcoming bias forces.

[0007] In some embodiments, the latch pivots about the pivot axis between a locked position and a released position, in which the latch engages with the driver blade to hold the driver blade in the intermediate position, and in the released position, the latch pivots away from the driver blade to allow the driver blade to move.

[0008] In some embodiments, the power fastener driver further includes an actuator assembly for selectively releasing the latch from the driver blade in the intermediate position, the actuator assembly including an actuator member, a cam coupled to the rotary lifter to rotate with the rotary lifter, and a biasing member for biasing the actuator member to engage with the cam.

[0009] In some embodiments, when the cam engages the actuator component, the latch pivots about the pivot axis and disengages from the drive blade.

[0010] On the other hand, the present invention provides a power fastener driver, comprising: a driver blade movable from a top dead center (TDC) position toward a driven or bottom dead center (BDC) position for driving a fastener into a workpiece; a nose via which the fastener is driven into the workpiece, the nose being configured to guide the driver blade and the fastener as the driver blade drives the fastener into the workpiece; and a lifting assembly for providing torque to move the driver blade from the (BDC) position toward the TDC position. The lifting assembly includes a rotary lifter configured to selectively engage the driver blade to move the driver blade toward the (TDC) position. The rotary lifter includes: a body having a central bore and a flange extending radially from the body, the flange defining an outer radial profile configured to contact the driver blade to return the driver blade from the BDC position toward the TDC position. The flange includes a plurality of rollers arranged radially around the body to define the outer radial profile. The power fastener driver further includes a non-rotating mounting shaft coupled to the central bore to rotatably support the rotary lifter thereon. The shape of the last roller in a plurality of rollers is designed to be different from that of the rest of the plurality of rollers.

[0011] On the other hand, the present invention provides a power fastener driver, comprising: a driver blade movable from a top dead center (TDC) position toward a driven or bottom dead center (BDC) position for driving a fastener into a workpiece; a nose via which the fastener is driven into the workpiece, the nose being configured to guide the driver blade and the fastener as the driver blade drives the fastener into the workpiece; and a lifting assembly for providing torque to move the driver blade from the BDC position toward the TDC position. The lifting assembly includes a rotary lifter configured to selectively engage the driver blade to move the driver blade toward the TDC position. The rotary lifter includes a body and a plurality of protrusions extending from the body. The power fastener driver further includes a transmission device configured to provide torque to the rotary lifter. The transmission device is directly coupled to the body of the lifter via the plurality of protrusions.

[0012] In some embodiments, the transmission device further includes at least one planetary gear stage with a plurality of planetary gears, each planetary gear being supported on one of the plurality of protrusions.

[0013] In another aspect, the present invention provides a power fastener driver, comprising: a driver blade movable from a top dead center (TDC) position toward a driven or bottom dead center (BDC) position for driving a fastener into a workpiece; and a lifting assembly for providing torque to move the driver blade from the BDC position toward the TDC position. The lifting assembly includes a rotary lifter configured to selectively engage the driver blade to move the driver blade toward the TDC position. The rotary lifter includes: a cylindrical body rotatable about a rotation axis; a flange extending radially outward from the cylindrical body; a plurality of pins disposed around the periphery of the body, each of the plurality of pins extending from the opposite side of the flange; a plurality of rollers disposed on the respective pins and disposed on the opposite side of the flange; and a cantilevered support shaft extending along the rotation axis from the body. The cantilevered support shaft is coupled to rotate with the cylindrical body. The power fastener driver also includes a transmission device configured to provide torque via the cantilevered support axial rotary lifter.

[0014] In another aspect, the present invention provides a power fastener driver including a drive blade movable from a top dead center (TDC) position toward a driven or bottom dead center (BDC) position for driving a fastener into a workpiece. The drive blade includes a lowermost drive tooth having a flat portion. The power fastener driver also includes a drive unit and a rotary lifter engageable with the drive blade. The drive unit provides torque to move the drive blade from the BDC position toward the TDC position and includes a support shaft. The lifter is configured to receive torque from the drive unit in the rotational direction for returning the drive blade from the BDC position toward the TDC position. The lifter includes a plurality of lift pins, rollers, and a kickout arrangement defined between the rollers and the lowermost drive tooth. The rollers are rotatably supported on one of the lift pins for selectively engaging the flat portion of the lowermost drive tooth. The kickout arrangement is configured to allow limited movement of the lifter relative to the support shaft between a first position and a second position. When returning the drive blade from the BDC position toward the TDC position, the lifter is in the first position relative to the support shaft. The push-out arrangement allows the lifter to rotate from a first position to a second position relative to the support shaft in the opposite direction of rotation, so as to create a gap between the drive blade and the roller after the drive blade reaches the TDC position.

[0015] In some embodiments, the roller is a bearing roller that includes a non-circular outer peripheral surface.

[0016] In some embodiments, the non-circular outer peripheral surface includes a plurality of radial protrusions that define valleys therebetween, each valley forming an engagement section.

[0017] In another aspect, the present invention provides a power fastener driver, comprising: a driver blade movable from a top dead center (TDC) position toward a driven or bottom dead center (BDC) position for driving a fastener into a workpiece, the driver blade having a plurality of pins; a nose through which the fastener is driven into the workpiece, the nose being configured to guide the driver blade and the fastener as the driver blade drives the fastener into the workpiece; and a lifting assembly for providing torque to move the driver blade from the BDC position toward the TDC position. The lifting assembly includes a rotary lifter configured to selectively engage the driver blade to move the driver blade toward the TDC position. The rotary lifter includes a plurality of teeth arranged around the periphery of a body for sequentially contacting the pins on the driver blade to return the driver blade from the BDC position toward the TDC position.

[0018] In some embodiments, the power fastener driver further includes a transmission device for providing torque to the rotary lifter.

[0019] In some embodiments, the rotary lifter includes a plurality of protrusions extending from the body, and wherein the transmission includes at least one planetary gear stage with a plurality of planetary gears, each planetary gear supported on one of the plurality of protrusions.

[0020] Other features and aspects of this utility model will become apparent from careful reading of the following detailed description and accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a 3D view of a power fastener driver.

[0022] Figure 2 yes Figure 1 Another perspective view of the power fastener driver, in which parts of the housing are removed to show the drive assembly and lifting assembly of the power fastener driver.

[0023] Figure 3 It is along Figure 1 Section line 3-3 in the middle Figure 1 A partial cross-sectional view of the power fastener driver.

[0024] Figure 4 This is a three-dimensional view of a portion of the lifting assembly and drive blades.

[0025] Figure 5 yes Figure 4 A top view of the lifting components and drive blades.

[0026] Figure 6 yes Figure 4 Side view of the lifting components and drive blades.

[0027] Figure 7 It is along Figure 4 Section line 7-7 in the middle Figure 4 A partial cross-sectional view of the lifting component.

[0028] Figure 8 This is a partial perspective view of a lifting component according to another embodiment of the present invention.

[0029] Figure 9 This is a perspective view of a portion of the lifting assembly and the drive blade according to another embodiment of the present invention.

[0030] Figure 10 It is along Figure 9 Section line 10-10 in Figure 9 A partial cross-sectional view of the lifting component.

[0031] Figure 11This is a partial cross-sectional view of a lifting assembly according to another embodiment of the present invention.

[0032] Figure 12 This is a side view of a power fastener driver according to another embodiment of the present invention, wherein portions of the housing have been removed to show a portion of the lifting assembly and the driving assembly of the power fastener driver.

[0033] Figure 13 It is shown Figure 12 A schematic diagram of a portion of the enhancement component.

[0034] Figure 14 yes Figure 12 A perspective view of a portion of the rotary lifter and drive blades of a power fastener driver.

[0035] Figure 15 It is along Figure 14 Section line 15-15 cut Figure 14 A cross-sectional view of a portion of the rotary lifter and drive blades.

[0036] Figure 16 This is a cross-sectional view of a portion of a lifting assembly according to another embodiment of the present invention.

[0037] Figure 17 This is a cross-sectional view of a portion of a rotary lift according to another embodiment of the present invention.

[0038] Figure 18 This is a perspective view of a portion of a rotary lifter and a drive blade according to another embodiment of the present invention.

[0039] Figure 19 yes Figure 18 A three-dimensional view of the rotating lifter of the lifting component.

[0040] Figure 20 It is along Figure 18 Section line 20-20 in the middle Figure 18 A cross-sectional view of a portion of the rotary lift and the drive blades.

[0041] Figure 21 This is a perspective view of a portion of a rotary lift according to another embodiment of the present invention.

[0042] Figure 22 It is along Figure 21 Section line 22-22 in the middle Figure 21 A cross-sectional view of the rotary lift assembly.

[0043] Figure 23This is a perspective view of a portion of a rotary lift according to another embodiment of the present invention.

[0044] Figure 24 This is a plan view of a portion of a rotary lift according to another embodiment of the present invention.

[0045] Figure 25 This is a perspective view of a portion of a rotary lift according to another embodiment of the present invention.

[0046] Figure 26 It is along Figure 25 Section line 26-26 in the middle Figure 25 A cross-sectional view of a portion of the rotary lift.

[0047] Figure 27 This is a plan view of a rotary lift according to another embodiment of the present invention.

[0048] Figure 28 This is a perspective view of a rotary lift according to another embodiment of the present invention.

[0049] Figure 29 It is along Figure 28 Section line 29-29 in the middle Figure 29 A cross-sectional view of a rotary lifter, showing a portion of the drive blades.

[0050] Figure 30 This is a perspective view of a portion of the drive blades utilizing an integrated frame for supporting a rotary lifter according to another embodiment of the present invention.

[0051] Figure 31 yes Figure 30 A 3D diagram of the integrated framework, with some parts removed for clarity.

[0052] Figure 32 This is an enlarged perspective view of the flat portion on the teeth of a driver blade according to another embodiment of the present invention.

[0053] Figure 33 This is a cross-sectional view of a lifter assembly in a first rotational position relative to the drive blade, according to another embodiment of the present invention.

[0054] Figure 34A It is in the middle position. Figure 33 Another cross-sectional view of the lifter component.

[0055] Figure 34B yes Figure 34A An enlarged view showing the lifter assembly in its central position.

[0056] Figure 35 It is in the second rotational position relative to the drive blade. Figure 33 Another cross-sectional view of the lifter component.

[0057] Figure 36 yes Figure 35 An enlarged view showing the lift assembly in its second rotational position.

[0058] Figure 37 This is a perspective view of a portion of a rotary lifter and a drive blade according to another embodiment of the present invention.

[0059] Figure 38 yes Figure 37 A top view of the rotary lifter and drive blades.

[0060] Figure 39 This is an enlarged cross-sectional view of a transmission device according to another embodiment of the present invention.

[0061] Figure 40 yes Figure 39 A three-dimensional view of the transmission device.

[0062] Figure 41 This is a perspective view of a rotary lifter according to another embodiment of the present invention.

[0063] Figure 42 This is a cross-sectional view of a power fastener driver according to an embodiment of the present invention, wherein a portion of the housing has been removed to show the drive assembly of the power fastener driver.

[0064] Figure 43 This is a perspective view of a rotary lifter according to another embodiment of the present invention.

[0065] Figure 44 For clarity, some parts have been removed. Figure 43 A 3D view of a rotary lifter.

[0066] Figure 45 yes Figure 44 The rear view of the rotary lifter shows the latch assembly.

[0067] Before explaining any embodiment of the invention in detail, it should be understood that the application of the invention is not limited to the details of the construction and arrangement of the components described in the following description or shown in the drawings. The invention can have other embodiments and can be practiced or implemented in various ways. Furthermore, it should be understood that the wording and terminology used in this invention are for illustrative purposes and should not be considered restrictive. Detailed Implementation

[0068] Figures 1-3A fastener actuator 100 powered by a gas spring according to the present invention is shown. The fastener actuator 100 is operable to drive fasteners (e.g., nails, thumbtacks, U-bolts, etc.) held in a toolbox 104 into a workpiece (not shown). The fastener actuator 100 includes a housing 108, shown as two clamshell-type housings, supporting a drive assembly 112 operable to drive the fastener and a lifting assembly 116 operable to reset the drive assembly 112, allowing the fastener actuator 100 to drive another fastener. The drive assembly 112 includes an inner cylinder 120 and a movable piston 124 positioned within the inner cylinder 120. The piston 124 is available within the inner cylinder 120 in a ready or top dead center (TDC) position (not shown) and a driven or bottom dead center (BDC) position. Figure 3 The fastener actuator 100 moves between the drive assembly 112 and the lifting assembly 116. The actuator blade 128 is coupled to the piston 124 and is movable together with it along the drive axis A1. The fastener actuator 100 further includes a frame 132 disposed within the housing 108 to assist in supporting the drive assembly 112 and the lifting assembly 116. In some embodiments, the frame 132 may also support the inner cylinder 120 and the outer cylinder 140, as further detailed below. The fastener actuator 100 also includes a nose 136 coupled to the toolbox 104, and the nose 136 sequentially receives fasteners from the toolbox 104 to be driven into the workpiece. As the fasteners are driven into the workpiece by the actuator blade 128 of the drive assembly 112, the nose 136 guides each fastener. The fastener actuator 100 does not require an external pneumatic source to drive the fasteners, but instead includes a cylinder or outer cylinder 140 with a storage chamber of pressurized gas in fluid communication with the inner cylinder 120. In the illustrated embodiment, the outer cylinder 140 surrounds the inner cylinder 120, and the outer cylinder 140 and the inner cylinder 120 together form a compression chamber 142. In some embodiments, for example in... Figure 42 In this embodiment, the outer cylinder 140 is integrally formed with the frame 132. As the drive vane 128 and piston 124 move toward the ready position due to the lifting assembly 116, the air in the compression chamber (e.g., above the piston 124) is compressed, thereby increasing the amount of pressure acting on the piston 124. The lifting assembly 116 includes a motor 144 operatively coupled to a rotary lifter 148. The rotary lifter 148 can selectively engage with the drive vane 128, as will be discussed further in detail in this invention, to move the drive vane 128 and piston 124 toward the ready position. In the illustrated embodiment, a transmission 152 (such as a planetary transmission) is disposed between the motor 144 and the rotary lifter 148 to transmit rotational power or torque from the motor 144 to the rotary lifter 148.

[0069] In operation, the lifting assembly 116 provides torque generated by the electric motor 144 to the rotary lifter 148 via the transmission 152, causing the rotary lifter 148 to rotate. The rotation of the rotary lifter 148 moves the drive blade 128 from the driven position toward the ready position. The movement of the drive blade 128, and consequently the piston 124, moves to the ready position, compressing the gas contained within the compression chamber 142. Therefore, the lifting assembly 116 provides torque to the rotary lifter 148 to move the drive blade 128 to the ready position, thereby increasing the amount of pressure acting on the piston 124. To drive the fastener already supplied from the toolbox 104 to the nose 136, the drive blade 128 is released from the ready position and moves toward the driven position due to the gas pressure acting on the piston 124. The compression chamber 142 is a sealed environment and thus acts as a gas spring on the piston 124. As the drive blade 128 moves toward the BDC position, it contacts the fastener to drive it into the workpiece, and the fastener is guided into the workpiece by the nose 136. Further details regarding certain structures of the fastener driver 100 are given below.

[0070] Figures 4-7 Further details of a rotary lifter 148 and a drive blade 128 according to an embodiment of the present invention are shown. As previously described, the rotary lifter 148 selectively engages the drive blade 128 to move the drive blade 128 along a drive axis A1 from a driven position toward a ready position. To achieve selective engagement, the drive blade 128 includes a plurality of lifting teeth 156 extending laterally therefrom. The drive blade 128 has a length parallel to the drive axis A1, and the lifting teeth 156 extend laterally from the drive blade 128 to the drive axis A1. In the illustrated embodiment, the drive blade 128 further includes a slot 160 extending along its length parallel to the drive axis A1, and may receive a corresponding protrusion (not shown) of a nose member therein for alignment of the drive blade 128 and the drive axis A1. Each of the plurality of lifting teeth 156 includes a lifting surface 164 that engages with the rotary lifter 148. In the illustrated embodiment, the lifting surface 164 has a height H1 greater than the height H2 of the drive blade 128. In other embodiments, each lifting surface has a height equal to the height of the driver blade. As will be described in more detail in this invention, the height H1 of the lifting surface 164 facilitates engagement of the driver blade 128 with the rotary lifter 148. In the illustrated embodiment, a plurality of recesses 168 are provided between adjacent teeth of a plurality of lifting teeth 156 to provide a gap for engagement between the plurality of lifting teeth 156 and the rotary lifter 148.

[0071] See also Figures 4-7The rotary lifter 148 includes a body 172 and a support shaft 182 extending from the body 172 to be operatively coupled to the drive mechanism 152 and supporting the rotary lifter 148. In the illustrated embodiment, the support shaft 182 extends centrally from the body 172 and along the rotation axis A2 of the rotary lifter 148. In other words, the support shaft 182 is suspended from the body 172. A first bearing 186 is coupled to the support shaft 182 adjacent to the body 172, and a second bearing 190 is coupled to the support shaft 182 away from the body 172. The support shaft 182 is coupled to the drive mechanism adjacent to the second bearing 190. The first bearing 186 and the second bearing 190 may be further coupled to the housing 108 or frame 132 of the fastener driver 100 to secure the rotary lifter 148 relative to the housing 108 while allowing operation of the lifting assembly 116. In the illustrated embodiment, the support shaft 182 and the rotary lifter 148 are integrally formed. However, in other embodiments, the support shaft 182 may be coupled to the body 172 of the rotary lift 148.

[0072] See Figures 39-41 In some embodiments, the final stage 153 of the planetary transmission 152 may be integrated with the body 172 of the lifter 148. The final stage 153 may be coupled to the body 172 of the lifter 148 via a plurality of pins 155 extending from the final stage 153 of the planetary transmission 152 and coupled to the body 172 of the lifter 148. With this configuration, the final stage 153 of the planetary transmission 152 can directly rotatably drive the lifter 148, rather than rotatably driving a separate output shaft to rotatably drive the lifter 148. This arrangement eliminates the components and materials required to transmit torque between a conventional transmission and a rotating lifter via a smaller diameter shaft. In some embodiments, the body 172 of the lifter may include pins 194 (… Figure 40 The pitch circle diameter (PCD) D1 of the planetary gear 152 is consistent with the radial spacing of the pin 155 (46 mm), and the final stage 153 of the planetary gear 152 may have a pitch circle diameter (PCD) D2 consistent with the radial spacing of the pin 155 (30 mm). In such an arrangement, the ratio of D1 / D2 is approximately 1.53:1. In other embodiments, the ratio of D1 / D2 is less than 1.5:1 and approximately 1:1. In still other embodiments, the frame 132 includes one or more bearings 133 for rotatably supporting the body 172 of the lifter 148.

[0073] See also Figures 4-7 When viewed along the axis of rotation A2, the cross-section of the main body 172 of the rotary lift 148 is approximately circular. Figure 5In other words, the body 172 is cylindrical. The rotary lifter 148 also includes a flange 150 extending radially outward from the body 172. A plurality of pins 194 are disposed around the periphery of the body 172, and in the illustrated embodiment, each of the plurality of pins 194 extends from the opposite side of the flange 150. Each of the plurality of pins 194 extends parallel to the rotation axis A2 of the rotary lifter (e.g., has a length parallel to the rotation axis A2). See also Figure 5 The rotary lifter 148 shown includes "n" pins 194, where "n" is an integer. The plurality of pins 194 are spaced apart around the perimeter of the body 172, such that the distance D1 between the first pin 1941 and the second pin 1942 is approximately similar to the distance D2 between the second pin 1942 and the third pin 1943, and so on. However, the nth pin 194... n The distance D3 between the first pin 1941 and the first pin 194 is greater than the distance between the remaining pins 194. For example... Figures 4 to 7 As shown, the flange 150 may include a plurality of recesses 198 disposed between adjacent pins 194 to provide clearance for the lifting teeth 156 to engage the rotary lifter 148 without interfering with the body 172 of the rotary lifter 148. Furthermore, in the illustrated embodiment, the plurality of pins 194 are integrally formed with the flange 150 and the body 172 of the rotary lifter 148. Figure 7 ).

[0074] See still Figures 4-7 As described above, each of the plurality of pins 194 extends from opposite sides (i.e., above and below) of the flange 150. A plurality of rollers 202 are supported on the plurality of pins 194, such that each pin 194 includes rollers 202 located above and below the flange 150. Therefore, the rotary lifter 148 includes two rows of rollers 202 on opposite sides of the flange 150. The rollers 202 may be bearing assemblies, bushings, or other rolling elements. When the rotary lifter 148 engages with the drive blade 128, the rollers 202 are operable to contact the lifting surfaces 164 of the plurality of lifting teeth 156 to reduce friction and other load forces experienced between the rotary lifter 148 and the lifting teeth 156. In the illustrated embodiment, the nth pin 194... n This includes rollers that differ from the plurality of 202 rollers disposed on the remainder of pin 194. The nth pin 194 n Includes a socket roller 206 having a non-cylindrical outer peripheral surface. The socket roller 206 is defined by a wavy outer peripheral surface including a plurality of engagement sections 210. In other words, the socket roller 206 includes a plurality of radial protrusions 214, which define valleys therebetween, and the valleys form engagement sections 210. The engagement sections 210 are dimensioned to receive a portion therein of a lifting tooth (…). Figure 5 ).

[0075] See Figure 8 In some embodiments, the rotary lift 148 includes a stop 218 coupled to the body 172 and positioned to act on the bearing roller 206. In the illustrated embodiment, the stop 218 is a shaft 222 connected to the nth pin 194. n Aligned and biased to engage with bearing roller 206. Shaft 222 is biased toward engagement section 210 of bearing roller 206 to restrict rotation of bearing roller 206 about pin 194, thereby aligning another engagement section 210 of bearing roller 206 with lifting tooth 156. Alignment of engagement section 210 with lifting tooth 156 facilitates engagement of rotary lifter 148 with drive blade 128. Furthermore, stop 218 restricts rotation of bearing roller 206 when not engaged with lifting tooth 156 of drive blade 128. In the illustrated embodiment, stop 218 includes shaft 222 extending parallel to pin 194 of rotary lifter 148 and biased toward rotary lifter 148 by bias spring 226 to engage with both bearing rollers 206 (e.g., the nth pin 194). n The rotating lifter 148 engages with the bearing rollers 206 above and below its body 172. In other embodiments, the stop 218 may include two shafts, such that each shaft is biased to engage with one of the bearing rollers 206. In other embodiments, the stop 218 may be formed as a pair of ball stops biased to engage with the bearing roller 206, or it may be formed as leaf springs or leaf springs shaped to engage the engagement section 210 of the bearing roller 206.

[0076] Although Figures 4-7 In this embodiment, a plurality of pins 194 are integrally formed with the flange 150 and the body 172 of the rotary lifter, but Figures 9-11 An embodiment of the rotary lifter 1148 is shown, wherein identical components are given the same reference numerals plus "1000", and the following differences are explained below. Unlike the rotary lifter 1148, the pin 1194 is formed separately from and coupled to the flange 1150 of the rotary lifter 1148. The flange 1150 may include a plurality of holes 230, and a plurality of pins 1194 may be disposed within the plurality of holes 230. Figure 9 and Figure 10 In the implementation method, the nth pin 1194 n The device includes an integrally formed retaining roller 1206, which forms the head of the pin 194. A second retaining roller 1206 is coupled to the pin 1194 on the opposite side of the main body 1172 of the rotary elevator 1148 from the integrally formed retaining roller 1206. n To sell 1194 n It is fixed within the hole 230 of the main body 1172. Figure 11 In the implementation method, the nth pin 1194 n It is formed independently of the two bearing rollers 1206.

[0077] In operation, the rotary lifter 148 is supported within the fastener driver 100 by a cantilevered support shaft 182. A first bearing 186 and a second bearing 190 couple the rotary lifter 148 to the housing 108, and the support shaft 182 is fixed to the drive unit 152 to receive torque from the drive unit 152. An electric motor 144 provides torque to the drive unit 152, which in turn provides torque to the rotary lifter 148 via the support shaft 182. The torque supplied to the rotary lifter 148 causes rotation of the body 172 of the rotary lifter 148, causing the rotary lifter 148 to sequentially engage the lifting teeth 156 of the driver blade 128 to move the driver blade 128 toward the TDC position. In the illustrated embodiment, a plurality of rollers 202 engage the lifting surfaces 164 of a plurality of lifting teeth 156, and the retaining roller 206 engages the last of the lifting teeth 156. In some embodiments, the rotary lifter may not include rollers, and a plurality of pins of the rotary lifter may engage the lifting surfaces of the lifting teeth. The rotary lifter 148 of the illustrated embodiment includes rollers 202 disposed on either side of the flange 150, and each roller 202 engages with a lifting surface 164. Therefore, the force acting on the rotary lifter 148 from each lifting tooth 156 of the driver blade 128 is shared between the sides of the body 172 of the rotary lifter 148. As previously described, the height H1 of each lifting surface 164 is greater than the height H2 of the driver blade 128. The height H1 of the lifting surface 164 allows the lifting surface 164 to engage simultaneously with the rollers 202 above and below the flange 150 of the rotary lifter 148 to distribute or share the force acting on the rotary lifter 148, and more specifically, the force acting on the double rollers 202 in each row of pins 194.

[0078] Figures 12-17 Another embodiment of the fastener driver 2100 according to the present invention is shown, wherein the same parts are given the same reference numerals plus "2000", and the following differences are explained below. The rotary lifter 2148 is supported by the frame 2132 of the power fastener driver 2100 and does not include a support shaft, whereas the rotary lifter 148 includes an integrated cantilever support shaft 182 to support the rotary lifter 148 and receive torque from the transmission 152. In the illustrated embodiment, the rotary lifter 2148 is supported by a nose piece 2136 ( Figure 14The nose member 2136 includes a non-rotatable mounting shaft 234 extending from the nose member 2136, and the rotary lifter 2148 includes a central bore 238 extending through the body 2172. In other embodiments, the non-rotatable mounting shaft 234 may be coupled to and extend from the frame 2132, with the inner cylinder 2120 and outer cylinder 2140 supported on the frame 2132 instead of the nose member 2136. Furthermore, in other embodiments, the rotary lifter 2148 may include a centrally located blind bore instead of the central bore 238. The mounting shaft 234 extends into the central bore 238 and is coupled to the body 2172 of the rotary lifter 2148 via a bearing assembly 242. The body 2172 of the rotary lifter 2148 is then directly coupled to the drivetrain 2152 to receive torque from the drivetrain 2152. See also Figure 13 The schematic diagram shows that the body 2172 can be splined to the transmission 2152 (and more specifically, to the final planetary carrier) to receive only the torque load from the transmission 2152. The bearing assembly 242 rotatably couples the body 2172 to the frame 2132 of the fastener driver 2100 to support the rotary lifter 2148. The bearing assembly 242 in the illustrated embodiment is a needle roller bearing assembly (…). Figure 16 ).exist Figure 15 In one embodiment, the needle roller bearing assembly 242 is the first bearing assembly, and the ball bearing assembly 246 is also disposed between the mounting shaft 234 and the body 2172 of the rotary lifter 2148. Furthermore, in some embodiments, the bearing assembly 242 may include a pair of ball bearing assemblies (…). Figure 17 Similar to a rotary lift including a cantilevered support shaft, rotary lift 2148 includes a plurality of pins 2194 supporting a plurality of rollers 2202, which sequentially engage with lifting teeth 2156 of a drive blade 2128. In the illustrated embodiment, body 2172 includes a radially extending flange 250 having opposite sides from which the plurality of pins 2194 extend, wherein two rows of rollers 2202 are disposed on opposite sides of flange 250.

[0079] In some embodiments, the radially extending flange 250 defines an outer radial profile defined by each of the plurality of pins 2194 and the plurality of rollers 2202.

[0080] Figures 18-20Another embodiment of the rotary lifter 3148 according to the present invention is shown, wherein the same parts are given the same reference numerals plus "3000", and the following differences are explained below. Similar to the rotary lifter 2148 described above, the rotary lifter 3148 includes a central bore 3238 in which a bearing assembly 3242 is disposed to couple the rotary lifter 3148 to a fastener driver 3100. Unlike the rotary lifter 2148, the rotary lifter 3148 includes a plurality of pins 3194 suspended from a radially extending flange 3250 of a body 3172. In other words, the flange 3250 extends from the cylindrical body 3172 of the rotary lifter 3148, and the plurality of pins 3194 extend only from one side of the flange 3250. In some embodiments, the rotary lifter 3148 may include a plurality of pins 3194 extending above and below the radially extending flange 3250. Each of the plurality of pins 3194 still supports a plurality of rollers 3202 that can engage with the drive blade 3128. However, the nth pin 3194 n The bearing roller is not supported. Instead, the nth pin 3194 n Support alignment ring 254. Alignment ring 254 includes pin 3194 extending from alignment ring 254. n An arm 258 extends to engage the lifting tooth 3156. Arm 258 includes a recess forming an engagement section 3210. Therefore, the alignment ring 254 and arm 258 are similar to the aforementioned bearing roller, but have only a single engagement section 3210. In some embodiments, the nth pin 3194 n Instead of the alignment ring 254, a bearing roller may be disposed thereon. The alignment ring 254 may further include a biasing spring (shown as a torsion spring 3218) to rotate the alignment ring 254 toward a position where the engagement section 3210 aligns with a portion of the lifting tooth 3156. Furthermore, the rotary lift 3148 includes a plurality of protrusions 262 extending from the body 3172 to couple the rotary lift to the drive mechanism 3152, rather than using a spline connection.

[0081] Figures 21-23 Another embodiment of the rotary lifter 4148 according to the present invention is shown, wherein the same components are given the same reference numerals plus "4000", and the following differences are explained below. The rotary lifter 4148 includes a body 4172 and a flange 4150 extending radially outward from the body 4172. A plurality of pins 4194 are disposed around the periphery of the body 4172. However, compared with Figures 4-7 The implementation differs, with pin 4194 suspended from one side of flange 4150. A plurality of rollers 4202 are supported on corresponding pins 4194, and the nth pin 4194... nThe rotary lifter 4148 includes a bearing roller 4206. The rotary lifter 4148 further includes a load plate 266 coupled to pins 4194. The load plate 266 includes a central bore 270 through which the body 4172 of the rotary lifter 4148 extends, and a plurality of pin holes 274 spaced around the load plate 266 to receive corresponding pins 4194 therein. The load plate 266 distributes mechanical load forces among the pins 4194 during lifting operations. Figure 23 In one embodiment, load plates 266 are formed as a plurality of load plates 266 coupled to adjacent pins 4194. Although pins 4194 are illustrated as being integrally formed with flanges 4150 of rotary lifters 4148, in other embodiments, pins 4194 may be detached from rotary lifters 4148 and coupled to flanges 4150.

[0082] Figure 24 Another embodiment of the rotary lift 5148 according to the present invention is shown, wherein the same parts are given the same reference numerals plus "5000", and the following differences are explained below. Unlike the rotary lift 4148, the rotary lift 5148 does not include a load plate. However, the rotary lift 5148 includes a radial arm 278 extending from the body 5172 of the rotary lift 5148. The radial arm 278 connects the nth pin 5194 n Coupled to the body 5172, and in the illustrated embodiment, the radial arm 278 and pin 5194 n It is integrally formed with the main body 5172. The radial arm 278 originates from the nth pin 5194 opposite to the flange 5150. n Extended, and the bearing roller 5206 is coupled between the flange 5150 and the radial arm 278 to the nth pin 5194. n Furthermore, in Figure 24 In this embodiment, the retaining roller 5206 is C-shaped and includes only a single engagement segment 5210. The retaining roller 5206 can rotate around the nth pin 5194. n Rotation causes the engagement section 5210 to mesh with the lifting teeth 5156 of the driver blade 5128. In operation, the radial arm 278 acts similarly to a load plate in the previous embodiment, distributing the mechanical load force borne by the nth pin to the driver blade 5128 as the lifter 5148 rotates. However, the radial arm 278 only engages the nth pin 5194. n The mechanical load force is distributed to the main body 5172, rather than distributed among the remaining pins.

[0083] Figure 25 and Figure 26Another embodiment of the rotary lifter 6148 according to the present invention is shown, wherein the same parts have the same reference numerals plus "6000", and the following differences are explained below. The radial arm 6278 is not connected to the body 6172 and the nth pin 6194. n It is formed as a whole, but rather from the main body 6172 toward the nth pin 6194. n Extended but not with the nth pin 6194 n They are formed as a single unit. Conversely, the bearing roller 6206 is formed to surround the nth pin 6194. n The cap, and the radial arm 6278 includes an arcuate recess 290, in which a portion of the retaining roller 6206 is received. More specifically, the retaining roller 6206 includes a plurality of engaging sections 6210 and a cylindrical cap 294. The cylindrical cap 294 is disposed within the arcuate recess 290 and abuts the radial arm 6278 to support the retaining roller 6206 and thus support the nth pin 6194. n Thus, as the drive blade 6128 returns toward the TDC position, the radial arm 6278 absorbs the force applied to the pin 6194 by the engaged lifting tooth 6156 (via the bearing roller 6206). n The bending load. Therefore, the radial arm 6278 distributes the mechanical load force from the nth pin to the body of the rotary elevator 6148 via the bearing roller 6206.

[0084] Figure 27 Another embodiment of the rotary lifter 7148 according to the present invention is shown, wherein the same parts are given the same reference numerals plus "7000", and the following differences are explained below. Similar to the rotary lifter 6148 described above, the rotary lifter 7148 includes a radial arm 7278 that abuts the cylindrical cap 7294 of the bearing roller 7206 to distribute the nth pin 7194. n The mechanical load force is subjected to. However, unlike the rotary lift 6148 described above, the rotary lift 7148 includes a plurality of radially extending arms 7278. Each radially extending arm 7278 abuts a pin 7194 to support the pin 7194 and distribute the mechanical load force.

[0085] Figure 28 and Figure 29Another embodiment of the rotary lifter 8148 according to the present invention is shown, wherein the same components are given the same reference numerals plus the number "8000", and the following differences are explained below. The rotary lifter 8148 includes a plurality of lugs 282 integrally formed with the body 8172, instead of including a plurality of pins as in the rotary lifter described above. The lugs 282 define recesses 286 therebetween to provide clearance for the lifting teeth 8156 of the drive blade 8128. As the drive blade 8128 moves toward the top dead center position, each lug 282 engages with the lifting teeth 8156. However, the rotary lifter 8148 does include a pin 8194 corresponding to the nth pin in the previous embodiment. n Sales: 8194 n A support roller 8206, similar to a support roller 6206, is provided. Therefore, the support roller 8206 includes a plurality of engaging sections 8210 and a cylindrical cap 8294. The support roller 8206 is positioned on a pin 8194. n Upper and lower pins 8194 n Bearing roller 8206 can be wound with pin 8194. n The rotating radial extension arm 8278 extends from the body 8172 of the rotary elevator 8148 to support the bearing roller 8206 and thus support the pin 8194. n The radially extending arm 8278 includes an arcuate recess 8290 adjacent to the cylindrical cap 8294. Therefore, as the drive blade 8128 returns toward the TDC position, the radially extending arm 8278 absorbs the force applied to the pin 8194 by the engaged lifting tooth 8156 (via the bearing roller 8206). n Bending load.

[0086] Figures 30-31 Another embodiment of the fastener actuator 9100 according to the present invention is shown, wherein the same components are given the same reference numerals plus "9000", and the following differences are explained below. The rotary lifter 9148 is supported by an integrated frame 9132 of the power fastener actuator 9100 and includes a non-integrated support shaft 9182, whereas the rotary lifter 148 includes an integrated cantilevered support shaft 182 for supporting the rotary lifter 148 and receiving torque from the transmission 152. The integrated frame 9132 combines the frame 9132 and the nose piece 9136 into a single component. The rotary lifter 9148 is rotatably driven by the support shaft 9182, which receives torque from the transmission 152 coupled to the motor 144. The integrated frame 9132 includes an upper flange 9134 and a nose 9136. An inner cylinder 9120 and an outer cylinder 9140 (e.g., using fasteners) are coupled to the upper flange 9134. The nose 9136 is used to guide each fastener as it is driven into the workpiece by the driver blade 9128. Figure 31 ).

[0087] See also Figure 30 and Figure 31 The integrated frame 9132 further includes a support arm 9137 that partially receives the support shaft 9182 via a bore 9139. In some embodiments, the bore 9139 includes a needle roller bearing (e.g., bearing assembly 242) to rotatably support the rotary lifter 9148 on the integrated frame 9132. On the opposite side of the support arm 9137, the integrated frame 9132 includes a transmission support 9141 for supporting a portion of the transmission 152.

[0088] Figures 32-36 This invention illustrates a device for use with a rotary lifter 148 ( ). Figure 33 Another embodiment of the drive blade 10128 used together with the same components has the same reference numerals plus the number "10000", and the following differences are explained below. In the illustrated embodiment, the support shaft 182 is rotatably coupled to the body 172 of the rotary lift 148, allowing relative rotation between them, rather than as... Figure 5 The rotary lifter 148 in the disclosed embodiment is integrally formed with the main body 172. Therefore, the support shaft 182 is operatively coupled to the transmission device 152 to receive torque from it.

[0089] In the illustrated embodiment, the drive blade 10128 includes a plurality of lifting teeth 10156 extending laterally therefrom to selectively engage the rotary elevator 148. The lowermost tooth 10156A of one of the plurality of teeth 10156 includes a flat portion 10157 and a rounded portion 10158, each configured for engagement with the bearing roller 206 of the rotary elevator 148. Figure 33 Selective engagement. In particular, the flat portion 10157 is formed to engage with any one of the plurality of radial protrusions 214 on the bearing roller 206, rather than the engagement section 210. Conversely, the rounded portion 10158 is formed to engage with any one of the engagement sections 210.

[0090] See also Figures 32-36 The rotary lift 148 can be in a first position relative to the support shaft 182. Figure 33 ) and second position ( Figure 35 and Figure 36The elevator moves between two positions. In the first position, the last tooth 10156A engages with one of the engagement sections 210 of the bearing roller 206. In the second position, the elevator 148 rotates about the support shaft 182 such that the last tooth 10156A does not engage with the bearing roller 206, and the tooth 10156 adjacent to the last tooth 10156A does not contact the bearing roller 206. The elevator 148 is in the first position relative to the support shaft 182 when the drive blade 10128 returns from the BDC position toward the TDC position. After the drive blade 10128 reaches the TDC position and begins to move to the BDC position, the elevator 148 (from...) Figure 33 The reference frame rotates counterclockwise to the second position.

[0091] More specifically, as the drive blade 10128 approaches the TDC position, a contact normal A3 is formed, tangent to one of the lines of the rounded portion 10158 of the last tooth 10156A and the engagement section 210 on the bearing roller 206. A reaction force is applied to the rotary elevator 148 along the contact normal A3, and this reaction force is oriented along the line of action located below the rotation axis of the elevator 148. Therefore, the reaction torque T1 is in a clockwise direction (from... Figure 33 A reference frame is applied to the lifter 148, thereby holding the lifter 148 in the first position as the drive blades 10128 move toward the TDC position. Simultaneously, the bearing roller 206 rotates clockwise about its axis of rotation R1 (from...). Figure 33 The reference frame rotates, while the bearing roller 206 remains in contact with the last tooth 10156A, thereby causing the bearing roller 206 to rotate to the middle position. Figure 34A -B).

[0092] See Figure 34A -B, When the bearing roller 206 rotates to the intermediate position, the rounded portion 10158 of the last tooth 10156A no longer contacts one of the engagement sections 210 of the bearing roller 206. Instead, the flat portion 10157 of the last tooth 10156A moves to engage with two of the plurality of radial protrusions 214 to form a contact normal A3. The line of action of the contact normal A3 remains below the axis of rotation of the lifter 148 until the lifter 148 reaches the TDC position. Thereafter, the contact normal A3 between the flat portion 10157 of the last tooth 10156A and the two radial protrusions 214 of the bearing roller 206 ( Figure 34B The direction is changed, which places the line of action above the axis of rotation of the lifter 148. Therefore, the reaction torque T1 applied to the lifter 148 by the drive blade 10128 is in the counterclockwise direction (from...). Figure 34A The reference frame is redirected, causing the lifter 148 to... Figure 33The first position shown indicates that the drive blade 10128 pivots away from the engagement of the last tooth 10156A. Figure 35 and Figure 36 The second position shown.

[0093] See Figure 35 and Figure 36 When the elevator 148 is in the second position, a gap C is formed between the teeth 10156 of the drive blade 10128 and the bearing roller 206. Figure 36 The gap C allows the tooth 10156 of the drive blade 10128 to pass through the bearing 206 without contacting the bearing 206 as the drive blade 10128 moves to the TDC position.

[0094] See also Figure 35 and Figure 36 When the lifter 148 is in the second position ( Figure 36 Furthermore, the gap C is formed such that when there is no contact between the bearing roller 206 and the drive blade 10128, the drive blade 10128 no longer applies any reaction torque to the elevator 148. Therefore, as the drive blade 10128 moves towards the BDC position, the elevator 148 remains in the second position until the rotational torque applied to the elevator 148 by the motor 144 causes the elevator 148 to rotate backward to contact the drive blade 10128.

[0095] By utilizing the flat portion 10157 on the lowermost tooth 10156A to contact two of the plurality of radial protrusions 214 on the bearing roller 206, the lifter 148 is able to rotate further about the support shaft 182 and can be further away from the drive blade 10128 compared to other fastener drives. This configuration is particularly advantageous in preventing subsequent teeth 10156 of the drive blade 10128 from impacting and damaging the bearing roller 206 as the drive blade 10128 moves from the TDC position to the BDC position.

[0096] Figures 37-38Another embodiment of a fastener driver 11100 according to the present invention is shown, wherein similar components have the same reference numeral plus "11000", and the following differences are explained below. The fastener driver 11000 includes a driver blade 11128 movable within a nose member 11136 between a lower dead center (BDC) position and a top dead center (TDC) position. The driver blade 11128 includes a plurality of pins 11129 supported between two opposing plates 11130. The lowermost pin 11129A of the plurality of pins 11129 includes a roller 11129B. In some embodiments, any of the other pins 11129, other than the lowermost pin 11129A, may include a similar roller 11129B. The fastener actuator 11100 further includes a rotary lifter 11148 defining a body 11172 having a plurality of teeth 11156 radially disposed about and integrally formed therewith for selectively engaging with a plurality of pins 11129 on the actuator blade 11128. The rotary lifter 11148 further includes a bore 11149 for partially receiving a support shaft 182 and a bearing assembly 11151 for rotatably supporting the support shaft 182. In some embodiments, the rotary lifter 11148 receives torque from the drive mechanism 11152 via the support shaft 182. In other embodiments, similar to the rotary lifter 2148, the rotary lifter 11148 may be directly coupled to the drive mechanism 11152 via a spline connection for receiving torque from the drive mechanism 11152. In other embodiments, similar to rotary lift 3148, rotary lift 11148 may be directly coupled to a transmission via a plurality of protrusions extending from the body 11172 of the lift and rotatably supporting the planetary gears of transmission 11152 to receive torque from transmission 11152.

[0097] Figures 43-45Another embodiment of the fastener actuator 12100 according to the present invention is shown, wherein similar components have the same reference numerals plus "12000", and the following differences are explained below. Similar to the fastener actuator 2100, the rotary lifter 12148 is supported by the frame 12132 of the power fastener actuator 12100 and does not include a support shaft. In the illustrated embodiment, the rotary lifter 12148 is supported by a nose member 12136. In other embodiments, the frame 12132 and the nose member 12136 may be integrated as a single piece. The nose member 12136 includes a non-rotatable mounting shaft 12234 extending from the nose member 12136 to support the rotary lifter 12148. In other embodiments, the non-rotatable mounting shaft 12234 may be coupled to and extend from the frame 12132, with the inner cylinder 12120 and the outer cylinder 12140 supported on the frame 12132. The rotary lifter 12148 includes a body 12172 having one side coupled to a non-rotating mounting shaft 12234 and the opposite side directly coupled to a drive 12152 to receive torque from the drive 12152.

[0098] Fastener driver 12100 further includes driver blade 12128 having a plurality of lifting teeth 12156 and latch assembly 12161. Figure 44 The latch assembly 12161 has a pawl or latch 12162 for selectively holding the drive blade 12128 in an intermediate position between the BDC position and the ready position, overcoming a biasing force (i.e., pressurized gas in the compression chamber 142), to allow, for example, a user to clear a card, etc. The intermediate position can be any position where the drive blade 12128 stops between the BDC position and the ready position. A separate actuator 12181 (described further below) is configured to release the latch assembly 12161 from the drive blade 12128. In other words, the latch assembly 12161 is movable between a locked state and a released state, in which the drive blade 12128 is held in the intermediate position (e.g., for clearing a card, etc.), and in the released state, the drive blade 12128 is allowed to be driven toward the driven position by a biasing force.

[0099] Continue to refer to Figures 43-35 The latch 12162 is supported by a support portion 12138 of the nose member 12136. More specifically, the latch 12162 is rotatable about a pivot axis defined by the shaft 12163 of the latch assembly 12161. The latch 12162 also includes a protrusion 12165 extending from the latch 12162, as further described below.

[0100] The latch 12162 is movable between a locked position (corresponding to the locked state of the latch assembly 12161) and a released position (corresponding to the released state of the latch assembly 12161). In the locked position, the latch 12162 engages with one of a plurality of protrusions 12159 on the driver blade 12128 to hold the driver blade 12128 in an intermediate position. In the released position, the latch 12162 is movable away from the driver blade 12128 to allow the driver blade 12128 to be driven by a gas spring from the intermediate position to the driven position.

[0101] Figures 43-45 An actuator assembly 12181 of the latch assembly 12161 is also shown for selectively releasing the latch 12162 from the driver blade 12128. The actuator assembly 12181 is integrated with the lifting assembly 12116 for selectively moving the latch 12162 from a locked position to a released position. In some embodiments, the latch assembly 12161 is manually operated via the actuator assembly 12181. The actuator assembly 12181 includes an actuator member 12183 and a cam member 12185. The actuator member 12183 defines a body portion including a first end 12184 and a second end 12187. The body portion defines an elongated slot 12189 for receiving a protrusion 12165 on the latch 12162. Cam member 12185 is coupled to rotate with lifter 12148 to selectively engage first end 12184 of actuator member 12183 to move actuator member 12183 from a locked position to a released position, thereby moving latch 12162 from the locked position to the released position. Actuator assembly 12181 further includes a biasing member (e.g., a spring, not shown) configured to bias actuator member 12183 into engagement with cam member 12185.

[0102] In operation, as the lifter 12148 returns to the driver blade 12128 toward the TDC position, the biasing member is configured to bias the actuator member 12183 toward the lifter 12148, and the protrusion 12165 is positioned toward one end of the elongated slot 12189, thereby positioning the latch 12162 in a locked position (not shown) where the latch 12162 contacts one of the plurality of protrusions 12159 on the driver blade 12128. As the driver blade 12182 approaches the TDC position, the cam member 12185 engages the actuator member 12183 to move the actuator member 12183 away from the lifter 12148 and cause the latch 12162 to move from the locked position about the shaft 12163. Figure 45 The elongated slot 12189 pivots toward the release position. During this movement, the elongated slot 12189 moves relative to the protrusion 12165 as the actuator member 12183 moves, positioning the protrusion 12165 closer to the opposite side of the elongated slot 12189.

[0103] Although certain preferred embodiments have been described in detail in this utility model, variations and modifications may still exist within the scope and spirit of one or more independent aspects of the invention.

[0104] The various features created by this invention are described in the claims.

Claims

1. A power fastener driver, characterized in that, include: A driver blade, which can move from the top dead center position toward the driven or bottom dead center position, for driving the fastener into the workpiece; A nose element, through which the fastener is driven into the workpiece, the nose element being configured to guide the driver blades and the fastener as the driver blades drive the fastener into the workpiece. A lifting assembly for providing torque to move the drive blade from the bottom dead center position toward the top dead center position, the lifting assembly including a rotary lifter configured to selectively engage the drive blade to move the drive blade toward the top dead center position, the rotary lifter including... The main body, having a central hole, and A flange extending radially from the body defines an outer radial profile configured to contact the driver blade so that the driver blade returns from the lower dead center position toward the upper dead center position; as well as A non-rotatable mounting shaft coupled to the central bore to rotatably support the rotary lift thereon.

2. The power fastener driver as described in claim 1, characterized in that, The lifting assembly further includes a transmission device configured to provide torque to the rotary lifter.

3. The power fastener driver as described in claim 2, characterized in that, The main body is directly coupled to the transmission device.

4. The power fastener driver as described in claim 1, characterized in that, The non-rotating mounting shaft extends from the nose of the power fastener driver.

5. The power fastener driver as described in claim 1, characterized in that, It further includes a frame for supporting the lifting assembly, wherein the non-rotational mounting shaft is coupled to and extends from the frame.

6. The power fastener driver as described in claim 5, characterized in that, The non-rotating mounting shaft is coupled to the central hole via a bearing assembly to rotatably couple the body to the frame.

7. The power fastener driver as described in claim 1, characterized in that, The rotary lifter further includes a plurality of pins disposed around the body.

8. The power fastener driver as described in claim 7, characterized in that, The rotary lifter further includes a plurality of rollers supported by respective pins for contacting the drive blades.

9. The power fastener driver as described in claim 8, characterized in that, Each of the plurality of pins extends from the flange.

10. The power fastener driver as claimed in claim 9, characterized in that, The plurality of pins and the plurality of rollers together define the outer radial profile of the flange.

11. The power fastener driver as claimed in claim 2, characterized in that, The main body is splined to the transmission device to receive torque from the transmission device.

12. The power fastener driver as described in claim 5, characterized in that, Further includes: The housing, which supports the frame, outer cylinder, and The inner cylinder is located inside the outer cylinder.

13. The power fastener driver as described in claim 12, characterized in that, The outer cylinder is integrally formed with the frame.

14. The power fastener driver as claimed in claim 1, characterized in that, Further includes: A shaft extending through the nose and defining a pivot axis, and A latch, pivotally supported on the shaft, selectively holds the driver blade in an intermediate position between the lower dead center position and the upper dead center position or near the upper dead center position, overcoming bias forces.

15. The power fastener driver as described in claim 14, characterized in that, The latch pivots about the pivot axis between a locked position and a released position. In the locked position, the latch engages with the driver blade to hold the driver blade in the intermediate position. In the released position, the latch pivots away from the driver blade to allow the driver blade to move.

16. The power fastener driver as claimed in claim 14, characterized in that, It further includes an actuator assembly for selectively releasing the latch from the drive blade in the intermediate position, the actuator assembly including an actuator member, a cam coupled to the rotary lifter to rotate with the rotary lifter, and a biasing member for biasing the actuator member to engage with the cam.

17. The power fastener driver as claimed in claim 16, characterized in that, When the cam engages the actuator component, the latch pivots about the pivot axis and disengages from the drive blade.

18. A power fastener driver, characterized in that, include: A driver blade, which can move from the top dead center position toward the driven or bottom dead center position, for driving the fastener into the workpiece; A nose element, through which the fastener is driven into the workpiece, the nose element being configured to guide the driver blade and the fastener as the driver blade drives the fastener into the workpiece; A lifting assembly for providing torque to move the drive blade from the bottom dead center position toward the top dead center position, the lifting assembly including a rotary lifter configured to selectively engage the drive blade to move the drive blade toward the top dead center position, the rotary lifter including... The main body, having a central hole, and A flange extending radially from the body defines an outer radial profile configured to contact the driver blades so that the driver blades return from the lower dead center position toward the upper dead center position, the flange including a plurality of rollers arranged radially around the body to define the outer radial profile; and A non-rotatable mounting shaft coupled to the central bore to rotatably support the rotary lifter thereon; The shape of the last roller among the plurality of rollers is designed to be different from that of the other rollers among the plurality of rollers.

19. The power fastener driver as claimed in claim 18, characterized in that, It further includes a frame for supporting the lifting assembly, the frame being integrally formed with the nose piece.

20. The power fastener driver as claimed in claim 19, characterized in that, The frame includes an upper flange, wherein the upper flange supports an inner cylinder and an outer cylinder.

21. A power fastener driver, characterized in that, include: A driver blade, which can move from the top dead center position toward the driven or bottom dead center position, for driving the fastener into the workpiece; A nose element, through which the fastener is driven into the workpiece, the nose element being configured to guide the driver blades and the fastener as the driver blades drive the fastener into the workpiece. A lifting assembly for providing torque to move the drive blade from the bottom dead center position toward the top dead center position, the lifting assembly including a rotary lifter configured to selectively engage the drive blade to move the drive blade toward the top dead center position, the rotary lifter including... The main body, and A plurality of protrusions extending from the body; as well as A transmission device configured to provide torque to the rotary lifter, the transmission device being directly coupled to the body of the lifter via the plurality of protrusions.

22. The power fastener driver as claimed in claim 21, characterized in that, The rotary lifter further includes: A central hole is formed within the body. A plurality of pins, the plurality of pins being arranged around the periphery of the body, and A plurality of rollers are disposed on the plurality of pins for contacting the driver blades.

23. The power fastener driver as described in claim 22, characterized in that, The shape of the last roller of the plurality of rollers is designed to be different from that of the other rollers of the plurality of rollers.

24. The power fastener driver as claimed in claim 23, characterized in that, It further includes a non-rotatable mounting shaft coupled to the central bore to rotatably support the rotary lift thereon.

25. The power fastener driver as claimed in claim 24, characterized in that, It further includes a bearing disposed between the non-rotating mounting shaft and the body of the rotary lifter.

26. The power fastener driver as claimed in claim 24, characterized in that, The non-rotating mounting shaft extends from the nose piece.

27. The power fastener driver as claimed in claim 24, characterized in that, It further includes a frame for supporting the lifting assembly, wherein the non-rotational mounting shaft is coupled to and extends from the frame.

28. The power fastener driver as claimed in claim 22, characterized in that, Each of the plurality of pins is suspended from the body of the rotary lifter.

29. The power fastener driver as claimed in claim 23, characterized in that, The last roller is an alignment ring, which includes an arm extending from the ring, a recess, and a biasing member. The recess forms an engagement section for selectively engaging the driver blade, and the biasing member is configured to rotatably bias the alignment ring toward a position where the engagement section contacts the driver blade.

30. The power fastener driver as claimed in claim 27, characterized in that, The frame includes one or more bearings positioned between the body of the lifter and the frame for rotatably supporting the body of the rotary lifter.

31. The power fastener driver as claimed in claim 21, characterized in that, The transmission device further includes at least one planetary gear stage with a plurality of planetary gears, each planetary gear being supported on one of the plurality of protrusions.

32. The power fastener driver as claimed in claim 21, characterized in that, The rotary lifter further includes: A central hole, the central hole being formed within the body, and A plurality of teeth are arranged around the periphery of the body for contacting the driver blades.

33. The power fastener driver as described in claim 32, characterized in that, The drive blade includes a plurality of pins configured to selectively engage with the plurality of teeth on the rotary lifter.

34. A power fastener driver, characterized in that, include: A driver blade, which can move from the top dead center position toward the driven or bottom dead center position, for driving the fastener into the workpiece; A lifting assembly for providing torque to move the drive blade from the bottom dead center position toward the top dead center position, the lifting assembly including a rotary lifter configured to selectively engage the drive blade to move the drive blade toward the top dead center position, the rotary lifter including... A cylindrical body, which is rotatable about a rotation axis. A flange that extends radially outward from the cylindrical body. A plurality of pins are arranged around the periphery of the body, each of the plurality of pins extending from the opposite side of the flange. A plurality of rollers, each mounted on a respective pin and positioned on the opposite side of the flange, and A cantilevered support shaft extends from the main body along the axis of rotation and is coupled to rotate together with the cylindrical main body; as well as A transmission device configured to provide torque to the rotary lift axially via the cantilever support.

35. The power fastener driver as described in claim 34, characterized in that, The roller is configured to sequentially contact the driver blades to move the driver blades toward the top dead center position.

36. The power fastener driver as described in claim 35, characterized in that, One of the plurality of rollers is a bearing roller that includes a non-cylindrical outer peripheral surface.

37. The power fastener driver as described in claim 36, characterized in that, The non-cylindrical outer peripheral surface includes a plurality of radial protrusions that define valleys therebetween to form engagement sections, the engagement sections being sized to contact the actuator blades.

38. The power fastener driver as described in claim 36, characterized in that, The rotary lifter further includes a stop formed in the body to act on the bearing roller when the bearing roller is not engaged with the drive blade to limit the rotation of the bearing roller.

39. The power fastener driver as described in claim 35, characterized in that, The flange includes a plurality of holes, wherein the plurality of pins are individually formed in the rotary lifter and disposed within the plurality of holes.

40. The power fastener driver as described in claim 39, characterized in that, One of the plurality of pins includes an integrated bearing roller.

41. The power fastener driver as described in claim 34, characterized in that, The cantilever support shaft is integrally formed with the rotary lifter.

42. The power fastener driver as described in claim 34, characterized in that, The cantilever support shaft includes a first bearing and a second bearing. The first bearing is coupled to the cantilever support shaft adjacent to the main body, and the second bearing is coupled to the cantilever support shaft away from the main body.

43. The power fastener driver as described in claim 42, characterized in that, The cantilever support shaft is coupled to the transmission device adjacent to the second bearing.

44. A power fastener driver, characterized in that, include: A driver blade, movable from a top dead center position toward a driven or bottom dead center position, for driving a fastener into a workpiece, the driver blade including a lowermost drive tooth having a flat portion; A drive unit for providing torque to move the driver blade from the lower dead center position toward the upper dead center position, the drive unit including a support shaft; A rotary lifter, which can engage with the drive blade, receives torque from the drive unit in the rotational direction to return the drive blade from the lower dead center position to the upper dead center position. The lifter includes a plurality of lifting pins and a roller rotatably supported on one of the lifting pins for selective engagement with the flat portion of the lowermost drive tooth. as well as An ejection arrangement is defined between the roller and the lowermost drive tooth, the ejection arrangement being configured to allow limited movement of the lifter relative to the support shaft between a first position and a second position; Wherein, when the drive blade returns from the lower dead center position toward the upper dead center position, the lifter is in the first position relative to the support shaft, and The ejection arrangement allows the lifter to rotate from the first position to the second position relative to the support shaft in the opposite direction of rotation, so as to form a gap between the drive blade and the roller after the drive blade reaches the top dead center position.

45. The power fastener driver as described in claim 44, characterized in that, The roller is a bearing roller that includes a non-circular outer peripheral surface.

46. ​​The power fastener driver as described in claim 45, characterized in that, The non-circular outer peripheral surface includes a plurality of radial protrusions, each of which defines a valley, and each valley forms a joint section.

47. The power fastener driver as claimed in claim 46, characterized in that, When the roller engages with the lowermost drive tooth, a contact normal is formed between the flat portion of the lowermost drive tooth and two radial protrusions of the plurality of radial protrusions, and wherein a reaction torque is applied to the rotary elevator by the drive blades along the contact normal to move the rotary elevator to the second position about the support shaft.

48. The power fastener driver as described in claim 44, characterized in that, The driver blade further includes a plurality of teeth that pass through the roller via the gap as the driver blade moves from the top dead center position to the bottom dead center position.

49. The power fastener driver as claimed in claim 47, characterized in that, When the reaction torque is no longer applied to the rotary lift, the support shaft rotates the rotary lift back to the first position in response to receiving torque from the drive unit.

50. A power fastener driver, characterized in that, include: A driver blade, movable from a top dead center position toward a driven or bottom dead center position, for driving a fastener into a workpiece, the driver blade comprising a plurality of pins; A nose member, through which the fastener is driven into the workpiece, the nose member being configured to guide the driver blade and the fastener as the driver blade drives the fastener into the workpiece. A lifting assembly for providing torque to move the drive blade from the bottom dead center position toward the top dead center position, the lifting assembly including a rotary lifter configured to selectively engage the drive blade to move the drive blade toward the top dead center position, the rotary lifter including... A plurality of teeth, arranged around the periphery of the body, are used to sequentially contact the pins on the driver blades to return the driver blades from the lower dead center position toward the upper dead center position.

51. The power fastener driver as described in claim 50, characterized in that, The driver blade further includes an opposing plate for supporting each of the plurality of pins at its opposite ends.

52. The power fastener driver as described in claim 50, characterized in that, One or more of the plurality of pins includes a roller for sequentially contacting the plurality of teeth of the rotary lifter.

53. The power fastener driver as described in claim 50, characterized in that, It further includes a transmission device for providing torque to the rotary lift.

54. The power fastener driver as described in claim 53, characterized in that, The body includes a central hole, and wherein, The rotary lifter further includes a support shaft partially received within the bore, the support shaft being coupled to the transmission device to receive torque from the transmission device.

55. The power fastener driver as described in claim 53, characterized in that, The body includes a central hole that is splined to the output shaft of the transmission device to receive torque from the transmission device.

56. The power fastener driver as described in claim 53, characterized in that, The rotary lifter includes a plurality of protrusions extending from the body, and wherein the transmission includes at least one planetary gear stage with a plurality of planetary gears, each planetary gear being supported on one of the plurality of protrusions.

57. The power fastener driver as described in claim 50, characterized in that, The plurality of teeth are integrally formed with the main body.

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