Extension rod assembly for power tools and electric fastener driver assembly
By designing a power tool extension rod assembly that includes a mounting section, an extension rod, a handle, and an actuator linkage, the problem of remote operation and trigger control of power tools is solved, enabling convenient remote operation and trigger control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MILWAUKEE ELECTRIC TOOL CORP
- Filing Date
- 2025-07-03
- Publication Date
- 2026-07-31
AI Technical Summary
In the prior art, the extension rod assembly of power tools is difficult to operate remotely and effectively trigger, which limits the user's operation.
An extension rod assembly has been designed, including a mounting part, an extension rod, a handle, and an actuator linkage. Through the cooperation of a shaft, hook, and lever, it enables remote control of the trigger of a power tool and can be optionally equipped with a wireless communication protocol.
It enables remote operation of power tools and convenient control of triggers, enhancing the user's operational flexibility and safety.
Smart Images
Figure CN224575608U_ABST
Abstract
Description
[0001] Cross-reference to related applications
[0002] This application claims priority to U.S. Provisional Patent Application No. 63 / 667,851, filed July 5, 2024, the entire contents of which are incorporated herein by reference. Technical Field
[0003] This utility model relates to power tools, and more specifically to an extension rod assembly for supporting power tools. Background Technology
[0004] Users may wish to operate power tools remotely, with the tools supported at a distance from the user. Extension rod assemblies allow users to operate power tools remotely. Utility Model Content
[0005] In one aspect, the present invention provides an extension rod assembly for a power tool. The extension rod assembly includes a mounting portion having a first mounting portion and a second mounting portion. The second mounting portion pivots relative to the first mounting portion to at least partially enclose the power tool within the mounting portion. The extension rod assembly includes an extension rod having a first extension rod end and an opposite second extension rod end coupled to the mounting portion. The extension rod assembly includes a handle coupled to the first extension rod end. The handle can be gripped by a user of the power tool. The extension rod assembly includes an actuator link extending between the first and second extension rod ends. The actuator link includes a shaft extending between the first and second extension rod ends, a hook supported by the mounting portion and having a first portion that engages a trigger of the power tool when supported within the mounting portion, and a lever pivotally coupled to the mounting portion and having a first lever end adjacent to the shaft and a second lever end coupled to the second portion of the hook. In response to movement of the shaft within the extension rod, the lever can pivot from a first position toward a second position, in which the first portion of the hook presses the power tool trigger.
[0006] In some embodiments, the extension rod assembly further includes a spring that biases the lever toward the first position.
[0007] In some embodiments, the extension rod assembly further includes a wireless communication protocol configured to remotely control the power tool.
[0008] In another aspect, the present invention provides an electric fastener driver assembly. The electric fastener driver assembly includes an electric fastener driver comprising a housing having a driver portion and a handle portion extending from the driver portion, within which a reciprocating drive blade is movable. The electric fastener driver assembly includes an extension rod assembly comprising a mounting portion having a first mounting portion and a second mounting portion. The second mounting portion pivots relative to the first mounting portion to at least partially enclose the electric fastener driver within the mounting portion. The extension rod assembly includes an extension rod having a first extension rod end and an opposite second extension rod end coupled to the mounting portion. The extension rod assembly includes a handle coupled to the first extension rod end. The handle can be gripped by a user of the electric fastener driver. The extension rod assembly includes an actuator link extending between the first and second extension rod ends. The actuator linkage includes a shaft extending between a first extension rod end and a second extension rod end; a hook supported by a mounting portion and having a first portion that engages a trigger of an electric fastener driver when supported within the mounting portion; and a lever pivotally coupled to the mounting portion and having a first lever end adjacent to the shaft and a second lever end coupled to the second portion of the hook. In response to movement of the shaft within the extension rod, the lever can pivot from a first position toward a second position, in which the first portion of the hook presses against the trigger of the electric fastener driver, wherein the mounting portion at least partially surrounds the driver portion of the housing.
[0009] In some embodiments, the electric fastener driver assembly further includes a wireless communication protocol configured to remotely control the electric fastener driver.
[0010] In some embodiments, the electric fastener driver assembly further includes a spring that biases the lever toward the first position.
[0011] On the other hand, the present invention provides an extension rod assembly for a power tool. The extension rod assembly includes a carbon fiber mounting portion having a first mounting portion and a second mounting portion. The second mounting portion pivots relative to the first mounting portion to at least partially enclose the power tool within the mounting portion. The extension rod has a first extension rod end and an opposite second extension rod end coupled to the mounting portion. A handle is coupled to the first extension rod end. The handle is gripped by the user of the power tool. An actuator link extends between the first and second extension rod ends. The actuator link includes a lever pivotally coupled to the mounting portion. The lever is pivotable from a first position toward a second position to actuate the power tool.
[0012] In some embodiments, the extension rod assembly further includes a spring that biases the lever toward the first position.
[0013] Other features and aspects of this utility model will become apparent from the following detailed description and accompanying drawings. Attached Figure Description
[0014] Figure 1 This is a perspective view of a user operating an electric fastener driver and extension rod assembly according to an embodiment of the present invention.
[0015] Figure 2 yes Figure 1 A three-dimensional view of the extension rod assembly.
[0016] Figure 3 yes Figure 1 Side view of the extension rod assembly.
[0017] Figure 4 yes Figure 1 extension rod assembly along Figure 5 The cross-sectional view of section line 4-4 in the figure.
[0018] Figure 5 yes Figure 1 A bottom view of the extension rod assembly.
[0019] Figure 6 yes Figure 1 Top view of the extension rod assembly.
[0020] Figure 7 yes Figure 1 Front view of the extension rod assembly.
[0021] Figure 8 yes Figure 1 Rear view of the extension rod assembly.
[0022] Figure 9 yes Figure 1 extension rod assembly along Figure 6 The cross-sectional view of section line 9-9 in the figure.
[0023] Figure 10 yes Figure 1 A rear perspective perspective sectional view of a portion of the actuator link of the extension rod assembly, schematically showing the trigger of the attached power tool.
[0024] Figure 11 yes Figure 10 A rear-view stereoscopic sectional view of a portion of the actuator linkage, in which the power tool trigger has been removed.
[0025] Figure 12 yes Figure 10 A front-view stereoscopic sectional view of a portion of the actuator linkage, in which the power tool trigger has been removed.
[0026] Figure 13 yes Figure 1 Side view of the extension rod and handle of the extension rod assembly.
[0027] Before explaining any embodiment of this utility model in detail, it should be understood that the application of this utility model is not limited to the details of the construction and arrangement of the components described in the following description or shown in the drawings. This utility model 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 utility model are for illustrative purposes and should not be considered restrictive. Detailed Implementation
[0028] See Figure 1 , Figure 2 , Figure 3 and Figure 13 An extension rod assembly 10 for use with power tools (e.g., an electric fastener actuator similar to a concrete nail gun) includes a mounting portion 18, an extension rod 14, a handle 182, and an actuator link 52. The mounting portion 18 includes a first mounting portion 24 and a mating second mounting portion 26. The second mounting portion 26 pivots relative to the first mounting portion 24 about hinges 30a, 30b to at least partially enclose the power tool between the first mounting portion 24 and the second mounting portion 26 within a power tool receiving recess 34 (i.e., within the mounting portion 18). The mounting portion 18 includes a front side 18 and an opposite rear side 20. In some embodiments, the mounting portion 18 may be partially or entirely made of carbon fiber material to reduce weight while maintaining high tensile strength.
[0029] See Figure 2 and Figure 4 The head screws 42a and 42b selectively fasten the first mounting portion 24 to the second mounting portion 26, thereby securing the power tool within the mounting portion 18. A through hole 118a extends through both the first mounting portion 24 and the second mounting portion 26 to accommodate the head screw 42a. Figure 4 A threaded insert 122a is positioned within a through hole 118a to provide an internal thread for mating with the external thread on the head screw 42a. A similar through hole and insert are provided to receive the head screw 42b.
[0030] See Figure 5 When the power tool is received in the mounting portion 18, the handle receiving portion 38 of the mounting portion 18 receives the handle or grip of the power tool. The handle receiving portion 38 includes an open bottom end portion 86 defining a hole 90 through which the bottom end portion of the power tool handle extends.
[0031] See Figure 6The second mounting portion 26, relative to the first mounting portion 24, surrounds the hinges 30a and 30b at (e.g.) Figure 4 and Figure 6 (As shown) it pivots between an open position and a closed position. In the closed position, the second mounting portion 26 mates with the first mounting portion 24 along the seam 78. The second mounting portion 26 includes a viewing window 82 to provide visual and / or physical access to the power tool when it is housed within the mounting portion 18. The viewing window 82 also provides access to cooling airflow for the power tool.
[0032] See Figure 7 The first mounting portion 24 includes a large first flare 98 and an adjacent first inner flange 102 at the front side 19 of the mounting portion 18. The second mounting portion 26 includes a small second flare 106 and an adjacent second inner flange 110 at the front side 19 of the mounting portion 18. The dimensions and shapes of the first flare 98, the first inner flange 102, the second flare 106, and the second inner flange 110 can be designed to accommodate a power tool, to hold the power tool within the mounting portion 18, and to provide the power tool with access to cooling airflow while holding the power tool within the mounting portion 18.
[0033] See Figure 2 and Figure 13 The extension rod 14 includes a first extension rod end 46 ( Figure 13 ) and the opposite second extension rod end 50 ( Figure 2 Extension rod 14 defines the longitudinal axis B. Figure 13 The extension rod 14 can be a multi-piece extension rod 14 with interconnecting sections, the interconnecting sections including a first section 43 (which includes a first extension rod end 46; as shown in the image). Figure 13 (as shown) and a second section 45 attached to the first section 43 (which includes the end 50 of the second extension rod; as shown) Figure 2 (As shown). Depending on the desired length of the extension rod 14, the extension rod 14 may include an additional intermediate section. In the illustrated embodiment, the first section 43 includes a first fastener portion 202 (e.g., an internally threaded section 202) attached to the second section 45 at the second fastener portion 44 (e.g., an externally threaded section 44). The mounting portion 18 is attached to the extension rod 14 at the second extension rod end 50.
[0034] See also Figure 13The handle 182 includes a first handle end 183 connected to a first extension rod end 46 of the extension rod 14 and an opposite second handle end 184. The handle 182 includes a grip portion 186 between the first handle end 183 and the second handle end 184. The grip portion 186 is cylindrical and is gripped by the user of the power tool. In some embodiments, the handle 182 includes a damper 210 (e.g., a cylindrical or annular foam piece) located at the first handle end 183. And, in some embodiments, the handle 182 includes a shock absorber 214, which may be made of rubber, at the second handle end 184 (i.e., at the end of the handle 182 opposite to the mounting portion 18).
[0035] See Figure 2 , 9 10 and 13, actuator link 52 extends between handle 182 and mounting portion 18. Actuator link 52 includes shaft 28, first lever 58, hook 62, biasing member 66 (e.g., tension spring), and second lever 190. Shaft 28 extends from first extension rod end 46 through extension rod 14 to second extension rod end 50. In some embodiments, shaft 28 may include a plurality of interconnected segments. For example, in embodiments where extension rod 14 includes multiple interconnected segments (such as first segment 43 and second segment 45), shaft 28 may include multiple interconnected segments corresponding to segments 43, 45 of extension rod 14. Shaft 28 may be along actuation direction 170 ( Figure 12 The first lever 58, hook 62, and spring 66 can be positioned in an unacted position relative to the extension rod 14, depending on the position of the shaft 28. Figures 10-12 (as shown), fully actuated position, or position in between. In the fully actuated position, shaft 28 is maximally oriented towards the front side 19 of mounting portion 18 (as shown). Figure 3 The hook 62 extends away from the front side 19 of the mounting portion 18 and toward the rear side 20 of the mounting portion 18. Figure 3 The shaft 28, the first lever 58, and the hook 62 can be positioned in various positions between an unactuated position and a fully actuated position. In the illustrated embodiment, the shaft 28, the first lever 58, and the hook 62 can be continuously adjusted between the unactuated position and the fully actuated position. See also Figure 8 The joint 78 of the mounting portion 18 defines plane A. The shaft 28 is offset to one side of plane A. More specifically, the shaft 28 is offset to the same side of plane A as the first lever 58, the same side of plane A as the hook 62, and the same side of plane A as the spring 66. The shaft 28 is offset to the same side of plane A as the first mounting portion 24.
[0036] See Figures 10-12The shaft 28 is directly (or indirectly in some embodiments) adjacent to the first lever 58, such that movement of the shaft 28 (e.g., linear motion) is transmitted to movement of the first lever 58 (e.g., pivoting motion). The first lever 58 is pivotally attached to the mounting portion 18 and includes a first end 164 and a opposite second end 165. The first end 164 has an abutment protrusion 166 that slides in contact with the distal end of the shaft 28, and the second end 165 is pivotally coupled to the hook 62 via a through-hole 126. A pin 94 (e.g., a fastener such as a bolt, rivet, etc.) serves as the pivot point of the first lever 58. The first lever 58 includes a concave bend 178 positioned between the pin 94 and the first end 164. The concave bend 178 may at least partially define the abutment protrusion 166.
[0037] See also Figures 10-12 Hook 62 is attached to the first lever 58, which causes the pivoting motion of the first lever 58 to be transmitted to hook 62 in the form of motion of hook 62 in a direction generally parallel to the actuation direction 170 of axis 28. See also Figure 10 The trigger 114 of the power tool is shown within the mounting portion 18 to indicate the approximate position of the trigger 114 relative to the other components of the extension rod assembly 10. The hook 62 is located at the first end 134 ( Figure 11 The first end 134 extends between the first end 134 and the opposite second end 130, and is close to the trigger 114 to engage and press the trigger 114. The hook 62 moves away from the first end 134 and toward the second end 130, and includes a first bend 154, a second bend 150, a third bend 146, a fourth bend 142, and a fifth bend 138. Figure 11 See also Figure 11 The mounting portion 18, and more specifically in some embodiments, the second mounting portion 26 includes a first recess 158 and a second recess 162 transverse to the first recess 158. When in the unactuated position, the first end 134 of the hook 62 is received in the first recess 158. As the actuator link 52 moves from the unactuated position toward the fully actuated position, the first end 134 of the hook 62 is within the second recess 162 in a first direction (i.e., toward). Figure 3 The first end 134 of the hook 62 slides on the rear side 20 of the mounting portion 18 shown, and when the actuator linkage 52 moves toward the unacted position, the first end 134 of the hook 62 moves in the second direction (i.e., toward the rear side 20 of the mounting portion 18 shown), and when the actuator linkage 52 moves toward the unacted position, the first end 134 of the hook 62 moves in the second direction (i.e., Figure 3 It slides on the front side 19) of the mounting part 18 shown.
[0038] See Figures 10-12Spring 66 biases the adjacent protrusion 166 of the first lever 58 to contact the shaft 28, causing the movement of the shaft 28 toward the front side 19 of the mounting portion 18 in the actuation direction 170 to pivot the first lever 58 in the rotation direction 174. Spring 66 is in the first attachment position 70 and the second attachment position 74. Figure 3 Extending between ) . The first attachment position 70 is provided on the hook 62, and the second attachment position 74 is provided on the mounting portion 18, and more specifically, in the illustrated embodiment, the second attachment position 74 is provided on the first mounting portion 24 ( Figure 3 Spring 66 biases hook 62 to the unacted position and provides controlled resistance to prevent hook 62 from moving from the unacted position to the fully actuated position. In the absence of user actuation, spring 66 also biases hook 62 toward the unacted position.
[0039] See Figure 13 The second lever 190 is positioned adjacent to the handle 182 and extends generally parallel to the handle portion 186, or in some embodiments extends at an angle relative to the handle portion 186. The second lever 190 is mounted to the bracket 204 and pivots about a pivot axis 206 when actuated by the user. Movement of the second lever 190 about the pivot axis 206 causes linear movement of the shaft 28 along the actuation direction 170 as described above, which results in the power tool ( Figure 10 Selective actuation of trigger 114.
[0040] See also Figure 13 In some embodiments, the extension rod assembly 10 may include a wireless communication protocol 218 (e.g., Bluetooth) to replace the actuator link 52 or to remotely operate the power tool outside of the actuator link 52. In some embodiments, a battery pack 222 powering the power tool is mounted to the extension rod 14 and / or the handle 182. Current from the battery pack 222 is transmitted to the power tool via the extension rod 14.
[0041] At work, and see Figure 2 , Figure 10 and Figure 13 The user can press the second lever 190 toward the handle portion 186 to move the shaft 28 forward (i.e. toward the mounting portion 18), thereby causing the first lever 58 to... Figure 12The second lever 190 pivots in the clockwise direction of rotation 174 as shown. With the hook 62 pivotally attached to the second end 165 of the first lever 58, the hook 62 translates rearward (i.e., toward the extension rod 14), thereby tightening the spring 66 and pressing the trigger 114 to activate the power tool. In other words, the second lever 190 can pivot between an unactuated (or “unactuated”) position corresponding to the unactuated position of the first lever 58 and a fully actuated position corresponding to the fully actuated position of the first lever 58. When the user releases the second lever 190, the tension spring 66 rebounds, causing the first lever 58 to pivot back to its original position. Figure 10 , Figure 11 and Figure 13 The non-actuated position is shown, and the hook 62 is translated in the forward direction to release the power tool trigger 114, which deactivates the power tool.
[0042] In some embodiments, the second lever 190 and bracket 204 can be selectively rotated about the longitudinal axis B and the first segment 43 of the extension rod 14 to allow the user to adjust the orientation of the mounting portion 18, and thus the orientation of the power tool housed within the mounting portion 18 relative to the user's hand, without adjusting the orientation of the mounting portion 18 or the power tool relative to the extension rod 14. The damper 210 attenuates vibrations and / or shocks from the power tool, thereby reducing the vibrations and / or shocks felt by the user's hand when in the handle portion 186. The shock absorber 214 can absorb vibrations if the extension rod assembly 10 falls.
[0043] Although the present invention has been described in detail with reference to certain preferred embodiments, variations and modifications may still exist within the scope and spirit of one or more independent aspects of the present invention.
Claims
1. An extension rod assembly for a power tool, characterized by, The extension rod assembly includes: The mounting portion includes a first mounting portion and a second mounting portion, the second mounting portion being configured to pivot relative to the first mounting portion to at least partially enclose the power tool within the mounting portion; An extension rod having a first extension rod end and an opposite second extension rod end, the second extension rod end being coupled to the mounting portion; A handle, coupled to the end of the first extension rod, which will be gripped by the user of the power tool; and An actuator link extending between the end of the first extension rod and the end of the second extension rod, the actuator link comprising: A shaft extending between the end of the first extension rod and the end of the second extension rod. A hook, supported by the mounting portion and having a first portion configured to engage a trigger of the power tool when supported within the mounting portion, and A lever, the lever being pivotally coupled to the mounting portion and having a first lever end adjacent to the shaft and a second lever end coupled to a second portion of the hook; In response to movement of the shaft within the extension rod, the lever can pivot from a first position toward a second position, in which a first portion of the hook presses the trigger of the power tool.
2. The extension pole assembly of claim 1, wherein, It further includes a spring that biases the lever toward the first position.
3. The extension pole assembly of claim 1, wherein, The lever is a first lever, wherein the actuator link further includes a second lever adjacent to the handle and coupled to the shaft, and wherein the second lever is pivotable between a non-actuated position corresponding to the first position of the first lever and an actuated position corresponding to the second position of the first lever.
4. The extension pole assembly of claim 3, wherein, The orientation of the second lever on the extension rod is adjustable about the longitudinal axis of the extension rod to adjust the orientation of the mounting portion relative to the user's hand without adjusting the orientation of the mounting portion relative to the extension rod.
5. The extension pole assembly of claim 1, wherein, It further includes a wireless communication protocol configured to remotely control the power tool.
6. The extension rod assembly as claimed in claim 1, characterized in that, It further includes a battery pack mounted to the extension rod, wherein current from the battery pack powers the power tool.
7. The extension rod assembly as claimed in claim 1, characterized in that, It further includes a battery pack mounted to the handle, wherein current from the battery pack powers the power tool.
8. The extension rod assembly as claimed in claim 1, characterized in that, The handle includes a cylindrical foam damper adjacent to the grip portion of the handle, wherein the damper is configured to attenuate vibrations transmitted from the power tool toward a user gripping the handle portion.
9. The extension rod assembly as claimed in claim 1, characterized in that, The handle includes a rubber shock absorber at the end of the handle opposite to the mounting portion.
10. An electric fastener driver assembly, characterized in that, include: An electric fastener driver includes a housing having a drive portion and a handle portion extending from the drive portion, wherein a reciprocating drive blade is movable within the drive portion, and Extension rod assembly, the extension rod assembly comprising: The mounting portion includes a first mounting portion and a second mounting portion, the second mounting portion being configured to pivot relative to the first mounting portion to at least partially enclose the electric fastener driver within the mounting portion. The extension rod has a first extension rod end and an opposite second extension rod end coupled to the mounting portion. A handle, coupled to the end of the first extension rod, is gripped by the user of the electric fastener actuator. An actuator link extending between the end of the first extension rod and the end of the second extension rod, the actuator link comprising: A shaft extending between the end of the first extension rod and the end of the second extension rod. A hook, supported by the mounting portion and having a first portion configured to engage a trigger of the electric fastener driver when supported within the mounting portion, and A lever, pivotally coupled to the mounting portion and having a first lever end adjacent to the shaft and a second lever end coupled to a second portion of the hook. In response to movement of the shaft within the extension rod, the lever can pivot from a first position toward a second position, in which a first portion of the hook presses against the trigger of the electric fastener driver, wherein the mounting portion at least partially surrounds the driver portion of the housing.
11. The electric fastener driver assembly as claimed in claim 10, characterized in that, The lever is a first lever, wherein the actuator link further includes a second lever adjacent to the handle and coupled to the shaft, and wherein the second lever is pivotable between a non-actuated position corresponding to the first position of the first lever and an actuated position corresponding to the second position of the first lever.
12. The electric fastener driver assembly as claimed in claim 10, characterized in that, It further includes a wireless communication protocol configured to remotely control the electric fastener driver.
13. The electric fastener driver assembly as claimed in claim 10, characterized in that, It further includes a battery pack mounted to the handle, wherein current from the battery pack powers the electric fastener driver.
14. The electric fastener driver assembly as claimed in claim 10, characterized in that, It further includes a spring that biases the lever toward the first position.
15. An extension rod assembly for power tools, characterized in that, The extension rod assembly includes: A carbon fiber mounting portion, the carbon fiber mounting portion including a first mounting portion and a second mounting portion, the second mounting portion being configured to pivot relative to the first mounting portion to at least partially enclose the power tool within the mounting portion; An extension rod having a first extension rod end and an opposite second extension rod end, the second extension rod end being coupled to the mounting portion; A handle, coupled to the end of the first extension rod, is gripped by the user of the power tool; and An actuator link extending between the ends of a first extension rod and a second extension rod, the actuator link including a lever pivotally coupled to the mounting portion, the lever being pivotable from a first position toward a second position to actuate the power tool.
16. The extension rod assembly as claimed in claim 15, characterized in that, It further includes a spring that biases the lever toward the first position.
17. The extension rod assembly as claimed in claim 15, characterized in that, The lever is a first lever, wherein the actuator link further includes a second lever adjacent to the handle, and wherein the second lever is pivotable between a non-actuated position corresponding to the first position of the first lever and an actuated position corresponding to the second position of the first lever.
18. The extension rod assembly as claimed in claim 17, characterized in that, The orientation of the second lever on the extension rod is adjustable about the longitudinal axis of the extension rod to adjust the orientation of the mounting portion relative to the user's hand without adjusting the orientation of the mounting portion relative to the extension rod.
19. The extension rod assembly as claimed in claim 18, characterized in that, It further includes a battery pack mounted to the extension rod, wherein current from the battery pack powers the power tool.
20. The extension rod assembly as claimed in claim 18, characterized in that, The handle includes a rubber shock absorber at the end of the handle opposite to the mounting portion.