Quick-change assembly for reaction arm power tool

Abstract

A reaction arm accessory for a power tool can include a body having a distal end configured to engage a fixed structure and a mounting end defining a wedge connection configured to engage a wedge interface of the power tool, the wedge interface containing a plurality of wedge teeth defining gaps between adjacent wedge teeth. The accessory can include a quick-release removal assembly supported in the body adjacent to the wedge connection and configured to selectively attach the reaction arm accessory to the wedge interface of the tool.The quick-change removal assembly may include a ring that is rotatable between a locked position and an unlocked position, the ring having a plurality of locking protrusions and a spring surrounding the ring configured to push the ring towards the locked position.

Description

Area

[0001] The present disclosure relates to reaction arm power tools, and in particular to accessories for reaction arm power tools. background

[0002] Reaction arm tools are a type of rotary power tool used to drive fasteners such as nuts and bolts, particularly in high-torque applications. Reaction arm tools incorporate a reaction arm attached to the tool's housing, which engages with a solid structure (e.g., an adjacent fastener in a bolt pattern). When torque is applied to a fastener, the reaction arm transfers the reaction torque to the solid structure, rather than to the user holding the tool. Summary

[0003] In some aspects, the techniques described herein relate to a reaction arm accessory for a power tool, wherein the reaction arm accessory comprises: a body with a distal end configured to engage a fixed structure and a mounting end defining a wedge connection configured to engage a wedge interface of the power tool, the wedge interface comprising a plurality of wedge teeth defining gaps between adjacent wedge teeth; and a quick-release removal assembly supported in the body adjacent to the wedge connection and configured to selectively attach the reaction arm accessory to the wedge interface of the tool, the quick-release removal assembly comprising a ring rotatable between a locked position and an unlocked position.wherein the ring includes a plurality of locking projections and a spring surrounding the ring and configured to push the ring towards the locked position, wherein each of the plurality of locking projections is configured to engage in a corresponding one of the plurality of wedge teeth when the ring is in the locked position to hold the reaction arm accessory axially on the power tool, and wherein each of the plurality of locking projections is aligned with a corresponding one of the gaps when the ring is in the unlocked position to allow the reaction arm accessory to be axially removed from the power tool.

[0004] In some aspects, the techniques described here refer to a reaction arm accessory in which each of the multitude of locking protrusions has a trapezoidal shape.

[0005] In some aspects, the techniques described here refer to a reaction arm accessory, where the spring is a torsion spring.

[0006] In some aspects, the techniques described here refer to a reaction arm accessory, the spring containing a first arm coupled to the body and a second arm coupled to the wreath.

[0007] In some aspects, the techniques described here refer to a reaction arm accessory where the mounting end of the body includes a lip that surrounds the wedge interface.

[0008] In some aspects, the techniques described here refer to a reaction arm accessory, wherein the ring contains an actuator that extends radially outwards from the ring.

[0009] In some aspects, the techniques described here refer to a reaction arm accessory, where the lip contains a slot and the actuator is accommodated in the slot.

[0010] In some aspects, the techniques described here refer to a reaction arm accessory in which the actuator rests against a first end of the slot when the ring is in the locked position, and rests against a second end of the slot opposite the first end when the ring is in the unlocked position.

[0011] In some aspects, the techniques described here refer to a reaction arm accessory, where the actuator includes a textured surface to facilitate handling of the actuator.

[0012] In some aspects, the techniques described here refer to a reaction arm accessory which further includes a ring that is received in a circumferential groove formed on an inside of the lip.

[0013] In some aspects, the techniques described here refer to a reaction arm accessory where the rim defines an outer diameter and where the ring defines an inner diameter that is smaller than the outer diameter, so that the ring holds the rim axially while allowing rotational movement of the rim.

[0014] In some aspects, the techniques described here refer to a reaction arm accessory where the ring is concentric with the rim.

[0015] In some aspects, the techniques described herein relate to a reaction arm accessory for a power tool, wherein the reaction arm accessory comprises: a body with a distal end configured to engage with a fixed structure and a mounting end configured to receive and engage a mounting interface of the power tool such that the body is rotationally fixed relative to the mounting interface of the power tool; and a quick-release removal assembly configured to selectively axially secure the body to the mounting interface of the power tool, wherein the quick-release removal assembly includes a ring rotatable between a locked position and an unlocked position, the ring comprising a locking projection configured to engage in a portion of the mounting interface.to prevent removal of the reaction arm accessory from the power tool along an axis when the rim is in the locked position, and wherein the locking projection is configured to disengage from the portion of the mounting interface when the rim is moved to the unlocked position to allow removal of the reaction arm accessory from the power tool along the axis, an actuator extending radially outward from the rim, and a torsion spring surrounding the rim and configured to force the rim toward the locked position.

[0016] In some aspects, the techniques described here refer to a reaction arm accessory where the locking projection has a trapezoidal shape.

[0017] In some aspects, the techniques described here refer to a reaction arm accessory, the spring containing a first arm coupled to the body and a second arm coupled to the wreath.

[0018] In some aspects, the techniques described here refer to a reaction arm accessory, where the actuator includes a textured surface to facilitate handling of the actuator.

[0019] In some aspects, the techniques described herein relate to a reaction arm accessory which further includes a ring, wherein the rim defines an outer diameter, wherein the ring defines an inner diameter which is smaller than the outer diameter, such that the ring axially restrains the rim while allowing rotational movement of the rim, and wherein the ring is concentric to the rim.

[0020] In some aspects, the techniques described here relate to a reaction arm accessory for a power tool, wherein the reaction arm accessory comprises: a body with a distal end configured to engage with a fixed structure, and a fastening end defining a wedge connection configured to engage with a wedge interface of the power tool;and a quick-release removal assembly mounted in the body adjacent to the wedge connection and configured to selectively attach the reaction arm accessory to the wedge interface of the power tool, the quick-release removal assembly comprising a pin slidably mounted in the body and movable between a locked position and an unlocked position, the pin having a shoulder and a spring configured to push the pin towards the locked position, the shoulder being configured to engage in a circumferential groove formed in the wedge interface of the power tool when the pin is in the locked position to axially hold the reaction arm accessory to the power tool.

[0021] In some aspects, the techniques described here relate to a reaction arm accessory, wherein the reaction arm accessory is removable from the power tool along an axis when the pin is in the locked position, and wherein the pin is movable between the locked position and the unlocked position in a direction perpendicular to the axis.

[0022] In some aspects, the techniques described here relate to a reaction arm accessory for a power tool, wherein the reaction arm accessory comprises: a body with a distal end configured to engage a fixed structure and a fastening end defining a wedge connection configured to engage a wedge interface of the power tool; and a quick-release removal assembly supported in the body adjacent to the wedge connection and configured to selectively secure the reaction arm accessory to the wedge interface of the tool, wherein the quick-release removal assembly includes a locking switch rotatably supported in the body and movable between a locked position and an unlocked position, the locking switch comprising a cam surface, a torsion spring with a first end coupled to the body,and a second end coupled to the locking switch, wherein the torsion spring is configured to force the locking switch into a locked position, a locking pin configured to secure the locking switch inside the body, and a locking pin slidably mounted inside the body, wherein the cam surface of the locking switch is configured to move the locking pin between a first position in which the locking pin is inside the wedge joint when the locking switch is in the locked position, and a second position in which the locking pin is outside the wedge joint when the locking pin is in the unlocked position.

[0023] In some aspects, the techniques described herein relate to a reaction arm accessory wherein an insertion axis extends through the wedge connection and is parallel to a drive axis of the power tool when the reaction arm accessory is coupled to the tool, the body includes a first opening configured to receive the locking switch and torsion spring, and the first opening defines a first receiving axis parallel to the insertion axis defined by the wedge connection.

[0024] In some aspects, the techniques described herein relate to a reaction arm accessory wherein the body contains a second opening connected to the first opening, the second opening defining a second receiving axis orthogonal to the first receiving axis, and the second opening being dimensioned to receive the locking pin along the second receiving axis such that the locking pin is configured to engage the detent switch to limit the movement of the detent switch along the first receiving axis.

[0025] In some aspects, the techniques described here relate to a reaction arm accessory wherein the body contains a third opening which is connected to the first opening and the wedge connection, and wherein the locking pin is slidably supported within the third opening.

[0026] In some aspects, the techniques described here relate to a reaction arm accessory, wherein the locking switch includes a circumferential groove and wherein the circumferential groove is aligned with the second opening so that the locking pin is received in the circumferential groove to secure the locking switch in the first opening.

[0027] In some aspects, the techniques described herein relate to a reaction arm accessory, wherein the cam surface of the locking switch comprises a convex part and a concave part which selectively engage the locking pin based on a rotational position of the locking switch, the locking pin moving out of the wedge joint and engaging in the concave part when the locking switch is in the unlocked position, and the locking pin engaging in the concave part when the locking switch is in the locked position to move the locking pin into the wedge joint.

[0028] In some aspects, the techniques described here refer to a reaction arm accessory, wherein the torsion spring has a first end coupled to the locking switch and a second end coupled to the body of the reaction arm accessory.

[0029] In some aspects, the techniques described herein relate to a reaction arm accessory wherein the cam surface comprises a first end and a second end that selectively engage the locking pin based on a rotational position of the locking switch, wherein the first end of the cam surface has a first radius and the second end of the cam surface has a second radius that is larger than the first radius, and the second end engages the locking pin when the locking switch is moved towards the locked position to move the locking pin within the wedge connection.

[0030] In some aspects, the techniques described herein relate to an extension configured to couple with a splined connection of a reaction-arm power tool, wherein the extension comprises: a housing with a first end defining a matching splined connection and a second end defining a second splined connection; an output mechanism rotatably supported in the housing, wherein the output mechanism is configured to engage with an output of the reaction-arm power tool;and a quick-change removal assembly is coupled to the first end of the housing to selectively secure the wedge connection of the reaction arm power tool, the quick-change removal assembly comprising a ring rotatably coupled to the housing, the ring having a plurality of locking areas and a cam-equipped engagement surface defining a raised portion and a recessed portion, a locking locking ball configured to engage in the engagement surface of the ring to selectively engage the locking ball through an opening formed in the housing with the matching wedge connection, and a preloading element arranged between the ring and the housing, the preloading element being configured to selectively engage in one of the locking areas to secure the ring in either a locked or unlocked position.

[0031] In some aspects, the techniques described here refer to an extension in which the wreath is configured to be rotated either clockwise or counterclockwise to move the wreath from the locked position to a first unlocked position or a second unlocked position.

[0032] In some aspects, the techniques described herein relate to an extension wherein the locked position, the first unlocked position and the second unlocked position are separated by a predetermined angle, and wherein the raised part of the cam-equipped engagement surface is shaped as a first arc which is smaller than the predetermined angle between the locked and unlocked positions.

[0033] In some aspects, the techniques described herein relate to a mounting interface for a reaction arm tool, wherein the mounting interface comprises: a housing with a first end configured to couple to the reaction arm tool and a second end opposite the first end, the housing defining a wedge interface configured to selectively receive a reaction arm accessory with a wedge connection; and a quick-release removal assembly coupled to the second end of the housing to selectively secure the wedge connection of the reaction arm accessory to the mounting interface, the quick-release removal assembly comprising a plate rotatably supported on the second end of the mounting interface, the plate having an interface associated with the first wedge interface, and a locking structure.which is supported on the second end of the mounting interface, wherein the locking structure is configured to support the plate at the second end of the mounting interface, wherein the plate is rotatable between an unlocked position in which the interface of the plate is aligned with the wedge interface so that the wedge connection of the reaction arm accessory can be axially displaced onto the wedge interface, and a locked position in which the interface of the plate is not aligned with the wedge interface in order to restrict the axial movement of the reaction arm accessory.

[0034] In some aspects, the techniques described here refer to a fastening interface, where the wedge interface is a first wedge interface and where the interface defines a second wedge interface that has an identical geometry to the first wedge interface.

[0035] In some aspects, the techniques described here refer to a fastening interface which further includes a preload element configured to selectively fasten the plate in a locked or unlocked position.

[0036] In some aspects, the techniques described here refer to a fastening interface which further includes a locking ball which is pressed by the preload element into engagement with a recess formed in the plate in order to secure the plate in the locked or unlocked position.

[0037] In some aspects, the techniques described herein refer to a fastening interface, wherein the interface contains a plurality of teeth separated by a valley, the recess is a first recess positioned near the teeth, a second recess is positioned near the valley, and the plate is fastened in the unlocked position when the locking ball engages in the first recesses, and the plate is fastened in the locked position when the locking ball engages in the second recess. Brief description of the illustrations Fig. Figure 1 is a side view of a power tool with a reaction arm according to an embodiment of the disclosure. Fig. Figure 2 is a perspective view of a reaction arm accessory showing a quick-change removal assembly in a locked position. Fig. Figure 3 is a perspective exploded view of part of the reaction arm accessory from Fig. 2, showing the quick-change removal assembly that has been removed from the reaction arm accessory. Fig. Figure 4 is a perspective view of part of the reaction arm accessory from Fig. 2, showing a quick-release removal assembly in an unlocked position. Fig. Figure 5 is a perspective view of the quick-change removal assembly of Fig. 2 in the locked position. Fig. Figure 6 is a perspective view of the quick-change removal assembly of Fig. 3 in the unlocked position. Fig. Figure 7 is a perspective exploded view of a reaction arm accessory incorporating a quick-change assembly according to another embodiment of the disclosure. Fig. Figure 8 is a perspective view of a locking switch of the quick-change removal assembly of Fig. 7. Fig. Figure 9 is a perspective view of the quick-change removal assembly of Fig. 7, which shows the quick-change removal assembly in a locked position. Fig. Figure 10 is a perspective view of the quick-change removal assembly of Fig. 7, which shows the quick-change removal assembly in an unlocked position. Fig. Figure 11 is a perspective view of a reaction arm accessory according to another embodiment of the disclosure. Fig. Figure 12 is a perspective view of a reaction arm accessory according to another embodiment of the disclosure. Fig. Figure 13 is a perspective view of a reaction arm accessory according to another embodiment of the disclosure. Fig. Figure 14 is a perspective view of a reaction arm accessory according to another embodiment of the disclosure. Fig. Figure 15 is a perspective view of an extension for a power tool which includes a quick-change assembly according to another embodiment of the disclosure. Fig. Figure 16 is a perspective cross-sectional view of an extension of Fig. 15. Fig. Figure 17 is a perspective exploded view of the extension of Fig. 15, which shows the quick-change assembly. Fig. Figure 18 is a perspective view of part of the extension of Fig. 15, which shows the quick-change assembly. Fig. Figure 19 is a perspective view of a ring of the quick-change assembly. Fig. 20 is a front view of the extension of Fig. 13, which shows the quick-change assembly in a first unlocked position. Fig. 21 is a front view of the extension of Fig. 13, which shows the quick-change assembly in a locked position. Fig. 22 is a front view of the extension of Fig. 13, which shows the quick-change assembly in a second unlocked position. Fig. Figure 23 is a perspective exploded view of a mounting interface of a power tool with a quick-change removal assembly and a reaction arm accessory. Fig. Figure 24 is a perspective cross-sectional view of the fastening interface of Fig. 23, which shows the quick-change removal assembly. Fig. Figure 25 is another perspective cross-sectional view of the fastening interface of Fig. 23, which shows a locking ball of the quick-change removal assembly. Fig. Figure 26 is a perspective rear view of a plate of the quick-change removal assembly. Fig. Figure 27 is a front view of the mounting interface with the reaction arm accessory, showing the quick-release removal assembly in an unlocked position. Fig. Figure 28 is a front view of the mounting interface with the reaction arm accessory, showing the quick-release removal assembly in a locked position. Fig. Figure 29 is a perspective view of the mounting interface of the power tool. Fig. 1. Fig. Figure 30 is a perspective view of a reaction arm accessory according to another embodiment of the disclosure. Fig. Figure 31 is a cross-sectional view of part of the reaction arm accessory from Fig. 30, which shows a quick-change removal assembly according to an embodiment of the disclosure. Fig. Figure 32 is another perspective view of the mounting interface of the power tool. Fig. 1. Fig. Figure 33 is a perspective view of a reaction arm accessory according to another embodiment of the disclosure. Fig. Figure 34 is a front view of the reaction arm accessory from Fig. 33, which shows a quick-change removal assembly in a first position. Fig. 35 Another front view of the reaction arm accessory from Fig. 33, which shows the quick-change removal assembly in a second position. Detailed description

[0038] Before the embodiments of the disclosure are explained in detail, it should be noted that the application of the disclosure is not limited to the design details and the arrangement of components listed in the following description or illustrated in the following figures. The disclosure can also be implemented or carried out in other embodiments and in various ways.

[0039] Fig. Figure 1 shows a power tool 10 in the form of a reaction arm tool – a rotating, direct-drive power tool configured to apply torque to a workpiece (e.g., a fastener) and featuring a reaction arm 12 that can brace the tool against a fixed structure (e.g., an adjacent fastener, a wall, a clamp, etc.) to absorb the reaction torque. Thus, the user operating the power tool 10 does not feel the reaction torque in their hands and wrists, resulting in higher torque output, repeatability, and reduced user fatigue.

[0040] The power tool 10 may be substantially similar to the power tool disclosed in International Publication No. PCT / US2023 / 027833 on behalf of Milwaukee Electric Tool Corporation, the entire contents of which are incorporated herein by reference. As in Fig. As shown in Figure 1, the power tool 10 comprises a housing 14 with a handle 18, a motor housing 22, and a battery receptacle 30 configured to hold a battery. In the illustrated embodiment, the battery receptacle 30 is located at a lower end or foot of the handle 18 opposite the motor housing 22. A motor 34 is supported in the motor housing 22 and coupled to a drive assembly (e.g., a multi-stage planetary gearbox). The motor 34 drives a drive assembly to provide an output torque at an output end or drive 38 of the power tool 10. The drive assembly provides an output torque at an output end or drive 38 of the power tool 10.

[0041] The tool 10 further includes a mounting interface 42, which is attached to the housing, and the output 38 extends from the housing 14 (e.g., through the mounting interface 42). The mounting interface 42 is rotationally fixed to the housing part 22 and includes a wedge interface 44 that engages in an associated wedge connection of a reaction arm accessory, which is described in more detail below. The mounting interface 42 further includes a plurality of circumferential recesses 46 formed in the wedge interface 44. As in Fig. As shown in Figure 29, the recesses 46 in the illustrated embodiment are formed in an outer surface of each outer wedge tooth of the wedge interface 44 between a first or rear end 45 and a second or front end 47 of the wedge interface 44. The recesses 46 are configured to receive a locking pin, ball, or projection for selectively securing the reaction arm 12 to the tool 10, as described in detail below.

[0042] The illustrated output 38 is configured as a square output with a substantially square cross-section, perpendicular to a drive axis 40. The output 38 is configured so that it can be connected to associated (i.e., square) drive tool bits, such as bushings (not shown). In other embodiments, the output 38 can have any other desired shape.

[0043] With reference to the Fig. Figures 2-6 describe a reaction arm accessory 112 (e.g., a spline arm) according to an embodiment of the disclosure. The reaction arm accessory 112 comprises a body 116 with a distal end 120a or tip and a fastening end 120b. The fastening end 120b is configured to couple with the fastening interface 42 of the power tool 10, such that the body 116 extends from the fastening interface 42 to the distal end 120a. The distal end 120a is configured to engage with a fixed structure (e.g., an adjacent fastener in a bolt pattern) so that the reaction arm accessory 112 transmits the reaction torque to the fixed structure and not to a user holding the tool.The illustrated reaction arm accessory 112 further includes a wedge connection 124 configured to engage the wedge interface 44 of the mounting interface 42, and a quick-change removal assembly 150 configured to selectively attach the reaction arm accessory 112 to the wedge interface 44. The quick-change removal assembly 150 is rotatably supported in the body 116 adjacent to the wedge connection 124. A mounting axis 130 extends centrally through the wedge connection 124 and is parallel to the drive axis 40 when the reaction arm accessory 112 is coupled to the tool 10.

[0044] In relation to Fig. Figure 3 of the reaction arm accessory 112 includes a first bore 154 formed in the body 116 of the accessory 112. The first bore 154 defines a first receiving axis 158, which runs parallel to the mounting axis 130 defined by the wedge connection 124. A second bore 162 is formed in the body 116 such that the second bore 162 communicates with the first bore 154. In the illustrated embodiment, the second bore 162 has a first part on a first side of the first bore 154 and a second part on a second side of the first bore 154. In other words, the second bore 162 extends through the first bore 154. The second bore 162 defines a second receiving axis 166, which runs orthogonally to the first receiving axis 158. A third bore 170 is defined in the body 116 such that the third bore 170 is connected to the first bore 154 and the wedge connection 124.

[0045] The quick-release removal assembly 150 includes a locking switch 174 rotatably mounted in the body 116, a torsion spring 178 configured to push the locking switch 174 into a locked position, a locking pin 182 configured to secure the locking switch 174 in the body 116, and a locking pin 186 mounted translationally in the body 116. The first bore 154 is dimensioned to accommodate the locking switch 174 and the torsion spring 178 along the first receiving axis 158. The second bore 162 is dimensioned to accommodate the locking pin 182 along the second receiving axis 166, such that the locking pin 182 is configured to engage the locking switch 174. The third bore 170 accommodates the locking pin 186.The locking pin 186 is movable between an unlocked position, in which the locking pin 186 is outside the wedge connection 124, and a locked position, in which the locking pin 186 extends inside the wedge connection 124. In the illustrated embodiment, the torsion spring 178 includes a first end 180a ( . Fig. 4), which is coupled to the locking switch 174, and a second end 180b, which is coupled to the body 116 of the reaction arm accessory 112. The torsion spring 178 pushes the locking switch 174 towards the locked position.

[0046] The quick-change removal assembly 150 is in the Fig. 2, Fig. 4, Fig. 5 and Fig. 6 in the locked position ( Fig. 2 and Fig. 5) and in the unlocked position ( Fig. 4 and Fig. 6) shown. As shown in the Fig. 5 and Fig. As shown in detail in Figure 6, the locking switch 174 includes a circumferential groove 190, a cam surface 194, and an opening 192 configured to receive the first end 180a of the torsion spring 178. The circumferential groove 190 is dimensioned to receive the locking pin 182 in order to limit the movement of the locking switch 174 along the first receiving axis 158. The cam surface 194 includes a convex part 196 and a concave part 198 that selectively engage with the locking pin 186, depending on the rotational position of the locking switch 274. The geometry of the cam surface 194 displaces the locking pin 186 within the third bore 170 in order to selectively move the locking pin 186 within the wedge connection 124 and to secure the arm 54 to the fastening interface 42. Fig. 1) In other words, the cam surface 194 of the locking switch 174 is configured to position the locking pin 186 between a first position in which the locking pin 186 is located within the wedge connection 124 when the locking switch 174 is in the locked position ( Fig. 2 and Fig. 5), and a second position in which the locking pin 186 is located outside the wedge connection 124 when the locking switch 174 is in the unlocked position ( Fig. 4 and Fig. 6), postpones.

[0047] The alignment of bores 154, 162, and 170 enables the quick-change removal assembly 150 to be mounted and dismounted from the body 116 of the reaction arm accessory 112. To mount the quick-change removal assembly 50, the locking pin 186 is inserted into the third bore 170. The torsion spring 178 and the locking switch 174 are then inserted into the first bore 154 along the first receiving axis 158 such that the circumferential groove 190 is aligned with the second bore 162 and the cam surface 194 is aligned with the locking pin 186 inserted in the third bore 170. The locking pin 182 is inserted in the second bore 162 along the second receiving axis 166 such that the locking pin 182 is received in the circumferential groove 190 to secure the locking switch 174 in the first bore 154.

[0048] To mount or dismount the reaction arm accessory 112 on the tool 10, the user rotates the locking switch 174 counterclockwise about the first mounting axis 158, thereby releasing the locking pin 186 from the wedge connection. Specifically, the cam surface 194 is moved such that the locking pin 186 is pushed out of the wedge connection and engages in the concave part 198. Once the reaction arm accessory 112 is mounted, the locking switch 174 is rotated clockwise by the force of the torsion spring 178. In particular, the convex part 196 engages in the locking pin 186 to displace the locking pin 186 within the wedge connection 124 and in conjunction with the recesses 46 formed in the wedge interface 44 of the tool 10, thereby securing the reaction arm accessory 112 to the fastening interface 42.

[0049] Fig. Figures 7-10 show a reaction arm accessory 212 (e.g., a wheel hub arm) with a quick-change removal assembly 250 according to another embodiment of the disclosure. The reaction arm accessory 212 is similar to the one shown in Fig. The reaction arm accessory 112 shown in Figures 2-6 and described above. Therefore, identical features are marked with the same reference numbers plus "100", and only the differences between the two are discussed.

[0050] The reaction arm accessory 212 comprises a body 216 with a distal end 220a and a mounting end 220b. The mounting end 220b is configured to couple with the mounting interface 42 of the power tool 10, such that the body 216 extends essentially in a kidney bean shape from the mounting interface 42 to the distal end 220a. The reaction arm accessory 212 further comprises a wedge connection 224 configured to engage the wedge interface 44 of the mounting interface 42, and a quick-release removal assembly 250 configured to selectively attach the reaction arm accessory 212 to the wedge interface 44. A fastening axis 230 extends centrally through the wedge connection 224 and is parallel to the drive axis 40 when the reaction arm accessory 212 is coupled to the tool 10.

[0051] With reference to Fig. 3 The reaction arm accessory 212 includes a first bore 254 formed in a lateral surface of the body 216 of the accessory 212. The first bore 254 defines a first receiving axis 258, which is parallel to the mounting axis 230 defined by the wedge connection 224. A second bore 262 is formed in a top surface of the body 216 such that the second bore 262 is connected to the first bore 254. The second bore 262 defines a second receiving axis 266, which is orthogonal to the first receiving axis 258. A third bore 270 is defined in the body 216 such that the third bore 270 is connected to the first bore 254 and the wedge connection 224.

[0052] The quick-change removal assembly 250 includes a locking switch 274, a torsion spring 278, a locking pin 282, and a locking pin 286. The first bore 254 is dimensioned to accommodate the locking switch 274 and the torsion spring 278 along the first receiving axis 258. The second bore 262 is dimensioned to accommodate the locking pin 282 along the second receiving axis 266, such that the locking pin 282 is configured to engage the locking switch 274. The third bore 270 accommodates the locking pin 286 and is movable between an unlocked position, in which the locking pin 286 does not extend into the wedge connection 224, and a locked position, in which the locking pin 286 extends into the wedge connection 224.In the illustrated embodiment, the torsion spring 278 comprises a first end 280a, which is coupled to the locking switch 274, and a second end 280b, which is coupled to the body 216 of the reaction arm accessory 212. The torsion spring 278 pushes the locking switch 274 toward the locked position.

[0053] With reference to Fig. The locking switch 274 includes a circumferential groove 290, a cam surface 294, and an opening configured to receive the first end 280a of the torsion spring 278. The circumferential groove 290 is dimensioned to receive the locking pin 282 to limit the movement of the locking switch 274 along the first receiving axis 258. The cam surface 294 includes a first end 296 and a second end 298 that selectively engage the locking pin 286, depending on the rotational position of the locking switch 274. The geometry of the cam surface 294 allows the locking pin 286 to move selectively within the wedge connection 224 to secure the arm 54 to the fastening interface 42. Fig. 1) For example, if the first end 296 of the cam surface 294 has a first radius and the second end 298 of the cam surface 294 has a second radius that is larger than the first radius. In other words, the second end 298 has a smaller distance than the first end 296, so that the second end engages in the locking pin 286 when the locking switch 274 is moved towards the locked position to displace the locking pin 286 within the wedge connection 224.

[0054] In the Fig. 9 and Fig. 10 is the quick-change removal assembly 250 in locked ( Fig. 9) and unlocked position ( Fig. 10) shown. To mount or dismount the reaction arm accessory 212 in the tool 10, the user rotates the locking switch 274 counterclockwise about the first mounting axis 258. This releases the locking pin 286 by moving the cam surface 294, so that the locking pin 182 engages in the first end 296 of the cam surface 294. Once the reaction arm accessory 212 is mounted, the locking switch 274 is rotated clockwise by the force of the torsion spring 278. In particular, the second end 298 of the cam surface 294 engages in the locking pin 286 to displace the locking pin 286 within the wedge connection 224 and in conjunction with the circumferential recesses 46 formed in the wedge interface 44 of the tool, thereby securing the reaction arm accessory 112 to the fastening interface 42.

[0055] Fig. Figures 11-14 illustrate reaction arm accessories 312, 412, 512, 612 according to other embodiments of the disclosure. The reaction arm accessories 312, 412, 512, 612 have different geometries than the reaction arm accessories 112, 212 disclosed above, but are used in a similar manner to those in Fig. The reaction arm accessories 112 shown in Figures 2-10 and described above are therefore identical features with the same reference numbers plus "100", and only the differences between the accessories are discussed. The quick-change removal assemblies 150 and 250 can be used with any of the example reaction arm accessories or with other reaction arm accessories.

[0056] For example, reaction arm accessory 312 is a small spline arm. Reaction arm accessory 412 is a large spline arm. Reaction arm accessory 512 is a deep-hole drilling arm. Reaction arm accessory 612 is a straight arm. Reaction arm accessories 312, 412, 512, and 612 can be directly coupled to the mounting interface 42 of tool 10 or with an extension, which is described in more detail below.

[0057] Fig. Figures 15-22 show an extension 712 containing a housing 716 having a first end with a matching wedge connection 720 and a second end with a second wedge connection 724. A quick-change removal assembly 728 is coupled to the first end of the housing 716 to selectively engage the matching wedge connection 720 with the wedge interface 44 of the tool 10.

[0058] The extension 712 contains an output mechanism 732 ( Fig. 16), which is rotatably supported in the housing 716 and is configured to mesh with the output 38 of the tool 10. The output mechanism 732 includes a bushing 736 configured to couple with the output 38 of the tool and a second output 740. In the illustrated embodiment, the bushing 736 has a substantially square cross-section, and the second output 740 also has a square cross-section. As such, the second output 740 is configured for attachment to associated (i.e., square) drive tool bits, such as bushings (not shown). In other embodiments, the second output can have any other desired shape. As in Fig. 16 and Fig. As shown in Figure 17, a locking element 742 (e.g. a ring, a clamp or similar) is coupled to the housing 716 and configured to secure the drive mechanism 732 in the housing 716.

[0059] Referring to the Fig. Figures 17-19 include the quick-change removal assembly 728, comprising a ring 746 rotatably coupled to the housing 716, a locking ball 750 which moves selectively through an opening 754 formed in the housing 716 in conjunction with the matching wedge connection 720, a preload element 758 arranged between the ring 746 and the housing 716, and a fastening element 762 (e.g., a retaining ring, a clamp, or the like). An inner surface of the ring 746 includes a plurality of locking areas 766, 768, 770 ( Fig. 19), configured to selectively receive the preloading element 758 to secure the ring 746 in either a locked or unlocked position, and a cam-equipped engagement surface 774 configured to engage with the locking locking ball 750.

[0060] In the illustrated embodiment, the preload element 758 is a leaf spring coupled to the housing 716. In other embodiments, other elements such as torsion springs, compression springs, or the like may be used. The combination of the preload element 758 and the locking areas 766, 768, 770 restricts the movement of the ring 746 to a predetermined range and ensures distinct locked and unlocked positions for the ring 746. In particular, the locked and unlocked positions are separated by a predetermined angle. In the illustrated embodiment, the ring 746 has a range of movement of 120 degrees, and the predetermined angle between the individual positions is 60 degrees. In other embodiments, the predetermined angle may be less than 60 degrees or greater than 60 degrees. For example, the ring 746 is configured to move either clockwise from the locked position ( Fig. 21) into a first unlocked position ( Fig. 20) or counterclockwise from the locked position to a second unlocked position ( Fig. 22) turns.

[0061] The cam-equipped engagement surface 774 comprises a first, raised portion 778 and a second, recessed portion 782. In the illustrated embodiment, the first raised portion 778 is formed as a first arc of the cam-equipped engagement surface 774, and the second, recessed portion 782 is formed as a second arc of the cam-equipped engagement surface 774. In other words, the first, raised portion 778 of the cam-equipped engagement surface 774 corresponds to the locked position of the ring 746, while the second, recessed portion 782 corresponds to the unlocked position of the ring 746. The first arc is smaller than the predetermined angle between the locked and unlocked positions. In the illustrated embodiment, the first arc is less than 60 degrees of the ring's circumference.

[0062] In the Fig. Figures 20-22 illustrate the operation of the quick-change removal assembly 728. Fig. Figure 21 shows, for example, the wreath 746 in the locked position, Fig. Figure 20 shows the wreath 746 in the first unlocked position and Fig. Figure 22 shows the wreath 746 in the second unlocked position ( Fig. 22). In the locked position, the raised part 778 of the engagement surface 774 engages in the locking ball 750 to engage a part of the locking ball 750 in the wedge connection 720 and in conjunction with the circumferential recess 46 formed in the wedge interface 44 of the tool 10 ( Fig. 1) to move, which secures the extension 712 to the fastening interface 42. At the same time, the preloading element 758 engages in a first locking area 766 ( Fig. 20) to secure the wreath 746 in the locked position.

[0063] To remove the extension 712 from the tool 10, the ring 746 can be rotated either clockwise or counterclockwise to release the ring 746 from the locked position ( Fig. 21) into the first unlocked position ( Fig. 20) or the second unlocked position ( Fig. 22) to move. When the ring 746 is rotated clockwise towards the first unlocked position, the preloading element 758 is compressed and no longer engages in the first locking area 766. At the same time, the locking locking ball 750 moves out of engagement with the raised part 778 of the engagement surface 774 and engages in the recessed part 782, allowing the locking locking ball 750 to be pushed out of the wedge connection 720. Once the ring 746 has reached the first unlocked position, the preloading element 758 engages in a second locking area 768 ( Fig. 19), to secure the wreath 746 in the first unlocked position, thereby allowing the extension 712 to be removed from the tool 10.

[0064] If the ring 746 rotates counterclockwise from the locked position ( Fig. 21) into the second unlocked position ( Fig. 22) is rotated, the preload element 758 is compressed and moves out of engagement with the first locking area 766. Simultaneously, the locking locking ball 750 moves out of engagement with the raised part 778 of the engagement surface 774 and engages in the recessed part 782, thereby allowing the locking locking ball 750 to be pushed out of the wedge connection 720. Once the ring has reached the second unlocked position, the preload element 758 engages in a third locking area 770 ( Fig. 19) to secure the wreath 746 in the second unlocked position, thereby allowing the extension 712 to be removed from the tool 10.

[0065] Fig. Figures 23-27 show a reaction arm accessory 912 (e.g., a spline arm) configured to couple with a mounting interface 842, which includes a quick-change removal assembly 950 according to another embodiment of the disclosure. The reaction arm accessory 912 is similar to the one shown in Fig. 2-6 shown reaction arm accessory 112 and the one in Fig. The mounting interface 42 shown in Figure 1 is described above. Unlike the reaction arm accessory 112, the quick-release removal assembly 950 is not coupled to the reaction arm accessory 912, but rather to the mounting interface 842. Therefore, identical features are identified by the same reference numbers plus "800", and only the differences between the two are discussed.

[0066] The reaction arm accessory 912 comprises a body 916 with a distal end 920a or tip and a fastening end 920b. The fastening end 920b is configured to engage with the fastening interface 842 of the power tool, such that the body 916 extends from the fastening interface 842 to the distal end 920a. The distal end 920a is configured to engage with a fixed structure (e.g., an adjacent fastener in a stud pattern) so that the reaction arm accessory 912 transfers the reaction torque to the fixed structure and not to a user holding the tool. The illustrated reaction arm accessory 912 further comprises a wedge connection 924 configured to engage with a first wedge interface 844 of the fastening interface 842.A fastening axis 930 extends centrally through the wedge connection 924 and is parallel to a drive axis 840 of the fastening interface 842 when the reaction arm accessory 912 is coupled to the tool.

[0067] The mounting interface 842 includes a housing 843 with a first end 845 coupled to the tool and a second end 847 opposite the first end 845. The first wedge interface 844 extends at least partially between the first end 845 and the second end 847. The second end 847 defines a recess 851 configured to receive the quick-change removal assembly 950, which is configured to selectively mount the reaction arm accessory 912 to the first wedge interface 844. The quick-change removal assembly 150 includes a plate 953 rotatably supported on the second end 847 of the fastening interface 844, a locking structure 957 (e.g. a spiral ring) supported on the second end 847 of the fastening interface 844, and one or more preload elements 961 that selectively secure the plate 953 in a locked or unlocked position.In the illustrated embodiment, the plate 953 and the locking structure 957 are attached in the recess 851 of the housing 843 at the second end 847. The preload element(s) 961 contains four compression springs spaced circumferentially at the second end 847 of the mounting interface. In other embodiments, the preload element(s) may contain more (e.g., five, six, etc.) or fewer (e.g., three, two, one) compression springs.

[0068] With reference to the Fig. 25 and Fig. 26 The plate 953 contains an interface 965, which is assigned to the first wedge interface 844. The interface is rotatable between an unlocked position ( Fig. 27) and a locked position ( Fig. 28). In the illustrated embodiment, the interface 965 defines a second wedge interface which has an identical geometry to the wedge interface 844. In particular, the interface 965 includes a plurality of teeth 969 ( Fig. 26), which pass through valleys 971 ( Fig. 26) are separated from each other. In other embodiments, the plate 953 can have a different geometry than the wedge interface 844. For example, the interface 965 can have any geometry that does not engage with the wedge interface 844 when the plate 953 is positioned in the unlocked position ( Fig. 26).

[0069] The quick-change removal assembly 950 also includes a locking ball 963 ( Fig. 25), which is caused by the prestressing element 961 ( Fig. 25) is pressed into engagement with a recess 967a, 967b formed on the plate 953. In the illustrated embodiment, the plate 953 includes a first set of recesses 967a arranged circumferentially around the plate 953 at a position associated with the teeth 969 (e.g., near the teeth 969), and a second set of recesses 967b arranged circumferentially around the plate 953 at a position associated with the valleys 971 of the plate 953 (e.g., near the valley 971). The locking ball 963 selectively engages in one of the recesses 967a, 967b to hold the ring either in the unlocked position ( Fig. 27) or in the locked position ( Fig. 28) to fasten. For example, when the locking ball 963 engages in one of the sets 967a, the plate 953 is fastened in the unlocked position, and when the locking ball 963 engages in one of the sets 967b, the plate 953 is fastened in the locked position.

[0070] In the Fig. 27 and Fig. Figure 28 shows the movement of the quick-change removal assembly 950 between the locked and unlocked positions. In the unlocked position, the interface 965 is aligned with the wedge interface 844 of the mounting interface 842, so that the wedge connection 924 of the reaction arm accessory 912 moves axially along the drive axis 840 ( Fig. 24) can be moved. At the same time, the locking ball 963 engages ( Fig. 25) into one of the first set of recesses 967a to secure the plate 953 in the unlocked position. Once the reaction arm accessory 912 is coupled to the mounting interface 842, the plate 953 is rotated into the locked position ( Fig. 26), in which the interface 965 is not aligned with the first wedge interface 844. When the plate 953 is rotated, the detent locking ball 963 moves out of engagement with the recesses 967a and engages in one of the second set of recesses 967b to secure the plate 953 in the locked position. A displacement of the interface 965 relative to the first wedge interface 844 restricts the axial movement of the reaction arm accessory 912 along the drive axis 840, thereby securing the reaction arm accessory 912 to the mounting interface 842. To remove the reaction arm accessory 912 from the mounting interface 842, the plate 953 is rotated into the unlocked position ( Fig. 25), in which the interface 965 is aligned with the first wedge interface 844. The reaction arm accessory 912 can then be moved along the drive axis 840 to remove the reaction arm accessory from the mounting interface 842.

[0071] The Fig. Figures 30-31 show a reaction arm accessory 1112 (e.g., a spline arm) according to another embodiment of the disclosure. The reaction arm accessory 1112 is similar to the one shown in the Fig. 2-6 shown and described above, reaction arm accessory 112. Therefore, identical features are marked with the same reference numbers plus "1000", and only the differences between the two are discussed.

[0072] The reaction arm accessory 1112 comprises a body 1116 with a distal end 1120a and a mounting end 1120b. The mounting end 1120b is configured to connect to the mounting interface 42 ( Fig. 29) of the power tool 10. The illustrated reaction arm accessory 1112 further includes a wedge connection 1124 (e.g. a ring with internal wedges) configured to engage in the wedge interface 44 of the mounting interface 42 ( Fig. 29) engages, and a quick-change removal assembly 1150 is configured to selectively axially secure the reaction arm accessory 1112 to the wedge interface 44 of the tool 10. A mounting axis 1130 extends centrally through the wedge connection 1124. The mounting axis 1130 can be coaxial with the drive axis 40 when the reaction arm accessory 1112 is coupled to the tool 10.

[0073] Referring to Fig. Figure 31 shows that the reaction arm accessory 1112 includes a bore 1162 formed in a side face of the body 1116 of the accessory 1112. The bore 1162 defines an axis 1166 which, in the illustrated embodiment, is orthogonal to the mounting axis 1130 and tangential to the wedge connection 1124. A pin 1186 is received in the bore 1162. The pin 1186 includes a head 1187 with a larger diameter than the rest of the pin 1186. The pin 1186 also includes a first groove 1189 and a second groove 1191 spaced apart along the axis 1166. A retaining pin 1193 extends through the body 1116 of the accessory 1112 parallel to the mounting axis 1130 and orthogonal to the axis 1166. The retaining pin 1193 extends through the first groove 1189 so that the ends of the first groove 1189 can each engage in the retaining pin 1193 to limit the translational movement of the pin 1186 along the axis 1166.

[0074] With further reference to Fig. 31 The pin 1186 contains a shoulder 1195 that defines an end of the second groove 1191, which is furthest from the head 1187. In the locked position of the pin 1186, as in Fig. As shown in Figure 31, the shoulder 1195 extends into a gap 1197 defined between two adjacent teeth of the wedge connection 1124. The pin 1186 is located along the axis 1166 in an unlocking direction (in Fig. 31 to the right) into an unlocked position (not shown) in which the shoulder 1195 is received in the bore 1162, so that the shoulder 1195 does not protrude into the gap 1197. The pin 1186 is biased towards the locked position by a spring 1199 (e.g. a coil spring) located between the pin 1186 and one end of the bore 1162.

[0075] To attach the reaction arm accessory 1112 to the power tool 10, a user can press on the head 1187 of the pin 1186 to move the pin 1186 against the force of the spring 1199 into the unlocked position. In the unlocked position of the pin 1186, the wedge connection 1124 can be positioned over the wedge interface 44 of the tool 10 until the pin 1186 is substantially aligned with the circumferential recesses 46 in one direction along the axes 40, 1130. The user can then release the pin 1186. When the pin 1186 is released, it moves under the influence of the spring 1199 into the Fig. Figure 31 shows the locked position. In the locked position, the shoulder 1195 extends into the slot 1197 and into one of the multiple circumferential recesses 46. The engagement between the shoulder 1195 and the side wall of the recess 46 holds the reaction arm accessory 1112 axially to the power tool 10. To remove the reaction arm accessory 1112, the user presses down on the head 1187 of the pin 1186 to pull the shoulder 1195 out of the recess 46 and the slot 1197.

[0076] The Fig. Figures 32-35 show a reaction arm accessory 1212 (e.g., a spline arm) according to another embodiment of the disclosure. The reaction arm accessory 1212 is similar to the one shown in Fig. The reaction arm accessory 112 shown in Figures 2-6 and described above. Therefore, identical features are marked with the same reference numbers plus "1100", and only the differences between the two are discussed.

[0077] The reaction arm accessory 1212 comprises a body 1216 with a distal end 1220a and a mounting end 1220b. The mounting end 1220b is configured to connect to the mounting interface 42 ( Fig. 29 and Fig. 32) of the power tool 10 can be coupled. In some embodiments, the body 1216 may include a central rib or ridge with a greater thickness than the rest of the body 1216 in order to increase the stiffness of the body 1216.

[0078] The illustrated reaction arm accessory 1212 further includes a wedge connection 1224 (e.g. a ring with internal wedges) configured to engage in the wedge interface 44 of the mounting interface 42 ( Fig. 29 and Fig. 32) engages, as well as a quick-change removal assembly 1250 configured to selectively secure the reaction arm accessory 1212 axially to the wedge interface 44 of the tool 10. A mounting axis 1230 extends centrally through the wedge connection 1224. The mounting axis 1230 can be coaxial with the drive axis 40 when the reaction arm accessory 1212 is coupled to the tool 10. The reaction arm accessory 1212 includes a lip 1232 extending from the mounting end 1220b in a direction parallel to the mounting axis 1230 and surrounding the wedge connection 1224. The lip 1232 is essentially circular but includes a gap or slot 1233 that interrupts the continuity of the lip 1232.

[0079] With reference to Fig. 33-35 The quick-change removal assembly 1250 includes a locking ring 1238 positioned on the reaction arm accessory 1212, a ring 1240 and a spring 1242 ( Fig. 33). The locking ring 1238 shown forms a closed ring shape and includes a plurality of locking projections 1244 arranged annularly around an inner circumference of the locking ring 1238. In the illustrated embodiment, the locking projections 1244 are trapezoidal, but in other embodiments they may have other shapes. An actuator 1246 extends radially outward from an outer circumference of the locking ring 1238 and is configured to move within the slot 1233 of the lip 1232 between an unlocked position ( Fig. 35) and a locked position ( Fig. 34) moves. In the illustrated embodiment, the actuator 1246 rests against a first end of the slot 1233 when the locking ring 1238 is in the locked position, and the actuator 1246 rests against a second, opposite end of the slot 1233 when the locking ring 1238 is in the unlocked position. In the illustrated embodiment, the actuator 1246 includes a structured surface (e.g., ribs) to facilitate handling of the actuator 1246.

[0080] With reference to Fig. 33 The ring 1240 can be a snap fastener, a washer, or the like, and is shaped and dimensioned to fit into a circumferential groove 1235 formed on an inner side of the lip 1232. The illustrated ring 1240 has an inner diameter that is smaller than the outer diameter of the locking ring 1238. As such, the ring 1240 axially secures the locking ring 1238 while allowing rotational movement of the locking ring 1238 relative to the reaction arm accessory 1212. In the illustrated embodiment, the ring 1240 is concentric with the locking ring 1238. In some embodiments, the ring 1240 can bear against an end face of the locking ring 1238 to axially secure the locking ring 1238. In other embodiments, one or more intermediate components (e.g. a low-friction washer) can be positioned between the ring 1240 and the locking ring 1238.

[0081] With further reference to Fig. In Figure 33, the illustrated spring 1242 is a torsion spring that biases the locking ring 1238 toward the locked position. Specifically, the spring 1242 exerts a force that causes the locking projections 1244 to engage in the recesses 46 of the mounting interface 42. In the illustrated embodiment, the spring 1242 forms a ring and surrounds the locking ring 1238. The illustrated spring 1242 includes a first arm 1259, which is received in a correspondingly shaped recess in the lip 1232 to secure the first arm 1259 to the body 1216 of the reaction arm accessory 1212. A second arm (not shown) of the spring 1242 is coupled to the locking ring 1238. The second arm can, for example, be received in a slot formed in the actuator 1246. The second arm separates from the first arm 1259 when the locking ring 1238 is moved into the unlocked position.In this process, the spring 1242 is deformed, generating a torsional preload force that returns the locking ring 1238 to the locked position. Other embodiments may use different spring types and geometries to preload the locking ring 1238 towards the locked position.

[0082] When the actuator 1246 is in the unlocked position ( Fig. 35), are the locking projections 1244 with columns G ( Fig. 32) between the adjacent wedges of the wedge interface 44, allowing the reaction arm accessory 1212 to slide along the mounting interface 42 to be attached to the power tool 10. Once the reaction arm accessory 1212 is positioned on the mounting interface 42, the actuator 1246 of the locking ring 1238 can be actuated (e.g., under the influence of the spring 1242) to move the locking ring 1238 from the unlocked position to the locked position. Specifically, the actuator 1246 moves along the slot 1233 in a first direction of rotation (e.g., clockwise).

[0083] In the locked position ( Fig.34) Each of the locking projections 1244 rotates into a corresponding recess 46 on the wedge interface 44. When the locking projections 1244 engage the front walls 46a of the recesses 46, the reaction arm accessory 1212 is axially secured and cannot be removed from the power tool 10. In other embodiments, the locking projections 1244 may instead engage in the rear end 45 of the wedge interface 44 (i.e., the rear ends of the wedge teeth of the wedge interface 44) when in the locked position. The spring 1242 continuously pushes the locking ring 1238 toward the locked position, thus ensuring that the locking ring 1238 remains engaged during use.

[0084] To remove the reaction arm accessory 1212, the actuator 1246 is rotated in a second direction (e.g., counterclockwise) against the preload force of the spring 1242, thereby aligning the locking projections 1244 with the wedge teeth 1224a of the wedge interface 1224 (and thus with the gaps G between the wedge teeth of the wedge interface 44 of the power tool 10). This allows the reaction arm accessory 1212 to be pushed from the mounting interface 42 towards the mounting axis 1230.

[0085] Although the disclosure has been described in detail with reference to certain preferred embodiments, variations and modifications exist within the scope and nature of one or more independent aspects of the disclosure as described.

[0086] Various features and aspects of the present disclosure are set forth in the following claims. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] US 2023 / 027833

[0040]

Claims

[1] A reaction arm accessory for a power tool, the reaction arm accessory comprising: a body with a distal end configured to engage with a fixed structure and a fastening end defining a wedge connection configured to engage with a wedge interface of the power tool, the wedge interface containing a plurality of wedge teeth defining gaps between adjacent wedge teeth; and a quick-change removal assembly that is held in the body adjacent to the wedge connection and is configured to selectively attach the reaction arm accessory to the wedge interface of the tool, wherein the quick-change removal assembly includes a ring rotatable between a locked position and an unlocked position, the ring comprising a plurality of locking projections, and a spring that surrounds the rim and is configured to push the rim towards the locked position, wherein each of the multiple locking projections is configured to engage in a corresponding multiple of the multiple wedge teeth when the ring is in the locked position to hold the reaction arm accessory axially to the power tool, and wherein each of the multiple locking projections is aligned with a corresponding one in the gap when the ring is in the unlocked position to allow the reaction arm accessory to be axially removed from the power tool. [2] The reaction arm accessory according to claim 1, wherein each of the plurality of locking projections has a trapezoidal shape. [3] The reaction arm accessory according to claim 1 or 2, wherein the spring is a torsion spring. [4] The reaction arm accessory according to one of the preceding claims, wherein the spring comprises a first arm coupled to the body and a second arm coupled to the ring. [5] The reaction arm accessory according to any of the preceding claims, wherein the fastening end of the body includes a lip surrounding the wedge interface. [6] The reaction arm accessory according to claim 5, wherein the ring contains an actuator extending radially outwards from the ring. [7] The reaction arm accessory according to claim 6, wherein the lip includes a slot and wherein the actuator is received in the slot. [8] The reaction arm accessory according to claim 7, wherein the actuator rests against a first end of the slot when the ring is in the locked position, and rests against a second end of the slot opposite the first end when the ring is in the unlocked position. [9] The reaction arm accessory according to one of claims 6-8, wherein the actuator has a structured surface to facilitate handling of the actuator. [10] The reaction arm accessory according to one of claims 5-9, further comprising a ring which is received in a circumferential groove formed on an inside of the lip. [11] The reaction arm accessory according to claim 10, wherein the rim defines an outer diameter and wherein the ring defines an inner diameter which is smaller than the outer diameter, such that the ring holds the rim axially while allowing rotation of the rim. [12] The reaction arm accessory according to claim 10 or 11, wherein the ring is concentric to the wreath. [13] A reaction arm accessory for a power tool, the reaction arm accessory comprising: a body with a distal end configured to engage with a fixed structure and a mounting end configured to receive and engage with a mounting interface of the power tool, such that the body is rotationally fixed relative to the mounting interface of the power tool; and a quick-change removal assembly configured to selectively axially secure the body to the tool's mounting interface, wherein the quick-change removal assembly includes: a ring rotatable between a locked position and an unlocked position, wherein the ring includes a locking projection configured to engage in a portion of the mounting interface to prevent the reaction arm accessory from being removed from the power tool along an axis when the ring is in the locked position, and wherein the locking projection is configured to move out of engagement with the portion of the mounting interface when the ring is moved into the unlocked position to allow removal of the reaction arm accessory from the power tool along the axis. an actuator extending radially outwards from the rim, and a torsion spring surrounding the rim and configured to push the rim towards the locked position. [14] The reaction arm accessory according to claim 13, wherein the locking projection has a trapezoidal shape. [15] The reaction arm accessory according to claim 13 or 14, wherein the spring comprises a first arm coupled to the body and a second arm coupled to the ring. [16] The reaction arm accessory according to one of claims 13-15, wherein the actuator includes a structured surface to facilitate handling of the actuator. [17] The reaction arm accessory according to one of claims 13-16, further comprising a ring, wherein the rim defines an outer diameter, wherein the ring defines an inner diameter which is smaller than the outer diameter, so that the ring holds the rim axially while allowing rotation of the rim, and wherein the ring is concentric to the rim. [18] A reaction arm accessory for a power tool, the reaction arm accessory comprising: a body with a distal end configured to engage in a fixed structure and a fastening end defining a wedge connection configured to engage in a wedge interface of the power tool; and a quick-release removal assembly supported in the body adjacent to the wedge connection and configured to selectively fasten the reaction arm accessory to the wedge interface of the tool, the quick-release removal assembly comprising a pin which is slidably supported in the body and movable between a locked position and an unlocked position, wherein the pin has a shoulder, and a spring configured to push the pin towards the locked position, the shoulder being configured to engage in a circumferential groove formed in the wedge interface of the power tool when the pin is in the locked position to hold the reaction arm accessory axially on the power tool. [19] The reaction arm accessory according to claim 18, wherein the reaction arm accessory is removable from the power tool along an axis when the pin is in the locked position, and wherein the pin is movable between the locked position and the unlocked position in a direction perpendicular to the axis.

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