WO2025189384A1 - Système et procédé de détection de désaccouplement d'embrayage - Google Patents

Système et procédé de détection de désaccouplement d'embrayage

Info

Publication number
WO2025189384A1
WO2025189384A1 PCT/CN2024/081380 CN2024081380W WO2025189384A1 WO 2025189384 A1 WO2025189384 A1 WO 2025189384A1 CN 2024081380 W CN2024081380 W CN 2024081380W WO 2025189384 A1 WO2025189384 A1 WO 2025189384A1
Authority
WO
WIPO (PCT)
Prior art keywords
arm
clutch
hall effect
effect sensor
flange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/081380
Other languages
English (en)
Inventor
Henglian LUO
Bin Sun
Jiangming HE
Xiongqun CHEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Apex Brands Inc
Original Assignee
Apex Brands Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Apex Brands Inc filed Critical Apex Brands Inc
Priority to PCT/CN2024/081380 priority Critical patent/WO2025189384A1/fr
Publication of WO2025189384A1 publication Critical patent/WO2025189384A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/141—Mechanical overload release couplings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers

Definitions

  • Example embodiments generally relate to power tools, and, in particular, relate to improvements for a handheld fastening tool.
  • Fastening tools are commonly used in both commercial and private settings to tighten fasteners of various types for various purposes. Often referred to as nutrunners and screwdrivers, fastening tools may often be employed in an assembly or disassembly setting. In an example setting, a plurality of different operators may simultaneously be operating individual fastening tools to tighten various fasteners. In some cases, the plurality of different operators may be working on the same step on an assembly line of an object, but in some other cases, the plurality of different operators may be working on various different tasks. In this regard, the various different tasks may require the fasteners to be tightened to different torque ratings depending on the particular task. As such, the fastening tool may be operated differently depending on the desired use case.
  • the current state of clutch disengagement signal detection is such that the corresponding components are subject to mechanical wear, which may greatly reduce the usable lifespan of these components.
  • the fastening tool may not detect the clutch disengagement due to a component failure.
  • creating a fastening tool that can detect the clutch disengagement signal without significant mechanical wear on such components may reduce the likelihood of incurring error with detecting the clutch disengagement signal, and may improve the operational longevity of the tool and its components.
  • Some example embodiments may provide for a clutch disengagement detection system for a fastening tool.
  • the system may include a clutch which may operably couple a drive assembly to an output spindle, the clutch may be configured to alternatingly rotationally engage and disengage the output spindle and the drive assembly based on an output torque and a predetermined torque threshold, a flange which may be operably coupled to the clutch, the flange may be displaceable along a rotational axis of the output spindle and the drive assembly, an arm which may be operably coupled to the flange, the arm may be displaceable along an arm axis responsive to the flange being displaced along the rotational axis, a magnet which may be disposed at a fixed location on the arm, a Hall effect sensor which may be disposed proximate to the arm such that as the arm may be displaced, the magnet may move relative to the Hall effect sensor, and processing circuitry which may be operably coupled to the Hall effect sensor and may be configured to convert an analog signal from the Hall
  • the fastening tool may include a housing, a motor which may be disposed within the housing and may be configured to generate an output torque, a power source which may be configured to supply power to the motor, a trigger which may be configured to control a rotational velocity of the motor, an output spindle which may be configured to operably couple with a fastener at a first end of the output spindle, a drive assembly which may be operably coupled to the motor and to a second end of the output spindle to transmit the output torque to the output spindle, and a clutch disengagement detection system.
  • the clutch disengagement detection system may include a clutch which may operably couple the drive assembly to the output spindle, the clutch may be configured to alternatingly rotationally engage and disengage the output spindle and the drive assembly based on an output torque and a predetermined torque threshold, a flange which may be operably coupled to the clutch, the flange may be displaceable along a rotational axis of the output spindle and the drive assembly, an arm which may be operably coupled to the flange, the arm may be displaceable along an arm axis responsive to the flange being displaced along the rotational axis, a magnet which may be disposed at a fixed location on the arm, a Hall effect sensor which may be disposed proximate to the arm such that as the arm may be displaced, the magnet may move relative to the Hall effect sensor, and processing circuitry which may be operably coupled to the Hall effect sensor and may be configured to convert an analog signal from the Hall effect sensor into a clutch disengagement signal in digital form.
  • the processing circuitry may use
  • the tool may include a clutch which may operably couple a drive assembly to an output spindle, the clutch may be configured to alternatingly rotationally engage and disengage the output spindle and the drive assembly based on an output torque and a predetermined torque threshold, a flange which may be operably coupled to the clutch, the flange may be displaceable along a rotational axis of the output spindle and the drive assembly, an arm which may be operably coupled to the flange, the arm may be displaceable along an arm axis responsive to the flange being displaced along the rotational axis, a magnet which may be disposed at a fixed location on the arm, a Hall effect sensor which may be disposed proximate to the arm such that as the arm may be displaced, the magnet may move relative to the Hall effect sensor, and processing circuitry which may be operably coupled to the Hall effect sensor and may be configured to convert an analog signal from the Hall effect
  • the method may include recording an analog signal from the magnet using the Hall effect sensor, converting the analog signal into a clutch disengagement signal in digital form via a logic circuit, and determining when the clutch disengages the drive assembly and the output spindle using the clutch disengagement signal and the logic circuit.
  • FIG. 1 illustrates a schematic overview showing a fastening tool for driving a fastener according to an example embodiment
  • FIG. 2 depicts a close up schematic view of the clutch disengagement detection system with the clutch engaged, according to an example embodiment
  • FIG. 3 depicts a close up schematic view of the clutch disengagement detection system with the clutch disengaged, according to an example embodiment
  • FIG. 4 depicts a partial section view of the fastening tool according to an example embodiment
  • FIG. 5 depicts a plot of the analog signal from the Hall effect sensor over time according to an example embodiment
  • FIG. 6 depicts a schematic view of the logic circuit according to an example embodiment
  • FIG. 7 illustrates a block diagram of a method of detecting clutch disengagement in a fastening tool in accordance with an example embodiment.
  • FIG. 1 illustrates a schematic overview showing a fastening tool 100 for driving a fastener 110 according to an example embodiment.
  • the fastening tool 100 may include a power source 120, a motor 130, a drive assembly 140, a clutch 150, an output spindle 160, an end effector 170, and processing circuitry 180, all of which may be disposed within, or operably coupled to, a housing 190.
  • the fastening tool 100 may be embodied as a nutrunner, cordless screwdriver, drill or the like, to which the fastener 110 may operably couple to be driven by the fastening tool 100.
  • the motor 130 may be disposed within the housing 190 and operably coupled to other components such as the power source 120 and to drive assembly 140.
  • the motor 130 may draw power from the power source 120 (perhaps via the processing circuitry 180) to generate output torque that may drive the fastener 110.
  • a drive shaft of the motor 130 may be operably coupled to the drive assembly 140, which may include a plurality of gears. In some cases, the gears of the drive assembly 140 may reduce the rotational velocity of the drive shaft and increase the output torque.
  • the fastening tool 100 may thus be configured to direct power from the power source 120 to the motor 130 responsive to the actuation of a trigger 135 by an operator.
  • the operator may actuate the trigger 135, which may send an actuation signal to the processing circuitry 180 indicative of the degree to which the trigger 135 may be actuated.
  • the processing circuitry 180 may use the actuation signal to determine how much power from the power source 120 may be directed to the motor 130, which may thereby dictate the rotational velocity of the motor 130.
  • the processing circuitry 180 may be configured to provide electronic control inputs to one or more functional units of the fastening tool 100 and to process data received at or generated by the one or more functional units of the fastening tool 100, such as the motor 130 and the clutch 150.
  • the processing circuitry 180 may be configured to perform data processing, control function execution and/or other processing and management services according to an example embodiment.
  • the processing circuitry 180 may be embodied as a chip or chip set.
  • the processing circuitry 180 may comprise one or more physical packages (e.g., chips) including materials, components and/or wires on a structural assembly (e.g., a baseboard such as a printed circuit board (PCB) ) .
  • PCB printed circuit board
  • the structural assembly may provide physical strength, conservation of size, and/or limitation of electrical interaction for component circuitry included thereon.
  • the processing circuitry 180 may therefore, in some cases, be configured to implement an embodiment of the present invention on a single chip or as a single “system on a chip. ” As such, in some cases, a chip or chipset may constitute means for performing one or more operations for providing the functionalities described herein.
  • the output torque may be translated to the output spindle 160 and to the end effector 170 from the drive assembly 140 via the clutch 150.
  • the fastening tool 100 may be used to tighten a fastener 110 responsive to operably coupling the end effector 170 to the fastener 110 and actuating the trigger 135 to generate the output torque via the motor 130.
  • the power source 120 may be a source of electricity such as an AC to DC converter connected to mains power or a battery supplying the motor 130 with a DC electric current.
  • the power source 120 may be a source of compressed air, and the motor 130 and thus the fastening tool 100 may be pneumatically powered.
  • the clutch 150 may define a predetermined torque threshold to which the fastening tool 100 may tighten the fastener 110 in order for the fastener 110 to be considered properly tightened. As will be described below in reference to FIGS. 2 and 3, the clutch 150 may be configured to disengage responsive to the predetermined torque threshold being reached. Thus, the disengagement of the clutch 150 may indicate the complete and successful tightening of the fastener 110. In this regard, the clutch 150 may rotationally operably couple the drive assembly 140 to the output spindle 160 at a 1: 1 ratio until the predetermined torque threshold is reached. Once the predetermined torque threshold has been reached, the clutch 150 may disengage and may generate a clutch disengagement signal. In some cases, the clutch disengagement signal may trigger the motor 130 to shut off. In some other cases, the clutch disengagement signal may simply note to the processing circuitry 180 the moment in time when the clutch 150 disengaged.
  • FIGS. 2 and 3 depict a close up schematic view of a clutch disengagement detection system 200 with the clutch 150 engaged and disengaged, respectively, according to an example embodiment.
  • FIG. 4 depicts a partial section view of the fastening tool 100 according to an example embodiment.
  • the clutch disengagement detection system 200 of some example embodiments may include the clutch 150, a flange 210, an arm 220, a magnet 230, a Hall effect sensor 240, and the processing circuitry 180. Also shown in FIGS. 2 and 3 are the motor 130, the drive assembly 140, and the output spindle 160 to illustrate how the clutch disengagement detection system 200 operably couples to other components of the fastening tool 100.
  • the clutch 150 may be a ball and detent type torque limiter.
  • the clutch 150 may rely on balls or rollers that may be disposed in detents formed between two clutch plates that may be biased together by a spring force from spring 250 (see FIG. 4) .
  • the balls or rollers may remain in their respective detents and roll in place in order to transfer torque from a first clutch plate 152 that may be operably coupled to the drive assembly 140 to a second clutch plate 154 that may be operably coupled to the output spindle 160.
  • the clutch 150 may be configured such that the balls or rollers may roll out of their respective detents and the first and second clutch plates (152, 154) may disengage with each other at the predetermined torque threshold, which may be the state depicted in FIG. 3.
  • the clutch plates (152, 154) may rely on the spring force in order to retain the balls in their respective detents and continue to transfer the torque from the drive assembly 140 to the output spindle 160.
  • the clutch 150 is configured to transfer all torque up to the predetermined torque threshold from the drive assembly 140 to the output spindle 160, but once the output torque reaches the predetermined torque threshold and the clutch 150 disengages, the clutch 150 may cease to transfer the torque from the drive assembly 140 to the output spindle 160.
  • the clutch 150, and the spring force between respective clutch plates (152, 154) may define the predetermined torque threshold for the fastening tool 100.
  • the spring force may be adjustable and the operator may set their desired predetermined torque threshold before operating the fastening tool 100.
  • the clutch 150 may be a slip type clutch or any other suitable type of clutch mechanism.
  • the clutch disengagement detection system 200 may determine that the clutch 150 may be engaged and may not generate a clutch disengagement signal accordingly.
  • the clutch disengagement detection system 200 may determine this based on the position of the components of the clutch disengagement detection system 200.
  • the flange 210 may be operably coupled to the clutch 150 and to the arm 220.
  • the flange 210 may be displaceable along a rotational axis 165 of the output spindle 160 and the drive assembly 140. Accordingly, the flange 210 may be specifically operably coupled to the second clutch plate 154.
  • the flange 210 may ride along with the second clutch plate 154. In doing so, the flange 210 may carry the arm 220 such that the flange 210 and the arm 220 may move in unison.
  • the arm 220 may therefore be operably coupled to the flange 210, and may be displaceable along an arm axis 225 responsive to the flange 210 being displaced along the rotational axis 165.
  • the motion of both the flange 210 and the arm 220 may occur in a 1: 1 ratio: for every millimeter the flange 210 moves, the arm 220 may necessarily move as well.
  • the arm axis 225 and the rotational axis 165 may be parallel and spaced apart from each other.
  • the flange 210 and the arm 220 may move along their respective axes simultaneously with each other without altering the operable coupling/spacing of the flange 210 and the arm 220.
  • the movement of the flange 210 and the arm 220 is highlighted by the difference in the positions of the flange 210 and the arm 220 in both of FIGS. 2 and 3.
  • the arm 220 may include the magnet 230 disposed at a fixed location at the arm 220.
  • the magnet 230 may be disposed at an opposite side of the arm axis 225 from the flange 210.
  • the magnet 230 may be disposed at an axial end of the arm 220, but in some other cases, the magnet 230 may be disposed at other suitable locations along the arm 220 as well. Since the magnet 230 may be disposed at a fixed location at the arm 220, the magnet 230 may also move with the arm 220 and the flange 210 in a 1: 1 ratio.
  • the movement of the magnet 230 may be confined to back and forth movement in a plane 235 that may be disposed parallel to, and spaced apart from, the arm axis 225.
  • the plane 235 may also be parallel to, and spaced apart from, the PCB comprising the processing circuitry 180.
  • the rotational axis 165, the arm axis 225, the plane 235 and the PCB comprising the processing circuitry 180 may all be spaced apart in a direction perpendicular to a direction of extension of each of the respective axes and PCB.
  • the magnet 230 may never contact the PCB comprising the processing circuitry 180.
  • the Hall effect sensor 240 may be disposed proximate to the arm 220 such that as the arm 220 may be displaced, the magnet 230 may move relative to the Hall effect sensor 240. In some cases, the Hall effect sensor 240 may be disposed on an opposite side of the processing circuitry 180 from the magnet 230 such that the PCB may be disposed between the Hall effect sensor 240 and the magnet 230. In an example embodiment, the Hall effect sensor 240 may be disposed at an axial end of the PCB comprising the processing circuitry 180. Thus, as the magnet 230 moves back and forth over the processing circuitry 180, the magnet 230 may also necessarily be moving back and forth over the Hall effect sensor 240. This may result in the Hall effect sensor generating an analog signal indicative of an input voltage 260 induced by the magnet 230.
  • the magnet 230 may not be disposed near the Hall effect sensor 240, and thus the Hall effect sensor 240 may not generate the analog signal.
  • the second clutch plate 154 may move the flange 210, which may move the arm 220, which may move the magnet 230 relative to the Hall effect sensor 240.
  • the analog signal may reach a peak value, or in other words, the input voltage 260 may reach a peak input voltage 270.
  • the analog signal may be displayed as the input voltage 260 generated by the magnet 230 and the Hall effect sensor 240 in the plot shown in FIG. 5.
  • the peak input voltage 270 may occur at the instant where the magnet 230 is at its closest position to the Hall effect sensor 240 in its path of movement in the plane 235.
  • the processing circuitry 180 may be operably coupled to the Hall effect sensor 240 and may be configured to convert the analog signal from the Hall effect sensor 240 into a clutch disengagement signal in digital form. The processing circuitry 180 may thus use the clutch disengagement signal to determine when the clutch 150 disengages the drive assembly 140 from the output spindle 160.
  • the clutch disengagement detection system 200 described above, and shown in FIGS. 2-4, may be improved over currently existing examples of clutch disengagement detection systems that may be in use today.
  • some current clutch disengagement detection systems may include the use of a micro-switch.
  • the micro-switch may be operably coupled to the arm 220, and responsive to the clutch 150 disengaging, the arm 220 may toggle the micro-switch so that the micro-switch sends a signal to the processing circuitry 180 that the clutch 150 has been disengaged.
  • the micro-switch may require contact with the arm 220 to toggle the switch.
  • the operable coupling of the arm 220 to the micro-switch may introduce increased mechanical wear on these particular components.
  • Such mechanical wear may greatly reduce the operational life cycle of not only the micro-switch and the arm 220, but also of the clutch disengagement detection system 200 as a whole.
  • the clutch disengagement detection system 200 may cease to detect when the clutch 150 disengages on a consistent basis, or in some cases, at all. Therefore, having the clutch disengagement detection system 200 include the magnet 230 and the Hall effect sensor 240 may minimize the number of components of the clutch disengagement detection system 200 that may be subject to increased mechanical wear, thereby improving the longevity and accuracy of the system 200.
  • FIG. 5 depicts a plot of the input voltage 260 from the Hall effect sensor 240 over time according to an example embodiment.
  • the arm 220, the magnet 230, the processing circuitry 180, and the Hall effect sensor 240 have been overlaid on the plot to better illustrate the correlation of the position of the magnet 230 relative to the Hall effect sensor 240 to the input voltage 260 value that results.
  • the arm 220 and the magnet 230 are disposed in a first position 280 depicted by the broken line outline of the arm 220 and the magnet 230.
  • the first position 280 may correspond to the clutch 150 being engaged.
  • the arm 220 and the magnet 230 may thus move from the first position 280 into a second position 290 in which the magnet 230 is at a closest point to the Hall effect sensor 240, as depicted by the solid line depiction of the arm 220 and the magnet 230.
  • the input voltage 260 may increase as the magnet 230 approaches the Hall effect sensor 240.
  • the input voltage 260 may increase to the peak input voltage 270, which may occur at the second position 290 in which the magnet 230 is at a closest point to the Hall effect sensor 240.
  • the clutch 150 may reengage, which may see the arm 220 and the magnet 230 move back into the first position 280, which may correspond to the subsequent drop in input voltage 260 following the peak input voltage 270.
  • This process may repeat itself over time with the arm 220 and magnet 230 oscillating between the first and second positions (280, 290) .
  • the plot in FIG. 5 were extended out into future times, the plot may show repeated humps indicating repeated peak input voltages 270.
  • FIG. 6 depicts a schematic view of a logic circuit according to an example embodiment.
  • the processing circuitry 180 may include a logic circuit 300 which may include an amplifier 310 and a differential capacitor 320.
  • the logic circuit 300 may be how the processing circuitry 180 determines if the clutch 150 has disengaged or not based on the input voltage 260.
  • the amplifier 310 may scale up the input voltage 260 from the Hall effect sensor 240 in the logic circuit 300.
  • the amplifier 310 may be included in some example embodiments because the magnitude of the input voltage 260 generated by the Hall effect sensor 240 may be small due to the nature of the Hall effect sensor 240 and how it generates the input voltage 260 due to the magnetic field of the magnet 230.
  • the amplifier 310 may scale the input voltage 260 up appropriately.
  • the logic circuit 300 may determine when the clutch 150 has disengaged by essentially comparing the input voltage 260, after it may be scaled up by the amplifier 310, to a threshold voltage difference defined by the differential capacitor 320. Once the input voltage 260 has increased to the point of exceeding the threshold voltage difference of the differential capacitor 320, then the logic circuit 300 may determine that the clutch 150 has disengaged, and that the output torque has reached the predetermined torque threshold. The logic circuit 300 may then accordingly generate the clutch disengagement signal in digital form for the processing circuitry 180, thereby converting the analog signal into the clutch disengagement signal in digital form.
  • the threshold voltage difference may correspond to the peak input voltage 270 that may be generated when the magnet 230 and the Hall effect sensor 240 may be disposed closest to one another.
  • all of the illustrated resistance, capacitance or other values shown on the logic circuit 300 represent non-limiting examples of such values.
  • FIG. 7 shows a block diagram of a method of detecting clutch 150 disengagement in a fastening tool 100.
  • the method may include recording the analog signal from the magnet 230 using the Hall effect sensor 240 at operation 700, and converting the analog signal into the clutch disengagement signal in digital form via the processing circuitry 180 comprising the logic circuit 300 at operation 710. Finally, the method may also include determining when the clutch 150 may disengage the drive assembly 140 and the output spindle 160 using the clutch disengagement signal and the logic circuit 300 at operation 720.
  • Some example embodiments may provide for a clutch disengagement detection system for a fastening tool.
  • the system may include a clutch which may operably couple a drive assembly to an output spindle, the clutch may be configured to alternatingly rotationally engage and disengage the output spindle and the drive assembly based on an output torque and a predetermined torque threshold, a flange which may be operably coupled to the clutch, the flange may be displaceable along a rotational axis of the output spindle and the drive assembly, an arm which may be operably coupled to the flange, the arm may be displaceable along an arm axis responsive to the flange being displaced along the rotational axis, a magnet which may be disposed at a fixed location on the arm, a Hall effect sensor which may be disposed proximate to the arm such that as the arm may be displaced, the magnet may move relative to the Hall effect sensor, and processing circuitry which may be operably coupled to the Hall effect sensor and may be configured to convert an analog signal from the Hall
  • the clutch disengagement detection system of some embodiments may include additional features, modifications, augmentations and/or the like to achieve further objectives or enhance performance of the system.
  • the additional features, modifications, augmentations and/or the like may be added in any combination with each other.
  • the arm axis and the rotational axis may be parallel and spaced apart from each other.
  • the magnet may be disposed at an opposite side of the arm axis from the flange.
  • the flange may carry the arm such that the flange and the arm may move in unison.
  • the Hall effect sensor may be operably coupled to an opposite side of a printed circuit board of the processing circuitry from the arm such that the printed circuit board may be disposed between the hall effect sensor and the magnet.
  • the processing circuitry may include a logic circuit including an amplifier and a differential capacitor.
  • the analog signal from the Hall effect sensor may be an input voltage.
  • the amplifier may scale up the input voltage from the Hall effect sensor in the logic circuit.
  • the differential capacitor may include a threshold voltage difference that may correspond to a peak input voltage generated when the magnet and the Hall effect sensor may be disposed closest to one another.
  • the logic circuit responsive to the input voltage exceeding the threshold voltage difference, the logic circuit may determine that the clutch may have disengaged the output spindle from the drive assembly, and that the output torque may have reached the predetermined torque threshold.
  • the fastening tool may include a housing, a motor which may be disposed within the housing and may be configured to generate an output torque, a power source which may be configured to supply power to the motor, a trigger which may be configured to control a rotational velocity of the motor, an output spindle which may be configured to operably couple with a fastener at a first end of the output spindle, a drive assembly which may be operably coupled to the motor and to a second end of the output spindle to transmit the output torque to the output spindle, and a clutch disengagement detection system.
  • the clutch disengagement detection system may include a clutch which may operably couple the drive assembly to the output spindle, the clutch may be configured to alternatingly rotationally engage and disengage the output spindle and the drive assembly based on an output torque and a predetermined torque threshold, a flange which may be operably coupled to the clutch, the flange may be displaceable along a rotational axis of the output spindle and the drive assembly, an arm which may be operably coupled to the flange, the arm may be displaceable along an arm axis responsive to the flange being displaced along the rotational axis, a magnet which may be disposed at a fixed location on the arm, a Hall effect sensor which may be disposed proximate to the arm such that as the arm may be displaced, the magnet may move relative to the Hall effect sensor, and processing circuitry which may be operably coupled to the Hall effect sensor and may be configured to convert an analog signal from the Hall effect sensor into a clutch disengagement signal in digital form.
  • the processing circuitry may use
  • the tool may include a clutch which may operably couple a drive assembly to an output spindle, the clutch may be configured to alternatingly rotationally engage and disengage the output spindle and the drive assembly based on an output torque and a predetermined torque threshold, a flange which may be operably coupled to the clutch, the flange may be displaceable along a rotational axis of the output spindle and the drive assembly, an arm which may be operably coupled to the flange, the arm may be displaceable along an arm axis responsive to the flange being displaced along the rotational axis, a magnet which may be disposed at a fixed location on the arm, a Hall effect sensor which may be disposed proximate to the arm such that as the arm may be displaced, the magnet may move relative to the Hall effect sensor, and processing circuitry which may be operably coupled to the Hall effect sensor and may be configured to convert an analog signal from the Hall effect
  • the method may include recording an analog signal from the magnet using the Hall effect sensor, converting the analog signal into a clutch disengagement signal in digital form via a logic circuit, and determining when the clutch disengages the drive assembly and the output spindle using the clutch disengagement signal and the logic circuit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

L'invention concerne un système de détection de désaccouplement d'embrayage (200) pour un outil de fixation (100) qui peut comprendre un embrayage (150) qui peut coupler un ensemble entraînement (140) à une broche de sortie (160) sur la base d'un couple de sortie et d'un seuil de couple prédéterminé, une bride (210) qui peut être déplacée le long d'un axe de rotation (165) de la broche de sortie (160) et de l'ensemble entraînement (140), un bras (220) qui peut être déplacé le long d'un axe de bras (225) en réponse au déplacement de la bride (210) le long de l'axe de rotation (165), un aimant (230) qui peut être disposé au niveau du bras (220), un capteur à effet Hall (240), et un circuit de traitement (180) qui peut être couplé au capteur à effet Hall (240) et peut être configuré pour convertir un signal analogique en provenance du capteur à effet Hall (240) en un signal de désaccouplement d'embrayage sous forme numérique. Le circuit de traitement (180) peut utiliser le signal de désaccouplement d'embrayage pour déterminer le moment auquel l'embrayage (150) vient en prise avec l'ensemble entraînement (140) et la broche de sortie (160) et se désaccouple de ceux-ci.
PCT/CN2024/081380 2024-03-13 2024-03-13 Système et procédé de détection de désaccouplement d'embrayage Pending WO2025189384A1 (fr)

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PCT/CN2024/081380 WO2025189384A1 (fr) 2024-03-13 2024-03-13 Système et procédé de détection de désaccouplement d'embrayage

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PCT/CN2024/081380 WO2025189384A1 (fr) 2024-03-13 2024-03-13 Système et procédé de détection de désaccouplement d'embrayage

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WO2023096718A1 (fr) * 2021-11-24 2023-06-01 Apex Brands, Inc. Ensemble outil électrique rotatif de commande de couple
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